Automatic device for measuring setting time of concrete mixture

Abstract

The invention discloses an automatic device for measuring setting time of a concrete mixture. The device comprises a portal type rack fixed on a machine base, wherein an adjustable-speed motor, a worm gear and worm pair driven by the adjustable-speed motor as well as a microcontroller are arranged on a cross beam of the portal type rack; an output control end of the microcontroller is connected with a control input end of the adjustable-speed motor, and a data output end of the microcontroller is connected with a data signal input end of a displayer; a travel scale and a perpendicular lead screw driven by the worm gear and worm pair to move up and down are arranged on the cross beam of the portal type rack perpendicularly downwards, and a probe mounting seat is arranged at the lower end of the perpendicular lead screw; a sample platform and a weighing sensor are arranged under the probe mounting seat and on the machine base from top to bottom, and a signal output end of the weighing sensor is connected with a signal input end of the microcontroller through an analog signal / digital signal converting module. The device has the advantages of automatic and constant-speed pressurization, avoidance of impact force, high intelligent degree, accurate penetration depth, smallness and portability.

Description

technical field [0001] The invention relates to a measuring device for setting time of concrete mixture, in particular to an automatic measuring device for setting time of concrete mixture. Background technique [0002] In the design of concrete mix ratio, accurately testing the setting time of concrete mixture can guide the construction correctly, facilitate the control of concrete mixing and transportation and construction vibration procedures, reduce the unfavorable factors affecting the quality of concrete, reasonably arrange the construction process, and assist in making concrete The process management of transportation avoids the discontinuity of concrete construction due to the problem of setting time. Therefore, the accurate determination of the initial setting and final setting time of concrete plays a very important guiding role in the transportation, pouring, vibration, maintenance and development of the next process of concrete. The water conservancy industry st...

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Problems solved by technology

But in fact, artificial pressure cannot be achieved at a constant speed, and the pressure time cannot be accurately guaranteed, and the operation error is relatively large; moreover, human factors are more affected by manual reading of the maximum resistance value, and the accuracy of the record cannot be guaranteed.

[0004] There are literatures showing that a concrete mixture setting time measuring instrument has appeared in the market, which can realize the automation of the loading process, but this equipment has not yet achieved automatic recording, and manual observation and recording of the dial readings are still required, and the principle of force measurement is complicated, which is an indirect measurement. The force is measured through the deformation of the oil pressure chamber, and the accuracy cannot be guaranteed

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