阅读说明：本技术 一种双线形自适应新型风口中套强制密封装置及其加工工艺 (Double-line self-adaptive novel forced sealing device for tuyere middle sleeve and machining process thereof ) 是由 刘海龙 于 2021-08-31 设计创作，主要内容包括：本发明涉及一种双线形自适应新型风口中套强制密封装置及其加工工艺,其特征在于：由中套本体、凹槽、前密封面、后密封面、风口小套安装圆锥面、强制冷却水循环腔、冷却水入口、冷却水出水口和前端面构成。双线形自适应新型风口中套强制密封装置的加工工艺采用高纯度紫铜材料铸造成型制成双线形自适应新型风口中套本体,通过机械加工风口大套安装圆锥面上的凹槽、前密封面、后密封面及风口小套安装圆锥面、使其实现与风口大套及风口小套的配合精度。本发明解决了风口中套装置与大套锥型配合面之间不能完全密封,导致高炉内部带压煤气窜漏问题。本发明可使风口中套与大套之间形成线性自适应性强制密封不再窜漏带压煤气,确保高炉运行安全。(The invention relates to a double-line self-adaptive novel tuyere middle sleeve forced sealing device and a processing technology thereof, which are characterized in that: the air port small sleeve cooling device is composed of a middle sleeve body, a groove, a front sealing surface, a rear sealing surface, an air port small sleeve mounting conical surface, a forced cooling water circulation cavity, a cooling water inlet, a cooling water outlet and a front end surface. The machining process of the double-line-shaped self-adaptive novel tuyere middle sleeve forced sealing device adopts a high-purity red copper material to manufacture a double-line-shaped self-adaptive novel tuyere middle sleeve body by casting and molding, and the groove, the front sealing surface, the rear sealing surface and the tuyere small sleeve mounting conical surface on the tuyere large sleeve mounting conical surface are machined to realize the matching precision with the tuyere large sleeve and the tuyere small sleeve. The invention solves the problem of coal gas leakage caused by pressure in the blast furnace because the tuyere medium sleeve device and the large sleeve conical matching surface can not be completely sealed. The invention can form linear self-adaptive forced sealing between the tuyere middle sleeve and the large sleeve without leaking pressurized gas, thereby ensuring the safe operation of the blast furnace.)

1. The utility model provides a novel wind gap middle cover of double-line shape self-adaptation forces sealing device which characterized in that: is prepared from the following components: the air inlet large sleeve mounting conical surface comprises a middle sleeve body (1), a groove (2), a front sealing surface (3), a rear sealing surface (4), an air inlet small sleeve mounting conical surface (5), a forced cooling water circulation cavity (6), a cooling water inlet (7), a cooling water outlet (8) and a front end surface (9), wherein the middle sleeve body (1) is of a conical barrel structure, the groove (2) is arranged at the front end part of the middle sleeve body (1), the front sealing surface (3) and the rear sealing surface (4) are respectively formed on the groove body of the groove (2), and the air inlet large sleeve mounting conical surface is formed by the front sealing surface (3) and the rear sealing surface (4); the bottom in the middle sleeve body (1) is provided with a tuyere small sleeve mounting hole (5), the middle sleeve body (1) is internally provided with a forced cooling water circulation cavity (6), and the front end surface (9) is provided with a cooling water inlet (7) and a cooling water outlet (8).

2. A processing technology of a double-line self-adaptive novel tuyere middle sleeve forced sealing device is characterized by comprising the following steps: the following steps are adopted:

(1) the novel double-line self-adaptive tuyere medium sleeve body (1) is manufactured by casting and molding a high-purity red copper material, the shape of the novel double-line self-adaptive tuyere medium sleeve body is a hollow truncated cone, and a forced cooling water circulation cavity (6) is arranged in the medium sleeve body (1);

(2) cleaning the casting of the centering sleeve body (1), checking the casting quality to ensure that the thickness of each section of the casting is uniform, and ensuring no deformation and no leakage under the pressure of 16 kilograms per square centimeter through a compression test;

