JPS6028671Y2 - In-furnace rotating chute of bell-less furnace top charging device - Google Patents

Description

[Detailed description of the invention] This invention relates to an in-furnace rotating chute of a bell-less type furnace top charging device, and the tip angle is variable for the purpose of increasing the degree of freedom in controlling the radial particle size distribution of the raw material input into the furnace. This relates to the drive mechanism of the in-furnace rotating chute.

As shown in Fig. 1, a conventional bellless type furnace top charging device has a rotating chute 1 installed on a rotating base inside the furnace that can rotate and tilt independently or simultaneously. The radial distribution of the raw material introduced into the furnace is controlled by changing the tilt angle of the rotating chute inside the furnace.

However, while the raw material charged into the furnace flows down the rotating chute in the furnace, particle size classification occurs.

In other words, as fine grains become coarser particles, an upward particle size distribution occurs on the bottom surface of the rotating chute in the furnace, and the initial velocity energy at the tip of the rotating chute in the furnace differs depending on the particle size. The width of the raw material is widened and the particle size distribution becomes coarser in the radial direction of the furnace.

As a result, in actual operation, the rising gas flow within the charged material becomes uneven, which reduces the utilization rate of the gas in the furnace for the reduction reaction, inhibits the reduction of the fuel ratio, and furthermore, makes the furnace condition unstable. bring about.

In order to solve the problems of conventional equipment, an in-furnace rotating chute with a variable tip angle, as shown in Figure 2, was proposed to increase the degree of freedom in controlling the radial particle size distribution of the raw material input into the furnace. Inward rotating chute body 1-1 and tip chute 1
-2 as shown in FIG. 2, and by fixing one end of the link mechanism to the rotating base 2, a drive mechanism has been devised to change the angle of the tip chute 1-2. ing.

However, the tilting angle of the tip chute 1-2 by the drive mechanism is variable, which is uniquely obtained by the tilting angle of the in-furnace rotating chute body 1-1'.

In addition, the inside of the furnace rotating chute is lined with a wear-resistant liner, but it wears out due to the charged raw materials, so it is necessary to periodically replace the main body of the furnace rotating chute. 2 is fixed inside the furnace, making the fixing work very difficult.

The present invention has a variable tip angle drive mechanism for an in-furnace swiveling chute, in which the tilting angles of the swiveling chute body and the tip of the chute can be adjusted individually or simultaneously, and the swiveling chute can be attached to a supporting shaft. By attaching it to the shaft, it is possible to transmit the axial force for tilting the tip chute.

Next, the drive mechanism of the present invention will be explained with reference to the drawings.

The driving force from the electric motor 4 shown in FIG. 3 is transmitted by a gear train to the rotation gear 5 and the in-furnace rotation chute body tilting gear 6 through a planetary gear mechanism 7.

The gear ratio of this gear train is selected so that the gears 5 and 6 rotate at the same rate when the electric motor 8 for tilting the in-furnace rotating chute main body is not driven.

The transmission to the tip chute tilting gear 9 is carried out from the arm gear 10 of the planetary gear mechanism 7 for tilting the in-furnace rotating chute body through the planetary gear mechanism 11, and the tooth ratio of the gear train is also for tilting the in-furnace rotating chute body. Similarly, the rotation speed of gear 9 is gear 5.
and 6.

The driving force transmitted to each driving gear 5.6.9 is transmitted to the turning ring 12 for turning, the turning ring 13 for tilting the in-furnace turning chute body, and the turning ring 14 for tilting the tip chute shown in FIG. be done.

The turning rings 12, 13, 14 have the same number of teeth, and gears 15, 16 are attached to the tilting turning rings 13, 14.

Further, a swing base 2 is fixed to the swing ring 12.

Therefore, the driving force is transmitted to the swing base 2 and the gears 15 and 16 at the same rotation speed.

The driving force transmitted to each of the tilting gears 15 and 16 is transmitted to the in-furnace rotating chute l-1 at the lower part fixed on the rotating base 2.
A worm gear 22 is attached to a worm gear 20 for tilting the main body of the in-furnace rotating chute and a worm gear 21 for tilting the tip chute of the worm reducer, which is equipped with a triple shaft of the support shaft 17, the in-furnace rotating chute main body tilting shaft 18, and the tip chute tilting shaft 19. , 23 and worms 24 and 25, the gear train is configured such that driving force can be transmitted by gears 15 and 16.

Gears 28 and 29 are provided at each worm gear shaft end to mesh with sector gears 26 and 27 provided at each tilting shaft end, respectively.

The operation of the above-described drive mechanism of the present invention will be explained.

