CN220901306U - Needle washing structure and automatic sampling equipment - Google Patents
Needle washing structure and automatic sampling equipment Download PDFInfo
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- CN220901306U CN220901306U CN202322790050.1U CN202322790050U CN220901306U CN 220901306 U CN220901306 U CN 220901306U CN 202322790050 U CN202322790050 U CN 202322790050U CN 220901306 U CN220901306 U CN 220901306U
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- 238000005406 washing Methods 0.000 title claims abstract description 105
- 238000005070 sampling Methods 0.000 title claims abstract description 71
- 238000004140 cleaning Methods 0.000 claims abstract description 130
- 239000002699 waste material Substances 0.000 claims description 32
- 238000007599 discharging Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 13
- 239000012530 fluid Substances 0.000 abstract description 10
- 238000002347 injection Methods 0.000 abstract description 8
- 239000007924 injection Substances 0.000 abstract description 8
- 206010011409 Cross infection Diseases 0.000 abstract description 7
- 206010029803 Nosocomial infection Diseases 0.000 abstract description 7
- 239000007921 spray Substances 0.000 abstract description 5
- 238000004811 liquid chromatography Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 28
- 239000000243 solution Substances 0.000 description 8
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000012545 processing Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000012864 cross contamination Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 208000015181 infectious disease Diseases 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The application discloses a needle washing structure and automatic sample injection equipment, and belongs to the technical field of liquid chromatography. Comprising the following steps: a needle washer configured with a needle wash slot configured to receive at least a portion of a sampling needle; the cleaning component is configured on one side of the needle washer and communicated with the needle washing groove so as to be used for cleaning the outer wall of the sampling needle. The cleaning component is connected with the needle washer, and the cleaning component is communicated with the needle washing groove, so that when the sampling needle is placed in the needle washing groove, firstly, the switching valve is switched to be communicated with the sampling needle through the communicating cleaning fluid and the injection pump after the cleaning fluid is sucked, and the cleaning fluid is injected, so that the inner wall of the sampling needle is cleaned, then the switching valve is switched to be communicated with the cleaning component, and the cleaning fluid is injected, the cleaning component sprays the cleaning fluid to the outer wall of the sampling needle, so that the outer wall of the sampling needle is cleaned, the whole cleaning process is carried out, the sampling needle is all positioned in the needle washing groove, the cleaning degree is improved, cross infection is reduced, and the residual index is better.
Description
Technical Field
The application relates to the technical field of liquid chromatography, in particular to a needle washing structure and automatic sample injection equipment.
Background
Sample analyzers typically use a sampling needle to sample and process and analyze the sample.
After sampling, the sampling needle is attached with liquid, and in order to avoid the attached liquid polluting other samples, the sampling needle needs to be cleaned. At present, the existing instruments adopt a rough needle washing structure, most of the existing instruments utilize the needle washing structure to load a cleaning liquid, and then the sampling needle is immersed in the cleaning liquid to clean the outer wall of the sampling needle; then the cleaning liquid in the needle cleaning structure is pumped by a syringe pump to clean the inner wall of the sampling needle. The needle washing scheme is simple and easy to realize, the whole sample application process only uses one part of washing liquid to wash the needle, but the amount of the washing liquid used for washing is limited, the washing liquid is washed in the same part of washing liquid for a plurality of times, impurities in the washing liquid can be increased after each washing, the impurities can be attached to the needle head, and therefore cross contamination can be caused when the sample is taken again, and the accuracy of subsequent detection is affected.
Disclosure of utility model
The application aims to provide a needle washing structure and automatic sampling equipment, which can improve the cleaning degree of a sampling needle, reduce cross infection and enable the residual index of the sampling needle to be better.
Aiming at the technical problems, the application provides the following technical scheme:
The application provides a needle washing structure, which comprises: a needle washer configured with needle wash slots distributed along a first direction, the needle wash slots configured to receive at least a portion of a sampling needle; the cleaning components are configured to be distributed along a second direction, the cleaning components are configured on one side of the needle washer, and the cleaning components are communicated with the needle washing groove so as to be used for cleaning the outer wall of the sampling needle.
