A guiding structure for installing an inserted gun barrel and an inserted gun barrel assembly

Abstract

The present invention provides a guiding structure for installing an inserting gun barrel and an inserting gun barrel assembly. The guiding structure includes a positioning cylinder into which the inserting gun barrel is inserted. The positioning cylinder is fixed on the outer wall of the converter flue. The central axis of the positioning cylinder coincides with the centering center line of the inserting gun barrel on the converter flue. The positioning cylinder is internally communicated with the converter flue, and a positioning member for coaxially positioning the positioning cylinder and the inserting gun barrel is provided on the positioning cylinder. The present invention solves the problem in the prior art that the installation positions of the oxygen nozzle and the auxiliary nozzle need to be continuously adjusted to complete centering, making the replacement of the oxygen nozzle and the auxiliary nozzle more convenient and fast. Since the guiding structure does not need to be removed from the converter flue when replacing the oxygen nozzle and the auxiliary nozzle, it can also avoid damage to the converter flue and protect the flue.

Description

Technical Field

[0001] The present invention relates to the technical field of smelting equipment, and in particular to a guiding structure for installing an inserting gun barrel and an inserting gun barrel assembly. Background Art

[0002] The oxygen top-blown converter is one of the main equipment for waste heat recovery in the steelmaking workshop. An oxygen nozzle is installed on the furnace mouth flue of the converter. Some converter flues are also provided with auxiliary nozzles. The oxygen nozzle is the inserting gun barrel of the oxygen lance, and the auxiliary nozzle is the inserting gun barrel of the auxiliary lance. During the smelting process of the converter, the oxygen lance and the auxiliary lance need to be repeatedly lifted and lowered. The oxygen lance is inserted into the oxygen nozzle to inject oxygen into the converter, and the auxiliary lance is inserted into the auxiliary nozzle to measure the temperature and flue gas composition in the flue. Under the action of the oxygen lance jet, elements such as carbon, silicon, and manganese in the molten iron for smelting react with oxygen, generating a very high temperature while releasing a large amount of hot gas and dust. The oxygen lance and the auxiliary lance are repeatedly lifted and lowered through the oxygen nozzle and the auxiliary nozzle, and a large amount of steel slag carried accumulates at the oxygen nozzle and the auxiliary nozzle, causing the oxygen nozzle and the auxiliary nozzle to be easily damaged. After the flue operates for about half a year to one year, the oxygen nozzle and the auxiliary nozzle of the converter flue need to be regularly disassembled and replaced.

[0003] Specifically as Figure 1 、 Figure 2 shown, the oxygen nozzle 1' and the auxiliary nozzle 2' are detachably and fixedly connected to the converter flue 100 through a guard plate 200. The oxygen nozzle 1' and the auxiliary nozzle 2' are placed in the inclined section of the converter flue 100. The inclined section of the converter flue 100 is a cylinder. The center of the oxygen nozzle 1' is aligned with the center line of the converter. The auxiliary nozzle 2' is generally placed above the oxygen nozzle 1' and on one side of the center of the converter flue 100. During the disassembly and replacement of the oxygen nozzle 1' and the auxiliary nozzle 2', the centering center line of the oxygen nozzle 1' and the auxiliary nozzle 2' is on the side convex inclined surface of the converter flue 100, lacking a positioning mark. It is necessary to continuously adjust the installation positions of the new oxygen nozzle and the auxiliary nozzle to complete centering. The replacement of the oxygen nozzle and the auxiliary nozzle is time-consuming and laborious. Frequent disassembly is also likely to cause damage to the flue surface, resulting in poor sealing between the converter flue and the guard plate. Moreover, the oxygen nozzle and the auxiliary nozzle are near the furnace mouth, with a small space, high temperature, and a harsh working environment. Long-term replacement operations can also cause physical harm to the operators. Summary of the Invention

[0004] The purpose of the present invention is to provide a guiding structure for installing an inserting gun barrel and an inserting gun barrel assembly to solve the problem of inconvenient replacement of the oxygen nozzle and the auxiliary nozzle.

