JPS647357B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pipe penetration block used for providing penetration holes for various measurements in a radiation-shielding concrete wall.

When piping penetrates concrete walls, floors, ceilings, etc. installed to shield radiation, radiation must not leak from the gap between the penetrating object and the concrete. Even if there were to be a leak, it would be necessary to keep the dose below safe for the human body. That is, in order to suppress leakage to a minimum, a critical issue is how to structure the penetrating object.

On the other hand, when a penetrating object is embedded in a reinforced concrete wall, the reinforcing bars placed in the wall are cut, causing a decrease in the strength of the wall. For this reason, in the past, that part was treated as an opening (defective part) and strength was maintained by placing reinforcing reinforcing bars (vertical, horizontal, diagonal, etc.) around the area. Therefore, reinforcing bars are complicated around the embedded object, and the arrangement and shape of the penetrating object are often severely restricted.

The object of the present invention is to provide a pipe penetration block that solves all of these problems.

That is, the present invention provides a pipe penetration block provided in a concrete wall for radiation shielding, which block includes (a) an outer shell plate extending in a direction substantially parallel to the pipe and surrounding the pipe; A box body formed by stacking a plurality of outer shell plates of different dimensions via partition plates to form a stepped structure, and filling the inside with a radiation shielding material that is solid at room temperature, and (b) the concrete wall. (c) a plurality of curved pipes installed through the box body in a penetrating direction substantially perpendicular to the partition plate; and (c) in the vicinity of the partition plate on the surface where the box body contacts the concrete frame. The piping penetration block is characterized in that it includes a large number of stud bolts projecting from the outer shell plate.

According to the present invention, radiation traveling straight is effectively blocked by the stepped structure of the box and the curved pipe.

Further, since the stud bolt is embedded in the concrete wall as a shear connector, and the shear force of the wall is transmitted using the penetrating block itself as a reinforcing material, a decrease in strength due to the penetrating object in the wall body is effectively prevented.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to preferred embodiments illustrated in the accompanying drawings.

1 to 5 show a first embodiment of a horizontally mounted pipe penetration block. End plates 2 are located at each end of the box with a span equal to the thickness of the shielding concrete wall. In addition, the outer shell plates 4 and 5 form a box with a stepped structure, with a partition plate 3 in between. As clearly shown in FIG. 2, the stepped structure refers to a structure in which the outer shell plate 4 and the outer shell plate 5 are not arranged on the same plane but are shifted in the right angle direction. According to this, between the contact points between the outer shell plates 4 and 5 and the lead 8 filled inside them (between the interface between the outer shell plates and the lead)
Since they are not located in a straight line, it is possible to reliably prevent radiation that travels in a straight line from leaking outside through the space. In other words, the radiation passing between the contact point between the outer shell plate 4 and the lead 8 hits the lead 8 in the section of the outer shell plate 5, and does not flow between the contact point between the outer shell plate 5 and the lead 8. . The tube 1 to be passed through this is bent as shown in FIG. 3, and is attached by fillet welding to the end plate 2 when the box is assembled. Therefore, holes are made in the end plate 2 and the partition plate 3 prior to assembly, through which the bent pipe can pass.

Although the partition plate 3 and the curved pipe are not welded, they serve as a guide for the curved pipe passing through and an intermediate support point for the curved pipe. In order to further ensure radiation shielding, the plurality of curved tubes 1 are arranged in a triangular position relative to each other as shown in FIGS. 4 and 5.

The outer shell plates 4 and 5 are U-shaped in this embodiment as shown in Figs. 4 and 5, but since this becomes a low part when embedded in a concrete wall, they are shaped so that concrete can easily flow into them. .

This box was filled with radiation shielding material 8 such as lead, cooled and solidified, and then a cover plate 6 was attached, but the cover plate may not be provided.

This piping penetration block has a large number of stud bolts 7 protruding from the surfaces of the outer shell plates 4 and 5, particularly in the vicinity of the partition plate 3. When a piping penetration block with such a configuration is embedded in concrete, a stud bolt or shear connector on one side is connected to a stud bolt or shear connector on the other side through the partition plate 3 that penetrates the outer shell plates 4 and 5. , it is possible to effectively transmit the shear force of the wall.

Further, it is convenient to provide a hole in the upper part of the partition plate 3 for hanging a lifting hook.

The second embodiment shown in FIGS. 6 to 10 is a vertically mounted type of piping block;
Parts that are the same or similar to those in the embodiments are designated with the same reference numerals.

What should be noted in this embodiment is that the bent pipe has one step as shown in FIG. 8, and therefore, this step is suppressed by one partition plate 3. The outer shells 4 and 5 are not U-shaped but flat (FIGS. 7 and 9). The functions of this embodiment are completely the same as those of the first embodiment except for the vertical mounting.

The effects of the block of the present invention are listed below.

(b) Rather than directly embedding the pipes in shielding concrete, radiation leakage can be reduced several times by passing a plurality of curved pipes together into a box filled with radiation shielding material such as lead as in the present invention. can.

(b) Since radiation travels in a straight line, the structure of the penetrating object should be changed as in the present invention (i) make a box with a stepped structure, (ii) bend the penetrating pipe, and (iii) place lead etc. as a shield inside the box. By filling the radiation shielding material with the radiation shielding material, the radiation shielding effect can be further enhanced.

(c) The structure of the piping penetration block is such that shear connectors are provided on the surfaces of the outer shell plates 4 and 5, and the shear force of the wall is transmitted to the shear connector on the opposite side via the partition plate 3 that penetrates the outer shell plates. By embedding this in the wall, it is possible to maintain the strength of a reinforced concrete wall, eliminate the need for surrounding reinforcing bars, prevent complications in reinforcing bars, and increase the degree of freedom in the placement and shape of penetrating objects. Become.

(c) Directly embedding a bare pipe in concrete may not necessarily cause damage to the pipe surface, so the method of embedding the pipe in a box as in the present invention is far superior in terms of quality.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the first embodiment of the present invention;
The figure is a sectional view taken along the - line, Figure 3 is a sectional view taken along the - line in Figure 2, and Figure 4 is a sectional view taken along the - line in Figure 3.
5 is a sectional view taken along the - line of FIG. 3, FIG. 6 is a perspective view of the second embodiment of the present invention, FIG. 7 is a horizontal sectional view thereof, and FIG. Its vertical sectional view, FIG. 9 is a sectional view taken along the - line in FIG. 8, and FIG. 10 is a sectional view taken along the - line in FIG. 1...Bent pipe, 2...End plate, 3...Partition plate, 4,
5... Outer shell plate, 6... Lid plate, 7... Stud bolt, 8... Radiation shielding material such as lead.

Claims (1)

[Claims] 1 A piping penetration block provided in a concrete wall for radiation shielding, which block includes (a) an outer shell plate with dimensions extending substantially parallel to the piping and surrounding said piping, and having different dimensions; A box body formed by stacking a plurality of outer shell plates with partition plates in between to form a stepped structure, and filling the inside with a radiation shielding material that is solid at room temperature; (c) said piping in the form of a plurality of curved pipes that penetrate through said box body and are installed substantially orthogonally to said partition plate; and (c) said outer shell plate in the vicinity of said partition plate on the surface where said box body contacts the concrete frame. A piping penetration block characterized by comprising a large number of stud bolts protruding from the piping block.