摘要:
Annular slab for closing the vessel of a fast nuclear reactor, comprising at least one downwardly divergent frusto-conical sleeve coaxial with the inner and outer sleeves delimiting the slab, dividing the slab envelope into upper and lower parts respectively filled with concrete incorporating metal reinforcements and with concrete for radiation protection.
摘要:
A cryogenic storage tank having inner and outer storage vessels having spaced top, bottom, and upstanding side walls defining an annular insulating space therebetween. Granular insulating material is provided in the annular insulating space between the side walls, and a composite, resilient, insulating blanket, which remains elastically compressible at cryogenic temperatures and which has a flexible, high tensile strength facing on at least one side thereof, is likewise provided in the annular insulating space. The compressibility of the blanket compensates for dimensional changes in the annular insulating space, which would otherwise cause attrition of the granular insulating material, and the high tensile strength flexible facing on the blanket prevents local tearing or rupturing of the blanket when subjected to the vertical drag forces of the behavior of the granular material and due to the thermally induced changes in the dimensions of the annular insulating space.A composite, resilient, insulating blanket provided by a sheet of fiber glass having a flexible layer of high tensile strength fiber glass bonded thereto by a fused film of polyethylene to increase the tensile strength of the blanket.A method of making a composite, compressively resilient, high tensile strength, insulating blanket useable at cryogenic temperatures.
摘要:
Disclosed is a closing arrangement for large passages in a prestressed pressure vessel comprising a cover means for covering the opening of a passage in the prestressed pressure vessel, an annular structural part having an inner boundary surface surrounding the covering means at a distance and defining a space therebetween, a means for securing the annular structural part to the prestressed pressure vessel and a plurality of connecting elements disposed in the space between the annular structural part and the covering means in abutting relationship with the inner boundary surface of the annular structural part and the covering means.
摘要:
A liquid storage tank of the type which has a base, an annular concrete sidewall seated on the base and free to shift laterally thereon as it shrinks and expands, and a multiplicity of horizontal tension hoops embracing the sidewall is provided with a multiplicity of tension rods which are anchored in the base and extend upwardly out of direct contact with any part of the tank sidewall and have an upper end portion above the plane of the top of the sidewall. A fitting operatively engaged with the upper end portion of each tension rod bears effectively perpendicularly upon the top of the sidewall to pull on the tension rod and force the sidewall strongly toward the base. Provision is made for lateral motion of the lower portion of the sidewall relative to the tension rods which is necessary to minimize the effect of stresses resulting from wall curing, wall compression during horizontal post-tensioning, expansion and contraction.
摘要:
A cylindrical pressure vessel is placed under an inward prestress to resist outward forces by the application of outwardly spread annular stressing means which are then permitted to bear inwardly upon the vessel. The device includes fluid-pressure means for relieving the inward force during the application of the annular means so that at least one ring of the latter can expand outwardly and then contracted on the periphery of the vessel.
摘要:
An improved bin is adapted to receive and store materials having fluid properties, such as liquids and granular materials. The bin is made of a fiberglass reinforced plastic material, and has a circular bottom arranged to rest on a foundation, and a cylindrical side wall bonded to a marginal portion of the bottom and extending upwardly therefrom. A cable has its lower end suitably anchored proximate the bottom, has its intermediate length helically wound around the outside of the side wall, and has its upper end suitably anchored proximate the top of the side wall. The improved bin also includes a plurality of vertical members, also formed of a fiberglass reinforced plastic material, spaced circumferentially around the inner surface of the side wall. Each vertical member defines with the side wall a sealed tubular cavity extending upwardly from the bottom. A bearing member, such as concrete, is arranged within each tubular cavity and engages the bottom to receive and support a vertical load transferred from the side wall.
摘要:
A prestressed concrete tank comprising a wall of precast concrete panels, cast continuous beams surrounding the wall of panels, the beams including metal prestressing means, and vertically spaced liquid barriers positioned between the inside of the tank and the prestressing means.
摘要:
A tank constructed of either cast-in-place concrete, or of precast panels of concrete which are separated from each other around the periphery of the tank with the open spaces between the panels being filled with concrete filler units poured in place. One or more collar-like horizontally-lying concrete beams surround the wall of the tank and reinforce it. Each beam is reinforced by one or more tendons encased within the beam.
摘要:
A wall-base joint for a concrete tank is constructed by providing in a base a groove larger than the width of a tank wall, placing the wall in the groove to leave a groove portion on each side of the wall, prestressing the wall with a first compressive force, filling the inner (with respect to the center line of the base) groove portion with concrete and curing it to form a first plug therein, prestressing the wall further with a second compressive force to counteract a fraction of the bending moments produced by the liquid in the tank when it is full, and filling the outer groove portion with concrete and curing it to form a second plug to lock the inner plug into permanent compression.
摘要:
Safety wall for a storage tank containing liquids which are dangerous to the environment, such as liquid natural gas, acrylonitrile, ethylene, hydrocyanic acid compounds etc., which wall, made of concrete, surrounds the storage tank with an interspace and is freely mounted on a supporting floor, while it is tensioned circumferentially by means of tensioning wires which do not bond to the concrete.