SU920172A1 - Void former - Google Patents

Description

The invention relates to construction and can be used in the manufacture of construction products with ‘channels from concrete and reinforced concrete mixtures.

Known hollow core ⁵ for the manufacture of reinforced concrete products containing a supporting frame with shields and a central rod in the form of a shaft with spring-mounted telescopic arms pivotally attached to it [1].

However, such a hollow former has insufficient longitudinal stiffness and bearing capacity, which leads to uneven shrinkage of the product.

The closest to the proposed technical essence and the achieved result is a hollow core, including a housing made of elastic material having a toroidal shape in cross section, an elastic filler located inside a closed cavity of the housing, a valve and a device for moving the core, made in the form of a flexible rod located inside an open cavity [2}.

However, such a pore former requires considerable labor to remove it due to the large contact area of the surface of the pore mating with concrete.

The purpose of the invention is the reduction of labor costs for the extraction of the core from the finished product.

This goal is achieved in that the hollow core, comprising a housing made of elastic material, having a toroidal shape in cross section, an elastic filler located inside a closed cavity of the housing, a valve and a device for moving the core, made in the form of a flexible rod located inside an open cavity, is equipped with a pipeline for supplying concrete mixture, placed inside an open cavity of the housing, through which a flexible rod connected with the valve is passed, moreover, The pipe end is rigidly connected to the body.

In FIG. 1 shows the proposed Hollow former, a longitudinal section, in FIG. 2 - position of the hollow core when it is removed.

The void generator includes an elastic shell 1, the inner closed cavity 2 of which is filled with gas from a compressor-vacuum unit (not shown conventionally) through pipes 3 and 4. Inside the shell, Pipeline 5 passes coaxially, at the lower end of which there is a valve 6 freely suspended by a flexible rod 7. Preloading - Naya plate - conductor 8 holds the shell at the time of filling with concrete, preventing its ascent.

The device operates as follows.

Using a crane, the device is lowered into the drilled well.

Pipes 3 and 4 are connected to a source of compressed air and vacuum, and pipe 5 is connected to a concrete pump installation (not shown conditionally).

Then turn on the supply of compressed air and fill the elastic shell 1 in the design position.

When supplying concrete mixture through pipeline 5, the well is filled with concrete to the upper mark, while the valve automatically opens. The remains of concrete alesi from the pipeline 5 is removed by supplying compressed gas or hydraulic pulp.

The concrete mixture can also be fed into the annulus, for example, by a sectional concrete pipe.

The hollow pile channel formed by the sheath is filled with a concrete pump, supplying material, for example a hydraulic pulp, through pipeline 5. In this case, the sheath exfoliates from the channel walls under the influence of the pressure of the hydraulic pulp and creating a vacuum inside the sheath. The channel seal in its upper part is achieved by installing a pneumatic seal 9 on the pipe cap.

Not including the concrete pump, the device is lifted by a crane and removed to the surface.

When the device is removed from the channel, when concrete reaches sufficient strength, instead of, for example, hydraulic pulps from local soils, compressed gas is supplied through pipeline 5 through pipeline 5, which, acting on the shell, separates it from the channel walls.

The elastic shell, separated from the channel walls, makes it easy to remove the device with the help of a light-duty crane.

In the manufacture of hollow piles from slag-alkali concrete on local aggregates, such as sand, loam, the process of removing the device is much faster, and core material, such as sand or loam, is fed by a concrete pump after filling the well with concrete without stopping the concreting process — 20 research institutes.

The economic effect in the manufacture of hollow bored piles is achieved by saving concrete from 35 to 50%.

25.