(3) the groove (2) on the mounting conical surface of the tuyere large sleeve, the front sealing surface (3), the rear sealing surface (4) and the mounting conical surface (5) of the tuyere small sleeve are machined, so that the matching precision of the tuyere large sleeve and the tuyere small sleeve is realized;

(4) machining a groove (2), a front sealing surface (3), a rear sealing surface (4) and a tuyere small sleeve mounting conical surface (5) at the rear part of the middle sleeve body (1) on a tuyere large sleeve mounting conical surface at the front part of the middle sleeve body (1); according to the design size: the length L = 60mm of the groove 2, the upper end surfaces of the front sealing surface (3) and the rear sealing surface (4) are processed into M = 5mm, the lower bottom surface of the front sealing surface is M = 10mm to form a trapezoid, and the depth L = 5mm of the groove 2;

(5) and a cooling water inlet (7) and a cooling water outlet (8) are machined and arranged on the front end surface (9) of the middle sleeve body (1).

Technical Field

The invention belongs to the technical field of blast furnace smelting and maintenance in the metallurgical industry, relates to a sealing structure for a blast furnace tuyere medium sleeve, solves the problems of leakage plugging of pressurized coal gas caused by poor sealing between a tuyere large sleeve and the medium sleeve and deformation, and the like, and particularly relates to a double-line-shaped self-adaptive novel tuyere medium sleeve forced sealing device and a processing technology thereof.

Background

At present, the smooth and reliable operation in an air supply device of blast furnace operation in the domestic metallurgical industry is more and more the key of the long production life of the blast furnace, a middle sleeve of a blast furnace tuyere is an important component of an air supply system and plays an especially important role, most of the faults of the tuyere middle sleeve device are caused by the fact that rigid materials are easily subjected to thermal deformation in a high-temperature environment, an abnormal gap is formed between the middle sleeve and a large sleeve conical matching surface, or the problems are influenced by foreign matters and cannot be completely sealed, so that the problems of gas leakage under pressure in the blast furnace, poor sealing performance and the like are caused, the cost is increased and the labor loss is caused by frequent replacement of equipment parts, the problems cannot be fundamentally solved, and the gas leakage under pressure causes great influence on safety production. In the prior art, soft sealing is formed by adding asbestos gaskets or smearing special sealing glue, but the production and operation procedures increase workload, but still have defects and flaws, the quality of sealing materials also influences the actual use effect to a certain extent, the long-term and stable sealing requirements cannot be met, and the sealing problem cannot be thoroughly solved for a long time.

Disclosure of Invention

The invention discloses a double-line self-adaptive novel tuyere middle sleeve forced sealing device and a processing technology thereof, and the contents of the forced sealing device are briefly described as follows:

novel wind gap middle cover of double-line shape self-adaptation forces sealing device, its characterized in that: is prepared from the following components: the middle sleeve body is of a conical barrel structure, the front end part of the middle sleeve body is provided with the groove, the front sealing surface and the rear sealing surface are respectively formed on the groove body of the groove, and the tuyere large sleeve mounting conical surface is formed by the front sealing surface and the rear sealing surface; the bottom in the middle sleeve body is provided with a tuyere small sleeve mounting hole, the middle sleeve body is internally provided with a forced cooling water circulation cavity, and the front end surface is provided with a cooling water inlet and a cooling water outlet.

