CN216726119U

CN216726119U - Needle type filter supporting and positioning frame

Info

Publication number: CN216726119U
Application number: CN202123218222.5U
Authority: CN
Inventors: 朱海强; 曹国洲; 孙菡波; 周敏雁
Original assignee: NINGBO ACADEMY OF SCIENCE AND TECHNOLOGY FOR INSPECTION AND QUARANTINE; Ningbo Customs Technology Center; Ningbo Joysun Testing Service Co ltd
Current assignee: NINGBO ACADEMY OF SCIENCE AND TECHNOLOGY FOR INSPECTION AND QUARANTINE; Ningbo Customs Technology Center; Ningbo Joysun Testing Service Co ltd
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2022-06-14
Anticipated expiration: 2031-12-20

Abstract

The utility model discloses a needle type filter supports locating rack, enclose frame, support curb plate and clamp plate including the location, the support curb plate has two, and two support curb plate relatively fixed enclose the terminal surface of frame upper end both sides in the location on, and two spaces between the support curb plate form observation window, the clamp plate is located the locating frame, and the both sides side of clamp plate and the medial surface laminating of support curb plate, the both sides of clamp plate are equipped with limit slider, are equipped with spacing breach on the support curb plate, limit slider be located spacing breach and with spacing breach sliding fit, and limit slider exposes in the support curb plate, is equipped with needle type filter locating hole on the clamp plate, needle type filter locating hole is big-end-up's ladder through-hole, the big footpath hole diameter in the needle type filter locating hole and the shell diameter looks adaptation of needle type filter. The utility model discloses simple structure, convenient to use, laborsaving are favorable to improving sample solution filtration efficiency, and is particularly suitable for filtering large batch sample solution.

Description

Needle type filter supporting and positioning frame

Technical Field

The utility model belongs to the technical field of the SPE technique and specifically relates to a pin filter supports locating rack is related to.

Background

Solid-Phase Extraction (SPE) is a sample pretreatment technology developed in recent years, is developed by combining a liquid-Solid Extraction column and a liquid chromatography technology, is mainly used for separating, purifying and concentrating samples, can improve the recovery rate of analytes compared with the traditional liquid-liquid Extraction method, more effectively separates the analytes from interfering components, reduces the sample pretreatment process, and is simple to operate, time-saving and labor-saving.

The more common method for SPE is to pass a liquid sample solution through an adsorbent to retain the substance to be tested, then to wash out impurities with a solvent of appropriate strength, then to rapidly elute the substance to be tested with a small amount of solvent, to collect the eluate (sample solution) containing the substance to be tested (component to be tested) in a test tube or a centrifuge tube, and to inject the sample solution into a chromatographic sample introduction bottle. In HPLC analysis, the column packing is small in size and easily clogged with foreign particles, so that the sample solution needs to be filtered to remove particle contaminants and protect the instrument.

