Water cooling device for protecting oxygen lance insertion hole

Abstract

The utility model relates to a water cooling device for protecting an oxygen lance insertion hole, and relates to the field of metal processing, the water cooling device comprises an annular water tank, the water tank is provided with a water inlet cavity and a water return cavity, the water tank is fixedly communicated with a water inlet pipe communicated with the water inlet cavity, and the water tank is further fixedly communicated with a water return pipe communicated with the water return cavity; a circle of outer pipe is fixedly connected to the lower portion of the water tank, the bottom of the outer pipe is in a blocked shape, the outer pipe is communicated with the water return cavity, an inner pipe is inserted into the outer pipe and connected with the water tank, the top of the inner pipe is communicated with the water inlet cavity, the bottom of the inner pipe is communicated with the outer pipe, and the bottom of the outer pipe is wrapped with a wear-resisting layer. The inscribed circle diameter of the wear-resistant layer is smaller than the inner diameter of the ring body defined by the circle of outer pipe. The water cooling device has the effect of prolonging the service life.

Description

Technical Field

[0001] This application relates to the field of metal smelting, and particularly to a water-cooling device for protecting the oxygen lance insertion hole. Background Art

[0002] When a converter is in operation, the oxygen lance needs to be inserted downward from the oxygen lance insertion hole of the vaporization cooling flue into the converter until the bottom of the converter; high-pressure oxygen is ejected from the oxygen lance head. Under the blowing of the high-pressure oxygen, the molten iron in the converter fluctuates and tumbles violently. At the same time, oxygen reacts with carbon in the molten iron to form CO and steel slag, reducing the carbon and other impurity contents in the molten iron, and the molten iron is thus smelted into molten steel.

[0003] The oxygen lance is of a water-cooled structure. After the violently tumbling molten iron and the generated steel slag come into contact with the oxygen lance body, they will condense and solidify on its surface to form a relatively hard condensation layer. After the blowing is completed, the oxygen lance with the condensation layer will pass through the oxygen lance opening again and be lifted to a certain height, which causes the condensation layer of the oxygen lance to wear the oxygen lance opening, thus wearing out the heating tube coil of the oxygen lance opening and causing a water leakage accident in the vaporization flue body. The leaked water falls into the converter interior, and major safety accidents such as explosion may occur; in order to protect the oxygen lance opening of the flue from being scratched and worn by the condensation layer of the oxygen lance, a water-cooling device is provided at the oxygen lance hole. The water-cooling device adopts an independent cooling system, allowing the oxygen lance condensation layer to wear the water-cooling device first. After the water-cooling device is worn out, due to its simple structure, low cost, and convenient replacement, the replacement and maintenance cost is low, protecting the stability of the oxygen lance insertion hole of the flue and improving the production safety.

[0004] However, due to the extremely harsh production conditions of the current water-cooling device, the flue gas temperature changes periodically between high and low, and the working temperature is very high, reaching 1600 °C. The oxygen lance condensation layer continuously wears the water-cooling device, resulting in rapid wear of the water-cooling device and a low service life of the water-cooling device. Utility Model Content

[0005] In order to extend the service life of the water-cooling device, this application provides a water-cooling device for protecting the oxygen lance insertion hole.

[0006] This application provides a water-cooling device for protecting the oxygen lance insertion hole, which adopts the following technical solution:

[0007] A water-cooling device for protecting the oxygen lance insertion hole, including an annular water tank. The water tank has a water inlet chamber and a water return chamber. A water inlet pipe communicating with the water inlet chamber is fixedly connected to the water tank. A water return pipe communicating with the water return chamber is also fixedly connected to the water tank. A circle of outer pipes is fixedly connected below the water tank. The bottom of the outer pipe is sealed and the outer pipe communicates with the water return chamber. An inner pipe is inserted into the outer pipe. The inner pipe is connected to the water tank. The top of the inner pipe communicates with the water inlet chamber and the bottom of the inner pipe communicates with the outer pipe. The bottom of the outer pipe is wrapped with a wear-resistant layer. The inner diameter of the inscribed circle of the wear-resistant layer is smaller than the inner diameter of the ring formed by the circle of outer pipes.

