Sample injection needle cleaning device and sample application equipment
By designing a needle cleaning device and using a switching valve to control the retention of cleaning solution, the problem of contamination caused by the drying of the needle was solved, and the continuous wetting and re-cleaning of the needle was achieved, thus improving the experimental quality.
Patent Information
- Application Number
- CN202422840508.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-11-21
AI Technical Summary
In existing thin-layer chromatography spotting equipment, the injection needle is left to air dry after cleaning, which can lead to water stains or sample residues. Furthermore, it is easily contaminated when exposed to air, affecting the experimental results.
Design a needle cleaning device, comprising a main body, an inlet, an outlet, and a cleaning space. A switching valve is used to control the retention of cleaning solution to keep the needle moist. After cleaning, the needle can be immersed in the cleaning solution to avoid contamination and can be cleaned again before the next use.
This effectively avoids contamination of the injection needle, improves experimental results, and ensures the cleanliness and accuracy of the injection needle during the next sampling and spotting.
Smart Images
Figure CN223571485U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of biological medicine technology, specifically, relate to a sampling needle cleaning device and sample spotting equipment. BACKGROUND
[0002] Thin layer chromatography sample spotting experiment has wide application in chemistry, biology, medicine, environment and other fields. In thin layer chromatography sample spotting experiment, sampling needle is needed to sample and spot sample. After sampling needle is used, sampling needle needs to be cleaned.
[0003] In the existing sample spotting equipment, after sampling needle is cleaned, sampling needle is usually naturally dried and is in dry state. However, sampling needle after drying may have water stain or sample residue and other problems, and sampling needle after drying is exposed to air and may be polluted by external environment, so that sampling needle directly participates in sampling and spotting sample next time, which will adversely affect experimental results. UTILITY MODEL CONTENT
[0004] In order to at least partially solve the problems in the prior art, according to one aspect of the utility model, a sampling needle cleaning device is provided. The sampling needle cleaning device comprises a main body, a liquid inlet and a liquid outlet are arranged on the main body, a cleaning space for inserting a sampling needle to be cleaned and a first liquid discharge space for containing cleaning liquid overflowing from the cleaning space are formed in the main body, the cleaning space is communicated to the liquid inlet, and the cleaning liquid in the first liquid discharge space is discharged to the outside through the liquid outlet, wherein the liquid inlet is connected with a switching valve, the switching valve has an opening state of opening the liquid inlet and a closing state of closing the liquid inlet, and the cleaning space remains cleaning liquid storage under the opening state and the closing state of the switching valve.
[0005] The sampling needle cleaning device provided by the utility model can clean the sampling needle by inserting the sampling needle into the cleaning space. After the sampling needle is cleaned, the cleaning space can remain cleaning liquid storage under the action of the switching valve, the cleaned sampling needle can be soaked in the cleaning liquid stored in the cleaning space, so that the sampling needle is always in a wet state, which can not only avoid pollution of the sampling needle exposed to air, but also can wash the sampling needle with the cleaning liquid when the sampling needle is taken out from the cleaning liquid stored in the cleaning space before the sampling needle participates in sampling and spotting next time, so that the sampling needle has better experimental effect when participating in sampling and spotting next time.
[0006] Exemplarily, the cleaning space comprises a first cleaning part and a second cleaning part, one end of the first cleaning part is communicated to the liquid inlet, the other end is connected to the second cleaning part, and the inner diameter of the second cleaning part gradually increases along the direction away from the first cleaning part.
[0007] Illustratively, the main body is provided with an inclined bottom surface for guiding the flow of cleaning liquid to the liquid discharge port, and the inclined bottom surface is located at the bottom of the first liquid discharge space.
[0008] Illustratively, the inclined bottom surface is provided with a flow guide groove for converging the cleaning liquid on the inclined bottom surface.
[0009] Illustratively, one end of the flow guide groove close to the liquid discharge port is formed with a connecting port, the connecting port abuts against the side wall of the main body, and the first liquid discharge space is communicated to the liquid discharge port through the connecting port.
[0010] Illustratively, the flow guide groove is provided with a flow guide portion recessed away from the first liquid discharge space and close to the liquid discharge port, and the connecting port is formed at the lowest point of the flow guide portion.
[0011] Illustratively, the flow guide portion surrounds the connecting port.
