公开(公告)号：US3736360A

公开(公告)日：1973-05-29

申请号：US3736360D

申请日：1971-10-27

Applicant: ASEA AB

Inventor： BERGMAN C ,  LARSSON P

IPC: B22F3/10 ,  C04B35/56 ,  F27B11/00 ,  G05D16/20 ,  F27D7/06

CPC classification number: B22F3/1007 ,  B22F3/10 ,  B22F2201/20 ,  B22F2203/03 ,  C04B35/56 ,  G05D16/202

Abstract: A control system for an electrically heated furnace for sintering powder bodies, especially bodies of hard metal, has a vacuum pump connected to the interior of the furnace chamber by a suction conduit. The furnace includes a plurality of heating elements for different zones, a temperature sensitive instrument for each zone and a controlled measuring instrument for one of the zones which is the master zone. These instruments are connected to a master regulator for the furnace and slave regulators for the individual zones. A throttle valve in the vacuum conduit, or a controlled tap connected to the vacuum conduit, make it possible to keep the pressure in the furnace constant despite the fact that the pump runs at a constant speed. A pressure-sensing member connected to the vacuum conduit is also connected to the regulators for the heating elements.

Abstract translation: 用于烧结粉末体，特别是硬质金属体的电加热炉的控制系统具有通过抽吸管连接到炉室内部的真空泵。 炉子包括用于不同区域的多个加热元件，用于每个区域的温度敏感仪器和用于作为主区域的区域之一的受控测量仪器。 这些仪器连接到用于各个区域的炉和从调节器的主调节器。 真空管道中的节流阀或连接到真空管道的受控分接器使得可以将炉中的压力保持恒定，尽管泵以恒定的速度运行。 连接到真空管道的压力感测构件也连接到用于加热元件的调节器。