[0008] By adopting the above technical solution, before the water-cooling device works, the operator installs the water tank at the oxygen lance opening of the converter. The water inlet pipe is connected to the water source and water flows in. When the oxygen lance works, the oxygen lance is inserted into the circle of outer pipes. The water in the water inlet pipe flows into the water inlet chamber and the inner pipe in sequence, and then flows into the outer pipe. The outer pipe cools the oxygen lance. The used water flows out through the water return chamber and the water return pipe in sequence; when the oxygen lance is withdrawn, the end of the oxygen lance contacts the wear-resistant layer, and the wear-resistant layer grinds off the slag at the end of the oxygen lance, making the diameter of the slag at the end of the oxygen lance smaller than the inner diameter of the ring formed by the circle of outer pipes, reducing the occurrence of the slag at the end of the oxygen lance scraping and wearing the water return pipe, thereby prolonging the service life of the water-cooling device.

[0009] Optionally, the wear-resistant layer is in the shape of an annular cylinder, and the inner diameter of the wear-resistant layer is smaller than the inner diameter of the ring formed by the circle of outer pipes.

[0010] Optionally, the water tank includes an annular flange and a sealing plate. The sealing plate is located below the flange. An inner ring and an outer ring with the same axis are arranged between the sealing plate and the flange. The outer ring includes an upper plate and a lower plate. The top of the upper plate is fixed to the flange, and the bottom of the lower plate is fixed to the sealing plate. A partition plate is arranged between the sealing plate and the flange. The inner wall of the partition plate is fixed to the inner ring. The partition plate is located between the upper plate and the lower plate and is fixed to both the upper plate and the lower plate. The water inlet pipe is located above the partition plate, and the water return pipe is located below the partition plate. The area above the partition plate is the water inlet chamber, and the area below the partition plate is the water return chamber. The outer pipe penetrates through the sealing plate and is fixed to the sealing plate. The inner pipe penetrates through the partition plate and is fixed to the partition plate.

[0011] By adopting the above technical solution, the operator inserts the outer pipe into the oxygen lance opening and fixes the flange to the oxygen lance opening with bolts. Water enters the water inlet chamber between the partition plate and the flange through the water inlet pipe, then flows into the inner pipe, flows into the outer pipe through the inner pipe, the water in the outer pipe flows into the water return chamber, and finally flows out to the outside through the water return pipe.

[0012] Optionally, the water tank includes an annular water inlet tank and a water return tank located below the water inlet tank. The inside of the water inlet tank is a water inlet cavity, and the inside of the water return tank is a water return cavity. The water inlet pipe is fixedly communicated with the water inlet tank. The top of the outer pipe is fixedly communicated with the water return tank. The inner pipe penetrates through the water return tank and is fixedly communicated with the water return tank. The inner pipe is fixedly communicated with the water inlet tank;

[0013] A circular sealing plate is fixedly provided at the common top of all the outer pipes. The inner pipe penetrates through the sealing plate. An annular mounting plate is provided below the sealing plate. The outer pipes penetrate through the mounting plate and are fixed to the mounting plate. A connecting plate located among the outer pipes in a circle is fixedly connected to the mounting plate. The upper surface of the connecting plate is higher than the water inlet tank. The upper end of the connecting plate is fixedly connected with a circular flange.

[0014] By adopting the above technical solution, the operator fixes the flange to the oxygen gun nozzle through bolts. Water flows into the water inlet tank through the water inlet pipe. The water in the water inlet tank flows into the outer pipe through the inner pipe. The water in the outer pipe flows into the water return tank and finally flows out to the outside through the water return pipe.