[0005] To achieve the above object, the present invention provides a guiding structure for installing an inserting gun barrel, which includes a positioning cylinder for the inserting gun barrel to be inserted into. The positioning cylinder is fixed on the outer wall of the converter flue. The central axis of the positioning cylinder coincides with the centering center line of the inserting gun barrel on the converter flue. The positioning cylinder is internally communicated with the converter flue, and a positioning member for coaxially positioning the positioning cylinder and the inserting gun barrel is provided on the positioning cylinder.

[0006] The guiding structure for installing an inserting gun barrel as described above, wherein the positioning member is a positioning ring. The central axis of the positioning ring coincides with the central axis of the positioning cylinder. A connecting ring is provided on the inserting gun barrel. The central axis of the connecting ring coincides with the central axis of the inserting gun barrel. The positioning ring and the connecting ring coaxially position the positioning cylinder and the inserting gun barrel through coaxial cooperation.

[0007] The guiding structure for installing an inserting gun barrel as described above, wherein at least three positioning holes are formed in the positioning ring. At least three of the positioning holes are annularly and evenly distributed around the central axis of the positioning ring. At least three connecting holes are formed in the connecting ring. At least three of the connecting holes are annularly and evenly distributed around the central axis of the connecting ring. The radial distance between each positioning hole and the central axis of the positioning ring is equal to the radial distance between each connecting hole and the central axis of the connecting ring. By aligning the positioning holes and the connecting holes one by one, the positioning ring and the connecting ring are coaxially positioned.

[0008] The guiding structure for installing an inserting gun barrel as described above, wherein an annular groove is provided on the positioning ring. The central axis of the annular groove coincides with the central axis of the positioning ring. An annular boss capable of cooperating with the annular groove is provided on the connecting ring. The central axis of the annular boss coincides with the central axis of the connecting ring. By inserting the annular boss into the annular groove, the positioning ring and the connecting ring are coaxially positioned.

[0009] The guiding structure for installing an inserting gun barrel as described above, wherein one end of the positioning cylinder is connected to the converter flue. The positioning ring is provided at the other end of the positioning cylinder. The connecting ring is provided on the outer wall of the inserting gun barrel. The other end of the positioning cylinder is coaxially positioned and connected to the inserting gun barrel through the positioning ring and the connecting ring.

[0010] The guiding structure for installing an inserting gun barrel as described above, wherein a labyrinth seal structure is provided between the positioning ring and the connecting ring for sealing.

[0011] The guiding structure for installing the inserted gun barrel as described above, wherein one or more sealing grooves are provided on the positioning ring, one or more sealing teeth are provided on the connecting ring, the sealing teeth are inserted into the sealing grooves and form the labyrinth sealing structure with the sealing grooves, and the bottom surfaces of the sealing grooves and the sealing teeth are both inclined surfaces.

[0012] The guiding structure for installing the inserted gun barrel as described above, wherein an annular baffle is provided on the inner wall of the positioning cylinder, the inner diameter of the annular baffle is smaller than the outer diameter of the inserted gun barrel, and the inner diameter of the annular baffle is greater than or equal to the inner diameter of the inserted gun barrel. In the state where the inserted gun barrel is inserted into the positioning cylinder, the inserted gun barrel abuts against the annular baffle, and the annular baffle separates the annular gap between the inserted gun barrel and the inner side wall of the positioning cylinder from the inner cavity of the inserted gun barrel.

[0013] The guiding structure for installing the inserted gun barrel as described above, wherein the side wall of the positioning cylinder is a wall tube structure for water cooling or steam cooling, or the side wall of the positioning cylinder is a solid wall plate made of high-temperature resistant material.