[0012] Illustratively, the main body includes a second liquid discharge space, a first end of the second liquid discharge space is communicated to the liquid discharge port, a second end of the second liquid discharge space is communicated to the connecting port, and the second end is not lower than the first end.
[0013] Illustratively, the sample injection needle cleaning device includes an anti-overflow frame, the anti-overflow frame is enclosed to form a containing cavity, and the main body is arranged in the containing cavity.
[0014] According to another aspect of the present application, a sample application device is provided. The sample application device includes a sample injection device and any one of the sample injection needle cleaning devices as described above, and the sample injection device includes a sample injection needle, which can be inserted into the cleaning space.
[0015] A series of simplified forms are introduced in the utility model content, which will be further described in detail in the specific embodiment part. The utility model content part does not mean trying to limit the key features and necessary technical features of the claimed technical solution, and more does not mean trying to determine the protection scope of the claimed technical solution.
[0016] The advantages and features of the present application will be described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS
[0017] The following drawings of the present application are hereby incorporated as part of the present application for understanding the present application. The embodiments of the present application and the description thereof shown in the drawings are used to explain the principles of the present application. In the drawings,
[0018] Figure 1 It is a perspective view of the sample injection needle cleaning device according to an exemplary embodiment of the present application;
[0019] Figure 2 It is a perspective view of the sample injection needle cleaning device according to an exemplary embodiment of the present application; Figure 1 It is a top view of the sample injection needle cleaning device shown in the drawing; and
[0020] Figure 3 For Figure 1 A cross-sectional view of the sample injection needle cleaning device.
[0021] Wherein, the above figures include the following reference signs:
[0022] 100, main body; 110, liquid inlet; 120, liquid outlet; 130, cleaning space; 131, first cleaning part; 132, second cleaning part; 140, first liquid discharge space; 150, second liquid discharge space; 151, first end; 152, second end; 160, inclined bottom surface; 161, flow guide groove; 162, flow guide part; 163, connecting port; 200, anti-overflow frame; 210, accommodating cavity. DETAILED DESCRIPTION
[0023] In the following description, a large number of details are provided in order to enable a thorough understanding of the present application. However, it can be appreciated by those skilled in the art that the following description only exemplarily shows the preferred embodiments of the present application, and the present application can be implemented without one or more such details. In addition, in order to avoid confusion with the present application, some technical features known in the art are not described in detail.
[0024] According to one aspect of the present application, a sample injection needle cleaning device is provided. The sample injection needle cleaning device can include a cleaning space. The sample injection needle cleaning device can be applied to any suitable device, including but not limited to a sample spotting device. Therefore, according to another aspect of the present application, a sample spotting device is provided. The sample spotting device can include a sample injection device and any one of the sample injection needle cleaning devices to be introduced hereinafter. The sample injection device can include a sample injection needle, which can sample a sample. The sample injection needle needs to be cleaned after sampling and spotting. The sample injection needle can be inserted into the cleaning space of the sample injection needle cleaning device, and the sample injection needle cleaning device can clean the sample injection needle inserted into the cleaning space.
