Precast beam timing maintenance device

Abstract

The invention relates to a precast beam timing maintenance device, and effectively solves the problem of incapability of automatically closing. The precast beam timing maintenance device comprises a water supply system, a pipe, a nozzle and a timing valve; the timing valve comprises a ball valve, a shell and a box; a rotating shaft is arranged on the shell; an impeller and a driving wheel are mounted on the rotating shaft; a mechanical overload is mounted between the rotating shaft and the driving wheel; a driven wheel is arranged on a valve rod; the driven wheel is rotated in one direction, and is provided with a torsion spring with the valve rod; four poking rods are arranged at the upper end of the valve rod; a sleeve sleeves the valve rod; a gear ring sleeves the sleeve; two stop rodspenetrate through the sleeve; the stop rods can perform a reciprocating motion in the axial direction, and are returned outwards; a rack capable of moving left and right is mounted in the box; the rotating shaft is provided with an incomplete gear engaged with the rack; the rack moves to the left side to rotate the gear ring; then, the two stop rods perform once synchronous opposite inward-outwardreciprocating motion; and the rack moves in one direction through a ratchet and a first pin. The precast beam timing maintenance device is convenient to operate and capable of automatically closing,and saves water.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a timing maintenance device for prefabricated beams. Background technique [0002] The current prefabricated beam maintenance process is divided into four stages: static stop period, heating period, constant temperature period, and cooling period. The temperature in the constant temperature stage is controlled at about 45-50°C, and the constant temperature time is controlled at about 10 hours. The main stage of development, but the existing curing device always has a constant temperature control temperature higher or lower in the control, which is extremely unfavorable to concrete curing. As a result, the strength of concrete develops too fast, and the strength of concrete does not develop or even decreases in the later stage, or the temperature of concrete rises too fast, and temperature cracks appear on the surface to varying degrees inside the concrete, which is extremely un...

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Problems solved by technology

[0004] In view of the above situation, in order to solve the problems existing in the prior art, the purpose of the present invention is to provide a prefabricated beam timing maintenance device, which can effectively solve the problems of inconvenient maintenance of prefabricated beams, cumbersome operation, and failure to automatically close

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