In the process of the implementation, the needle washer is provided with the needle washing groove along the first direction, the cleaning component is connected with the needle washer, and the cleaning component is communicated with the needle washing groove, so that when the sampling needle is placed in the needle washing groove, firstly, the switching valve is switched to be communicated with the sampling needle after sucking the cleaning fluid through the communicated cleaning fluid and the injection pump, and the cleaning fluid is injected to clean the residual of the inner wall of the sampling needle, the movement is repeated for several times, then the switching valve is switched to be communicated with the cleaning component and the cleaning fluid is injected, and the cleaning component sprays the cleaning fluid to the outer wall of the sampling needle so as to clean the residual of the outer wall of the sampling needle.
In some embodiments, the needle wash tank includes a wash chamber and a waste chamber, the wash chamber is in communication with the waste chamber, and the needle washer is configured with the wash assembly at the wash chamber location.
In the process of the realization, the cleaning component is connected with the needle washer and corresponds to the position of the cleaning cavity, when the sampling needle needs to be cleaned, the cleaning cavity can contain the sampling needle, the sampling needle is used for cleaning the inner wall and the outer wall, waste liquid generated by cleaning is discharged out of the needle washer through the waste discharge cavity, cross infection to the sampling needle can be avoided, meanwhile, the waste liquid pipe of the switching valve can be directly connected with the waste discharge cavity, a waste discharge tee joint is not needed, the cost is saved, and the whole structure of the needle washer can be optimized due to the fact that only one needle washing groove is arranged, the processing is simple, the material cost and the processing cost are low, and the small volume is further reduced.
In some embodiments, the wash chambers are configured to be distributed along the length of the needle washer, and the waste chamber is configured to extend outside of the needle washer sidewall at a predetermined angle. The waste discharge cavity extends to the outer side of the needle washer along the preset angle, so that connection of the waste discharge cavity and the waste liquid pipe of the switching valve is facilitated, and meanwhile, infection to the outer wall of the needle washer can be avoided.
In some embodiments, the needle wash tank further comprises a needle insertion cavity disposed on a side of the wash cavity facing away from the waste discharge cavity, and the needle insertion cavity is in communication with the wash cavity.
In some embodiments, the needle inlet cavity comprises a buffer port and a needle inlet, the needle inlet is configured between the buffer port and the cleaning cavity, and the cross-sectional size of the needle inlet is smaller than the cross-sectional size of the buffer port and the cross-sectional size of the cleaning cavity.
In the process of the implementation, the buffer memory port is communicated with the needle inlet, the needle inlet is positioned between the buffer memory port and the cleaning cavity, the size of the needle inlet is smaller than that of the buffer memory port and the cleaning cavity, when the sampling needle is placed in the needle washer, the cleaning liquid is not easy to spray out in the process of cleaning the sampling needle due to the smaller size of the needle inlet, a water film can be formed at the needle inlet, and the buffer memory port can store part of the cleaning liquid, so that the cleaning liquid is prevented from overflowing the needle washing groove to damage the instrument.
In some embodiments, the aperture of the needle inlet is configured to be 1.5-3 times the outer diameter of the sampling needle.
In some embodiments, the cleaning assembly includes a cleaning element and a cleaning tube, the cleaning element being connected to the cleaning tube and the needle washer, respectively.
In some embodiments, the cleaning member comprises a cleaning port and a cleaning nozzle, the cleaning port is configured on one side of the cleaning nozzle close to the needle washing groove, the aperture of the cleaning port is smaller than that of the cleaning nozzle, the cleaning port is positioned in the needle washing device, and the cleaning nozzle is connected with the needle washing device. Through being connected the washing mouth with wasing the contact tip, and wash the mouth and be located the inside of needle washer, can form high water pressure when spraying the washing liquid, cleaning efficiency is high, also can protect the life-span of syringe pump in the time of the water conservation.
In some embodiments, the cleaning element is disposed at a distance of 1/10 to 1/8 of the upper end of the needle washer. Can conveniently wash the outer wall of sampling needle, do not stock solution, can not produce cross infection, residual index is better.
