JPS5848348Y2 - Blast furnace tuyere fixing device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a device for fixing the tuyere of a blast furnace.

Conventionally, the tuyere of a blast furnace has been fixed by supporting the rear end of the large tuyere with a tuyere fixing device welded to the inner surface of the metal fitting.

One example of such a fixation device is as shown in FIG.

In the figure, 1 is the shell of the blast furnace, 2 is the tuyere bracket attached to the shell, 3 is the large tuyere, 4 is the small tuyere, and 5 is the tuyere tension hardware.

Reference numeral 6 denotes a plurality of tuyere fixing devices, and at a position close to the rear end of the large tuyere at a predetermined mounting position, the tuyere receiver is fixed to a fixing fitting 7 welded to the inner surface of the metal fitting 2, and a fixing fitting 7 is attached to the fixing fitting 7 in the axial direction of the tuyere. It consists of a tuyere push bolt 8 that is screwed together and rotated along the tuyere and can move forward and backward, and by appropriately rotating the tuyere push bolt 8, the rear end of the large tuyere 3 is pushed and the tuyere is supported and fixed. .

The conventional tuyere fixing device as described above has the following drawbacks.

(1) The tuyere fixing position is located at the smaller inner diameter of the hardware 2, and it becomes an obstacle when removing the large tuyere. Therefore, when removing the large tuyere, the fixing fitting 7 is cut by melting and the grinder finish is applied. After that, the large tuyere was removed, and after the large tuyere was installed, the fixing fittings were welded and installed again.

This welding work takes about 15 minutes/1 piece x 4 pieces = 60 minutes, and is a critical pass not only for sudden replacement of the paneling but also for periodic replacement.

Improving this work is essential to shorten the blast furnace downtime.

(2) The above welding work is performed under adverse conditions such as high temperatures and narrow spaces.

In particular, the welding of the fixed hardware on the upper side of the hardware is
Since the welding is upward welding, it is difficult to ensure the safety of welding workers.

The present invention eliminates the drawbacks of the conventional device, does not cause any hindrance to the installation and removal of the large tuyere, and performs fusing, finishing, and maintenance every time it is replaced.
To provide a siding fixing device that does not require work such as welding and has a strong siding supporting capacity.

In the device of the present invention, the tuyere holder is located near the rear end of the inner surface of the hardware.
A plurality of small stoppers are provided at the large diameter part, and the L-shaped siding fixing plate is supported with its rear end in contact with the stopper. A tuyere push bolt is screwed into the front end (L-shaped rising part) close to the rear end of the mouth so that it can move forward and backward by rotation, and by rotating the bolt, the rear end of the large tuyere is supported and the tuyere is This is to fix the

FIG. 2 shows a cross section of the blast furnace tuyere including the tuyere fixing device of the present invention, in which 1 is the shell of the blast furnace, 2 is the hardware for the tuyere, 3 is the large tuyere, 4 is the small tuyere, 5 is a tuyere tension hardware.

6' is the panel fixing device of this invention (multiple pieces, usually 4 pieces arranged)
The lining part is a small stopper 9 formed by casting or welding at a position close to the rear end of the hardware 2 (a position with a large inner diameter that does not obstruct the entry and exit of the large tuyere), and a small stopper 9 at the rear of the small stopper 9. Supported end to end, mounting with 10 bolts
The tuyere part is removably fixed to the hardware 2 by an L-shaped tuyere fixing plate 11, and a tuyere push bolt is screwed into the front end of the tuyere fixing plate 11 so that it can move forward and backward by rotation. 8' and more.

FIG. 3 shows a plan view of the panel fixing device of the present invention.

In the siding fixing device of the present invention, the siding part is bolted into the hardware so that its longitudinal direction is along the axial direction of the siding, and the L
The length is such that the rising portion (front end) of the shape approaches the rear end of the large tuyere attachment position.

By rotating the siding bolt 8', the tip of the bolt pushes the rear end of the large tuyere to fixedly support the siding, and its supporting force is sufficiently strong due to the bolts and small stopper that are attached.

All bolts are made of stainless steel to prevent rust.

When replacing the large tuyere, the siding fixing device of the present invention can be easily removed from the fixed position by loosening the push port I/8' and removing the bolt 10.
Because of its formation position as described above, it does not become an obstacle to the entry and exit of the tuyere.

In addition, for installing the large tuyere, after installing the large tuyere, install the siding fixing plate 11.
, and attach it with the rear end in contact with the small stopper 9 using bolt 1.
0, fix the siding part to the hardware 2, and tighten the siding bolt 8.
The tuyere can be easily fixed by rotating the tuyere and pushing the large tuyere with appropriate pressure.

The above-mentioned large tuyere replacement is extremely easy and does not require any conventional work such as fusing, finishing, welding, etc., and the safety of the work is improved.

Moreover, by eliminating the above-mentioned welding and other operations, there is also the effect of shortening the large tuyere replacement operation by about 30 minutes, which brings great benefits to the efficiency of blast furnace operation.

[Brief explanation of the drawing]

Figure 1 is a diagram of the siding section of a blast furnace including a conventional siding fixing device;
FIG. 2 is a view of the siding part of a blast furnace including the siding fixing device of the present invention, and FIG. 3 is an enlarged plan view of the siding fixing device of the present invention. 1: Iron skin, 2: Hardware for the tuyeres, 3: Large tuyere, 4: Small tuyere, 5: Tuyere tension hardware, 6.6': Tuyere fixing device, 7: Fixing fittings, 8.8': Tuyere Push bolt, 9: Small stopper 10: Mounting bolt, 11: Tuyere fixing plate.

Claims (1)

[Scope of utility model registration request] The siding support has a small stopper formed by casting or welding at a position close to the rear end of the inner surface of the hardware, with a large inner diameter that does not interfere with tuyere replacement, and is supported with its rear end in contact with the small stopper. Along the axial direction, the siding support is screwed into an L-shaped siding fixing plate that is removably bolted to the hardware, and to an L-shaped rising portion at the tip of the siding fixing plate, and is movably engaged with the siding plate. A blast furnace siding fixing device consisting of a siding bolt whose tip touches the rear end of a large tuyere and supports and fixes it.