High-temperature-resistant forced-cooling feed opening device

Abstract

An inner ring of a flange plate is connected with the upper opening end of an inner cylinder, an outer cylinder is arranged on the periphery of the inner cylinder, and a lower sealing ring is arranged at the lower end between the inner cylinder and the outer cylinder and forms an inner cavity; and one side of the upper part of the outer cylinder is connected with a water inlet pipe, and the other side of the upper part of the outer cylinder is connected with a bent water outlet pipe. According to the utility model, the part easy to burn is cooled by using the strong cooling spray pipe, so that rapid heat exchange in a high-temperature area can be realized, and the mechanical property and the weld strength of the part influenced by high-temperature flue gas are ensured. The problems that a conventional feed opening is too large in loss and too short in service life are solved, the feed opening is simple in structure, convenient to use and long in service life, and manufacturing and maintenance cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a feed opening structure in a high-temperature zone of a converter, in particular to a feed opening device for a converter that is used for high-temperature resistant strong cooling. Background Art

[0002] During the production process of the steelmaking converter in the metallurgical industry, the molten iron undergoes an oxidation reaction through oxygen blowing, during which lime, ore and other furnace materials need to be added through the feed port device installed on the vaporization flue above the furnace mouth. This feed port device is exposed to the high-temperature flue gas of 1000 degrees converter smelting for a long time, and it is easy to lose mechanical properties and burn due to excessive temperature, which reduces the service life and poses great safety risks.

[0003] The feed port device in the converter vaporization and cooling flue is installed on the vaporization and cooling flue located at the converter furnace mouth. Since the feed port device is very close to the converter furnace mouth, the lower port in the feed port device is not only affected by the thermal radiation of high-temperature molten steel above 1200℃ during smelting, but also by splashes such as slag liquid attached to the feed port, thus forming a high-temperature triangle zone.

[0004] The current discharge port device is generally a water tank type discharge port or a close-packed tube type converter lime discharge port structure. The traditional water tank type discharge port device has a vertical partition between the inner and outer cylinders, and the cooling water flows in a Z-shaped circumferential direction. There is water leakage from the partition, and the circumferential temperature difference is large, which can easily cause weld cracking and leakage. The close-packed tube type converter lime discharge pipe has a cooling pipe arranged between the inner and outer cylinders and parallel to the discharge channel. The cooling pipes are connected in series or the upper and lower water collecting tank cooling pipes are connected in parallel. The weld is easily affected by the impact and wear of the material, causing leakage.

[0005] The existing Chinese patent (publication number: CN109576438A) discloses a discharge port device for a converter vaporization cooling flue, wherein a first flange is arranged on the top of the anti-wear cylinder, and a second flange is arranged on the top of the discharge port. After the anti-wear cylinder is inserted into the inner cylinder of the discharge port, it is connected by the first flange and the second flange, thereby fixing the anti-wear cylinder in the inner cylinder of the discharge port; a nitrogen sealing device is also fixed on the top of the anti-wear cylinder. The anti-wear cylinder cannot fit tightly with the cooling jacket, the cooling effect is poor, it is easy to deform and block materials, and a large amount of nitrogen is consumed for cooling, which increases the production cost. Utility Model Content

[0006] The utility model provides a high temperature resistant strong cooling feed opening device to replace the traditional water tank type or close-packed tube type converter lime feed opening pipe, thereby reducing the consumption of the feed opening and lowering the safety risk of water leakage.

