阅读说明：本技术 一种快换水口组合结构的制备工艺及其加工模具 (Preparation process of quick-change water gap combined structure and machining die thereof ) 是由 杨荣财 张初华 陈建平 杨子元 宋国翔 张康尔 于 2021-07-14 设计创作，主要内容包括：本发明公开了一种快换水口组合结构的制备工艺,涉及包水口技术领域；该快换水口组合结构包括上水口,上水口的下方设置有下水口,上水口与下水口的内部均设置有导水管,两个导水管的连接处设置有导水装置,上水口与下水口的两端均开有限位槽；所述导水装置包括设置在上水口底部的上导水块,所述下水口的顶部设置有下导水块,所述上导水块与下导水块的内壁均呈弧形设置,所述上导水块的开口端直径小于下导水块的开口端直径；所述上水口和下水口的制备原材料包括碳结合轻质多孔氧化物,所述碳结合轻质多孔氧化物的原料包括氧化铝空心球、六铝酸钙和石墨本发明可以使上水口与下水口进行较好的导流,防止钢水发生泄漏。(The invention discloses a preparation process of a quick-change nozzle combined structure, and relates to the technical field of ladle nozzles; the quick-change water gap combined structure comprises an upper water gap, a lower water gap is arranged below the upper water gap, water guide pipes are arranged inside the upper water gap and the lower water gap, a water guide device is arranged at the joint of the two water guide pipes, and limiting grooves are formed in the two ends of the upper water gap and the lower water gap; the water guide device comprises an upper water guide block arranged at the bottom of the upper water gap, a lower water guide block is arranged at the top of the lower water gap, the inner walls of the upper water guide block and the lower water guide block are both arranged in an arc shape, and the diameter of the opening end of the upper water guide block is smaller than that of the opening end of the lower water guide block; the raw materials for preparing the upper nozzle and the lower nozzle comprise carbon-bonded light porous oxide, and the raw materials for the carbon-bonded light porous oxide comprise alumina hollow spheres, calcium hexaluminate and graphite.)

1. A preparation process of a quick-change nozzle combined structure is characterized by comprising the following steps:

the water distributor comprises an upper water gap (1), a lower water gap (2) is arranged below the upper water gap (1), water guide pipes (3) are arranged inside the upper water gap (1) and the lower water gap (2), a water guide device (4) is arranged at the joint of the two water guide pipes (3), and limiting grooves (5) are formed in two ends of the upper water gap (1) and the lower water gap (2);

the water guide device (4) comprises an upper water guide block (41) arranged at the bottom of the upper water gap (1), a lower water guide block (42) is arranged at the top of the lower water gap (2), the inner walls of the upper water guide block (41) and the lower water guide block (42) are both arranged in an arc shape, and the diameter of the opening end of the upper water guide block (41) is smaller than that of the opening end of the lower water guide block (42);

the preparation raw materials of the upper nozzle and the lower nozzle comprise carbon-bonded lightweight porous oxides, and the raw materials of the carbon-bonded lightweight porous oxides comprise alumina hollow spheres, calcium hexaluminate and graphite.

2. The preparation process of the quick-change nozzle combination structure according to claim 1, wherein the preparation process comprises the following steps: the preparation raw materials of the upper nozzle and the lower nozzle also comprise an acidic substance, metal powder and an additive.

3. The preparation process of the quick-change nozzle combination structure according to claim 1, wherein the preparation process comprises the following steps: the acidic substance comprises silicon dioxide or borax; the metal powder comprises aluminum powder or magnesium powder, and the additive comprises bentonite, polyvinyl alcohol and methyl silicone oil.