The processing technology of the double-line self-adaptive novel tuyere middle sleeve forced sealing device comprises the following steps:

(1) the novel double-line self-adaptive tuyere medium sleeve body is manufactured by adopting a high-purity red copper material through casting and molding, the shape of the novel double-line self-adaptive tuyere medium sleeve body is a hollow truncated cone, and a forced cooling water circulation cavity is arranged in the medium sleeve body;

(2) cleaning the casting of the centering sleeve body, checking the casting quality to ensure that the thickness of each section of the casting is uniform, and ensuring no deformation and no leakage under the pressure of 16 kilograms per square centimeter through a compression test;

(3) machining a groove on the mounting conical surface of the tuyere large sleeve, a front sealing surface, a rear sealing surface and the mounting conical surface of the tuyere small sleeve to realize the matching precision with the tuyere large sleeve and the tuyere small sleeve;

(4) machining a groove, a front sealing surface and a rear sealing surface on the tuyere large sleeve mounting conical surface at the front part of the middle sleeve body and machining and forming a tuyere small sleeve mounting conical surface at the rear part of the middle sleeve body; according to the design size: the length L = 60mm of the groove, the upper end surfaces of the front sealing surface and the rear sealing surface are processed into M = 5mm, the lower bottom surface of the front sealing surface and the rear sealing surface is M = 10mm to form a trapezoid, and the depth h = 5mm of the groove;

(5) and the cooling water inlet and the cooling water outlet are arranged on the front end surface of the middle sleeve body.

The invention overcomes the defects, and aims to solve the problems that the rigid material of the tuyere medium sleeve device is easily subjected to thermal deformation in a high-temperature environment, an abnormal gap is formed between the medium sleeve and a large sleeve conical matching surface, or the tuyere medium sleeve device cannot be completely sealed due to the influence of foreign matters, so that pressurized gas in the blast furnace leaks, the sealing performance is poor, the sealing material cannot meet the long-term and stable sealing requirements, and the sealing problem cannot be thoroughly solved for a long time. The invention can form linear self-adaptive forced sealing between the tuyere medium sleeve and the large sleeve, thereby avoiding leaking pressurized gas, ensuring the safe operation of the blast furnace and realizing safe production.

Drawings

FIG. 1 is a schematic structural view of a double-line adaptive novel tuyere middle sleeve forced sealing device;

FIG. 2 is a side view of the double-line shape self-adaptive novel tuyere middle sleeve forced sealing device:

in the figure: the structure comprises a middle sleeve body 1, a groove 2, a front sealing surface 3, a rear sealing surface 4, a tuyere small sleeve mounting conical surface 5, a forced cooling water circulation cavity 6, a cooling water inlet 7, a cooling water outlet 8 and a front end surface 9.

Detailed Description

The forced sealing device for the double-line-shaped self-adaptive novel tuyere middle sleeve and the processing technology thereof are realized in the way, and the specific description is made by combining the embodiment.

Referring to fig. 1, the double-line self-adaptive novel tuyere middle sleeve forced sealing device is characterized in that: is prepared from the following components: the middle sleeve comprises a middle sleeve body 1, a groove 2, a front sealing surface 3, a rear sealing surface 4, a tuyere small sleeve mounting conical surface 5, a forced cooling water circulation cavity 6, a cooling water inlet 7, a cooling water outlet 8 and a front end surface 9, wherein the middle sleeve body 1 is of a conical barrel structure, the groove 2 is arranged at the front end part of the middle sleeve body 1, the front sealing surface 3 and the rear sealing surface 4 are respectively formed on the upper surface of a groove body of the groove 2, and a tuyere large sleeve mounting conical surface is formed by the front sealing surface 3 and the rear sealing surface 4; the bottom in the middle sleeve body 1 is provided with a tuyere small sleeve mounting hole 5, the middle sleeve body 1 is internally provided with a forced cooling water circulation cavity 6, and the front end surface 9 is provided with a cooling water inlet 7 and a cooling water outlet 8.

