JP2008214720A - Rod-fitting jig for molten iron tapping hole-opening machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rod-fitting jig for molten iron tapping hole-opening machine with which not only the hole-opening rod can surely be prevented from being through-out from a socket, but also, this through-out preventive structure is simple and the fitting/removing of this through-out preventive metallic tool is easily performed. <P>SOLUTION: Under state of fitting the hole-opening rod 6 having a pair of guide stoppers 6a on the outer peripheral surface along the axial direction of the end edge part, to the socket 10 fixed to the end part of a joint part of a hole-drilling machine main body through a rod inserting hole 10a disposed at an axial center part; this rod-fitting jig is constituted so as to fit the through-out preventive metallic tool for fitting a lock type engaging bar which can be engaged with the other end of the pipe, by fitting with a spring and the extending position thereof fitted to the one end part of this pipe body, to a pipe body. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rod mounting jig for a tap opening machine, and in particular, proposes an improved rod mounting jig so that the opening rod mounted in the socket does not loosen and come out.

  FIG. 1 shows a schematic configuration of a general tap opening machine. The tap hole opening machine shown in this figure is supported so that the guide cell 5 can be moved forward and backward through the main frame 3 and the hanger frame 4 pivotally supported by the deck 2 toward the furnace wall of the blast furnace 1. On the other hand, the guide cell 5 supports the aperture rod 6 via the rod hanger 7 so as to move back and forth and rotate, and the aperture rod 6 is attached to the drilling machine main body 8 at the rear of the guide cell 5. It is configured to be detachably connected to the joint portion 8a.

  In the sprue opening machine with such a configuration, when the hole rod is rotated forward and forward by striking and rotating first, the refractory (mud) of the spout opening 9 is sequentially dug in the thickness direction. Then, exchanging the opening rod 6 a plurality of times, digging and breaking through the remaining thickness to open the tap hole. On the other hand, the punched rod 6 that has been driven is subjected to reverse rotation-reverse impact on the drilling machine main body 8 to be removed from the tap hole 9.

  In addition, since the tap opening operation is performed at a high temperature, the tip of the aperture rod is often melted or bent due to such influence. Therefore, exchanging the aperture rod is one of the frequently performed operations. However, this exchanging work of the opening rod is generally carried out manually just above the large fence before the exit, and the operator usually has no scaffold, so it is difficult to secure the working posture, In addition, since the work is performed in a high-temperature atmosphere and there is a risk of falling into the cage, there is a need for improvement.

  In response to such demands, conventionally, a rod mounting jig has been devised that can replace the aperture rod safely and easily. For example, a sprue opening machine is a machine that opens a spout of a blast furnace, and hits, rotates, and pulls out (reverse feed) to drilling tools such as cones and button pits attached to the tip of the open rod ) And pulling out the drilling tool to open the tap hole.

  In addition, in order to attach the aperture rod to the rod mounting jig 5, a chain or cotter is used (Patent Document 1, Patent Document 2). However, in these rod jigs, the impact when pulling back the hole rod with a reverse impact acts on one side of the cotter, so the cotter is easily damaged, and the chain is also damaged by the impact, so it is durable. There is a big problem in terms of sex.

  On the other hand, there is also known one that automatically attaches and detaches the aperture rod by remote control using a hydraulic or pneumatic cylinder (Patent Document 3). Such an automatic detachable rod mounting jig has an eccentric structure and thus has a disadvantage that the rotation balance is poor and the structure is complicated.

  In addition, since a lock mechanism and screw threading means are adopted for the rod mounting jig and the aperture rod or Shanks screw rod (power transmission shaft), when the aperture rod is driven into the outlet and removed, In addition to the disadvantage that the screwing of the chucking is easy to come off during reverse rotation of the Shanks screw rod, the cotter engaged with the aperture rod is damaged, and various troubles that occur during work must be improved. There was a problem of not becoming.

As described above, the above-described prior art still has many problems to be solved, but in particular, when the aperture rod is pulled out, when the reverse rotation-reverse impact is applied, the engaged state is loosened and exposed, In addition, the mounting jig may be damaged.
In addition, when the button pit is attached to the tip of the aperture rod instead of a cone and the spout is cut, the button pit is heavy and the aperture rod is bent and detached from the socket. There was also a problem of promoting.

