CN204154594U

CN204154594U - A kind of automatic miniature lysimeter being adapted to sand loam soil

Info

Publication number: CN204154594U
Application number: CN201420541218.3U
Authority: CN
Inventors: 周玉红; 汪星; 汪有科; 王智; 何自立; 高志勇
Original assignee: Northwest A&F University
Current assignee: Northwest A&F University
Priority date: 2014-09-19
Filing date: 2014-09-19
Publication date: 2015-02-11
Anticipated expiration: 2024-09-19

Abstract

The utility model relates to a kind of automatic miniature lysimeter being adapted to sand loam soil, comprises soil sample collector and limnograph system.This soil sample collector by outer tube, inner sleeve, the formations such as wire mesh sandwich.Wherein outer tube inside has several gathering sills, is placed with steel wire tow line and guide ring in groove.Cutter ring is left in the bottom of outer tube, is beneficial to sampler and enters soil smoothly, and the upper edge of cutter ring flushes with the inwall of inner sleeve simultaneously, avoids inner sleeve to be subject to soil resistance effect.The limnograph system of this device is by precision balance, and support arm, inner support, wire sling, pulley system, the part such as suspension bracket forms.The utility model proposes and be suitable for sand loam soil, the soil basketing method of microvariations.Do not need soil sample to take out during measurement to weigh, can in-situ observation.Have employed the mode of automatic gauge on the whole, can Continuous Observation.Sampler skin have employed lattice structure, reduces the boundary effect of conventional small lysimeter.

Description

A kind of automatic miniature lysimeter being adapted to sand loam soil

Technical field

The utility model relates to a kind of automatic miniature lysimeter being adapted to sand loam soil.

Background technology

Lysimeter (being called for short Lysimeter) is in electronic technology, the research field such as soil physics and micro climate, conveniently effectively measure the evapotranspiring of plant, a kind of system developed for farmland hydrologic research, the automatic Observation instrument of advanced person be simple and easy to.This instrument be mainly used in testing Soil Water evaporation and Crop transpirstion the total Water that scatters and disappears and quantity of leakage water of soil, rainfall amount, icepro bear water and dust and sand weather dried wet deposition.At present, liquid buoyancy balance lysimeter, mechanical lever lysimeter, pressure transducer Weighing Lysimeter etc. are mainly contained for the development of lysimeter both at home and abroad.Its common feature be utilize sensor measure soil in soil container because evaporating, evapotranspiring, seepage, precipitation or irrigation and the soil moisture weight change that causes, timely grasp soil moisture arid measured value, irrigates for Agro-ecology and using water wisely provides scientific basis.Existing pressure transducer Weighing Lysimeter is by inner drum, exterior bowl, high precision spring, sensor, big basement, automatic water-replenishing device, adjustable support, leaky pipe and seepage are from note sensor composition, this inside and outside twin-tub pressure sensor Weighing Lysimeter, due to its twin-tub structural design reason, interior bucket diameter is 2 meters, be highly 2 meters, undisturbed soil is loaded in staving, equidistantly below staving be mutually 120 degree and three high-strength springs are installed support immediately below inner drum, and High-precision suspension sensor, utilize sensor that soil weight in staving is converted into electric signal, stored by data acquisition system (DAS) process again, and be converted into the evapotranspiration of water in soil, the difference of twice measured value in front and back is the evapotranspiration of water in the soil of period, the cost of pressure transducer Weighing Lysimeter is higher, need to build big basement for safeguarding and changing spring and pressure transducer, civil engineering costly.

The miniature evaporator of current existence, complex structure, expensive.

At present, Large-scale lysimeter precision is high, and boundary effect is little, can continuous coverage.But investment is large, is inconvenient to move, support equipment is complicated.In addition, small precast unit is laid easily, convenient mobile, can multimetering, and small investment is easy for installation, but its precision is low, is vulnerable to external environmental interference, and boundary effect is comparatively obvious, can not continuous coverage.The Method compare that fetches earth of existing miniature evaporator falls behind, larger to the disturbance of soil.Especially for the sand loam soil of Arid&semi-arid area, soil water content itself is lower, and the soil texture is loose, when comparatively dry, be sometimes difficult to sampling.Further, existing miniature evaporator is not suitable for original position Continuous Observation.

Utility model content

The utility model proposes a kind of sand loam soil that is suitable for, the soil basketing method of microvariations.Do not need soil sample to take out during measurement to weigh, can in-situ observation, this is necessary for sand loam soil.Have employed the mode of automatic gauge on the whole, can Continuous Observation.Sampler skin have employed lattice structure, the boundary effect of the small precast unit of reducing over.

The utility model relates to a kind of automatic miniature lysimeter being adapted to sand loam soil, comprises soil sample collector and limnograph system.This soil sample collector is by outer tube, and inner sleeve, wire mesh sandwich is formed.Wherein outer tube inside has several gathering sills, is placed with steel wire tow line and guide ring in groove.Cutter ring is left in the bottom of outer tube, is beneficial to sampler and enters soil smoothly, and the upper edge of cutter ring flushes with the inwall of inner sleeve simultaneously, avoids inner sleeve to be subject to soil resistance effect.