In a second aspect, the application also provides an automatic sample feeding device comprising a needle washing structure as described in any one of the above.
The automatic sample injection device provided in the embodiment of the second aspect of the present application includes the needle washing structure described in the technical solution of the first aspect, so that all technical effects of the foregoing embodiments are achieved, and are not described herein.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the embodiments of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and that other related drawings can be obtained according to these drawings without inventive effort for the users of the art.
FIG. 1 is a schematic view of a needle washing structure according to an embodiment of the present application;
FIG. 2 is an enlarged schematic view of a portion of a needle wash structure according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a needle washing structure for cleaning an inner wall of a sampling needle according to an embodiment of the present application;
Fig. 4 is a schematic diagram of a needle washing structure according to an embodiment of the present application for cleaning an outer wall of a sampling needle.
Reference numeral, 100, needle washer; 101. cleaning the cavity; 102. a waste discharge chamber; 103. a cache port; 104. a needle inlet; 200. cleaning the assembly; 201. cleaning the tube; 202. a cleaning port; 203. cleaning the joint; 300. a sampling needle.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present application described below may be combined with each other as long as they do not collide with each other.
When the chemical analysis instrument performs each analysis, the liquid sample is pumped into the flow path of the analysis instrument by the sampling needle, so that the inner wall and the outer wall of the sampling needle are stained with the sample, and if the samples remained on the inner wall and the outer wall of the sampling needle last time are not washed away in time before the next analysis is performed, the residual samples and the next sample cause cross contamination, so that the next analysis result is affected, and after each analysis is completed, the inner wall and the outer wall of the sampling needle are generally washed by a larger volume of liquid.
In the present application, the needle washing structure is used for accommodating the sampling needle 300 during washing, the needle washing structure includes the needle washer 100 and the washing component 200, the needle washer 100 is used for accommodating the sampling needle 300, the washing component 200 is configured at the outer side of the needle washer 100, so as to be used for washing the outer wall of the sampling needle 300, in the whole washing process, the sampling needle 300 is always located in the needle washer 100, and the waste liquid after washing the sampling needle 300 can be directly discharged, so that the washing time is reduced, the use efficiency is improved, and the residual index is good.
As shown in fig. 1 to 4, the present application provides a needle washing structure comprising: a needle washer 100 configured with needle wash slots distributed along a first direction and configured to receive at least a portion of a structure of a sampling needle 300; and the cleaning assemblies 200 are configured to be distributed along the second direction, the cleaning assemblies 200 are configured at one side of the needle washer 100, and the cleaning assemblies 200 are communicated with the needle washing groove for cleaning the outer wall of the sampling needle 300.
The cleaning assembly 200 is disposed outside the needle washer 100, and the cleaning assembly 200 may be detachably connected to the needle washer 100, for example, by a threaded connection, or may be fixed, and after the cleaning assembly 200 is connected to the needle washer 100, the sampling needle 300 may be cleaned by spraying in a horizontal direction, or may be cleaned by spraying at an inclined angle, so long as the outer wall of the sampling needle 300 can be cleaned.
In the above-mentioned implementation process, the needle washer 100 is configured with a needle washing groove along a first direction, the cleaning assembly 200 is connected with the needle washer 100, and the cleaning assembly 200 is communicated with the needle washing groove, so that when the sampling needle 300 is placed in the needle washing groove, firstly, after the cleaning solution is sucked in through the communicating cleaning solution and the injection pump, the switching valve is switched to the communicating sampling needle 300, and the cleaning solution is injected, so as to clean the residual of the inner wall of the sampling needle 300, the above-mentioned movements are repeated for several times, then, the switching valve is switched to the communicating cleaning assembly 200, and the cleaning solution is injected, the cleaning assembly 200 sprays the cleaning solution to the outer wall of the sampling needle 300, so as to clean the residual of the sampling needle 300, and the whole cleaning process is that the sampling needle 300 is positioned in the needle washing groove, so that the cleaning degree is improved, the cross infection is reduced, and the residual index of the sampling needle 300 is better.
