Control method for preventing concrete segregation during large-height-difference downward concrete conveying

A control method and concrete technology, which can be used in earth drilling, underground chambers, non-rotational vibration suppression, etc., can solve the problems of low transportation efficiency and easy pipe blockage, and achieve controllable discharge speed, air removal, and convenient The effect of leveling and heightening

Inactive Publication Date: 2021-03-02
中铁十七局集团第五工程有限公司
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Problems solved by technology

[0004] The present invention provides a control method for conveying concrete downwards with a large height difference to prevent concrete segregation in order to

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  • Control method for preventing concrete segregation during large-height-difference downward concrete conveying

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Embodiment Construction

[0028] A control method for preventing concrete segregation by conveying concrete downwards with a large height difference, the method is realized by the following steps:

[0029] S1: Assembly of the control device: first install the vertical duct 1, the upper side wall of the vertical duct 1 is provided with an exhaust valve 2, and the lower part is provided with a support platform 3; The left support plate 4 and the right support plate 5, and between the left support plate 4 and the right support plate 5, a horizontal conduit 6 is horizontally installed, and the lower left side wall of the horizontal conduit 6 is fixed with a The discharge hopper 7 and the upper right side wall are provided with a feed port connected to the vertical conduit 1; both ends of the horizontal conduit 6 are fixed with a cover plate 8, and the inner cavity is provided with a rotating shaft passing through the two cover plates 8 9. The side wall of the rotating shaft 9 is fixed with a helical blade ...

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Abstract

The invention particularly relates to a control method for preventing concrete segregation during large-height-difference downward concrete conveying. The problems that according to an existing large-height-difference downward concrete conveying operation mode, pipe blocking is prone to occurring, and the conveying efficiency is low are solved. The control method for preventing concrete segregation during large-height-difference downward concrete conveying comprises the steps that S1, a control device is assembled, specifically, a vertical guide pipe is mounted firstly, then a left supportingplate and a right supporting plate are fixed to a supporting platform, a horizontal guide pipe is mounted between the left supporting plate and the right supporting plate, then a motor is mounted, anoutput shaft of the motor is connected with a rotary shaft, and finally a low-position receiving hopper is placed under a discharging hopper; S2, pipe wetting is conducted; S3, concrete is discharged;S4, concrete discharging is interrupted; and S5, concrete discharging is recovered. According to the control method, the concrete in the vertical guide pipe can be kept in a full state all the time,the concrete discharging speed of the vertical guide pipe is controllable, and thus segregation and pipe blocking which are prone to occurring during large-height-difference downward concrete conveying are effectively prevented.

Description

technical field [0001] The invention relates to a control method for conveying concrete, in particular to a control method for conveying concrete downward with a large height difference to prevent concrete segregation. Background technique [0002] In large underground projects such as tunnel shafts, subway stations, deep foundation pits and other underground projects, it is often necessary to transport concrete from the ground to tens of meters or even hundreds of meters underground. Generally, chutes are used when the height difference is small, and chutes are used when the height difference is large. catheter. [0003] However, practice has shown that the existing method of transporting concrete downwards with a large height difference has the following problems in its application: First, when transporting with a conduit, the concrete will fall freely under the action of gravity, which will easily lead to segregation of the concrete and destroy the concrete Workability (...

Claims

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Application Information

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IPC IPC(8): E02D15/02E21D11/10F16F15/02
CPCE02D15/02E21D11/10F16F15/02
Inventor 魏强杨思琪孙义佳邹华屈振荣董琪
Owner 中铁十七局集团第五工程有限公司
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