Water gap with low thermal conductivity and thermal shock resistance functions

Abstract

The utility model discloses a nozzle with low thermal conductivity and thermal shock resistance, which comprises a bowl opening, a first connecting section is arranged at the lower end of the bowl opening, a slag line section is arranged at the lower end of the first connecting section, a second connecting section is arranged at the lower end of the slag line section, and thermal insulation ceramics are arranged on the outer walls of the first connecting section, the second connecting section and the slag line section. Two arc-shaped blocks are arranged on the outer side of each of the three heat insulation ceramics, and every two matched arc-shaped blocks are connected through a locking assembly. According to the nozzle, the first iron shell, the second iron shell and the bowl opening can be preliminarily fixed through the arrangement of the clamping blocks on the multiple fixing columns, the iron shell assemblies and the bowl opening can be better adhered together through fire clay, long-time hand holding is not needed, heat exchange between molten steel and the outside can be effectively reduced through the arrangement of heat insulation ceramic, and the service life of the nozzle is prolonged. The generation of carbon slag and steel slag in the molten steel is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of inorganic non-metallic refractory bricks, in particular to a nozzle with low thermal conductivity and thermal shock resistance. Background Art

[0002] As people's requirements for steel quality are getting higher and higher, it is necessary to improve steelmaking technology and steelmaking process. The refining technology outside the furnace is an important refining process in the steelmaking process, which can adjust the steel composition and the temperature of the molten steel. With the continuous technological innovation of the steel and metallurgical industry, steel companies have higher and higher requirements for functional nozzles.

[0003] After searching, the Chinese utility model patent with the publication number CN216989850U discloses a nozzle with low thermal conductivity and thermal shock resistance, including an upper bowl mouth section and a first connecting section, a slag line section and a second connecting section sequentially connected below the upper bowl mouth section, the upper bowl mouth section is provided with an outer wall provided with a blowing assembly, the outer wall of the upper bowl mouth section is covered with an iron shell assembly, the upper bowl mouth section, the first connecting section, the slag line section and the nozzle section center are provided with a water outlet channel, the inner walls of the upper bowl mouth section, the first connecting section, the slag line section and the second connecting section are provided with a high-temperature anti-adhesion coating layer, and the utility model provides a nozzle with low thermal conductivity and thermal shock resistance, which has low thermal conductivity, good thermal insulation effect, good thermal shock resistance, effectively avoids nozzle blockage and carbon increase in the nozzle in the billet, and has a long service life;

[0004] However, in the actual process of the above-mentioned utility model, only high-temperature anti-sticking coating layers are applied on the inner walls of the bowl mouth, the first connecting section, the slag line section and the second connecting section. These high-temperature anti-sticking coating layers can prevent the molten steel from flowing and agglomerating or the carbon slag from adhering to the inner wall. However, there is still a certain heat exchange between the molten steel and the outside world, so that after the molten steel flows, there will be more slag in the molten steel, affecting the subsequent use of the molten steel. In addition, when installing the first iron shell and the second iron shell, the above-mentioned utility model uses fire mud to fill the seams and fix them. During the period of solidification of the fire mud, since no fixing components are set on the first iron shell and the second iron shell, the first iron shell and the second iron shell cannot be immediately loosened, so that the installation of the first iron shell and the second iron shell requires the staff to press them down by hand for a long time, which increases the workload of the staff. Therefore, it is necessary to design a water nozzle with low thermal conductivity and thermal shock resistance to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose a water nozzle with low thermal conductivity and thermal shock resistance. The water nozzle can preliminarily fix the first iron shell, the second iron shell and the bowl mouth through the setting of blocks on multiple fixed columns, so that the fire mud can better adhere the iron shell assembly to the bowl mouth without the need for long-term hand support. Moreover, through the setting of thermal insulation ceramics, it can effectively reduce the heat exchange between molten steel and the outside world, and further reduce the generation of carbon slag and steel slag in the molten steel.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A sprue with low thermal conductivity and thermal shock resistance comprises a bowl mouth, a first connecting section is provided at the lower end of the bowl mouth, a slag line section is provided at the lower end of the first connecting section, a second connecting section is provided at the lower end of the slag line section, the outer walls of the first connecting section, the second connecting section and the slag line section are all provided with thermal insulation ceramics, two arc blocks are provided on the outer sides of the three thermal insulation ceramics, and every two matching arc blocks are connected by a locking assembly.

