阅读说明：本技术 一种电炉侧壁氧枪功能优化方法 (Method for optimizing function of oxygen lance on side wall of electric furnace ) 是由 霍昌军 孙晓强 杨欣 黄卫东 刘景军 季海龙 于 2021-09-03 设计创作，主要内容包括：本发明属于机械制作安装领域,具体的说是一种电炉侧壁氧枪功能优化方法,该方法包括以下步骤：S1：对安装氧枪的水冷板进行改造,由原来的两组水管改为一组水管,为氧枪整体上调提供空间；S2：根据每支氧枪在炉壁的不同位置,对氧枪安装的高度进行精确的调整,使得氧枪的安装高度由原来的1100mm提高至1300mm；S3：根据每支氧枪在炉壁的不同位置,对氧枪的嘴吹射角度进行精确的调整,使得氧枪的吹射角度由的原来的45度上扬至55度；S4：根据不同的冶炼阶段,编写冶炼程序,对每支氧枪的吹扫氧、燃烧氧和煤气进行及时调整；为氧枪整体上调提供空间；能确保每支氧枪的吹扫范围在三根电极组成的同心圆内。(The invention belongs to the field of mechanical manufacturing and installation, and particularly relates to a method for optimizing functions of an oxygen lance on the side wall of an electric furnace, which comprises the following steps: s1: the water cooling plate for installing the oxygen lance is reformed, and the original two groups of water pipes are changed into one group of water pipes, so that space is provided for integrally adjusting the oxygen lance; s2: accurately adjusting the installation height of the oxygen lances according to different positions of each oxygen lance on the wall of the furnace, so that the installation height of the oxygen lances is increased from 1100mm to 1300 mm; s3: accurately adjusting the nozzle blowing angle of each oxygen lance according to different positions of each oxygen lance on the furnace wall, so that the blowing angle of each oxygen lance is raised from the original 45 degrees to 55 degrees; s4: according to different smelting stages, a smelting program is compiled, and the purging oxygen, the combustion oxygen and the coal gas of each oxygen lance are adjusted in time; providing space for integrally adjusting the oxygen lance; the blowing range of each oxygen lance can be ensured to be in a concentric circle formed by three electrodes.)

1. A method for optimizing the function of an oxygen lance on the side wall of an electric furnace is characterized by comprising the following steps: the method comprises the following steps:

s1: the water cooling plate for installing the oxygen lance (1) is reformed, and the original two groups of water pipes are changed into one group of water pipes, so that a space is provided for integrally adjusting the oxygen lance (1);

s2: accurately adjusting the installation height of each oxygen lance (1) according to different positions of each oxygen lance (1) on the furnace wall, so that the installation height of each oxygen lance (1) is increased from original 1100mm to 1300 mm;

s3: accurately adjusting the blow-shooting angle of the nozzle of each oxygen lance (1) according to different positions of each oxygen lance (1) on the furnace wall, so that the blow-shooting angle of each oxygen lance (1) is raised from the original 45 degrees to 55 degrees;

s4: according to different smelting stages, smelting programs are compiled, and the purging oxygen, the combustion oxygen and the coal gas of each oxygen lance (1) are adjusted in time.

2. The method for optimizing the function of the oxygen lance on the side wall of the electric furnace as claimed in claim 1, wherein the method comprises the following steps: the water cooling plate is B-shaped, and the group of water pipes comprises two water pipes.

3. The method for optimizing the function of the oxygen lance on the side wall of the electric furnace as claimed in claim 1, wherein the method comprises the following steps: the installation height of the oxygen lance (1) refers to the distance between the oxygen lance (1) and the bottom of the furnace.

4. The method for optimizing the function of the oxygen lance on the side wall of the electric furnace as claimed in claim 1, wherein the method comprises the following steps: the blowing angle of the oxygen lance (1) refers to the included angle between the oxygen lance (1) and the wall of the furnace.

5. The method for optimizing the function of the oxygen lance on the side wall of the electric furnace as claimed in claim 1, wherein the method comprises the following steps: the smelting program comprises an instruction for controlling the opening of the regulating valve.

6. The method for optimizing the function of the oxygen lance on the side wall of the electric furnace as claimed in claim 1, wherein the method comprises the following steps: the oxygen lance (1) is arranged on the side wall of the electric furnace (2) through a fixing mechanism; the fixing mechanism comprises a lantern ring (31), an insert rod (32), a sleeve (33) and an insert hole (34); a mounting hole (35) is formed in the side wall of the electric furnace (2); the lantern ring (31) is sleeved on the oxygen lance (1) and fixedly connected with the oxygen lance (1), and the lantern ring (31) is in clearance fit with the mounting hole (35); the insertion hole (34) is formed in the outer wall of the sleeve ring (31); a cavity (36) is formed in the wall body of the electric furnace (2); a push plate (37) is connected in the cavity (36) in a sliding way; the inserted bar (32) is fixedly connected to the side wall of the push plate (37), and the other end of the inserted bar (32) is connected into the insertion hole (34) in a sliding manner; the inner wall of the cavity (36) is also fixedly connected with a guide rod (38); the outer wall of the guide rod (38) is sleeved with a sliding block (39); one side, far away from the inserted link (32), of the push plate (37) is hinged with a connecting rod (310), and the other end of the connecting rod (310) is hinged with a sliding block (39); the sleeve (33) penetrates through and is connected to the side wall of the electric furnace (2) in a sliding mode, and one end of the sleeve (33) is fixedly connected with the sliding block (39).

