CN112813224A

CN112813224A - Gas spray gun and electric furnace

Info

Publication number: CN112813224A
Application number: CN201911126977.7A
Authority: CN
Inventors: 周敏杰; 叶政英
Original assignee: JIANGSU SUZHOU STEEL GROUP CO Ltd; Suzhou Suxin Special Steel Co ltd; Peking University Founder Group Co Ltd
Current assignee: JIANGSU SUZHOU STEEL GROUP CO Ltd; Suzhou Suxin Special Steel Co ltd; Peking University Founder Group Co Ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2021-05-18

Abstract

The invention relates to the technical field of electric furnaces, and particularly provides a gas spray gun and an electric furnace, wherein the gas spray gun comprises: the sleeve is connected with the furnace shell; the spray gun body penetrates through the sleeve and extends into the furnace shell, and a gap is formed between the spray gun body and the sleeve; the movable limiting part is suitable for being embedded into or separated from the gap; when the movable limiting part is embedded into the gap, the movement of the spray gun body is limited, and when the movable limiting part is separated from the gap, the spray gun body is suitable for sliding in the sleeve along the axial direction. The electric furnace comprises a mounting hole and a gas spray gun, wherein the mounting hole is formed in the furnace shell, and the gas spray gun is connected with the furnace shell through the mounting hole. The invention can adjust the position of the gas spray gun extending into the furnace shell in time according to different requirements of the electric furnace on the position of the oxygen lance in the early stage, the middle stage and the later stage of the furnace service, thereby ensuring the continuous production and improving the production quality.

Description

Gas spray gun and electric furnace

Technical Field

The invention relates to the technical field of electric furnaces, in particular to a gas spray gun and an electric furnace.

Background

Oxygen lances arranged on the side wall of the furnace shell of the electric furnace are indispensable technical equipment of the electric furnace, and each electric furnace is generally provided with more than four oxygen lances. The performance of the oxygen lance directly influences the running stability and the working efficiency of the electric furnace. The installation mode of the oxygen lance on the side wall of the electric furnace is that a copper block is generally installed on the side wall of the electric furnace, a cooling water channel and a through hole are arranged in the copper block, a lance rod of the oxygen lance penetrates through the through hole, and the lance rod of the oxygen lance needs to be tightly matched with the inner wall of the through hole to ensure heat transfer and cooling. The related technology has the defects that the position of the oxygen lance relative to the electric furnace is fixed, and the position of the oxygen lance in the electric furnace can not be timely adjusted according to the campaign time.

Disclosure of Invention

The present invention is directed to solving at least one of the above problems.

To this end, a first object of the present invention is to provide a gas lance.

A second object of the invention is to provide an electric furnace.

To achieve the first object of the present invention, an embodiment of the present invention provides a gas lance provided on a furnace shell of an electric furnace, including: the sleeve is connected with the furnace shell; the spray gun body penetrates through the sleeve and extends into the electric furnace, and a gap is formed between the spray gun body and the sleeve; the movable limiting part is suitable for being embedded into or separated from the gap; when the movable limiting part is embedded into the gap, the movement of the spray gun body is limited, and when the movable limiting part is separated from the gap, the spray gun body is suitable for sliding in the sleeve along the axial direction.

When activity locating part embedding clearance, all offset with sleeve pipe and spray gun body, therefore the removal of spray gun body is restricted, and when activity locating part breaks away from the clearance, the spray gun body is suitable for and follows the axial slip in the sleeve pipe, treats that the spray gun body slides to suitable position, again with activity locating part embedding clearance to the removal of restriction spray gun body. Therefore, the gas spray gun can timely adjust the position of the oxygen lance in the electric furnace according to the service time of the furnace, thereby improving the working efficiency of the electric furnace.

In addition, the technical scheme provided by the invention can also have the following additional technical characteristics:

in the above technical solution, the movable limiting part includes: a contact surface of the spray gun body; a sleeve contact surface that cooperates with the lance body contact surface to define a wedge-shaped structure that includes an included angle end; when the movable limiting part is embedded into the gap, the contact surface of the spray gun body is abutted against the spray gun body, the contact surface of the sleeve is abutted against the sleeve, and the included angle end extends into the gap.

