Tuyere small sleeve capable of improving sealing performance

Abstract

The utility model relates to the technical field of blast furnace ironmaking, and discloses a tuyere small sleeve capable of improving sealing performance, which comprises a tuyere middle sleeve and a tuyere small sleeve, and is characterized in that a sealing mounting mechanism is fixedly mounted on the top end surface of the tuyere small sleeve, and a cooling mechanism is arranged in the tuyere small sleeve. When the tuyere small sleeve which is used for a long time needs to be replaced, the tuyere small sleeve is placed into the inner wall of a groove formed in the bottom end face of the tuyere middle sleeve, an external transmission shaft further extends into the tuyere small sleeve to drive an inner rack ring to rotate, and then the inner rack ring drives a second gear to rotate; the small tuyere sleeve drives the sliding block and the rack belt to slide on the inner walls of the first limiting block and the second limiting block, then the push plate and the fixing rod are pushed to move outwards, the graphite sealing ring can be pushed to expand outwards through the push plate and is in extrusion contact with the inner wall of the middle tuyere sleeve, the sealing performance and the installation speed of the graphite sealing ring and the middle tuyere sleeve are improved, and the service life and the practicability of the small tuyere sleeve are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to blast furnace ironmaking technical field, concretely is a kind of wind port small cover of improving sealing. BACKGROUND

[0002] Blast furnace tuyere is mainly applied in steel, metallurgy and chemical industry and other industries, is the key component to ensure the normal production of blast furnace, and high-temperature hot air and furnace bottom coke oxidation combustion CO2 are blown in through blast furnace tuyere, and CO2 is reduced in high-temperature ascending and the iron existing in the form of oxide is reduced. Blast furnace tuyere is usually installed in the furnace wall between the bosh and the hearth, and the front section is 500mm into the furnace, directly subjected to the thermal erosion of liquid slag iron and the wear of falling hot material, and is easy to damage, and frequent replacement of tuyere leads to blast furnace shutdown.

[0003] In the use of blast furnace tuyere small cover, the sealing and installation convenience of the connection with the tuyere inner sleeve need to be ensured, and the blast furnace tuyere small cover directly contacts with liquid slag iron in the furnace during use, which leads to serious aging and wear of the tuyere small cover, and the service life is short due to high temperature.

[0004] The traditional blast furnace tuyere small cover needs to be connected with the tuyere inner sleeve for use, and the sealing of the connection between the tuyere small cover and the remaining parts needs to be ensured during blast furnace ironmaking.

[0005] Therefore, it is necessary to provide a tuyere small cover for improving sealing. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a tuyere small cover for improving sealing to solve the problems in the above background technology.

[0007] To achieve the above object, the utility model provides the following technical scheme: a tuyere small cover for improving sealing, which comprises a tuyere inner sleeve and a tuyere small cover, the tuyere small cover is fixedly installed with a sealing installation mechanism on the top end face, and a cooling mechanism is arranged in the tuyere small cover.

[0008] The sealing installation mechanism comprises a mounting ring, the top end face of the mounting ring is fixedly connected with the top end face of the tuyere small cover, a rotating ring is slidably installed on the side surface of the mounting ring, an internal gear ring is fixedly installed on the inner wall of the rotating ring, a first limiting block is fixedly installed on the top end face of the tuyere small cover, and a sliding block is slidably installed on the inner wall of the first limiting block.

[0009] Preferably, the top end face of the tuyere small cover is fixedly installed with a second limiting block, the inner wall of the second limiting block is slidably connected with the side surface of the sliding block, and a gear strip is fixedly installed on the side surface of the sliding block.

[0010] Preferably, the tuyere small sleeve top end face is fixedly provided with a pin column, the pin column side is rotatably provided with a second gear through a bearing sleeve, the second gear top end face is fixedly provided with a limiting ring, and the limiting ring bottom end face is in pressure contact connection with the side face of the sliding block.

[0011] Preferably, the rack strip end face is fixedly provided with a push plate, the push plate top end face is fixedly provided with a fixed rod, the push plate side is fixedly provided with an arc-shaped groove, and the graphite sealing ring is press-fitted on the inner wall of the arc-shaped groove.

[0012] Preferably, the cooling mechanism comprises cooling coils arranged in the tuyere small sleeve and two connecting pipes arranged in the tuyere middle sleeve, after the tuyere small sleeve and the tuyere middle sleeve are assembled, the bottom ends of the two connecting pipes are respectively connected with the ports of the corresponding cooling coils, the water circulation cooling equipment is externally connected through the two connecting pipes, and the tuyere small sleeve is cooled.

[0013] Preferably, the tuyere small sleeve top end face is fixedly provided with a protective shell.

