JP2923792B2 - Remaining container processing method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method and an apparatus for treating residual concrete used for treating concrete remaining in a concrete transport pipe after completion of a concrete pumping operation by a concrete pump. It is about.

2. Description of the Related Art In the construction of a high-rise building or the like, when concrete is poured into a concrete placing place at a high place, as shown in an example in FIG. 3, a mixer truck is mounted on a hopper 2 of a concrete pump 1 placed on a construction site. When more concrete is supplied, the concrete in the hopper 2 is sucked by the concrete pump 1 and discharged into the concrete transport pipe 3, and after being pumped through the concrete transport pipe 3, the concrete is discharged at the concrete placing site. The concrete is cast.

When the concrete in the hopper 2 is sucked by the concrete pump 1, the concrete is discharged from the tip of the concrete transport pipe 3 through the concrete transport pipe 3 and the concrete is poured, and the concrete placing operation is performed. Is completed, the concrete remains in the concrete transport pipe 3, so if left as it is, the concrete in the concrete transport pipe 3 solidifies and adheres, cannot be removed, and cannot be used again. After the concrete placing operation is completed, it is necessary to treat the concrete remaining in the concrete transport pipe 3 (hereinafter referred to as residual concrete), that is, to wash the concrete transport pipe 3.

Conventionally, as a method of treating the remaining concrete, the end of the concrete transport pipe 3 is detached from the hopper 2, a pipe cleaning tool such as a sponge is packed therein, and water is applied from a water pump to transport the pipe cleaning tool to the concrete. It is pushed into the tip of the pipe 3 so that the remaining concrete in the concrete transport pipe is pushed out from the tip.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional method of treating the remaining concrete, there is a problem of where to take the concrete extruded from the tip of the concrete transport pipe, and the remaining concrete is extruded. Since water remains in the concrete transport pipe 3 after
There is also a problem how to treat this water without polluting the surroundings.

In view of the above, the present invention provides a method of discharging remaining concrete in a concrete transportation pipe without using water, allowing the remaining concrete to be returned to a mixer truck, and eliminating the problem of environmental pollution. It is intended to provide a processing method and apparatus.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a T-shaped pipe having a branch port provided at an intermediate portion between a hopper and an end portion of a concrete transport pipe, An opening / closing valve for opening / closing the conduit of the concrete transport pipe is provided at a position close to the T-shaped pipe on the end side of the concrete transport pipe. After opening the open / close valve at the tip of the concrete transport pipe and closing the branch port of the T-tube, the concrete pump is operated in reverse to return the remaining concrete in the concrete transport pipe into the hopper. Then, the on-off valve at the end side of the concrete transport pipe is closed, and a remaining condenser return pipe is connected to the branch port of the T-shaped pipe, so that the inside of the residual condenser return pipe and the inside of the hopper are communicated. After that, the remaining concrete returned to the hopper is discharged through the T-tube and the remaining concrete return pipe by rotating the concrete pump in the normal direction to provide a method and an apparatus for processing the remaining concrete.

