SU1168410A1 - Vibration platform for consolidation of concrete mix - Google Patents

Abstract

Vibroplatform Concrete mixture ramming comprising disposed between fixed on the basis of upper and lower elastic limiters movable frame and in contact with it by a resilient pin firing pin associated with the crank drive oscillation exciter, characterized in that, in order to increase the quality. products by ensuring uniform compaction, it is provided with rigidly mounted on the base of the vertical. guides contacting via rollers with a spring-loaded drummer placed between them, the distances between the upper elastic stops and the movable frame being R and 0.5R, respectively, and the distance between the contacting surfaces of the movable frame and the drummer in the lower position ( is equal to R, where R is the radius of the crank of the exciter.

Description

ABOUT

Im

The invention relates to the production of precast concrete and reinforced concrete and can be used in the building materials industry.

The purpose of the invention is to improve the quality of products by ensuring uniform compaction of the concrete mix.

The drawing shows vibroplatform, a general view.

The bi-platform consists of a movable frame 1 installed between the lower and upper 3 elastic-limiting verticals. The 1 frame is fixed at the base 4. The drummer 5, equipped with the elastic striker 6, moves inside the fixed guides 7 with rollers 8 and elastic elements 9. The hammer is driven by means of a crank mechanism 10, in a rod 11 of which an elastic element 12 is placed. Form 13 with a concrete mix is mounted on the movable frame 1.

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The vibrating platform works as follows.

When turning on the crank mechanism 10 force through the connecting rod. 11 and the elastic element 12 of the front of the striker 5, which reciprocates within the direction of the x 7 and the elastic striker 6, delivers powerful blows from below to the movable frame 1. with the concrete mix 13 mounted on it. Under the action of a crank-bearing mechanism, the movable frame 1, together with the mold 13, moves upwards and hits the upper stops 3 of one side, installed with a smaller clearance, then, moving up, touches the upper stops 3. of the opposite side, i.e. installed with a large gap, after which, under the action of gravitational forces, it descends and hits the lower elastic stops of one and then the other side. At this time, the striker 5, sliding along the rollers 8, descends and compresses the elastic elements 9. After the lower position has passed under the action of the crank mechanism 10 and the elastic forces of the elastic elements 9, the striker 5 begins to move upwards and the cycle repeats.

Za: J.p boyx; mb strike:; ik 5 and the movable frame 1 accept the equal radius of the crank shaft, based on the known curve of the crankshaft; / oi; lp-con rod mechaag; zma, ksggsroo z kl; it turns out that when you rotate the kolvoship from the lower position at an angle of 9 ° C, the speed of alternation of the impactor 5 reaches the maximum value, and consequently, the shock pulse at this moment will be greatest.

The maximum value of the vertical movement of the movable frame 1 with the shape 13 is also equal to the radius of the crank, since from the total movement of the striker 5 equal to two radii, it is necessary to subtract the value of one radius to which the striker 5 is transferred before striking, In order for shock pulses upon impact of the movable frame 1 against the elastic stoppers of both sides of the 5th and the same size, it is necessary that the gap between the movable crayfish 1 and the stoppers 3 on one side be equal to half the radius of the curvature and on the other side equal to the radius. In this case, the magnitude of the side impulses on both sides is the same, because when moving up, after a distance of half the radius has been progressed, the moving frame 1 with one side will hit the upper / elastic stopper 3 and the opposite side of the frame will continue to move up by an amount twice as large, i.e. by the magnitude of the radius, to without impact, it touches elastic stoppers, since the speed of movement of the frame at this moment will be equal to zero. Then, under the action of gravitational forces, the movable frame 1 with form 13 begins to fall down and, having moved by half the radius, hits the lower elastic stops first with the side where the gap is equal to half the radius and then opposite where the gap is equal to the radius.

As a result, one side of the movable frame 1 (in the area with a smaller gap) will hit the limiters twice: first, the upper limiter 3, and then the lower limiter 2. The impact energy will then be equal to Q0.5R when moving upwards; Q0.5R - when moving down 11684, i.e. in the sum of 2Q4) ,, where Q is the mass of frame 1 with the form with concrete mixture 13; R is the radius of the crank. The opposite side of the frame 1 5 will strike once - only about the lower 104 elastic limiters with an impact energy equal to QR. Thus, the impact energy from the one and the other side is the same. As a result, the concrete mix is compacted evenly.

Claims (1)

VIBRATION AREA FOR SEALING A CONCRETE MIX, containing a movable frame located between the upper and lower elastic limiters fixed on the base and contacting it with an elastic hammer, coupled to a crank drive of the vibration exciter, characterized in that, in order to improve the quality of products by ensuring the uniformity of the seal, it is equipped with vertical rigidly fixed on the base. guides in contact with the rollers with a spring-loaded striker placed between them, the distances between the upper elastic stops and the movable frame being equal to R and 0.5R, respectively, and the distance between the contacting surfaces of the moving frame and the striker at the lower position of the latter is equal to R, where R is the radius of the crank pathogen oscillations. J 1 1