DETERIORATION DETECTOR AND THERMOCOUPLE INSPECTION DEVICE
First Claim
1. A deterioration detection device provided with a protection tube thermocouple for detecting deterioration of the protection tube thermocouple by applying current to the protection tube thermocouple, whereinthe protection tube thermocouple includes a thermocouple, and a protection tube which accommodates the thermocouple,the protection tube includes:
- a conical portion formed on a front end side of the protection tube; and
a hollow portion which extends in a length direction of the protection tube for connecting between a front end and a rear end of the protection tube in the inside of the protection tube, and into which the thermocouple is received, andthe hollow portion in the conical portion has a tapered portion configured such that a sectional area of the hollow portion decreases toward the front end.
1 Assignment
0 Petitions
Accused Products
Abstract
A protection tube thermocouple (5) includes a thermocouple (52), and a protection tube (51) which accommodates the thermocouple (52). The protection tube (51) includes a conical portion (511) formed on a front end. (54) side of the protection tube (51); and a hollow portion (53) which extends in the length direction of the protection tube (51) for connecting between a front end (54) and a rear end (55) of the protection tube (51) in the inside of the protection tube (51), and into which the thermocouple (52) is received. The hollow portion (53) in the conical portion (511) has a tapered portion (532) configured such that the sectional area of the hollow portion (53) decreases toward the front end (54).
7 Citations
7 Claims
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1. A deterioration detection device provided with a protection tube thermocouple for detecting deterioration of the protection tube thermocouple by applying current to the protection tube thermocouple, wherein
the protection tube thermocouple includes a thermocouple, and a protection tube which accommodates the thermocouple, the protection tube includes: -
a conical portion formed on a front end side of the protection tube; and a hollow portion which extends in a length direction of the protection tube for connecting between a front end and a rear end of the protection tube in the inside of the protection tube, and into which the thermocouple is received, and the hollow portion in the conical portion has a tapered portion configured such that a sectional area of the hollow portion decreases toward the front end. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A thermocouple test device for detecting deterioration of a protection tube thermocouple provided with a protection tube including a contact portion, the contact portion being a portion with which a mixing object comes into contact, and a thermocouple accommodated in the protection tube, comprising:
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a current supply control unit which supplies current to the thermocouple during a predetermined first time period; a time period elapse judging unit which judges whether a predetermined second time period has elapsed after the first time period has elapsed; an approximation calculating unit which calculates an approximation representing time-wise lowering of ambient temperature of the thermocouple, with use of a temperature measured during a sampling time period after the time period elapse judging unit judges that the second time period has elapsed, out of temperatures measured with use of the protection tube thermocouple; a subtraction unit which calculates a subtraction value obtained by subtracting a temperature represented by the approximation calculated by the approximation calculating unit, from a temperature measured with use of the protection tube thermocouple during the second time period; a wear determination unit which determines whether the contact portion is worn away on the basis of the subtraction value; and an alert unit which notifies a result of determination by the wear determination unit.
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Specification