CN-224199415-U - Tuyere small sleeve and blast furnace tuyere device

CN224199415UCN 224199415 UCN224199415 UCN 224199415UCN-224199415-U

Abstract

The utility model discloses a tuyere small sleeve and a blast furnace tuyere device, wherein the tuyere small sleeve comprises a base body, a first type groove and a plurality of first type protection pieces, wherein a blowing channel is arranged on the base body, the blowing channel extends along the axial direction of the base body, the fluid output end of the blowing channel is the front end of the base body, the first type groove extends along the circumferential direction of the base body and is arranged close to the front end surface of the base body, the first type protrusion is arranged on the bottom surface of the first type protection piece and is matched with the first type groove, the first type protrusion is inserted into the first type groove, so that the first type protection piece is installed on the base body, and the plurality of first type protection pieces are sequentially close to each other and distributed along the circumferential direction of the base body so as to cover the outer side wall of the front end of the base body. The positioning of the first protection piece installation is realized through the adaptation of the convex blocks and the grooves, and the risk of falling failure caused by tilting deformation of the first protection piece when the first protection piece is heated can be avoided, so that a better protection effect on the matrix is realized.

Inventors

Zhao Donghuo
ZHANG ZEFEI
Hu Weihuan
HUANG JUNJIE
CAO HAIBO
LI ZHIPENG

Assignees

河北万丰冶金备件有限公司

Dates

Publication Date: 20260505
Application Date: 20250424

Claims (10)

1. A tuyere small sleeve, comprising: The device comprises a substrate, a first groove, a second groove, a first guide groove, a second guide groove and a second guide groove, wherein the substrate is provided with a blowing channel, the blowing channel extends along the axial direction of the substrate, and the fluid output end of the blowing channel is the front end of the substrate; The bottom surfaces of the first protection pieces are provided with first type protruding blocks, the first type protruding blocks are matched with the first type grooves, the first type protruding blocks are inserted into the first type grooves, the first protection pieces are arranged on the base body, the first protection pieces are sequentially close to each other and distributed along the circumference of the base body, and the outer side walls of the front ends of the base body are covered.
2. The tuyere small sleeve of claim 1, wherein a bead and a connecting member are provided on an outer side wall of the base, a first groove is provided between the bead and the connecting member, the connecting member is near a front end face of the base, the bead extends in a circumferential direction of the base, the connecting members are spaced apart in the circumferential direction of the base, The connecting piece is used for connecting the base body and the first protection piece, and the pressing strip is in contact with the rear end of the first protection piece.
3. The tuyere small sleeve according to claim 2, wherein a concave portion is arranged on one side, facing the first groove, of the pressing strip, the concave portion faces the outer side wall of the base body, a protruding portion is arranged at the rear end of the first protection piece, the protruding portion is matched with the concave portion, and the protruding portion is inserted into the concave portion, so that the first protection piece is prevented from being warped due to heat deformation.
4. The tuyere small sleeve as claimed in claim 2, wherein the first guard member is provided with a first through hole, the base is provided with a second through hole, the first through hole is matched with the second through hole, and the first through hole and the second through hole are internally provided with connecting members.
5. The tuyere small sleeve of claim 1, wherein the plurality of first protection pieces cover an outer side wall of the front end of the base near the top region, and the plurality of first protection pieces are arranged in a circular arc arch structure, wherein a central angle of the circular arc arch structure is 180 degrees or less.
6. The tuyere small sleeve of claim 5, wherein two blocking pieces are arranged on the outer side wall of the base body at intervals along the circumferential direction of the base body, a plurality of first protection pieces are arranged between the two blocking pieces, and the two blocking pieces are respectively close to the first protection piece and the last first protection piece.
7. The tuyere small sleeve of any of claims 1-6, further comprising: The second protection pieces are arranged on the front end face of the base body, each second protection piece is of a fan-shaped sheet structure, and the second protection pieces are sequentially close to each other and distributed along the circumferential direction of the base body so as to cover the front end face of the base body.
8. The tuyere small sleeve of claim 7, wherein the front end surface of the base is provided with second grooves which are distributed at intervals along the circumferential direction of the base, and the second grooves extend along the radial direction of the base and penetrate through the base; the second protection piece is provided with a second type protruding block which is matched with the second type groove, and the second type protruding block is inserted into the second type groove, so that the second protection piece is arranged on the front end face of the base body, wherein the second type groove is a dovetail groove.
9. The tuyere small sleeve of claim 8, wherein a plurality of the second protection pieces cover a top-near area of the front end face of the base, and the area covered by the plurality of the second protection pieces is a first fan-ring shape, and a central angle of the first fan-ring shape is 180 degrees or less.
10. A tuyere device for a blast furnace, characterized by comprising a tuyere small sleeve according to any of claims 1-9.