The contact surface of the spray gun body and the contact surface of the sleeve respectively abut against the spray gun body and the sleeve to extrude the spray gun body, so that the movement of the spray gun body can be limited. The wedge-shaped structure with the included angle end extends into the gap and has the function of fine adjustment of the spray gun body after limited movement. The gas lance may loosen during use, for example, when the gas lance is inclined, the gas lance may have a tendency to move axially under the influence of its own weight. When the thickness of the part of the movable limiting piece inserted into the gap is changed, the movable limiting piece can keep extruding the spray gun body at any time, and therefore the movement of the spray gun body is limited.

In any of the above technical solutions, the positioning device includes a fixed limiting member disposed on an inner wall of the sleeve; when the movable limiting part is embedded into the gap, the movable limiting part and the fixed limiting part are respectively abutted against the spray gun body.

Set up fixed locating part on the sheathed tube inner wall to play the effect of support to the spray gun body, and form the clearance between spray gun body and the sleeve pipe.

In any of the above technical solutions, the number of the movable limiting pieces is one or more; the number of the fixed limiting parts is one or more; when the activity locating part imbeds during the clearance, the activity locating part with fixed locating part is along circumference around spray gun body equidistance distributes.

The movable limiting parts and the fixed limiting parts are distributed around the spray gun body at equal intervals, so that the spray gun body is more stable in structure when limited to move.

In any of the above technical solutions, the device comprises a notch groove, wherein the notch groove is arranged on the sleeve; the movable limiting part slides along the gap groove in the direction close to the furnace shell to be embedded into the gap, and the movable limiting part slides along the gap groove in the direction far away from the furnace shell to be separated from the gap.

The movable limiting part is inserted into the gap between the inner wall of the sleeve and the rod body from the gap groove, so that the plugging and the unplugging are easier.

The notch groove is arranged at one end of the sleeve far away from the furnace shell.

The gap groove is arranged at the end part, so that the movable limiting part is easier to operate.

In any of the above technical solutions, the flexible connector is included; one end of the flexible connecting piece is connected with the movable limiting piece, and the other end of the flexible connecting piece is connected with at least one of the furnace shell and the sleeve.

The movable limiting part is connected with a flexible connecting piece, the free end of the flexible connecting piece can be connected with the sleeve or connected with a peripheral fixed object, and therefore the movable limiting part can be operated more conveniently.

In any of the above technical solutions, the furnace comprises a supporting member disposed between the casing and the furnace shell; wherein the sleeve is connected with the furnace shell through the supporting piece.

The support piece plays the effect of support and fixed to the sleeve pipe.

In any one of the above technical solutions, the spray gun body includes: the gun head extends into the furnace shell; the gun rod comprises an inner layer gun barrel, a middle layer gun barrel and an outer layer gun barrel which are sequentially arranged from inside to outside; the extension bar is arranged between the gun head and the gun rod and comprises an inner layer extension pipe, a middle layer extension pipe and an outer layer extension pipe which are sequentially arranged from inside to outside;

the gun comprises a gun rod, an extension rod, a gun head, an inner layer gun barrel, a middle layer gun barrel, an outer layer gun barrel and an outer layer gun barrel, wherein the inner layer gun barrel is communicated with the inner layer extension tube, the middle layer gun barrel is communicated with the middle layer extension tube, and the outer layer gun barrel is communicated with the outer layer extension tube, so that at least one of a gas medium and a liquid medium flows in the gun rod, the extension rod and the gun head.