Therefore, the present invention not only reliably prevents the opening rod from being detached from the socket, but also has a simple structure for preventing the opening rod from being removed, and an outlet opening device that can be easily attached and detached. The purpose is to propose a rod mounting jig.
JP 60-145305 A Japanese Utility Model Publication No. 62-182961 Japanese Utility Model Publication No. 57-192946

  As a result of intensive investigations on the above-described problems of the prior art relating to the dropout of the open rod from the socket, the present inventors have developed a metal fitting that can effectively prevent this dropout and develop the present invention. Arrived.

  That is, the present invention is a jig for detachably attaching a hole rod tail end portion to a socket fixed to a joint portion tip of a hole drilling machine main body, and comprising a shaft of the hole rod tail end portion. An opening rod provided with a guide stopper projecting in a wing shape on the outer peripheral surface along the direction, and a rod insertion hole in the shaft center portion, and the tail end portion of the opening rod in the rod insertion hole A socket provided so that a stopper locking window is positioned at a position opposite to the guide stopper in the mounted state; a spring attached to one end of the pipe body with respect to the U-shaped pipe body; and the spring And a retaining bracket to which a hook-shaped locking bar that can be locked to the other end of the pipe body is mounted. Opening machine rod equipment A jig.

  Further, in the present invention, when the guide stopper of the aperture rod is locked to the stopper locking window to prevent the aperture rod from being inserted, the aperture rod is inserted into the rod insertion hole in the socket, and then the circumferential direction Rotating to provide a more effective solution.

  Further, in the present invention, the U-shaped pipe body of the retaining bracket is inserted into the guide stopper insertion groove of the rod insertion hole in a state where the tail end portion of the opening rod is mounted in the socket, It is more effective to elastically lock the tip of the hook-shaped locking rod to the other end of the U-shaped pipe exposed in the stopper locking window to prevent the opening rod from being removed. It becomes a solution.

  By adopting the above solution, in the present invention, the detachment (extraction) of the aperture rod from the socket can be surely prevented. Moreover, according to the rod mounting jig of the present invention, the mounting operation of the aperture rod, that is, the mounting / removing operation can be easily performed, and the operation can be performed in a short time, and the repairing of the spout opening is performed. Work safety can also be realized. As a result, the use of the jig according to the present invention reduces the number of continuous dredging (performing dredging from the same dredging port) when performing the blast furnace pre-operation, and the furnace dredging in the circumferential direction. Can be distributed in a balanced manner, contributing to stabilization of the blast furnace conditions.

  FIG. 2 shows an example of a preferred embodiment of the rod mounting jig according to the present invention. This rod device jig is an opening rod for the socket 10 fixed to the tip of the joint portion 8a of the drilling machine main body 8 that performs forward-reverse rotation, forward-reverse impact, and forward-reverse operations. 6 is a jig that inserts and attaches the tail end of 6 in a detachable manner.

  As described above, the jig is mainly composed of the opening rod 6 and the socket 10 and the retaining metal fitting 11 for preventing the opening rod 6 from coming out (disengaged) from the socket 10. Yes.

  The opening rod can be attached with a drilling tool such as a cone or a button pit (fixing hole repair fitting) at its tip, and its tail end (return) is inserted into the rod insertion hole 10a of the socket. Therefore, a pair of guide stoppers 6a and 6b having ridges projecting in a wing shape are provided on the outer peripheral surface along the axial direction.

  Next, as shown in FIGS. 2 (a) to 2 (c), the socket 10 has the above-described rod insertion hole 10a for receiving the tail end portion of the opening rod 6 to be mounted formed in the center of the shaft. Of course, this hole is a hole having a cross-sectional hole shape corresponding to the guide stoppers 6a and 6b, in which the guide stopper insertion grooves 12 and 12 'are continuously provided. And this socket 10 is the radial direction of the part (opposing position) where the guide stoppers 6a and 6b are located in a state where the tail end portion of the aperture rod 6 is inserted into the rod insertion hole 10a. A pair of stopper locking windows 10b and 10b 'are provided so as to be formed so as to penetrate to the outer surface.

  Therefore, in the socket 10 configured as described above, as shown in FIGS. 3 (a) and 3 (b), it is inserted into the rod insertion holes 6a and 6b at the tail end portion of the aperture rod 6 that is inserted and mounted. Since the protruding guide stoppers 6a and 6b are engaged with the stepped portions in the stopper locking windows 10b and 10b 'by rotating the rod, a retaining function is exhibited. That is, as shown in FIG. 3C, the guide stoppers 6a and 6b abut against one of the wall surfaces of the stopper locking windows 10b and 10b 'to be retained.