[0025] Referring to Figure 1 , Figure 2 and Figure 3The injection needle cleaning device can include a main body 100, and the main body 100 can be provided with a liquid inlet 110 and a liquid outlet 120. The liquid inlet 110 and the liquid outlet 120 can be pipe interfaces or any other suitable forms. The liquid inlet 110 can be connected to an external liquid supply device through a pipe or any other form, and the liquid outlet 120 can be connected to an external waste liquid tank through a pipe or any other form, or the liquid outlet 120 can be directly connected to the outside, so that the liquid entering the liquid outlet 120 will be directly discharged to the outside. A cleaning space 130 for inserting the injection needle to be cleaned and a first liquid discharge space 140 for receiving the overflow cleaning liquid in the cleaning space 130 can be formed in the main body 100. The cleaning space 130 can match the shape of the injection needle to be cleaned. For example, for a conventional injection needle, a cylindrical cavity can be provided in the main body 100, and the cleaning space 130 can be formed in the cylindrical cavity. The cleaning space 130 can be connected to the liquid inlet 110. The liquid inlet 110 can be connected to the liquid supply device, and the cleaning liquid delivered by the liquid supply device can enter the cleaning space 130 in the main body 100 through the liquid inlet 110. The first liquid discharge space 140 is used to receive the overflow cleaning liquid in the cleaning space 130, that is, the liquid inlet 110 can be connected to the bottom of the cleaning space 130, as the cleaning liquid continuously enters the cleaning space 130 through the liquid inlet 110, the cleaning liquid in the cleaning space 130 will overflow at the top of the cleaning space 130, and the overflow cleaning liquid can enter the first liquid discharge space 140. The liquid outlet 120 can be connected to an external waste liquid tank, and the liquid entering the liquid outlet 120 can be discharged to the outside of the injection needle cleaning device. The first liquid discharge space 140 can be connected to the liquid outlet 120. The cleaning liquid in the first liquid discharge space 140 can be discharged to the outside through the liquid outlet 120. The first liquid discharge space 140 can be directly connected to the liquid outlet 120, or indirectly connected to the liquid outlet 120 through other connecting structures. For example, when the first liquid discharge space 140 is directly connected to the liquid outlet 120, the liquid outlet 120 can be formed on the side wall surrounding the first liquid discharge space 140, and the cleaning liquid in the first liquid discharge space 140 will directly enter the liquid outlet 120 and be discharged to the outside. When the first liquid discharge space 140 is indirectly connected to the liquid outlet 120, the first liquid discharge space 140 can be connected to a liquid discharge pipeline, and the liquid outlet 120 can be formed on the end of the liquid discharge pipeline away from the first liquid discharge space 140, and the cleaning liquid in the first liquid discharge space 140 will first enter the liquid discharge pipeline, and then enter the liquid outlet 120 and be discharged to the outside. Exemplarily, the first liquid discharge space 140 can be connected to a second liquid discharge space 150, and the end of the second liquid discharge space 150 away from the first liquid discharge space 140 can be connected to the liquid outlet 120, which will be described in detail below in combination with specific embodiments.
[0026] The inlet 110 can be connected with a switching valve, which can have an open state to open the inlet 110 and a closed state to close the inlet 110, and the inlet 110 can be controlled to be opened or closed by controlling the switching valve. The cleaning space 130 can keep the cleaning liquid stored in the cleaning space 130 in the open state and the closed state of the switching valve.
[0027] In use, the sampling needle is inserted into the cleaning space 130, the inlet 110 is controlled to be in the open state by the switching valve, and the cleaning liquid can enter the cleaning space 130 through the inlet 110. The flowing cleaning liquid can clean the sampling needle in the cleaning space 130. As the cleaning liquid in the cleaning space 130 gradually increases, part of the cleaning liquid will overflow from the cleaning space 130, and the overflowed cleaning liquid can enter the first drainage space 140 and flow to the drainage outlet 120 to be discharged to the outside. The inlet 110 is kept in the open state, and the cleaning liquid continuously flows in the cleaning space 130 to clean the sampling needle. After a period of cleaning, the inlet 110 is controlled to be in the closed state by the switching valve, and no cleaning liquid enters the cleaning space 130. Since the cleaning space 130 can keep the cleaning liquid stored in the cleaning space 130 in the open state and the closed state of the switching valve, the cleaning liquid is still stored in the cleaning space 130 after the inlet 110 is closed, and the cleaned sampling needle can be soaked in the cleaning liquid stored in the cleaning space 130 to keep the sampling needle wet, avoiding the sampling needle being polluted by being exposed to the air.
[0028] The sampling needle cleaning device provided by the utility model can clean the sampling needle by inserting the sampling needle into the cleaning space 130. After the sampling needle is cleaned, the cleaning space 130 can keep the cleaning liquid stored in the cleaning space 130 under the action of the switching valve, and the cleaned sampling needle can be soaked in the cleaning liquid stored in the cleaning space 130, so that the sampling needle can be kept wet, avoiding the sampling needle being polluted by being exposed to the air, and the sampling needle can be washed by the cleaning liquid when the sampling needle is taken out from the cleaning liquid stored in the cleaning space 130 before the sampling needle participates in sampling and sampling next time, so that the sampling needle can have better experimental effect in sampling and sampling next time.