The limnograph system of this device is by precision balance, and support arm, inner support, wire sling, pulley system, the part such as suspension bracket forms.

Accompanying drawing explanation

Describe exemplary embodiment of the present utility model in more detail by referring to accompanying drawing, above and other aspect of the present utility model and advantage will become and more be readily clear of, in the accompanying drawings:

Fig. 1 is a kind of soil sample collector structural representation being adapted to the automatic miniature lysimeter of sand loam soil of the present utility model;

Fig. 2 is a kind of one-piece construction schematic diagram being adapted to the automatic miniature lysimeter of sand loam soil of the present utility model;

Fig. 3 is a kind of vertical view being adapted to the automatic miniature lysimeter of sand loam soil of the present utility model.

Embodiment

Hereinafter, more fully the utility model is described now with reference to accompanying drawing, various embodiment shown in the drawings.But the utility model can be implemented in many different forms, and should not be interpreted as being confined to embodiment set forth herein.On the contrary, provide these embodiments to make the disclosure will be thoroughly with completely, and scope of the present utility model is conveyed to those skilled in the art fully.

Hereinafter, with reference to the accompanying drawings exemplary embodiment of the present utility model is described in more detail.

With reference to accompanying drawing 1-3, whole device comprises soil sample collector and limnograph system.

As shown in Figure 1, be the soil sample collector of this device.This system is by outer tube, and inner sleeve, wire mesh sandwich is formed.Wherein outer tube inside has several gathering sills, is placed with steel wire tow line and guide ring in groove.Cutter ring is left in the bottom of outer tube, is beneficial to sampler and enters soil smoothly, and the upper edge of cutter ring flushes with the inwall of inner sleeve simultaneously, avoids inner sleeve to be subject to soil resistance effect.

Operating process is as follows:

1. take out outer tube, in gathering sill, arrange steel wire tow line, and through guide ring, one end of steel wire ring is fixed on guide ring, the other end, through guide ring, extends to earth's surface along gathering sill.Steel wire tow line forms the annular can strained a kind of one end under the effect of guide ring.This ring-shaped inner part is enclosed in the outside of flexible steel silk screen.According to needed the design along sleeve pipe radial arrangement three place's guide rings and the supporting steel wire tow line of general soil moisture research.

2. three place's steel wire rings are passed, from top to bottom successively until combine closely along cutter ring edge to it under bottom and outer tube in outside flexible steel silk screen being wrapped in inner sleeve.Because outer sleeve inner wall has gathering sill, wire rope and guide ring are all in groove, can not affect putting into of inner sleeve and woven wire, can combine closely, and bottom reserves the unnecessary flexible steel silk screen of a part simultaneously, are beneficial to locking bottom soil sample opening.

3. after installing, sampler is imported in sand loam soil gradually perpendicular to soil, until arrive bottom.When behind arrival precalculated position, by inner sleeve pull-up gradually, when arrive bottom guide ring position time stop, then corresponding steel wire draw ring is pulled, because the supporting function of inner sleeve disappears, the action flexible woven wire being subject to wire rope tangential movement shrinks gradually, is cut off by sand loam soil earth pillar and wraps up closely.Continue mobile inner sleeve until second guide ring position stops, repeating above process.

4. finally the soil sample obtained and steel wire tow line are taken out, obtain wrapping up three part soil samples closely, adopt nylon cable tie by bottom soil sample again colligation fix.Final cutting woven wire, release, wire stay cord, obtains soil sample.Sampler outer tube is still placed in soil.

As shown in Figure 2, the limnograph system for this device: this system is by precision balance, and support arm, inner support, wire sling, pulley system, the part such as suspension bracket forms.

Operating process is as follows:

First be separately fixed on suspension bracket by wrap three soil samples, suspension bracket two ends can be embedded in gathering sill, prevent soil sample from rotating.Put into wire sling along six (three to) gathering sills successively and soil sample is suspended in the sampling hole that sampler outer tube forms, wire rope is connected to the two ends of suspension bracket, wherein one end of wire rope is fixed on the crossbeam of inner support, one end can move freely in addition, free end is hung weight to balance soil sample Action of Gravity Field, to meeting the measuring amount range request (gravitational difference of weight and soil sample is added on precision balance) of precision balance, and by pulley combination, gravity is transformed to pulling force, be delivered on precision balance.Precision balance can arrange sampling interval and automatic recording function, and can be connected with computing machine and measure in real time.

The foregoing is only embodiment of the present utility model, be not limited to the utility model.The utility model can have various suitable change and change.All do within spirit of the present utility model and principle any amendment, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims

1. be adapted to an automatic miniature lysimeter for sand soil, it is characterized in that:

Described lysimeter comprises soil sample collector and limnograph system;

Described soil sample collector by outer tube, inner sleeve, wire mesh sandwich form; Wherein outer tube inside has several gathering sills, is placed with steel wire tow line and guide ring in groove; Cutter ring is left in the bottom of outer tube, is beneficial to sampler and enters soil smoothly, and the upper edge of cutter ring flushes with the inwall of inner sleeve simultaneously, avoids inner sleeve to be subject to soil resistance effect;

Described limnograph system comprises precision balance, support arm, inner support, wire sling, pulley system, suspension bracket.