WO2016011891A1 - 一种采制样输料速度的控制方法 - Google Patents

一种采制样输料速度的控制方法 Download PDF

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WO2016011891A1
WO2016011891A1 PCT/CN2015/083515 CN2015083515W WO2016011891A1 WO 2016011891 A1 WO2016011891 A1 WO 2016011891A1 CN 2015083515 W CN2015083515 W CN 2015083515W WO 2016011891 A1 WO2016011891 A1 WO 2016011891A1
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speed
coal
feeding
conveying
amount
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PCT/CN2015/083515
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French (fr)
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朱先德
郭有信
钟龙
何习达
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湖南三德科技股份有限公司
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G43/00Control devices, e.g. for safety, warning or fault-correcting

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  • the invention mainly relates to the technical field of sampling and sampling, and particularly relates to a control method suitable for the conveying speed of a conveying device in a sampling process.
  • a belt picking prototype is generally used to sample the moving stream conveyed on the belt.
  • the usual arrangement is to install a sampler on the conveyor frame in the belt trestle, and the materials taken are transported through the flow tube to the sample preparation system in the sample preparation room under the trestle for crushing and shrinking.
  • the whole set of equipment mainly consists of sampler (middle, head), feeding belt conveyor, crushing system, shrinking system, sample collector, waste disposal system, computer control system and so on.
  • the above-mentioned mechanism has the following problems in the use process: due to the characteristics of the coal material itself, the flow conveyed on the belt is in an uneven state, which has a great influence on the subsequent crushing and shrinking operation, and is prone to occur.
  • the crushing shrinkage is in an unsafe working state in a short time, causing damage to the crushing and shrinking equipment. Or, it affects the belt conveying mechanism.
  • the technical problem to be solved by the present invention is that, in view of the technical problems existing in the prior art, the present invention provides a control method for a sample conveying speed with simple principle, convenient control and good reliability.
  • the present invention adopts the following technical solutions:
  • a control method for collecting sample conveying speed, taking coal sample characteristics, single sampling coal quantity of sampling equipment, speed of conveying equipment and processing capacity of crushing equipment as parameter input quantities of control model, and using control model to obtain conveying materials The real-time target feed rate of the device and the speed control command are sent to the conveying device to complete the speed adjustment of the conveying device.
  • the coal-like properties include coal-like moisture and/or coal-like particle size.
  • control model first obtains a real-time current value of the crushing device adapted to the specific coal sample moisture and particle size, and feeds the value signal to the speed controller of the conveying device to obtain the conveying device. Corresponding real-time feeding speed; Finally, the conveying speed is adjusted by the control model, so that the actual feeding amount is always adapted to the processing capacity of the crushing equipment, so that the crushing equipment is always in a safe working state.
  • f2 sampling amount, grain size, moisture
  • Q is the crusher processing capacity
  • q is the belt feeder feeding amount
  • I is the crusher real-time current
  • I 0 is the crusher rated load current
  • V is the belt conveyor feeding speed
  • V 0 is the belt conveyor normal speed
  • S For the cross-sectional area of the coal flow of the belt conveyor
  • K is the current feedback coefficient
  • is the density of coal
  • a is the single sampling amount
  • b is the coal sample particle size
  • c% is the coal sample moisture.
  • the invention has the advantages that the above various parameter input quantities are input into the control model, and the real-time current value of the crusher adapted to the specific coal sample moisture and particle size is obtained, and the pass value is obtained.
  • the signal is fed back to the belt conveyor speed controller to obtain the real-time feeding speed of the belt conveyor.
  • the belt conveyor speed is adjusted by the controller, so that the actual feeding amount is always adapted to the crusher processing capacity, so that the crusher Always in a safe working condition, to avoid the purpose of blocking or burning the crusher. That is to say, the controller adjusts the feeding speed of the belt conveyor in real time, that is, adjusts the feeding amount to ensure that a certain amount of coal in the moisture and particle size conditions enters the crusher without blocking the crusher.
  • FIG. 1 is a schematic illustration of the principles of the present invention.
  • a control method for the sample conveying speed of the present invention is as follows: a coal sample characteristic, a single sampling coal quantity of a sampling device, a speed of a conveying device, and a processing capacity of a crushing device are used as a control model.
  • the parameter input quantity is obtained by using the control model to obtain the real-time target feeding speed of the conveying equipment and sending the speed control command to the conveying equipment to complete the speed adjustment of the conveying equipment.
  • the coal sample characteristics include coal sample moisture and coal sample size.
  • the conveying equipment can adopt belt conveyor or other types of conveying mechanism according to actual needs.
  • the crushing equipment can adopt crusher or other types of crushing equipment according to actual needs.
  • the present invention inputs the above various parameter input quantities into the control model, and obtains the real-time current value of the crusher adapted to the specific coal sample moisture and particle size, and feeds the value signal to the belt conveyor speed controller.
  • the present invention actually realizes that the specification of the feed amount is reduced, and the specification for the use of the crusher is reduced.
  • the crusher is required to process the coal sample without blocking, and the processing capacity of 5t is required. After control, only 2t of processing power is required. That is, by adjusting the feeding amount of the feeding belt conveyor, the effect of energy saving and cost reduction is achieved.
  • the working state of the crushing equipment (such as: crusher) should be single sampling coal volume, coal sample moisture, coal sample size, belt conveyor speed, and sampling device.
  • the crusher processing amount and other factors are related, and these factors will be reflected by the real-time current of the crusher.
  • the real-time current of the crusher can also be described as related to the feeding amount of the belt conveyor per unit time, and the feeding amount depends on the feeding speed and the coal volume per unit cross-sectional area.
  • the real-time current I of the crusher can directly reflect the working state of the crusher, and the current is high, indicating that the crusher is close to full load or overload operation, and the feed speed should be slowed down. Conversely, the feed rate can be restored to normal and fast.
  • the single sampling coal quantity of the sampling device in each parameter, the speed of the conveying equipment, and the processing amount of the crushing equipment are all known parameters, and the coal sample characteristics (coal sample moisture, coal sample particle size) are Real-time monitoring acquisition can be performed by moisture detecting equipment and particle size detecting equipment.
  • control model is a speed controller that converts the final control signal into a current value of the crushing device and feeds the current signal to the conveying device.
  • the model is derived.
  • Q is the crusher processing capacity
  • q is the belt feeder feeding amount
  • I is the crusher real-time current
  • I 0 is the crusher rated load current
  • V is the belt conveyor feeding speed
  • V 0 is the belt conveyor normal speed
  • S For the cross-sectional area of the coal flow of the belt conveyor
  • K is the current feedback coefficient
  • is the density of coal
  • a is the single sampling amount
  • b is the coal sample particle size
  • c% is the coal sample moisture.
  • the purpose of the adjustment is to make the belt feeding amount q smaller than the crusher processing amount Q, according to the formula:

