WSZC威泰克失重秤

失重秤，是一种间断给料连续出料的称重设备，由于失量控制是在料斗中进行，可达到较高的控制精度，结构又易于密封，故在粉料控制时与用螺旋秤来相比是一大提高。适用于水泥、石灰粉、煤粉等微细物料的控制配料。

工作原理

根据称重斗中物料重量的减少速率来控制出料螺旋机或电振机,以达到定量给料

的目的,即失重秤.当称重斗的物料达到称重下限位置时,出料螺旋机则按照当时的转速固定出料量,同时控制料仓里的物料快速下到称重斗内,当装料到称重上限时停止装料,快速装料可以缩短进料时间,提高称重的准确度和控制精度。

产品描述

通过静态秤称量完整的给料系统（料仓、给料机和散状物料）及通过变速电机或电振机控制散关物料的卸料流量。物料（通过螺旋、振动管或槽）从系统卸下，将按每个单位时间(dv/dt)测量的“失重”与所需给料量(预设值)进行比较，实际(测量)的流量与期望的(预设)流量之间的差异会通过给料控制器发生纠正信号，该控制器能自动调节给料速度，从而在没有过程滞后的情况下保持精确的给料量。当料仓中测量的重量达到料仓低料位（重新加料）时，控制器将给料系统按容积给料进行控制，然后料仓快速重新装料（手动或自动），失重控制器重新动作。在批称量失重系统中，设计与连续失重系统相似，然而，给料(批量) 循环最终重量的精度要比实际的给料量控制更高。控制器通过向变速驱动器提供高给料信号以完成快速给料，然后转换到低给料控制信号用于在批量结束时精确控制。

主要技术参数：

技术指标：

系统计量准确度≤0.5%

系统配料准确度≤0.5%

配料计量控制范围0.01-300t/h

适用范围连续式稳定土、混凝土搅拌站水泥配料烧结定量控制给料，煤粉定量控制给料及各种浓浆料的配料等。

失重秤的产品简介：失重秤也叫失重式喂料机，失重给料机，失重配料秤。

失重式喂料机由料斗、喂料器（单、双轴螺旋喂料器）、称重系统和调节器组成，在操作中，料斗、物料和喂料器共同连续地进行称重。随着物料送出后，测量真实的失重速率，并将它与所需要的失重速率（设定值）加以比较。通过调解喂料器速率来自动修正偏离设定点的偏值。从而可以均匀准确地连续喂送物料。

适合范围：颗料、粉末、碳酸钙、滑石粉、树脂膜粉粒品、面粉、淀粉等

粉料秤:解决了流动性很差的喂料计量加料问题；

粒料秤:解决了任何可能发生的架桥问题．

失重秤的特点及应用：

●大输送能力，高精度失重式送料

●通过更换附件可对应粉体/颗粒的供料（选配件）

●螺杆部的分解，组装简单，清扫容易

●有对应规格的耐压防爆、耐磨耗衬板选配件

●可作为前部供料装置使用

●应用于颗料、粉末、碳酸钙、滑石粉、树脂膜粉粒品、面粉、淀粉等

●非标产品可以提供设计

●可提供气压平衡以及除尘选件

专业、精准的称重配料，使用户提高了产品质量，配料控制系统所具备的强大的生产数据统计功能，为用户生产的科学管理提供了强有力的保障。

失重秤的配套软件详细介绍：

（1）特点：

★线性标定即可实现自动也可手动单项标定，并可灵活设置每一项的标定时间。

★可以根据现场要求设置流量显示的有效数位数

★一套系统可以最多管理64个失重秤（用10槽工控机）

★配方数不受限制

★可在线调节目标总流量

★每个秤可存多达10000种物料的系数（如线性标定值）

失重秤的另外可选配件：

★网络版：可使系统调到远程从机状态，受远程的总部的控制人员的直接指挥，从而可以快速廉价地实现较复杂系统的调试

★本系统可作为从机，投入到总控制室的DCS，通讯方式可选为RS232、RS485/422，网卡（TCP/IP），CAN总线等各种现场总线。如要作为从机投入到DCS，需客户事先提供通讯协议。

★双机热备版：当主机出现故障时，从机在100ms内自动实现系统切换掌握控制权。长陆工控失重秤控制管理系统除具有失重秤的基本功能外，其优势还在于以下各点：

★双组PID控制。一组用于粗调，目的是提高控制系统的响应速度，一组用于细调，目的是提高控制系统的精度。目前还没有其它同类仪表使用这种方式。由PID调节的原理，我们很容易知道，每一组PID参数只能适应一种工况。如果只有一组PID参数，肯定要先考虑控制系统精度。于是当目标量变化较大时，这组PID参数肯定会使系统要么较长时间才能稳定，要么波动较长时间。这种情况可能为：当目标量切换而且变化较大时，或者流量因物料突然缺料或多料而使流量变化较大时。例如，稳定土控制系统中，平时的目标总流量为 500T/h，在道路拐弯处总流量应改为250T/h，即目标值的变化为50%，如用双组PID控制，我们可以用粗调PID使系统快速调到目标量的90% 左右，再采用细调的PID使系统达到高精度和稳定。而单组PID调节只能实现其中之一的功能或者一两者的折中。

