CN212581951U

CN212581951U - Oxygen lance protection device

Info

Publication number: CN212581951U
Application number: CN202020345300.4U
Authority: CN
Inventors: 王冬福
Original assignee: Guangxi Guigang Iron And Steel Group Co ltd
Current assignee: Guangxi Guigang Iron And Steel Group Co ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2021-02-23
Anticipated expiration: 2030-03-18

Abstract

The utility model relates to the technical field of electric arc furnace steelmaking equipment, and discloses an oxygen lance protection device, which comprises a shell and a fixed plate fixedly connected with the shell, wherein the fixed plate is welded on the outer side of an oxygen lance steel shell and is positioned at the upper part of the oxygen lance, and the shell is a tapered shell; this oxygen rifle protection device has adopted and has taken the tapering casing alone to adopted the mode of installing on oxygen rifle upper portion, prevented that the oxygen rifle from being pounded, be more difficult to damage than installing around the oxygen rifle, the cost is lower, and is stronger to the guard action of oxygen rifle, is favorable to reducing electric arc furnace hot dead time, improves electric arc furnace technical and economic index, reduces electric arc furnace manufacturing cost.

Description

Oxygen lance protection device

Technical Field

The utility model relates to an electric arc furnace steelmaking equipment technical field, concretely relates to oxygen rifle protection device.

Background

The electric arc furnace steelmaking technology of our country has been widely popularized everywhere, and electric arc furnaces are generally equipped with furnace wall oxygen lances, and furnace wall oxygen lances are generally equipped with water-cooling copper plates as protection devices, and the water-cooling copper plates function includes that the oxygen lances are prevented from being stained with steel and slag, and the oxygen lances are prevented from being broken by smashing. Water leakage is easy to occur in the use process of the water-cooled copper plate, accidents such as explosion in the furnace and the like occur after water leakage, the oxygen lance on the furnace wall cannot be replaced, and even the heat production stops or the economic indexes of the production technology slide down.

Through long-time research, the applicant develops an oxygen lance protection device which can be arranged above an oxygen lance and prevent the oxygen lance from being damaged by smashing, and the oxygen lance protection device has the advantages of low cost, easy replacement and durability.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide an oxygen rifle protection device, this oxygen rifle protection device have adopted and have taken the tapering casing alone to adopted the mode of installing on oxygen rifle upper portion, prevented that the oxygen rifle from being pounded, be more difficult to damage than installing around the oxygen rifle, the cost is lower, and is stronger to the guard action of oxygen rifle, is favorable to reducing electric arc furnace heat downtime, improves electric arc furnace technical and economic index, reduces electric arc furnace manufacturing cost.

In order to achieve the above object, the present invention provides the following technical solutions:

an oxygen lance protection device comprises a shell and a fixing plate fixedly connected with the shell, wherein the fixing plate is welded on the outer side of a steel shell of an oxygen lance and is positioned at the upper part of the oxygen lance, and the shell is a tapered shell.

Preferably, the angle between the shell and the center line is 0-3 degrees.

Preferably, a water cooling channel is arranged in the shell.

Preferably, the number of the water cooling channels is two, and the two water cooling channels are arranged in mirror symmetry relative to the center line of the shell.

Preferably, the water-cooling channel comprises a water inlet channel and a water outlet channel, the water inlet channel is close to the center of the shell, and the water inlet channel and the water outlet channel are divided by a water-stop sheet.

Preferably, the fixing plate is provided with bolt holes and is fixed on the furnace body through bolts.

Preferably, the shell and the fixing plate are made of steel or copper and are produced by casting and welding.

Compared with the prior art, the beneficial effects of the utility model are that:

the oxygen lance protection device of the utility model adopts the shell with the taper independently, cancels the use of the water-cooling copper plate, can solve the problem that the lower part of the water-cooling copper plate is easy to leak water, and reduces various accidents caused by the damage of the water-cooling copper plate;

meanwhile, the mode of installing the oxygen lance on the upper part is adopted, the oxygen lance is prevented from being broken by smashing, the damage is more difficult than the installation of the oxygen lance on the periphery, the cost is lower, the protection effect on the oxygen lance is stronger, the reduction of the thermal shutdown time of the electric arc furnace is facilitated, the technical and economic indexes of the electric arc furnace are improved, and the production cost of the electric arc furnace is reduced.

