JPS584800B2 - Shielding structure for high temperature fluids - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high temperature fluid shielding structure for protecting structures of an atomic couplant or a general plant from high temperatures.

Figures 1a, 1b, Ic, and 2 are conventional shielding structures for high-temperature fluids. Figure 1a is a plan view, and Figure 2 is a schematic diagram showing a part of a three-dimensional corner. , FIG. 1b is a sectional view taken along line A--A in FIG. 1a, and FIG. 1c is a sectional view taken along line B--B in FIG. 1a.

In FIGS. 1a, 1b, and 1c, reference numeral 4 represents a structure (or container), 2 represents a plate, and 3 represents a support member for the plate 2.

Since the inner space 6 is at a high temperature, in order to protect the structure 4 from the high temperature, a cooling fluid may be passed through the space 5, or
Or fill with insulation.

Since the plate 2 becomes hotter than the structure 4 and generates thermal stress due to thermal expansion, bellows-shaped expansion joints 1X and 1y are used to alleviate this and isolate the space 5 and inner space 6 without leakage. They are arranged in a cross shape with each other.

In an expansion joint arranged in this way, at a point away from the expansion joint, for example at point a in Figure 1a, thermal expansion in both the vertical and horizontal directions can be absorbed by the expansion joint of 1y and lx, respectively, but at a point on the center line of the expansion joint At points b or C (as well as positions near points b and c), thermal expansion in either the vertical or horizontal direction cannot be absorbed, and there is a disadvantage that strain is applied to the intersection of the bellows. The same holds true for the three-dimensional case shown in FIG.

The present invention eliminates the above-mentioned drawbacks, makes it possible to absorb thermal displacement in both vertical and horizontal directions, and is used in key locations that require reliability. Therefore, in the present invention, the bellows are orthogonally arranged and In this case, one bellows is penetrated so as not to impair the expansion and contraction function, and as a whole, it is possible to absorb thermal displacement in both vertical and horizontal directions at any position.

Hereinafter, actual examples of the present invention will be explained in detail with reference to the accompanying drawings.

Fig. 3a is a plan view showing the structure of the high temperature fluid shielding structure of the present invention, Fig. 3b is a sectional view taken along the line A-A in Fig. 3a, and Fig. 3c is a sectional view taken along the line B-B in Fig. 3a. FIG.

In the figure, symbols 1X and 1y are bellows (expansion joints)
, 2 is a plate (seal plate), 3 is a support material, 4 is a structure (or vessel), 5 is a space (cooling fluid path or insulation material space), and 6 is an inner space (for example, a reactor vessel chamber).

The inner space 6 is generally at a high temperature and a cooling fluid path (or insulation space) 5 is provided to protect the less heat resistant structure (or container) 4 from high temperatures.

A plate 2 is provided to airtightly separate the space 5 and the inner space 6 from each other.

This plate 2 is supported by a support member 3 so as to be safe against internal or external pressure and external forces such as gravity and earthquakes.

However, when forced cooling is performed through cooling fluid, the support material 3 should have a structure suitable for a cooling path with little pressure loss.

Since the plate 2 is at a higher temperature than the structure 4, thermal stress is generated due to thermal expansion.

The bellows 1x, 1y are arranged in the vertical and horizontal directions as shown in Fig. 3a, and the bellows 1X in one direction at the crossing position, for example, the bellows 1X at the d position, absorbs the original expansion and contraction in the xx direction even in the crossing position. It penetrates so that it has a function.

On the other hand, the bellows 1y in the direction perpendicular to this is divided into two by 1X, and its terminals have a closed structure to prevent leakage.

That is, although the bellows 1y extends to the vicinity of the bellows 1X, the bellows 1y does not connect with the portion of the bellows 1X having a bellows expansion/contraction function (ie, the abdomen and top of the bellows) at the intersection of both bellows.

At the diagonal position g of d, the angle lx is similar to the position d.
, 1y are arranged.

Next, at the e1 and f positions adjacent to d, a bellows 1y is arranged to penetrate so as to have an expansion/contraction absorbing function in the yy direction, and the bellows 1X in the direction perpendicular to this is divided into two by the bellows 1y. The Rose 1x terminal has a closed structure to prevent leakage.

Figures 3a, 3b, and 3c show the case where the number of bellows is one, but if the amount of expansion and contraction is large, a bellows with multiple numbers of threads is used as in a normal bellows. do.

As an example, FIG. 4a shows a cross section when two bellows are used.

FIG. 4b shows a modified structure of the cross-connections of both the vertical and horizontal bellows.

FIG. 4c shows a cross section when a two-ply bellows is used as an example of a plurality of bellows.

5, 6a, 6b, and 6c are examples of three-dimensional arrangement, and FIG. 6a is a cross section taken along line A-A in FIG.
6b shows a cross section taken along line B-B in FIG. 5, and FIG. 6c shows a cross section taken along line C-C in FIG.

FIG. 7a also shows the case of a three-dimensional arrangement, but a bellows dedicated to the corner is used at a part of the corner.

