CN213624223U - Differential pressure type soft sealing air port structure - Google Patents

Abstract

The utility model belongs to the technical field of iron-making blast furnace equipment, and relates to a differential pressure type soft sealing tuyere structure, which comprises a tuyere large sleeve, a tuyere middle sleeve and a tuyere small sleeve, wherein the joints of the tuyere large sleeve and the tuyere middle sleeve, and the tuyere middle sleeve and the tuyere small sleeve are respectively provided with a sealing surface, and the sealing surface is provided with a sealing element close to the edge of the inner side of a furnace; the sealing element is pressed and stuck on the outer walls of the tuyere medium sleeve and the tuyere small sleeve under the action of high pressure in the furnace. The utility model has the advantages of good sealing performance and convenient installation and maintenance.

Description

Differential pressure type soft sealing air port structure

Technical Field

The utility model belongs to the technical field of iron-making blast furnace equipment, a soft sealed wind gap structure of differential pressure formula is related to.

Background

The blast furnace is a closed high-temperature high-pressure smelting container, hot air is blown into the blast furnace by an air supply device through an air port sleeve arranged on a furnace shell, and high-temperature high-pressure coal gas flow generated by coke combustion reduces iron ore to produce hot molten iron. The tuyere sleeve generally comprises a large sleeve, a middle sleeve and a small sleeve, and is necessary equipment for blast furnace smelting. The tuyere sleeve forms a blast furnace air receiving channel and plays a role in cooling a refractory brick lining nearby the tuyere sleeve and sealing high-temperature and high-pressure coal gas in the blast furnace. Generally, cast steel or cast copper is cast integrally, a water flow channel is cast in the cast steel or cast copper, and water is used for cooling. In order to seal high-pressure coal gas, the traditional tuyere big sleeve, the traditional tuyere middle sleeve and the traditional tuyere small sleeve are connected in a hard mode, a cone is machined between the tuyere small sleeve and the tuyere middle sleeve through the front end of the tuyere middle sleeve and the rear end of the tuyere small sleeve, and a jack and other equipment are adopted to jack tightly during installation, so that operation is very inconvenient.

In the traditional design, the tuyere large sleeve and the middle sleeve are hard sealed by the metal of the conical surfaces of cast steel and cast copper, the tuyere small sleeve and the middle sleeve are hard sealed by the metal of cast copper and cast copper, the conical sealing surface is influenced by the processing precision, the sealing performance of the tuyere small sleeve and the middle sleeve is general, and the tuyere small sleeve and the middle sleeve are influenced by expansion and contraction of heat and cold under the condition of high temperature and high pressure for a long time, the sealing surface is easy to loosen, the sealing effect is increasingly poor, and the production safety is seriously influenced by the coal gas leakage of the.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at solving the poor problem of wind gap cover leakproofness, provide a differential pressure formula soft sealing wind gap structure.

In order to achieve the above purpose, the utility model provides a following technical scheme: a differential pressure type soft sealing tuyere structure comprises a tuyere large sleeve, a tuyere middle sleeve and a tuyere small sleeve, wherein sealing surfaces are arranged at the joints of the tuyere large sleeve and the tuyere middle sleeve and the joints of the tuyere middle sleeve and the tuyere small sleeve, and sealing elements are arranged on the edges of the sealing surfaces close to the inner side of a furnace; the sealing element is pressed and stuck on the outer walls of the tuyere medium sleeve and the tuyere small sleeve under the action of high pressure in the furnace.

The principle of the basic scheme is as follows: the furnace is filled with high-pressure gas, the air pressure in the tuyere sleeve is lower than that in the furnace, when the sealing surface is loosened to a certain extent, the air in the tuyere sleeve is communicated with the high-pressure gas in the furnace, and pressure difference is formed on two sides of the sealing element, so that the sealing element is tightly pressed towards the outer wall of the tuyere middle sleeve or the tuyere small sleeve, and a gap generated by loosening of the sealing surface is filled, and the tuyere sleeve is kept sealed all the time.