[0014] The present invention also provides an inserted gun barrel assembly, which includes an inserted gun barrel and the guiding structure described above. The inserted gun barrel is inserted into the positioning cylinder, the positioning member co-axially positions the positioning cylinder and the inserted gun barrel, and the inserted gun barrel is detachably connected to the positioning cylinder.

[0015] The features and advantages of the guiding structure for installing the inserted gun barrel and the inserted gun barrel assembly of the present invention are:

[0016] 1. When installing the inserted gun barrel (i.e., the oxygen nozzle or the auxiliary nozzle) using the guiding structure of the present invention, the inserted gun barrel does not directly align with the centering center line on the side convex slope of the converter flue, but indirectly aligns with the converter flue by aligning with the positioning cylinder. The alignment between the inserted gun barrel and the positioning cylinder has a positioning member as a positioning mark, which is more convenient for alignment, solves the problem that the existing technology needs to continuously adjust the installation position to complete the alignment when installing the oxygen nozzle and the auxiliary nozzle, makes the replacement of the oxygen nozzle and the auxiliary nozzle more convenient and fast. Since the guiding structure does not need to be removed from the converter flue when replacing the oxygen nozzle and the auxiliary nozzle, it can also avoid damage to the converter flue and protect the flue.

[0017] 2. By using the positioning ring as the positioning member in the present invention, it is not only convenient for the alignment of the inserted gun barrel and the positioning cylinder, but also convenient for connecting and sealing the inserted gun barrel and the positioning cylinder.

[0018] 3. By providing a labyrinth sealing structure between the positioning ring and the connecting ring in the present invention, the positioning cylinder and the inserted gun barrel can be sealed, preventing external air from being sucked into the converter flue with slightly negative pressure, avoiding potential safety hazards, and compared with the existing technology using steam sealing or nitrogen sealing, it can reduce the loss of energy media.

[0019] 4. By providing an annular baffle on the inner wall of the positioning cylinder, the invention separates the annular gap between the inserting gun barrel and the inner side wall of the positioning cylinder from the inner cavity of the inserting gun barrel, blocking the entry of flue gas and ash slag into the annular gap between the inserting gun barrel and the positioning cylinder, and prolonging the service life of the inserting gun barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following drawings are only intended to schematically illustrate and explain the present invention and do not limit the scope of the present invention. Among them:

[0021] Figure 1 is a schematic diagram of the installation of an oxygen nozzle and a sub-nozzle on a converter flue in the prior art;

[0022] Figure 2 is Figure 1 the side view in the direction of A in

[0023] Figure 3 is a schematic diagram of the guiding structure of an embodiment of the present invention;

[0024] Figure 4 is Figure 3 a schematic diagram of the cooperation between the guiding structure of

[0025] Figure 5 is Figure 4 the cross-sectional view along the line B-B in

[0026] Figure 6 is a schematic diagram of the cooperation between the guiding structure of another embodiment of the present invention and the inserting gun barrel;

[0027] Figure 7 is Figure 6 the cross-sectional view along the line C-C in

[0028] Figure 8 is a schematic diagram of another embodiment of the connecting ring;

[0029] Figure 9 is a schematic diagram of an embodiment of the positioning ring;

[0030] Figure 10 is a schematic diagram of another embodiment of the positioning ring;

[0031] Figure 11 is a schematic diagram of an embodiment of the positioning cylinder;

[0032] Figure 12 is a schematic diagram of an embodiment of the inserting gun barrel;

[0033] Figure 13 is a schematic diagram of another embodiment of the inserting gun barrel;

[0034] Figure 14It is a schematic diagram of an embodiment of a labyrinth seal structure;

[0035] Figure 15 It is a schematic diagram of another embodiment of a labyrinth seal structure;

[0036] Figure 16 It is a schematic diagram of the cooperation between the seal groove and the seal teeth of the labyrinth seal structure.