4. The preparation process of the quick-change nozzle combination structure according to claim 1, wherein the preparation process comprises the following steps: a fixing device (6) is arranged between the upper nozzle (1) and the lower nozzle (2), the fixing device (6) comprises a fixed seat (61) arranged in a limiting groove (5), slide rails (62) are symmetrically arranged on the fixed seat (61), slide blocks (63) are arranged in the slide rails (62), a screw rod (64) is arranged between the slide blocks (63) and the fixed seat (61), the screw rod (64) is in threaded connection with the slide blocks (63), a first helical gear (65) is arranged at one end, close to the two screw rods (64), of each screw rod (64), a second helical gear (66) is arranged on the fixed seat (61), the second helical gear (66) is in meshed connection with the first helical gear (65), a rotating rod (67) is arranged between the second helical gear (66) and the fixed seat (61), and a forward and reverse rotation motor (68) is arranged at one side, far away from the fixed seat (61), of the fixed seat (61), the output end of the positive and negative rotation motor (68) is fixedly connected with the rotating rod (67).

5. The preparation process of the quick-change nozzle combination structure according to claim 2, wherein the preparation process comprises the following steps: one side that slider (63) are located and are close to fixing base (61) all is provided with cushion (7), cushion (7) are to slider (63) laminating water inlet (1) and the one end of lower mouth of a river (2) wrap up completely.

6. The preparation process of the quick-change nozzle combination structure according to claim 2, wherein the preparation process comprises the following steps: the thread directions of the two screw rods (64) are opposite, and the screw rods (64) are both positioned on the fixed seat (61) and are in limited rotary connection.

7. A quick-change nozzle assembly structure v according to claim 2, wherein: the water guide pipe (3) is connected with the upper water guide block (41) and the lower water guide block (42) in a pouring mode, and the connecting surfaces of the upper water gap (1) and the lower water gap (2) are arranged smoothly.

8. The preparation process of the quick-change nozzle combination structure according to claim 1, wherein the preparation process comprises the following steps: the outer side of the water guide pipe (3) protrudes out of the side surface of the upper water gap (1) or the lower water gap (2), and a pipeline is connected to the water guide pipe (3).

9. The processing mold used in the preparation process of the quick-change nozzle assembly structure according to any one of claims 1 to 8, wherein: including last mouth of a river (1) and lower mouth of a river (2), its characterized in that: an upper nozzle zirconium core (11) is arranged in the upper nozzle (1), a lower nozzle zirconium core (21) is arranged in the lower nozzle (2), the upper nozzle zirconium core (11) and the lower nozzle zirconium core (21) are positioned on the same central line, an upper nozzle boss (12) is arranged on the upper nozzle (1), a lower nozzle boss (22) is arranged on the lower nozzle (2), and the upper nozzle (1) and the lower nozzle (2) are tightly connected with the lower nozzle boss (22) through the upper nozzle boss (12);

the mounting is located between mouth of a river boss (12) and lower mouth of a river boss (22), establishes mount pad (30) on lower mouth of a river (2) including the cover, the both sides of mount pad (30) all are provided with a pair of supporting leg (40), and are a pair of install lower carriage (50) between supporting leg (40), electric putter (60), each are all installed along length direction's both sides in lower carriage (50) equal coaxial cover is equipped with spring (90), and is a pair of on the activity of electric putter (60) is served be connected with upper bracket (70) between electric putter (60).

10. The processing mold used in the preparation process of the quick-change nozzle assembly structure according to claim 1, wherein: the lower nozzle boss (22) is provided with a lower nozzle bowl opening (221) communicated with the lower nozzle zirconium core (21), and a circular ring (23) made of zirconia is embedded in the lower nozzle bowl opening (221).

Technical Field

The invention relates to the technical field of ladle nozzles, in particular to a quick-change nozzle combined structure, a preparation process and a processing die thereof.

Background

The zirconium core wrapped water gap is a structure used for guiding molten steel, and the invention with the publication number of CN103567428A discloses a water gap of a steel continuous casting tundish, which comprises an upper water gap consisting of an upper water gap body and an upper water gap zirconium core, and a lower water gap consisting of a lower water gap body and a truncated cone-shaped lower water gap zirconium core, wherein the holes of the upper water gap zirconium core and the lower water gap zirconium core coaxially form a molten steel channel, the upper water gap and the lower water gap are in sealed contact, and the zirconium core is made of a zirconium oxide material. The structure increases the contact area between the lower nozzle and the upper nozzle zirconium core, has stronger molten steel scouring resistance, lags the damage of the joint part between the lower nozzle zirconium core and the upper nozzle zirconium core behind the damage of the hole part of the lower nozzle zirconium core, prolongs the service life of the lower nozzle, and simultaneously avoids the accidents of steel clamping, even steel penetration and the like.