[0014] Preferably, the tuyere small sleeve top end face is in pressure contact connection with the tuyere middle sleeve bottom end face, the tuyere middle sleeve inner wall is fixedly provided with a bayonet, and the bayonet inner wall is clamped with the side face of the fixed rod.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] 1) the tuyere small sleeve with improved sealing performance, when the tuyere small sleeve needs to be replaced after long-time use, the tuyere small sleeve is placed in the groove inner wall formed in the tuyere middle sleeve bottom end face, the external transmission shaft is further inserted into the tuyere small sleeve to drive the internal rack ring to rotate, the internal rack ring drives the second gear to rotate, the sliding block and the rack strip slide in the first limiting block and the second limiting block, the push plate and the fixed rod move outward, the graphite sealing ring is expanded outward by the push plate, and is in pressure contact with the tuyere middle sleeve inner wall, the sealing performance and the installation speed of the two are improved, and the service life and the practicality of the tuyere small sleeve are improved.

[0017] 2) the tuyere small sleeve with improved sealing performance, when the tuyere small sleeve needs to be cooled after long-time use, the water circulation cooling equipment of the cooling mechanism is opened, the cooling liquid in the water circulation cooling equipment is transmitted to the cooling coils to cool, the heat contained in the tuyere small sleeve is taken away, the cooling operation of the tuyere small sleeve is realized, the temperature of the tuyere small sleeve is prevented from being too high, and the practicality of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a three-dimensional structure schematic view of the tuyere small sleeve with improved sealing performance in the utility model embodiment.

[0019] Figure 2 is a protective shell structure schematic view in the embodiment of the utility model;

[0020] Figure 3 is a cooling assembly structure schematic view in the embodiment of the utility model;

[0021] Figure 4 is a fixed rod structure schematic view in the embodiment of the utility model;

[0022] Figure 5 is a graphite sealing ring structure schematic view in the embodiment of the utility model;

[0023] Figure 6 is a sealing installation mechanism structure schematic view in the embodiment of the utility model;

[0024] Figure 7 is a tuyere small sleeve profile structure schematic view in the embodiment of the utility model.

[0025] In the drawing: 1, tuyere middle sleeve; 2, tuyere small sleeve; 302, connecting pipe; 303, cooling coil; 4, sealing installation mechanism; 401, installation ring; 402, rotating ring; 403, inner rack ring; 406, first limit block; 407, second limit block; 408, sliding block; 409, rack belt; 410, pin column; 411, second gear; 412, limit ring; 413, push plate; 414, fixed rod; 415, graphite sealing ring; 5, protective shell. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0027] Embodiment one

[0028] Combined with Figures 1-5The utility model provides a kind of improved sealing air port small sleeve, including air port middle sleeve 1 and air port small sleeve 2, air port small sleeve 2 top end face fixedly installed with sealing installation mechanism 4, air port small sleeve 2 side fixedly installed with cooling mechanism 3;Sealing installation mechanism 4 includes installation ring 401, installation ring 401 top end face is fixedly connected with the top end face of air port small sleeve 2, installation ring 401 side is slidably installed with rotating ring 402, rotating ring 402 inner wall is fixedly installed with internal gear ring 403, air port small sleeve 2 top end face is fixedly installed with first limit block 406, the inner wall of first limit block 406 is slidably installed with sliding block 408, air port small sleeve 2 top end face is fixedly installed with second limit block 407, the inner wall of second limit block 407 is slidably connected with the side of sliding block 408, the side of sliding block 408 is fixedly installed with rack belt 409, air port small sleeve 2 top end face is fixedly installed with pin column 410, pin column 410 side is rotatably installed with second gear 411 by bearing sleeve, second gear 411 top end face is fixedly installed with limit ring 412, limit ring 412 bottom end face is in contact with the side of sliding block 408, rack belt 409 end face is fixedly installed with push plate 413, push plate 413 top end face is fixedly installed with fixed rod 414, push plate 413 side is fixedly provided with arc slot, and arc slot inner wall is extruded and contacted with graphite seal ring 415;

[0029] Specifically, when the air port small sleeve 2 used for a long time needs to be replaced, the old air port small sleeve 2 is separated from the air port middle sleeve 1 and taken out, and then the new air port small sleeve 2 is placed in the groove inner wall formed at the bottom end face of the air port middle sleeve 1, the internal gear ring 403 is driven to rotate by the external transmission shaft inserted into the air port small sleeve 2, the rotating ring 402 is driven to rotate on the side of the installation ring 401, the second gear 411 is driven to rotate by the internal gear ring 403, the sliding block 408 and the rack belt 409 are slidably arranged in the inner wall of the first limit block 406 and the second limit block 407, the push plate 413 and the fixed rod 414 are driven to move outward, the fixed rod 414 is clamped with the bayonet, the graphite seal ring 415 is pushed outward by the push plate 413, and is extruded and contacted with the inner wall of the air port middle sleeve 1, so as to improve the sealing performance and the installation speed.