[0037] Description of main component numbers:

[0038] 1. Guide structure; 11. Positioning cylinder; 12. Positioning ring; 121. Positioning hole; 122. Seal groove;

[0039] 13. Annular baffle; 14. Cooling pipe; 141. Water inlet; 142. Water outlet;

[0040] 2. Insertion gun barrel; 21. Connection ring; 211. Connection hole; 212. Seal teeth;

[0041] 3. Bolt; 1'. Oxygen gun nozzle; 2'. Auxiliary gun nozzle; 100. Converter flue; 200. Guard plate. Specific implementation manners

[0042] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings. Among them, the use of the adjectival or adverbial modifiers "upper" and "lower", "top" and "bottom", "inner" and "outer" is only for the convenience of relative reference between multiple groups of terms, and does not describe any specific directional limitation on the modified terms.

[0043] Embodiment 1:

[0044] As Figure 3 , Figure 4 shown, for the convenience of description in this article, the oxygen gun nozzle and the auxiliary gun nozzle are collectively referred to as the insertion gun barrel. To solve the problem of inconvenient replacement of the insertion gun barrel, the present invention proposes a guide structure 1 for installing the insertion gun barrel. The guide structure 1 includes a positioning cylinder 11 for inserting the insertion gun barrel 2. The positioning cylinder 11 is fixed on the outer wall of the converter flue 100. The central axis of the positioning cylinder 11 coincides with the centering center line O of the insertion gun barrel 2 on the converter flue 100. The positioning cylinder 11 is internally connected to the converter flue 100. The positioning cylinder 11 is provided with a positioning member for coaxially positioning (i.e., centering) the positioning cylinder 11 and the insertion gun barrel 2. For example, the positioning member is the Figure 3 positioning ring 12 in, and by centering the insertion gun barrel 2 and the positioning cylinder 11, the insertion gun barrel 2 is centered with the centering center line O of the insertion gun barrel 2 on the converter flue 100.

[0045] In use, the guiding structure 1 of the present invention is fixed on the guard plate 200 on the outer wall of the converter flue 100, and the central axis of the positioning cylinder 11 coincides with the centering center line O of the lance barrel 2 on the converter flue 100. When installing the lance barrel 2, insert the lance barrel 2 into the positioning cylinder 11. The positioning member on the positioning cylinder 11 co-axially positions the positioning cylinder 11 and the lance barrel 2, thereby realizing the centering of the lance barrel 2 and the converter flue 100, which is more convenient for centering. When replacing the lance barrel 2, remove the old lance barrel 2 from the guiding structure 1, and then install the new lance barrel 2 on the guiding structure 1.

[0046] With the guiding structure 1 of the present invention, the lance barrel 2 does not directly center with the centering center line O on the side convex inclined surface of the converter flue 100, but indirectly realizes the centering with the converter flue 100 by centering with the positioning cylinder 11. The centering of the lance barrel 2 and the positioning cylinder 11 has a positioning member as a positioning mark, which is more convenient for centering, solves the problem in the prior art that the oxygen lance nozzle and the auxiliary lance nozzle need to continuously adjust the installation position to complete the centering, makes the replacement of the oxygen lance nozzle and the auxiliary lance nozzle more convenient and fast. Since the guiding structure 1 does not need to be removed from the converter flue 100 when replacing the oxygen lance nozzle and the auxiliary lance nozzle, it can also avoid damage to the converter flue 100 and protect the flue.

[0047] When the guiding structure 1 of the present invention is used to install the oxygen lance nozzle, the central axis of the positioning cylinder 11 coincides with the centering center line O1 of the oxygen lance nozzle on the converter flue 100 (O1 is the converter center line), as Figure 1 shown. When the guiding structure 1 of the present invention is used to install the auxiliary lance nozzle, the central axis of the positioning cylinder 11 coincides with the centering center line O2 of the auxiliary lance nozzle on the converter flue 100 (as Figure 1 shown).

