CN201835210U

CN201835210U - Asphalt metering and intelligent anti-overflow system for asphalt mixing plant

Info

Publication number: CN201835210U
Application number: CN 201020557053
Authority: CN
Inventors: 陈飞; 唐玉庆; 王翠军; 吴劲松; 刘政; 杨宝林
Original assignee: Jiangsu Huatong Kinetics Co Ltd
Current assignee: Jiangsu Huatong Kinetics Co Ltd
Priority date: 2010-10-12
Filing date: 2010-10-12
Publication date: 2011-05-18
Anticipated expiration: 2020-10-12

Abstract

The utility model relates to an asphalt metering and intelligent anti-overflow system for an asphalt mixing plant of asphalt mixing equipment, which belongs to road surface engineering equipment. The system comprises an asphalt storage tank and an asphalt metering cylinder, wherein a storage tank output pipeline, a storage tank return pipeline and a metering cylinder feed pipeline which are connected with one another through a three-way valve are arranged between the asphalt storage tank and the asphalt metering cylinder; the storage tank output pipeline is provided with an asphalt circulating pump; and the outlet of the asphalt metering cylinder is connected with a mixing cylinder through an asphalt injection pump. The asphalt injection pump is arranged in a pipeline ranging from the metering cylinder to the mixing cylinder, so that the speed of asphalt entering the mixing cylinder is increased, all asphalt in the metering cylinder is pumped into the mixing cylinder and metering accuracy is ensured; moreover, a metering process is monitored by a programmable controller, possible overflow in the metering cylinder can be judged automatically and the asphalt circulating pump is adjusted in time, so that overflow accidents can be prevented.

Description

Bituminous mixing plant pitch measures intelligent anti-spilled system

Technical field

The utility model belongs to pavement engineering equipment, relates to a kind of bituminous mixing plant pitch that is used for asphalt mixing plant and measures intelligent anti-spilled system.

Background technology

The pitch metering system of existing asphalt mixing plant, its structure such as accompanying drawing 1, it enters hopper by the output pitch of controlling three way cock control pitch supply pump and still refluxes and enter the pitch conservation tank, three way cock work when the metering beginning, supply pump is beaten pitch in hopper, three way cock quits work when the pitch of hopper reaches setting value, pitch is refluxed enter the pitch conservation tank.Metering finishes the back and opens the hopper valve by pitch, pitch is flowed into voluntarily mix cylinder.The speed of putting on the one hand pitch in this system is too slow, perhaps puts untotally, can not guarantee measuring accuracy.On the other hand, can not reset or overflow is arranged when three way cock breaks down, perhaps the pitch hopper is because mechanical breakdown and sensor fault, calculate the weight when not increasing, the adding pitch that will not stop in the pitch hopper, cause pitch to overflow in hopper, both caused great economic loss, the safety to personnel causes great harm again.

Summary of the invention

The utility model wants the technical solution problem to be, a kind of high efficiency, measuring accuracy height is provided, can prevents that hopper from enumerating the bituminous mixing plant pitch of accident and measuring intelligent anti-spilled system.

Bituminous mixing plant pitch of the present utility model measures intelligent anti-spilled system and includes pitch conservation tank and pitch hopper, be provided with conservation tank output channel, conservation tank reflux line and the hopper feed pipe that is connected by three way cock between pitch conservation tank and the pitch hopper, the conservation tank output channel is provided with the pitch circulation pump; The outlet of pitch hopper is connected with a mixing bowl through a pitch water jet pump.

Be connected with the LOAD CELLS that can detect feed weight on the described pitch hopper, the detection signal of LOAD CELLS is input to a programmable logic controller through transmitter, and the switching value output of programmable logic controller is controlled the work of baiting valve, pitch water jet pump and a mixing bowl of pitch circulation pump, pitch hopper respectively.

The utility model since in the pipeline from the hopper to a mixing bowl, add the pitch water jet pump increased pitch enter the speed of mixing cylinder and and the pitch of hopper is squeezed into entirely mixed cylinder as far as possible, guaranteed measuring accuracy; In addition, metering process is monitored, can be judged automatically whether hopper may overflow, and the pitch circulation pump is in time adjusted, thereby can prevent the flash accident by programmable logic controller.

Description of drawings

Fig. 1 is the schematic diagram of the pitch metering feed system of prior art;

Fig. 2 is a systematic schematic diagram of the present utility model.

The specific embodiment

As shown in Figure 2, system of the present utility model includes pitch conservation tank and pitch hopper, be provided with conservation tank output channel, conservation tank reflux line and the pitch hopper feed pipe that is connected by three way cock between pitch conservation tank and the pitch hopper, the conservation tank output channel is provided with the pitch circulation pump; The outlet of pitch hopper is connected with a mixing bowl through a pitch water jet pump.Be connected with the LOAD CELLS that can detect feed weight on the pitch hopper, the detection signal of LOAD CELLS is input to a programmable logic controller through transmitter, and the switching value output of programmable logic controller is controlled the work of baiting valve, pitch water jet pump and a mixing bowl of pitch circulation pump, pitch hopper respectively.

The pitch actual value of the hopper when embodiment of the present utility model measures by pitch compares with the prescription setting value, this value of 20%(that surpasses setting value when actual value can be regulated arbitrarily by upper computer software) time, perhaps can regulate arbitrarily above this value of 20%(of the required metering of the pitch time of current formulation when the metering time) time, stop the pitch supply pump, overflow to prevent pitch.

Claims

1. a bituminous mixing plant pitch measures intelligent anti-spilled system, include pitch conservation tank and pitch hopper, be provided with conservation tank output channel, conservation tank reflux line and the hopper feed pipe that is connected by three way cock between pitch conservation tank and the pitch hopper, the conservation tank output channel is provided with the pitch circulation pump, it is characterized in that: the outlet of pitch hopper is connected with a mixing bowl through a pitch water jet pump.

2. bituminous mixing plant pitch according to claim 1 measures intelligent anti-spilled system, it is characterized in that: be connected with the LOAD CELLS that can detect feed weight on the pitch hopper, the detection signal of LOAD CELLS is input to a programmable logic controller through transmitter, and the switching value output of programmable logic controller is controlled the work of baiting valve, pitch water jet pump and a mixing bowl of pitch circulation pump, pitch hopper respectively.