[0029] In an embodiment of the utility model, referring to Figure 1 、 Figure 2 and Figure 3The cleaning space 130 can include a first cleaning part 131 and a second cleaning part 132, which can be two parts of the cleaning space 130 divided along the direction of gravity. One end of the first cleaning part 131 can be communicated to the liquid inlet 110, and the other end can be connected to the second cleaning part 132. The second cleaning part 132 can be connected to the first cleaning part 131 above in the direction of gravity. The cleaning liquid entering the cleaning space 130 from the liquid inlet 110 can first enter the first cleaning part 131. As the amount of cleaning liquid entering the cleaning space 130 increases, the highest water level of the cleaning liquid in the cleaning space 130 can gradually rise into the second cleaning part 132. The inner diameter of the second cleaning part 132 can gradually increase along the direction away from the first cleaning part 131. In the embodiment as shown, the inner diameter of the second cleaning part 132 can gradually increase upward along the direction of gravity. After part of the cleaning liquid enters the second cleaning part 132, due to the gradual increase of the inner diameter of the second cleaning part 132 along the direction away from the first cleaning part 131, even if the flow rate of the cleaning liquid entering the liquid inlet 110 remains unchanged, the rising speed of the highest water level of the cleaning liquid will slow down. When the sampling needle is inserted into the cleaning space 130, the sampling needle can be inserted from the end of the second cleaning part 132 away from the first cleaning part 131. The inner diameter of the end of the second cleaning part 132 away from the first cleaning part 131 will be greater than the inner diameter of the end of the second cleaning part 132 close to the first cleaning part 131, so that the insertion of the sampling needle into the cleaning space 130 can be easier; and the cleaning space 130 with the distribution of generally large at the top and small at the bottom is also more suitable for the shape of the conventional sampling needle, which can avoid waste of structural space, and the cleaning efficiency of the cleaning liquid on the sampling needle in the cleaning space 130 can be higher.
[0030] In an embodiment of the present application, referring to Figure 1 , Figure 2 and Figure 3 , the main body 100 can be provided with an inclined bottom surface 160 for guiding the flow of cleaning liquid to the liquid outlet 120. The inclined bottom surface 160 can be located at the bottom of the first liquid discharge space 140. The cleaning liquid overflowing in the cleaning space 130 will gather at the bottom of the first liquid discharge space 140 under the action of gravity after entering the first liquid discharge space 140. The bottom of the first liquid discharge space 140 is provided in the form of an inclined bottom surface 160, and the inclined bottom surface 160 can guide the flow of cleaning liquid to the liquid outlet 120. In this way, the cleaning liquid in the first liquid discharge space 140 can more easily flow to the liquid outlet 120 and be discharged through the liquid outlet 120, and in this way, the residual cleaning liquid in the first liquid discharge space 140 can be avoided.
[0031] Exemplarily, referring to Figure 2 and Figure 3The inclined bottom surface 160 can be provided with a flow guide groove 161 for gathering the cleaning liquid on the inclined bottom surface 160. The flow guide groove 161 can be the lowest in height on the inclined bottom surface 160 in the direction of gravity. The flow guide groove 161 can be communicated to the liquid discharge port 120. The inclined bottom surface 160 can be in the form of a combined inclined surface, for example, the inclined bottom surface 160 can be formed by two surfaces that are inclined to the liquid discharge port 120 and are connected to each other to form a flow guide groove 161 similar to a central joint, so that the cleaning liquid on the inclined bottom surface 160 flows towards the flow guide groove 161 and the liquid discharge port 120 under the guidance. The inclined bottom surface 160 can also be in the form of an inclined curved surface, which is not described here. The cleaning liquid on the inclined bottom surface 160 can first enter the flow guide groove 161 and then flow to the liquid discharge port 120 in the flow guide groove 161. The provision of the flow guide groove 161 can make the cleaning liquid on the inclined bottom surface 160 first gather in the flow guide groove 161 and then flow to the liquid discharge port 120, so that the cleaning liquid in the first liquid discharge space 140 can flow to the liquid discharge port 120 more efficiently, and the liquid discharged from the liquid discharge port 120 of the sample needle cleaning device can also be more uniform.