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  • Disintegrating Or Milling (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Crushing And Grinding (AREA)

Abstract

一种采制样输料速度的控制方法,将煤样特性、采样设备的单次采样煤量、输料设备的速度及破碎设备的处理量作为控制模型的参数输入量,利用控制模型得到输料设备的实时目标喂料速度并将速度控制指令发送至输料设备,完成对输料设备的速度调节。该控制方法具有原理简单、控制方便、可靠性好等优点。

Description

一种采制样输料速度的控制方法 【技术领域】
本发明主要涉及到采制样技术领域,特指一种适用于采制样过程中输料设备输料速度的控制方法。
【背景技术】
在冶金、电力等领域中,对于所使用的煤料往往需要进行采制样作业,以便对煤料的特性进行分析。目前,一般是采用皮带采制样机,对皮带上输送的移动料流进行采样。通常的布置方式是在皮带栈桥内的输送机机架上安装采样器,采取的物料通过流管输送到栈桥底下制样间内的制样系统进行破碎缩分。整套设备主要由采样器(中部、头部)、给料皮带机、破碎系统、缩分系统、样品收集器、弃料处理系统、计算机控制系统等组成。
但是,上述机构在使用过程中存在以下问题:由于煤料的本身的特性,会造成皮带上输送的料流处于不均匀状态,为之后的破碎缩分作业也带来了巨大的影响,容易出现破碎缩分在短时间内处于非安全的工作状态,造成破碎缩分设备的损毁。或者,对皮带输送机构造成影响。
【发明内容】
本发明要解决的技术问题就在于:针对现有技术存在的技术问题,本发明提供一种原理简单、控制方便、可靠性好的采制样输料速度的控制方法。
为解决上述技术问题,本发明采用以下技术方案:
一种采制样输料速度的控制方法,将煤样特性、采样设备的单次采样煤量、输料设备的速度及破碎设备的处理量作为控制模型的参数输入量,利用控制模型得到输料设备的实时目标喂料速度并将速度控制指令发送至输料设备,完成对输料设备的速度调节。
作为本发明的进一步改进:所述煤样特性包括煤样水分和/或煤样粒度。
作为本发明的进一步改进:所述控制模型先得出适应于特定煤样水分、粒度下破碎设备的实时电流值,并通过值信号反馈到输料设备的速度控制器中,得出输料设备对应的实时喂料速度;最后,通过控制模型对输料速度进行调节,从而使实际喂料量总是适应于破碎设备的处理量,让破碎设备始终处于安全的工作状态下。
作为本发明的进一步改进:在所述控制模型的处理过程中,输料设备的喂料量q与破碎设备的处理量Q的关系应为q≤Q,输料设备上煤流截面积S由煤样的水分和粒度决定, 输料设备的喂料量q=3.6*S*V*ρ,引入破碎设备的实时电流反馈系数K=f1(实时电流)=f1(I):q=K*3.6*S*V*ρ;
根据q≤Q,得出:
K*3.6*S*V*ρ≤Q,得出:
V≤Q/(K*3.6*S*ρ),
其中S主要受单次煤采样量、煤样水分和粒度的影响,反映为S=f2(采样量,粒度,水分)=f2(a,b,c%),通过输入各项参数后由控制模型得出;
则V≤Q/[f1(I)*3.6*f2(a,b,c%)*ρ]约定:当I≥2*I0时,V=0,即皮带机停止喂料;当I≤I0时,V=V0,即皮带机为正常速度;
其中,Q为破碎机处理量,q为皮带机喂料量,I为破碎机实时电流,I0为破碎机额定负载电流,V为皮带机喂料速度,V0为皮带机正常速度,S为皮带机煤流截面积,K为电流反馈系数,ρ为煤的密度,a为单次采样量,b为煤样粒度,c%为煤样水分。
与现有技术相比,本发明的优点在于:本发明是将以上多种参数输入量输入到控制模型中,得出适应于特定煤样水分、粒度下破碎机的实时电流值,并通过值信号反馈到皮带机速度控制器中,得出皮带机对应的实时喂料速度;最后通过控制器对皮带机速度进行调节,从而使实际喂料量总是适应于破碎机处理量,让破碎机始终处于安全的工作状态下,达到避免破碎机堵转或烧毁的目的。也就是说,控制器实时调整皮带机喂料速度,即调整喂料量,确保在该水分、粒度情况下的一定煤量进入破碎机不将破碎机堵转。
【附图说明】
图1是本发明的原理示意图。
【具体实施方式】
以下将结合说明书附图和具体实施例对本发明做进一步详细说明。