However, the shroud nozzle of the above-described technology is formed by combining the upper nozzle and the lower nozzle, and a zirconium core is mostly used as a material for improving the service life of the shroud nozzle.

Disclosure of Invention

Aiming at the problems in the prior art, one of the purposes of the invention is to provide a preparation process of a quick-change nozzle combined structure, which can reasonably set the positions of an upper nozzle and a lower nozzle, is convenient for flow guiding and prevents molten steel from leaking.

The second purpose of the present invention is to provide a processing mold for the above quick-change nozzle assembly structure.

In order to solve the problems, the invention adopts the following technical scheme:

the first purpose of the invention is realized by the following scheme:

a preparation process of a quick-change nozzle combined structure comprises the following steps:

the water distributor comprises an upper water gap, a lower water gap, water guide pipes, a water guide device and limiting grooves, wherein the lower water gap is arranged below the upper water gap;

the water guide device comprises an upper water guide block arranged at the bottom of the upper water gap, a lower water guide block is arranged at the top of the lower water gap, the inner walls of the upper water guide block and the lower water guide block are both arranged in an arc shape, and the diameter of the opening end of the upper water guide block is smaller than that of the opening end of the lower water guide block;

the preparation raw materials of the upper nozzle and the lower nozzle comprise carbon-bonded lightweight porous oxides, and the raw materials of the carbon-bonded lightweight porous oxides comprise alumina hollow spheres, calcium hexaluminate and graphite.

Preferably, the raw materials for preparing the upper nozzle and the lower nozzle further comprise an acidic substance, metal powder and an additive.

More preferably, the acidic substance comprises silica or borax; the metal powder comprises aluminum powder or magnesium powder, and the additive comprises bentonite, polyvinyl alcohol and methyl silicone oil.

As a preferred scheme of the invention, a fixing device is arranged between the upper nozzle and the lower nozzle, the fixing device comprises a fixed seat arranged in a limiting groove, slide rails are symmetrically arranged on the fixed seat, slide blocks are arranged in the slide rails, screw rods are arranged between the slide blocks and the fixed seat, the screw rods are in threaded connection with the slide blocks, first helical gears are arranged at the ends, close to the two screw rods, of the two screw rods, a second helical gear is arranged on the fixed seat, the second helical gear is in meshed connection with the first helical gear, a rotating rod is arranged between the second helical gear and the fixed seat, a forward and reverse rotating motor is arranged at one side, far away from the fixed seat, of the fixed seat, and the output end of the forward and reverse rotating motor is fixedly connected with the rotating rod; the invention can fix the positions of the upper water gap and the lower water gap and prevent water from leaking.

As a preferable scheme of the invention, elastic pads are arranged on one sides of the sliding blocks close to the fixed seat, and the elastic pads completely wrap one ends of the sliding blocks, which are attached to the upper water gap and the lower water gap.

As a preferable scheme of the invention, the thread directions of the two screws are opposite, and the screws are both positioned on the fixed seat and are in limited rotary connection.

As a preferred scheme of the invention, the water guide pipe is connected with the upper water guide block and the lower water guide block in a pouring manner, and the connecting surfaces of the upper water gap and the lower water gap are smoothly arranged.

In a preferred embodiment of the present invention, the outer side of the water conduit protrudes from the side surface of the water supply port or the water discharge port, and the water conduit is connected to a pipeline.

