JP5919754B2 - Deformation sound suppression structure due to thermal expansion of metal plate roof of water supply reservoir, metal plate roof unit of water supply reservoir and water supply reservoir - Google Patents

Description

The present invention relates to a structure for suppressing deformation noise due to thermal expansion of a metal plate roof of a water supply reservoir, a metal plate roof unit of a water supply reservoir , and a water supply reservoir , and in particular, to a stainless steel plate roof of a rectangular distribution reservoir. It is related with the deformation | transformation sound suppression structure by the thermal expansion of the metal plate roof of a water supply reservoir suitable for, the metal plate roof unit of a water supply reservoir, and a water supply reservoir .

  For the purpose of maintaining the water quality of the stored water, a square water reservoir made of stainless steel plate may be provided. In general, a highly corrosion-resistant stainless steel thin plate is used for the metal plate constituting the roof provided in the gas phase portion of the distribution reservoir in order to withstand a severe environment due to the concentration of chlorine gas generated from tap water. In order to counter the loading load, design using bending by rolls and reinforcement by ribs, etc. is performed, but the roof plate becomes constrained due to the entire welded structure with the bottom plate and side walls, and excessively due to temperature rise and solar radiation When the heat expands, it jumps and buckles, and this deformation generates a sound like a drum hitting sound. This is considered to be a sound generated by a portion of the roof plate that is expanded by heat being deformed in a direction opposite to the arch shape of the bowl-shaped roof.

  In recent years, large-scale stainless steel square prismatic reservoirs have been constructed. However, since the roof area becomes large, the deformation sound due to the thermal expansion of the roof plate cannot be ignored.

  As with the present application, as a technique for absorbing expansion and contraction due to thermal expansion, Patent Documents 1 and 2 describe a roof plate coupling mechanism having a folded plate structure, and Patent Document 3 has a long length that substantially bisects a roof material. A technique is described in which a slit is formed and an elastic material that absorbs stress applied to the roof is integrally attached in the slit.

JP 2004-164420 A Japanese Patent Laid-Open No. 10-82142 JP-A-8-193388

  However, the techniques described in Patent Documents 1 and 2 have a problem that the structure is provided at the connecting portion of the roof plate and the structure is complicated.

  On the other hand, the technique described in Patent Document 3 has a problem in that it is necessary to provide an elastic material in the slit, and it is difficult to ensure corrosion resistance equivalent to that of a roof plate.

The present invention has been made to solve the above-described conventional problems, and has a corrosion resistance equivalent to that of a roof plate, and is a lightweight and low-cost expansion / contraction mechanism that deforms due to thermal expansion of a metal plate roof of a water distribution reservoir. The problem is to suppress sound.

The present invention, a plurality of locations of the expansion for absorbing deformation due to thermal expansion of the metal plate and the metal roof plate and a bottom plate and side walls constitute a shingle for water distribution reservoir formed in all-welded construction the roof plate while disposed, of the roof plate separately from the bottom of the expansion by the kite is provided an elastic mechanism consists of a bellows-like metal plate is obtained by solving the above problems.

Here, the metal plate which comprises the said expansion-contraction mechanism can be made into the same material as the metal plate which comprises the said roof board.

The present invention also provides a metal plate roof unit for a water supply reservoir , wherein the telescopic mechanism is provided.

The present invention also provides a water supply reservoir comprising a metal plate roof having the above-described deformation noise suppressing structure.

According to the present invention, since the press working stretch mechanism metal plate bellows is deformed like bellows, absorbing the deformation due to thermal expansion, to suppress the generation of through buckling, the sound caused by the deformation of the roof plate Can be reduced. Further, the expansion mechanism so using a metal plate, can have the same corrosion resistance and shingles, can use the water for water distribution pond to chlorine is required. Furthermore, since the expansion / contraction mechanism can be designed with a thin plate, it is possible to reduce deformation noise at a light weight and at a lower cost than a structure that increases rigidity and prevents deformation.

The top view which shows the whole structure of the distribution reservoir to which this invention is applied Similarly, an elevation view and a sectional view showing an enlarged main part Similarly, a perspective view of the entire roof plate The perspective view which shows the structure of 1st Embodiment of this invention which shows the left half of a roof board Similarly, a plan view of part of the roof plate Cross-sectional view along line VI-VI in FIG. Cross-sectional view showing the main configuration of the second embodiment of the present invention Cross-sectional view showing the main configuration of the third embodiment of the present invention

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

  FIG. 1 is a plan view of the entire structure of a distribution reservoir to which the present invention is applied, FIG. 2 is an elevation view and a cross-sectional view thereof, and FIG. 3 is a perspective view of the entire roof plate.

