Needle type online filtering device

Abstract

The utility model provides a needle type on-line filtering device which comprises a filter element placing block, a first notch and a second notch which are horizontally and transversely arranged at the upper end of the filter element placing block; the sample loading frame is arranged on the horizontal side surface of the filter element placing block and can be used for placing at least one row of test tubes which are horizontally and transversely arranged with openings facing upwards; the vertical mechanical arm is provided with a lifting seat which is located on the upper portion and can ascend and descend and a guide seat which is located on the lower portion and fixed, the lifting seat is used for fixing the upper end of a sample loading needle, and the guide seat can allow the lower end of the sample loading needle to penetrate through; the filter element is stacked in the first notch of the filter element placing block and can be connected with the sample loading needle in a tight fit manner; and the horizontal longitudinal mechanical arm can drive the filter element placing block and the sample loading frame to horizontally and longitudinally move. Therefore, the functions that the sampling needle pricks the filter element at the first notch of the filter element placing block, filters and samples in the test tube of the sampling frame, and rows the filter element at the second notch of the filter element placing block can be realized.

Description

Technical Field

[0001] The utility model relates to a fully automatic solid phase extractor used in pre-treatment instruments and equipment, and specifically relates to an automated extraction process of the fully automatic solid phase extractor in the field of food and water quality testing. The utility model is used to meet the online filtering function of samples in the field of food and water quality testing of the fully automatic solid phase extractor, and realize fully automated extraction in a true sense. Background Art

[0002] Fully automatic solid phase extraction is a commonly used sample purification and pretreatment technology, and has a series of advantages:

[0003] A. Improve analysis efficiency: The fully automatic solid phase extractor can achieve high-throughput processing of samples. Compared with manual operation, it can perform sample pretreatment fully automatically.

[0004] B. Improve analysis quality: Through enrichment and purification, interfering substances can be effectively removed, the detection limit and accuracy of the target analyte can be improved, and the interference of the sample matrix can be reduced, thereby improving the reliability of the analysis results.

[0005] C. Diverse applications: Suitable for different types of samples, including water, soil, food, biological fluids, etc., with strong applicability.

[0006] D. Reduce human errors: Through the fully automated operation process, the interference and errors caused by human operation are reduced, and the repeatability and reproducibility of the experiment are improved by precisely controlling the operating parameters.

[0007] E. Save resources: By optimizing the processing flow and precise control, the use of reagents and solvents is saved, the experimental costs are reduced, and the pollution to the environment is reduced.

[0008] From the perspective of the application of solid phase extraction in food and water sample testing, when dealing with samples containing impurities (in the field of water quality testing, samples are mainly divided into groundwater, landmark water and domestic drinking water, among which surface water contains impurities such as mud, algae, branches and leaves), impurities will cause clogging of the instrument or extraction column during sampling, resulting in sample extraction failure; in order to avoid clogging, the sample needs to be filtered manually in advance, which will affect the experimental efficiency and there will be problems with sample loss. Utility Model Content

[0009] The purpose of the utility model is to provide a needle-type online filtering device to effectively protect the valve body and the pump body and prevent the extraction column from being blocked, and can filter online to achieve full automation of the solid phase extraction process, effectively improving the efficiency of the experiment.

[0010] The technical solution adopted by the utility model is:

[0011] A needle-type online filtering device, characterized in that it comprises:

[0012] The filter element placement block has a row of first slots arranged horizontally on the upper end, and also has a row of second slots arranged horizontally on the upper end or a single second slot integrated horizontally, wherein the first slots can be used to place stacked filter elements, and the second slots can be used to collect discarded filter elements;

[0013] The sample loading rack is arranged on the horizontal side of the filter element placement block and can accommodate at least one row of test tubes arranged horizontally with their openings facing upwards;

[0014] A vertical mechanical arm is provided with a lifting seat located at the top and capable of being lifted and lowered, and a guide seat located at the bottom and fixed in position, wherein the lifting seat is used to fix the upper end of the sample loading needle, and the guide seat allows the lower end of the sample loading needle to pass through;

[0015] The filter elements are stacked in the first notch of the filter element placement block, and the inner hole of each filter element is arranged upwards, so as to be tightly connected with the sample loading needle;

[0016] The horizontal longitudinal mechanical arm can drive the filter element placement block and the sample loading rack to move horizontally and longitudinally, so that the sample loading needle is selectively aligned with the first notch, the second notch or the test tube on the sample loading rack.