[0015] Optionally, connecting pipes are fixedly communicated with the tops of both the inner pipe and the outer pipe. The connecting pipe corresponding to the outer pipe is fixedly communicated with the water return tank, and the connecting pipe corresponding to the inner pipe is fixedly communicated with the water inlet tank.

[0016] Optionally, threaded pipes corresponding to the connecting pipes one by one are integrally formed on the sides of the water inlet tank and the water return tank away from the connecting plate. First plugs are threadedly connected in the threaded pipes.

[0017] By adopting the above technical solution, when the inner pipe or the outer pipe is damaged, the operator unscrews the corresponding first plug and then plugs the water inlet of the corresponding connecting pipe to prevent water from flowing into the damaged inner pipe and outer pipe, reducing the occurrence of water leakage from the damaged inner pipe and outer pipe.

[0018] Optionally, threads are provided on the inner wall of the end of the connecting pipe away from the connecting plate, and a detachable second plug is threadedly connected in the connecting pipe.

[0019] By adopting the above technical solution, when the inner pipe and the outer pipe are working normally, the second plug does not block the corresponding connecting pipe. When it is necessary to block the connecting pipe, the second plug is screwed into the connecting pipe, and the second plug blocks the connecting pipe.

[0020] In summary, the present application includes at least the following beneficial technical effects:

[0021] 1. By arranging the water tank, the water inlet pipe, the water return pipe, the inner pipe, the outer pipe and the wear-resistant body, the service life of the water cooling device is prolonged;

[0022] 2. By setting up a water inlet tank, a water return tank, a connecting pipe, a first plug and a second plug, the leakage of water from the damaged inner pipe and outer pipe is reduced. Description of the Drawings

[0023] Figure 1 FIG. is a schematic diagram showing the overall structure of the water cooling device in Embodiment 1 of the present application.

[0024] Figure 2 FIG. is a cross-sectional view showing the overall structure of the water cooling device in Embodiment 1 of the present application.

[0025] Figure 3 FIG. is a cross-sectional view showing the specific structure of the water tank in Embodiment 1 of the present application.

[0026] Figure 4 FIG. is a schematic diagram showing the overall structure of the water cooling device in Embodiment 2 of the present application.

[0027] Figure 5 FIG. is a cross-sectional view showing the overall structure of the water cooling device in Embodiment 2 of the present application.

[0028] Figure 6 FIG. is a cross-sectional view showing the specific structure of the water tank in Embodiment 2 of the present application.

[0029] Description of Reference Numerals: 1. Water tank; 11. Flange; 12. Plugging plate; 121. Mounting plate; 122. Connecting plate; 13. Inner ring; 14. Outer ring; 141. Upper plate; 142. Lower plate; 15. Partition plate; 16. Water inlet chamber; 17. Water return chamber; 18. Water inlet tank; 181. Threaded pipe; 19. Water return tank; 2. Water inlet pipe; 3. Water return pipe; 4. Outer pipe; 5. Inner pipe; 6. Wear-resistant body; 7. Connecting pipe; 8. First plug; 9. Second plug. Detailed Description of the Embodiment

[0030] The following further elaborates on the present application Figure 1-6 in conjunction with the attached drawings.

[0031] Embodiment 1 of the present application discloses a water cooling device for protecting the oxygen lance insertion hole.

