Cold silo flow measuring device and measuring method for asphalt mixing equipment

Abstract

The invention discloses a cold feed bin flow measuring device and a measuring method for asphalt mixture mixing equipment. The device includes a conveyor belt frame, a head frame and a tail frame. The conveyor belt frame is arranged obliquely, and the head frame is hinged to the conveyor belt frame , the tailstock is supported and connected to the conveyor belt frame, and the upper and lower ends of the conveyor belt frame are respectively installed with an upper roller and a lower roller. The upper roller and the lower roller are connected by a conveyor belt and form a belt transmission. The bottom of the rack is connected with a load cell calibration device. The method comprises the steps of: 1. adjusting the conveyor belt frame; 2. setting the load cell to zero; material flow value. The invention has high measurement precision, and the measurement result can play an accurate guiding role for the subsequent asphalt mixture production work, improves the production quality of the asphalt mixture, reduces potential safety hazards, and has low measurement cost.

Description

technical field [0001] The invention belongs to the technical field of cold hopper flow measurement, and in particular relates to a cold hopper flow measurement device and a measurement method for asphalt mixture mixing equipment. Background technique [0002] In the construction of high-grade asphalt pavement in my country, the production of asphalt mixture is generally completed by asphalt mixture mixing equipment. The production gradation control of asphalt mixture starts from the cold material silo. If the cold material in each cold material silo is not loaded according to the ratio required by the laboratory, it may cause overflow and waiting material in each warehouse of the subsequent hot material silo. As a result, the actual production gradation of asphalt mixture is far from the target gradation, which affects the production quality and performance of asphalt mixture, thus indirectly affecting the service life of the construction pavement. In order to ensure that ...

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Problems solved by technology

[0004] Although the above-mentioned method of manually measuring the flow rate of the cold material in the cold material bin is simple, it has the following disadvantages: (1) The sampling volume is small. Generally, a 2m material section is taken on the inclined belt. Due to the large fluctuation of the material flow and uneven thickness, etc., The error of the measurement result is large; (2) It is necessary for the measurement personnel to stand on the inclined belt to bag and weigh the cold material in the sampling material section, which has certain dangers. The specific reason is: because the control room of the mixing station A certain distance, and the location of the inclined belt drive motor is generally the visual dead zone of the operation room, it is difficult for the control room to observe the situation of the measurement site, so the measurement site generally uses a walkie-talkie to maintain communication with the control room, and the control room follows the measurement site. According to the requirement of turning on and off the power supply of the frequency conversion motor driving the discharge belt and the driving motor of the inclined belt, due to the large noise at the measurement site, in case the instruction transmitted from the measurement site to the operation room is not delivered in time or the staff in the control room makes an operation error, in case Mistakenly starting the driving motor driving the inclined belt during manual retrieving will endanger the safety of the measuring personnel; (3) high-intensity manual retrieving in a short period of time greatly increases the labor intensity of the measuring personnel; (4) in the tense measuring process In this process, the weighing of the cold material sampling section needs to be completed quickly, and manual multiple operations are likely to cause negligence, resulting in incorrect weighing results, and eventually lead to incorrect flow measurement results; in addition, manual multiple weighing operations are time-consuming and labor-intensive. strong

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