Chucks or sockets – Socket type – Side detent
Patent
1986-02-10
1987-07-28
Bilinsky, Z. R.
Chucks or sockets
Socket type
Side detent
279 1SG, 279 20, 266271, 266 45, B23B 3106, C21C 348
Patent
active
046827803
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a perforator for perforating a pig iron discharge opening in a blast furnance. Specifically, this invention pertains to a rod chucking device for holding a perforating rod of the perforator, such as drill rod, blanking rod and the like.
BACKGROUND ART
Conventionally, an opening for discharging pig iron is formed by perforating wall of the blast furnance by means of a perforator. In this case, the perforator comprises a perforating rod, such as drill rod and blanking rod to thereby perform the perforating work. Since the perforating rod wears down remarkably through the perforating work, the perforating rod is necessary to be exchanged frequently and the exchanging work should be done under high temperature of the rod. A chucking device is provided in order to engage the perforating rod with an actuator or impact rod. In conventional chucking devices, the chucking device normally has a structure in which a socket is connected to the impact rod of the perforator, a perforating rod is inserted into a rod hole of the socket to be fixed thereto and the perforating rod is locked through a cotter. In this case, the exchange work of the perforating rod are usually carried out by hand.
It is preferred that the exchange work of the perforating rod is automated because of a hard work under bad conditions, such as high temperature, high dust. For the purpose, it is necessary that the cotter is movable between an engage position and disengage position and the cotter is urged against the engage position by a spring. In the conventional rod chucking device, however, vigorous vibrations are transmitted to the socket through the impact rod to vibrate the spring violently during operation As the result the spring is heated to the temperature of 300.degree. C.-400.degree. C. within a short time to produce a deterioration of material, spring constant and tensile strength resulting in losing spring function, fracture in only 20-30 minute use, and increase of wear.
Under these circumstances, it is suggested that materials having a high strength properties at high temperature, such as Inconel, are employed for the spring. However, since the spring of Inconel is very expensive and the spring is necessary to be exchanged frequently because of its short life, it will not be allowable in the cost.
DISCLOSURE OF THE INVENTION
An object of the invention is to provide a rod chucking device for a perforator for forming pig iron discharge openings of a blast furnance which can solve the above problem.
A further object of the invention is to provide a rod chucking device of which perforating rod can be exchanged automatically and is inexpensive and durable.
In order to accomplish the above objects, the rod chucking device in accordance with the present invention characterized by a socket being connected with a tip end portion of a impact rod of a perforator at the rear end portion, a rod insert hole being formed at the front portion of the socket to mount the perforating rod thereto, a cotter for securing the perforating rod to a cotter hole formed in the socket perpendicular to the rod insert hole being disposed movably between an engage position and a disengage position, a spring being provided for urging the cotter to the engage position, a rod connecting hole for connecting the impact rod to the socket being communicated with a spring mount hole through an air passage, air from the impact rod being injected to the spring mount hole through the air passage to thereby chill the spring.
According to the present invention, a part of the air supplied to the perforating rod through the impact rod is always supplied for chilling the spring to thereby restrain undesirable heating of the spring to improve the duration thereof. Further, the cotter is adapted to move between the engage position and the disengage position, and be urged against the engage position so that automating of exchange of the perforating rods can be readily accomplished.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is longitudin
REFERENCES:
patent: 2448278 (1948-08-01), Ronning
patent: 3762264 (1973-10-01), Scott
patent: 4402519 (1983-09-01), Meaden et al.
Kurama Kenichiro
Shibata Michiyasu
Bilinsky Z. R.
Dougas A.
Mazda Motor Corporation
Nippon Kokan Kabushiki Kaisha
LandOfFree
Rod chucking device for a perforator for perforating a pig iron does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rod chucking device for a perforator for perforating a pig iron , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rod chucking device for a perforator for perforating a pig iron will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2031429