[0032] Embodiment 1

[0033] Refer to Figure 1 , Figure 2 and Figure 3, the water cooling device includes an annular water tank 1. The water tank 1 includes a flange 11 and a sealing plate 12 located below the flange 11. The flange 11 and the sealing plate 12 are both annular and coaxial. It also includes an inner ring 13 and an outer ring 14 located between the flange 11 and the sealing plate 12. Both the inner ring 13 and the outer ring 14 are coaxial with the flange 11. A horizontal partition plate 15 is provided between the inner ring 13 and the outer ring 14. The inner side wall of the partition plate 15 is fixed to the inner ring 13. The outer ring 14 includes an annular upper plate 141 and a lower plate 142. The partition plate 15 is located between the upper plate 141 and the lower plate 142. The top of the upper plate 141 is fixed to the flange 11. The bottom of the upper plate 141 is fixed to the partition plate 15. The upper end of the lower plate 142 is fixed to the partition plate 15. The bottom of the lower plate 142 is fixed to the sealing plate 12; the space between the partition plate 15 and the flange 11 is the water inlet chamber 16, and the space between the partition plate 15 and the sealing plate 12 is the water return chamber 17. The outer ring 14 is connected with a water inlet pipe 2 and a water return pipe 3. The water inlet pipe 2 is communicated with the water inlet chamber 16, and the water return pipe 3 is communicated with the water return chamber 17.

[0034] A plurality of outer pipes 4 are fixedly connected to the lower surface of the sealing plate 12. The outer pipes 4 penetrate through the sealing plate 12 and are fixed to the sealing plate 12, and the outer pipes 4 are communicated with the water return chamber 17. The plurality of outer pipes 4 are evenly distributed along the circumferential direction of the sealing plate 12; an inner pipe 5 with both ends open is inserted into each outer pipe 4. The top of the inner pipe 5 penetrates through the sealing plate 12 and the partition plate 15, and the inner pipe 5 is fixed to the sealing plate 12 and the partition plate 15. The top of the inner pipe 5 is communicated with the water inlet chamber 16.

[0035] A wear-resistant body 6 is provided at the bottom of the outer pipe 4. The wear-resistant body 6 can be forged or cast. The wear-resistant body 6 is annular, and the inner diameter of the ring formed by the outer pipes 4 in a circle is larger than the inner diameter of the wear-resistant body 6; in this embodiment, the wear-resistant body 6 is clamped with the outer pipe 4. In other embodiments, the wear-resistant body 6 can be fixed to the outer pipe 4. The wear-resistant body 6 can also be a rectangular frame body, and the diameter of the inscribed circle of the wear-resistant body 6 is smaller than the inner diameter of the ring formed by the outer pipes 4 in a circle.

[0036] Before the water cooling device works, the operator installs the flange 11 at the oxygen lance opening of the converter through bolts, and the water inlet pipe 2 is communicated with the water source and water flows in. When the oxygen lance works, the oxygen lance is inserted into the outer pipes 4 in a circle. The water in the water inlet pipe 2 flows into the water inlet chamber 16 and the inner pipe 5 in sequence, and then flows into the outer pipes 4, which can cool the oxygen lance. The used water flows out after passing through the water return chamber 17 and the water return pipe 3 in sequence; as the oxygen lance works, the splashed molten steel falls on the end of the oxygen lance and solidifies at the end of the oxygen lance, making the diameter of the end of the oxygen lance gradually increase.

[0037] When the operator withdraws the oxygen lance, the end of the oxygen lance contacts the wear-resistant layer. When pulling the oxygen lance, the wear-resistant layer can grind off the steel slag at the end of the oxygen lance, making the diameter of the steel slag at the end of the oxygen lance smaller than the inner diameter of the ring formed by the outer tube 4 in one circle, reducing the occurrence of the steel slag at the end of the oxygen lance scraping and grinding the return water pipe 3, thereby prolonging the service life of the water cooling device.

[0038] The implementation principle of Embodiment 1 of this application is as follows: The operator fixes the flange 11 at the oxygen lance opening through bolts. After water passes through the water inlet pipe 2, the water inlet cavity 16, the inner tube 5, the outer tube 4, the return water cavity 17, and the return water pipe 3 in sequence, it flows out to the outside world. At the same time, the water cools the oxygen lance; when the oxygen lance is withdrawn, the wear-resistant body 6 scrapes off the steel slag on the oxygen lance.