To achieve the second object of the present invention, an embodiment of the present invention provides an electric fire including: a furnace shell; the mounting hole is arranged on the furnace shell; the gas spray gun of any embodiment of the invention is arranged on the furnace shell and extends into the electric furnace through the mounting hole. The electric furnace provided by the embodiment of the invention comprises the gas lance of any embodiment of the invention, so that the electric furnace has all the beneficial effects of the gas lance of any embodiment of the invention, and the details are not repeated.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic view, partly in section, of a gas lance according to an embodiment of the invention in use;

FIG. 2 is a schematic view of a gas spray gun according to an embodiment of the present invention in the direction A-A (in which a fixed position-limiting member and two movable position-limiting members are provided);

FIG. 3 is a schematic view of a gas lance according to an embodiment of the present invention in the direction A-A (in which two fixed position limiters and one movable position limiter are provided);

FIG. 4 is a schematic view of a gas lance according to an embodiment of the present invention in the direction A-A (in which two fixed position limiters and two movable position limiters are provided);

FIG. 5 is a schematic perspective view of an electric fire according to one embodiment of the present invention;

fig. 6 is a schematic sectional view of a gas torch according to an embodiment of the present invention.

Wherein, the corresponding relation between the reference numbers and the component names in the drawings is as follows:

100: gas lance, 110: a sleeve, 120: spray gun body, 122: inner wall, 124: lance tip, 126: gun shaft, 1262: inner barrel, 1264: middle barrel, 1266: outer barrel, 128: extension bar, 1282: an extension pipe at the inner layer; 1284: middle layer lengthening tube, 1286: outer extension tube, 130: gap, 140: movable limiting part, 142: lance body contact surface, 144: bushing interface, 146: wedge structure, 148: included angle end, 150: fixed limit part, 160: notch groove, 170: flexible connector, 180: support, 200: an electric furnace, 210: furnace shell, 220: and (7) installing holes.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The technical solutions of some embodiments of the present invention are described below with reference to the accompanying drawings.

Example 1:

as shown in fig. 1 and 2, the present embodiment provides a gas torch 100, and the gas torch 100 is used in cooperation with an electric furnace 200, and is installed on a side wall of a furnace casing 210 of the electric furnace 200 so that the gas torch 100 is inserted into a position inside the furnace casing 210 according to the pre-stage, the middle stage and the post-stage of the electric furnace campaign.

The gas lance 100 for the furnace shell 210 side wall may be, for example, an oxygen lance, an inert gas lance, or the like. The oxygen lance is a tubular device with a high-pressure water cooling protection system, can extend into a furnace shell 210, and blows high-pressure high-purity oxygen into the furnace shell 210 above a molten pool at supersonic speed, a lance rod of the oxygen lance penetrates through a copper block, a cooling water channel is arranged in the copper block to carry out water cooling on the lance rod of the oxygen lance, and the copper block and the oxygen lance need to be timely found and shut down when water leakage of the cooling water channel is caused by abnormal phenomena such as scrap steel large block oxygen reflection and the like due to water cooling in the use process. If the copper blocks are continuously cut off water, the copper blocks are finally scrapped, which increases the production cost of the electric furnace using enterprises for the copper blocks with higher manufacturing cost. The reason why the copper blocks need to be provided with a cold water system is that the oxygen lance generates heat and needs to be cooled during the use process.

In addition, the position of the nozzle of the oxygen lance extending into the furnace shell directly influences the function of the oxygen lance in the furnace shell and influences the stable operation of production. According to the difference of the early stage, the middle stage and the later stage of the furnace service of the electric furnace, the position of a molten pool in the electric furnace, which needs oxygen spraying, can be different: in the early stage of the furnace service, the oxygen demand in the furnace is large, and in order to ensure that oxygen can fully contact the solution in the molten bath, an oxygen lance nozzle of an oxygen lance needs to extend into a furnace shell farther; feeding materials into the molten pool for many times in the middle of the campaign, and adjusting the oxygen lance nozzle of the oxygen lance to avoid the damage of the feeding materials to the oxygen lance nozzle; the oxygen lance nozzle of the oxygen lance needs to be adjusted in the later stage of the campaign, so that the oxygen lance nozzle moves to a position close to the inner wall of the furnace shell, namely, the oxygen lance nozzle does not need to extend into the furnace shell to a farther position. When the existing oxygen lance penetrates through the copper block, the existing oxygen lance needs to be attached to the hole wall of the copper block to dissipate heat, so that the position of the oxygen lance extending into the furnace shell is fixed, and the length of the existing oxygen lance does not meet the requirement of extending into the furnace shell to a farther position. Therefore, the oxygen lance used for the side wall of the furnace shell at present can not meet the requirement of timely adjusting the position of the oxygen lance extending into the furnace shell according to the early stage, the middle stage and the later stage of the service of the electric furnace, and the structure of the oxygen lance needs to be improved.

