Mitsubishi Heavy Industries Limited

Ngk Insulators, Inc.

Ngk Insulators, Ltd. and Mitsubishi Heavy Industries, Ltd.

Keita Inoue

Yuji Nakagawa

Yasuhiro Terashima

Minoru Ike

Tetsuo Takahashi

Norihiko Orita

Yasunori Terabe

Kentaro Saeki

Kazuo Yamamura

Kazuhiro Mizuno

Shigeo Ito

Toshio Shibata

Ryuta Maruyama

Yuzo Kawahara

Takeo Takaishi

Kenshi Yoshida

Chuhachi Goto

A fireproof structure protects water pipes with stable durability even in a high temperature gas environment. Even in a case where it falls off, it does not leave the water pipes suddenly exposed. The fireproof structure for protecting water pipesB installed on water pipe walls of a combustion gas side is configured by a double-layered structure made up of an outer layer water pipe protective structure facing towards the combustion gas side, which is fireproof tile, and an inner layer water pipe protective structure provided between the outer layer water pipe protective structure and the water pipes, which is fireproof castable. The thickness ratio between the castableand the tileslies within the range of about 2:1 to 3:1, and the ratio between the thickness of the fireproof castable and the radius of the water pipe is set to 1+&#x3b1;:1, wherein the value of &#x3b1; ranges from approximately 0.1 to 0.3. The water pipes are equipped with hanging hooksfor tiles

Fireproof structure and installation method for protecting water pipes

This invention concerns a heat-resistant assembly having a heat-resistant block conformed to the contours of boiler tubes and the surface of their connecting rib. The heat-resistant assembly has an arm which protrudes from the surface of the rib toward the heat-resistant block and which has a catch on the end. The block has an indentation in which the catch on the arm engages. The block can be hung on or removed from the tube assembly by means of the arms and indentations. The heat-resistant assembly is further distinguished by the fact that a space is created between the end of the arm and the indentation of the block. A fusible substance, which will melt when the temperature of the arm exceeds a given value, is placed in the space. The heat-resistant assembly is further distinguished by the fact that an indentation is formed in the block in which a heat-resistant sleeve is adhered to engage the arm. This arrangement makes it possible to manufacture the heat-resistant block using press molding.

Heat-resistant assembly for protecting boiler tubes and method of assembling same

An installation for protecting water pipes is easily installed, even in areas of a water pipe wall where bends exist, can be inexpensively manufactured, and delivers stable longevity in high temperature environments. A refractory castable process embeds refractory castablein concave areas between adjacent water pipes, at least in bend areaswhere the pipes bend, to create an approximately flat surface on the water pipe wallthat faces the high temperature side. A refractory tile process installs approximately flat-shaped refractory tilesover the surface of the embedded refractory castableThis refractory tile process for the refractory tileincludes a process to insert fastening memberspreviously installed on the foregoing water pipeinto a groove formed in the refractory tilesto hold the tiles in place and a process to bind the refractory tilesto the embedded refractory castable with an adhesive material.

Installation method of fireproof structure for protecting water pipes

A support fitting for the heat-resistant block to protect boiler tubes, which protrudes upward at a right angle from the surface of the rib between two boiler tubes, and which is welded on the rib and has a catch to engage with the heat-resistant block on the end. The support fitting is provided with a welding surface to be welded on the rib and shaped narrower by chamfering, and a single globule of a deoxidizing conductive material used as flux is attached to the narrowed welding surface, and is a vertical piece or rod which extends a fixed distance perpendicular from the rib. The support fitting includes a first upper surface being kept horizontal to support a ferrule, which can tightly engage with the ferrule for arc stud welding, thereby the ferrule can shield the welding surface, and a second upper surface which engages with the heat-resistant block.

Fire-resistant structural body supporting metal bar for protection of water pipe

A heat-resistant assembly having a heat-resistant block conformed to the contours of boiler tubes and the surface of their connecting rib. The heat-resistant assembly has an arm which protrudes from the surface of the rib toward the heat-resistant block and which has a catch on the end. The block has an indentation in which the catch on the arm engages. The block can be hung on or removed from the tube assembly by means of the arms and indentations. The heat-resistant assembly is further distinguished by the fact that a space is created between the end of the arm and the indentation of the block. A fusible substance, which will melt when the temperature of the arm exceeds a given value, is placed in the space. The heat-resistant sleeve is adhered to engage the arm. This arrangement makes it possible to manufacture the heat-resistant block using press molding.

Water tube protective refractory structure and method of assembling the same

A boiler tube protector having a cylindrical or semi-cylindrical shape and adapted to be attached around an outer peripheral face of a boiler tube with mortar, which boiler tube protector includes a plurality of ceramic bodies closely arranged along their parting planes, wherein the parting planes includes a restraining portion for restraining slippage of each of the ceramic bodies.

Boiler tube protector and a method for attaching such protector to a

A method of attaching a boiler tube protectors having a cylindrical or semi-cylindrical shape around an outer peripheral face of a boiler tube with mortar, which boiler tube protectors, are a plurality of ceramic bodies closely arranged along their parting planes, wherein the parting planes includes means for restraining slippage of each of the ceramic bodies along the parting planes.

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Yokohama, Japan

Keita Inoue