Multiple thermocouple system for high temperature reactors
First Claim
1. A thermocouple system for rapidly monitoring wall temperatures of a metal vessel, comprising:
- (a) a thermocouple metal conductor wire attached at one end of a first junction point on a metal vessel and attached at the other end to a switching device arranged to connect said conductor wire to a voltage measuring means said first conductor wire being composed of a metal different from that of said vessel; and
(b) a second thermocouple conductor wire spaced from said first thermocouple conductor wire and composed of a metal similar to that of said vessel and attached at one end to a second junction point on said vessel and attached at the other end to a common terminal of said switching device, said voltage measuring means being connected to said switching means sequentially for indicating a small electrical voltage generated in each thermocouple conductor pair consisting of said first conductor wire and said second conductor wire to indicate a voltage difference and corresponding wall temperature at said first junction point and means for processing said small electrical voltage indicated and for comparing said voltage with another voltage generated from a reference thermocouple means attached to a point on said metal vessel where the temperature is stable.
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0 Petitions
Accused Products
Abstract
A multiple thermocouple system for rapidly monitoring wall temperatures of a metal vessel and identifying those thermocouples having voltages and temperature readings above a predetermined level. In the system, a number of first metal insulated conductor wires are metal bonded to the metal vessel to provide hot first junctions, and a second conductor utilizes the vessel metal wall as a portion of the conductor together with an additional metal insulated conductor wire connected to the metal wall. The conductors of each thermocouple pair are connected to the terminals of a rapid switching device and subsequently connected by the switching device to a voltage measuring means, which can be a digital readout type millivoltmeter. If desired, the voltage output of each thermocouple pair can be compared by a computer with the voltage output from a conventional dual conductor reference thermocouple attached to the vessel wall to determine temperature deviations. Also, the voltage readout for those thermocouples showing temperature deviations exceeding a predetermined amount can be conveniently displayed on a cathode ray tube screen.
46 Citations
12 Claims
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1. A thermocouple system for rapidly monitoring wall temperatures of a metal vessel, comprising:
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(a) a thermocouple metal conductor wire attached at one end of a first junction point on a metal vessel and attached at the other end to a switching device arranged to connect said conductor wire to a voltage measuring means said first conductor wire being composed of a metal different from that of said vessel; and (b) a second thermocouple conductor wire spaced from said first thermocouple conductor wire and composed of a metal similar to that of said vessel and attached at one end to a second junction point on said vessel and attached at the other end to a common terminal of said switching device, said voltage measuring means being connected to said switching means sequentially for indicating a small electrical voltage generated in each thermocouple conductor pair consisting of said first conductor wire and said second conductor wire to indicate a voltage difference and corresponding wall temperature at said first junction point and means for processing said small electrical voltage indicated and for comparing said voltage with another voltage generated from a reference thermocouple means attached to a point on said metal vessel where the temperature is stable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A thermocouple system for rapidly monitoring temperatures of a metal vessel, comprising:
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(a) five first thermocouple constantan conductor wires electrically insulated and attached at one end to a first junction point on a steel vessel and attached at their other ends to a common terminal means; (b) a second thermocouple conductor wire composed of substantially the same metal as said vessel and attached at one end to a second junction point on said vessel spaced from said first junction point and attached at the other end to said terminal means; and (c) switching device for connecting any one of said first conductor wires and said second conductor wire from said terminal means to a voltage measuring means;
wherein said voltage measuring means sequentially indicates a small electrical voltage generated in each thermocouple conductor pair consisting of said first conductor wire and said second conductor wire to indicate a voltage difference and corresponding temperature at said first junction point and means for processing said small electrical voltage indicated and for comparing said voltage with another voltage generated from a reference thermocuple means attached to a point on said metal vessel where the temperature is stable.
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Specification