[0048] As Figure 3 、 Figure 4 、 Figure 6 shown, in an embodiment of the present invention, the positioning member is a positioning ring 12. The central axis of the positioning ring 12 coincides with the central axis of the positioning cylinder 11. The lance barrel 2 is provided with a connecting ring 21. The central axis of the connecting ring 21 coincides with the central axis of the lance barrel 2. In the state where the lance barrel 2 is inserted into the positioning cylinder 11, the positioning ring 12 and the connecting ring 21 co-axially position the positioning cylinder 11 and the lance barrel 2 through coaxial cooperation, thereby centering the lance barrel 2 and the converter flue 100. This embodiment converts the side convex inclined surface of the converter flue 100 into the horizontal surface of the positioning ring 12, making centering easier.

[0049] As Figure 3 、 Figure 4As shown, specifically, one end of the positioning cylinder 11 is connected to the converter flue 100, and a positioning ring 12 is provided at the other end of the positioning cylinder 11. For example, the positioning ring 12 is fixed on the outer wall of the other end of the positioning cylinder 11. A connecting ring 21 is provided on the outer wall of the gun barrel 2 to be inserted. The other end of the positioning cylinder 11 is coaxially and positionally connected to the gun barrel 2 to be inserted through the positioning ring 12 and the connecting ring 21. During installation, the gun barrel 2 to be inserted is inserted from the other end of the positioning cylinder 11. When the connecting ring 21 on the outer wall of the gun barrel 2 to be inserted sits on the positioning ring 12 at the end of the positioning cylinder 11, the insertion is in place. Then, the connecting ring 21 and the positioning ring 12 are aligned, for example, by meshing and aligning the positioning ring 12 and the connecting ring 21, and the gun barrel 2 to be inserted is installed on the positioning cylinder 11.

[0050] As Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 As shown, in the first technical solution of this embodiment, at least three positioning holes 121 are provided on the positioning ring 12, and the at least three positioning holes 121 are evenly distributed in a ring around the central axis of the positioning ring 12. At least three connecting holes 211 are provided on the connecting ring 21, and the at least three connecting holes 211 are evenly distributed in a ring around the central axis of the connecting ring 21. The radial distance between each positioning hole 121 and the central axis of the positioning ring 12 is equal to the radial distance between each connecting hole 211 and the central axis of the connecting ring 21. By aligning the positioning holes 121 and the connecting holes 211 one by one, the positioning ring 12 and the connecting ring 21 are coaxially positioned. In this solution, the positioning holes 121 and the connecting holes 211 are used as positioning marks, and the centering operation is more convenient and fast.

[0051] For example, the number of positioning holes 121 is three (as Figure 10 shown) or four (as Figure 9 shown). Correspondingly, the number of connecting holes 211 is also three (as Figure 8 shown) or four (as Figure 7 shown). For the convenience of installation, the positioning holes 121 can be set as oblong holes penetrating the outer wall of the positioning ring 12 (as Figure 9 , Figure 10 shown), and the connecting holes 211 are set as round holes.

[0052] As Figure 6 shown, in this solution, the positioning hole 121 and the corresponding connecting hole 211 can be connected by a bolt 3 and fastened by a nut. Of course, a high-temperature resistant gasket can also be configured to connect the positioning cylinder 11 and the gun barrel 2 to be inserted. Therefore, the positioning hole 121 in this solution not only plays a positioning role but also a connecting role.

[0053] In the second technical solution of this embodiment, an annular groove is provided on the positioning ring 12, and the central axis of the annular groove coincides with the central axis of the positioning ring 12. An annular boss that can cooperate with the annular groove is provided on the connecting ring 21, and the central axis of the annular boss coincides with the central axis of the connecting ring 21. By embedding the annular boss into the annular groove, the positioning ring 12 and the connecting ring 21 are coaxially positioned. In this solution, the annular groove and the annular boss are used as positioning marks, making the centering operation more convenient and fast.

