CN219603616U - Blast furnace tuyere baking furnace guide pipe device - Google Patents

Abstract

The utility model relates to a blast furnace tuyere oven conduit device, which belongs to the technical field of blast furnace hot air oven pipelines in the metallurgical industry. The technical solution is: the horizontal section oven duct (3) and the vertical section oven duct (4) are welded together to form an integrated structure, the small tuyere sleeve (5) is set on the horizontal section oven duct (3), and the small tuyere sleeve ( 5) It is connected with the horizontal oven duct (3) through the balance card (1) and the fixed card (2); ), the balance card (1) is close to the larger diameter end of the small tuyere sleeve (5), and the fixed card (2) is close to the smaller diameter end of the small tuyere sleeve (5). The beneficial effects of the utility model are: it can improve the construction efficiency and personnel safety factor, reduce the high-temperature and high-risk operation time, and meet the installation requirements.

Description

A blast furnace tuyere oven duct device

technical field

The utility model relates to a blast furnace tuyere oven conduit device, which belongs to the technical field of blast furnace hot air oven pipelines in the metallurgical industry.

Background technique

Hot blast ovens are required for the production of new blast furnaces and before the resumption of production of the blast furnace. The purpose is to slowly heat and dry the moisture in the refractory masonry of the blast furnace, and to avoid damage to the brick lining due to severe heating cracking and deformation after production. The hot air delivered by the hot blast stove is sent into the furnace body of the blast furnace through the blowpipe to evenly heat the furnace body and ensure the constant temperature rise of the furnace body. The oven duct is responsible for sending the hot air from the blowpipe to the furnace. The general installation method of the oven duct is to weld the oven duct to the small sleeve of the tuyere, and the welding bracket at the bottom of the duct is fixed on the bottom of the furnace. , in order to prevent the furnace pipe from toppling over, it is necessary to set up three layers of star-shaped brackets at the height of the furnace pipe. Remove the blowpipes of each tuyere outside the furnace, and remove the oven ducts fixed in the small sleeve. When installing, you need to enter the furnace to set up the bracket, and when removing it, you need to enter the furnace to cut off the bracket. When removing the conduit, you need to remove the hot air blowpipe. This process involves restricted space, high-altitude operations, and high-temperature operations when entering the furnace. Construction personnel Safety and work efficiency cannot be guaranteed.

Utility model content

The purpose of the utility model is to provide a blast furnace tuyere oven duct device, which can improve construction efficiency and personnel safety factor, reduce high-temperature and high-risk operation time, meet installation requirements, and solve problems existing in the background technology.

The technical scheme of the utility model is:

A blast furnace tuyere oven duct device, comprising a balance card, a fixed card, a horizontal section oven duct, a vertical section oven duct and a small tuyere sleeve, the horizontal section oven duct and the vertical section oven duct are welded together to form an integrated structure, The included angle α between the furnace duct in the horizontal section and the oven duct in the vertical section is an obtuse angle; the small tuyere sleeve is in the shape of a truncated cone, and the outer diameter of the oven duct in the horizontal section is smaller than the inner hole diameter of the small tuyere sleeve, and the small tuyere sleeve is in the On the horizontal section of the furnace duct, the end of the small tuyere sleeve with a larger diameter is close to the port of the horizontal section of the oven duct, and the end of the small tuyere sleeve with a smaller diameter is close to the connection between the horizontal section of the oven duct and the vertical section of the oven duct, and the tuyere is small The sleeve and the horizontal section of the furnace duct are connected together by a balance card and a fixed card; the balance card and the fixed card are both arc-shaped to match the small tuyere sleeve, and the balance card is close to the larger diameter end of the small tuyere sleeve. The fixed card is near the smaller end of the small sleeve of the tuyere.

There is one balance card, and there are two fixed cards corresponding to the circumferential direction of the furnace duct in the horizontal section.

The radians of the balance card and the fixed card match the taper of the inner hole of the small tuyere sleeve.

The two ends of the balance card and the fixed card are respectively welded together with the furnace conduit in the horizontal section.

The included angle α between the horizontal oven duct and the vertical oven duct is 110 degrees.

By adopting the utility model, personnel do not need to enter the bosh for the second time after the oven is finished, which improves the safety of personnel and reduces the construction workload for removing the duct of the tuyere oven. When removing the furnace duct, on the basis of not damaging the refractory material inside the tuyere sleeve, the balance card and the fixed card can be separated from the horizontal section of the oven duct by impact.

The beneficial effects of the utility model are: it can improve construction efficiency and personnel safety factor, reduce high-temperature and high-risk operation time, meet installation requirements, and has simple structure, easy fabrication and convenient operation.

Description of drawings

Fig. 1 is the schematic diagram of the plane structure of the utility model;

Fig. 2 is the plane structural schematic diagram of oven conduit and tuyere small sleeve;

Fig. 3 is a three-dimensional structural schematic diagram of an oven duct and a small tuyere;

In the figure: 1. Balance card; 2. Fixed card; 3. Horizontal section oven duct; 4. Vertical section oven duct; 5. Small set of tuyere.

Implementation

Below in conjunction with accompanying drawing, the utility model is further described by example.