In view of this, the present embodiment provides a gas torch 100 provided on a furnace shell 210 of an electric furnace 200, including: the lance comprises a sleeve 110, a lance body 120 and a movable limiting part 140, wherein the sleeve 110 is connected with a furnace shell 210, the lance body 120 penetrates through the sleeve 110 and extends into the furnace shell 210, and a gap 130 is formed between the lance body 120 and the sleeve 110. The movable limiting member 140 is adapted to be inserted into or separated from the gap 130, wherein when the movable limiting member 140 is inserted into the gap 130, the movement of the spray gun body 120 is limited, and when the movable limiting member 140 is separated from the gap 130, the spray gun body 120 is adapted to slide in the axial direction in the sleeve 110.

As shown in fig. 3, the gas torch 100 according to the present embodiment can be used in conjunction with the electric furnace 200, and is applied to the side wall of the furnace casing 210 of the electric furnace 200. In order that the length of the gas lance 100 may be adapted to adjust the length extending into the furnace shell 210, the lance body 120 of the gas lance 100 comprises: a lance head 124 extending into the electric furnace 200; a gun shaft 126 including an inner barrel 1262, a middle barrel 1264 and an outer barrel 1266 arranged in sequence from inside to outside; the extension rod 128 is arranged between the gun head 124 and the gun rod 126 and comprises an inner layer extension tube 1282, a middle layer extension tube 1284 and an outer layer extension tube 1286 which are sequentially arranged from inside to outside. Wherein the inner barrel 1262 is in communication with the inner elongated tube 1282, the middle barrel 1264 is in communication with the middle elongated tube 1284, and the outer barrel 1266 is in communication with the outer elongated tube 1286 such that at least one of a gaseous medium and a liquid medium flows within the gun shaft 126, the elongated rod 128, and the gun head 124.

As shown in fig. 6, when the gas lance 100 is used, a mounting hole 220 is formed on a side wall of the furnace shell 210 for mounting the gas lance 100, the lance tip 124 extends into the furnace shell 210, and then a thermal insulation material, such as a plurality of magnesia carbon bricks, is filled between the sleeve 110 and an inner wall of the mounting hole 220, and gaps between the plurality of magnesia carbon bricks and gaps between the magnesia carbon bricks and the sleeve 110 are filled with a ramming material.

Because the gap 130 is formed between the spray gun body 120 and the sleeve 110, when the movable limiting member 140 is inserted into the gap 130, the movable limiting member 140 is abutted against both the sleeve 110 and the spray gun body 120, so that the movement of the spray gun body 120 is limited, when the movable limiting member 140 is separated from the gap 130, the spray gun body 120 is suitable for sliding in the sleeve 110 along the axial direction, and when the spray gun body 120 slides to a proper position, the movable limiting member 140 is inserted into the gap to limit the movement of the spray gun body 120.

In addition, the gap 130 can also be used as a cooling channel for air cooling of the gas lance 100, so that the temperature of the lance body 120 is dissipated into the air from the gap 130, which reduces the temperature of the gas lance 100, i.e., the gap 130 can replace a water-cooled cooling system for an oxygen lance mounting structure in a conventional structure, thereby avoiding the occurrence of water leakage and prolonging the service life of the gas lance 100.

Example 2:

the present embodiment provides a gas lance 100. In addition to the technical features of the above-described embodiments, the present embodiment also includes the following technical features.

As shown in fig. 1 to 5, the present embodiment provides a gas torch 100. In addition to the technical features of the above-described embodiments, the present embodiment also includes the following technical features.

The movable limiting member 140 includes: a lance body contact surface 142 and a sleeve contact surface 144, the sleeve contact surface 144 and the lance body contact surface 142 together defining a wedge-shaped structure 146, the wedge-shaped structure 146 including an included angle end 148. When the movable limiting member 140 is inserted into the gap 130, the contact surface 142 of the spray gun body abuts against the spray gun body 120, the contact surface 144 of the sleeve abuts against the sleeve 110, and the included angle end 148 extends into the gap 130.