The second purpose of the invention is realized by the following scheme:

a water gap blank processing and forming die comprises an upper water gap and a lower water gap, wherein an upper water gap zirconium core is arranged in the upper water gap, a lower water gap zirconium core is arranged in the lower water gap, the upper water gap zirconium core and the lower water gap zirconium core are positioned on the same central line, an upper water gap boss is arranged on the upper water gap, a lower water gap boss is arranged on the lower water gap, the upper water gap and the lower water gap are tightly connected together through the upper water gap boss and the lower water gap boss, molten steel flows in from the upper water gap zirconium core during use, a lower water gap bowl opening communicated with the lower water gap zirconium core is formed in the lower water gap boss, a circular ring made of zirconia is embedded in the lower water gap bowl opening, and the inner diameter of the lower water gap bowl opening is larger than that of the bottom of the upper water gap zirconium core, so that the flow rate of the molten steel is slowed down, the molten steel scouring resistance is improved, and the molten steel is prevented from seeping out from a combination position;

the mounting is located between mouth of a river boss and the lower mouth of a river boss, establishes the mount pad on the lower mouth of a river including the cover, the both sides of mount pad all are provided with a pair of supporting leg, and are a pair of install the lower carriage between the supporting leg, the lower carriage is installed along length direction's both sides and is all installed electric putter, each equal coaxial cover is equipped with the spring on electric putter's the activity end, and is a pair of be connected with the upper bracket between the electric putter.

Preferably, the lower nozzle boss is provided with a lower nozzle bowl mouth communicated with the lower nozzle zirconium core, and a circular ring made of zirconium oxide is embedded in the lower nozzle bowl mouth.

Preferably, the zirconium core of the upper nozzle is in a truncated cone shape, and the diameter of the upper end opening of the zirconium core of the upper nozzle is larger than that of the lower end opening.

Preferably, the contact surface between the upper support and the upper nozzle boss and the contact surface between the lower support and the lower nozzle boss are provided with cushion pads made of polytetrafluoroethylene.

Preferably, the mounting seat comprises a pair of arc frames hinged together through a hinge shaft, and one ends of the pair of arc frames far away from the hinge shaft are opened and closed through fastening bolts.

Preferably, the outer side surface of the upper nozzle boss is provided with a ring groove, the outer side surface of the lower nozzle boss is provided with an annular bulge, and the ring groove and the annular bulge are mutually matched and clamped.

Compared with the prior art, the invention has the advantages that:

1. in the invention, the positions of the upper water gap and the lower water gap which are prepared by adopting specific raw materials are reasonably set, and the structure of the water guide device is specific, so that the leakage of molten steel can be prevented; the output end of a forward and reverse rotating motor drives the rotating rod to rotate, the rotating rod drives the second bevel gear to rotate, the second bevel gear is meshed with the first bevel gear to enable the second bevel gear to drive the two first bevel gears to synchronously rotate, the two first bevel gears drive the two screw rods to synchronously rotate, the thread directions of the two screw rods are opposite, the screw rods can drive the two sliding blocks to synchronously move in opposite directions, and the upper water gap and the lower water gap can be further fixed in position through the sliding blocks, so that water is prevented from leaking;

2. when the invention is used, molten steel flows in from the upper nozzle zirconium core, and because the lower nozzle boss is provided with the lower nozzle bowl mouth communicated with the lower nozzle zirconium core, the lower nozzle bowl mouth is embedded with a circular ring made of zirconia, and the inner diameter of the lower nozzle bowl mouth is larger than that of the bottom of the upper nozzle zirconium core, the flow speed of the molten steel is slowed down, the molten steel scouring resistance is improved, and the molten steel is prevented from seeping out from a joint.

3. According to the invention, the upper nozzle is placed on the lower nozzle, so that the zirconium core of the upper nozzle and the zirconium core of the lower nozzle are positioned on the same central line, the lower bracket is abutted against the boss of the lower nozzle, the pair of electric push rods are started, and the pair of electric push rods drive the upper bracket to press downwards to press the boss of the upper nozzle, so that the molten steel is prevented from being infiltrated outwards.

Drawings

Fig. 1 is a schematic structural view of a quick-change nozzle assembly structure according to the present invention;

FIG. 2 is a schematic view of the internal cross-sectional structure of the upper nozzle and the lower nozzle of the quick-change nozzle of the present invention;

FIG. 3 is a schematic structural view of a water guide device of the quick-change nozzle of the present invention;

fig. 4 is a schematic structural view of a fixing device of the quick-change nozzle of the invention;

fig. 5 is an enlarged schematic view of a portion a of the quick-change nozzle of the present invention shown in fig. 4.

