JP3186117U - Boring hole water collection device - Google Patents

Abstract

An object of the present invention is to provide a boring hole water collecting device capable of reliably collecting groundwater from a target section.
A long hollow cylinder made of a transparent synthetic resin, an upper lid provided at an upper end opening of the long hollow cylinder, a lower lid provided at a lower end opening, and a long fixed to an outer surface of the upper lid It comprises an inflow prevention valve 4 for preventing backflow into the hollow cylinder and an outflow prevention valve 5 for preventing backflow from the long hollow cylinder fixed to the inner surface of the lower lid. Data that is useful for elucidating the mechanism of landslide generation by reliably collecting groundwater from the targeted section because groundwater at a predetermined depth can be collected without escaping by simply moving down, stopping and pulling up into the synthetic resin pipe 10 in the borehole. Can be provided.
[Selection] Figure 3

Description

  The present invention relates to a borehole water sampling device for investigating the quality of groundwater.

Conventionally, knowing the quality of groundwater is important for elucidating the mechanism of landslide occurrence and planning countermeasures. In the landslide area, the moving mass is disturbed, and there are multiple aquifers and the flow of groundwater is complicated.
There are various devices for collecting groundwater, and an example of a device for collecting water at a predetermined position in water is a fixed-position water collection device in a borehole using a water collection pipe (see Patent Document 1).
In this known technique, a water intake hole is provided in the upper part of a water tank which is a water sampling pipe, and an open / close valve is provided in the water intake hole, and this open / close valve is operated by an electromagnetic coil. In order to collect water at a predetermined water level, the water tank is lowered to a predetermined position in the boring hole, and the electromagnetic coil is energized at the lowered position to open the on-off valve, and the water intake hole is opened to open the water in the boring hole. This is a fixed-position water sampling device in a boring hole in which water is taken into the water tank from the water hole, the water is cut off, the solenoid coil is de-energized, the open / close valve is closed and the water intake hole is closed. .

In addition, it is possible to collect groundwater at any position easily with a simple structure without using electric means, and to collect water continuously without mixing water at different positions without the need for large-scale equipment. There is known a groundwater sampling device and a sampling method that can perform the above (see Patent Document 2).
This known technique has a bottom lid attached to a wire such as a wire, a water sampling pipe fitted with the bottom lid and having an inner diameter equal to the outer diameter of the bottom lid, and a guide hole for the rope, It consists of a combination of an upper lid attached to the upper opening of the water sampling pipe, and the separated bottom lid, the water sampling pipe and the upper lid are submerged in the groundwater layer in advance from the bottom lid, and sequentially combined at predetermined positions in the water. A ground water sampling apparatus and a water sampling method for enclosing water at a predetermined position in a water sampling pipe.

In these known techniques, the former opens and closes the water intake hole by electrical means, so there is a risk that water will not be collected if an electrical failure occurs, and the latter includes a bottom cover, a water sampling tube, and a top cover in a separated state. Are sequentially combined at predetermined positions in the water, so that there is a possibility that the combination cannot be performed completely.
The present invention eliminates them, and is a water sampling device for borehole water that can reliably collect groundwater from a target section.

Japanese Patent Publication No.55-4914 Japanese Patent Laid-Open No. 11-229748

  It is an object of the present invention to provide a boring hole water collection device that can reliably collect groundwater from a target section.

Boring hole water collection device of the present invention is a long hollow cylinder made of transparent synthetic resin, an upper lid provided at the upper end opening of the long hollow cylinder and a lower lid provided at the lower end opening, An inflow prevention valve for preventing backflow into the long hollow cylinder fixed to the outer surface of the upper lid, and an outflow for preventing backflow from the long hollow cylinder fixed to the inner surface of the lower lid It consists of a prevention valve.
The inflow prevention valve is made of a disc-like rubber that closes an opening formed on the outer surface of the upper lid, and prevents the inflow of groundwater into the long hollow cylinder when it is pulled up.
The outflow prevention valve is made of a disc-like rubber that closes an opening formed in the inner surface of the lower lid body, and prevents the outflow of groundwater from the long hollow cylinder when it is pulled up.

  Boring hole water collection device of the present invention is a long hollow cylinder made of transparent synthetic resin, an upper lid provided at the upper end opening of the long hollow cylinder and a lower lid provided at the lower end opening, An inflow prevention valve for preventing backflow into the long hollow cylinder fixed to the outer surface of the upper lid, and an outflow for preventing backflow from the long hollow cylinder fixed to the inner surface of the lower lid Since it consists of a prevention valve, it becomes possible to collect groundwater reliably from the target section.

It is sectional drawing of the sampling device of the boring hole water of this invention. It is explanatory drawing which shows installation of the sampling device of the water in a boring hole of this invention. It is explanatory drawing which shows the use condition of the sampling device of the borehole water of this invention.

