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我们在研究以音响调节为主回路、矿量调节为副回路组成的球磨机给矿串级调节方案(其原理详见本刊1980年第5期第17～21页)时,为该方案设计了一套给矿机与运输皮带自动切换系统。一、原理概述本切换系统由模拟量比较器(一)、t_s秒可控延时器、给矿机分配器、皮带切换延时器、自动给矿切换封锁器、报警系统六部分组成。其原理方框图如图1。模拟量比较器(一)用于鉴别球磨机原给矿量是否低于使给矿机组切换的最低给矿量。原矿量由矿量检测仪表输出的0～10mA原矿量信号来模拟,给矿机组进行切换的最低给矿量由人工设定的给矿机切换矿量信号来模拟。当原矿量信号小于切换矿量信号时,模拟量比较器(一)将输出原矿欠矿量信号。在模拟量比较器(一)输出原矿欠矿量信号后,由于二方面原因还不能立即进行给矿机切换。一方面是因为原矿量检测存
We are studying the acoustic regulation of the main circuit, the amount of ore is adjusted to the secondary circuit composed of ball mill ore cascade adjustment program (the principle of this issue, No. 5, 1980, No. 17 ~ 21), designed for the program A set of machine and conveyor belt to automatically switch the system. First, the principle of the switching system consists of analog comparator (a), t_s seconds controllable delay to the mine distributor, belt switch delay, automatic switching to the mine blocker, the alarm system consists of six parts. The principle block diagram shown in Figure 1. Analog comparator (A) is used to identify whether the original ball mill feed to the mine unit to switch the minimum amount of ore. The amount of ore is simulated by 0 ~ 10mA ore output signal from the mine detection instrument. The minimum amount of ore to be switched to the mine unit is simulated by manually switching the mine amount signal to the mine machine. When the ore volume signal is less than the switch mine signal, the analog comparator (a) will output the ore ore ore volume signal. After the analog comparator (1) outputs the raw ore less-mine signal, it is not possible to immediately switch the mine machine due to two reasons. On the one hand because of the amount of ore deposit inspection