Fig. 6 is a schematic sectional structural view of the quick-change nozzle blank machining and forming die of the invention;

fig. 7 is a schematic structural view of the quick-change nozzle blank machining and forming die of the invention;

fig. 8 is a schematic structural view of a lower nozzle of the quick-change nozzle blank machining and forming die of the invention;

fig. 9 is a schematic sectional structure view of the upper nozzle of the quick-change nozzle blank machining and forming die of the invention;

the reference numbers in the figures illustrate:

1. a water feeding port; 2. a water outlet; 3. a water conduit; 4. a water guide device; 41. an upper water guide block; 42. a lower water guide block; 5. a limiting groove; 6. a fixing device; 61. a fixed seat; 62. a slide rail; 63. a slider; 64. a screw; 65. a first helical gear; 66. a second helical gear; 67. a rotating rod; 68. a positive and negative rotation motor; 7. an elastic pad;

11. a water feeding port zirconium core; 12. a water feeding port boss; 121. a ring groove; 21. a zirconium core of the lower nozzle; 22. a lower nozzle boss; 221. a lower nozzle bowl opening; 222. an annular projection; 23. a circular ring; 30. a mounting seat; 31. an arc frame; 40. supporting legs; 50. a lower bracket; 60. an electric push rod; 70. an upper bracket; 80. a cushion pad; 90. a spring.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

As shown in fig. 1-5, a quick-change nozzle assembly comprises a nozzle 1 and a fixing device 6.

The raw materials for preparing the upper nozzle and the lower nozzle comprise carbon-bonded lightweight porous oxide, and the raw materials for the carbon-bonded lightweight porous oxide comprise alumina hollow spheres, calcium hexaluminate and graphite. The preparation raw materials of the upper nozzle and the lower nozzle also comprise an acidic substance, metal powder and an additive. The acidic substance comprises silicon dioxide or borax; the metal powder comprises aluminum powder or magnesium powder, and the additive comprises bentonite, polyvinyl alcohol and methyl silicone oil.

The water distributor comprises an upper water gap 1, a lower water gap 2, water guide pipes 3, a water guide device 4 and limiting grooves 5, wherein the lower water gap 2 is arranged below the upper water gap 1, the water guide pipes 3 are arranged inside the upper water gap 1 and the lower water gap 2, the water guide pipes 3 are made of high-temperature-resistant materials and used for guiding high-temperature water, the water guide devices 4 are arranged at the joint of the two water guide pipes 3 and used for guiding the water inside the upper water gap 1 into the lower water gap 2, and the limiting grooves 5 are formed in the two ends of the upper water gap 1 and the lower water gap 2;

referring to fig. 4, wherein the fixing device 6 is located between the upper nozzle 1 and the lower nozzle 2, the fixing device 6 includes a fixing seat 61 located inside the limiting groove 5, sliding rails 62 are symmetrically disposed on the fixing seat 61, sliding blocks 63 are disposed inside the sliding rails 62, the sliding blocks 63 are limited and supported by the disposed sliding rails 62, so that the sliding blocks 63 do not fall off when moving, a screw 64 is disposed between the sliding blocks 63 and the fixing seat 61, the screw 64 is in threaded connection with the sliding blocks 63, the sliding blocks 63 slide up and down inside the sliding rails 62 by the rotation of the screw 64, a first helical gear 65 is disposed at one end of each of the two screw 64, a second helical gear 66 is disposed on the fixing seat 61, the second helical gear 66 is in meshed connection with the first helical gear 65, a rotating rod 67 is disposed between the second helical gear 66 and the fixing seat 61, a forward and reverse rotation motor 68 is disposed at one side of the fixing seat 61 away from the fixing seat 61, the output end of the forward and reverse rotation motor 68 is fixedly connected with the rotating rod 67, the forward and reverse rotation motor 68 is started, the forward and reverse rotation motor 68 can select different models according to actual conditions, for example, the model is 3GN150K, the rotating rod 67 is driven to rotate through the output end of the forward and reverse rotation motor 68, the rotating rod 67 drives the second bevel gear 66 to rotate, the second bevel gear 66 is meshed with the first bevel gear 65, the second bevel gear 66 drives the two first bevel gears 65 to synchronously rotate, the two first bevel gears 65 drive the two screw rods 64 to synchronously rotate, and the two screw rods 64 drive the sliding block 63 to synchronously move in the sliding rail 62.