[Action] Connect a return pipe to the branch of the T-shaped pipe, fill the tip of the concrete transport pipe with a cleaning tool, close the open / close valve in the middle of the return pipe, and open / close the end of the concrete transport pipe. When the valve is opened and the concrete pump is operated in reverse, the remaining concrete in the concrete transport pipe is sucked by the concrete pump and once returned to the hopper. Open the open / close valve in the middle of the return pipe, close the open / close valve located at the end of the concrete transport pipe, rotate the concrete pump forward, and leave the residual condenser from the T-tube branch. Drain through the condenser return pipe and return the residual condenser to the mixer truck. The above operation is repeated to treat the remaining concrete in the concrete transport pipe without using water.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. As shown in FIG. 3, concrete supplied into a hopper 2 of
And discharges the concrete into the concrete transport pipe 3, and presses the inside of the concrete transport pipe 3 and discharges it from the tip to perform concrete placement.
Between the hopper 2 of the concrete pump 1 and the concrete transport pipe 3, a T-shaped pipe 4 provided with a branch port 4a at an intermediate portion is interposed. A blind flange 5 (see FIG. 2) for closing and a remaining condenser return pipe 7 connected to the branch port 4a of the T-tube 4 for returning the remaining condenser to the mixer wheel 6 during the residual condenser processing. Further, a cylinder-driven rotary valve 8 is provided at a position near the T-shaped pipe 4 of the concrete transport pipe 3 as an opening / closing valve for opening and closing the conduit of the concrete transport pipe 3. A pin valve 9 is mounted in the middle of the remaining condenser return pipe 7 as an open / close valve for opening and closing the conduit of the remaining condenser return pipe 7.
Reference numeral 10 denotes a cleaning tool such as a sponge packed at the tip of the concrete transport pipe 3 at the time of the residual concrete treatment.

The return pipe 7 includes a residual condenser return pipe 11 formed by appropriately connecting a straight pipe or a curved pipe, a pin valve 9 serving as an open / close valve for opening and closing the conduit of the residual condenser return pipe 11, and the residual condenser Although the adapter pipe 12 is provided for attaching and detaching the return pipe 7 to and from the branch port 4a of the T-tube 4, the adapter pipe 12 may not be provided.

In the case of concrete casting, as shown in FIG. 2, a blind flange 5 is attached to the branch 4a of the T-tube 4 to close the branch 4a, and the rotary valve 8 is opened. . When the concrete pump 1 is operated in this state, the concrete in the hopper 2 is sucked by the concrete pump 1 and then the concrete transport pipe 3 through the T-tube 4.
And discharged from the tip through the concrete transport pipe 3.

When the remaining concrete in the concrete transport pipe 3 is to be treated after the concrete placing operation is completed, the rotary valve 8
Is closed, and the blind flange 5 closing the branch port 4a of the T-tube 4 is removed, and instead, as shown in FIG.
Attach the remaining condenser return pipe 7 and
The mixer truck 6 is positioned corresponding to the tip of the concrete transport pipe 3, and further, the cleaning tool 9 is packed into the concrete transport pipe 3 from the tip. In this state, the rotary valve 8 is opened,
Also, the pin valve 9 is closed, and the concrete pump 1 is first operated in reverse. When the concrete pump 1 is operated in reverse, the remaining concrete in the concrete transport pipe 3 is sucked into the concrete pump 1 and returned to the hopper 2. When the inside of the hopper 2 is full of remaining concrete,
Next, the rotary valve 8 is closed and the pin valve 9 is opened, and the concrete pump 1 is operated in the normal rotation. When the concrete pump 1 is operated in the forward direction, the remaining condenser in the hopper 2 is pushed out from the branch port 4a of the T-shaped pipe 4 into the remaining condenser return pipe 7 because the rotary valve 8 of the concrete transport pipe 3 is closed. Is returned to the mixer wheel 6 through the remaining condenser return pipe 7. When the level of the remaining concrete in the hopper 2 decreases due to the normal operation of the concrete pump 1,
Next, the rotary valve 8 is opened and the pin valve 9 is closed, the concrete pump 1 is again operated in reverse, and the remaining remaining concrete in the concrete transport pipe 3 is returned into the hopper 2. Thereafter, the above process is repeated an appropriate number of times to remove the remaining concrete in the concrete transport pipe 3 from the remaining concrete return pipe 7.
Through the mixer wheel 6. Further, when the remaining concrete flows backward in the concrete transport pipe to the hopper 2 side, the cleaning tool 9 is also slid, so that the inside of the concrete transport pipe 3 is simultaneously cleaned by the cleaning tool 9. Since the position of the cleaning tool 9 can be easily confirmed by hitting the pipe, the operation is completed when the position of the cleaning tool 9 is confirmed between the T-tube 4 and the hopper 2.