[0007] The utility model adopts the following technical scheme to achieve the above-mentioned purpose. A high-temperature resistant forced cooling feed port device, comprising a flange, characterized in that the inner ring of the flange is connected to the upper end of the inner tube, an outer tube is arranged on the outer periphery of the inner tube, a lower closed ring is arranged at the lower end between the inner tube and the outer tube to form an inner cavity; the upper end of the outer tube is connected to the inner side of the flange, one side of the upper part of the outer tube is connected to a water inlet pipe, and the other side is connected to a curved water outlet pipe, an inner cavity diaphragm ring is arranged in the inner cavity below the water inlet pipe and the water outlet pipe, a through hole is arranged on the inner cavity diaphragm ring, the through hole is connected to the upper end of the forced cooling nozzle, and a diaphragm ring water outlet hole is arranged on the inner cavity diaphragm ring below the water outlet pipe, a fixing ring is installed at the lower end of the forced cooling nozzle, the fixing ring is connected to the inner tube and the outer tube, the inner end of the water outlet pipe is connected to the outer plate of the longitudinal diaphragm frame, and the inner cavity of the longitudinal diaphragm frame corresponds to the diaphragm ring water outlet hole.

[0008] Furthermore, the distances between the center lines of the water inlet pipe and the water outlet pipe and the flange plane are equal.

[0009] Furthermore, the water outlet hole of the partition ring is square or elliptical, and the outer periphery is smaller than the inner periphery of the longitudinal partition frame.

[0010] Furthermore, the lower closed ring is connected to the walls of the inner tube and the outer tube via an inclined surface.

[0011] Furthermore, the angle between the inner plane of the lower closed ring and the walls of the inner tube and the outer tube is 30 degrees.

[0012] The utility model realizes rapid heat exchange in high temperature areas by using a strong cooling nozzle to cool the easily burned parts, thereby ensuring the mechanical properties and weld strength of the parts affected by high temperature smoke, and solving the problems of excessive loss and short life of conventional feed ports. The utility model has a simple structure, is easy to use, has a long service life, and greatly reduces manufacturing and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of the structure of the utility model;

[0014] Figure 2 yes Figure 1 Middle AA section view;

[0015] Figure 3 yes Figure 1 Middle BB section view.

[0016] In the figure: 1. flange, 2. water inlet pipe, 3. water outlet pipe, 4. outer cylinder, 5. inner cylinder, 6. strong cooling nozzle, 7. transverse diaphragm ring in the cavity, 8. diaphragm ring water outlet hole, 9. lower closing ring, 10. longitudinal diaphragm frame, 11. fixing ring. DETAILED DESCRIPTION

[0017] The utility model is further described below with reference to the accompanying drawings and embodiments. Figures 1 to 3A high temperature resistant strong cooling feed port device comprises a flange 1, the inner ring of the flange 1 is connected to the upper end of an inner tube 5, an outer tube 4 is arranged on the outer periphery of the inner tube 5, a lower sealing ring 9 is arranged at the lower end between the inner tube 5 and the outer tube 4 to form an inner cavity, and the lower sealing ring 9 is connected to the inner tube 5 and the outer tube 4 at an angle α of 30 degrees (such as Figure 1 As shown). The upper end of the outer cylinder 4 is connected to the inner side of the flange 1, one side of the upper part of the outer cylinder 4 is connected to the water inlet pipe 2, and the other side is connected to the curved water outlet pipe 3, the center lines of the water inlet pipe 2 and the water outlet pipe 3 are at the same distance from the flange 1, and an intracavity transverse diaphragm ring 7 is provided in the inner cavity below the water inlet pipe 2 and the water outlet pipe 3, and a through hole is provided on the intracavity transverse diaphragm ring 7, which is connected to the upper end of the strong cooling nozzle 6, and a diaphragm ring water outlet hole 8 is provided on the intracavity transverse diaphragm ring 7 below the water outlet pipe 3, and the diaphragm ring water outlet hole 8 is square or elliptical, and the outer periphery is smaller than the inner periphery of the longitudinal diaphragm frame 10 (as shown in FIG. Figure 3 As shown), a fixing ring 11 is installed at the lower end of the strong cooling nozzle 6, and the fixing ring 11 is connected to the inner tube 5 and the outer tube 4. The inner port of the water outlet pipe 3 is connected to the outer plate of the longitudinal partition frame 10, and the inner cavity of the longitudinal partition frame 10 corresponds to the water outlet hole 8 of the partition ring. (As shown Figure 1 as shown).