[0017] In the needle-type online filtering device, the horizontal longitudinal mechanical arm is provided with a tray, on which the filter element placement block and the sample loading rack are arranged, so that the filter element placement block and the sample loading rack are displaced synchronously.

[0018] The needle-type online filtering device, wherein the filter element has a cylindrical body, and the outer diameter of the cylindrical body is smaller than the first notch and smaller than the second notch.

[0019] In the needle-type online filtering device, the end surface of the inner hole of the filter element is provided with a chamfered structure, and / or the loading needle head has a conical structure or a bevel structure.

[0020] The needle-type online filtering device, wherein a vertically arranged observation window is provided on the side of the first notch, and a line structure is provided on the surface of the observation window.

[0021] The needle-type online filtering device, wherein the end surface of the single second notch integrated into one body along the horizontal lateral direction is an oblong shape and is provided with a chamfered structure.

[0022] The needle-type online filtering device does not have a sample rack, and the filter element placement block has at least three rows of slot structures, one row for placing unused filter elements, another row for placing discarded filter elements, and the remaining row for placing the test tubes.

[0023] In the needle-type online filtering device, the filter element placement block is made of PP, PEEK, POM or aluminum alloy material.

[0024] The needle-type online filtering device, wherein the filter element is formed by processing with PP material or PE material.

[0025] The needle-type online filtering device, wherein the head of the filter element has a conical structure.

[0026] The advantage of the utility model is that it can effectively filter food or water samples without affecting the flow rate, and can fully realize the automated solid phase extraction process. Compared with the sampling method of other products, this utility model has high experimental efficiency, is not easy to block pipelines and precision devices such as solenoid valves, and has the advantages of simpler and more compact overall product structure, simple manufacturing process, good structural stability, easy operation, etc. It is conducive to modular design and has good expansion and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a stereogram of the utility model.

[0028] Figure 2 It is a cross-sectional view of the filter element.

[0029] Figure 3 It is a cross-sectional view of the utility model.

[0030] Figure 4 It is a front view of the utility model.

[0031] Figure 5 is a cross-sectional view of the loading needle.

[0032] Figure 6 It is a three-dimensional diagram of the filter element placement block.

[0033] Figure 7 It is a schematic diagram of a filter-loading tip centrifuge tube with a conical head structure.

[0034] Explanation of the reference numerals: 1 - filter element placement block; 2 - filter element; 3 - sample loading needle; 4 - vertical robotic arm; 5 - horizontal longitudinal robotic arm; 6 - sample loading rack; 7 - test tube; 8 - pointed centrifuge tube. DETAILED DESCRIPTION

[0035] like Figure 1-Figure 5 As shown, the utility model provides a needle-type online filtering device, comprising:

[0036] The filter element placement block 1 has a row of first notches 101 arranged horizontally at the upper end, and also has a single second notch 102 integrated into one along the horizontal transverse direction (it can also be replaced by a row of second notches 102 arranged horizontally), the first notch 101 is a cylindrical inner hole, which can be used to place the stacked filter elements 2, and the aperture of the cylindrical inner hole is larger than the outer diameter of the filter element; an observation window 104 arranged vertically is provided at the side position of the first notch 101, and a scoreline structure 105 is provided on the surface of the observation window 104, which is used to accurately observe the position and remaining amount of the filter element 2 in each first notch 101; the end face of the second notch 102 is an oblong and is provided with a chamfer structure 103, such a structure can better increase the receiving range when collecting the discarded filter element 2, and prevent the filter element 2 from being discharged to the outside;

[0037] The filter element 2 is stacked in the first notch 101 of the filter element placement block 1; each filter element 2 has a cylindrical main body 201, the outer diameter of the cylindrical main body 201 is smaller than the first notch 101, and smaller than the second notch 102, the filter element 2 is provided with an inner hole structure 202, which can be tightly connected with the sample loading needle 3 to ensure that the filter element 2 can be lifted up when the sample loading needle 3 pierces the filter element 2; the end face of the inner hole 202 of the filter element 2 is provided with a chamfered structure 203, when it is pierced and installed with the conical structure 301 at the head of the sample loading needle 3, it can play a good guiding role to avoid the problem of the sample loading needle 3 being pierced off.