In the above, since the residual concrete returned to the mixer wheel 6 does not contain water for extruding the residual condenser as in the related art,
It can be effectively used at other casting sites. Further, since no water is used, the surrounding environment is not polluted.

In the above embodiment, a cylinder-driven rotary valve is used as a valve for opening and closing the concrete transport pipe. However, a manual rotary valve or another open / close valve may be used. Instead of the pin valve, a rotary valve or another open / close valve may be used as the valve for opening / closing the condenser return pipe. Of course, various changes may be made without departing from the scope of the present invention. It is.

[Effects of the Invention] As described above, according to the present invention, a T-shaped pipe having a branch port provided at an intermediate portion is interposed between a hopper and an end of a concrete transportation pipe, thereby forming an end of the concrete transportation pipe. An opening / closing valve for opening and closing the conduit of the concrete transport pipe is provided at a position close to the T-shaped pipe on the side of the section, and after the concrete placing operation is completed, a cleaning tool is packed at the tip of the concrete transport pipe, and After opening and closing the open / close valve at the tip of the concrete transport pipe and closing the branch port of the T-tube, the concrete pump is operated in reverse to return the remaining concrete in the concrete transport pipe into the hopper. Close the open / close valve at the end of the transport pipe, and connect the remaining condenser return pipe to the branch port of the T-shaped pipe,
After communicating the inside of the remaining condenser return pipe with the inside of the hopper, the remaining condenser returned into the hopper is discharged through the T-tube and the residual condenser return pipe by operating the concrete pump in the normal direction. Since it is a treatment method and apparatus, the remaining concrete in the concrete transport pipe can be returned to the mixer truck without using water, thereby allowing the concrete returned to the mixer to be used as it is at another site. It does not pollute the vicinity because it does not use water.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an embodiment of a residual concrete processing apparatus of the present invention, FIG. 2 is a schematic view of a blind flange, and FIG. 3 is a schematic view showing an example of a concrete casting method using a concrete transport pipe. It is. 1 Concrete pump, 3 Concrete transport pipe, 4 T pipe, 4a Branch outlet, 7 Remaining return pipe, 8 Rotary valve (open / close valve), 9 Pin valve (open / close) Valve), 10 ... Cleaning tool.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B08B 9/06 E04G 21/02

Claims (2)

(57) [Claims] 1. A T-tube having a branch port provided at an intermediate portion between a hopper and an end portion of a concrete transport tube, and located at a position close to the T-tube, which is an end portion side of the concrete transport tube. Is provided with an opening / closing valve for opening and closing the conduit of the concrete transport pipe. After the concrete placing operation is completed, a cleaning tool is packed at the tip of the concrete transport pipe, and the open / close valve at the position of the concrete transport pipe tip is located. Open it, and
After closing the branch port of the T-tube, the concrete pump is operated in reverse to return the remaining concrete in the concrete transport pipe into the hopper, and then the on-off valve at the end side of the concrete transport pipe is closed, and After connecting the remaining condenser return pipe to the branch port of the T-shaped pipe and communicating the inside of the remaining condenser return pipe with the inside of the hopper, the concrete pump is rotated forward with the remaining condenser returned into the hopper. A method for treating residual concrete, wherein the waste is discharged through a T-tube and a residual condenser return pipe. 2. A T-shaped pipe having a branch port at an intermediate portion is interposed between a hopper of a concrete pump and an end of a concrete transport pipe for transporting concrete discharged from the concrete pump to a casting site. A hopper and a concrete transport pipe through the inside of the T-shaped pipe, and a detachable return pipe for detachably connecting to the branch port of the T-shaped pipe. An on-off valve for opening and closing the return pipe is provided, and further, at a position close to the T-shape on the terminal side of the concrete transport pipe,
An apparatus for treating residual concrete, comprising an opening / closing valve for opening and closing the pipeline of the concrete transport pipe.