SU1506047A1 - Arrangement for compacting concrete mix in vertically erected structures - Google Patents

Abstract

The invention relates to the field of construction and serves to compact concrete mixes when erected using sliding formwork of monolithic structures. The goal is to increase the productivity and quality of compaction of the concrete mix. The device includes pivotally interconnected upper movable shields 2 and lower fixed shields 4. Movable shields 2 are connected by means of a crank mechanism 6 with an electric drive 5. Fixed shields 4 are connected via spring-loaded pushers and a distribution spool chamber 9 with a source of compressed air 18. The drive of the movable shields 2 is connected to the drive of the lower fixed shields 4 by means of a transmission mechanism 12 with a gear ratio in the range (1: 2) - (1: 3). The phase shift of the oscillating plates of the pushers vertically is ϕ / 2-ϕ / 4. The pushers of the opposite shields oscillate in antiphase. 6 Il.

Description

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The invention relates to the field of construction, in particular to the ycTpoficT-you compaction of concrete mixes in vertically erected with the help of - sliding formwork monolithic structures.

The purpose of the invention is to improve the performance and quality of compaction of the concrete mix.

Figure 1 shows the overall device diagram, section; FIG. 2 is the same side view; FIG. 3 is a general diagram of the device with a perspective view of the drive; Fig. A shows the design of the distributor-15th spool chamber, section; Fig, 5 is a diagram of a spring-loaded pusher, section; Fig. 6 shows a plot of dynamic pressure in a concrete mixture and the creation of a pressure gradient by means of pushers.

A device for compacting concrete mix 1 in vertically erected structures (FIGS. 1-3) consists of

under the action of the crank mechanism 6 and the electric drive 5, at the same time, the concrete mixture receives a preliminary liquefaction and is molded. The final compaction occurs under the action of pneumatic pulses successively fed along the height of the lower fixed shields A. The frequency and sequence of the impulses are determined by the distribution spool chamber 11 9. The working air pressure created by the compressor 18 is transmitted through the flexible air ducts 19 to the distribution spool chamber 9. 5, the moving shields 2 driving the movement and the transmission mechanism 12 of the cylindrical spools 12 associated therewith. 10. When rotating n Latter are performed through the intake air inlet into the chamber I3 and its distribution through the outlet 14 to nozzles 8.

upper movable shields 2, fixed - - the speed of cylindrical U

-15

under the action of the crank mechanism 6 and the electric drive 5, at the same time, the concrete mixture receives a preliminary liquefaction and is molded. The final compaction occurs under the action of pneumatic pulses successively fed along the height of the lower fixed shields A. The frequency and sequence of the impulses are determined by the distribution spool chamber 11 9. The working air pressure created by the compressor 18 is transmitted through the flexible air ducts 19 to the distribution spool chamber 9. 5, the moving shields 2 driving the movement 2 and the transmission mechanism 12 of the cylindrical spools 10 associated with it. 10 The latter are the air inlet through the inlet I3 into the chamber and its distribution through the outlet 14 through the nozzles 8.

using hinges 3 to the lower, fixed shields 4 and connected with the electric drive 5 by means of a crank mechanism 6, the lower fixed shields 4 have openings 7 arranged in rows and connected with rigid ducts 8c with a distributor spool chamber 9 for supplying pulses consisting of cyclic spools 10 in the form of hollow cylinders located on a common shaft 11 having a transmission mechanism 12 to the electric drive 5. The cylindrical spools 10 have an inlet 13 and an outlet 14 (FIG. 4). In the holes of the hard ducts 8 are installed by means of springs 15 pushers 16, isolated from the concrete mix 1 by an elastic coating 17,

The distributor spool chamber 9 is connected to a source of compressed air — a compressor 18 through flexible ducts 19. The lifting mechanism is designed in the form of jacking frames 20.

A device for compacting concrete in vertically erected structures works as follows.

Concrete mix 1 is loaded from above through movable shields 2, oscillating with its displacement from its vertical position to the outside

0

five

0

five

lotter 10 corresponds to the speed ratio of the electric drive 5 boards 2, moving in the range

(1: 2) - (1: 3).

The energy of compressed air leads

A n motion pushers 16 (fig. 5), which, through the elastic coating 17, act on the concrete mix 1, impulse oscillations and create in the liquefied mixture a complex wave-like dynamic pressure field with a variable gradient of the vertical direction (Fig. 6). The return movement of the plungers 16 is provided by the spring 15 and the elasticity of the concrete mix. The created gradient of di amic pressure contributes to the rapid removal of air from the mixture and obtaining a dense concrete structure. Pulses are applied with a phase shift of

. S

with an interval (;

- |)

relatively p

Additional pushers located along the height of the fixed shields 4 and in the opposite phase on the opposite shields of the formwork.

Claims (1)

Exposure of the concrete mixture in two stages (pre-liquefaction and final compaction) improves the performance of the device and the quality of compaction, the claims of the invention Device for compacting concrete vertically erected srigL W 1 fpuz.Z Fig 6 Compiled by N.Lupar Editor L.Gratillo Tehred M. Morgent Proofreader U.Samborsk Order 5397/30 Circulation 644 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 dzie.b Subscription