SU691306A1 - Method for the manufacture of pressure pipes - Google Patents

Description

one

The invention is related to the production of precast concrete and reinforced concrete products.

There is a known method for producing reinforced concrete pressure pipes by molding a core from a concrete mixture, winding spiral armature on it and applying a protective layer from concrete mixture 1 on it.

The disadvantages of the method are

in large waste concrete mix when

applying a protective layer of POWER EDM in a manner or by labor

capacity of the process of applying this layer

The purpose of the invention is to reduce labor intensity and reduce waste.

This goal is achieved by the fact that in a known method of producing pipe-like pipes by forming ser-; the gutter from concrete mixes, winding on the last spiral reinforcement and applying on it a protective layer of concrete mix. The application of the protective layer is carried out by crimping the outer shell, preformed by centrifuging from the concrete mix, and during the crimping, the outer shell is vibrated. Figure 1 shows the shape with the outer shell formed inside it, a transverse section; in FIG. 2, the process of bringing the outer shell and the surface of the seric into contact in FIG. Zform and the pipe with the outer shell at the moment of crimping, the cross section in FIG. 4, the process of disassembling the pipe.

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Form 1 dp of centrifuging the outer shell 2 consists of longitudinal parts connected to each other by hinges 3 and lock 4, the form also includes an elastic cover 5, 5 cores 6, connecting pipes 7, a slot 8 and a pipe core 9.

The production of pipes according to the proposed method is carried out as follows.

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Claims (2)

A core 9 is made and spiral reinforcement wound on it. Then the form 1 is placed on a centrifuge and the outer shell 2 is formed, after which the form is placed on the stand, lock 4 is released, the longitudinal parts of the form rotating on the hinges 3 open, and in the resulting bed of the wall -. The core 9 is extended. After that, the longitudinal parts of the mold are closed and they are secured with a lock 4. A liquid or another medium is supplied under pressure through the nozzle 6, which is evenly distributed between the elastic sheath 5 and the mold 1 due to the flexible patches 7, it presses the outer casing 2 and presses it against the surface of the core 9. After heat treatment (in a certain state), through outlet nozzle B, liquid or another medium is discharged and discharged. pipes, opening longitudinal parts (forms 1 by means of a lock 4. The pipe is removed and sent to the posts, tests. The form is cleaned of residual concrete and lubricated, collected and fed again to a centrifuge. To improve the quality of concrete of the protective layer (outer shell) during the crimping the form is subjected to vibration using mounted vibrators or on a specially equipped vibrating table.The use of the proposed method for the production of reinforced concrete pressure pipes allows, besides improving the quality of pipes and increasing the service life, almost elimination of waste material, using / shh to create a protective layer. Claim 1, A method for producing pressure pipes by molding a core of concrete mixtures, winding spiral reinforcement onto the last spiral reinforcement and applying a protective layer of concrete mixture to it In order to reduce labor intensity and reduce waste, the application of the protective layer is carried out by crimping the outer casing preformed by centrifuging from the concrete mix. 2. Method according to Claim 1, characterized in that during the crimping the outer shell is subjected to vibration. Sources of information taken into account in the examination 1. Popov A.N. Concrete and reinforced concrete pipes, M., stroiizdat, 1973, p. 148-149.