CN2092600U

CN2092600U - Thin-wall soil taking apparatus with fixed pistons of bottom water drindging and water-pressured type

Info

Publication number: CN2092600U
Application number: CN 91209456
Authority: CN
Inventors: 刘海刚
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-06-06
Filing date: 1991-06-06
Publication date: 1992-01-08

Abstract

The utility model relates to a bottom water discharging water pressure type thin-wall soil sampling apparatus with a fixed piston, particularly a sampling (soil) tool which is drilled in a soft soil layer to sample for ground engineering exploration. The utility model mainly solves the problems of the existing water pressure piston type soil sampling apparatus, such as complex structure, fussy operation, etc. The utility model is characterized in that a piston rod (5) which is connected with a sampling head (1) and a lower piston (6) is a solid piston rod, an upper piston (3) is provided with a water discharging hole (9) and a pressure relieving hole (10), and a slot hole gap air discharging device (6') is arranged in the connected position of the solid piston rod (5) and a lower piston (6). Compared with the foreign water pressure piston type soil sampling apparatus, the water discharging way is changed, the water discharging and passing cross section is increased, a thin-wall pipe (4) which is used for sampling in a rotary way can relieve the vacuum at the top of a soil sample (17), the structure is simple, and the operation is convenient.

Description

Thin-wall soil taking apparatus with fixed pistons of bottom water drindging and water-pressured type

The utility model (hereinafter to be referred as soil sampler) relates to a kind of sampling (soil) instrument of drive sampling in the geotechnical investigation weak soil layer.

At present, hydraulic piston soil sampler (Japanese Utility Model communique (Y2), the clear 59-25989 of the patent No.) complex structure, use complex operation, dismounting inconvenience needs earlier hydraulic pressure outer tube (2) to be shed after each sampling, and then lay down screw (3 '), on move upper piston (3), remove vacuum between lower piston (6) and soil sample (17) with special spanner after, just can unload the light-wall pipe of sampling.And hollow piston rod (5) is a force rod, and difficulty is made in selection, in case stop up cleaned and changed inconvenience.

The utility model is achieved in that between sampling head and lower piston and is connected and fixed with real core piston rod, changed drainage pattern in the past thus, press water enters the soil sampler pressurizing chamber by drilling rod, upper piston moves down under effect of water pressure; light-wall pipe is pressed in the soil; the empty G﹠W of drain chamber is discharged at the bottom of the hole by light-wall pipe and outer tube annular gap by drain hole; the draining cross-section of river of soil sampler is greater than existing hydraulic piston soil sampler hollow piston rod section; resistance of water drainage reduces; can reach the requirement that the sampling standard is pressed into light-wall pipe fast, reduce the soil sample disturbance.

Pressure meter by face of land water pump is observed, when pressure descends or the aperture emits water to change promptly to accuse sampling and finishes, soil sampler is carried to the face of land, unload screw, the rotation probe tube, make piston-rod lower end and lower piston produce the gap, air along the gap and groove enter the soil sample top, can easily unload the sampling light-wall pipe after removing vacuum.Whole process is compared with used hydraulic type soil sampler, and sampling efficiency can improve 100%, has reached simple in structure, and is easy to operate, the purpose of being convenient to promote the use of.

Below in conjunction with accompanying drawing in detail structure of the present utility model and correct using method are described in detail:

Fig. 1, structural representation of the present utility model.

Fig. 2, the utility model sampling method of press-fitting schematic diagram.

Fig. 3, the utility model sampling is pressed into the end schematic diagram.

The outer tube (2) that this soil sampler structure mainly is connected with it by sampling head (1), upper piston (3) be the light-wall pipe (4) of screw (3 ') connection with it, real core piston rod (5), lower piston (6), means of deflation compositions such as (6 ').Before the sampling, soil sampler is assembled in order, limit jointed rod (13) limit is lowered to soil sampler, and soil sampler couples together drilling rod (13) and water pump (14) after arriving boring (7) bottom with sebific duct (15), uses fixedly drilling rod of rig (16) vertical shaft.Open pumps water, press water enters soil sampler pressurizing chamber (11) through drilling rod by hole (12), under effect of water pressure, upper piston (3) moves down, drive light-wall pipe (4) and be pressed in the soil, the empty G﹠W of drain chamber (8) is discharged at the bottom of the hole by the annular gap of light-wall pipe (4), outer tube (2) by drain hole (9), after upper piston (3) is displaced downwardly to lower piston (6), relief hole (10) exposes outer tube, and press water releases.Can judge that by the decline of face of land water pump (14) pressure meter pressure sampling puts in place, soil sampler is carried to the face of land, lay down screw (3 '), rotation sampling light-wall pipe (4), make piston rod (5) lower end and lower piston produce the gap, air along the gap and groove enter soil sample (17) top, can easily unload the sampling light-wall pipe after removing vacuum, change behind the sampling light-wall pipe from new use.

Claims

1, a kind of end draining hydraulic type fixed piston thin-wall sampler that is used for the drive sampling of geotechnical investigation weak soil layer, it comprises sampling head (1) and outer tube (2), light-wall pipe (4) is fixed on screw (3 ') on the upper piston (3), fixedly upper piston (3) and the piston rod that is connected lower piston (6) (5), it is characterized in that piston rod (5) is real core piston rod, upper piston (3) has the Overflow drainage hole (9) of drain chamber and the press water relief hole (10) of pressurizing chamber (11), real core piston rod (5) and lower piston (6) junction grooved hole gap means of deflation (6 ').

2, soil sampler according to claim 1 is characterized in that there is relief hole (10) upper end of upper piston (3), and bottom (bottom) has drain hole (9).

3, soil sampler according to claim 1, the slotted eye gap that it is characterized in that means of deflation (6 ') are that the thread spindle that is connected with lower piston of piston rod (5) bottom is to 1 to 2 strip air drain of processing.