Claims (2)

(54) EMPLOYER The invention relates to construction and can be used in the manufacture of building products with channels of concrete and reinforced concrete mixes. Known hollow core for making reinforced concrete products, containing a supporting frame with shields and a central shaft-shaped shaft with a hinge attached with spring-loaded telescopic arms Ll. However, this hollow core has an insufficient longitudinal gesture of bone and layer, which leads to uneven shrinkage of the product. Closest to the proposed technical essence and the achieved result is a void forming including a body of an elastic mat & The rial has a toroidal shape in cross section, an elastic filler located inside the closed cavity of the body, a valve and a device for intermixing the void formation, made in the form of a flexible rod located inside the open cavity 2. However, such an emptying body requires considerable labor to extract it due to the large contact area of the surface of the hollow core mated to concrete. The purpose of the invention is to reduce labor costs for removing the void-forming agent from the finished product. The goal is achieved by the fact that a void-forming agent comprising of elastic llaterial, having a toroidal shape in cross section, an elastic filler located inside a closed cavity of the body, a valve and a device for moving the hollow-forming agent, located inside an open cavity, is provided with a pipeline for the supply of concrete mix, placed inside the open cavity of the housing, through which the bending thread is passed, is connected to the valve, with its 392 6 oatajft end f boprovoda rigidly connected to the housing. FIG. 1 shows a longitudinal section of the Pustomer, FIG. 2 - the position of the hollow core when it is removed. The emptying device includes an elastic casing 1, the internal closed cavity 2 of which is filled with gas from a compressor vacuum unit (conventionally not shown) through pipes 3 and 4. Inside the casing there is a coaxially running Pipe 5, at its lower end there is a valve 6 freely suspended by a flexible pipe. Go 7. 7. A plate-jig - a conductor 8 holds the shell at the moment of filling with concrete, preventing its ascent. The device works as follows. With the help of a crane, the device is lowered into the drilled well. Nozzles 3 and 4 are connected to a source of compressed air and vacuum, and pipe 5 to a concrete pump installation (conventionally not shown). Then turn on the compressed air supply and fill the elastic sheath 1; to the design position. When the concrete mixture is supplied through pipeline 5, the well is filled with concrete to the top of the grid, and the valve automatically opens. The remains of the concrete mix from the pipeline 5 contain the compressed gas or hydraulic pulp supply. The concrete mixture can also be fed into the annulus, for example, a sectional concrete casting pipe. The channel of the hollow pile formed by the shell is filled with the help of a concrete pump, feeding materials, such as a hydraulic pellet, through conduit 5. In this case, the shell is peeled off from the channel walls under the action of a hydro-pulp head and a vacuum inside the shell. Flattening of the channel in its upper part is austi- ty by installing pneumatic sealer 9 on the cap of the tube. Without the concrete pump, the device is lifted by a crane and removed to the surface. 4 When a device is removed from the chamber when concrete reaches post-flow strength, instead of, for example, hydro pulp from the soil, pipeline 5 is supplied with compressed gas, which, acting on the shell, separates it from the pipe channel. The elastic shell separated from the channel walls makes it easy to remove the device with a small crane noMomvf. In the manufacture of hollow piles of slag gallon # 1X concrete on local fills, such as sand, loam, the device is pulled out much faster, and the core material, such as sand or loam, is fed by the concrete pump after filling the hole with concrete without stopping the concrete line. The economic effect in the manufacture of hollow bored piles is as low as 35% to 5O%, due to the economy of concrete. The invention is a void-forming device comprising a body of elastic material, having a toroidal shape in cross section (elastic form, resilient filler located inside a closed body cavity, a valve and a device for moving the tubing former, made in the form of a flexible rod located inside an open cavity, distinguishing with that, in order to reduce the labor costs for extraction, it is equipped with a pipeline for supplying concrete mix inside the open cavity of the housing, through which the It is connected to the valve, and the free end of the pipeline is rigidly connected to the casing.Sources of information taken into account in the examination 1. US patent fe 3476351, class B 28 C 7/30, 1969. 2. USSR author's certificate for application number 2716753 / 29-33, cl. E O4 G 1 5 / O6, 1 979. . .: s ... J.,, Lf: J .: If, l; V, G1 htsh:; st; 5th; Phi1.