Safety protection device for oxygen lance supporting seat of furnace door of electric furnace

Abstract

The utility model relates to the technical field of electric furnace steelmaking, and mainly discloses an electric furnace door oxygen lance supporting seat safety protection device which comprises an iron shell, the upper end and the lower end of the iron shell are open, and a fire-resistant asbestos material heat insulation layer and an annular stainless steel thin water pipe are arranged on the inner wall of a cavity of the iron shell. The annular stainless steel thin water pipe is located on the inner side of the fireproof asbestos material heat insulation layer and communicated with the water inlet pipeline and the water outlet pipeline, the supporting rotating column is located in a cavity of the iron shell, the oxygen lance fixing frame is arranged above the supporting rotating column, and the furnace door oxygen lance is installed on the oxygen lance fixing frame. According to the utility model, effective cooling of the bearing in the support rotating column of the electric furnace door oxygen lance can be well realized, and cooling water is sealed and does not leak, so that the damage of poor lubrication of the bearing in the support rotating column caused by long-term high-temperature baking is avoided, and the conditions of moist furnace door area and water accumulation in a lower steel slag chamber are thoroughly eliminated; the operation safety coefficient is improved, and potential safety hazards are eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of electric furnace steelmaking, in particular to a safety protection device for an oxygen lance support seat of an electric furnace door. Background Art

[0002] The oxygen lance for the electric furnace door is one of the important equipment for electric furnace steelmaking. The support seat of the oxygen lance for the furnace door is located near the furnace door. The supporting rotating column is the main component of the support seat. The working environment temperature is high. If the supporting rotating column is not cooled, long-term high-temperature baking will cause poor lubrication and damage to the internal bearing, thus affecting the normal use of the oxygen lance for the furnace door.

[0003] In the prior art, an external spray water pipe is generally used to spray water to cool the supporting rotating column, but there are the following technical problems during use: First, the electric furnace platform area is humid or even waterlogged. Long-term humidity and waterlogging will cause corrosion of the platform steel plate and the supporting structure, reducing the safety of the electric furnace platform structure. Secondly, poor control of the spray water flow rate can easily cause water accumulation and explosion accidents in the slag discharge chamber at the lower part of the furnace door, forming a major safety hazard in the molten metal operation area. Finally, external spray water also causes a waste of water resources. Utility Model Content

[0004] The utility model aims to provide a safety protection device for an oxygen lance support seat of an electric furnace door, so as to solve the technical problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a safety protection device for an electric furnace door oxygen gun support seat, comprising an iron shell, the upper and lower ends of the iron shell are provided with openings, a refractory asbestos material insulation layer is provided on the inner wall of the iron shell cavity, an annular stainless steel capillary water pipe is installed on the inner wall of the iron shell cavity, the annular stainless steel capillary water pipe is located on the inner side of the refractory asbestos material insulation layer, the water inlet end and the water outlet end of the annular stainless steel capillary water pipe are respectively connected to the water inlet pipe and the water outlet pipe, the supporting rotating column is located from the opening above the iron shell to the cavity of the iron shell, the oxygen gun fixing frame is arranged above the supporting rotating column, and the furnace door oxygen gun is installed on the oxygen gun fixing frame.

[0006] Through the above technical scheme, the coolant is transported to the annular stainless steel capillary water pipe through the water inlet pipe and the water outlet pipe to circulate inside the iron shell. The coolant inside the annular stainless steel capillary water pipe effectively cools the bearing inside the supporting rotating column and the coolant is sealed and does not leak out, thereby preventing the internal bearing of the supporting rotating column from being subjected to high-temperature baking for a long time, resulting in poor lubrication and damage to the internal bearing, which affects the normal use of the furnace door oxygen gun; in addition, the moisture in the furnace door area and the water accumulation in the lower slag chamber are completely eliminated, thereby improving the operating safety factor and eliminating safety hazards.

[0007] A further solution of the utility model is that the water inlet end and the water outlet end of the annular stainless steel water pipe are connected to the water inlet pipe and the water outlet pipe respectively through quick connectors. The quick connectors can realize quick connection of the pipes, which is convenient for rapid installation of the protective device after moving the position.

[0008] A further solution of the utility model is that a control valve is provided on the water inlet end of the annular stainless steel capillary water pipe connected to the water inlet pipe.

[0009] A further solution of the utility model is that the iron shell includes two semi-cylindrical iron shells, both side edges of the two semi-cylindrical iron shells are provided with corresponding positioning nuts, and the positioning nuts are connected and fixed by positioning screws.

[0010] A further solution of the utility model is that lifting parts are symmetrically arranged on both sides of the arc-shaped side wall in the middle of the iron shell to facilitate the movement of the protective device.

