SU835761A1 - Method and plant for making complex structures - Google Patents

Description

A known method of making complex building structures consists in forming a core with deaf holes in its body, heat treating the molded core with subsequent fixing of reinforcing mesh on its surfaces and homogenizing it with polymer density of new density.

A device for carrying out this method is known, comprising a pallet mounted through dual-chamber containers on the base, the upper of which communicates with the pallet, beads hinged to the pallet, and vibrators.

The disadvantage of this method is the increased complexity and cycle time of manufacturing, not enough Reliable ensuring the joint work of dissimilar materials in the finished products and low cracking resistance. In particular, the frenetic laboriousness of manufacturing cores With blind tube holes formed by cutting through steel caps, and joining to low-frequency materials on the reinforcing mesh welding, an extended production cycle, and the installation itself has no constructive possibilities of manufacturing pressbeton cores with ready-made blind holes.

The aim of the invention is to reduce the complexity of the technological cycle and metal bones of ready-made products, thus increasing their crack resistance and durability when used in corrosive environments. The goal is achieved by the fact that in the formed core the blind holes in the core body are formed by means of elastic inflatable chambers by means of they contain a heat carrier with a temperature of -95 ° C under pressure, which provides the specified size for the holes, and the fastening of the grids to the core, having a 60-75 ° limit design durability, carried out by looping hollows, placed in blind holes, and the cores are ohmoyolitic produced by the heated polymer-cement mixture to a temperature of 35-50 ° C.

At the same time, the core itself is molded from rigid concrete mixtures with the addition of a plasticizer and a hardening accelerator in a closed volume with prilol enpem loads created by vibration loads and elastic chambers that form deaf holes.

And the installation for carrying out this method, containing a pallet, beads, vibrators and two-chamber containers, is equipped with a vibration load, hollow liner, a system for connecting the liners to the coolant supply sources, means for attaching the vibration load and liners, and power cylinders for pressing the product, the rods of which are in the moldable pallet planes, the hollow liners being fixed on the inner planes of the installation and noting the nozzles with elastic chambers to form deaf holes in the core body ozheny in the molding plane hooked-on, Nick .....

The drawing shows an installation for carrying out a support filled with a fine-grained concrete mass at the start of the start of the homonolishing of the core and the manufacture of a core of press concrete with deafed holes.

The installation comprises a pallet-shaped form 7 with flanges 2 pivotally attached to it, removable hollow liners of box-shaped profile 3 with elastic hollow cores 4, a system for connecting inserts to heat carrier sources 5, fixed fixing devices 6 for longitudinal flanges for securing liners and a core, additional It is 7 with power cylinders 8, pressure load 9 with vibration exciters JO n (Hollow insert II, power hydraulic jacks: 12, coupled with fixed supports 13.

J A method for producing complex structures and structures and the installation is carried out as follows.

In the form of I, 2, the inserts 3, 4 are fixed with the help of end devices of system 1, 5. Then, reinforcement cage 14 is installed and the required amount of rigid cement-concrete mixture 15 is supplied mainly on porous aggregates using reinforced concrete and asbestos cement waste. Using the vibrating unit 9, 10, the core is molded while simultaneously using pressure and heat treatment by feeding elastic hollow cores 4 of the heat transfer fluid into the hollow cores 3, P1 and protruding into the concrete body, providing a predetermined size of blind holes. Depending on the stiffness of the mixtures used, the size of the product, and the mass of the vibration primary, the pressure of the heat-transfer agent can vary from 0.25 to 1.5-2 MPa. To reduce this pressure and reduce the time of heat treatment of the molded core under weights, plasticizing agents and its accelerators are introduced into the initial concrete mix. .

Claims (3)

By . When the concrete reaches 60-75% of the strength, the core with hollow liners is removed from the mold using vypressovyh hydraulic jacks 12. The reinforcing mesh 16 is immediately connected to the core 14, 15 by means of loop-shaped clamping lugs 17, self-locking in the blind holes of teardrop-shaped forms. At the same time, the required amount of fine-grained concrete mix 18 enriched with polymers heated to 35-50 ° C gets into the installation, and the monolithic of the still unheated core is homogenized into this mobile mixture. When the core vibrates, the missing amount of the enriched polymer mixture / 5 is delivered to the curtain from additional containers 7, from where it is squeezed out using power cylinders 8. The core is fixed at this time in the design loyal device by 6, Supports. signs made in advance of the fact that the concrete is monolithic. By homonolishing the cores along the whole contour 4aiCTb of the concrete mass 18 can be additionally fed from above. The finished products are extruded from the installation with the aid of supporting hydraulic jacks 12. Moreover, if by the time the cold structures are pressed down, the strength of the fine-grained concrete sheath, determined by the control sample, is 70-80% of its final strength, further heat treatment of the products is not required. The outer shell of structures can be made of any color with a given surface texture. In this case, the furnace is 100% - | Factory availability of high-quality and effective corrosion-resistant structures. Conducted tests of complex structures allowed to reveal their higher crack resistance and stiffness with reduced metal consumption by 25–40% compared with the construction elements obtained by a known method carried out in installations of known design. The increased effi ciency, rigidity, and higher durability of the joint operation of all materials, revealed by testing prototypes, provide a higher durability of finished products when they are operated in aggressive media. Claim 1. A method of manufacturing complex building structures, consisting in molding a core with blind holes ml in its body, heat treating a molded core, with subsequent fixing of reinforcing mesh on its surface and using monolithic of high density polymeric concrete, due to the fact that , in order to reduce the complexity of the technological cycle and metal consumption, blind holes in the core body are formed by elastic inflatable chambers by supplying a coolant with them Perm 80-95 ° C under pressure, which provides the specified size of the chambers under the holes, and the fastening of the grids to the core, having 60-75% of the design strength limit, is performed by loopback grips installed in blind holes, and the monolithic core is produced by heated polymer cement mixture to a temperature of 35-50 ° C. 2. The method according to l. 1, with the fact that the core is molded from rigid concrete mixtures with the addition of a plasticizer and a hardening accelerator in a closed volume with the application of loads generated by a vibration load and elastic chambers that form blind holes. 3. Installation for the implementation of the method of Lo p. 1 and 2, containing a pallet mounted through two-chamber cylindrical containers on the base, the upper chambers of which communicate with the pallet, the beads hinged to the pallet and vibrators, characterized by the fact that it is equipped with a shield vibroprize, hollow liners, a system for connecting a coolant to the supply sources, means for fixing the vibration load board and a liner and power and cylinders for pressing out the product, the upper surfaces of the rod heads are located in The molded liner plane, the hollow liners being fastened to the upper planes of the installation and having nozzles with elastic chambers for forming blind holes in the core body. The source of information taken into account in the examination: 1. USSR Author's Certificate No. 648414, cl. B 28 B 11.00, 1976. /.