[0038] The sample loading rack 6 is arranged on the horizontal side of the filter element placement block 1, and can accommodate at least one row of test tubes 7 arranged horizontally with their openings facing upwards;

[0039] The vertical mechanical arm 4 is fixed on the bottom plate and can drive a row of sample loading needles 3 arranged horizontally to move vertically; specifically, the vertical mechanical arm 4 is provided with a lifting seat 401 located at the top and capable of being lifted and lowered, and a guide seat 402 located at the bottom and fixed in position, the lifting seat 401 is used to fix the upper end of the sample loading needle 3, and the guide seat 402 is used for the lower end of the sample loading needle 3 to pass through, and the lifting seat 401 is driven by a motor at the top and can move vertically, thereby driving the sample loading needle 3 to perform vertical lifting and lowering movements; in addition to being able to control the verticality of the sample loading needle 3, the guide seat 402 can also play a role in blocking the filter element 2 downwards, and when the sample loading needle 3 rises, the filter element 2 is blocked at the lower end of the guide seat 402, so that the filter element 2 is separated from the sample loading needle 3;

[0040] The horizontal longitudinal robotic arm 5 is installed on the base plate, and can drive the filter element placement block 1 and the sample loading rack 6 to move horizontally and longitudinally, so that the sample loading needle 3 is selectively aligned with the first slot 101, the second slot 102 or the test tube 7 on the sample loading rack 6; more specifically, the horizontal longitudinal robotic arm 5 is provided with a tray 501, and the filter element placement block 1 and the sample loading rack 6 are arranged on the tray 501, so that the filter element placement block 1 and the sample loading rack 6 are displaced synchronously.

[0041] With the above structure, the sample needle 3 can pierce the filter element 2 at the first notch 101 of the filter element placement block 1, filter and sample in the test tube 7 of the sample loading rack 6, and arrange the filter element at the second notch 102 of the filter element placement block 1.

[0042] That is, the utility model provides a needle-type online filtering method:

[0043] Before the solid phase extractor is operated, the filter element 2 is placed with the inner hole facing upwards into the first notch 101 of the filter element placement block 1 to fill all the channels;

[0044] After the solid phase extractor is started, the horizontal longitudinal mechanical arm 5 is operated to align the position of the first notch 101 of the filter element placement block 1 with the position of the sample loading needle 3; the vertical mechanical arm 4 is moved to control the sample loading needle 3 to move downward to pierce the filter element 2; the vertical mechanical arm 4 is moved upward, and the sample loading needle 3 moves upward with the filter element 2, so that the horizontal and longitudinal movements of the filter element 2 will not interfere with each other;

[0045] The horizontal longitudinal mechanical arm 5 operates to align the test tube 7 of the sample loading rack 6 with the sample loading needle 3; the vertical mechanical arm 4 moves to insert the sample loading needle 3 with the filter element 2 into the test tube 7 for filtering and loading; after loading, the vertical mechanical arm 4 moves upward, and the sample loading needle 3 moves upward with the filter element 2, so that the horizontal and longitudinal movements of the filter element 2 will not interfere;

[0046] The horizontal longitudinal mechanical arm 5 operates to align the second notch 102 of the filter element placement block 1 with the sample loading needle 3, and the vertical mechanical arm 4 moves upward, so that the filter element 2 is blocked by the guide seat 402 of the vertical mechanical arm 4, and the filter element 2 is separated from the sample loading needle 3 and falls into the second notch 102 of the filter element placement block 1, thereby realizing the function of discarding the filter element;

[0047] Repeat the previous actions until the samples in all the test tubes 7 of the sample rack 6 are filtered and loaded; after completing the entire experimental process, remove the filter element placement block 1 and take out the discarded filter element 2.