如图1所示,本发明的一种采制样输料速度的控制方法,为:将煤样特性、采样设备的单次采样煤量、输料设备的速度及破碎设备的处理量作为控制模型的参数输入量,利用控制模型得到输料设备的实时目标喂料速度并将速度控制指令发送至输料设备,完成对输料设备的速度调节。上述煤样特性包括煤样水分和煤样粒度,输料设备可以根据实际需要采用皮带输送机或其他类型的输料机构,破碎设备可以根据实际需要采用破碎机或其他类型的破碎设备。即,本发明是将以上多种参数输入量输入到控制模型中,得出适应于特定煤样水分、粒度下破碎机的实时电流值,并通过值信号反馈到皮带机速度控制器中,得出皮带机对应的实时喂料速度;最后通过控制器对皮带机速度进行调节,从而使实际喂料量总是适应于破碎机处理量,让破碎机始终处于安全的工作状态下,达到避免破碎机堵转或 烧毁的目的。也就是说,控制器实时调整皮带机喂料速度,即调整喂料量,确保在该水分、粒度情况下的一定煤量进入破碎机不将破碎机堵转。
进一步,本发明实际上还同时还实现了通过调节喂料量,降低了对破碎机使用需求的规格,比如说按照以往情况破碎机处理该批煤样不堵需要5t的处理能力,通过本发明控制后,只需要2t的处理能力。即通过调整给料皮带机的喂料量,达到了节能降低成本的效果。
通过本发明的上述方法可知,实际上在机械化采制样过程中,破碎设备(如:破碎机)的工作状态应与采样设备单次采样煤量、煤样水分、煤样粒度、皮带机速度、破碎机处理量等因素有关,而这些因素综合作用后将会通过破碎机的实时电流反映出来。而破碎机实时电流也可以描述为跟单位时间内皮带机的喂料量相关,喂料量又取决于喂料速度和单位截面积煤量。破碎机实时电流I能直接反映出破碎机的工作状态,电流高,说明破碎机接近于满负荷或者超负荷运行,则喂料速度应减慢。反之,喂料速度可以恢复正常快速。
在本发明的上述方法中,各参数中采样设备的单次采样煤量、输料设备的速度、破碎设备的处理量均为已知参数,煤样特性(煤样水分、煤样粒度)则可以通过水分检测设备和粒度检测设备进行实时监测获取。
在本发明的上述方法中,控制模型是将最终的控制信号转换成破碎设备的电流值,反馈电流信号到输料设备的速度控制器。
在具体应用实例中,皮带机喂料量q与破碎机处理量Q的关系应为q≤Q,皮带机煤流截面积S主要由煤样的水分和粒度决定,皮带机喂料量q=3.6*S*V*ρ,引入破碎机实时电流反馈系数K=f1(实时电流)=f1(I):q=K*3.6*S*V*ρ;
根据q≤Q,得出:
K*3.6*S*V*ρ≤Q,得出:
V≤Q/(K*3.6*S*ρ),
其中S主要受单次煤采样量、煤样水分和粒度的影响,反映为S=f2(采样量,粒度,水分)=f2(a,b,c%),通过输入各项参数后由控制模型得出。
则V≤Q/[f1(I)*3.6*f2(a,b,c%)*ρ]约定:当I≥2*I0时,V=0,即皮带机停止喂料;当I≤I0时,V=V0,即皮带机为正常速度。
其中,Q为破碎机处理量,q为皮带机喂料量,I为破碎机实时电流,I0为破碎机额定负载电流,V为皮带机喂料速度,V0为皮带机正常速度,S为皮带机煤流截面积,K为电流反馈系数,ρ为煤的密度,a为单次采样量,b为煤样粒度,c%为煤样水分。
具体应用实例:某采样机单次煤采样量a=20kg,煤样粒度b≤50mm,煤样水分c%=12%,皮带机速度V0=0.1m/s,破碎机处理量Q=2.5t/h,破碎机额定负载电流I0=15A,煤密度 ρ=1000kg/m3,某一时段时,测得破碎机实时电流20A;将以上参数输入控制模型得出:
电流反馈系数K=f1(实时电流)=f1(I)=1.3;
皮带机煤流截面积S=f2(采样量,粒度,水分)=f2(a,b,c%)=0.02㎡;
调节目的是让皮带机喂料量q小于破碎机处理量Q,根据公式:
皮带机喂料量q=K*3.6*S*V*ρ≤Q,得出:
V≤Q/(K*3.6*S*ρ),
代入数值算出V≤0.027m/s,即此时给料皮带机喂料速度V应为0.027m/s,速度值传输到皮带机速度控制器,将皮带机速度调为0.027m/s,即可以使破碎机处于正常运转状态。
以上仅是本发明的优选实施方式,本发明的保护范围并不仅局限于上述实施例,凡属于本发明思路下的技术方案均属于本发明的保护范围。应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理前提下的若干改进和润饰,应视为本发明的保护范围。