[0039] Embodiment 2

[0040] Refer to Figure 4 、 Figure 5 And Figure 6 In this embodiment, the difference from Embodiment 1 is that an inner tube 5 is inserted into the outer tube 4 in one circle. The plugging plate 12 is located at the upper end of the outer tube 4 in one circle, and the upper end of the outer tube 4 is fixed to the plugging plate 12. The inner tube 5 penetrates through the plugging plate 12; below the plugging plate 12, there is a coaxial annular mounting plate 121. The mounting plate 121 is located inside the plugging plate 12, and the plugging plate 12 is fixed to the mounting plate 121. The outer tube 4 penetrates through the mounting plate 121 and is fixedly connected to the mounting plate 121. A connecting plate 122 located between the outer tubes 4 in one circle is fixedly connected to the mounting plate 121. The connecting plate 122 is coaxial with the plugging plate 12, and the flange 11 is fixedly connected to the upper surface of the connecting plate 122.

[0041] An inlet water tank 18 and a return water tank 19 are provided outside the outer tube 4. The inlet water tank 18 is located above the return water tank 19. The inlet water cavity 16 is inside the inlet water tank 18, and the return water cavity 17 is inside the return water tank 19. The water inlet pipe 2 is fixedly connected and communicated with the inlet water tank 18, and the return water pipe 3 is fixedly connected and communicated with the return water tank 19; a connecting pipe 7 is fixedly connected and communicated with the side wall of the outer tube 4. The connecting pipe 7 on the outer tube 4 is fixedly connected and communicated with the return water tank 19. A connecting pipe 7 is also fixedly connected to the top of the inner tube 5. The connecting pipe 7 of the inner tube 5 is fixedly connected and communicated with the inlet water tank 18.

[0042] Threaded pipes 181 corresponding to the connecting pipes 7 one by one are integrally formed on both the inlet water tank 18 and the return water tank 19. First plugs 8 are screwed into the threaded pipes 181; threads are provided on the inner wall of one end of the connecting pipe 7 close to the threaded pipe 181, and a second plug 9 is screwed into the connecting pipe 7.

[0043] When the water cooling device is working, the second plug 9 is not screwed onto the connecting pipe 7. Water flows through the water inlet pipe 2, the water inlet tank 18, the inner pipe 5, the outer pipe 4, the water return tank 19, and the water return pipe 3 in sequence and then flows out to the outside. When the inner pipe 5 and the outer pipe 4 are damaged, the operator unscrews the corresponding first plug 8 and screws the second plug 9 onto the corresponding connecting pipe 7, so that water stops flowing into the corresponding inner pipe 5 and outer pipe 4, reducing the leakage of water through the damaged inner pipe 5 and outer pipe 4 into the converter. Finally, the first plug 8 is screwed onto the threaded pipe 181.

[0044] The implementation principle of Embodiment 2 of this application is as follows: Water flows through the water inlet pipe 2, the water inlet tank 18, the inner pipe 5, the outer pipe 4, the water return tank 19, and the water return pipe 3 in sequence and then flows out to the outside. When the inner pipe 5 and the outer pipe 4 are damaged, the operator unscrews the corresponding first plug 8, screws the second plug 9 onto the corresponding connecting pipe 7, and then screws the first plug 8 onto the threaded pipe 181.

[0045] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A water cooling device for protecting an oxygen lance insertion hole, comprising a ring-shaped water tank (1), the water tank (1) having a water inlet chamber (16) and a water return chamber (17), a water inlet pipe (2) connected to the water inlet chamber (16) being fixedly connected to the water tank (1), a water return pipe (3) connected to the water return chamber (17) being fixedly connected to the water tank (1), a circle of outer tubes (4) being fixedly connected below the water tank (1), the bottom of the outer tubes (4) being in a blocked shape, and the outer tubes (4) being connected to the water return chamber (17), an inner tube (5) being inserted into the outer tube (4), the inner tube (5) being connected to the water tank (1), the top of the inner tube (5) being connected to the water inlet chamber (16), and the bottom of the inner tube (5) being connected to the outer tube (4), wherein: The bottom of the outer tube (4) is wrapped with a wear-resistant layer, and the diameter of the inscribed circle of the wear-resistant layer is smaller than the inner diameter of a ring body formed by a circle of the outer tube (4).

