CN-224199414-U - Tuyere small sleeve and blast furnace tuyere device

CN224199414UCN 224199414 UCN224199414 UCN 224199414UCN-224199414-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, an assembling surface and a pillow block, 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 base body is provided with the assembling surface and the pillow block, the assembling surface is a connecting position of the tuyere medium sleeve on the base body, the pillow block is positioned at the rear end of the assembling surface and is lower than the assembling surface, the anti-sinking device comprises a positioning block, the positioning block is arranged at the pillow block, two opposite side surfaces of the positioning block are supporting surfaces, and the supporting surfaces are respectively contacted with the pillow block and the inner wall of the tuyere medium sleeve so as to realize the support of the base body. The pillow block is arranged at the pillow block, and the supporting surface of the positioning block is in interference fit with the inner walls of the pillow block and the tuyere medium sleeve respectively, so that the support of the substrate can be realized, and the front end of the substrate can be prevented from sinking and deforming due to impact of furnace burden descent.

Inventors

Zhao Donghuo
HUANG JUNJIE
CAO HAIBO
MA TENG
Jiao Xuchen
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 base body is provided with a blowing channel, the blowing channel extends along the axial direction of the base body, and the fluid output end of the blowing channel is the front end of the base body; the base body is provided with an assembling surface and a pillow block, the assembling surface is a joint part of the tuyere, which is sleeved on the base body, the pillow block is positioned at the rear end of the assembling surface, and the pillow block is lower than the assembling surface; the anti-sinking device comprises a positioning block, wherein the positioning block is arranged at a pillow block, two opposite side surfaces of the positioning block are supporting surfaces, and the supporting surfaces are respectively contacted with the pillow block and the inner wall of the tuyere medium sleeve so as to support a substrate.
2. The tuyere small sleeve as claimed in claim 1, wherein, The positioning block extends along the axial direction of the basal body, the cross section of the positioning block cut along the length direction of the positioning block is in a rectangular structure or a trapezoid structure, wherein, When the section shape of the positioning block is a trapezoid structure, the distance between the two supporting surfaces is gradually reduced from the rear end to the front end along the axial direction of the base body.
3. The tuyere small sleeve as claimed in claim 2, wherein a reserved space exists between the pillow block and the inner wall of the tuyere medium sleeve, and the distance between the two supporting surfaces of the positioning block is larger than the distance of the reserved space.
4. The tuyere small sleeve of claim 1, wherein the anti-sinking device further comprises a fixing frame, the fixing frame comprises a fixing plate and two baffle plates which are arranged side by side and at intervals, one side of the fixing plate is fixedly connected with the baffle plates, a positioning groove is formed in a space between the two baffle plates, and the fixing plate is connected with the rear end face of the base body; The positioning groove extends along the axial direction of the base body, the positioning groove is matched with the positioning block, two opposite side surfaces of the positioning block, which are intersected with the supporting surface, are guide surfaces, and the guide surfaces are respectively contacted with the two baffles so as to guide the positioning block.
5. The tuyere small sleeve of claim 4, wherein the fixing plate is provided with a through mounting hole, the rear end face of the base body is provided with a threaded hole, the mounting hole is matched with the threaded hole, and a threaded fastener is inserted into the mounting hole and screwed into the threaded hole so as to realize connection and fixation of the fixing frame and the base body.
6. The tuyere small sleeve of claim 4, wherein the height of the baffle is lower than that of the positioning block when the anti-sinking device is mounted on the base, the baffle is gradually inclined along the axial direction of the base, and the inclination slope of the baffle is matched with the inclination slope of the pillow block.
7. The tuyere small sleeve of claim 1, wherein the anti-sinking means is provided near a top region of the base, and the anti-sinking means is symmetrically provided with respect to an axis of the base.
8. The tuyere small sleeve of any of claims 1-7, wherein a cooling chamber is provided in the base body, and the cooling chamber is used for exchanging heat between the input cooling liquid and the heat of the base body; The cooling device comprises a cooling cavity, a cooling sleeve, an inlet, an outlet, a cooling cavity and a tuyere small sleeve, wherein the rear end face of the base is provided with the inlet and the outlet, the inlet is used for inputting cooling liquid, the outlet is used for outputting cooling liquid, the inlet and the outlet are communicated with the cooling cavity, the outlet is located in a top area close to the base, the inlet and the outlet are respectively located on two sides of an axis of the base, and therefore when the tuyere small sleeve is installed on a furnace wall of a smelting furnace, the height of the outlet from the ground is higher than that of the inlet from the ground.
9. The tuyere small sleeve of claim 8, wherein the anti-sinking devices are symmetrically arranged at two sides of the outlet, and the included angle of the circle centers of the two symmetrically arranged anti-sinking devices is 50-120 degrees.
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 solvents (limestone, dolomite). In the smelting production of a blast furnace, coke, raw materials and solvent 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 in a furnace or spraying auxiliary fuel in the smelting production of the blast furnace, in the actual use process, the body of the tuyere small sleeve component is easily sunk and deformed due to the impact of furnace burden descending, the air inlet angle is influenced, and even the air leakage caused by the air leakage of the body and the sleeve matching surface in the tuyere is caused, so that potential safety hazards are generated. The traditional protection means is to add a supporting rod at the lower end of the body, but the supporting rod is easy to fall down, so that the effect is poor, or the length of the matching surface of the body and the tuyere medium sleeve is prolonged, so that the holding of the tuyere medium sleeve and the tuyere small sleeve assembly is enhanced, but the processing difficulty of the overlong matching surface is high, and the sealing is possibly not tight. 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 positioning block and an anti-sinking device, 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 base body is provided with an assembling surface and a pillow block, the assembling surface is a connecting part of a tuyere medium sleeve arranged on the base body, the pillow block is positioned at the rear end of the assembling surface and is lower than the assembling surface, the positioning block is arranged at the pillow block, the two opposite side surfaces of the positioning block are supporting surfaces, and the supporting surfaces are respectively contacted with the pillow block and the inner wall of the tuyere medium sleeve so as to support the base body. Further, the positioning block extends along the axial direction of the base body, the cross section of the positioning block cut along the length direction of the positioning block is of a rectangular structure or a trapezoid structure, and when the cross section of the positioning block is of the trapezoid structure, the distance between the two supporting surfaces is gradually reduced from the rear end to the front end along the axial direction of the base body. Further, a reserved space is reserved between the pillow block and the inner wall of the tuyere medium sleeve, and the distance between the two supporting surfaces of the positioning block is larger than the distance of the reserved space. Further, the anti-sinking device further comprises a fixing frame, the fixing frame comprises a fixing plate and two baffle plates which are arranged side by side and at intervals, one side of the fixing plate is fixedly connected with the baffle plates, a positioning groove is formed in a space between the two baffle plates, the fixing plate is connected with the rear end face of the base body, the positioning groove extends along the axial direction of the base body, the positioning groove is matched with the positioning block, two opposite side faces of the positioning block, which are intersected with the supporting surface, are guide surfaces, and the guide surfaces are respectively contacted with the two baffle plates so as to guide the positioning block. Further, a through mounting hole is formed in the fixing plate, a threaded hole is formed in the rear end face of the base body, the mounting hole is matched with the threaded hole, and a threaded fastener is inserted into the mounting hole and screwed into the threaded hole so as to achieve connection and fixation of the fixing frame and the base body. Further, when the anti-sinking device is mounted on the base body,