At present, a sample solution is sucked into an injector, a needle filter is used for inserting a liquid inlet of the needle filter into a connector of the injector, a liquid outlet of the needle filter is aligned with a bottle mouth of a chromatographic sample feeding bottle and inserted into the chromatographic sample feeding bottle, the bottom surface of a shell of the needle filter is placed on the bottle mouth of the chromatographic sample feeding bottle, finally a push rod of the injector is pressed down, and the filtered sample solution is injected into the chromatographic sample feeding bottle on a sample feeding bottle rack and then the injector is taken away. The method has the following defects: the liquid outlet head of the needle type filter is inserted into the chromatographic sample injection bottle only after the liquid outlet head of the needle type filter is aligned with the bottle mouth of the chromatographic sample injection bottle, so that the operation is inconvenient; in addition, when the sample solution is in a large quantity and needs to be filtered in a large batch, a plurality of different needle filters are needed to be used, and the filtration is performed every time'; the filtration is performed by inserting a needle filter into the connector of the syringe (frequently taking the needle filter), so that the efficiency of filtering and collecting the sample solution is low.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a solve current pin filter awkward problem, provide a simple structure, convenient to use, laborsaving is favorable to improving sample solution filtration efficiency, is particularly suitable for carrying out filterable pin filter support locating rack to large batch sample solution.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a needle type filter supports locating rack, includes location enclosure, support curb plate and clamp plate, the support curb plate has two, and two support curb plates relatively fix on the terminal surface of location enclosure upper end both sides, and the space between two support curb plates forms observation window, the clamp plate is located the posting, and the both sides side of clamp plate is laminated with the medial surface of support curb plate, and the both sides of clamp plate are equipped with limiting slide block, are equipped with spacing breach on the support curb plate, limiting slide block is located spacing breach and with spacing breach sliding fit, and limiting slide block exposes in the support curb plate, is equipped with needle type filter locating hole on the clamp plate, needle type filter locating hole is big-end-up's ladder through-hole, and the major diameter hole diameter in the needle type filter locating hole and the shell diameter looks adaptation of needle type filter. The utility model is used in cooperation with the sample feeding bottle frame, and when in use, the positioning surrounding frame is sleeved outside the sample feeding bottle frame, so that the sample feeding bottle frame and the positioning surrounding frame are kept relatively fixed; the chromatographic sample feeding bottle is inserted into the jack on the sample feeding bottle rack, the side surfaces of two sides of the pressure plate are attached to the inner side surface of the supporting side plate, and the limiting slide block is matched with the limiting notch, so that the pressure plate is horizontally limited, the position of the jack on the sample feeding bottle rack can be accurately corresponding to the position of the pin filter positioning hole on the pressure plate, the pin filter is accommodated and placed in the large-diameter hole of the pin filter positioning hole, the small-diameter hole of the pin filter positioning hole is used for allowing a liquid outlet head of the pin filter to pass through, and the diameter of the small-diameter hole of the pin filter positioning hole is smaller than that of the bottle mouth of the chromatographic sample feeding bottle, so that the pressure plate can be stably placed on the bottle mouth of the chromatographic sample feeding bottle; when a large amount of sample solution is to be filtered, a chromatographic sample injection bottle is inserted into an insertion hole on a sample injection bottle frame, a pressing plate is placed between supporting side plates, a limiting sliding block is clamped into a limiting notch, the pressing plate is loosened to enable the pressing plate to slide down to the bottle mouth of the chromatographic sample injection bottle, the positioning holes of needle filters are aligned with the bottle mouth of the chromatographic sample injection bottle below one by one, then when the needle filters are placed in the positioning holes of the needle filters, liquid outlet heads of the needle filters penetrate through the positioning holes of the needle filters to extend into the chromatographic sample injection bottle below, and finally, a syringe which is sucked with the sample solution to be filtered is directly inserted into a connecting head of the needle filters, and a push rod is pushed to filter; the needle type filters can be placed in the positioning holes of the needle type filters in advance, the needle type filters extend into the chromatographic sample feeding bottles below, and during filtering, filtration can be carried out as long as the syringe connectors sucking sample solutions to be filtered are directly inserted into the liquid inlet heads of the needle type filters, so that the liquid outlet heads of the needle type filters are not required to be aligned with the openings of the chromatographic sample feeding bottles, the needle type filters are prevented from being frequently taken and installed, the use is very convenient, and the needle type filters are very suitable for filtering large batches of sample solutions; after filtration, the needle type filter can be taken away along with the injector, the chromatogram sampling bottle which is positioned below the needle type filter positioning hole without the needle type filter is the chromatogram sampling bottle which is injected with the sample solution, whether the needle type filter is arranged in the needle type filter positioning hole or not can be directly judged by observing whether the needle type filter is arranged in the needle type filter positioning hole or not through naked eyes, and the sample solution can be prevented from being repeatedly injected into the chromatogram sampling bottle or the chromatogram sampling bottle is omitted.

Preferably, the positioning enclosure frame is a rectangular frame formed by enclosing four side plates.

Preferably, the supporting side plate and the positioning surrounding frame are of a homogeneous and integral structure.

Preferably, a gripping transverse bar is arranged on the outer side surface of the positioning surrounding frame. The grabbing cross bar is used for grabbing by hands so as to facilitate the taking and placing of the positioning enclosure.

Preferably, a guide inclined plane is arranged at the opening of the large-diameter hole in the positioning hole of the needle type filter. The guide inclined plane plays a role in guiding, so that the needle type filter can be accurately and quickly placed into the positioning hole of the needle type filter.

Preferably, the limiting sliding block and the pressing plate are of a homogeneous and integrated structure.

Therefore, the utility model discloses following beneficial effect has:

(1) the needle filters can be placed in the positioning holes of the needle filters, and during filtering, filtering can be performed as long as the syringe connector sucking the sample solution to be filtered is directly inserted into the liquid inlet head of the needle filters, so that the liquid outlet head of the needle filters does not need to be aligned with the opening of the chromatographic sample feeding bottle, frequent taking and installation of the needle filters are avoided, the use is very convenient, and the needle filters are very suitable for filtering large batches of sample solutions;

(2) whether the needle filter is arranged in the positioning hole of the needle filter or not can be observed by naked eyes, whether the corresponding chromatographic sampling bottle below is filled with the sample solution or not can be directly judged, and the phenomenon that the sample solution is repeatedly filled into the chromatographic sampling bottle or the chromatographic sampling bottle is omitted can be avoided.

Drawings

Fig. 1 is a half sectional view of the utility model in use.

Fig. 2 is a top view of the positioning enclosure.

