Coating apparatus – Projection or spray type – Work-supported and guided carriage
Reexamination Certificate
1999-07-23
2001-09-04
Crispino, Richard (Department: 1734)
Coating apparatus
Projection or spray type
Work-supported and guided carriage
C118S300000, C118S305000, C148S668000, C148S669000, C148S670000, C148S671000
Reexamination Certificate
active
06284045
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a monolithic refractory depositing system for repairing a molten metal container, such as a ladle used in a steelworks or the like, or constructing a new molten metal container.
BACKGROUND ART
Conventional monolithic refractory depositing methods for repairing a molten metal container, such as a ladle, or constructing a new molten metal container are classified into spraying methods and casting methods.
Repairing methods using spraying are classified into dry spraying methods and wet spraying methods. A dry spraying method conveys refractory powder to a spraying nozzle by the agency of compressed air, mixes water or binder into the refractory powder in the spraying nozzle to produce refractory slurry, and sprays the refractory slurry by the agency of compressed air. A wet spraying method mixes refractory powder and water to produce a refractory mixture, kneads the refractory mixture to produce refractory slurry, sends the refractory slurry through a spraying pipe by a pump, adds a binder to the refractory slurry in a spraying nozzle, and sprays the mixture of the refractory slurry and the binder by the agency of compressed air onto a desired surface.
A casting method, differing from the spraying method, assembles a form at the site, pours refractory slurry prepared by kneading a mixture of water and a refractory material into the form. Although a refractory structure constructed by a casting method has a dense texture and a long life, the construction of such a refractory structure needs a form inevitably.
Recently, there is a trend to use a wet spraying method capable of forming a high-quality refractory structure having durability comparable to that of a refractory structure formed by a casting method, and satisfactory in homogeneity.
The spraying method is carried out by hand spraying work (manual spraying work requiring an operator to hold and operate a nozzle by hand) or mechanical spraying work using a nozzle driving device. When carrying out the spraying method by hand spraying work, the operator needs to move the heavy nozzle by human power, which requires heavy manual work. Furthermore, the spraying method employing hand spraying has drawbacks that the operator working at the site is exposed to injurious rebound loss and dust, and different operators places the material in different thicknesses.
Although dry nozzle driving devices of various types for driving a spray nozzle have been developed for the dry spraying method, any wet nozzle driving device for driving a spray nozzle, suitable for the wet spraying method has not been developed yet.
As mentioned above, the casting method assembles a form at the site, and pours refractory slurry into the form by a belt conveyor or a chute. Recently, a pump capable of forcibly pumping a highly viscous material has been developed. Most recent casting methods convey a material through hoses by force feed to a casting place.
However, the casting method also needs inefficient, heavy manual work to carry a heavy nozzle to the casting place.
Incidentally, the employment of either the spraying method or the casting method is suitable for some repairing work or construction work, and the employment of both the spraying method and the casting methods is suitable for other repair work or construction work. So far, any construction system capable of executing both the spraying method and the casting method has not been developed. Therefore, when construction work needs to carry out both the spraying method and the casting method, both construction apparatuses for carrying out the spraying method and the casting method must be kept at the site and the construction apparatuses must be changed and necessary one of the construction apparatuses must be installed in place. Work for changing the construction apparatuses takes much time, equipment cost increases because a plurality of construction apparatuses are necessary, and increased maintenance work is necessary for the maintenance of the plurality of construction apparatuses.
DISCLOSURE OF THE INVENTION
Accordingly, it is an object of the present invention to provide a monolithic refractory depositing system capable of solving problems in the prior art, of improving working environment, of improving the efficiency of work and of spraying a material so as to form a homogeneous structure in a uniform thickness.
The monolithic refractory depositing system is capable of carrying out both a spraying method and a casting method.
A monolithic refractory depositing system according to the present invention comprises: a carriage placed on rails laid near a molten metal container so as to travel over the molten metal contain along the rails; a truck mounted on the carriage so as to move in directions perpendicular to the moving directions of the carriage; an elevating frame mounted for vertical movement on the elevating frame; a material feed pipe attached to the elevating frame; and a spray nozzle or a pouring pipe to be detachably connected to a lower end of the material feed pipe.
The truck may be a traverse truck mounted on the carriage so as to move in directions perpendicular to the moving directions of the carriage.
The truck may be tiltable relative to the carriage.
A post may be set up on the truck, and the elevating frame may be supported for vertical movement on the post.
A bendable support means capable of moving together with the elevating frame may be connected to a part of the material feed pipe on an upper side of the elevating frame.
The bendable support means may comprise pipes and a rotary joint joining the pipes together for turning relative to each other.
The monolithic refractory depositing system may be provided with a controller for the automatic control of spraying rate at which a material is sprayed, thickness in which the material is to be deposited and a spraying process according to the shape and size of the molten metal container.
The monolithic refractory depositing system may further comprise a support rod capable of turning and vertically moving along the material feed pipe and disposed in a vertical position, and a thickness measuring device held on a lower end part of the support rod to measure the thickness of a part of a structure being formed.
The material feed pipe may be inserted in an upper part of the elevating frame so as to project from a lower part of the elevating frame and supported on the elevating frame.
The monolithic refractory depositing system may be provided with an extendible mechanism, and the extendible mechanism may be attached to an upper part of the truck to move the elevating frame vertically.
The extendible mechanism may be attached to the truck so as to extend downward from an upper part of the truck.
The extendible mechanism may be a linkage of a pantograph type.
The material feed pipe may be connected to a material feed hose for feeding a material.
The material feed hose may be supported on a hose guide.
The pouring pipe may be turnable about a vertical axis.
The monolithic refractory depositing system may further comprise a pouring traverse truck disposed beside the truck and capable of moving in directions perpendicular to the moving directions of the carriage, a second material feed pipe may be connected to an upper part of the pouring traverse truck, and a second pouring pipe may be disposed on a lower part of the pouring traverse truck so as to be turnable in a horizontal plane.
REFERENCES:
patent: S52-7818 (1977-01-01), None
patent: S59-70461 (1984-04-01), None
patent: S63-154258 (1988-06-01), None
patent: H1-31340 U (1989-09-01), None
patent: H4-7176 U (1992-02-01), None
patent: 6-145742 (1994-05-01), None
patent: H6-48139 (1994-06-01), None
patent: H6-69697 U (1994-09-01), None
patent: H8-25023 (1996-01-01), None
patent: 8-188809 (1996-07-01), None
Kaneshige Toshihiko
Nagai Seiji
Nakamura Ryosuke
Nishimura Keizo
Crispino Richard
Koda & Androlia
Shinagawa Refractories Co. Ltd.
Tadesse Yewebdar T
LandOfFree
Apparatus for building unburned refractory does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for building unburned refractory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for building unburned refractory will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2527207