The beneficial effect of this basic scheme lies in: the sealing surface edge is additionally provided with a sealing element for soft sealing, when the sealing surface is loosened and leaks air, pressure difference is formed on two sides of the sealing element by utilizing high-pressure air in the tuyere sleeve, so that the sealing element is tightly attached to the tuyere sleeve, a gap generated by loosening of the sealing surface is filled, and the problem of poor sealing performance is solved.

The locking device comprises a middle sleeve ejector rod, a small sleeve ejector rod and a mounting seat; one end of the middle sleeve ejector rod is connected with the mounting seat through threads, and the end face of the other end of the middle sleeve ejector rod is in contact with the end face of the tuyere middle sleeve; the small sleeve ejector rod is arranged between the mounting seat and the tuyere small sleeve, and two end faces of the small sleeve ejector rod are respectively contacted with the mounting seat and the end face of the tuyere small sleeve; the mount pad is located the wind gap and is sheathe in greatly, beneficial effect: the tuyere middle sleeve and the tuyere small sleeve are locked, and the locking device is simple in structure and beneficial to implementation.

Further, well cover ejector pin and little cover ejector pin all include adjusting nut, locate the depression bar at adjusting nut both ends respectively, through threaded connection, beneficial effect between adjusting nut and the depression bar: the length of the ejector rod is changed through the adjusting nut, so that the tightness degree is adjusted, and meanwhile, the mounting and dismounting are facilitated.

Further, the toper is personally submitted to the sealing, and it has the seal groove to open on the sealed face, and the sealing member nestification is in the seal groove, beneficial effect: the conical sealing surface can improve the sealing performance, and the sealing groove is favorable for mounting the sealing element.

Further, the sealing member is V-shaped or L-shaped, and has the advantages that: the air inlet sleeve has good fitting property, is adaptive to the air inlet sleeve structure and is beneficial to sealing.

Further, the sealing element is made of elastic refractory materials, and has the advantages that: is suitable for high temperature and high pressure conditions, and prolongs the service life.

The beneficial effects of the utility model reside in that: on the basis of conical surface sealing, a V-shaped or L-shaped sealing element made of elastic refractory materials is used for soft sealing, and pressure difference is formed on two sides of the sealing element by utilizing high-pressure gas in a furnace, so that the sealing element is tightly attached to the outer wall of the tuyere sleeve, a gap generated by loosening of a sealing surface is filled, and the problem of poor conical surface sealing performance is solved; the locking device is arranged on the tuyere large sleeve, the tuyere middle sleeve and the tuyere small sleeve are locked and fixed, the influence of expansion with heat and contraction with cold on the sealing effect is avoided, and meanwhile, the locking device is arranged on the tuyere large sleeve, so that the structure is simple, and the installation and the maintenance are convenient.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a clear understanding of the objects, aspects and advantages of the invention, reference will now be made in detail to the preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

reference numerals: 1-tuyere large sleeve; 2-tuyere medium sleeve; 3-tuyere small sleeve; 4-a locking device; 5-sealing surface; 6-a seal; 41-middle sleeve ejector rod; 42-a small set of ejector rods; 43-a mounting seat; 411-adjusting nut; 412-strut.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

Please refer to fig. 1-2, which are a differential pressure type soft sealing tuyere structure, comprising a tuyere large sleeve 1, a tuyere middle sleeve 2, and a tuyere small sleeve 3, wherein the tuyere large sleeve 1 is mounted on a furnace body through a flange, the tuyere large sleeve 1 is sleeved outside the tuyere middle sleeve 2, the tuyere middle sleeve 2 is sleeved outside the tuyere small sleeve 3, and sealing surfaces 5 are arranged at the joints of the tuyere large sleeve 1 and the tuyere middle sleeve 2, and the tuyere middle sleeve 2 and the tuyere small sleeve 3; the sealing surface 5 is conical, a sealing groove is formed in the edge, close to the inner side of the furnace, of the sealing surface 5, a sealing element 6 is nested in the sealing groove, the sealing element 6 can be V-shaped or L-shaped, the L-shaped sealing element 6 is adopted in the embodiment, the two sealing elements 6 are respectively tightly pressed with the outer walls of the tuyere middle sleeve 2 and the tuyere small sleeve 3, and the sealing element 6 is made of high-temperature-resistant silica gel.