[0032] Exemplarily, referring to Figure 2 and Figure 3 , one end of the flow guide groove 161 close to the liquid discharge port 120 can be formed with a connecting port 163, which can abut against the side wall of the main body 100. The first liquid discharge space 140 can be communicated to the liquid discharge port 120 through the connecting port 163. The cleaning liquid on the inclined bottom surface 160 can be gathered in the flow guide groove 161 and then communicated to the liquid discharge port 120 through the connecting port 163. The connecting port 163 can be communicated to the liquid discharge port 120 through an internal passage penetrating the side wall of the main body 100, or can be communicated to the liquid discharge port 120 through a pipeline connection or any other suitable form. The first liquid discharge space 140 is communicated to the liquid discharge port 120 through the connecting port 163, and the connecting port 163 abuts against the side wall of the main body 100. The cleaning liquid in the first liquid discharge space 140 can flow to the liquid discharge port 120 more uniformly through the connecting port 163, and the liquid discharged from the liquid discharge port 120 of the sample needle cleaning device can also be more uniform.
[0033] Exemplarily, the flow guide groove 161 can be provided with a flow guide portion 162 recessed away from the first liquid drainage space 140 and toward the liquid drainage port 120, and a connecting port 163 can be formed at the lowest position of the flow guide portion 162. The cleaning liquid on the inclined bottom surface 160 can be gathered in the flow guide groove 161, and the cleaning liquid in the flow guide groove 161 can flow to the flow guide portion 162 first, and then flow to the connecting port 163 under the guidance of the flow guide portion 162, so as to flow to the liquid drainage port 120 through the connecting port 163. In this way, the cleaning liquid in the first liquid drainage space 140 can be prevented from remaining in the flow guide groove 161, and the cleaning liquid is not easy to remain on the flow guide portion 162 after flowing to the flow guide portion 162, so as to further prevent the cleaning liquid in the first liquid drainage space 140 from remaining.
[0034] Exemplarily, the flow guide portion 162 can surround the connecting port 163. When the flow guide portion 162 surrounds the connecting port 163, the edge of the flow guide portion 162 and the edge of the connecting port 163 can be coincident, and the edge of the flow guide portion 162 can be tangent to the side wall of the main body 100. In this way, it can be ensured that the cleaning liquid in the first liquid drainage space 140 flows to the flow guide portion 162 first and then flows to the connecting port 163, and it can be further ensured that the cleaning liquid flowing to the flow guide portion 162 can all flow to the connecting port 163, so as to further prevent the cleaning liquid in the first liquid drainage space 140 from remaining. Moreover, the cleaning liquid in the first liquid drainage space 140 flows to the flow guide portion 162 and then flows to the connecting port 163, so that the cleaning liquid flowing to the liquid drainage port 120 through the connecting port 163 can be more uniform.
[0035] In an embodiment of the present application, referring to Figure 3 , the main body 100 can include a second liquid drainage space 150, a first end 151 of the second liquid drainage space 150 can be communicated to the liquid drainage port 120, a second end 152 of the second liquid drainage space 150 can be communicated to the connecting port 163, and the second end 152 can be higher than the first end 151. The first end 151 of the second liquid drainage space 150 can be directly communicated to the liquid drainage port 120, or can be communicated to the liquid drainage port 120 through a pipeline or any other suitable form. The second end 152 can be located above the first end 151 in the direction of gravity. After the cleaning liquid in the first liquid drainage space 140 flows to the connecting port 163, the cleaning liquid can enter the second liquid drainage space 150, wherein the cleaning liquid can flow into the second liquid drainage space 150 from the second end 152 and then flow to the liquid drainage port 120 from the first end 151. When the cleaning liquid overflowing from the cleaning space 130 is too much to be discharged from the liquid drainage port 120 in time, part of the cleaning liquid can first remain in the second liquid drainage space 150. In this way, the provision of the second liquid drainage space 150 can prevent the cleaning liquid in the first liquid drainage space 140 from overflowing to the outside of the main body 100.
[0036] In an embodiment of the present application, referring to Figure 1 , Figure 2 and Figure 3 , the sample injection needle cleaning device can include an anti-overflow frame 200, the anti-overflow frame 200 can be enclosed to form a containing cavity 210, and the main body 100 can be arranged in the containing cavity 210. The containing cavity 210 enclosed by the anti-overflow frame 200 can accommodate the cleaning liquid overflowing to the outside of the main body 100, and the arrangement of the anti-overflow frame 200 can avoid the cleaning liquid from polluting the external environment when overflowing to the outside of the main body 100.