When the tilt drive motors 8 and 30 shown in FIG. 3 are not driven, the swing base 2 and the tilt gears 15 and 16 shown in FIG.
4 and 25 are in a stationary state.

In other words, 1. Only the rotation operation based on the rotation is performed.

If the electric motor 8 for tilting the in-furnace rotating chute body rotates the internal gear of the planetary gear mechanism 7 as shown in FIG. This results in a difference in rotational speed from that of the gear 6.

However, the rotation speed of the tip chute tilting gear 9 is higher than the arm gear 10 of the planetary gear mechanism 7 for tilting the in-furnace rotating chute main body.
Since it is transmitted through the in-furnace swing chute body tilting gear 6, it is the same as the in-furnace swing chute body tilting gear 6.

Therefore, by creating a relative rotation between the swing base 2 and each tilting gear 15.16 shown in FIG. It will rotate .19.

The ratio of the number of teeth in each gear train from each tilting gear 15 and 16 to each tilting shaft 18 and 19 is selected so that each tilting shaft 18, 19 rotates the same.

(When only the electric motor 8 for tilting the main body of the rotating chute in the furnace shown in Fig. 3 is driven) Next, the electric motor 3 for tilting the tip chute shown in Fig. 3 is driven.
0, the rotating base 2, the gear 15 for tilting the main body of the rotating chute, and the gear 16 for tilting the tip chute shown in FIG.
A relative rotation is generated between the two, and rotation is obtained in the tip chute tilting shaft 19 via the worm gear 21.

The drive mechanism of the present invention operates as described above, and each tilting shaft can be operated individually or simultaneously.

In-furnace rotating chute main body tilting shaft 18 shown in FIG.
The transmission structure between the tip chute tilting shaft 19 and the furnace rotating chute having a tip chute tilting link mechanism (not shown) is as shown in FIG.
A tapered groove is provided at the end of the tip chute drive lever 31 as shown in FIGS. 5 and 6.
The in-furnace rotating chute 1-1 with a groove can be inserted from below, and the driving force is transmitted through the side surfaces of the groove.

According to this structure, when installing the in-furnace rotating chute, since the groove provided on each tilting shaft is tapered, the relative position of the in-furnace rotating chute 1-1 and the tip chute tilting lever 31 is It can be easily installed without being subject to severe restrictions.

As described above in detail, the present invention can contribute to controlling the radial particle size distribution of the raw material fed into the furnace with an extremely high degree of freedom, and has great practical value.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of a conventional bell-less type furnace top charging device;
The figure is an explanatory diagram of a conventionally devised variable tip angle in-furnace rotating chute drive mechanism, Figures 3 and 4 are perspective views of the drive mechanism of the present invention, Figure 5 is an enlarged sectional view of the upper part of the same, and Figure 6 The figure is a side view of the tilting shaft in the drive mechanism of the present invention, and FIG. 7 is a conceptual perspective view of the end of the tilting shaft in the drive mechanism of the present invention. 1 is a rotating chute, 2 is a rotating base, 3 is a link mechanism,
4 is an electric motor, 5 is a rotating gear, 6 is a rotating chute main body tilting gear, 7 is a planetary gear mechanism, 8 is an electric motor for tilting the furnace rotating chute main body, 9 is a tip chute tilting gear, 10 is a prowess gear, 11 is a planetary gear mechanism, 12 is a turning ring for turning, 13 is a turning ring for tilting the in-furnace turning chute body, 14 is a turning ring for tip chute turning, 15, 16 is a gear, 17 is a support shaft, 18 is an in-furnace turning Chute body tilting axis; 19, tip chute tilting axis; 20, worm gear for tilting the in-furnace rotating chute body; 21, tip chute tilting gear; 22.2
3 is a gear, 24.25 is a worm, 26.27 is a sector gear, 28.29 is a gear meshing with the sector gear, 30 is a tilting drive electric motor, and 31 is a tip chute tilting lever.

Claims (1)

[Scope of utility model registration request] In the rotating chute of a bell-less furnace top charging device, which has a tip chute attached to the tip of the main body of the in-furnace rotating chute via an angle variable device consisting of a link mechanism, the above-mentioned rotating chute support part is supported. In addition to the concentric triple axis structure of the axis, the rotating chute body tilting axis, and the tip chute tilting axis,
The bellless furnace top is characterized in that the in-furnace rotating chute main body tilting shaft, the in-furnace rotating chute, the tip chute tilting shaft, and the link mechanism are connected through fitting grooves so that they can be operated independently. In-furnace rotating chute of charging equipment.