When the movable limiting member 140 limits the movement of the spray gun body 120, the spray gun body contact surface 142 and the sleeve contact surface 144 abut against the spray gun body 120 and the sleeve 110, respectively, so as to extrude the spray gun body 120, and therefore, the movement of the spray gun body 120 can be limited. The wedge-shaped structure with the angled end 148 extends into the gap 130 and has a fine tuning effect on the lance body 120 after limited movement. The spray gun body 120 may be loosened during use, for example, due to vibration, or due to the inclined arrangement of the spray gun body 120, the spray gun body 120 may be loosened under the influence of its own weight, and at this time, the wedge-shaped structure 146 may fill up the loosened gap at any time, so that the spray gun body 120 always keeps a limited position.

In addition, in order to increase the structural stability of the spray gun body 120 after being limited in position, that is, in order to overcome the tendency of the change in position of the spray gun body 120, according to the principle that three points can determine a plane, the number of the movable limiting members 140 is one or more, the number of the fixed limiting members 150 is one or more, and when the movable limiting members 140 are inserted into the gap 130, the movable limiting members 140 and the fixed limiting members 150 are distributed at equal intervals around the spray gun body 120 in the circumferential direction, so that the structure can be more stable.

When the sum of the number of the movable limiting pieces 140 and the fixed limiting pieces 150 is three, and the projections on the cross section of the sleeve 110 are spaced at a certain distance from each other, and the maximum included angle between the two adjacent movable limiting pieces is less than 180 °, that is, the distribution range of the movable limiting pieces 140 and the fixed limiting pieces 150 around the spray gun body 120 along the circumferential direction exceeds 180 °, the problem of eccentricity of the spray gun body 120 due to the insertion of the movable limiting pieces 140 does not occur, and thus the structure of the spray gun body 120 after being limited in position is more stable. For example, the number of the fixed limiting members 150 is two, and the number of the movable limiting members 140 is one, or the number of the fixed limiting members 150 is one, and the number of the movable limiting members 140 is two. The number of the fixed position-limiting members 150 is preferably two, and the two fixed position-limiting members 150 are used to support the spray gun body 120, so that the structure is more stable, and the adjustment of the movable position-limiting members 140 is facilitated. Of course, the distance between the two adjacent movable limiting members 140 and the fixed limiting members 150 may also be different, and when the distance is the same, a more stable structure for limiting the displacement is certainly brought.

For another example, the sum of the number of the movable limiting members 140 and the number of the fixed limiting members 150 may be four. The two fixed limiting members 150 and the two movable limiting members 140 are provided, and each fixed limiting member 150 is symmetrically provided with one movable limiting member 140 along the radial direction of the sleeve 110, so that the structure is more stable after the axial position of the spray gun body 120 is fixed.

Example 3:

as shown in fig. 2, the present embodiment provides a gas torch 100. In addition to the technical features of the above-described embodiments, the present embodiment also includes the following technical features.

The fixed position limiter 150 is disposed on the inner wall 122 of the sleeve 110 to form the gap 130. When the movable limiting member 140 is inserted into the gap 130, the movable limiting member 140 and the fixed limiting member 150 are respectively abutted against the spray gun body 120, so that the movable limiting member 140 and the fixed limiting member 150 jointly extrude the spray gun body 120, and the movement of the spray gun body 120 can be limited.

Example 4:

as shown in fig. 1 to 5, the present embodiment provides a gas torch 100. In addition to the technical features of any of the above embodiments, the present embodiment also includes the following technical features.

Since the movable limiting member 140 needs to be inserted and pulled when the axial position of the spray gun body 120 needs to be adjusted, it is necessary to consider whether the insertion and pulling of the movable limiting member 140 is more convenient.

Therefore, one of the measures taken is to provide the notched groove 160 on the sleeve 110. The movable limiting member 140 slides along the cutaway groove 160 toward the furnace shell 210 to be inserted into the gap 130, and the movable limiting member 140 slides along the cutaway groove 160 toward the direction away from the furnace shell 210 to be separated from the gap 130. The cutaway slot 160 is provided at an end of the sleeve 110 distal from the furnace shell 210.

