Multi-channel filtering device for needle type filter

Abstract

The utility model discloses a multi-channel filtering device for a needle type filter, which is characterized by comprising a porous upper supporting plate and a porous lower supporting plate positioned below the porous upper supporting plate, and a plurality of uniformly distributed stepped through holes for placing the filter are formed in the porous upper supporting plate; a plurality of sample introduction bottle positioning grooves corresponding to the stepped through holes are formed in the porous lower supporting plate; the two sides of the bottom of the porous upper supporting plate are symmetrically provided with at least one supporting column, and the two side edges of the porous lower supporting plate are each provided with a supporting column positioning groove which is used for being matched with the supporting column in an inserted mode and provided with a semi-opening. Guide sliding grooves allowing the porous upper supporting plate to horizontally move out of the porous lower supporting plate from the supporting column positioning grooves are formed in the porous lower supporting plate and located between the adjacent stepped through holes, one side of each guide sliding groove is communicated with the corresponding supporting column positioning groove with an inward opening, and the filter has the advantages that the number of filtered samples at a time is large, the filtering efficiency is high, and cross contamination of the filtered samples is avoided.

Description

Technical Field

[0001] The utility model relates to a multi-channel filtering device, in particular to a multi-channel filtering device used for a needle filter. Background Art

[0002] In analytical chemistry, liquid chromatographs, ion chromatographs and other precision instruments need to be filtered with a needle filter before sampling, otherwise it is easy to cause clogging of the chromatographic column, shorten the service life of the chromatographic column, and may also bring in a large amount of interfering substances. The needle filter is a commonly used laboratory equipment, mainly used for the clarification and sterilization of small volume liquid samples, and is widely used in chemical analysis, biotechnology, pharmaceutical research and development and other fields. The needle filter includes a syringe, and the front end of the syringe is connected to a filter. The filtering method is to inhale the sample with a syringe, connect the filter, and manually pressurize the liquid to pass through the filter membrane of the filter and enter the injection bottle to complete the filtration of a sample. When the number of samples is large, it will be found that this one-by-one filtration is time-consuming, labor-intensive, and inefficient, and the injection bottles are easily overturned when they are taken to the precision instrument one by one.

[0003] The invention patent is named as a multi-channel needle filter device (CN101733175A), which discloses that the device includes a syringe and a filter, and also includes a positioning slot plate and an injection bottle seat plate. The positioning slot plate is provided with a positioning bracket and two rows of syringe positioning slots, each row of which has 5 to 15 syringe positioning slots, and the syringe positioning slots are U-shaped grooves. The syringe is embedded in the syringe positioning slot, and the injection bottle seat plate is provided with positioning slots and at least two rows of injection bottle seats corresponding to the syringe positioning slots, and the positioning bracket is plugged into the positioning slots; the device can realize the filtering of many samples at the same time, and the filtering is time-saving and labor-saving with high efficiency, but the syringe needs to be embedded in the U-shaped groove, and the installation and removal efficiency is low; and only two rows of injection bottles can be filtered in one operation, and the number of one-time filtration is limited; in addition, in the process of taking and placing the positioning slot plate, it is easy to cause the risk of cross-contamination between the liquid at the outlet of the filter and other injection bottles. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a multi-channel filtering device for a needle filter which has the advantages of large one-time filtering quantity, high filtering efficiency and avoiding cross contamination of filtered samples.

[0005] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a multi-channel filtering device for a needle filter, comprising a porous upper support plate and a porous lower support plate located below the porous upper support plate, the porous upper support plate is provided with a plurality of evenly distributed stepped through holes for placing the filter, and the porous lower support plate is provided with a plurality of injection bottle positioning grooves corresponding to the stepped through holes; at least one supporting column is symmetrically arranged on both sides of the bottom of the porous upper support plate, and both sides of the porous lower support plate are respectively provided with half-open supporting column positioning grooves for plugging and cooperating with the supporting columns, and a guide slide groove for horizontally moving the porous upper support plate out of the porous lower support plate from the supporting column positioning groove is provided on the porous lower support plate and between adjacent stepped through holes, and one side of the guide slide groove is connected to the supporting column positioning groove opening inward.

[0006] Preferably, the aperture of the upper large hole of the stepped through hole is larger than the maximum diameter of the filter, and the aperture of the lower small hole of the stepped through hole is smaller than the maximum diameter of the filter.

