JP2595066Y2 - Dam grout circuit in dam grout injection method - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dam grout circuit comprising a mixer, a pump, a valve box, a borehole valve and a piping line connecting these components in a dam grout injection method.

[0002]

2. Description of the Related Art Conventionally, a dam grout circuit in a gum grout injection method is shown in FIG. In the figure, 21 is a mixer, 22 is a grout pump, 23
Is a valp box, 24 is a drilling hole valve, 25 is a return line, and the grout material kneaded by the mixer 21 is supplied into the drilling via the valve box 23 by the grout pump 22. At this time, a return valve is provided in the valve box 23 so as to have a preset injection flow rate and injection pressure.
When the value of the injection pressure is exceeded, the return valve opens, and the grout material exceeding the set amount is supplied from the return line 25 to the mixer 2.
1 is returned.

[0003]

However, in such a conventional dam grout circuit, the grout material accumulates and solidifies in the piping line with time, and this solid material peels off and returns from the return line 25. And has the disadvantage of damaging the device. Therefore, conventionally, the work of removing solids is regularly performed, which is one of the causes of an increase in workers and costs. The present invention has been made in view of the above circumstances, and aims at preventing damage to the apparatus by crushing solids that have accumulated and separated in a line and reducing the number of workers.

[0004]

In order to achieve the above object, the present invention is characterized in that a crusher is interposed in a return line of a dam grout circuit in a dam grout injection method.

[0005]

Since the return line is provided with a crusher, even if solids are separated and flow into the return line, they are crushed (crushed) by the crusher. Therefore, the apparatus is not damaged, and the number of workers can be reduced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the illustrated embodiments. FIG. 1 is a schematic explanatory view showing an embodiment of the present invention, wherein 1 is a mixer, 2 is a grout pump, 3 is a valve box, 4 is a borehole valve, 5 is a return line, and 6 is a return line 5. Crusher (crushing equipment)
It is.

In the mixer 1, a predetermined material is added at a predetermined mixing ratio and kneaded to produce a grout material. This grout material is supplied to the valve box 3 by the grout pump 2.
And, it is supplied to the drilling via the drilling hole valve 4.

The valve box 3 is provided with a return valve. The injection flow rate and the injection pressure are set in advance, and are automatically controlled by the return valve so as to obtain the values. Returned to 1.

FIG. 2 is a sectional view showing an example of the valve box 3, and shows a line 8 connected from the grout pump 2.
Is branched into a supply line 9 and a return line 5, the supply line 9 is provided with an injection flow rate detector 10 and an injection pressure detector 11, and the return line 5 is provided with a return valve 7.

The return valve 7 is activated when the injection flow rate and the injection pressure have been set in advance, and the grout material exceeding the set amount is returned to the mixer 1 through the return line 5.

The injection flow rate detector 10 includes an electromagnetic flow rate transmitter 1
2, a voltage proportional to the flow rate generated is converted into a current signal by the electromagnetic flow rate converter 13 and detected. Further, the injection pressure detector 11 sends the pressure of the fluid to the pressure detector 15 via the diaphragm 14 to generate a voltage signal proportional to the pressure, and converts this voltage into a current signal with a pressure converter and detects it. is there.

A crusher 6 interposed in the return line 5 is a crushing device for crushing (crushing) solids. To return.

Thus, according to the above embodiment, the mixer 1
Is supplied from the grout pump 2 from the line 8 to the drilling via the valve box 3, the line 9 and the drilling hole valve 4.

When the supplied grout material exceeds a preset injection flow rate and injection pressure, the return valve 7 operates to return the excess grout material to the mixer 1 through the return line 5.

The returned grout material passes through the crusher 6 and is crushed by the crusher 6 if solid matter is mixed therein. Therefore, even if the solid matter is mixed, the apparatus is prevented from being damaged, and the work of removing the solidified deposit of the grout material is not required.

[0016]

As described in detail above, according to the present invention, since the solid is crushed by the crusher, damage to the apparatus by the solid is prevented. Therefore, there is no problem even if the grout material solidifies and adheres to the inside of the pipe line, peels off and becomes a solid material and flows to the return line. For this reason, the operation of removing the solidified deposits is not required, which helps to reduce the number of workers and the cost.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing an example of a valve box.

FIG. 3 is a schematic explanatory view showing a conventional example.

[Explanation of symbols]

 Reference Signs List 1 mixer 2 grout pump 3 valve box 4 drill hole valve 5 return line 6 crusher 7 return valve

Claims (1)

(57) [Scope of request for utility model registration] 1. A dam grout circuit in a dam grout injection method, wherein a crusher is interposed in a return line of the dam grout circuit in the dam grout injection method.