FIG. 7b shows a cross section taken along line A--A in FIG. 7a.

Fig. 8a shows an example in which vertical and horizontal bellows are arranged in a T-shape, and Fig. 8b shows a cross section taken along line A--A in Fig. 8a.

Next, the operation of the present invention will be explained.

3a, 3b, and 3c, plate 2 undergoes longitudinal (yy direction) and lateral (xx direction) thermal displacement, and this thermal displacement occurs at representative positions of plate 2. It is absorbed by the bellows as follows.

(1) At any position a away from the bellows: xx
The thermal displacement in the direction and the yy direction are respectively 1x and l.
It is absorbed by y.

(2) At any position h close to both bellows: xx
The directional thermal displacement is absorbed by the bellows 1X passing through g on the right side of Fig. 3a, since the end of the bellows 1X near h is closed and has no expansion/contraction absorbing function.

The thermal displacement in the yy direction is caused by the bellows 1 passing through f close to h.
absorbed by y.

(3) At any position b on the center line of the bellows 1X: Thermal displacement in the xx direction is absorbed by 1X passing through b.

Thermal displacement in the yy direction is absorbed by the bellows 1y passing through the intersection e in the xx direction.

(4) At any position C on the center line of the bellows 1y: Thermal displacement in the yy direction is absorbed by the bellows 1y passing through C.

Thermal displacement in the xx direction is absorbed by the bellows 1X passing through the intersection d in the yy direction.

(5) At intersections d, e, f, and g of bellows: At position d, thermal displacement in the xX direction is absorbed by the bellows 1X passing through d in the yy direction.

Thermal displacement in the yy direction is absorbed by the bellows 1y, which is perpendicular to the bellows 1X and passes through the adjacent intersection f.

At other intersections e, f, and g, XX, yy
Absorbs thermal displacement in both directions.

As mentioned above, typical positions a, b, c, d, e, f, g
, h, it is possible to absorb the thermal displacement in the longitudinal and lateral directions.
It can absorb thermal displacement and relieve thermal stress at any position.

4a to 8b are combinations and applications of FIG. 3a, so thermal displacement in the longitudinal and lateral directions can be absorbed at any position in the drawings as well.

In the conventional structure (Figs. 1a, 1b, and 1c), the bellows has vertical and horizontal positions on the center line (e.g., b, C in Fig. 1a) and near the center line (positions b, c in Fig. 1a). However, according to the present invention, as shown in Fig. 3a, the bellows in one direction can absorb the original expansion and contraction even in the crossing position, as shown in Fig. 3a. The split bellows, which penetrate through the bellows to have a function, and which are perpendicular to the bellows, have a leak-free closed structure at the end, so that the bellows can be used in both vertical and horizontal directions at any position, as explained in the operation section. It is possible to absorb thermal displacement and maintain it without leakage.

[Brief explanation of the drawing]

Fig. 1a is a schematic plan view of a conventional high-temperature fluid shielding structure, Fig. 1b is a sectional view taken along the line A-A in Fig. 1a, and Fig. 1c is a cross-sectional view taken along the line B-B in Fig. 1a. 2 is a schematic diagram showing a part of a corner of the same structure in a three-dimensional case, FIG. 3a is a schematic diagram in a planar case of the high-temperature fluid shielding structure according to the present invention, and FIG. 3c is a sectional view taken along line AA in the figure, FIG. 3c is a sectional view taken along line BB in FIG. , Fig. 4b is a cross-sectional view when the structure of the intersection or contact portion of both vertical and horizontal bellows is changed, Fig. 4c is a cross-sectional view of an example in which a two-ply bellows is used as an example of a multi-ply bellows, and Fig. 5 The figure is a schematic diagram when the present invention is arranged three-dimensionally, FIG. 6a is a cross-sectional view taken along the line A-A in FIG. 5, and FIG. 6b is a cross-sectional view taken along the line B-B in FIG. 5.
Figure 6C is a sectional view taken along line C-C in Figure 5;
Figure a is a schematic diagram of a state in which bellows exclusively for corners are used in a part of the corner in the case of a three-dimensional arrangement, Figure 7b is a cross-sectional view taken along the line A-A in Figure 7a, and Figure 8a is a diagram of vertical and horizontal bellows. FIG. 8b is a cross-sectional view taken along line A--A in FIG. 8a. 1x, 1y...Bellows (expansion joint), 2...
...Plate (seal plate), 3...Support material, 4.
... Structure (or container), 5 ... Space (cooling fluid path or insulation material space), 6 ...
・Inner space.

Claims (1)

[Claims] 1 Consisting of a plurality of rectangular pieces arranged on substantially the same plane and a plurality of tongue members that close the gap between the opposing circumferential edges of the adjacent pieces and elastically allow the pieces to approach and separate from each other. , one of the tongue members extending in a direction crossing each other is extended to a close portion of the other tongue member, and at the intersection of both tongue members, the one tongue member is connected to the other tongue member. Begout: A high-temperature fluid shielding structure that is characterized by not being connected to a part that has an expansion and contraction function.