发明名称 |
Control method and equipment for charging ready-mixed concrete additives batchwise |
摘要 |
A control method for charging ready-mixed concrete additives batchwise which aims at keeping the slump of ready-mixed concrete within a certain range and making longer transportation by truck mixer possible without degrading the quality, where the slump of ready-mixed concrete is detected electrically as a change in the mixing torque so that, when this detected value reaches a value set beforehand, a motor receives a control instruction to charge additives for adjusting slump into the ready-mixed concrete and so that the operating time of the motor for charging additives and the interval until control operation is reset may be adjusted with a timer.
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申请公布号 |
US4008093(A) |
申请公布日期 |
1977.02.15 |
申请号 |
US19740486348 |
申请日期 |
1974.07.08 |
申请人 |
JAPANESE NATIONAL RAILWAYS |
发明人 |
KITSUDA, TOSHIYUKI;HATTORI, KENICHI;NAKAGAWA, HIROMI;WAKAO, MITSURU;MATSUDA, TSUNEHISA |
分类号 |
B28C7/04;B28C7/02;G05D11/13;(IPC1-7):C04B7/02 |
主分类号 |
B28C7/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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