JP2006076572A - Internal reinforcement structure of top plate of cylindrical water tank or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide inexpensively a top plate structure of a storage tank such as a water tank strong against an impact generated by a sloshing phenomenon in which liquid in the tank waves by an earthquake. <P>SOLUTION: A submerged beam 4 mounted on an ear 8 of a top plate 2 of the water tank and a side plate 1 is supported by a main stay 7, portions therebetween are connected at several parts by pillars 5, and braces 6 are mounted therebetween. The top plate is formed by combining a large number of four-folded panels with one another, and each panel has an ear. A large truss beam is formed by using the top plate 2 and the submerged beam 4 by this structure. High strength is provided, no double ceiling is required by providing the submerged beam, and as the result, an inexpensive water tank can be manufactured. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a structure that can effectively reinforce a top plate such as a stainless steel cylindrical water tank and can be inexpensive.

The top plate needs to be reinforced with mold steel to support its own weight and seismic force. In the conventional aquarium, the shape steel (rafter) is arranged along the top plate. If you reinforce externally, you can use the cheap normal stainless steel SUS304, but it will damage the appearance because it goes outside. When reinforcing inside, the reinforcing material is attached to the gas phase part because it is along the top plate. Chlorine gas generated from the stored water (generated by sodium hypochlorite used for disinfection) is absorbed in the water droplets attached to the reinforcing material and concentrates, rusting the stainless steel, making it an expensive special stainless steel It was necessary to use. This type of stainless steel has a problem that it is difficult to manufacture die steel (H steel, channel, etc.). Therefore, in the conventional method, in addition to the usual stainless steel top plate that touches the outside and supports its own weight and seismic force, an additional special stainless steel ceiling plate that cuts the edge of the internal gas phase with a mold steel is added. It was established and supported. For this reason, it became a double top plate and became a very expensive aquarium.

Since the price of the dual structure of the top panel that supports its own weight and seismic force and the ceiling panel that is resistant to corrosion is high, it is necessary to provide a structure that makes this a single structure and allows the use of cheap ordinary stainless steel molds. It is aimed.

In the present invention, the top plate is made of special stainless steel, and the reinforcing die steel (beam) is made of ordinary stainless steel, which is lowered to a position where it can be submerged, and the die steel and the top plate are made of short special stainless steel columns. As a truss structure with a connection made of special stainless steel brace, it has strength and is a structure that balances corrosion resistance with strength and price.
By forming a truss beam assembled with the top plate, submerged steel and brace, high strength design can be achieved even if the size of the submerged steel is reduced.

When shaking is applied to an aquarium / oil tank due to an earthquake, the internal liquid resonates with the shaking and sloshing, which is a wavy phenomenon, occurs. In the Tokachi-oki earthquake that occurred in recent years, the waves reached from the side wall to the top surface, generating impact force on the top plate, and a fire was caused by oil leaking from the destroyed top plate, causing a major accident.
In the Tokachi-oki earthquake, 205 of the 395 outdoor oil tanks with a capacity of 500 KL or more were damaged by oil leaks or damage. Among them, 177 tanks had some damage, exceeding 80% of the total. The magnitude of the impact force is imagined.
If the roof is damaged by this impact force, safety and cleanliness cannot be maintained.
This seismic force is handled by a truss-structured top plate-integrated beam to create a high-strength top plate and to enable the use of cheap ordinary stainless steel.
As a result, a high-strength, low-cost water tank can be manufactured.

Embodiments of the patent will be described based on examples with reference to the drawings.
In FIG. 1, a ring-shaped reinforcement 3 is attached to a side plate of a tank, and a submerged beam 4 is attached thereto, and the opposite side is attached to the top of a main column 7. As shown in FIG.
A large number of panels are formed in combination, and each sheet has a four-sided rim with a thickness of about 50 mm. Connect the submerged beam 4 and the top plate 2 with the pillar 5 at several places, and attach the brace 6 between them. By doing so, a large truss beam using the top plate 2 and the submerged beam 4 can be formed, high strength can be obtained, and the weight of the steel material can be reduced.

It is a longitudinal cross-sectional view of a cylindrical water tank. It is sectional drawing of a plane. Top view of a single top panel Cross-sectional view of a single top panel Longitudinal sectional view of the top and ceiling panels of the conventional method

Explanation of symbols

1. Side plate 3. Top plate Ring-shaped side plate reinforcement 4 4. Submerged beam Pillar 6. Breath 7. Main pillar 8. Top panel panel Mimi 9. Rafter reinforcement 10. 10. Ceiling board Ventilation duct 12. Water surface 13. vent

Claims (1)

Reinforcement structure for top plates of aquariums, etc., characterized in that submerged steel mounted between the dome-shaped top plate of the cylindrical water tank and the side plate to the center column is assembled in a truss shape using auxiliary steel

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