[0011] A further solution of the utility model is that the annular stainless steel water pipe and the fire-resistant asbestos insulation layer are both installed on the inner wall of the iron shell through anchor nails. The two semi-cylindrical iron shells facilitate the installation of the fire-resistant asbestos insulation layer and the anchor nails.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model has a simple structure, low cost and reliable operation. The utility model circulates cooling water in an annular stainless steel fine water pipe, and the annular stainless steel fine water pipe is used as a cold source to cool the supporting rotating column. The refractory asbestos material insulation layer isolates the heat of the electric furnace, which can effectively cool the internal bearing of the supporting rotating column of the electric furnace door oxygen gun and seal the cooling water without leaking. The internal bearing of the supporting rotating column is prevented from being damaged by poor lubrication due to long-term high-temperature baking, which affects the normal use of the furnace door oxygen gun. The humidity in the furnace door area and the water accumulation in the lower slag chamber are completely eliminated, thereby improving the operation safety factor and eliminating safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of the overall structure of the protection device of the utility model;

[0016] Figure 2 This is a top view of the protective device structure of the utility model;

[0017] Figure 3 This is a cross-sectional view of the protective device structure of the utility model.

[0018] In the figure: 1. iron shell, 2. opening, 3. arc-shaped side wall, 4. positioning nut, 5. positioning screw, 6. anchor nail, 7. refractory asbestos material insulation layer, 8. annular stainless steel water pipe, 9. quick connector, 10. water inlet pipe, 11. water outlet pipe, 12. control valve, 13. lifting part, 14. supporting rotating column, 15. furnace door oxygen gun, 16. oxygen gun fixing bracket. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example 1

[0021] like Figure 1-3 As shown, a safety protection device for an oxygen gun support seat of an electric furnace door includes an iron shell 1, wherein the iron shell 1 includes two semi-cylindrical iron shells 1, and the material of the iron shell 1 can preferably be stainless steel. Both side edges of the two semi-cylindrical iron shells 1 are provided with corresponding positioning nuts 4, and the positioning nuts 4 are vertically welded to the middle of the side of the semi-cylindrical iron shells 1, and the positioning nuts 4 are connected and fixed after passing through the two corresponding positioning nuts through the positioning screw 5.

[0022] The upper and lower ends of the iron shell 1 are provided with openings 2, and the inner wall of the cavity of the iron shell 1 is provided with a refractory asbestos material insulation layer 7. An annular stainless steel water pipe 8 is installed on the inner wall of the cavity of the iron shell 1. The annular stainless steel water pipe 8 is a coil, and the annular stainless steel water pipe 8 is located on the inner side of the refractory asbestos material insulation layer 7.

[0023] The annular stainless steel water pipe 8 and the fire-resistant asbestos insulation layer 7 are both installed on the inner wall of the iron shell 1 through anchor nails 6. The anchor nails 6 are evenly laid on the single semi-cylindrical iron shell 1, and then the fire-resistant asbestos insulation layer 7 is fixed, and the annular stainless steel water pipe 8 is laid between the anchor nails 6. The two semi-cylindrical iron shells 1 are for the convenience of installing the fire-resistant asbestos insulation layer 7 and the anchor nails 6.

[0024] The water inlet and outlet ends of the annular stainless steel water pipe 8 in each semi-cylindrical iron shell 1 are respectively connected to the water inlet pipe 10 and the water outlet pipe 11. The supporting rotating column 14 is located in the cavity of the iron shell 1 from the opening 2 above the iron shell 1. The oxygen gun fixing frame 16 is arranged above the supporting rotating column 14, and the furnace door oxygen gun 15 is installed on the oxygen gun fixing frame 16.

[0025] The structure of the electric furnace door oxygen gun involved in the utility model refers to a furnace door oxygen gun manipulator disclosed in Chinese utility model conversion patent CN204455181U, the supporting rotating column 14 is equivalent to the assembly of the chassis, the chassis bearing and the base, the oxygen gun fixing frame 16 is equivalent to the guide wheel bracket, and the furnace door oxygen gun 15 is equivalent to the assembly of the rotating arm and the oxygen gun mounting arm. The function of the utility model is to cool the bearing in the electric furnace door oxygen gun, and it is also suitable for any electric furnace door oxygen gun structure with bearings.

[0026] Example 2

[0027] For ease of use, this embodiment is based on embodiment 1, and a further solution is that the water inlet end and the water outlet end of the annular stainless steel water pipe 8 are respectively connected to the water inlet pipe 10 and the water outlet pipe 11 through a quick connector 9, and the quick connection of the pipes can be achieved through the quick connector, which is convenient for the quick installation of the protection device after the position is moved. A control valve 12 is provided on the water inlet end of the annular stainless steel water pipe 8 connected to the water inlet pipe 10 to control the opening and closing of the water inlet end.