7. The method for optimizing the function of the oxygen lance on the side wall of the electric furnace as claimed in claim 6, wherein the method comprises the following steps: the outer side wall of the electric furnace (2) is provided with a limiting mechanism; the limiting mechanism comprises a threaded rod (41) and a limiting plate (42); one end of the sleeve (33) positioned outside the cavity (36) is fixedly connected with a circular plate (43); the threaded rod (41) is fixedly connected to the outer side wall of the electric furnace (2); a through hole (44) is formed in the side wall of the limiting plate (42), and threads are arranged on the inner wall of the through hole (44); the limiting plate (42) is sleeved on the threaded rod (41), and threads on the inner wall of the through hole (44) are matched with threads on the threaded rod (41).

8. The method for optimizing the function of the oxygen lance on the side wall of the electric furnace as claimed in claim 7, wherein the method comprises the following steps: an air bag (51) is fixedly connected to the bottom of the insertion hole (34); the outer wall of the lantern ring (31) is further fixedly connected with a rubber layer (52), and the inside of the rubber layer (52) is arranged in a hollow mode; the air bag (51) communicates with the inside of the rubber layer (52).

9. The method for optimizing the function of the oxygen lance on the side wall of the electric furnace as claimed in claim 8, wherein the method comprises the following steps: one side of the push plate (37) far away from the connecting rod (310) is fixedly connected with a spring (6), and the other end of the spring (6) is fixedly connected to the bottom of the cavity (36).

10. The method for optimizing the function of the oxygen lance on the side wall of the electric furnace as claimed in claim 9, wherein the method comprises the following steps: and one side of the lantern ring (31) positioned outside the electric furnace (2) is fixedly connected with an annular plate (7).

Technical Field

The invention belongs to the field of mechanical manufacturing and installation, and particularly relates to a method for optimizing functions of an oxygen lance on the side wall of an electric furnace.

Background

The side wall oxygen lance is important equipment for electric furnace smelting, has great influence on decarburization, temperature rise, slag formation and corrosion of furnace inner wall materials in the smelting process, and has certain influence on electrode consumption.

In the prior art, the original side wall oxygen lance is unreasonable to install and use, so that the installation height, the blowing angle and the use of gas of the side wall oxygen lance can not enable the electric furnace smelting system to achieve the highest energy efficiency ratio; therefore, the invention provides a method for optimizing the function of an oxygen lance on the side wall of an electric furnace.

Disclosure of Invention

In order to make up for the defects of the prior art and solve the problem that the installation height, the purging angle and the use of gas of the side wall oxygen lance cannot enable the electric furnace smelting system to achieve the highest energy efficiency ratio due to unreasonable installation and use of the conventional side wall oxygen lance, the invention provides the function optimization method of the electric furnace side wall oxygen lance.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a method for optimizing the function of an oxygen lance on the side wall of an electric furnace, which comprises the following steps:

s1: the water cooling plate for installing the oxygen lance is reformed, and the original two groups of water pipes are changed into one group of water pipes, so that space is provided for integrally adjusting the oxygen lance;

s2: accurately adjusting the installation height of the oxygen lances according to different positions of each oxygen lance on the wall of the furnace, so that the installation height of the oxygen lances is increased from 1100mm to 1300 mm;

s3: accurately adjusting the blow-shooting angle of the nozzle of each oxygen lance according to different positions of each oxygen lance on the wall of the furnace, so that the blow-shooting angle of each oxygen lance is raised from the original 45 degrees to 55 degrees;

s4: according to different smelting stages, smelting programs are compiled, and the purging oxygen, the combustion oxygen and the coal gas of each oxygen lance are adjusted in time.

After the water cooling plate for installing the oxygen lance is modified, a space is provided for integrally adjusting the oxygen lance; after the installation height of the oxygen lance is adjusted to 1300mm and the blowing angle of the oxygen lance is raised to 55 degrees, the blowing range of each lance can be ensured to be within a concentric circle formed by three electrodes, the electrode loss caused by blowing the electrodes by the oxygen lance is avoided, and the damage to a water cooling plate of a gun core caused by tempering can also be avoided; by programming programs, the oxygen blowing, oxygen burning and coal gas of each oxygen lance are adjusted in time by the programs, and the opening of the adjusting valve is controlled, so that the pressure, flow and flow speed of the oxygen lances are controlled, and the optimal energy efficiency ratio and flame penetration effect are achieved.