Since the gap 130 is narrow, when the movable limiting member 140 needs to be manually inserted into the gap 130, it is inconvenient, and at this time, the notched groove 160 is formed at the outer end of the sleeve 110, so that the movable limiting member 140 is inserted into the gap 130 from the position of the notched groove 160, which makes the insertion and extraction easier and brings convenience in operation.

The second measure is to connect the movable limiting member 140 to the sleeve 110 or a fixed object around the sleeve 110 through the flexible connecting member 130, specifically, one end of the flexible connecting member 170 is connected to the movable limiting member 140, and the other end is connected to at least one of the furnace shell 210 and the sleeve 110, in order to facilitate the operation and use of the movable limiting member 140. The flexible connecting member 130 not only can play a role of relatively fixing the movable limiting member 140, but also is convenient to operate due to the flexibility of the flexible connecting member 170, so that the convenience in operation of the movable limiting member 140 is further improved. The flexible connecting member 130 can be a chain or a steel wire rope, and the chain or the steel wire rope has certain hardness and certain flexibility, so that the flexible connecting member is convenient to use, simple to manufacture, or convenient to purchase.

Example 5:

When the gas lance 120 is mounted on the furnace shell 210, it needs to be fixedly mounted with the furnace shell 210 to ensure that the position of the gas lance 120 is relatively fixed during use. The present embodiment provides a support member 180 provided between the sleeve 110 and the furnace shell 210, wherein the sleeve 110 is connected with the furnace shell 210 by the support member 180, so that the sleeve 110 and the furnace shell 210 can be fixed. Example 6:

As previously mentioned, the lance body 120 needs to be long enough to accommodate the desired adjustment of the position of the lance body 120 extending into the furnace shell 210. Therefore, the lance body 120 in the embodiment is formed by improving the prior oxygen lance.

The spray gun body 120 includes: a lance head 124, a lance stem 126 and an extension bar 128, wherein the lance head 124 extends into the furnace shell 210. The gun shaft 126 includes an inner barrel 1262, a middle barrel 1264 and an outer barrel 1266 arranged in sequence from inside to outside. The extension rod 128 is arranged between the gun head 124 and the gun rod 126 and comprises an inner extension tube 1282, a middle extension tube 1284 and an outer extension tube 1286 which are sequentially arranged from inside to outside. Wherein the inner barrel 1262 is in communication with the inner elongated tube 1282, the middle barrel 1264 is in communication with the middle elongated tube 1284, and the outer barrel 1266 is in communication with the outer elongated tube 1286 such that at least one of a gaseous medium and a liquid medium flows within the gun shaft 126, the elongated rod 128, and the gun head 124. Namely, the length of the oxygen lance rod of the original oxygen lance is prolonged equivalently.

The structure of the extension bar 128 is consistent with that of the lance rod 126, which not only keeps the function of the lance rod of the original oxygen lance, but also prolongs the length of the oxygen lance, so as to adjust the position of the oxygen lance extending into the furnace shell of the electric furnace in time according to the early stage, the middle stage and the later stage of the electric furnace campaign.

Example 6:

The present embodiment provides a gas torch 100 provided on a furnace shell 210 of an electric furnace 200, including: the device comprises a sleeve 110, a spray gun body 120 and a movable limiting piece 140, wherein the sleeve 110 is connected with a furnace shell 210; the spray gun body 120 penetrates through the sleeve 110 and extends into the electric furnace 200, and a gap 130 is formed between the spray gun body 120 and the sleeve 110; the movable limiting member 140 is adapted to be inserted into or separated from the gap 130. When the movable limiting member 140 is inserted into the gap 130, the movement of the spray gun body 120 is limited, and when the movable limiting member 140 is separated from the gap 130, the spray gun body 120 is adapted to slide in the axial direction in the sleeve 110.

