JPS6129847B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing concrete-lined containers, such as concrete-lined drums, for containing radioactive waste.

Conventionally, when manufacturing this type of container, 3 to 3
The method used was to assemble a formwork divided into four parts, insert and fix it into the main body of a container such as a drum, and then disassemble the formwork again and remove it after a considerable hardening time after pouring concrete. .

However, such methods require disassembly and
Not only is the work efficiency low due to assembly, but the
Since the formwork is divided into four parts, the quality of the product varies and accuracy is poor, and there are various problems such as poor operability of the formwork due to waiting time for the concrete to harden (usually about 1 to 2 days). It was hot.

In order to eliminate the above-mentioned problems, the present invention
It eliminates the disassembly and assembly work of the formwork, making it easy to attach and remove the formwork, and requires only a short time to wait for concrete to harden, making it suitable for continuous production and making it possible to manufacture concrete-lined containers of excellent quality. This provides a method that allows you to do so.

Hereinafter, the present invention will be explained with reference to the drawings.

Reference numeral 1 denotes a metal cylindrical housing frame into which an air supply pipe 2 is inserted and fixed. A check valve 3 made of a rubber plate or the like capable of closing the lower end port 2a of the air supply pipe is provided. The upper surface of the formwork 1 is formed into a substantially conical shape, and the center part is connected to the air pipe 2.
It is fixed in the middle. In addition, the air pipe 2 of the formwork 1
Installation is done by welding, etc.

Above the air supply pipe 2 is an air inlet 4 into the pipe 2.
is provided, and a hanging fitting 5 is attached to the head.

Reference numeral 6 denotes a planar cross-shaped support rod disposed on the upper side of the formwork 1, and is horizontally fixed to the air pipe 2 passing through the center thereof, and a drum can or the like is placed on the lower surface of the rod 6 toward the outside. A guide portion 8 that matches the inner diameter of the upper edge of the container body 7 is provided in a protruding manner, and clamping fittings 10 for clamping the upper edge curled portion 9 of the container body 7 are attached to each end of the rod 6.

In order to line the drum 7 with concrete, the drum 7 is first placed on the vibration table 11 with its opening facing up, and the housing frame 1 is inserted into the can 7. If necessary, the formwork 1 is suspended from the can 7 while the hanging fitting 5 at the upper end of the air pipe 2 is suspended by the hanging rope 12.
Insert inside. When hanging the support rod 6 on the upper edge of the drum can 7, the guide 8 on the lower surface of the rod 6 is fitted into the inner diameter of the can 7, and the curl 9 protruding outward from the upper edge of the can 7 is tightened with bolts using clamping fittings 10 to firmly tighten it. to clamp. Thereby, the formwork 1 is suspended within the can 7 by the support rods 6 and positioned at an accurate position.

Next, while operating the vibration table 11, the drum can 7 is
and formwork 1 with very hard kneading (for example, slump 0).
cm) of ready-mixed concrete 13 is poured and compacted (Fig. 3 A). Next, after curing (about 1 to 2 hours) to such an extent that the concrete 13 does not harden and collapse from the inner wall of the can 7, the metal fitting 10 that clamps the curl 9 on the upper edge of the can 7 is removed and secured to the hanging metal fitting 5. Suspension rope 12
The formwork 1 is suspended and compressed air is blown into the air pipe 2 from the upper air inlet 4, and the formwork 1 is gradually pulled out from the can 7 while being discharged from the lower end port 2a of the pipe toward the inner bottom of the drum can 7. Go (Figure 3 B, C). Formwork 1
It is preferable that the mold is not forcibly pulled out, but is pulled up using the force of pushing up the bottom surface of the formwork 1 by the air discharged from the air pipe 2. This prevents the lining concrete 13, which has not yet solidified, from collapsing. In this case, it is also possible to balance a weight that is slightly heavier than the entire weight of the above-mentioned apparatus having the formwork 1 via a pulley so that the formwork 1 is gradually floated by the discharged air.

In addition, when curing the concrete, heating may be performed if necessary, and it is preferable to apply oil to the outer surface of the formwork 1 in advance so that the formwork 1 can be easily demolded.

As described above, the present invention does not require assembling and disassembling the formwork one by one when manufacturing a concrete lined container, the structure of the formwork is simple and the manufacturing cost is low, and the molding can be removed from the bottom of the formwork. Since this is done by discharging compressed air, there is no risk of the concrete collapsing even if the mold is removed before the concrete hardens. Therefore, according to the present invention, concrete-lined containers can be manufactured in a short time, the utilization rate of the formwork is improved, continuous manufacturing is possible, and the products are of uniform quality. has advantages. It goes without saying that the present invention can also be applied to the manufacture of containers lined with metallic lead instead of concrete.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an apparatus for manufacturing a concrete lined container according to the method of the present invention, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is an explanatory diagram showing the construction order. Description of symbols 1...Formwork, 2...Air pipe, 3...Check valve, 4...Air inlet, 5...Hanging fitting, 6...Support rod,
7... Container body, 8... Guide, 9... Curl part, 10
...Holding bracket, 11...Vibration table, 12...Hanging rope, 13
…concrete.

Claims (1)

[Scope of Claims] 1. An air supply pipe is inserted and fixed into the axial center of the housing frame, and the bottom plate of the form is provided with a non-return check that is opened so as to face the lower end of the air supply pipe and can close the lower end. A valve is provided, and a support rod is horizontally attached and fixed to the upper edge of the container body to suspend the formwork inside the container body which is to be lined with concrete. 1. An apparatus for producing a concrete lined container, comprising: a compressed air blowing port into the pipe. 2. The support rod is formed in a planar cross shape, and a guide portion that matches the inner diameter of the upper edge of the container body is provided protruding from each end of the lower surface of the rod, and each end of the rod is provided with a guide portion that matches the inner diameter of the upper edge of the container body. 2. The apparatus for manufacturing a concrete lined container according to claim 1, wherein a clamping fixture for clamping the edge is attached, and a hanging fixture is provided at the head of the air pipe.