CN2076236U

CN2076236U - Sample-separated filter

Info

Publication number: CN2076236U
Application number: CN 90218151
Authority: CN
Inventors: 李德森
Original assignee: YUNNAN SEISMIC OFFICE
Current assignee: YUNNAN SEISMIC OFFICE
Priority date: 1990-08-14
Filing date: 1990-08-14
Publication date: 1991-05-01

Abstract

The utility model provides a sample-separated filter for particulate samples, comprising a funnel, a supporting sheet disk, a multi-hole plate, an upper cover, etc. Metal supporting sheets are arranged in a groove on the supporting sheet disk, when the filter is rocked and oscillated, the metal supporting sheets can not move outward, and the particulates samples can be uniformly distributed on each metal supporting sheet. Furthermore, the sample-separated filter has simple structure, convenient operation and low cost, being an indispensable tool for physical and chemical laboratories.

Description

Sample-separated filter

The utility model relates to a kind of laboratory sample and divides the spline filter device, belongs to laboratory paraphernalia.

When a certain material is carried out analytical test, at first get a part of this material as sample, and this sample is carried out the branch sample, thereby make the sample that can supply analytical test to use.The means that particulate samples is carried out the branch sample are that Buchner funnel divides sample in the prior art, but exist many shortcomings when adopting this funnel to carry out the branch sample, the first, the distribution of sample particulate in Buchner funnel is the normal distribution of bivector, and its probability density formula is:

σ is a variance in the formula, and μ is that (i.e. the mean value of this distribution) is longed in the unknown, and the figure of its distribution function is seen shown in Figure 1, and the distribution density of particulate that hence one can see that is index law by the centre to the edge and successively decreases; The second, therefore because of scisse is placed on above the smooth funnel microwell plate, when adding, sample fashionablely very easily washed away, and cause supporting spring to overlap each other, the sample distribution inequality; The 3rd, when most of sample flows on the funnel microwell plate, the taper position that tends to fall into funnel from micropore causes sample loss serious, and the sample on the scisse is few, and maldistribution, be difficult to obtain qualified samples, its qualification rate is less than 20%, for above-mentioned reasons, most laboratory does not all adopt this method to carry out the branch sample, and adopts acetone method, but this method is complicated operating process not only, the cost-effective rate is low, and the sample preparation cycle is long, and the acetone that uses in the sample making course also can bring harm to human body.

The purpose of the utility model is to overcome the deficiency of prior art existence, provide a kind of simple in structure, easy to operate, and sample distribution is even, and the particulate samples that is easy to promote the use of is divided the spline filter device.

The utility model is realized by following scheme: it comprise funnel (1), tray (2), porous plate (3) with and on have the filler cap (4) of blanking hole (8), wherein tray (2) is placed on the bottom of funnel (1), porous plate (3) is positioned at the top of tray (2), and link to each other with an end of central shaft (5), the other end of central shaft (5) links to each other with filler cap (4), at filler cap blanking hole (8) top plug stopple (7) is arranged.

Fig. 1 is the sample distribution functional arrangement of prior art;

Fig. 2 is the sample distribution functional arrangement of the utility model;

Fig. 3 is the structure collectivity figure of the utility model;

Fig. 4 is pore size distribution figure in orifice plate garden more than the utility model;

Below in conjunction with accompanying drawing the utility model is further described, is not limited only to this but hold within the utility model.

In funnel (1), be provided with tray (2) and porous plate (3), funnel (1) is provided with loam cake (4), and be connected as a single entity by central shaft (5) and porous plate (3), central shaft (5) is a tubular shaft, distance between loam cake (4) and the porous plate (3) can be regulated by placing the nut (6) on the axle head, and blanking hole (8) and stopple (7) that loam cake (4) is provided with are used for the particulate samples mixed liquor is sent into funnel; Porous plate (3) is provided with the circular hole (13) of a plurality of diameters less than scisse (11), and the arrangement mode of its circular hole is undertaken by close-packed hexagonal; Tray (2) is provided with a plurality of bottoms and has one or more apertures (10), also can place the groove (9) of scisse (11), and be provided with the cylindrical handle (12) of an external diameter in the centre of tray less than the internal diameter of central shaft (5), when cover lid (4), this handle penetrates in the central shaft (5), when compressing loam cake, porous plate 3 closely links to each other with tray 2.

Embodiment: earlier tray (2) is inserted in the funnel (1), with tweezers scisse is put into groove (9) respectively, the loam cake (4) of porous plate (3) of will ining succession again is placed on funnel (1) and goes up and compress, porous plate this moment (3) is tightly pushed down tray (2), when the vibration funnel, scisse is all the time among groove, take off stopple (7), and with particulate samples mixed liquor stopple beyond the Great Wall after blanking hole (8) injects, vibrate repeatedly this device tens of time after, place this on support and remove loam cake, precipitate after 20-25 minute, speed with 1 of per second is emitted the water that filters out, and can make the sample of using for analytical test.

Its equally distributed probability density formula of sample that makes with the utility model is:

The distribution function figure as shown in Figure 2, hence one can see that, the distribution probability of particulate any point in the zone is equal.

Following table has provided the experimental result ^2﹠10 that sample is carried out the branch spline filter with the utility model

Average quality X=1.5(* 10 ^-3G)

By a bit, adopt the utility model to carry out sample when dividing spline filter, not only simple in structure, easy to operate, time saving and energy saving, and the distribution of particulate samples on each sheet scisse is quite even, both having improved work renders a service, having increased branch sample degree of accuracy again, thereby improved the analytical test accuracy, is the articles for use of current physics and chemistry testing laboratory indispensability.

Claims

1, the particulate samples of a kind of band funnel (1) is divided the spline filter device, it is characterized in that it also comprises the filler cap (4) that has blanking hole (8) on it and is placed on the tray (2) of funnel (1) bottom and the porous plate (3) that is positioned at this tray (2) top.

2, filtrator according to claim 1 is characterized in that the circle centre position of porous plate (3) links to each other by the end of wringing fit with central shaft (5), and the other end of central shaft (5) links to each other with filler cap (4) with bolt and nut.

3, filtrator according to claim 1 and 2 is characterized in that central shaft (5) is a tubular shaft, and blanking hole (8) is plugged with stopple (7).

4, filtrator according to claim 1 is characterized in that tray (2) is provided with a plurality of grooves (9) of placing sample supporting spring (11), and has aperture (10) at bottom portion of groove.

5, according to claim 1 or 4 described filtrators, it is characterized in that being provided with one handle (12) at the circle centre position of tray (2), the aperture (10) in groove (9) bottom is 1-4.