[0028] In the middle of the iron shell 1, lifting parts 13 are symmetrically arranged on both sides of the arc-shaped side walls 3 of the two semi-cylindrical iron shells 1 to facilitate the movement of the protection device.

[0029] How it works:

[0030] First, assemble the protection device. Place two semi-circular iron sheets vertically, then drill holes evenly on the iron sheets, lay the refractory asbestos insulation layer 7, insert the anchor nail 6, and then lay the annular stainless steel water pipe 8. The water inlet end of the annular stainless steel water pipe 8 is located at the upper end of the semi-cylindrical iron shell 1, and the water outlet end of the annular stainless steel water pipe 8 is located at the lower end of the semi-cylindrical iron shell 1. Each semi-cylindrical iron shell 1 is made of two semi-circular iron sheets of different diameters. The two ends and sides of the semi-cylindrical iron shell 1 are welded with iron plates for sealing, and the anchor nail 6, the refractory asbestos insulation layer 7 and the annular stainless steel water pipe 8 are sealed in the interlayer of the semi-cylindrical iron shell 1. Weld positioning nuts 4 on both sides of each semi-cylindrical iron shell 1, and weld a lifting part 13 on the arc side wall 3 of the semi-cylindrical iron shell 1. The lifting part 13 is an iron handle.

[0031] Assemble two semi-cylindrical iron shells 1, align the positioning nuts 4, and then insert the screw to fix them. The two semi-cylindrical iron shells 1 form a hollow cylindrical iron shell 1 with openings 2 at both ends. Wrap the supporting rotating column 14 in the hollow interior of the iron shell 1, and then connect the water inlet and outlet ends of the annular stainless steel water pipe 8 to the water inlet pipe 10 and the water outlet pipe 11 through quick-connect joints. Open the control valve 12 at the water inlet end, inject coolant into the annular stainless steel water pipe 8 and circulate it. The coolant will effectively cool the bearings inside the supporting rotating column 14.

[0032] Through the above technical scheme, the coolant is transported to the annular stainless steel capillary water pipe 8 through the water inlet pipe 10 and the water outlet pipe 11 to circulate inside the iron shell 1. The coolant inside the annular stainless steel capillary water pipe 8 effectively cools the bearing inside the supporting rotating column 14 and the coolant is sealed and does not leak out, thereby preventing the internal bearing of the supporting rotating column 14 from being subjected to high-temperature baking for a long time, resulting in poor lubrication and damage to the internal bearing, thereby affecting the normal use of the furnace door oxygen gun; in addition, the moisture in the furnace door area and the water accumulation in the lower slag chamber are completely eliminated, thereby improving the operating safety factor and eliminating safety hazards.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A safety protection device for an oxygen lance support seat of an electric furnace door, characterized in that: The invention comprises an iron shell (1), wherein the upper and lower ends of the iron shell (1) are provided with openings (2), the inner wall of the cavity of the iron shell (1) is provided with a refractory asbestos material insulation layer (7), an annular stainless steel water pipe (8) is installed on the inner wall of the cavity of the iron shell (1), the annular stainless steel water pipe (8) is located on the inner side of the refractory asbestos material insulation layer (7), the water inlet end and the water outlet end of the annular stainless steel water pipe (8) are respectively connected to the water inlet pipe (10) and the water outlet pipe (11), a supporting rotating column (14) is located from the opening (2) above the iron shell (1) into the cavity of the iron shell (1), an oxygen gun fixing frame (16) is arranged above the supporting rotating column (14), and a furnace door oxygen gun (15) is installed on the oxygen gun fixing frame (16).

2. The safety protection device for the oxygen lance support seat of an electric furnace door according to claim 1 is characterized in that: The water inlet end and the water outlet end of the annular stainless steel water pipe (8) are respectively connected to the water inlet pipe (10) and the water outlet pipe (11) through a quick connector (9).

3. The safety protection device for the oxygen lance support seat of an electric furnace door according to claim 2 is characterized in that: A control valve (12) is provided on the water inlet end of the annular stainless steel water pipe (8) which is connected to the water inlet pipeline (10).

4. The safety protection device for the oxygen lance support seat of an electric furnace door according to claim 3 is characterized in that: The iron shell (1) comprises two semi-cylindrical iron shells (1), and both side edges of the two semi-cylindrical iron shells (1) are provided with corresponding positioning nuts (4), and the positioning nuts (4) are connected and fixed by positioning screws (5).

5. The safety protection device for the oxygen lance support seat of an electric furnace door according to claim 4 is characterized in that: Lifting portions (13) are symmetrically arranged on both sides of the arc-shaped side wall (3) in the middle of the iron shell (1).

6. The safety protection device for the oxygen lance support seat of an electric furnace door according to claim 5, characterized in that: The annular stainless steel water pipe (8) and the fire-resistant asbestos insulation layer (7) are both installed on the inner wall of the iron shell (1) through anchor nails (6).

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