Drawings

FIG. 1 is a schematic structural view of an oxygen lance protection device according to this embodiment.

In the drawings: 1-shell, 2-fixing plate, 201-bolt hole, 3-water inlet channel, 301-water inlet, 4-water outlet channel, 401-water return port and 5-water-stop plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, a preferred embodiment of the present invention provides an oxygen lance protection device, comprising a housing 1 and a fixing plate 2 fixedly connected to the housing 1, wherein the fixing plate 2 is welded to an outer side of a steel shell of the oxygen lance and located at an upper portion of the oxygen lance, so as to prevent the oxygen lance from being broken by impact, and the oxygen lance protection device is less likely to be damaged than the oxygen lance protection device installed around the oxygen lance, has a lower cost, and has a stronger protection effect on the oxygen lance;

the shell 1 is a tapered shell and is attached to an oxygen lance, so that a water-cooling copper plate is omitted, the problem that water is easy to leak from the lower part of the water-cooling copper plate is effectively solved, and various accidents caused by damage of the water-cooling copper plate are reduced.

In the embodiment, the included angle between the shell 1 and the central line is 0-3 degrees, and the included angle is selected according to the taper oxygen lance to be protected actually.

In this embodiment, be equipped with two water-cooling passageways in casing 1, two the water-cooling passageway for the central line of casing 1 is mirror symmetry and sets up, the water-cooling passageway includes intake channel 3 and outlet channel 4, intake channel 3 is close to the center of casing 1, outlet channel 4 branch is located on both sides, just intake channel 3 with outlet channel 4 is cut apart through water-stop sheet 5, and the linkage segment passes through the circular arc water course and connects to form the water-cooling passageway of accomplishing, just the external comdenstion water inlet end of water inlet 301 of intake channel 3, outlet channel 4's return water mouth 401 comdenstion water return end.

In the present embodiment, the fixing plate 2 is provided with bolt holes 201 and fixed to the furnace body by bolts.

In the present embodiment, the housing 1 and the fixing plate 2 are made of steel or copper, and are manufactured by casting and welding, so that the cost is low, the replacement is easy, and the device is more durable.

The working principle is as follows:

welding a fixing plate 2 on the outer side of the steel shell of the oxygen lance and on the upper part of the oxygen lance, and fixing the fixing plate 2 on a furnace body through bolts; the oxygen lance protection device forms two condensed water loops by two groups of water inlets 301, water inlet channels 3, water outlet channels 4 and water return ports 401,

the oxygen lance protection device adopts the mode of independently mounting on the upper part of the oxygen lance, prevents the oxygen lance from being broken by smashing, is not easy to damage than the oxygen lance, has lower cost and stronger protection effect on the oxygen lance, is favorable for reducing the thermal shutdown time of the electric arc furnace, improves the technical and economic indexes of the electric arc furnace, and reduces the production cost of the electric arc furnace.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.

Claims

1. An oxygen lance protection device is characterized by comprising a shell (1) and a fixing plate (2) fixedly connected with the shell (1), wherein the fixing plate (2) is welded on the outer side of a steel shell of an oxygen lance and is positioned at the upper part of the oxygen lance, and the shell (1) is a tapered shell.

2. An oxygen lance protection device according to claim 1 wherein the angle between the housing (1) and the centre line is 0-3 degrees.

3. An oxygen lance protection device according to claim 1, characterized in that a water cooling channel is provided in the housing (1).

4. An oxygen lance protection device according to claim 3, characterized in that the number of the water cooling channels is two, and the two water cooling channels are arranged in mirror symmetry with respect to the center line of the housing (1).

5. An oxygen lance protection device according to claim 3 characterized in that the water cooling channel comprises an inlet channel (3) and an outlet channel (4), the inlet channel (3) is near the center of the housing (1), the inlet channel (3) and the outlet channel (4) are separated by a water stop plate (5).

6. An oxygen lance protection device as claimed in claim 1, wherein the fixing plate (2) is provided with bolt holes (201) for fixing on the furnace body by bolts.

7. An oxygen lance protection device according to claim 1, characterized in that the housing (1) and the fixing plate (2) are made of steel or copper and are produced by casting and welding.