In this embodiment, a locking device 4 is further installed, and the locking device 4 includes a middle set of ejector rods 41, a small set of ejector rods 42, and a mounting base 43; one end of the middle sleeve ejector rod 41 is connected with the mounting seat 43 through threads, and the end face of the other end of the middle sleeve ejector rod is contacted with the end face of the tuyere middle sleeve 2; the small sleeve ejector rod 42 is arranged between the mounting seat 43 and the tuyere small sleeve 3, and two end faces of the small sleeve ejector rod are respectively contacted with the mounting seat 43 and the end face of the tuyere small sleeve 3; the mounting seat 43 is mounted on the tuyere large sleeve 1, the middle sleeve ejector rod 41 comprises an adjusting nut 411 and a pressure rod 412 which are respectively connected to two ends of the adjusting nut 411, the adjusting nut 411 and the pressure rod 412 are in threaded connection, and the middle sleeve ejector rod 41 is extended or shortened through the adjusting nut 411; the adjusting mode of the small set of ejector rods 42 is different from that of the middle set of ejector rods 41 in that the two end surfaces of the small set of ejector rods 42 are respectively contacted with the mounting base 43 and the end surface of the tuyere small sleeve 3.

When the sealing surface 5 is loosened and air leakage is generated, the sealing element 6 is pressed and tightly attached to the tuyere medium sleeve 2 or the tuyere small sleeve 3 due to the pressure difference between two sides of the sealing element 6, so that a gap generated by the loosening of the sealing surface 5 is filled, and the sealing performance of the tuyere sleeve is ensured.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.

Claims (6)

1. The utility model provides a differential pressure formula soft seal wind gap structure, includes that wind gap is big overlaps, wind gap well cover, the tuyere is little overlaps, its characterized in that: sealing surfaces are arranged at the joints of the tuyere large sleeve and the tuyere middle sleeve and the tuyere small sleeve, and sealing elements are arranged on the edges of the sealing surfaces close to the inner side of the furnace; the sealing element is pressed and stuck on the outer walls of the tuyere medium sleeve and the tuyere small sleeve under the action of high pressure in the furnace.

2. The differential pressure type soft sealing tuyere structure of claim 1, wherein: the locking device comprises a middle sleeve ejector rod, a small sleeve ejector rod and a mounting seat; one end of the middle sleeve ejector rod is connected with the mounting seat through threads, and the end face of the other end of the middle sleeve ejector rod is in contact with the end face of the tuyere middle sleeve; the small sleeve ejector rod is arranged between the mounting seat and the tuyere small sleeve, and two end faces of the small sleeve ejector rod are respectively contacted with the mounting seat and the end face of the tuyere small sleeve; the mounting seat is detachably connected with the tuyere large sleeve.

3. The differential pressure type soft sealing tuyere structure of claim 2, wherein: the middle sleeve ejector rod and the small sleeve ejector rod respectively comprise adjusting nuts and pressure rods arranged at two ends of the adjusting nuts, and the adjusting nuts are connected with the pressure rods through threads.

4. The differential pressure type soft sealing tuyere structure of claim 1, wherein: the sealing surface is conical, a sealing groove is formed in the sealing surface, and the sealing element is nested in the sealing groove.

5. The differential pressure type soft sealing tuyere structure of claim 1, wherein: the sealing element is V-shaped or L-shaped.

6. The differential pressure type soft sealing tuyere structure of claim 1, wherein: the seal is made of a resilient refractory material.

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