[0008] Preferably, the locking assembly comprises two mounting blocks arranged on the arc block, each of the mounting blocks is provided with a threaded hole, and bolts are threadedly connected in each two matching threaded holes.

[0009] Preferably, the outer wall of the bowl mouth is covered with an iron shell assembly, and the iron shell assembly includes a first iron shell and a second iron shell, the lower end of the first iron shell and the upper end of the second iron shell are welded to each other, and the first iron shell and the second iron shell are each provided with two fixing holes, and multiple fixing columns are provided on the upper and lower sides of the bowl mouth.

[0010] Preferably, a plurality of the fixed columns are each provided with a positioning assembly, the positioning assembly comprising a movable groove arranged on the fixed column, a clamping block slidably connected in the movable groove, the clamping block is slidably connected to the inner wall of the movable groove, and one side of the clamping block is a slope.

[0011] Preferably, an annular channel is provided in the bowl mouth, a connector is connected to the left side of the annular channel, and a plurality of blowing ports connected to the annular channel are provided on the inner wall of the bowl mouth.

[0012] Preferably, the inner walls of the bowl mouth, the first connecting section, the second connecting section and the slag line section are all provided with a high-temperature anti-sticking coating layer, and the high-temperature anti-sticking coating layer is made of hollow alumina balls.

[0013] Compared with the existing technology, the advantages of this device are:

[0014] Compared with the prior art, the heat-insulating ceramic is arranged so that the efficiency of heat exchange between the molten steel in the first connecting section, the second connecting section and the slag line section and the outside is reduced, thereby reducing the generation of steel slag and carbon slag in the molten steel and ensuring the production quality of the molten steel. At the same time, the heat-insulating ceramic can be tightly attached to the outer wall of the first connecting section, the second connecting section and the slag line section through the arrangement of the two arc-shaped blocks, so as to fix the heat-insulating ceramic.

[0015] Compared with the prior art, by setting fixed columns and blocks, when installing the iron shell assembly, the iron shell assembly, the bowl mouth and the fire clay can be tightly squeezed together, so that there is no need to manually support the iron shell assembly, and the iron shell assembly and the bowl mouth can be tightly fixed together after the fire clay solidifies. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a nozzle with low thermal conductivity and thermal shock resistance proposed by the utility model;

[0017] Figure 2 for Figure 1 Half-section of

[0018] Figure 3 for Figure 1 The enlarged structural diagram at A in the middle;

[0019] Figure 4 for Figure 2 Enlarged structural diagram at B in the middle.

[0020] In the figure: 1 bowl mouth, 2 first iron shell, 3 second iron shell, 4 insulation ceramic, 5 arc block, 6 mounting block, 7 bolt, 8 air blowing port, 9 connector, 10 slag line segment, 11 second connecting segment, 12 annular channel, 13 fixing column, 14 moving groove, 15 return spring, 16 clamping block, 17 first connecting segment. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-Figure 4 A water inlet with low thermal conductivity and thermal shock resistance comprises a bowl mouth 1, a first connecting section 17 is provided at the lower end of the bowl mouth 1, a slag line section 10 is provided at the lower end of the first connecting section 17, a second connecting section 11 is provided at the lower end of the slag line section 10, and insulating ceramics 4 are provided on the outer walls of the first connecting section 17, the second connecting section 11 and the slag line section 10, and two arc blocks 5 are provided on the outer sides of the three insulating ceramics 4, and every two matching arc blocks 5 are connected by a locking assembly, and the locking assembly comprises two mounting blocks 6 arranged on the arc blocks 5, each mounting block 6 is provided with a threaded hole, and bolts 7 are threadedly connected in every two matching threaded holes.

[0023] Among them, the outer wall of the bowl mouth 1 is covered with an iron shell assembly, which includes a first iron shell 2 and a second iron shell 3. The lower end of the first iron shell 2 and the upper end of the second iron shell 3 are welded to each other, and the first iron shell 2 and the second iron shell 3 are each provided with two fixing holes. A plurality of fixing columns 13 are provided on the upper and lower sides of the bowl mouth 1, and a positioning assembly is provided on the plurality of fixing columns 13. The positioning assembly includes a movable groove 14 arranged on the fixing column 13, and a block 16 is slidably connected in the movable groove 14. The block 16 is slidably connected to the inner wall of the movable groove 14, and one side of the block 16 is an inclined surface, the upper sides of the two upper blocks 16 are inclined surfaces, and the lower sides of the two lower blocks 16 are inclined surfaces.