Claims (4)

  1. 一种采制样输料速度的控制方法,其特征在于,将煤样特性、采样设备的单次采样煤量、输料设备的速度及破碎设备的处理量作为控制模型的参数输入量,利用控制模型得到输料设备的实时目标喂料速度并将速度控制指令发送至输料设备,完成对输料设备的速度调节。
  2. 根据权利要求1所述的采制样输料速度的控制方法,其特征在于,所述煤样特性包括煤样水分和/或煤样粒度。
  3. 根据权利要求1或2所述的采制样输料速度的控制方法,其特征在于,所述控制模型先得出适应于特定煤样水分、粒度下破碎设备的实时电流值,并将电流值信号反馈到输料设备的速度控制器中,得出输料设备对应的实时喂料速度;最后,通过控制模型对输料速度进行调节,使实际喂料量适应于破碎设备的处理量,让破碎设备始终处于安全的工作状态下。
  4. 根据权利要求3所述的采制样输料速度的控制方法,其特征在于,在所述控制模型的处理过程中,输料设备的喂料量q与破碎设备的处理量Q的关系为q≤Q;输料设备上煤流截面积S由煤样的水分和粒度决定,输料设备的喂料量q=3.6*S*V*ρ,引入破碎设备的实时电流反馈系数K=f1(实时电流)=f1(I):q=K*3.6*S*V*ρ;
    根据q≤Q,得出:
    K*3.6*S*V*ρ≤Q,得出:
    V≤Q/(K*3.6*S*ρ),
    其中S主要受单次煤采样量、煤样水分和粒度的影响,反映为S=f2(采样量,粒度,水分)=f2(a,b,c%),通过输入各项参数后由控制模型得出;
    则V≤Q/[f1(I)*3.6*f2(a,b,c%)*ρ]
    约定:当I≥2*I0时,V=0,即皮带机停止喂料;当I≤I0时,V=V0,即皮带机为正常速度;
    在上述计算过程中,Q为破碎机处理量,q为皮带机喂料量,I为破碎机实时电流,I0为破碎机额定负载电流,V为皮带机喂料速度,V0为皮带机正常速度,S为皮带机煤流截面积,K为电流反馈系数,ρ为煤的密度,a为单次采样量,b为煤样粒度,c%为煤样水分。
PCT/CN2015/083515 2014-07-24 2015-07-08 一种采制样输料速度的控制方法 WO2016011891A1 (zh)

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CN201410354786.7 2014-07-24
CN201410354786.7A CN104163330B (zh) 2014-07-24 2014-07-24 一种采制样输料速度的控制方法

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