A ground drilling device for installing observation probes

Abstract

A ground punching device for mounting observation inserting tube comprises a ground drilling steel pipe; a base plate; two vertical support ear sheets which are parallelly installed above the base plate; a guide sleeve is rotatably supported between the two support ear sheets; the ground drilling steel pipe is installed inside the guide sleeve and is supported by the guide sleeve to be inserted into the ground along a set angle of the guide sleeve and bring soil out to form holes suitable for mounting observation inserting tubes. According to the ground punching device of the invention, soil is cut softly by means of down force; the device has simple structure and is easy to operate and will not bring disturbance on soil and plant roots; and the base plate and the guide sleeve which can stabilize the angle of punching are provided by the punching device of the invention so that direction deviation will not be generated during punching process; the punching angle can be conveniently set; the punched holes are straight and have smooth hole walls; the device brings little disturbance on soil and roots; the diameter of holes is uniform and the contact with the inserting tubes is moderate; the device is helpful in obtaining more accurate measurement results.

Description

technical field [0001] The invention relates to the technical field of ground installation of soil observation equipment, in particular to an installation device for experimental instruments, in particular to a ground drilling device for measuring soil moisture, root system density and other observation probes. Background technique [0002] Soil tensiometer, time-domain reflectometry (TDR), and root window technology are commonly used test devices and technologies for studying soil moisture and plant root ecology. The key to the installation of the instruments is the installation of the instrument probes that are in direct contact with the soil. The installation of the probe tube is currently mainly to use an earth drill to drill a hole whose depth and size match the length and diameter of the probe tube, and then insert the probe tube into the hole. This method mainly has several limitations and problems in actual operation: first, the soil drill mainly uses manpower to dri...

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Problems solved by technology

This method mainly has several limitations and problems in actual operation: first, the soil drill mainly uses manpower to drill holes, and it is difficult to use straight force during the drilling process, and the soil drill is easy to shake, which is easy to cause damage to the soil. The disturbance of soil and plant root system destroys the original structure of the soil and plant root system, resulting in measurement errors; second, the hole drilled by the soil drill, due to the rotation and lowering, swings larger, and the actual aperture is likely to be larger than the probe tube, causing the probe tube to be different from the probe tube. The soil cannot be in close contact, which will affect the measurement results; third, it is more convenient to drill holes for the installation of vertical probes, and it cannot be applied to the installation of probes with certain angle requirements

[0003] For example, Chinese patent document CN 105784777 A discloses a pre-drilling device that can be used in a profile soil moisture measurement system. The small hole where the probe is installed, if it is a large diameter observation probe, the small hole formed simply by squeezing the soil is easy to shrink in diameter, which will make it difficult to insert the observation probe or cause damage

In addition, this punching device is not suitable for drilling holes with a certain inclined angle.

[0004] In addition, the large-scale drilling equipment used in construction in the construction field has too much vibration and too much disturbance to the surrounding soil, so it is completely unsuitable for drilling and installation of soil observation probes, and its large and complex structure is not suitable for field research. use

Similarly, in the field of agricultural planting, there is also equipment that uses rotary drilling. The rotary drill bit will also cause disturbance to the soil and plant roots, and will also cause measurement errors.

However, small-scale agricultural plug-in drilling equipment lacks a stable and positioning structure, and it is easy to deviate from the direction when drilling, which will cause soil and root disturbance, and the inaccurate direction of manual force will cause the pore diameter to vary, which will lead to difficulty or damage to the probe tube insertion. The contact between the probe tube and the soil on the hole wall is not close, resulting in inaccurate measurement results

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