The gas lance 100 of the present embodiment can be used with the electric furnace 200 and applied to the side wall of the furnace shell 210. In order that the length of the gas lance 100 may be adapted to adjust the length extending into the furnace shell 210, the lance body 120 of the gas lance 100 comprises: a lance head 124, a lance stem 126 and an extension bar 128, the lance head 124 extending into the furnace shell 210. Gun rod 126 includes interior barrel 1262, middle level barrel 1264 and outer barrel 1266 that set up from inside to outside in order, and extension bar 128 is located between rifle head 124 and gun rod 126, and extension bar 128 includes interior extension pipe 1282, middle level extension pipe 1284 and outer extension pipe 1286 that set up from inside to outside in order. Wherein the inner barrel 1262 is in communication with the inner elongated tube 1282, the middle barrel 1264 is in communication with the middle elongated tube 1284, and the outer barrel 1266 is in communication with the outer elongated tube 1286 such that at least one of a gaseous medium and a liquid medium flows within the gun shaft 126, the elongated rod 128, and the gun head 124. Namely, the length of the oxygen lance rod of the original oxygen lance is prolonged equivalently.

Because the gap 130 is formed between the spray gun body 120 and the sleeve 110, when the movable limiting member 140 is inserted into the gap 130, the movement of the spray gun body 120 is limited, and when the movable limiting member 140 is separated from the gap 130, the spray gun body 120 is adapted to slide in the sleeve 110 along the axial direction, and when the spray gun body 120 slides to a proper position, the movable limiting member 140 is inserted into the gap to limit the movement of the spray gun body 120.

The gap 130 may also serve as a cooling passage for air cooling of the gas torch 100.

When the gas lance 120 is mounted on the furnace shell 210, it needs to be fixedly mounted with the furnace shell 210 to ensure that the position of the gas lance 120 is relatively fixed during use. The present embodiment provides a support member 180 provided between the sleeve 110 and the furnace shell 210, wherein the sleeve 110 is connected with the furnace shell 210 by the support member 180, so that the sleeve 110 and the furnace shell 210 can be fixed.

When the gas lance 100 is used, a mounting hole 220 is formed in a side wall of the furnace shell 210 for mounting the gas lance 100, the lance head 124 extends into the furnace shell 210, and then a heat insulating material, such as a plurality of magnesia carbon bricks, is filled between the sleeve 110 and an inner wall of the mounting hole 220, and gaps between the plurality of magnesia carbon bricks and gaps between the magnesia carbon bricks and the sleeve 110 are filled with a ramming material.

Example 7:

to achieve the second object of the present invention, an embodiment of the present invention provides an electric fire 200 including

A furnace shell 210 and mounting holes 220, the mounting holes 220 being provided in the furnace shell 210 for mounting the gas lances 100 such that the gas lances 100 extend into the furnace shell 210 through the mounting holes 220.

Specifically, the gas torch 100 may be connected to an inner wall of the mounting hole 220 through a support member 180, such that the support member 180 may support and connect the sleeve 110, wherein the support member 180 has two plate-shaped structures, and when the mounting hole 220 is a rectangular hole, the two plate-shaped structures are respectively connected to an outer wall of the sleeve 110 through one end and connected to a top wall and a side wall of the mounting hole 220 through the other end.

After the gas torch 110 is installed in the installation hole 220 through the support member 180, a plurality of magnesia carbon bricks are filled in a gap between the sleeve 110 and the inner wall of the installation hole 220. And the tamping materials are filled in gaps among the magnesia carbon bricks and gaps between the magnesia carbon bricks and the sleeve.