Referring to fig. 1 again, the needle washing tank includes a washing chamber 101 and a waste discharging chamber 102, the washing chamber 101 is communicated with the waste discharging chamber 102, and the needle washing device 100 is provided with the washing assembly 200 at the position of the washing chamber 101. The depth of the cleaning chamber 101 may be set according to the length of the sampling needle 300, and is not particularly limited herein.
In the process of the implementation, the cleaning assembly 200 is connected with the needle washer 100 and corresponds to the position of the cleaning cavity 101, when the sampling needle 300 needs to be cleaned, the cleaning cavity 101 can accommodate the sampling needle 300, the waste liquid generated by cleaning the sampling needle 300 is discharged out of the needle washer 100 through the waste discharge cavity 102 in the process of cleaning the inner wall and the outer wall, cross infection to the sampling needle 300 can be avoided, meanwhile, the waste liquid pipe of the switching valve can be directly connected with the waste discharge cavity 102, a waste discharge tee joint is not needed, the cost is saved, and because only one needle washing groove is arranged, the volume of the needle washer 100 can be reduced, the processing is simple, the material cost and the processing cost are low, and the whole structure of the needle washing structure can be optimized more in a small volume.
In some embodiments, the cleaning chambers 101 are configured to be distributed along the length of the needle washer 100, and the waste chamber 102 is configured to extend outside the side wall of the needle washer 100 at a predetermined angle, for example, the waste chamber 102 is at an angle of greater than 90 ° and less than 180 ° to the cleaning chamber 101. By extending the waste discharge chamber 102 to the outside of the needle washer 100 along a predetermined angle, the connection of the waste discharge chamber 102 and the waste liquid tube of the switching valve is facilitated, and at the same time, the infection to the outer wall of the needle washer 100 can be avoided.
In some embodiments, the needle washing tank further comprises a needle insertion cavity, the needle insertion cavity is configured on one side of the washing cavity 101 away from the waste discharge cavity 102, for example, the needle insertion cavity is located at the upper end of the washing cavity 101, the waste discharge cavity 102 is located at the lower end of the washing cavity 101, and the needle insertion cavity is communicated with the washing cavity 101, so that the sampling needle 300 enters the washing cavity 101 through the needle insertion cavity.
As shown in fig. 1-2, the needle inlet cavity includes a buffer opening 103 and a needle inlet opening 104, the needle inlet opening 104 is disposed between the buffer opening 103 and the cleaning cavity 101, and a cross-sectional dimension of the needle inlet opening 104 is smaller than a cross-sectional dimension of the buffer opening 103 and a cross-sectional dimension of the cleaning cavity 101; illustratively, the size of the buffer port 103 gradually decreases along the direction approaching the needle inlet 104, and the size of the buffer port 103 may be smaller than the size of the cleaning chamber 101, or may be greater than or equal to the size of the cleaning chamber 101.
In the process of the implementation, the buffer memory port 103 is communicated with the needle inlet 104, the needle inlet 104 is positioned between the buffer memory port 103 and the cleaning cavity 101, the size of the needle inlet 104 is smaller than that of the buffer memory port 103 and the cleaning cavity 101, when the sampling needle 300 is put into the needle washer 100, the cleaning liquid is not easy to spray out in the process of cleaning the sampling needle 300 due to the smaller size of the needle inlet 104, a water film can be formed at the needle inlet 104, and the buffer memory port 103 can also store part of the cleaning liquid to prevent the cleaning liquid from overflowing the needle washing groove to damage the instrument.
In some embodiments, the aperture of the needle inlet 104 is configured to be 1.5-3 times the outer diameter of the sampling needle 300.
