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Title:
OPERATION SENSOR OF STEAM TRAP
Document Type and Number:
WIPO Patent Application WO/1988/005886
Kind Code:
A1
Abstract:
The operation sensor of a steam trap is used for judging the operating condition of a steam trap used in various installations using a steam and consists of an oscillation detection portion (1) and an operation processing portion (50) for operation processing the signals detected by the oscillation detection portion and outputting the results. The detection portion (1) includes a detection needle (2) brought into contact with an object of detection at a predetermined pressure urged by a flexible member and detecting mechanical oscillation of the detection object resulting from the steam flow and condensation flow in the object, an oscillation plate (21) for generating ultrasonic oscillation by the mechanical oscillation detected by the detection needle (2), an oscillation sensor (16) disposed so as to oppose the oscillation plate (21) and converting the ultrasonic oscillation to an electrical signal and a circuit substrate (20) including an amplification circuit for suitably amplifying the output from the oscillation sensor (16) and transmitting it to the outside. The operation processing portion (50) includes memory (M) for storing data corresponding to steam traps of various types inclusive of the detection object, a central processing unit (CPU) for performing operation by comparing the output of the detection portion transmitted from the detection portion (1) with predetermined data obtained selectively from the stored data of memory (M) and output portions (D; S) for displaying the result of operation by the central processing unit (CPU) and/or generating an audible output with an audio frequency. The operation sensor includes a temperature sensor (10) added to the tip of the detection needle (2) of the detection portion and can detect the temperature and/or steam pressure of the detection object. Accordingly, the operating condition of the steam trap can be judged more accurately.

Inventors:
YUMOTO HIDEAKI (JP)
YONEMURA MASAO (JP)
NAGASE MAMORU (JP)
YAMADA YOSHITO (JP)
FUJIWARA YOSHIYASU (JP)
OKAMOTO MASAKATSU (JP)
HOSOKAWA YASUTOSHI (JP)
Application Number:
PCT/JP1988/000118
Publication Date:
August 11, 1988
Filing Date:
February 08, 1988
Export Citation:
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Assignee:
TLV CO LTD (JP)
International Classes:
F16T1/48; G01H11/06; G01H11/08; (IPC1-7): F16T1/48; G01H11/08; G01H11/06
Foreign References:
JPS56109025U1981-08-24
JPS61197400U1986-12-09
JPS59222697A1984-12-14
Other References:
See also references of EP 0402463A4
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