[0018] The upper end of the inner tube 5 of the discharge port of the utility model is connected to the flange 1 by welding, and the outer tube 4 is welded to the inner side of the flange 1. The inner tube 5 and the outer tube 4 form an inner cavity of the discharge port tube. An inlet pipe 2 is welded to one side of the upper part of the outer tube 4, and an outlet pipe 3 is welded to the other side. An intracavity diaphragm ring 7 is fixedly installed in the inner cavity of the discharge port tube below the inlet pipe 2 and the outlet pipe 3. A plurality of small through holes are arranged on the intracavity diaphragm ring 7, and a strong cooling nozzle 6 is welded below the small through holes. The cross section of the strong cooling nozzle 6 is circular, and its lower end reaches the lower closed ring 9 at the bottom of the inner cavity, directly cooling the contact part of the high-temperature flue gas. In addition, the intracavity diaphragm ring 7 is provided with a large elliptical through hole below the corresponding outlet pipe 3. The large through hole is used for the cooling water in the inner cavity of the discharge port tube to be directly discharged from the outlet pipe 3 to the outside of the device body (such as Figure 3 As shown). The strong cooling nozzle 6 is fixed between the inner tube 5 and the outer tube 4 by a fixing ring 11. Since the lower parts of the inner tube 5 and the outer tube 4 are in direct contact with the high-temperature flue gas, they are easily damaged. When the cooling intensity is insufficient, the conventional discharge port device directly contacts the high-temperature flue gas part, which is easy to reduce the mechanical properties of the material, causing melting and leakage. By spraying cooling water from the strong cooling nozzle 6 to directly strong-cool the high-temperature part, the high-temperature and vulnerable parts of the discharge port device can continue to maintain the mechanical properties of the material, ensure the strength of the weld, and reduce the risk of leakage. The structure of the utility model is not only easy to manufacture, but also very safe, which extends the service life of the discharge port device by 2 times, meeting the needs of the metallurgical industry for adding charge to the high-temperature area of ​​the converter for a long time.

Claims

1. A high temperature resistant strong cooling feed port device, comprising a flange, characterized in that: The inner ring of the flange is connected to the upper end of the inner tube, the outer tube is provided on the outer periphery of the inner tube, and a lower closed ring is provided at the lower end between the inner tube and the outer tube to form an inner cavity; the upper end of the outer tube is connected to the inner side surface of the flange, one side of the upper part of the outer tube is connected to a water inlet pipe, and the other side is connected to a curved water outlet pipe, an inner cavity transverse diaphragm ring is provided in the inner cavity below the water inlet pipe and the water outlet pipe, a through hole is provided on the inner cavity transverse diaphragm ring, the through hole is connected to the upper end of the strong cooling nozzle, and a diaphragm ring water outlet hole is provided on the inner cavity transverse diaphragm ring below the water outlet pipe, a fixing ring is installed at the lower end of the strong cooling nozzle, the fixing ring is connected to the inner tube and the outer tube, the inner port of the water outlet pipe is connected to the outer plate of the longitudinal diaphragm frame, and the inner cavity of the longitudinal diaphragm frame corresponds to the diaphragm ring water outlet hole.

2. The high temperature resistant strong cooling feed port device according to claim 1, characterized in that: The distances between the center lines of the water inlet pipe and the water outlet pipe (3) and the plane of the flange are equal.

3. The high temperature resistant strong cooling feed port device according to claim 1, characterized in that: The water outlet hole of the partition ring is square or oval, and the outer periphery is smaller than the inner periphery of the longitudinal partition frame.

4. The high temperature resistant strong cooling feed port device according to claim 1, characterized in that: The lower closed ring is connected to the cylinder walls of the inner cylinder and the outer cylinder via an inclined surface.

5. The high temperature resistant strong cooling feed port device according to claim 1, characterized in that: The included angle between the inner plane of the lower closed ring and the cylinder walls of the inner cylinder and the outer cylinder is 30 degrees.

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