Specifically, referring to fig. 3, the water guide device 4 includes an upper water guide block 41 disposed at the bottom of the upper water gap 1, a lower water guide block 42 disposed at the top of the lower water gap 2, inner walls of the upper water guide block 41 and the lower water guide block 42 are both arc-shaped, an open end of the upper water guide block 41 is smaller than an open end of the lower water guide block 42, water is discharged into the lower water guide block 42 through the upper water guide block 41 for transition between the two water guide pipes 3, and water does not leak in the flowing process because the open end of the upper water guide block 41 is smaller than the open end of the lower water guide block 42.

Specifically, please refer to fig. 4, one side of the sliding block 63 close to the fixing seat 61 is provided with an elastic pad 7, the elastic pad 7 completely wraps one end of the sliding block 63 attached to the upper nozzle 1 and the lower nozzle 2, the sliding block 63 can be buffered by the elastic pad 7, and the sliding block 63 is prevented from damaging the upper nozzle 1 and the lower nozzle 2.

Specifically, referring to fig. 4, the two screw rods 64 have opposite thread directions, so that the screw rods 64 can drive the two sliding blocks 63 to move synchronously in opposite directions, and the screw rods 64 are both located on the fixing base 61 and are connected in a limiting and rotating manner.

Specifically, referring to fig. 1, the water conduit 3 is connected with the upper water guide block 41 and the lower water guide block 42 by casting, so that a gap between the water conduit 3 and the upper water guide block 41 and the lower water guide block 42 can be avoided, the connection surfaces of the upper water gap 1 and the lower water gap 2 are smoothly arranged, and the gap between the upper water gap 1 and the lower water gap 2 can be reduced.

Specifically, referring to fig. 1, the outer side of the water conduit 3 protrudes from the side surface of the upper nozzle 1 or the lower nozzle 2, and the water conduit 3 is connected with a pipeline, which is convenient for supplying water into the upper nozzle 1 or the lower nozzle 2.

The working principle and the using process of the invention are as follows: when the quick-change water gap combined structure is used, the forward and reverse rotation motor 68 is started, the output end of the forward and reverse rotation motor 68 drives the rotating rod 67 to rotate, the rotating rod 67 drives the second bevel gear 66 to rotate, the second bevel gear 66 is meshed with the first bevel gears 65, so that the second bevel gear 66 drives the two first bevel gears 65 to synchronously rotate, the two first bevel gears 65 drive the two screw rods 64 to synchronously rotate, the thread directions of the two screw rods 64 are opposite, the screw rods 64 can drive the two slide blocks 63 to synchronously move in opposite directions, and the slide blocks 63 can fix the positions of the upper water gap 1 and the lower water gap 2; the invention can fix the positions of the upper water gap 1 and the lower water gap 2 and prevent water from leaking.

As shown in fig. 6-9, a nozzle blank forming mold comprises an upper nozzle 1 and a lower nozzle 2, wherein an upper nozzle zirconium core 11 is arranged in the upper nozzle 1, a lower nozzle zirconium core 21 is arranged in the lower nozzle 2, the upper nozzle zirconium core 11 is fixed in the upper nozzle 1 in an embedded manner, the lower nozzle zirconium core 21 is fixed in the lower nozzle 2 in an embedded manner, molten steel channels for molten steel circulation are respectively arranged in the upper nozzle zirconium core 11 and the lower nozzle zirconium core 21, the upper nozzle zirconium core 11 and the lower nozzle zirconium core 21 are located on the same central line, an upper nozzle boss 12 is arranged on the upper nozzle 1, a lower nozzle boss 22 is arranged on the lower nozzle 2, the upper nozzle 1 and the lower nozzle 2 are tightly connected with the lower nozzle boss 22 through the upper nozzle boss 12, an outer side surface of the upper nozzle boss 12 is provided with a ring groove 121, and an outer side surface of the lower nozzle boss 22 is provided with a ring-shaped protrusion 222, the annular groove 121 and the annular bulge 222 are mutually matched and clamped, if the upper nozzle boss 12 and the lower nozzle boss 22 are arranged in a plane, water still seeps out from a seam when the upper nozzle boss 12 and the lower nozzle boss 22 are butted together, the annular groove 121 and the annular bulge 222 arranged on the upper nozzle boss 12 and the lower nozzle boss 22 can be clamped together, the annular groove 121 and the annular bulge 222 play a role in sealing, a gap between the upper nozzle boss 12 and the lower nozzle boss 22 is effectively sealed, and water leakage is prevented;

