JPH0540108Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field to which the invention belongs) The present invention relates to a device for detecting the position of the sand surface of a covered sand pile body within a casing during the construction of a covered sand pile.

(Issues of the invention and its features) In the construction management of ordinary sand piles, the position of the sand surface inside the casing is detected at any time using a sand level gauge, and the sand level gauge is generally equipped with a weight. The formula is used.

The object of the present invention is to provide a weight-type sand surface detection device for detecting the position of the sand surface of a covered sand pile body inside a casing when building a covered sand pile. The structural features are as described in the claims for utility model registration.

To create a covered sand pile, after forming a covered sand pile body (filled with sand inside the covering body) within a casing,
This method is carried out by discharging the covered sand pile into the ground from the lower end of the casing, but since it would be inconvenient if the sand surface detection wire was in the passing part of the covering when forming the covered sand pile, this method is not suitable for this invention. Due to its characteristic configuration, it is retracted to a position where it does not interfere with the passage of the covering.

(Specific explanation of the invention with drawings) Figure 1 is an explanatory diagram of one embodiment of the invention, in which covered sand piles are constructed using a cassette-type covering body as shown in Japanese Patent Application Laid-Open No. 137318/1983. It is now being done using

In other words, a cylindrical body 1 in which a covering for one pile (not shown) with a closed tip is inserted into the outside in a contracted state.
is removably attached to the outlet of the sand hopper 2, and the slide valve 3 is opened to send the sand from the sand hopper 2 through the cylinder 1 toward the tip of the covering body, and the contracted covering body is sequentially expanded and coated. The sand pile body is inserted into the casing 4 while forming the sand pile body, and a covered sand pile body of a predetermined length is formed inside the casing 4.

Reference numeral 5 denotes a pressure air chamber interposed between the cassette-type covering body attachment part 6 and the casing 4, and when the covered sand pile body formed in the casing 4 as described above is discharged from the lower end of the casing 4, this chamber is used. Pressure chamber 5
Pressurized air is supplied inside from a pressurized air supply pipe (not shown) to assist in discharging the covered sand pile body.

At the outlet of the guide pipe 8 passing through the upper partition wall 7 of the pressure chamber 5, there is a slide valve 1 which is opened and closed by the operation of a cylinder 9.
0, a support member 11 is provided to protrude downward from the valve body, and a guide sheave 12 is attached to this support member 11.

A winding detection section 13 of a weight type sand level gauge is installed outside the pressure chamber 5, and the sand surface detection wire 15 unwound from the winding drum 14 is passed through the guide sheave 12 inside the pressure chamber 5. The direction can be changed from horizontal to downward, and a weight 16 is attached to the lower end.

The state shown in the figure shows the stage where the formation of the covered sand pile body inside the casing 4 has been completed, and the slide valve 10
is closed, and the guide sheave 12 is at the sand surface detection position.

Detection of the sand surface is the same as with normal sand piles,
The weight 16 is lowered to the position of the sand surface, and the amount of movement of the sand surface detection wire 15 at that time is detected by the detection section of the winding detection section 13.

After the discharge of the covered sand pile body inside the casing 4 is completed,
When forming the coated sand pile body in the casing 4 again, the weight 16 is pulled upward from the position shown in the figure, and the cylinder 9 is operated to close the slide valve 1.
When the guide sheave 12 is opened, the guide sheave 12 moves to a lateral retracted position, and the sand surface detection wire 15 and the weight 16 also move to a lateral position where they do not interfere with the formation of the covered sand pile body.

FIG. 2 is an explanatory diagram of another embodiment of the present invention,
In this case, the covered sand pile body is formed by hanging the coated body whose upper end is attached to the outlet pipe 18 of the sand hopper 17 into the casing 19 and supplying sand into the inside thereof.

After forming a covered sand pile body of a predetermined length in the casing 19, the upper end of the casing 19 is closed with a lid 20 as shown in the figure, and in this case too, pressurized air is supplied to the casing 19 to help discharge the covered sand pile body. , in the case of the figure, there is an opening 2 that opens laterally at the upper end of the casing 19.
1, from which the pressure in the pressure chamber 22 through which the upper end of the casing 19 passes enters the casing 19.

A winding detection section 23 of a weight type sand level gauge is installed outside the pressure chamber 22, and a cylinder 24 is installed near the winding detection section 23.
The sand level detection wire 26 unwound from the winding drum 25 enters the casing 19 through the opening 21 and is turned from sideways to downward by a guide sheave 27 attached to the tip of the piston rod of the cylinder 24. A weight 28 is attached to its lower end.

The illustrated guide sheave 27 is in the sand surface detection position as in the case of FIG. When the next coated sand pile body is to be formed after discharging the coated sand pile body in 19, the weight 28 is raised to the position of the opening 21, and the piston rod of the cylinder 24 is retracted to close the guide sheave 27. All you have to do is move it to the evacuation position.

(Effects of the invention) Since the device of the present invention is as described above, it is possible to easily detect the sand surface of a covered sand pile using a weight-type sand level meter without any problems, and it is possible to detect the sand surface of a covered sand pile without any trouble. Construction management of pile construction can be performed reliably.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of one embodiment of the present invention, and FIG. 2 is a side sectional view of another embodiment. 9, 24... Cylinder, 12, 27... Guide sheave, 13, 23... Winding detection section, 14, 25
... Winding drum, 15, 26 ... Sand surface detection wire, 16, 28 ... Weight.

Claims (1)

[Scope of utility model registration request] A winding detecting section of a weight type sand level meter is installed on the outside of the upper part of the covered sand pile making device, and a cylinder is installed near it to detect the sand surface unrolled from the winding drum of the winding detecting section. A guide sheave is provided for changing the direction of the wire from sideways to downwards on the outside of the upper part of the coated sand pile making device, so that the guide sheave is moved from the sand surface detection position to the retraction position to the side by the operation of the cylinder. A covered sand pile sand surface detection device characterized by: