Concrete pipe machine
AssigneeGHA Lock Joint, Inc.
InventorHarold V. Swanson
Life of this patent
Estimating the term…
Abstract
A machine for fabricating sulfur concrete pipe includes a centrifuge for centrifuging a mixture of the constituents of the sulfur concrete. The centrifuge includes a port for the direction of heat therethrough for heating the mixture. The centrifuge also includes a flexible cylindrical wall which may be directed radially inwards for compacting the mixture in response to a fluid pressure exerted on a side of said flexible cylinder opposite from said mixture. Thermometers are provided for measuring the temperature of applied heat at different points within said centrifuge, and a computer is responsive to the measured temperatures for computing future values of temperature to be applied to said mixture in accordance with a predetermined relationship based on past temperature and time of centrifuging.
Claims8
A pipe fabrication machine comprising in combination:
- centrifuging means for imparting a pipe shape to a mixture of sulfur cement and aggregate,
- heating means coupled to said centrifuging means for heating said mixture, said heating means directing heat through said centrifuging means, said centrifuging means having an open central region and a hollow shaft for guiding said heat therethrough during rotation of a drum of said centrifuging means,
- sensing means for sensing inlet temperature and outlet temperature of said heat while it is propagating through said centrifuging means, and
- computing means coupled to said sensing means for computing the present temperature of said mixture in said centrifuging means based on the difference between said inlet temperature and said outlet temperature, said computing means including a memory, said memory storing a predetermined relationship between the present temperature and a desired temperature of said mixture as a function of time, said memory outputting the desired temperature upon being addressed with the present temperature and time by said computing means, and wherein
- said heating means is connected to said computing means, said heating means being responsive to the desired temperature outputted by said memory for adjusting the flow of said heat to provide said desired temperature to said mixture in accordance with said stored relationship.
A pipe fabrication machine comprising in combination:
- centrifuging means for imparting a a pipe shape to a mixture of sulfur cement and aggregate;
- heating means coupled to said centrifuge means for directing heat therethrough to raise the temperature of said mixture;
- sensing means positioned within said centrifuge means for sensing the temperature of said heat at an inlet and at an outlet to said centrifuge means;
- and
- computing means responsive to the sensing of said temperatures for computing an average value of temperature, said computing means providing control signals based on a stored relationship of said average temperature and time for operating said heating means to alter the temperature of said mixture in accordance with a predetermined temporal relationship.
Dependencies are inferred from the claim text.