In some embodiments, the cleaning assembly 200 includes a cleaning element and a cleaning tube 201, the cleaning element being coupled to the cleaning tube 201 and the needle washer 100, respectively. The cleaning piece comprises a cleaning opening 202 and a cleaning nozzle 203, the cleaning opening 202 is configured on one side of the cleaning nozzle 203 close to the needle washing groove, the aperture of the cleaning opening 202 is smaller than that of the cleaning nozzle 203, the cleaning opening 202 is positioned inside the needle washer 100, the cleaning nozzle 203 is connected with the needle washer 100, the cleaning opening 202 is along the direction away from the cleaning nozzle 203, and the size of the cleaning opening 202 can be configured to gradually decrease. By connecting the cleaning port 202 with the cleaning nozzle 203, and the cleaning port 202 being located inside the needle washer 100, a high water pressure can be formed when the cleaning liquid is sprayed, the cleaning efficiency is high, and the service life of the syringe pump can be protected while water is saved.
In some embodiments, the cleaning element is disposed at a distance of 1/10-1/8 of the upper end of the needle washer 100. The outer wall of the sampling needle 300 can be conveniently cleaned, liquid is not stored, cross infection is avoided, and the residual index is better.
In a second aspect, the application also provides an automatic sample injection device comprising the needle washing structure.
The automatic sample injection device provided in the embodiment of the second aspect of the present application includes the needle washing structure described in the technical solution of the first aspect, so that all technical effects of the foregoing embodiments are achieved, and are not described herein.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While obvious variations or modifications are contemplated as falling within the scope of the present application.
Claims (10)
1. A needle washing structure, comprising:
A needle washer configured with needle wash slots distributed along a first direction, the needle wash slots configured to receive at least a portion of a sampling needle;
The cleaning components are configured to be distributed along a second direction, the cleaning components are configured on one side of the needle washer, and the cleaning components are communicated with the needle washing groove so as to be used for cleaning the outer wall of the sampling needle.
2. The needle washing structure according to claim 1, wherein the needle washing groove comprises a washing cavity and a waste discharging cavity, the washing cavity is communicated with the waste discharging cavity, and the needle washing device is provided with the washing component at the position of the washing cavity.
3. The needle wash structure of claim 2, wherein the wash chambers are configured to be distributed along a length of the needle wash, and the waste chamber is configured to extend outside of the needle wash sidewall along a predetermined angle.
4. The needle washing structure according to claim 2, wherein the needle washing groove further comprises a needle inlet cavity, the needle inlet cavity is arranged on one side of the washing cavity away from the waste discharging cavity, and the needle inlet cavity is communicated with the washing cavity.
5. The needle washing structure as claimed in claim 4, wherein the needle inlet cavity comprises a buffer port and a needle inlet port, the needle inlet port is arranged between the buffer port and the washing cavity, and the cross-sectional size of the needle inlet port is smaller than the cross-sectional size of the buffer port and the cross-sectional size of the washing cavity.
6. The needle washing structure according to claim 5, wherein the aperture of the needle inlet is configured to be 1.5-3 times the outer diameter of the sampling needle.
7. The needle washing structure according to claim 1, wherein the washing assembly comprises a washing member and a washing tube, and the washing member is connected with the washing tube and the needle washer, respectively.
8. The needle washing structure according to claim 7, wherein the washing member comprises a washing mouth and a washing nozzle, the washing mouth is arranged on one side of the washing nozzle close to the needle washing groove, the aperture of the washing mouth is smaller than that of the washing nozzle, the washing mouth is positioned in the needle washing device, and the washing nozzle is connected with the needle washing device.
9. The needle wash structure of claim 7, wherein the wash member is disposed at a 1/10-1/8 position from an upper end of the needle wash device.
10. An automatic sample introduction device comprising a needle wash structure as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322790050.1U CN220901306U (en) | 2023-10-18 | 2023-10-18 | Needle washing structure and automatic sampling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322790050.1U CN220901306U (en) | 2023-10-18 | 2023-10-18 | Needle washing structure and automatic sampling equipment |
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| Publication Number | Publication Date |
|---|---|
| CN220901306U true CN220901306U (en) | 2024-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322790050.1U Active CN220901306U (en) | 2023-10-18 | 2023-10-18 | Needle washing structure and automatic sampling equipment |
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| Country | Link |
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| CN (1) | CN220901306U (en) |
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2023
- 2023-10-18 CN CN202322790050.1U patent/CN220901306U/en active Active
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