[0007] Preferably, there are two support columns and they are circular, the support column positioning groove is semicircular, the opening end of the support column positioning groove opening inward is connected to the side of the guide slide groove, and the opening end of the support column positioning groove on the other side is open outward.

[0008] Preferably, the height of the support column is 2-3 mm less than the sum of the heights of the filter and the injection bottle. The filter head just enters the mouth of the collection vial by 2-3 mm, and the air pressure in the collection bottle will not be increased.

[0009] Preferably, horizontal handles are provided on both sides of the porous upper support plate to facilitate horizontal movement operation.

[0010] Preferably, the stepped through holes are arranged in 4-6 rows and 10-12 columns, and the injection bottle positioning grooves are all provided with numbers or coordinate marks.

[0011] Preferably, the upper hole of the stepped through hole is trumpet-shaped, so as to facilitate the taking and placing of the filter.

[0012] Preferably, the bottom of the support column positioning groove and the bottom of the guide slide groove are located in the same horizontal plane and have a depth of 2 to 3 cm.

[0013] Compared with the prior art, the advantages of the utility model are:

[0014] 1. Improve efficiency and throughput: By setting multiple evenly distributed and uniformly sized stepped through holes on the porous upper support plate, multiple samples can be filtered at the same time, which greatly improves the efficiency and throughput of the experiment and is suitable for laboratory research or production environments that require a large number of sample processing.

[0015] 2. Easy to operate and assemble: The plug-in design of the support column and the support column positioning groove simplifies the assembly process of the device. The user can quickly and accurately align and install the porous upper support plate and the porous lower support plate, reducing the possibility of operational errors. Through the filter head positioning, it is very convenient to place and remove the syringe filter, which improves the convenience of operation.

[0016] 3. Enhanced stability and accuracy: The design of the guide chute provides precise guidance for the separation and withdrawal of the porous upper support plate from the porous lower support plate, avoiding sample loss or contamination caused by shaking or misalignment of the device, and improving the accuracy of the experiment.

[0017] In summary, the utility model is a multi-channel filtering device for needle filters, which, through its sophisticated design, effectively improves the experimental efficiency, ensures the reliability and repeatability of the experimental results, simplifies the operating process, enhances the stability and practicality of the device, and is an ideal tool for large-scale sample pretreatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of a multi-channel filtering device for a needle filter of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the multi-hole lower support plate of the utility model;

[0021] Figure 3 This is a schematic diagram of the connection structure of the filter of the utility model. DETAILED DESCRIPTION

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0024] In the description of the embodiments of the present utility model application, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "end", "side", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model application. Specific embodiments

[0026] A multi-channel filtration device for a needle filter, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes a porous upper support plate 1 and a porous lower support plate 2 located below the porous upper support plate 1, the porous upper support plate 1 is provided with a plurality of evenly distributed stepped through holes 4 for placing filters 3, and the porous lower support plate 2 is provided with a plurality of injection bottle positioning grooves 5 corresponding to the stepped through holes 4; at least one support column 6 is symmetrically arranged on both sides of the bottom of the porous upper support plate 1, and both sides of the porous lower support plate 2 are respectively provided with half-open support column positioning grooves 7 for plugging and cooperating with the support columns 6, and a guide groove 8 for the porous upper support plate 1 to be horizontally moved out of the porous lower support plate 2 from the support column positioning groove 7 is provided on the porous lower support plate 2 and between adjacent stepped through holes 4, and one side of the guide groove 8 is connected with the support column positioning groove 7 with an opening facing inward.

[0027] In this specific embodiment, the aperture of the upper large hole of the stepped through hole 4 is larger than the maximum diameter of the filter 3, and the aperture of the lower small hole of the stepped through hole 4 is smaller than the maximum diameter of the filter 3. There are two support columns 6 and they are circular, and the support column positioning groove 7 is semicircular. The open end of the support column positioning groove 7 facing inward is connected to the side of the guide chute 8, and the open end of the support column positioning groove 7 on the other side is open outward. The height of the support column 6 is 2 to 3 mm less than the sum of the heights of the filter 3 and the injection bottle 9. The filter head of the filter 3 just enters the mouth of the injection bottle 9 by 2 to 3 mm, and the air pressure in the injection bottle 9 will not be increased. Horizontal handles 11 are provided on both sides of the porous upper support plate 1. The stepped through holes 4 are arranged in 5 rows and 10 columns, and the injection bottle positioning grooves 5 are all provided with numbers or coordinate marks, 1-50, to reduce confusion. The upper hole of the stepped through hole 4 is trumpet-shaped. The bottom of the support column positioning groove 7 and the bottom of the guide chute 8 are located at the same horizontal plane and the depth is 2 to 3 cm.