[0054] In this solution, in order to connect the positioning cylinder 11 and the insertion gun barrel 2, through holes for bolts to pass through can be respectively provided on the annular groove and the annular boss, so as to detachably connect the positioning cylinder 11 and the insertion gun barrel 2 by using bolts.

[0055] In this embodiment, the shape of the positioning ring 12 can be a circular ring or a square ring, and the annular groove can be a circular annular groove or a square annular groove.

[0056] In this embodiment, further, the connection between the positioning cylinder 11 and the insertion gun barrel 2 is realized through the connection between the positioning ring 12 and the connecting ring 21. The positioning ring 12 and the connecting ring 21 are sealed by a labyrinth seal structure, thereby sealing between the positioning cylinder 11 and the insertion gun barrel 2, preventing external air from being sucked into the inside of the converter flue 100 with a slight negative pressure, avoiding potential safety hazards, and being able to reduce the loss of energy media compared with the existing technology using steam seal or nitrogen seal.

[0057] As Figure 3 、 Figure 11 、 Figure 12 、 Figure 14 、 Figure 15 shown, furthermore, one or more sealing grooves 122 are provided on the positioning ring 12, and one or more sealing teeth 212 are provided on the connecting ring 21. The sealing teeth 212 are inserted into the sealing grooves 122 and form a labyrinth seal structure with the sealing grooves 122. The bottom surfaces of the sealing grooves 122 and the sealing teeth 212 are both inclined surfaces to facilitate the docking and installation of the positioning ring 12 and the connecting ring 21.

[0058] As Figure 16 shown, preferably, the inclination angle α of the bottom surface of the sealing groove 122 does not exceed 15°, and the inclination angle of the bottom surface of the sealing tooth 212 does not exceed 15°.

[0059] To further increase the tightness of the seal, asbestos ropes can also be placed inside the sealing grooves 122 to form an asbestos layer seal structure between the sealing grooves 122 and the sealing teeth 212.

[0060] Therefore, in this embodiment, the positioning ring 12 is used as the positioning part, which not only facilitates the centering of the insertion gun barrel 2 and the positioning cylinder 11, but also facilitates the connection and sealing of the insertion gun barrel 2 and the positioning cylinder 11.

[0061] As Figure 3 shown, in an embodiment of the present invention, the bottom surface of the positioning cylinder 11 is an inclined surface, so that the bottom surface of the positioning cylinder 11 can be fitted with the side convex inclined surface of the inclined section of the converter flue 100.

[0062] As Figure 3 , Figure 4 , Figure 6 shown, in an embodiment of the present invention, an annular baffle 13 is provided on the inner wall of the positioning cylinder 11. The inner diameter of the annular baffle 13 is smaller than the outer diameter of the gun barrel 2, and the inner diameter of the annular baffle 13 is greater than or equal to the inner diameter of the gun barrel 2. In the state where the gun barrel 2 is inserted into the positioning cylinder 11, the gun barrel 2 abuts against the annular baffle 13, and the annular baffle 13 closes the bottom of the annular gap between the gun barrel 2 and the inner side wall of the positioning cylinder 11, that is, the annular baffle 13 separates the annular gap from the inner cavity of the gun barrel 2 to block the entry of flue gas and ash into the annular gap between the gun barrel 2 and the positioning cylinder 11.

[0063] The shape of the annular baffle 13 is not limited to a circular ring shape, and its shape is the same as the bottom surface shape of the gun barrel 2.

[0064] As Figure 4 , Figure 5 shown, in an embodiment of the present invention, the side wall of the positioning cylinder 11 is a wall tube structure with water cooling or steam cooling function. The two ends of the wall tube of the wall tube structure are respectively a water inlet 141 and a water outlet 142. The wall tube extends along the axial direction of the positioning cylinder 11 and is connected to the upper and lower water distribution headers to form a circulating cooling water path, which can not only reduce the temperature of the cylinder wall of the positioning cylinder 11, but also recover the waste heat of the flue gas.