The invention relates to a processing technology of a double-line self-adaptive novel tuyere middle sleeve forced sealing device, which adopts the following steps:

(1) the novel double-line self-adaptive tuyere middle sleeve body 1 is made of high-purity red copper materials through casting forming, is in a hollow truncated cone shape, is internally provided with a forced cooling water circulation cavity 6 in the middle sleeve body 1, and has high heat conduction performance;

(2) cleaning the casting of the centering sleeve body 1, checking the casting quality to ensure that the thickness of each section of the casting is uniform, and ensuring no deformation and no leakage under the pressure of 16 kilograms per square centimeter through a compression test;

(3) the groove 2, the front sealing surface 3, the rear sealing surface 4 and the tuyere small sleeve mounting conical surface 5 on the tuyere large sleeve mounting conical surface are machined to realize the matching precision with the tuyere large sleeve and the tuyere small sleeve;

(4) machining a groove 2, a front sealing surface 3 and a rear sealing surface 4 on a tuyere large sleeve mounting conical surface at the front part of the centering sleeve body 1 and a tuyere small sleeve mounting conical surface 5 at the rear part of the centering sleeve body 1 to form; according to the design size: the length L = 60mm of the groove 2, the upper end surfaces of the front sealing surface 3 and the rear sealing surface 4 are processed to be M = 5mm, the lower bottom surface is M = 10mm, a trapezoid is formed, and the depth h = 5mm of the groove 2;

(5) and a cooling water inlet 7 and a cooling water outlet 8 are processed and arranged on the front end surface 9 of the middle sleeve body 1.

The smooth and reliable operation of the blast furnace in the blast device of the blast furnace operation in the metallurgical industry increasingly becomes the key of the long production life of the blast furnace, the middle sleeve of the blast furnace tuyere is an important component of the blast system and plays an important role, most of the faults of the tuyere middle sleeve device are caused by that rigid materials are easily subjected to thermal deformation in a high-temperature environment, an abnormal gap is formed between the middle sleeve and a large sleeve conical matching surface, or foreign matter influences exist, the complete sealing cannot be realized, and the fault is converted into a bilinear contact interface. Under the action of a pressing mechanism in an air supply device for running a blast furnace, the groove 2 on the mounting conical surface of the large tuyere sleeve on the front part of the novel double-line self-adaptive tuyere middle sleeve forced sealing device is in double-linear contact with the large tuyere sleeve to form a forced plastic sealing surface. The double-linear forced sealing is formed, and meanwhile, the guiding and positioning functions of the sleeve body are reserved. After working for a period of time, under normal working conditions, the tuyere large sleeve housing inevitably deforms slightly under high temperature and physical impact, at the moment, after the slight stress deformation of the tuyere large sleeve occurs, the double contact lines of the groove 2, the front sealing surface 3 and the rear sealing surface 4 compensate with the pressure adjustment of the deformation body and the tuyere large sleeve pressing mechanism, the front sealing surface 3 and the rear sealing surface 4 of the large sleeve mounting conical surface of the large sleeve forced sealing device of the large sleeve and the double-line-shaped self-adaptive novel tuyere middle sleeve forced sealing device are maintained to deform slightly in a plastic manner, the forced sealing effect is achieved by fitting the surface of the large sleeve cone, the leakage of coal gas with pressure in a furnace is blocked, the safe production of operation in the front of the furnace is ensured, the service life of the tuyere is prolonged, the labor intensity is reduced, and the operation risk and the operation cost are reduced.

According to the invention, through the novel double-line self-adaptive tuyere middle sleeve forced sealing device, the problems that the rigid material of the tuyere middle sleeve device is easily subjected to thermal deformation in a high-temperature environment, an abnormal clearance gap is formed between the middle sleeve and a large sleeve conical matching surface, or the tuyere middle sleeve device cannot be completely sealed due to the influence of foreign matters, so that pressurized gas blowby in a blast furnace is caused, the sealing performance is poor, the cost is increased due to frequent replacement of equipment parts, the labor intensity is high, and the pressurized gas blowby causes great influence on safety production are solved. The sealing material can not meet the long-term and stable sealing requirement, and the sealing problem can not be thoroughly solved for a long time. The invention can form linear self-adaptive forced sealing between the tuyere medium sleeve and the large sleeve, thereby avoiding leaking pressurized gas, ensuring the safe operation of the blast furnace and realizing safe production.