CN204807414U

CN204807414U - Soil grain size test device

Info

Publication number: CN204807414U
Application number: CN201520529608.3U
Authority: CN
Inventors: 明姣; 杜玉霞; 张泽; 赵淑萍
Original assignee: Cold and Arid Regions Environmental and Engineering Research Institute of CAS
Current assignee: Cold and Arid Regions Environmental and Engineering Research Institute of CAS
Priority date: 2015-07-21
Filing date: 2015-07-21
Publication date: 2015-11-25
Anticipated expiration: 2025-07-21

Abstract

The utility model relates to a soil grain size test device, its constitutional features comprise pipet stand, pipette, erlenmeyer flask, graduated flask, the accessories such as bottle, agitator that drain. Utilizing two, to turn on the water the water pressure of bottle poor, through controlling two glass pistons, according to stoke si dinglv, during the flat mouthful suction head 10 that utilizes pipette 7 stretches into the graduated flask suspension, draw the graduated flask in certain degree of depth locate and the soil suspension of concentration variation with time. Then control glass piston and two logical pistons pour into liquid the measuring cup into and wash the pipette. As required, inhale appearance, dry, weigh, calculate in the time of difference and the degree of depth, reach the grain grading of sample.

Description

A kind of particle-size analysis of soil samples test unit

Technical field

The utility model relates to a kind of particle-size analysis of soil samples test unit.

Background technology

Screen analysis test is important component part in soil test, and the particle composition of clear and definite soil and size-grade distribution have great importance for the engineering characteristic passing judgment on soil.The method that may be used for carrying out grain size analysis at present mainly contains: sieve formula, densimeter method, piette method and laser method.And for the soil that particle diameter is less than 0.075mm, then can only analyze with quiescent sedimentation law technology, it comprises densimeter method and piette method.When being less than the soil of 0.075mm with densitometer mensuration particle diameter, because this particle diameter soil settlement is fast, for the picnometer just putting into suspension, because the time is short, poor stability, the factor affecting reading is a lot, is therefore difficult to the numerical value accurately reading meniscus, is also just difficult to the number percent of accurately trying to achieve this particle diameter soil this soil shared.According to GB/T50123-1999 standard regulation process of the test be: after preparing soil supension, with stirrer along the suspension degree of depth upper and lower stirring 1min, take out stirrer, start stopwatch, the two-port valve of transfer pipet is placed in off-position, T-valve is placed in transfer pipet and inhale the position that communicates of ball, the time of repose needed for each particle diameter and the required suction sample degree of depth, transfer pipet is put into suspension by 10s in advance, immersion depth is 10cm, and draw suspension with suction ball, uptake is no less than 25ml.But, with in transfer pipet analytical test process, before sample interval several times extremely short, a sample is inhaled every tens seconds, and to seem very difficulty with the control that suction ball carries out inhaling sample speed and suction amount, it is extremely delayed to inhale the sample time before often causing several times, therefore makes to inhale the sample time and suction amount is difficult to control.Meanwhile, different testing standards, it is inhaled between sample and inhales the degree of depth difference of sample, therefore, does not have graduated transfer pipet can not meet the regulation of different experiments standard.

Summary of the invention

In view of above-mentioned, the purpose of this utility model aims to provide a kind of particle-size analysis of soil samples test unit

The purpose of this utility model is achieved in that

A kind of particle-size analysis of soil samples test unit, comprise pipet stand, conical flask, 1# Double Tops are real, 2# Double Tops are real, 1# glass piston, 2# glass piston, transfer pipet, scale mark, graduated cylinder, flat mouth suction nozzle, 1# aspirator bottle, 2# aspirator bottle, experiment table and two logical pistons, the 1# Double Tops that pipet stand is equipped with are real and 2# Double Tops are real fixes conical flask and transfer pipet respectively, conical flask bottom and transfer pipet upper end are equipped with 1# glass piston and 2# glass piston respectively, the flat mouth suction nozzle of transfer pipet lower end stretches in graduated cylinder, porose on flat mouth suction nozzle wall, transfer pipet there is the scale mark of different depth, the conduit of the 1# glass piston of conical flask bottom and transfer pipet middle and upper part lead to piston with left side two and are connected, two logical piston are connected with 2# aspirator bottle on experiment table by conduit, 2# aspirator bottle lower end is connected with 1# aspirator bottle (11) by conduit.

The beneficial effect of advantage of the present utility model and generation is:

1, utilizing and produce certain pressure differential between a two-way piston and two differing heights aspirator bottles and the suction that produces, by controlling one of them glass piston, can realize inhaling sample process.Need according to test the scale mark customizing needs on transfer pipet simultaneously, to locate it at subsurface different depth, facilitate the requirement of different tests demand and different tests standard.The utility model adopts differing heights aspirator bottle instead of and connects suction ball, saves energy and resources, easily can realize imbibition and the tapping function of transfer pipet.