[0065] However, the present invention is not limited thereto. As Figure 6 , Figure 11 shown, in another embodiment of the present invention, the side wall of the positioning cylinder 11 can also be a solid wall plate made of high-temperature resistant material. Since the flue gas temperature at the converter mouth is as high as 800°C to 1600°C and the ambient temperature where the positioning cylinder 11 is located is relatively high, to prevent the positioning cylinder 11 from deforming at high temperature, the positioning cylinder 11 is preferably able to withstand a high temperature of more than 1600°C. For example, the material of the positioning cylinder 11 is cast iron or rare earth alloy. Of course, it can also be other existing high-temperature resistant materials.

[0066] Embodiment 2:

[0067] The present invention also provides an inserted gun barrel assembly, which includes an inserted gun barrel 2 and a guiding structure 1 for installing the inserted gun barrel 2. The guiding structure 1 in this embodiment has the same structure, working principle and beneficial effects as those in the first embodiment, and will not be elaborated herein; the inserted gun barrel 2 is an oxygen lance inserted gun barrel or a sublance inserted gun barrel. The inserted gun barrel 2 is inserted into the positioning cylinder 11, and the positioning member co-axially positions the positioning cylinder 11 and the inserted gun barrel 2, so as to align the inserted gun barrel 2 with the centering center line of the inserted gun barrel 2 on the converter flue 100. The inserted gun barrel 2 is detachably connected to the positioning cylinder 11 to facilitate the disassembly and assembly of the inserted gun barrel 2.

[0068] Specifically, a guard plate 200 is installed on the outer wall of the inclined section of the converter flue 100. If only an oxygen lance opening needs to be installed on the converter flue 100, a guiding structure 1 is installed on the guard plate 200, and the central axis of the positioning cylinder 11 of the guiding structure 1 coincides with the centering center line O1 of the oxygen lance opening on the converter flue 100 (as Figure 1 shown), and the oxygen lance inserted gun barrel is inserted into the positioning cylinder 11 of the guiding structure 1; if an oxygen lance opening and a sublance opening need to be installed on the converter flue 100, two guiding structures 1 are installed on the guard plate 200. The central axis of the positioning cylinder 11 of the first guiding structure 1 coincides with the centering center line O1 of the oxygen lance opening on the converter flue 100, and the central axis of the positioning cylinder 11 of the second guiding structure 1 coincides with the centering center line O2 of the sublance opening on the converter flue 100 (as Figure 1 shown), the oxygen lance inserted gun barrel is inserted into the positioning cylinder 11 of the first guiding structure 1, and the sublance inserted gun barrel is inserted into the positioning cylinder 11 of the second guiding structure 1.

[0069] As Figure 4 、 Figure 6 、 Figure 13 shown, further, the side wall of the inserted gun barrel 2 is a wall tube structure with water cooling or steam cooling function.

[0070] By providing the guiding structure 1 to connect the inserted gun barrel 2 and the converter flue 100, the present invention facilitates the replacement of the inserted gun barrel 2, the positioning of the new inserted gun barrel 2, saves the time for replacing the inserted gun barrel 2. Since the inserted gun barrel 2 does not directly contact the flue, it avoids scratching the flue wall surface when disassembling the inserted gun barrel 2, enhances the connection strength between the inserted gun barrel 2 and the moving section of the flue, and makes the inserted gun barrel 2 not shift in the center due to vibration, ensuring the normal operation of the oxygen lance and the sublance.

[0071] The above are only illustrative specific embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention. Moreover, it should be noted that the components of the present invention are not limited to the above overall applications. Each technical feature described in the specification of the present invention can be selected and used alone according to actual needs or multiple features can be combined for use. Therefore, the present invention naturally covers other combinations and specific applications related to the inventive points of this case.