Description

Tuyere small sleeve and blast furnace tuyere device Technical Field The utility model relates to the technical field of blast furnaces, in particular to a tuyere small sleeve and a blast furnace tuyere device. Background Blast furnace smelting is a process for continuously producing liquid products (e.g., pig iron) in a blast furnace using coke, raw materials (e.g., iron ore) and fluxes (limestone, dolomite). In the smelting production of a blast furnace, coke, raw materials and flux are filled into the blast furnace through an inlet at the top of the blast furnace, preheated air is blown in from a tuyere small sleeve positioned at the lower part of the blast furnace along the periphery of the blast furnace or auxiliary fuel (coal dust, heavy oil and natural gas) is sprayed in, carbon in the coke or the auxiliary fuel can be combusted with oxygen in the blown air at high temperature to generate carbon monoxide and hydrogen, and oxygen in the raw materials can be removed in the ascending process of the blast furnace, so that a liquid product can be obtained. The tuyere small sleeve component is an important component for supplying air or spraying auxiliary fuel into the furnace in the smelting production of the blast furnace, and the front end of the tuyere small sleeve component needs to extend into the furnace and is in a high-temperature environment in the furnace, so that the working condition of the tuyere small sleeve component is very bad. In the actual use process, the tuyere small sleeve assembly is easy to be damaged by slag iron dripping and is easy to be damaged by furnace burden abrasion and high-temperature melting. The traditional protection means generally sets up potsherd protection etc. on wind gap cover subassembly, and the potsherd is heated the back and is out of shape and arouses the inefficacy that drops easily, leads to the protection effect relatively poor. Disclosure of utility model The utility model aims to provide a tuyere small sleeve and a blast furnace tuyere device. The utility model provides a tuyere small sleeve, which comprises a base body, a plurality of first protection pieces and a plurality of first protection pieces, wherein the base body is provided with a blowing channel, the blowing channel extends along the axial direction of the base body, the fluid output end of the blowing channel is the front end of the base body, the outer side wall of the base body is provided with a first groove, the first groove extends along the circumferential direction of the base body and is close to the front end surface of the base body, the bottom surface of the first protection piece is provided with a first projection, the first projection is matched with the first groove, the first projection is inserted into the first groove, so that the first protection pieces are mounted on the base body, and the first protection pieces are sequentially close to each other and are distributed along the circumferential direction of the base body so as to cover the outer side wall of the front end of the base body. Further, a pressing strip and connecting pieces are arranged on the outer side wall of the base body, a first groove is arranged between the pressing strip and the connecting pieces, the connecting pieces are close to the front end face of the base body, the pressing strip extends along the circumferential direction of the base body, the connecting pieces are distributed at intervals along the circumferential direction of the base body, the connecting pieces are used for connecting the base body and the first protection piece, and the pressing strip is in contact with the rear end of the first protection piece. Further, the depression bar is equipped with the depressed part towards one side of first kind recess, and the depressed part is towards the lateral wall of base member, the rear end of first guard piece is equipped with the protruding portion, protruding portion and depressed part looks adaptation, protruding portion inserts the depressed part to realize preventing that first guard piece from taking place the perk by thermal deformation. Further, a first through hole is formed in the first protection piece, a second through hole is formed in the base body, the first through hole is matched with the second through hole, and a connecting piece is arranged in the first through hole and the second through hole. Further, the plurality of first protection pieces cover the outer side wall of the front end of the base body, which is close to the top area, and the plurality of first protection pieces are arranged into an arc-shaped arch structure, wherein the central angle of the arc-shaped arch structure is less than or equal to 180 degrees. Further, two blocking pieces are arranged on the outer side wall of the base body at intervals along the circumferential direction of the base body, the plurality of first protection pieces are located between the two blocking pieces, and the two