2, the graduated flat mouth suction nozzle of processing belt, porose on wall, enables suction nozzle be accurately positioned in liquid level certain position once, realizes the sample solution accurately washing certain level liquid level during imbibition.

3, this instrument can be used for laboratory and carries out particle-size analysis of soil samples, and structure is simple, and cheap, operate easy, accuracy rate is higher.

Accompanying drawing explanation

Fig. 1 is the utility model schematic diagram.

Be 4# glass piston or 6# glass piston schematic diagram in Fig. 1 in Fig. 2, wherein: a figure left side is that glass piston opens schematic diagram, the figure right side is that glass piston closes schematic diagram.

Fig. 3 is two logical piston schematic diagram in Fig. 1, wherein: a figure left side is that two logical piston bottom rights open schematic diagram, is that two logical pistons close schematic diagram in figure, and the figure right side upper rightly under two logical pistons opens schematic diagram.

Fig. 4 is flat mouth suction nozzle schematic diagram in Fig. 1.

Wherein: 1-pipet stand; 2-conical flask; 3-1# Double Tops are real; 4-1# glass piston; 5-2# Double Tops are real; 6-2# glass piston; 7-transfer pipet; 8-scale mark; 9-graduated cylinder; The flat mouth suction nozzle of 10-; 11-1# aspirator bottle; 12-experiment table; 13-2# aspirator bottle; 14-two leads to piston; 15-hole.

Embodiment

Below in conjunction with accompanying drawing, the technical solution of the utility model is further described again:

According to standard prescriptive procedure, prepare soil suspension.With stirrer along the suspension degree of depth upper and lower stirring 1min in graduated cylinder 9, take out stirrer, start stopwatch, according to the time of repose needed for each particle diameter, transfer pipet 7 is stretched into a certain position of suspension (experimentally standard regulation is determined) by 30s in advance.

Operating process of the present utility model is see Fig. 1-4.Regulate Double Tops real 5 that transfer pipet 7 is moved up and down, the flat mouth suction nozzle 10 of transfer pipet 7 is stretched in graduated cylinder 9 suspension, owing to placing the position of the 2# aspirator bottle 13 on experiment table 12 higher than 1# aspirator bottle 11, make to produce certain pressure differential between the current direction aspirator bottle 11, two bottles of 2# aspirator bottle 13 li.Close 1# glass piston 4 and 2# glass piston 6, rotate two logical pistons 14, two logical piston 14 bottom rights are opened, draw the Soil Slurry 25ml of transfer pipet 7 high scale line depth in graduated cylinder 9 and concentration changes with time, quick rotation two leads to piston 14 makes it upper rightly open, suspension liquid level stabilizing is lived, regulate Double Tops real 5, make transfer pipet 7 increase and graduated cylinder 9, and rotate pipet stand 1 to different angles, under connect measuring cup, open 2# glass piston 6, rotate two logical pistons 14, make bottom right UNICOM on it, liquid is released.Open 1# glass piston 4, make the distilled water in conical flask 2 enter transfer pipet 7 and it is rinsed.In aspirator bottle 13 after water emptying, alternately change the position of 1# aspirator bottle 11 and 2# aspirator bottle 13,1# aspirator bottle 11 occupies high, 2# aspirator bottle 13 under, realize pressure differential, to carry out next round experiment.According to standard prescriptive procedure, by the suspension evaporate to dryness in measuring cup, dry at 105-110 DEG C of temperature, weigh, calculate, draw the grain composition of sample.

Claims

1. a particle-size analysis of soil samples test unit, comprises pipet stand (1), conical flask (2), 1# Double Tops real (3), 2# Double Tops real (5), 1# glass piston (4), 2# glass piston (6), transfer pipet (7), scale mark (8), graduated cylinder (9), flat mouth suction nozzle (10), 1# aspirator bottle (11), 2# aspirator bottle (13), experiment table (12) and two logical pistons (14), the 1# Double Tops that pipet stand (1) is equipped with real (3) and 2# Double Tops real (5) fix conical flask (2) and transfer pipet (7) respectively, conical flask (2) bottom and transfer pipet (7) upper end are equipped with 1# glass piston (4) and 2# glass piston (6) respectively, the flat mouth suction nozzle (10) of transfer pipet (7) lower end is stretched in graduated cylinder (9), on flat mouth suction nozzle wall porose (15), transfer pipet (7) there is the scale mark (8) of different depth, it is characterized in that the conduit of the 1# glass piston (4) of conical flask (2) bottom and transfer pipet (7) middle and upper part lead to piston (14) with left side two and be connected, two logical piston (14) lower ends are connected by the upper aspirator bottle (13) of conduit and experiment table (12), 2# aspirator bottle (13) lower end is connected with 1# aspirator bottle (11) by conduit.