[0030] Embodiment two

[0031] Reference Figures 1-5 Further, the cooling mechanism includes a cooling coil 303 arranged in the air port small sleeve 2 and two connecting pipes 302 arranged in the air port middle sleeve 1, after the air port small sleeve 2 and the air port middle sleeve 1 are assembled, the bottom ends of the two connecting pipes 302 are respectively connected with the ports of the corresponding cooling coils 303, the air port small sleeve 2 is cooled by the water circulating cooling device connected with the two connecting pipes 302, the air port small sleeve 2 top end face is fixedly installed with a protective shell 5, the air port small sleeve 2 top end face is extruded and contacted with the bottom end face of the air port middle sleeve 1, the air port middle sleeve 1 inner wall is fixedly provided with a bayonet, and the bayonet inner wall is clamped with the side of the fixed rod 414.

[0032] Specifically, in use, when the tuyere small sleeve 2 is used for a long time, and needs to be cooled after high-temperature roasting, the water circulation cooling device of the cooling mechanism is opened, the cooled liquid in the interior is transmitted to the interior of the cooling coil 303 through the cooling assembly assembly 302 to perform cooling operation, the heat contained in the interior of the tuyere small sleeve 2 is taken away, and the cooling operation of the tuyere small sleeve 2 is realized.

[0033] The protective shell 5 plays a protection role and prolongs the service life of the tuyere small sleeve 2 in the embodiment, and the water circulation cooling device comprises a cooling assembly, a pump and a cooling assembly, and plays a role of cooling the cooled liquid with a rising temperature after circulation.

[0034] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A windbox damper comprising a windbox inner damper (1) and a windbox outer damper (2), characterized in that: The top end surface of the tuyere small sleeve (2) is fixedly provided with a sealing mounting mechanism (4), and the inside of the tuyere small sleeve (2) is provided with a cooling mechanism. The sealing mounting mechanism (4) comprises a mounting ring (401), the top end surface of the mounting ring (401) is fixedly connected with the top end surface of the tuyere small sleeve (2), a rotating ring (402) is slidably mounted on the side surface of the mounting ring (401), an internal gear ring (403) is fixedly mounted on the inner wall of the rotating ring (402), a first limiting block (406) is fixedly mounted on the top end surface of the tuyere small sleeve (2), and a sliding block (408) is slidably mounted on the inner wall of the first limiting block (406).

2. The improved sealing tuyere small cover according to claim 1, characterized in that: A second limiting block (407) is fixedly mounted on the top end surface of the tuyere small sleeve (2), the inner wall of the second limiting block (407) is slidably connected with the side surface of the sliding block (408), and a gear strip (409) is fixedly mounted on the side surface of the sliding block (408).

3. The improved sealable tuyere inner sleeve according to claim 2, wherein: A pin column (410) is fixedly mounted on the top end surface of the tuyere small sleeve (2), a second gear (411) is rotatably mounted on the side surface of the pin column (410) through a bearing sleeve, a limiting ring (412) is fixedly mounted on the top end surface of the second gear (411), and the bottom end surface of the limiting ring (412) is in pressure-releasing contact connection with the side surface of the sliding block (408).

4. The improved sealable tuyere inner sleeve according to claim 3, wherein: A push plate (413) is fixedly mounted on the end surface of the gear strip (409), a fixed rod (414) is fixedly mounted on the top end surface of the push plate (413), an arc-shaped groove is fixedly formed in the side surface of the push plate (413), and a graphite sealing ring (415) is press-contacted and mounted in the inner wall of the arc-shaped groove.

5. The improved windbox damper sleeve of claim 1, wherein: The cooling mechanism comprises cooling coils (303) arranged in the tuyere small sleeve (2) and two connecting pipes (302) arranged in the tuyere middle sleeve (1), after the tuyere small sleeve (2) and the tuyere middle sleeve (1) are assembled, the bottom ends of the two connecting pipes (302) are respectively connected with the ports of the corresponding cooling coils (303), and the tuyere small sleeve (2) is cooled by connecting the two connecting pipes (302) with a water circulation cooling device.

6. The improved sealing tuyere inner sleeve according to claim 1, wherein: The top end surface of the tuyere small sleeve (2) is fixedly provided with a protective shell (5).

7. The improved sealing tuyere inner sleeve according to claim 1, wherein: The top end surface of the tuyere small sleeve (2) is in press-contact connection with the bottom end surface of the tuyere middle sleeve (1), a bayonet is fixedly formed in the inner wall of the tuyere middle sleeve (1), and the side surface of the fixed rod (414) is clamped in the bayonet.

Images