  The distribution reservoir which is an object of the present invention has a rectangular shape as shown in FIG. 1 and, for example, an arched roof plate 14 with respect to the bottom plate 10 and the side wall 12 formed of an upper portion 12U and a lower portion 12L as shown in FIG. Are joined by welding. In the figure, 16 is a roof column, and 18 is an internal tension member.

  Here, the bottom plate 10 and the lower side wall 12L, which are the liquid phase part, are made of, for example, SUS316 or SUS304 stainless steel plate, and the roof plate 14 and the upper side wall which are gas phase parts that need to withstand harsh environments due to the concentration of chlorine gas. 12U is made of, for example, a SUS329J4L stainless steel plate.

In the first embodiment of the present invention, as shown in the left half of the roof plate in FIG. 4, the portion of the expansion 14E provided between the roof plates 14 is shown in FIG. 5 (plan view) and FIG. As shown in the cross-sectional view along line VI), a metal plate roof unit 22 provided with an expansion / contraction mechanism 26 obtained by pressing the same stainless steel plate as the roof plate 14 into a substantially U shape is disposed. In the figure, 24 is a reinforcing rib, and 30 is a welding position.

  The expansion / contraction mechanism 26 has the same corrosion resistance as that of the roof plate by using the same high corrosion resistance steel as that of the roof plate in order to ensure the corrosion resistance to the tap water stored in the distribution reservoir.

With this structure, the expansion and contraction mechanism 26 is deformed in a bellows shape with respect to the thermal expansion of the roof plate 14, so that the occurrence of sound due to the deformation of the roof plate can be reduced by suppressing the occurrence of jump buckling. .

  The expansion / contraction mechanism 26 can be inserted, for example, every about 10 m.

  In the present embodiment, the telescopic mechanism 26 is inserted when the metal plate roof unit 22 is manufactured at the factory. Therefore, by welding the metal plate roof units 22 at the welding position 30 at the time of field installation work, construction can be performed in the same manner as a conventional roof.

  Even at the time of manufacturing the factory, the expansion / contraction mechanism 26 can be inserted without using a special construction method or machine or the like by adding a step of welding the expansion / contraction mechanism 26 to the roof member by welding to the conventional manufacturing method. it can.

  In the present embodiment, since the expansion / contraction mechanism 26 has a simple U shape, manufacturing is easy and the number of plates may be small.

In addition, it is good also as an ohm ((omega | ohm)) shape like 2nd Embodiment shown in FIG. An ohmic shape is more preferable because stress concentration generated at the bottom of the expansion 14E provided between the roof plates 14 can be eliminated. Moreover, the said expansion-contraction mechanism can be arrange | positioned at the expansion bottom part of a metal plate roof.

  Alternatively, a plurality (two in FIG. 8) may be arranged as in the third embodiment shown in FIG.

  In the said embodiment, although this invention was applied to the rectangular rectangular reservoir roof, the shape of a reservoir is not limited to a rectangle, Other shapes, such as a square and a hexagon, may be sufficient. The material of the metal plate is not limited to stainless steel.

DESCRIPTION OF SYMBOLS 10 ... Bottom plate 12 ... Side wall 14 ... Roof plate 14E ... Expansion 22 ... Metal plate roof unit 26 ... Extension mechanism 30 ... Welding position

Claims (4)

With placing expansion for absorbing deformation due to thermal expansion of the metal plate and the metal roof plate and a bottom plate and side walls constitute a shingle for water distribution reservoir formed by all-welded structure at a plurality of said roof plate the expansion of the bottom portion the roof plate separately from the deformation sound reduction structure due to thermal expansion of the metal plate roofs for water distribution reservoir, wherein the kite is provided a telescopic mechanism consisting of a bellows-shaped metal plate. The metal plate constituting the telescopic mechanism, deformation sound due to thermal expansion of the metal plate roofs for water distribution reservoir according to claim 1, characterized in that it is the same material as the metal plate constituting the roof plate Suppression structure. A metal plate roof unit for a water supply reservoir, wherein the telescopic mechanism according to claim 1 or 2 is provided. Water for distributing reservoir, characterized in that it comprises a metal plate roofs having a modified sound reduction structure according to claim 1 or 2.

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