[0024] An annular channel 12 is provided in the bowl mouth 1 , a connector 9 is connected to the left side of the annular channel 12 , and a plurality of blowing ports 8 connected to the annular channel 12 are provided on the inner wall of the bowl mouth 1 .

[0025] Among them, the inner walls of the bowl mouth 1, the first connecting section 17, the second connecting section 11 and the slag line section 10 are all provided with a high-temperature anti-sticking coating layer, and the high-temperature anti-sticking coating layer is made of alumina hollow balls.

[0026] The functional principle of the utility model can be explained through the following operation mode: when installing the water nozzle, the bowl mouth 1, the first connecting section 17, the slag line section 10, and the second connecting section 11 are welded together in sequence, and then the second iron shell 3 passes through the second connecting section 11, the second slag line section 10 and the first connecting section 17, so that the second iron shell 3 is moved to the bottom of the bowl mouth 1, and the fixing column 13 located below passes through the corresponding fixing hole. Since the lower side of the clamping block 16 located below is an inclined surface, the clamping block 16 will be squeezed into the moving groove 14 after entering the fixing hole. When the second iron shell 3 moves to the specified position, the clamping block 16 pops out under the action of the reset spring 15, and the second iron shell 3 is pre-fixed. At this time, fire mud can be used for caulking and secondary fixation;

[0027] According to the above method, the first iron shell 2 is installed above the bowl mouth 1, and then the seams are fixed with fire clay;

[0028] Then, the three insulating ceramics 4 are sleeved on the outside of the first connecting section 17, the slag line section 10 and the second connecting section 11, and the corresponding two arc blocks 5 are aligned and placed on the outside of the insulating ceramics 4. The multiple bolts 7 are rotated in sequence to squeeze the insulating ceramics 4 so that the insulating ceramics 4 are tightly pressed against the outside of the first connecting section 17, the slag line section 10 and the second connecting section 11, and the insulating ceramics 4 are fixed so that the insulating ceramics 4 are not easy to fall off.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low thermal conductivity and thermal shock resistant water outlet, comprising a bowl mouth (1), characterized in that: A first connecting section (17) is provided at the lower end of the bowl mouth (1), a slag line section (10) is provided at the lower end of the first connecting section (17), a second connecting section (11) is provided at the lower end of the slag line section (10), and the outer walls of the first connecting section (17), the second connecting section (11) and the slag line section (10) are all provided with heat insulating ceramics (4), and two arc blocks (5) are provided on the outer sides of the three heat insulating ceramics (4), and every two matching arc blocks (5) are connected by a locking assembly.

2. A low thermal conductivity and thermal shock resistant nozzle according to claim 1, characterized in that: The locking assembly comprises two mounting blocks (6) arranged on the arc-shaped block (5), each mounting block (6) being provided with a threaded hole, and a bolt (7) being threadedly connected in each of two matching threaded holes.

3. A low thermal conductivity and thermal shock resistant nozzle according to claim 1, characterized in that: The outer wall of the bowl mouth (1) is covered with an iron shell assembly, the iron shell assembly comprising a first iron shell (2) and a second iron shell (3), the lower end of the first iron shell (2) and the upper end of the second iron shell (3) are welded to each other, the first iron shell (2) and the second iron shell (3) are each provided with two fixing holes, and a plurality of fixing columns (13) are each provided on the upper and lower sides of the bowl mouth (1).

4. A low thermal conductivity and thermal shock resistant nozzle according to claim 3, characterized in that: A plurality of the fixed columns (13) are each provided with a positioning assembly, the positioning assembly comprising a movable groove (14) arranged on the fixed column (13), a clamping block (16) being slidably connected in the movable groove (14), the clamping block (16) being slidably connected to an inner wall of the movable groove (14), and one side of the clamping block (16) being an inclined surface.

5. The low thermal conductivity and thermal shock resistant nozzle according to claim 1, characterized in that: An annular channel (12) is provided in the bowl mouth (1), the left side of the annular channel (12) is connected to a connector (9), and the inner wall of the bowl mouth (1) is provided with a plurality of blowing ports (8) connected to the annular channel (12).

6. The low thermal conductivity and thermal shock resistant nozzle according to claim 1, characterized in that: The inner walls of the bowl mouth (1), the first connecting section (17), the second connecting section (11) and the slag line section (10) are all provided with a high-temperature anti-adhesion coating layer, and the high-temperature anti-adhesion coating layer is made of alumina hollow spheres.

Images