CN2146710Y

CN2146710Y - Soil permeability testing device

Info

Publication number: CN2146710Y
Application number: CN 92245403
Authority: CN
Inventors: 雷廷武; 曾德超; 刘洪禄
Original assignee: BEIJING UNIV OF AGRICULTURAL ENGINEERING
Current assignee: BEIJING UNIV OF AGRICULTURAL ENGINEERING
Priority date: 1992-12-30
Filing date: 1992-12-30
Publication date: 1993-11-17
Anticipated expiration: 2002-12-30

Abstract

The utility model discloses a soil permeability testing device, which belongs to a soil testing apparatus. The utility model comprises a soil container (5); an inlet tube (3) and a drainage tube (7) are wound round the soil container (5); an inlet hole (4) and a drainage hole (6) are arranged on the wall of the soil container (5); the inlet hole (4) is communicated with the inlet tube (3); the drainage hole (6) is communicated with the drainage tube (7); the entrance of the inlet tube (3) is connected with a delivery container (1); the exit of the drainage tube (7) is connected with a water container (8). The infiltration rate of disturbed or undisturbed soil can be determined by utilizing the utility model. The utility model has the advantages of simple structure, exact measurement and convenience.

Description

Soil permeability testing device

The utility model relates to a kind of device that is used to measure soil infiltration rate, dependent territory earth testing tool class.

The infiltration rate curve is the important parameter that characterizes soil infiltration capability, for the research holard infiltrate mechanism, instruct the design of various irrigation systems or management all very important.But, the at present domestic device of measuring infiltration rate that still is not used in.

The purpose of this utility model is that a kind of device that can be used to measure the infiltration rate of disturbance or non-disturbed soil will be provided.

The purpose of this utility model is achieved in that and has adopted soil container and be looped around water inlet pipe and drainpipe on this soil container, inlet opening that communicates with water inlet pipe and the osculum that communicates with drainpipe are arranged on the wall of soil container, the inlet of water inlet pipe communicates with water supply container, and the outlet and the water container of drainpipe join.After soil container is packed disturbance or non-disturbed sample into, supply water to soil sample through water inlet pipe by water supply container, keep soil sample very thin surface water layer (nothing is pressed into and oozes) or given depth water layer (be pressed into and ooze), when surpassing the given degree of depth when supplying water, unnecessary water is discharged by the drainpipe on the soil container, enter water container, in given small time period △ t, the water yield that water supply part is supplied with is ω ₁, the water yield of discharge is ω ₀, then amount of infiltrating water is △ ω=ω ₁-ω ₀Thereby, the average infiltration rate i in the △ t _aFor

i _a＝ (△ω)/(A△t) ＝ (ω ₁-ω ₀)/(△t·A)

Wherein A is for infiltrating surface area, i.e. the soil sample area.

After recording the infiltration rate of different time, get final product infiltration rate i and time relation curve.

The utlity model has simple in structure, measure accurately, advantage easily.

Fig. 1 is the structural representation of the utility model soil infiltration rate determinator.

The utility model will be further described with reference to the accompanying drawings below.

Among Fig. 15 is the soil containers that are used for adorning disturbance to be determined or non-disturbed sample, inlet around thereon water inlet pipe 3 connects water supply container 1, several inlet openings that communicate with water inlet pipe 4 are arranged on the wall of soil container,, reduce the initial error that only supplies water and cause with single hole so that many mouthfuls are supplied water simultaneously.7 for being looped around the drainpipe on the soil container 5, and the osculum that communicates with drainpipe 7 is arranged on the wall of soil container 5, and the water delivering orifice of drainpipe 7 can be adjusted up and down, is as the criterion to reach required head.8 is water container.2 and 9 are piezometric tube, can carry out labor measurement like this.What be installed in water supply container 1 bottom is weighing device 12, what be installed in water container 8 bottoms is weighing device 10, so also can carry out labor measurement, if this two weighing device is inserted electronic operation through transducer wire to be handled and display part 11, then can directly demonstrate the infiltration rate data, also can be with the infiltration rate storage of different time, output infiltration rate data or image during end of test (EOT).

Claims

1, a kind of soil infiltration rate determinator, it is characterized in that, it comprises soil container (5), is looped around water inlet pipe (3) and drainpipe (7) on this soil container (5), inlet opening (4) that communicates with water inlet pipe (3) and the osculum (6) that communicates with drainpipe (7) are arranged on the wall of soil container (5), the inlet of water inlet pipe (3) connects water supply container (1), and the outlet of drainpipe (7) connects water container (8).

2, soil infiltration rate determinator according to claim 1 is characterized in that metering reading piezometric tube (2) is housed on the water supply container (1), and metering reading piezometric tube (9) is housed on the water container (8).

3, soil infiltration rate determinator according to claim 1 is characterized in that the bottom of water supply container (1) and water container (8) is respectively equipped with weighing device (12) and (10).