[0028] The specific steps are as follows:

[0029] 1. Place the sample injection bottle 9 for collecting the filtrate in the sample injection bottle positioning groove 5 of the porous lower support plate 2. Each sample injection bottle positioning groove 5 is marked with a number, and 50 holes are used as an example to place a 1.5 mL universal sample injection bottle 9.

[0030] 2. Fix the four support columns 6 at the bottom of the porous upper support plate 1 in the support column positioning grooves 7 of the porous lower support plate 2. The left support column positioning groove 7 is connected to a guide groove 8 of the same 5MM depth, and the right support column positioning groove 7 has a 5mm gap to the right.

[0031] 3. Assemble the syringe 10 and the filter 3, and place them in the stepped through hole 4 of the porous upper support plate 1. The bottom of the stepped through hole 4 supports the edge of the filter 3, and the head of the filter 3 completely passes through the porous upper support plate 1, and the filter head of the filter 3 just enters the mouth of the injection bottle 9 by 2 to 3 mm, so that the head of the filter 3 is very close to the bottle mouth, but does not cover the bottle mouth, to avoid the increase of air pressure in the injection bottle 9 (if the filter 3 is completely placed on the bottle mouth, it is easy to cause the positive air pressure in the bottle to increase, and the liquid is discharged from the bottle mouth, but the filtrate cannot be collected); add the liquid to be filtered into the corresponding syringe, insert the piston of the syringe 10, and drip the pressurized liquid into the injection bottle 9 to complete the filtration.

[0032] 4. Lift the porous upper support plate 1 vertically by 15 mm, move it horizontally to the right into the guide chute 8 to a right angle, and continue to move horizontally toward the inner chest until the porous upper support plate 1 completely leaves the porous lower support plate 2, effectively preventing residual droplets from the filter head from entering other sample injection bottles 9 and causing cross contamination.

[0033] 5. Turn the porous upper support plate 1 over and dump all the syringes 10 and filters 3 into the trash can at one time.

[0034] The above description is not intended to limit the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by a person skilled in the art within the essential scope of the present invention shall also fall within the protection scope of the present invention.

Claims

1. A multi-channel filtering device for a needle filter, characterized in that: It includes a porous upper support plate and a porous lower support plate located below the porous upper support plate, the porous upper support plate is provided with a plurality of evenly distributed stepped through holes for placing filters, and the porous lower support plate is provided with a plurality of injection bottle positioning grooves corresponding to the stepped through holes; at least one support column is symmetrically provided on both sides of the bottom of the porous upper support plate, and both sides of the porous lower support plate are respectively provided with half-open support column positioning grooves for plugging and cooperating with the support columns, and a guide groove for horizontally moving the porous upper support plate out of the porous lower support plate from the support column positioning groove is provided on the porous lower support plate and between adjacent stepped through holes, and one side of the guide groove is connected with the support column positioning groove opening inward.

2. A multi-channel filtering device for a needle filter according to claim 1, characterized in that: The aperture of the upper large hole of the stepped through hole is larger than the maximum diameter of the filter, and the aperture of the lower small hole of the stepped through hole is smaller than the maximum diameter of the filter.

3. A multi-channel filtering device for a needle filter according to claim 1, characterized in that: There are two circular support columns, the support column positioning groove is semicircular, the inwardly-opening end of the support column positioning groove is connected to the side of the guide slide groove, and the other side of the support column positioning groove is open outward.

4. A multi-channel filtering device for a needle filter according to claim 1, characterized in that: The height of the support column is 2-3 mm less than the sum of the heights of the filter and the injection bottle.

5. The multi-channel filtering device for a needle filter according to claim 1, characterized in that: Horizontal handles are arranged on both sides of the porous upper support plate.

6. A multi-channel filtering device for a needle filter according to claim 1, characterized in that: The stepped through holes are arranged in 4-6 rows and 10-12 columns, and the injection bottle positioning grooves are all provided with numbers or coordinate marks.

7. A multi-channel filtering device for a needle filter according to claim 6, characterized in that: The upper hole of the stepped through hole is in a trumpet shape.

8. The multi-channel filtering device for a needle filter according to claim 1, characterized in that: The bottom of the support column positioning groove and the bottom of the guide slide groove are located in the same horizontal plane and the depths of both are 2 to 3 cm.

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