An embodiment of a water collecting device for boring hole water according to the present invention will be described below with reference to the accompanying drawings.
As shown in the cross-sectional view of FIG. 1, a sampling device for boring hole water according to the present invention includes a long hollow cylinder 1 made of a transparent synthetic resin, and an upper lid provided at an upper end opening of the long hollow cylinder 1. 2 and the lower lid 3 provided at the lower end opening, the inflow prevention valve 4 for preventing the backflow into the long hollow cylinder 1 fixed to the outer surface of the upper lid 2, and the lower lid 3 It comprises an outflow prevention valve 5 for preventing a back flow from the inside of the long hollow cylinder 1 fixed to the inner surface.
The long hollow cylinder 1 is made of a transparent synthetic resin such as polyethylene, polyvinyl chloride, acrylic, or fluororesin, and has a length of 100 cm and an inner diameter of 2 cm.
The upper lid 2 has a cap shape that closes the upper opening of the long hollow cylinder, and is fixed liquid-tightly with an adhesive or the like.
The lower lid 3 has a cap shape that closes the lower opening of the long hollow cylinder, and is fixed liquid-tightly with an adhesive or the like.
The inflow prevention valve 4 is made of a disc-like rubber fixed to the outer surface of the upper lid 2 with screws 7 in order to close the opening 6 formed in the upper lid 2, and the boring hole water collecting device according to the present invention When the water is pulled up, the inflow of groundwater into the long hollow cylinder 1 is prevented.
The outflow prevention valve 5 is made of a disc-like rubber fixed to the inner surface of the lower lid body 3 with screws 9 in order to close the opening 8 formed in the lower lid body 3. When the collection tool is pulled up, the outflow of groundwater from the inside of the long hollow cylinder 1 is prevented.

Next, the operation of the boring hole water collecting device according to the present invention will be described with reference to the accompanying drawings.
As shown in the explanatory diagram of FIG. 2, a synthetic resin pipe 10, for example, VP 40, strained in the bore hole is loaded, and the boring hole water collection device of the present invention is suspended from the ground with a wire 11 to determine the inside of the VP 40. Lower at speed.
Stop at the target depth of the groundwater level and collect groundwater at the target depth.
The collection of groundwater is performed as shown in the explanatory diagrams of FIGS.
At the time of lowering in FIG. 3 (a), when the water collecting device in the borehole of the present invention is lowered by its own weight, the inflow prevention valve 4 and the outflow prevention valve 5 at the upper and lower ends of the long hollow cylinder 1 are opened by the water flow. Therefore, groundwater passes through the long hollow cylinder 1.
At the time of stopping in FIG. 3 (b), when the water collecting device in the borehole of the present invention stops at the target depth, the inflow prevention valves 4 and outflow prevention valves 5 at the upper and lower ends of the long hollow cylinder 1 are caused by water pressure. In order to close, groundwater is confined in the long hollow cylinder 1.
At the time of pulling up in FIG. 3 (c), when the sampling device for boring hole water of the present invention is pulled up, the inflow prevention valve 4 and the outflow prevention valve 5 at the upper and lower ends of the long hollow cylinder 1 are closed by water pressure. Since it is pulled up to the ground as it is, it is possible to collect groundwater at a predetermined depth without escaping.

  As described above, the water collecting device for the borehole water of the present invention can collect the groundwater at a predetermined depth without escaping in the synthetic resin pipe 10 of the borehole through a simple operation of descent → stop → pull up. It is possible to collect groundwater and provide useful data for elucidating the mechanism of landslide generation.

DESCRIPTION OF SYMBOLS 1 Long hollow cylinder 2 Upper cover body 3 Lower cover body 4 Inflow prevention valve 5 Outflow prevention valve 6 Opening 7 Screw 8 Opening 9 Screw 10 Synthetic resin pipe 11 Wire

Claims (3)

  A long hollow cylinder made of transparent synthetic resin, an upper lid provided at the upper end opening of the long hollow cylinder, a lower lid provided at the lower end opening, and a long hollow cylinder fixed to the outer surface of the upper lid A boring hole comprising: an inflow prevention valve for preventing backflow into the body; and an outflow prevention valve for preventing backflow from the long hollow cylinder fixed to the inner surface of the lower lid body Internal water sampling equipment.   The inflow prevention valve is made of a disc-like rubber that closes an opening formed on the outer surface of the upper lid body, and prevents the inflow of groundwater into the long hollow cylinder when it is pulled up. The boring hole water collecting device according to claim 1, wherein the boring hole water is collected.   The outflow prevention valve is made of a disc-like rubber that closes an opening formed in the inner surface of the lower lid body, and prevents the outflow of groundwater from the long hollow cylinder body when pulled up. The boring hole water collecting device according to claim 1.

Images