FIG. 3 is a top view of the platen.

Fig. 4 is an enlarged view at a in fig. 1.

In the figure: the device comprises a positioning surrounding frame 1, a supporting side plate 2, a pressing plate 3, an observation window 4, a limiting slide block 5, a limiting notch 6, a needle type filter positioning hole 7, a grasping cross bar 8, a guide inclined plane 8, a needle type filter 9, a chromatogram sample injection bottle 10 and a sample injection bottle rack 11.

Detailed Description

The invention is further described with reference to the accompanying drawings and the detailed description.

As shown in figure 1, the needle type filter supporting and positioning frame comprises a positioning surrounding frame 1, two supporting side plates 2 and a pressing plate 3, wherein the positioning surrounding frame is a rectangular frame formed by surrounding four side plates, symmetrical grabbing transverse strips 8 are arranged on the outer side surface of the positioning surrounding frame, the two supporting side plates are oppositely fixed on the end surfaces of the two sides of the upper end of the positioning surrounding frame, the two supporting side plates and the positioning surrounding frame are of a homogeneous integral structure, the supporting side plates and the positioning surrounding frame are acrylic plates, a space between the two supporting side plates forms an observation window 4, the pressing plate is positioned in the positioning frame, the pressing plate is an acrylic plate, the side surfaces of the two sides of the pressing plate are attached to the inner side surfaces of the supporting side plates, two sides of the pressing plate are protruded to form limiting sliding blocks 5, the supporting side plates are provided with limiting notches 6 (shown in figure 2), the limiting sliding blocks are positioned in the limiting notches and are matched with the limiting notches in a sliding manner, and the limiting sliding blocks are exposed out of the supporting side plates, the pressing plate is provided with a pin type filter positioning hole 7 (shown in figure 3), the pin type filter positioning hole is a stepped through hole with a large upper part and a small lower part, a guide inclined plane 9 is arranged at the opening of a large-diameter hole in the pin type filter positioning hole, and the diameter of the large-diameter hole in the pin type filter positioning hole is matched with the diameter of a shell of the pin type filter.

The utility model discloses a use method does: inserting a chromatographic sample feeding bottle 10 into an insertion hole (shown in figure 4) on a sample feeding bottle rack 11, placing a pressing plate between supporting side plates, clamping a limiting slide block into a limiting notch, loosening the pressing plate to enable the pressing plate to slide down to the bottle mouth of the chromatographic sample feeding bottle, aligning a needle type filter positioning hole with the bottle mouth of the chromatographic sample feeding bottle below one by one, then placing a needle type filter 9 in the needle type filter positioning hole, enabling a liquid outlet head of the needle type filter to penetrate through the needle type filter positioning hole to extend into the chromatographic sample feeding bottle below, directly inserting an injector sucking a sample solution to be filtered into a connecting head of the needle type filter during filtering, and pushing a push rod to filter; and after filtering, taking away the injector, taking away the needle filter in the positioning hole of the needle filter along with the injector, repeating the operation until the sample solution is injected into the chromatographic sample injection bottle on the sample injection bottle rack, and taking away the pressing plate.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.

Claims

1. A needle type filter supporting and positioning frame is characterized by comprising a positioning surrounding frame (1), a supporting side plate (2) and a pressing plate (3), the two supporting side plates are oppositely fixed on the end surfaces of the two sides of the upper end of the positioning surrounding frame, an observation window (4) is formed in the space between the two supporting side plates, the pressing plate is positioned in the positioning frame, the side surfaces of the two sides of the pressing plate are attached to the inner side surface of the supporting side plate, the two sides of the pressing plate are provided with limiting slide blocks (5), the supporting side plate is provided with limiting notches (6), the limiting slide blocks are positioned in the limiting notches and are in sliding fit with the limiting notches, the limiting slide block is exposed out of the supporting side plate, a needle type filter positioning hole (7) is arranged on the pressing plate, the needle type filter positioning hole is a stepped through hole with a large upper part and a small lower part, and the diameter of the large-diameter hole in the needle type filter positioning hole is matched with the diameter of the shell of the needle type filter.

2. The filter-on-needle support positioning frame according to claim 1, wherein the positioning frame is a rectangular frame formed by surrounding four side plates.

3. The needle filter support retainer of claim 1, wherein the support side plate and the retainer enclosure are of a homogenous one-piece construction.

4. A pin filter support retainer according to claim 1, 2 or 3, wherein the retaining surround is provided with gripping rails (8) on the outer side.

5. A pin filter support retainer according to claim 1, wherein the large diameter hole opening in the pin filter retainer hole is provided with a guide slope (9).

6. The needle filter supporting and positioning frame according to claim 1, wherein the limiting slide block and the pressure plate are of a homogeneous and integral structure.