Weight loss scale, is a kind of weighing equipment for continuous discharge of discontinuous feed material, because the loss control is carried out in the hopper, it can achieve high control precision, and the structure is easy to seal, so it is a great improvement compared with the screw scale powder control. It is suitable for controlling ingredients of fine materials such as cement, lime powder and pulverized coal. Working principle To control the discharge screw machine or electric vibration machine according to the reduction rate of material weight in weighing hopper to achieve quantitative feed. The purpose of the scale is weightlessness. When the material of the weighing bucket reaches the position of the lower limit of weighing, the discharge screw machine fixed the discharge quantity according to the speed of the time, at the same time, the material in the silo was controlled to drop into the weighing bucket quickly, and the loading stopped when the loading reached the upper limit of weighing. Fast loading can shorten the feeding time and improve the accuracy and control accuracy of weighing. Product description A complete feeding system (silo, feeder and loose material) is weighed by static scale and the discharge flow of loose material is controlled by variable speed motor or electric vibration machine. a material (through a screw, vibrating tube or slot) is unloaded from the system. the "weight loss" measured per unit time (dv/dt) is compared with the required feed quantity (preset value). the difference between the actual (measured) flow rate and the desired (preset) flow rate is corrected by the feed controller, which can automatically adjust the feed speed to maintain accurate feed rate without process lag. When the weight measured in the silo reaches the low material level of the silo (re-feeding), the controller controls the feeding system according to the volume feeding, and then the silo quickly reloads (manual or automatic), and the weight loss controller re-operated. In batch weight loss system, the design is similar to continuous weight loss system, however, the accuracy of the final weight of feed (batch) cycle is higher than that of actual feed quantity control. The controller provides a high feed signal to the variable speed drive to complete the fast feed, and then converts to a low feed control signal for accurate control at the end of the batch. Main technical parameters: Technical indicators: System measurement accuracy ≤0.5% System ingredient accuracy ≤0.5% Control range of ingredient measurement 0.01-300t/h Scope of application Continuous stabilized soil, concrete mixing station cement ingredients Sintering quantitative control feed, pulverized coal quantitative control feed and all kinds of concentrated pulp ingredients. Weightless scale product profile: weightless scale is also called weightless feeder, weightless feeder, weightless ingredients scale. The weightless feeder is composed of hopper, feeder (single and double axis spiral feeder), weighing system and regulator. In operation, the hopper, material and feeder are weighed together continuously. After the material is sent out, measure the true weight loss rate and compare it with the desired weight loss rate (set value). the deviation from the set point is automatically corrected by mediating the feeder rate. thus can feed the material evenly and accurately continuously. Suitable range: pellet, powder, calcium carbonate, talc powder, resin film powder, flour, starch, etc. Powder scale: solves the feeding metering feeding problem with poor fluidity; Grain scale: solves any possible bridging problem. Characteristics and Application of Weightless Scales: ● large conveying capacity, high precision weightless feeding ● Feeding of powder/particle by replacing accessories (optional) ● screw part decomposition, simple assembly, easy cleaning ● has the corresponding specifications of pressure and explosion-proof, wear-resistant lining plate selection accessories ● may be used as a front feeding device ● used in pellets, powder, calcium carbonate, talc, resin film powder, flour, starch, etc. ● Non-standard products can be designed ● provides air pressure balance and dust removal options Professional, accurate weighing ingredients, so that users improve the quality of products, batching control system has a strong production data statistics function, for the scientific management of user production to provide a strong guarantee. Detailed introduction of weightless scale software: （) Characteristics: ★ Linear calibration can be achieved automatically or manually, and the calibration time of each item can be set flexibly. ★ can set the effective number of digits of the flow display according to the field requirements ★ A system can manage up to 64 weightless scales (with a 10-trough machine) ★ Formulaes Unlimited ★ Adjustable Total Target Flow Online ★ Coefficients of up to 10,000 materials per scale (e.g. linear calibration values) Additional optional accessories for weightless scales: ★ Web version: It enables the system to be tuned to a remote slave state, under the direct command of the remote headquarters controller, thus enabling the debugging of more complex systems to be realized quickly and cheaply ★ The system can be used as DCS in the master control room. The communication mode can be selected as RS232, RS485/422, network card (TCP/IP), CAN bus and so on. For input to DCS as a slave, prior communication protocol is required. ★ dual-machine hot standby version: when the host failure, the slave in the 100ms automatic system switching control. In addition to the basic function of weightless scale, the control management system of weightless scale in Changlu industrial control has the following advantages: ★ two-group PID control. one set for coarse tuning, the purpose is to improve the response speed of the control system, and one set for fine tuning, the purpose is to improve the accuracy of the control system. There are no other similar instruments using this method. by the principle of PID regulation, we can easily know that each set of PID parameters can only adapt to one working condition. If there is only one set of PID parameters, the control system accuracy must be considered first. As a result, this set of PID parameters will definitely make the system stable or fluctuate for a long time when the target scalar changes greatly. This situation may be as follows: when the target quantity is switched and the change is large, or when the flow rate changes greatly due to the sudden lack of material or more material. for example, in the stabilized soil control system, the total target flow rate is 500 T/h, at the corner of the road should be changed to 250 T/h, that is, the change of the target value is 50%. if controlled by two groups of PID, we can quickly adjust the system to about 90% of the target amount by coarse PID, and then use fine tune PID to make the system achieve high precision and stability. But the single group PID adjustment can only realize one of the functions or one or two of the compromise.