JPS5828541B2 - Soft soil sampling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for collecting samples of soft soil such as sludge deposited on the bottom of water.

To know the composition or layered state of soft soil such as sludge,
Traditionally, samples were collected by inserting a sampling pipe into the soil, but when the sampling pipe is inserted into the soil, the soil at the sample collection point is compacted into a cylindrical shape and sheared, which disturbs the soil.
The disadvantage is that it is not possible to obtain natural samples.

Therefore, an object of the present invention is to provide an apparatus that can collect natural S samples without disturbing the soil at the collection point.

Embodiments of the present invention will be described below based on the accompanying drawings.

The device of this invention constructs a pipe-shaped collection cylinder by sliding two complementary halves 1 and 1', which are obtained by vertically dividing one pipe into two, relative to each other in the length direction. It is something.

A disk 2 is integrally provided at the upper end of one of the complementary half bodies 1, an operating shaft 3 is coupled to the center of the upper surface of the disk 2, and guide shafts are attached to both sides of the operating shaft 3. 4 are combined.

Further, a valve plate 5 is provided on the inner surface of the lower end of this complementary half body 1.

This valve plate 5 is mounted so that it can freely rotate between a closed state shown in solid lines in FIGS. 2 and 3 and an open state shown in chain lines in FIG.

The valve plate 5 has a shape in which both sides of a disc are partially cut out, as shown in FIG.
It can be rotated as described above inside the pipe-shaped collection tube formed by '.

A disc 2' is also provided at the upper end of the other complementary half 1', and the disc 2' has holes 3', 4' through which the aforementioned operating shaft 3 and guide shaft 4 are freely inserted. is provided.

By inserting the operating shaft 3 and the guide shaft 4 into these holes 3/ and 4/ from below and sliding each of the complementary halves 1 and 1' relative to each other, a collecting cylinder combined into a pipe shape is formed. be done.

A ring 6 is detachably attached to the outer periphery of the lower end of the complementary half 1' with screws 7.

Since the half periphery of this ring 6 fits into the outer periphery of the complementary half 1, the other complementary half 1' slides with respect to one complementary half 1 without separating.

Further, a suitable locking mechanism 12 is provided between the ring 6 and the complementary half 1, which engages with a relatively small force.

A coupling device 8 is fitted onto the operating shaft 3 and the guide shaft 4 above the disc 2' of the complementary half 1'.

The coupling device 8 has a flange 9, and the guide shaft 4 is fitted into a notch 10 provided on the periphery of the flange 9 (fourth
(see figure).

Further, the coupling device 8 is provided with a tapered hole 11 having a small diameter at the lower end, and an inverted truncated cone-shaped coupling member 13 is fitted inside the tapered hole 11.
It passes through freely.

Balls 14 are fitted into this coupling member 13, and each ball 14 comes into contact with the operating shaft 3 and the tapered hole 11.

A connecting screw member 15 is screwed into the upper part of the tapered hole 11, and a spring 16 is interposed between the screw member 15 and the connecting member 13.
3, a downward pressing force is constantly applied.

The aforementioned operating shaft 3 also passes through this screw member 15.

A threaded portion 17 for connection is provided at the upper end of the operating shaft 3.

In addition, 20 in the figure is a protrusion provided on the horizontal half body 1, and supports the valve plate 5.

The device of this invention consists of the above-mentioned interception,
Next, its effect will be explained.

First, the horizontal halves 1 and 1' are assembled as shown in FIGS. 1 and 2.

In this case, the horizontal half 1' has a locking mechanism 1 of its ring 6.
2, it is engaged with the other horizontal half body 1, so it will not slip off.

A casing may or may not be inserted in advance at the sample collection point, but a similar operating shaft 18 is connected to the threaded portion 17 of the operating shaft 3 of the above device, and an operating pipe is connected to the threaded member 15. 19 and insert it into the soil.

By inserting it into the soil, the valve plate 5 is lifted by the low stake as shown by the chain line in FIG.

When a predetermined depth is reached, insertion of the device is stopped and the operating shaft 3 is pulled up slightly, causing the valve plate 5 to return to its original state due to its vibration.

Next, when the coupling device 8 is pushed down by means of the operating pipe 19, the ring 6 of the horizontal half 1' is moved into the other horizontal half 1.
Since the horizontal half body 1' is only lightly engaged with the guide shaft 4, it is disengaged by the pressing force of the pipe 19, and the horizontal half body 1' descends along the guide shaft 4.

In this case, since the coupling member 13 receives an upward force from the tapered hole 11, the ball 14 does not cause any biting action.

In this way, the gutter-shaped halves 1, 1' take the form of a sample collection tube as shown in FIG. 3, and the sample is trapped inside it.

Next, when the operation pipe 19 is pulled upward, the ball 14 of the coupling member 13 is caught between the tapered hole 11 and the operation shaft 3, so that the coupling device 8, the operation shaft 3, and the horizontal The other horizontal half 1' engaged with radius 1 will also be pulled up together.

Although there is a slight gap between the valve plate 5 and each horizontal half body 1, 1', as shown in FIG. 7, the viscosity of the sample itself prevents it from being pulled out.

After being pulled up to a predetermined position on the ground in this manner, the horizontal half 1' is slid relative to the other horizontal half 1 and opened, and the sample is taken out.

At this time, the ring 6 may be removed.

Since the apparatus of the present invention is as described above, it has the following effects.

That is, it is made up of a combination of two horizontal halves,
Since they are inserted at different times and a valve body is provided at the lower end of the horizontal half that is inserted first, the soil is less disturbed than in the conventional case where the soil is sheared into a cylindrical shape at once. Less is.

Therefore, there is an effect that natural soil can be collected as a sample.

[Brief explanation of the drawing]

Fig. 1 is a perspective view, Fig. 2 is a sectional view, Fig. 3 is a sectional view of the sample captured state, Fig. 4 is a sectional view taken along the line IV-IV in Fig. 3, and Fig. 5 is the same <V-V. A cross-sectional view of the line, Figure 6 is VI
7 is a cross-sectional view taken along line -VI, and FIG. 7 is a cross-sectional view taken along line ■-■. 1.1'...Horizontal half, 2,2'...
Disc, 3... Operating shaft, 4... Guide shaft, 5... Valve plate, 6... Ring, 8...
...Coupling device, 12...Lock mechanism.

Claims (1)

[Claims] 12 complementary halves are made with their curved surfaces facing each other,
The prosthetic halves are combined so that they can be slid relative to each other in the length direction, and a locking mechanism is provided so that both prosthetic halves engage with each other when they are shifted to the greatest extent, and the prosthetic halves are positioned below in the above-mentioned locked state. A disk is provided at the upper end of the half, and an operating shaft is connected to the disk, and a valve plate that can be opened and closed is provided at the lower end of the complementary half, and the complementary half is also located above in the above-mentioned engagement state. A sample collection device for soft soil, characterized in that a disk is provided at the upper end of the half body, and the operating shaft is inserted through the disk.