[0048] In addition to the two-row slot structure, the filter element placement block 1 described in the above embodiment can actually also adopt a three-row slot structure, one row for placing test tubes 7, another row for placing filter elements 2, and the third row for placing discarded filter elements 2. In this case, the sample rack 6 may no longer be arranged.

[0049] The filter element placement block 1 is preferably made of PP material, which has good corrosion resistance and low material cost. It can also be made of PEEK, POM, aluminum alloy and other materials.

[0050] The filter element 2 preferably adopts a cylindrical structure with holes, and can also adopt a conical structure at the head. Figure 7 ) can also ensure complete sample loading and avoid sample waste.

[0051] The inner hole of the filter element 2 preferably adopts a cylindrical hole structure, but in fact, a polygonal hole structure may also be adopted.

[0052] The head of the loading needle 3 may have a bevel structure in addition to a conical structure, which can also play a good guiding role.

[0053] The loading needle 3 is preferably formed by processing with 316L material, and may also be formed by a structure of stainless steel and sprayed with Teflon.

[0054] The filter element 2 is preferably formed by PP material or PE material.

Claims

1. A needle-type online filter device, characterized in that: include: The filter element placement block has a row of first slots arranged horizontally on the upper end, and also has a row of second slots arranged horizontally on the upper end or a single second slot integrated horizontally, wherein the first slots can be used to place stacked filter elements, and the second slots can be used to collect discarded filter elements; The sample loading rack is arranged on the horizontal side of the filter element placement block and can accommodate at least one row of test tubes arranged horizontally with their openings facing upwards; A vertical mechanical arm is provided with a lifting seat located at the top and capable of being lifted and lowered, and a guide seat located at the bottom and fixed in position, wherein the lifting seat is used to fix the upper end of the sample loading needle, and the guide seat allows the lower end of the sample loading needle to pass through; The filter elements are stacked in the first notch of the filter element placement block, and the inner hole of each filter element is arranged upwards, so as to be tightly connected with the sample loading needle; The horizontal longitudinal mechanical arm can drive the filter element placement block and the sample loading rack to move horizontally and longitudinally, so that the sample loading needle is selectively aligned with the first notch, the second notch or the test tube on the sample loading rack.

2. The needle-type in-line filter device according to claim 1, characterized in that: The horizontal longitudinal mechanical arm is provided with a tray, on which the filter element placement block and the sample loading rack are arranged, so that the filter element placement block and the sample loading rack are displaced synchronously.

3. The needle-type in-line filter device according to claim 1, characterized in that: The filter element has a cylindrical body, and the outer diameter of the cylindrical body is smaller than the first notch and smaller than the second notch.

4. The needle-type in-line filter device according to claim 1, characterized in that: The end surface of the inner hole of the filter element is provided with a chamfered structure, and / or the loading needle head has a conical structure or a bevel structure.

5. The needle-type in-line filter device according to claim 1, characterized in that: An observation window arranged vertically is provided on the side of the first notch, and a line structure is provided on the surface of the observation window.

6. The needle-type in-line filter device according to claim 1, characterized in that: The end surface of the single second notch integrated into one piece along the horizontal lateral direction is an oblong shape and is provided with a chamfer structure.

7. The needle-type in-line filter device according to claim 1, characterized in that: No sample rack is arranged, and the filter element placement block has at least three rows of slot structures, one row of which is used to place unused filter elements, another row is used to place discarded filter elements, and the remaining row is used to place the test tubes.

8. The needle-type in-line filter device according to claim 1, characterized in that: The filter element placement block is made of PP, PEEK, POM or aluminum alloy material.

9. The needle-type in-line filter device according to claim 1, characterized in that: The filter element is formed by using PP material or PE material.

10. The needle-type in-line filter device according to claim 1, characterized in that: The head of the filter element has a conical structure.

Images