Referring to the accompanying drawings 1-3, a blast furnace tuyere oven duct device includes a balance card 1, a fixed card 2, a horizontal section oven duct 3, a vertical section oven duct 4 and a tuyere small sleeve 5, and a horizontal section oven duct 3 It is welded together with the vertical section oven duct 4 to form an integrated structure, and the angle α between the horizontal section oven duct 3 and the vertical section oven duct 4 is an obtuse angle; The outer diameter of the conduit 3 is smaller than the inner hole diameter of the small tuyere sleeve 5, and the small tuyere sleeve 5 is set on the horizontal furnace conduit 3, and the larger diameter end of the small tuyere sleeve 5 is close to the port of the horizontal furnace conduit 3, and the small tuyere The end of the sleeve 5 with a smaller diameter is close to the junction of the horizontal section oven duct 3 and the vertical section oven duct 4, and the tuyere small sleeve 5 and the horizontal section oven duct 3 are connected together by a balance card 1 and a fixed card 2; The balance card 1 and the fixed card 2 are all arcs matched with the small tuyere cover 5, the balance card 1 is close to the larger end of the small tuyere 5 diameter, and the fixed card 2 is close to the smaller end of the small tuyere 5 diameter.

In this embodiment, with reference to accompanying drawings 1-3, the manufacture of the horizontal section oven duct 3 needs to determine the diameter according to the size of the inner hole of the small tuyere 5, and it is required to go deep into the small tuyere 5 part and be one-fifth of the distance from the end of the small tuyere 5 One place extends 300mm from the tuyere small sleeve 5, and the cutting angle of the tail end of the furnace duct 3 in the horizontal section is 110 degrees.

Make the card, measure the balance card 1 and the fixed card 2 at the welding position of the oven conduit 3 in the horizontal section. The height of the card 2 is 4mm~7mm, and the arc length is 40mm. The thickness of the balance card 1 needs to be determined according to the weight of the oven duct 4 in the vertical section, generally 1mm~1.5mm.

The balance card 1 is located at 50 mm from the front port of the furnace duct 3 in the horizontal section, and the height needs to be measured in conjunction with the inner taper of the small tuyere 5. The position of the fixed card 2 is 150 mm away from the end port of the horizontal furnace duct 3.

There is one balance card 1, and two fixed cards 2 are symmetrical. When welding, the two ends of the balance card 1 and the fixed card 2 are respectively welded to the horizontal oven duct 3, and the solder joints are kept on the same side as the impact direction.

After the balance card 1 and the fixed card 2 are combined with the furnace duct 3 in the horizontal section, they are installed in the furnace and placed in the small tuyere sleeve 5 .

Make the vertical section oven conduit 4, the cutting angle of the front end face of the vertical section oven conduit 4 is 110 degrees, and the height between the furnace bottom and the tuyere is 300mm.

The furnace conduit 3 in the horizontal section and the furnace conduit 4 in the vertical section of the welding oven are combined in the bosh of the blast furnace. Complete the fabrication and installation of all oven ducts through the above steps.

Remove the oven duct, use a 3-4m long steel pipe with a diameter of about 3cm to extend into the observation hole, hit the steel pipe with a sledgehammer, and the impact force is transmitted to the vertical section of the oven duct 4, so that the oven duct will come out of the small sleeve of the tuyere 5. Just drop into the belly of the blast furnace. Through the above steps, the whole process of making, installing and dismantling the oven duct is completed.

Claims (5)

1. A blast furnace tuyere oven duct device, characterized in that it includes a balance card (1), a fixed card (2), a horizontal section oven duct (3), a vertical section oven duct (4) and a small tuyere cover ( 5), the horizontal oven duct (3) and the vertical oven duct (4) are welded together to form an integrated structure, and the angle between the horizontal oven duct (3) and the vertical oven duct (4) is α It is an obtuse angle; the small tuyere sleeve (5) is in the shape of a truncated cone, the outer diameter of the horizontal section oven duct (3) is smaller than the inner hole diameter of the small tuyere sleeve (5), and the small tuyere sleeve (5) is set on the horizontal section of the oven On the duct (3), the larger diameter end of the small tuyere sleeve (5) is close to the port of the horizontal oven duct (3), and the smaller diameter end of the tuyere sleeve (5) is close to the horizontal section oven duct (3) and At the joint of the vertical section of the oven duct (4), the tuyere small sleeve (5) and the horizontal section of the oven duct (3) are connected together by a balance card (1) and a fixed card (2); the balance card ( 1) and the fixed card (2) are arc-shaped matching with the small tuyere cover (5), the balance card (1) is close to the larger diameter end of the small tuyere cover (5), and the fixed card (2) is close to the small tuyere cover (5) The end with the smaller diameter. 2. A blast furnace tuyere oven duct device according to claim 1, characterized in that: there is one balance card (1), and the fixed card (2) corresponds to the circumferential direction of the oven duct (3) in the horizontal section of two. 3. A blast furnace tuyere oven duct device according to claim 1 or 2, characterized in that: the radian of the balance card (1) and the fixed card (2) and the taper of the inner hole of the tuyere small sleeve (5) match. 4. A blast furnace tuyere oven duct device according to claim 1 or 2, characterized in that: the two ends of the balance card (1) and the fixed card (2) are respectively connected to the horizontal section of the oven duct (3) welded together. 5. A blast furnace tuyere oven duct device according to claim 1, characterized in that: the angle α between the horizontal section oven duct (3) and the vertical section oven duct (4) is 110 degrees .