The gas torch 100 is applied to a side wall of a furnace shell 210 of the electric furnace 200, wherein the movement of the torch body 120 is restricted when the movable stopper 140 is fitted into the gap 130, and the torch body 120 is adapted to slide in the axial direction in the sleeve 110 when the movable stopper 140 is disengaged from the gap 130. Therefore, the position of the gas spray gun 100 extending into the furnace shell 210 can be timely determined according to the early stage, the middle stage and the later stage of the service of the electric furnace, so that in the early stage of the service of the furnace, in order to ensure that oxygen can fully contact the solution in the molten bath, the gun head 124330 can be adjusted to extend farther into the furnace shell 210; in the middle stage of the campaign, when the feeding needs to be performed into the molten pool for many times, the gas lance 100 is adjusted to be closer to the side wall of the furnace shell 210 by plugging and pulling the movable limiting member 140, so that the damage of the feeding to the lance head 124 can be avoided; in the later period of the furnace service, the position of the oxygen gas spray gun 100 close to the inner wall of the furnace shell 210 can be adjusted, so that the oxygen quantity is saved. In addition, the gap 130 can also be used as a cooling channel for air cooling of the gas lance 100, thereby avoiding water leakage and prolonging the service life of the gas lance 100. The position of the gas lance 100 extending into the furnace shell 210 can be adjusted in time according to the early stage, the middle stage and the later stage of the furnace service, so that the stable operation of production can be ensured. In summary, the embodiment of the invention has the following beneficial effects:

1. the gas spray gun can be limited in the axial position or can slide in the axial direction, so that the position of the gas spray gun extending into the furnace shell can be timely adjusted according to the early stage, the middle stage and the later stage of the service of the electric furnace, the continuous production of the electric furnace is ensured, and the production quality is improved.

2. The traditional water cooling system is omitted, and the production efficiency is improved by adjusting the clearance air cooling.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or units must have a specific direction, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a gas spray gun which characterized in that, locates on the stove outer covering of electric stove, includes:

the sleeve is connected with the furnace shell;

the spray gun body penetrates through the sleeve and extends into the furnace shell, and a gap is formed between the spray gun body and the sleeve;

the movable limiting part is suitable for being embedded into or separated from the gap;

when the movable limiting part is embedded into the gap, the movement of the spray gun body is limited, and when the movable limiting part is separated from the gap, the spray gun body is suitable for sliding in the sleeve along the axial direction.

2. The gas lance defined in claim 1 wherein the movable stop comprises:

a contact surface of the spray gun body;

a sleeve contact surface that cooperates with the lance body contact surface to define a wedge-shaped structure that includes an included angle end;

when the movable limiting part is embedded into the gap, the contact surface of the spray gun body is abutted against the spray gun body, the contact surface of the sleeve is abutted against the sleeve, and the included angle end extends into the gap.

3. A gas lance as claimed in claim 1 or claim 2, comprising:

the fixed limiting part is arranged on the inner wall of the sleeve;

when the movable limiting part is embedded into the gap, the movable limiting part and the fixed limiting part are respectively abutted against the spray gun body.

4. The gas lance defined in claim 3,

the number of the movable limiting parts is one or more;

the number of the fixed limiting parts is one or more;

when the activity locating part imbeds during the clearance, the activity locating part with fixed locating part is along circumference around spray gun body equidistance distributes.

5. A gas lance as claimed in claim 1 or claim 2, comprising:

the notch groove is arranged on the sleeve;

the movable limiting part slides along the gap groove in the direction close to the furnace shell to be embedded into the gap, and the movable limiting part slides along the gap groove in the direction far away from the furnace shell to be separated from the gap.

6. The gas lance defined in claim 5,

7. A gas lance as claimed in claim 1 or claim 2, comprising:

a flexible connector;

one end of the flexible connecting piece is connected with the movable limiting piece, and the other end of the flexible connecting piece is connected with at least one of the furnace shell and the sleeve.

8. A gas lance as claimed in claim 1 or claim 2, comprising:

the supporting piece is arranged between the sleeve and the furnace shell;

wherein, the sleeve is connected with the furnace shell through the supporting piece.

9. The gas lance defined in claim 1 or claim 2 wherein the lance body includes:

the gun head extends into the furnace shell;

the gun rod comprises an inner layer gun barrel, a middle layer gun barrel and an outer layer gun barrel which are sequentially arranged from inside to outside;

the extension bar is arranged between the gun head and the gun rod and comprises an inner layer extension pipe, a middle layer extension pipe and an outer layer extension pipe which are sequentially arranged from inside to outside;

10. An electric fire, comprising:

a furnace shell;

the mounting hole is arranged on the furnace shell;

the gas lance defined in any one of claims 1 to 9 is provided on the furnace shell and extends into the electric furnace through the mounting hole.