[0037] In the description of the present application, it should be understood that the orientation words such as "front", "back", "up", "down", "left", "right", "horizontal", "vertical", "vertical", "horizontal" and "top", "bottom" and the like indicate the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, without the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the protection scope of the present application; the orientation words "in" and "out" refer to the inside and outside of the contour of each component itself.
[0038] In order to facilitate the description, the area relative terms such as "on", "above", "upper surface", "upper" and the like can be used here to describe the area position relationship of one or more components or features shown in the figure with other components or features. It should be understood that the area relative terms not only include the orientation of the components described in the figure, but also include different orientations in use or operation. For example, if the components in the figure are inverted as a whole, the components "above" or "above" other components or features will include the case of "below" or "below" other components or structures. Therefore, the exemplary term "above" can include both "above" and "below". In addition, these components or features can also be positioned at other different angles (for example, rotated by 90 degrees or other angles), and all these cases are intended to be included herein.
[0039] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form, and in addition, it should be understood that when the terms "comprise" and / or "include" are used in the specification, it means that the features, steps, operations, components, assemblies and / or their combinations are present.
[0040] It should be noted that the terms "first", "second", and the like in the description and claims of the present application and above drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.
[0041] The present application has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and illustration, and are not intended to limit the present application to the scope of the described embodiments. In addition, those skilled in the art can understand that the present application is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present application, which are all within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalent scope.
Claims
1. A sample introduction needle cleaning device, characterized by, The injection needle cleaning device comprises a main body, a liquid inlet and a liquid outlet are arranged on the main body, a cleaning space for inserting an injection needle to be cleaned and a first liquid discharge space for containing cleaning liquid overflowing from the cleaning space are formed in the main body, the cleaning space is communicated to the liquid inlet, the cleaning liquid in the first liquid discharge space is discharged to the outside through the liquid outlet, Wherein, the liquid inlet is connected with a switching valve, the switching valve has an open state for opening the liquid inlet and a closed state for closing the liquid inlet, the cleaning space remains the cleaning liquid in both the open state and the closed state of the switching valve.
2. The sample introduction needle cleaning apparatus of claim 1, wherein The cleaning space comprises a first cleaning part and a second cleaning part, one end of the first cleaning part is communicated to the liquid inlet, the other end is connected to the second cleaning part, the inner diameter of the second cleaning part gradually increases along the direction away from the first cleaning part.
3. The sample needle cleaning device of claim 1, wherein, An inclined bottom surface for guiding the cleaning liquid to flow to the liquid outlet is arranged in the main body, and the inclined bottom surface is located at the bottom of the first liquid discharge space.
4. The sample introduction needle cleaning apparatus of claim 3, wherein, A flow guide groove for converging the cleaning liquid on the inclined bottom surface is arranged on the inclined bottom surface.
5. The sample introduction needle cleaning apparatus of claim 4, wherein, One end of the flow guide groove close to the liquid outlet is formed with a connecting port, the connecting port abuts against the side wall of the main body, and the first liquid discharge space is communicated to the liquid outlet through the connecting port.
6. The sample introduction needle cleaning apparatus of claim 5, wherein, A flow guide part recessed away from the first liquid discharge space and close to the liquid outlet is arranged on the flow guide groove, and the connecting port is formed at the lowest position of the flow guide part.
7. The sample introduction needle cleaning apparatus of claim 6, wherein, The flow guide part surrounds the connecting port.
8. The sample introduction needle cleaning apparatus of claim 5, wherein, The main body comprises a second liquid discharge space, a first end of the second liquid discharge space is communicated to the liquid outlet, a second end of the second liquid discharge space is communicated to the connecting port, and the second end is not lower than the first end.
9. The sample introduction needle cleaning apparatus of claim 1, wherein, The injection needle cleaning device comprises an anti-overflow frame, the anti-overflow frame forms a containing cavity, and the main body is arranged in the containing cavity.
10. A spotting device characterized in that, The injection needle cleaning device comprises an injection device and an injection needle cleaning device as claimed in any one of claims 1-9, the injection device comprises an injection needle, and the injection needle can be inserted into the cleaning space. The injection needle cleaning device comprises an anti-overflow frame, the anti-overflow frame forms a containing cavity, and the main body is arranged in the containing cavity.