2. A water cooling device for protecting an oxygen lance insertion hole according to claim 1, characterized in that: The wear-resistant layer is in the shape of an annular cylinder, and the inner diameter of the wear-resistant layer is smaller than the inner diameter of a ring body surrounded by a circle of outer tubes (4).

3. A water cooling device for protecting an oxygen lance insertion hole according to claim 1 or 2, characterized in that: The water tank (1) comprises an annular flange (11) and a sealing plate (12); the sealing plate (12) is located below the flange (11); a coaxial inner ring (13) and an outer ring (14) are provided between the sealing plate (12) and the flange (11); the outer ring (14) comprises an upper plate (141) and a lower plate (142); the top of the upper plate (141) is fixed to the flange (11); the bottom of the lower plate (142) is fixed to the sealing plate (12); a partition plate (15) is provided between the sealing plate (12) and the flange (11); the inner wall of the partition plate (15) is connected to the flange (11); The inner ring (13) is fixed, the partition (15) is located between the upper plate (141) and the lower plate (142), the partition (15) is fixed to the upper plate (141) and the lower plate (142), the water inlet pipe (2) is located above the partition (15), the water return pipe (3) is located below the partition (15), the water inlet chamber (16) is located above the partition (15), and the water return chamber (17) is located below the partition (15), the outer tube (4) passes through the sealing plate (12) and is fixed to the sealing plate (12), and the inner tube (5) passes through the partition (15) and is fixed to the partition (15).

4. A water cooling device for protecting an oxygen lance insertion hole according to claim 1 or 2, characterized in that: The water tank (1) comprises an annular water inlet tank (18) and a water return tank (19) located below the water inlet tank (18); the water inlet tank (18) contains a water inlet chamber (16); the water return tank (19) contains a water return chamber (17); the water inlet pipe (2) is fixedly connected to the water inlet tank (18); the top of the outer pipe (4) is fixedly connected to the water return tank (19); the inner pipe (5) passes through the water return tank (19) and is fixedly connected to the water return tank (19); and the inner pipe (5) is fixedly connected to the water inlet tank (18); An annular plugging plate (12) is commonly fixed to the top of all the outer tubes (4); the inner tubes (5) penetrate the plugging plate (12); an annular mounting plate (121) is provided below the plugging plate (12); the outer tubes (4) penetrate the mounting plate (121) and are fixed to the mounting plate (121); a connecting plate (122) located in a circle of outer tubes (4) is fixedly connected to the mounting plate (121); the upper surface of the connecting plate (122) is higher than the water inlet tank (18); and the upper end of the connecting plate (122) is fixedly connected to an annular flange (11).

5. A water cooling device for protecting an oxygen lance insertion hole according to claim 4, characterized in that: The inner tube (5) and the outer tube (4) are both fixedly connected with a connecting tube (7) at the top; the connecting tube (7) corresponding to the outer tube (4) is fixedly connected to a return water tank (19); and the connecting tube (7) corresponding to the inner tube (5) is fixedly connected to a water inlet tank (18).

6. A water cooling device for protecting an oxygen lance insertion hole according to claim 5, characterized in that: The water inlet tank (18) and the water return tank (19) are integrally formed with a threaded tube (181) corresponding one-to-one to the connecting tube (7) on one side away from the connecting plate (122), and the first plug (8) is threadedly connected to the threaded tube (181).

7. A water cooling device for protecting an oxygen lance insertion hole according to claim 6, characterized in that: A thread is provided on the inner wall of one end of the connecting pipe (7) away from the connecting plate (122), and a detachable second plug (9) is threadedly connected to the connecting pipe (7).

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