  However, when the hole drilling machine main body 8 operates in the normal rotation-reverse rotation and the normal strike-reverse strike simultaneously, when the forward-reverse operation is performed, the above-mentioned locked state is often loosened and released. In particular, when a button pit is attached to the tip of the aperture rod and the spout is cut, the aperture rod is bent. Therefore, since the aperture rod is rotationally driven in a bent state, the aperture rod rotates while being bent, so that the rear end of the aperture rod in the socket 10 is so-called “fluctuated” and easily comes off. For this measure, in the present invention, in particular, the retaining metal fitting 11 having the configuration according to the following description is adopted.

  That is, as shown in FIG. 4, the retaining metal fitting 11 is formed at one end (shorter side) of the pipe body 11a with respect to the U-shaped pipe body 11a (preferably one of which is long J-shaped). One end of the coiled spring 11b is fixed, and a hook-shaped locking bar 11c is attached to the other end, that is, the extension position of the spring 11b. The free end of the hook-shaped locking bar 11c is The pipe main body 11a is configured to be fitted into the open end of the other end (long side).

  5 (a) and 5 (b) show how to use the retaining bracket 11 which is a characteristic configuration of the present invention. As shown in this figure, when the aperture rod 6 inserted and mounted in the rod insertion hole 10a of the socket 10 is rotated, the guide stoppers 6a and 6b thereof are stopper engaging members as shown in FIG. 3B. In the state engaged with the stepped portions of the stop windows 10b and 10b ', the retaining metal fitting 11 is attached through the guide sputter insertion groove 12 portion continuously provided in the rod insertion hole 10a.

  That is, the pipe main body 11a of the retaining bracket 11 is inserted into the guide stopper insertion groove 12 and the free end of the pipe main body is guided to the stopper locking window 10b while the hook-shaped locking rod The free end portion of 11c is inserted from the stopper locking window 10b of the socket 10, and the opening end portion of the pipe body 11a exposed in the stopper locking window 10b is locked using the elasticity of the spring. . Thus, when the retaining bracket 11 is attached to the socket 10, the guide stopper 6a of the aperture rod 6 is obstructed by the pipe body 11a accommodated in the guide stopper insertion groove 12, Rotation is also restricted in the direction of, and so-called slipping out is eliminated.

  By adopting such a rod mounting jig having the retaining metal fitting 11, the removal of the rod is completely eliminated and the occurrence of the continuous galling mentioned above is eliminated, which is effective for stabilizing the brewing operation and stabilizing the blast furnace operation. Brought about.

  The rod mounting jig of the present invention can be effectively used not only for the tap hole opening work but also for the tap hole repair work using a button pit and other work.

It is a schematic drawing of a sprue opening machine. It is the front view and sectional drawing of a rod mounting jig which show the state before mounting | wearing. It is the front view and sectional drawing of a rod mounting jig which show the state after mounting | wearing. It is a front view of a retaining metal fitting. It is the front view and sectional drawing after mounting | wearing with a retaining metal fitting.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Blast furnace 6 Opening rod 6a, 6b Guide stopper 10 Socket 10a Rod insertion hole 10b, 10b 'Rod locking window 11 Detachment metal fitting 11a Pipe main body 11b Spring 11c Trapezoidal locking rod 12 Guide stopper insertion groove

Claims (3)

A jig that detachably attaches a hole rod tail end to a socket fixed to the joint tip of the hole drilling machine body,
On the outer peripheral surface along the axial direction of the aperture rod tail end portion, an aperture rod provided with a guide stopper protruding in a wing shape, and
A rod insertion hole is drilled in the shaft center part, and the opening rod tail end part is provided in the rod insertion hole so that a stopper locking window is located at a position opposite to the guide stopper. A socket with
And, a U-shaped pipe body, a spring attached to one end of the pipe body, and a hook-shaped latch that can be attached to the extension position of the spring and can be locked to the other end of the pipe body A retaining bracket with a stick attached,
It is comprised by the rod mounting jig of the tap hole opening machine characterized by the above-mentioned. When the guide stopper of the aperture rod is locked to the stopper locking window to be removed, the aperture rod is inserted into the rod insertion hole in the socket and then rotated in the circumferential direction. The rod mounting jig of the tap hole opening machine according to claim 1. With the tail end portion of the opening rod mounted in the socket, the U-shaped pipe body of the retaining metal fitting is inserted into the guide stopper insertion groove of the rod insertion hole, and into the stopper locking window. 3. The opening rod is prevented from being pulled out by elastically locking a tip end portion of the hook-shaped locking rod to the other end of the exposed U-shaped pipe. Rod mounting jig for the tap hole opening machine described.

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