Claims

1. A guiding structure for installing an inserting gun barrel, characterized in that, The guiding structure includes a positioning cylinder for inserting the lance barrel. The positioning cylinder is fixed on the outer wall of the converter flue. The central axis of the positioning cylinder coincides with the centering center line of the lance barrel on the converter flue. The positioning cylinder communicates with the inside of the converter flue. A positioning member for coaxially positioning the positioning cylinder and the lance barrel is provided on the positioning cylinder. The positioning member is a positioning ring. The central axis of the positioning ring coincides with the central axis of the positioning cylinder. A connecting ring is provided on the lance barrel. The central axis of the connecting ring coincides with the central axis of the lance barrel. The positioning ring and the connecting ring coaxialize and position the positioning cylinder and the lance barrel through coaxial cooperation to center the lance barrel and the converter flue. One end of the positioning cylinder is connected to the converter flue. The positioning ring is provided at the other end of the positioning cylinder. The connecting ring is provided on the outer wall of the lance barrel. The other end of the positioning cylinder is coaxialized and positioned with the lance barrel through the positioning ring and the connecting ring. Among them, the centering center line is on the side convex inclined surface of the converter flue, and the centering center line and the side convex inclined surface are inclined relative to each other, converting the side convex inclined surface of the converter flue into the horizontal surface of the positioning ring to make centering easier.

2. The guiding structure for installing an inserted gun barrel according to claim 1, characterized in that, At least three positioning holes are provided on the positioning ring. At least three positioning holes are evenly distributed in a ring around the central axis of the positioning ring. At least three connecting holes are provided on the connecting ring. At least three connecting holes are evenly distributed in a ring around the central axis of the connecting ring. The radial distance between each positioning hole and the central axis of the positioning ring is equal to the radial distance between each connecting hole and the central axis of the connecting ring. By aligning the positioning holes and the connecting holes one by one, the positioning ring and the connecting ring are coaxialized and positioned.

3. The guiding structure for installing an inserting gun barrel according to claim 1, characterized in that, An annular groove is provided on the positioning ring. The central axis of the annular groove coincides with the central axis of the positioning ring. An annular boss that can cooperate with the annular groove is provided on the connecting ring. The central axis of the annular boss coincides with the central axis of the connecting ring. By inserting the annular boss into the annular groove, the positioning ring and the connecting ring are coaxialized and positioned.

4. The guiding structure for installing an inserting gun barrel according to claim 1, characterized in that, The positioning ring and the connecting ring are sealed by a labyrinth seal structure.

5. The guiding structure for installing the plug barrel according to claim 4, characterized in that One or more sealing grooves are provided on the positioning ring. One or more sealing teeth are provided on the connecting ring. The sealing teeth are inserted into the sealing grooves and form the labyrinth seal structure with the sealing grooves. The bottom surfaces of the sealing grooves and the sealing teeth are both inclined surfaces.

6. The guiding structure for installing an inserting gun barrel according to any one of claims 1 to 5, characterized in that, An annular baffle is provided on the inner wall of the positioning cylinder. The inner diameter of the annular baffle is smaller than the outer diameter of the lance barrel and greater than or equal to the inner diameter of the lance barrel. In the state where the lance barrel is inserted into the positioning cylinder, the lance barrel abuts against the annular baffle. The annular baffle separates the annular gap between the lance barrel and the inner side wall of the positioning cylinder from the inner cavity of the lance barrel.

7. The guiding structure for installing an inserting gun barrel according to any one of claims 1 to 5, characterized in that, The side wall of the positioning cylinder is a wall tube structure for water cooling or steam cooling, or the side wall of the positioning cylinder is a solid wall plate made of high-temperature resistant material.

8. An inserted gun barrel assembly, characterized in that, The inserted gun barrel assembly includes an inserted gun barrel and the guiding structure according to any one of claims 1 to 7. The inserted gun barrel is inserted into the positioning cylinder, the positioning member coaxially positions the positioning cylinder and the inserted gun barrel, and the inserted gun barrel is detachably connected to the positioning cylinder.

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