Okazaki Manufacturing Company

Honda Motor Co., Ltd.

Electric Power Development Co., Ltd.

Masaru Yamana

Kazuhide Okazaki

Toshiyuki Saijo

Naoki Maruno

Toshinori Yasutomi

Makoto Terada

Takao Michinoshita

Masaji Sawa

Naoki Takata

Hideo Obi

Kazuo Okazaki

A crack detection device for detecting a crack that occurs in a structure, includes: an MI cable that includes a metal sheath and a conductive wire accommodated in the metal sheath via a mineral insulating powder, and that is disposed along the structure so as to intersect an assumed crack C in a part of the structure where occurrence of a crack is assumed; a joint portion that is made of a metal that forms a joint when solidified from a melting state, and that joins the MI cable to the structure or a member fixed to the structure; and a detection device connected to both ends of a conductive wire, and configured to detect electrical characteristics of the conductive wire. The joint portion is present on one side and the other side with respect to the assumed crack C in a direction intersecting the assumed crack C.

Crack detection device

A sheathed thermocouple includes thermocouple wires; a metal sheath accommodating the thermocouple wires; inorganic insulating material powder filled in an internal space of the metal sheath; a glass seal part tightly sealing an opening of the metal sheath while allowing the thermocouple wires to pass; compensation lead wires connected to the thermocouple wires; a metal sleeve having a cylindrical shape having a leading end part defining a connecting section connected with an outer peripheral surface of the metal sheath, and allowing a portion of the metal sheath closer to a proximal end than the connecting section, the thermocouple wires and the compensation lead wires to be in an internal space, the thermocouple wires and the compensation lead wires lying without contact between themselves; and a glass filler part made of a glass having a lower softening temperature than the glass seal part, and filling an internal space of the metal sleeve.

Sheathed thermocouple and method for manufacturing sheathed thermocouple

A pad-equipped thermocouple includes a sheathed thermocouple in which a pair of thermocouple elements and an inorganic insulating powder for holding the thermocouple elements are accommodated in a sheath. An opening of the sheath is sealed by a sealing member. A pad is welded to a pipe and configured to hold the sheathed thermocouple to a surface of the pipe. A temperature measuring junction formed by the pair of thermocouple elements is exposed to a side face of the sheath in a leading end portion. The pad includes an accommodation portion accommodating the leading end portion such that the leading end portion can be inserted into and pulled out from the accommodation portion along the surface of the pipe, and the accommodation portion accommodates the leading end portion in a state where the temperature measuring junction and the surface of the pipe are in contact with each other.

Pad-equipped thermocouple and method for producing sheath thermocouple used therein

A terminal head, which is provided in a sheath type temperature sensor and is for connecting the sheath type temperature sensor and a cable, is structured such that, in order for replacement of the sheath type temperature sensor to be easily performed and in order to minimize the number of replacement parts, a terminal plate () of the terminal head () and the sheath type temperature sensorare coupled using a pair of plug-in connectors () and the coupling is held by a coupling nut (). When replacing the sheath type temperature sensor (), the leads () of the sheath type temperature sensor do not need to be detached from and attached to the terminal plate () at the replacement worksite, and the only replaced part other than the sheath type temperature sensor () is the one connector ().

Terminal head of sheath type temperature sensor

The present invention relates to an in-furnace temperature measurement devicefor a furnace in which gas is generated. The measurement deviceincludes: a support tubewhich communicates with a measurement holeA which leads to an inside of the furnace; a sensor protection tubeinserted into the support tubeso as to be movable in an axial direction with a leading end, of the sensor protection tube, facing a furnace side; a plurality of seal ringsA andB which hermetically seal a gap between the support tubeand the sensor protection tubeand which are arranged at an interval so as to divide the gap into a plurality of space portions in the axial direction; a temperature sensorhoused in the sensor protection tubesuch that a temperature-sensing portion of the temperature sensorcorresponds to a leading-end portion of the sensor protection tube; and a drive mechanismwhich drives the leading-end portion of the sensor protection tubeso as to be able to advance and retract in the axial direction with respect to the inside of the furnace through the measurement holeA, while maintaining a sealed state by the seal ringsA andB.

In-furnace temperature measurement device

In a prior-art nail puncture test, it has been difficult to measure the temperature at a short-circuiting portion, which is closely related to the scale of an accident which occurs. As a solution, A nail puncture test device having a temperature measurement function, a sheath thermocouple, and a fixing portionof the sheath thermocouple, wherein a bottomed hole through which the sheath thermocouple is inserted is bored in the axial direction from a head portion to the vicinity of the distal end at the center part of the outer frame, and the sheath thermocouple is fixed to the outer frame by the fixing portionin a state where the sheath thermocouple is inserted into the bottomed hole and the distal end thereof having a temperature measurement point is in contact with the bottom of the hole is provided.

Growing community of inventors

Hyogo, Japan

Masaru Yamana