A special bolt for fixing the saddle of a heating furnace steel charging machine
A technology for machine saddle and furnace loading steel, applied in the directions of bolts, screws, nuts, etc., can solve the problems of affecting normal use, difficult to disassemble bolts, long time for replacement and maintenance, etc., to achieve the effect of easy disassembly
Inactive Publication Date: 2017-02-01
SHANDONG IRON & STEEL CO LTD
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Problems solved by technology
[0002] The saddle of the steel loading machine in the heating furnace of the strip hot rolling mill is fixed on the steel rod by bolts, and the slab is sent to the furnace by the steel rod. During the work, due to the intrusion of iron oxide scale and low-melt matter in the furnace, the bolts The gap between the bolt hole and the bolt hole is filled with sintered iron scale and low-melt matter in the furnace, which makes the bolt and the bolt hole stick together. When the saddle needs to be replaced, the bolt is often difficult to disassemble. Sometimes it is necessary to melt the bolt with carbon arc gouging. After disassembly and replacement, the replacement and maintenance time will be long, which will affect the normal use
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[0013] The present invention will be further described below in conjunction with accompanying drawing of description and specific embodiment:
[0014] Such as figure 1 shown. A special bolt for fixing the saddle of a heating furnace steel loading machine according to the present invention includes a bolt body 1 and a nut 3, the bolt body 1 includes a head and a screw rod, the nut 3 cooperates with the screw rod, and the screw rod Two annular grooves 12 are arranged on it, and the two annular grooves 12 are located at the upper and lower parts of the screw rod respectively, and there is a section of cylindrical shaft 11 between the two annular grooves 12, and a Layer high temperature fiber felt 2.
[0015] Such as figure 2 As shown, the diameter of the columnar shaft 11, that is, the screw rod is φ1, and the diameter of the portion of the screw rod provided with the annular groove 12 is φ2.
[0016] The high temperature fiber mat 2 is fixed in the annular groove 12 by mean...
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A special bolt for fixing a saddle of a steel charge machine of a heating furnace structurally comprises a bolt body and nuts, the bolt body comprises heads and a threaded rod, the threaded rod is provided with two annular grooves, a layer of polycrystalline mullite fibrofelt is fixed in each annular groove by means of adhesion, and the external diameter of the polycrystalline mullite fibrofelt is 1mm larger than the diameter of the threaded rod. The special bolt for fixing the saddle of the steel charge machine of the heating furnace has the advantages that a columnar rod body between the two annular grooves plays a role in positioning, the polycrystalline mullite fibrofelt is used for preventing oxide scales and in-furnace low-melting-point articles from intruding into the gaps between the bolt and bolt holes, and a non-adhesive isolation layer existing between the bolt and the bolt holes is guaranteed, so that bolt detachment is facilitated; the defects that the fixed bolt is difficult to detach during saddle replacement due to proneness to adhesion between the bolt and the bolt holes and the like in the prior art are overcome.
Description
technical field [0001] The invention relates to the technical field of fixing the saddle of a heating furnace steel charging machine, in particular to a special bolt for fixing the saddle of a heating furnace steel charging machine. Background technique [0002] The saddle of the steel loading machine in the heating furnace of the strip hot rolling mill is fixed on the steel rod by bolts, and the slab is sent to the furnace by the steel rod. During the work, due to the intrusion of iron oxide scale and low-melt matter in the furnace, the bolts The gap between the bolt hole and the bolt hole is filled with sintered iron scale and low-melt matter in the furnace, which makes the bolt and the bolt hole stick together. When the saddle needs to be replaced, the bolt is often difficult to disassemble. Sometimes it is necessary to melt the bolt with carbon arc gouging. After disassembly and replacement, the replacement and maintenance time is long, which affects normal use. Conten...
Claims
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IPC IPC(8): F16B35/04F16B41/00
CPCF16B35/041F16B41/00
Inventor 李清强王振南刘健宋保国赵文承曹文莉
Owner SHANDONG IRON & STEEL CO LTD