the mounting, it is inseparable in order to make the installation of upper nozzle 1 and lower mouth of a river 2, be located between upper nozzle boss 12 and lower mouth of a river boss 22, establish mount pad 30 on lower mouth of a river 2 including the cover, the both sides of mount pad 30 all are provided with a pair of supporting leg 40, install lower carriage 50 between a pair of supporting leg 40, be used for supporting lower mouth of a river boss 22, electric putter 60 is all installed along length direction's both sides to lower carriage 5, equal coaxial cover is equipped with spring 90 on each electric putter 60's the activity end, be connected with upper bracket 70 between a pair of electric putter 60, be used for pushing down upper nozzle boss 12, prevent molten steel exosmosis.

Specifically, referring to fig. 6 and 8, the lower nozzle boss 22 is provided with a lower nozzle bowl opening 221 communicated with the lower nozzle zirconium core 21, a circular ring 23 made of zirconia is embedded in the lower nozzle bowl opening 221, and the inner diameter of the lower nozzle bowl opening 221 is larger than that of the bottom of the upper nozzle zirconium core 11, so that the flow rate of molten steel is reduced, the molten steel scouring resistance is improved, and the molten steel is prevented from seeping out from a joint.

Specifically, referring to fig. 8, the upper nozzle zirconium core 11 is in a truncated cone shape, and the diameter of the upper end opening of the upper nozzle zirconium core 11 is larger than that of the lower end opening, so that the scouring force of molten steel on the lower nozzle 2 is reduced.

Specifically, referring to fig. 6-9, the contact surfaces of the upper support 70 and the upper nozzle boss 12 and the contact surfaces of the lower support 50 and the lower nozzle boss 22 are provided with buffering pads 80 made of teflon to prevent the upper support 70 and the lower support 50 from damaging the upper nozzle boss 12 and the lower nozzle boss 22.

Specifically, referring to fig. 6-9, the mounting base 3 includes a pair of arc frames 31 hinged together by a hinge shaft, and one ends of the arc frames 31 far from the hinge shaft are opened and closed by fastening bolts, which can be adjusted in real time according to the diameter and position of the lower nozzle 2, so that the lower nozzle 2 and the upper nozzle 1 are tightly contacted without loosening.

The use principle and the advantages are as follows:

when the device is used, the upper nozzle 1 is placed on the lower nozzle 2, the upper nozzle zirconium core 11 and the lower nozzle zirconium core 21 are positioned on the same central line, the lower support 50 is abutted against the lower nozzle boss 22, the pair of electric push rods 60 are started, the pair of electric push rods 60 drive the upper support 70 to press downwards to press the upper nozzle boss 12, molten steel flows in from the upper nozzle zirconium core 11, the lower nozzle bowl opening 221 communicated with the lower nozzle zirconium core 21 is formed in the lower nozzle boss 22, the circular ring 23 made of zirconia is embedded in the lower nozzle bowl opening 221, the inner diameter of the lower nozzle bowl opening 221 is larger than the inner diameter of the bottom of the upper nozzle zirconium core 11, the flow rate of the molten steel is reduced, the molten steel scouring resistance is improved, and the molten steel is prevented from seeping out from a joint.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the equivalent replacement or change according to the technical solution and the modified concept of the present invention should be covered by the scope of the present invention.