Furthermore, the water-cooling plate is B-shaped, and a group of water pipes comprises two water pipes.

Furthermore, the installation height of the oxygen lance refers to the distance between the oxygen lance and the furnace bottom.

Further, the blowing angle of the oxygen lance refers to the included angle between the oxygen lance and the furnace wall.

Further, the smelting program comprises an instruction for controlling the opening of the regulating valve.

Further, the oxygen lance is arranged on the side wall of the electric furnace through a fixing mechanism; the fixing mechanism comprises a lantern ring, an inserting rod, a sleeve and an inserting hole; the side wall of the electric furnace is provided with a mounting hole; the lantern ring is sleeved on the oxygen lance and fixedly connected with the oxygen lance, and the lantern ring is in clearance fit with the mounting hole; the jack is arranged on the outer wall of the lantern ring; a cavity is formed in the wall body of the electric furnace; a push plate is connected in the cavity in a sliding manner; the inserting rod is fixedly connected to the side wall of the push plate, and the other end of the inserting rod is connected in the inserting hole in a sliding mode; the inner wall of the cavity is also fixedly connected with a guide rod; the outer wall of the guide rod is sleeved with a sliding block; one side of the push plate, which is far away from the inserted link, is hinged with a connecting rod, and the other end of the connecting rod is hinged with the sliding block; the sleeve penetrates through and is connected to the side wall of the electric furnace in a sliding mode, and one end of the sleeve is fixedly connected with the sliding block; when the oxygen lance is installed, the oxygen lance is inserted into the installation hole firstly, the annular plate is in contact with the outer side wall of the electric furnace, and then the sleeve is extruded, so that the sleeve drives the sliding block to slide along the guide rod, the push plate and the inserted bar move downwards under the action of the connecting rod, and the inserted bar is inserted into the insertion hole, so that the installation of the oxygen lance is realized, the structure is simple, and the installation is simple and convenient.

Further, a limiting mechanism is arranged on the outer side wall of the electric furnace; the limiting mechanism comprises a threaded rod and a limiting plate; one end of the sleeve, which is positioned outside the cavity, is fixedly connected with a circular plate; the threaded rod is fixedly connected to the outer side wall of the electric furnace; the side wall of the limiting plate is provided with a through hole, and the inner wall of the through hole is provided with threads; the limiting plate is sleeved on the threaded rod, and threads on the inner wall of the through hole are matched with threads on the threaded rod; after the inserted bar inserted the jack, rotate the limiting plate for the limiting plate realize the removal of horizontal direction on the threaded rod, and the limiting plate will keep off in the front of circular slab (because the screw thread has auto-lock nature), can avoid the circular slab to move back to initial position, so push pedal and inserted bar can not produce the phenomenon of moving back, so the inserted bar has been inserted in the jack always, has improved the fixed effect to the oxygen rifle.

Further, the bottom of the jack is fixedly connected with an air bag; the outer wall of the lantern ring is also fixedly connected with a rubber layer, and the interior of the rubber layer is hollow; the air bag is communicated with the inside of the rubber layer; after the inserted bar inserts the jack, the inserted bar will directly extrude the gasbag for the inside gas of gasbag flows into the inside on rubber layer, makes the rubber layer begin to swell, can fill up the gap between the lantern ring and the mounting hole, makes the oxygen rifle can not produce any rocking in the mounting hole, has improved the fixed effect to the oxygen rifle, and the accurate realization of the oxygen rifle of being convenient for sweeps oxygen.

Furthermore, a spring is fixedly connected to one side of the push plate, which is far away from the connecting rod, and the other end of the spring is fixedly connected to the bottom of the cavity; the in-process of installation oxygen rifle, after push pedal and inserted bar downstream, will make the spring produce compression deformation, when the oxygen rifle is dismantled to needs, the limiting plate of first counter rotation for limiting plate and circular slab separation, move the initial position with the sleeve again, because the restoring force of spring, the initial position will be got back to the push pedal simultaneously, and then the inserted bar also leaves the jack, takes out the oxygen rifle in following the mounting hole this moment again, just realizes the dismantlement to the oxygen rifle, the oxygen rifle of being convenient for change.

Further, one side of the lantern ring, which is positioned outside the electric furnace, is fixedly connected with an annular plate; the annular plate has a certain limiting effect on the length of the oxygen lance entering the electric furnace, and meanwhile, after the oxygen lance is inserted into the mounting hole, the inserted rod can be accurately inserted into the insertion hole, so that the oxygen lance can be mounted.

The invention has the following beneficial effects:

1. according to the method for optimizing the function of the oxygen lance on the side wall of the electric furnace, a water cooling plate for installing the oxygen lance 1 is modified, and a space is provided for integrally adjusting the oxygen lance 1; after the installation height of the oxygen lance 1 is adjusted to 1300mm and the blowing angle of the oxygen lance 1 is raised to 55 degrees, the blowing range of each lance can be ensured to be within a concentric circle formed by three electrodes, the electrode loss caused by the blowing of the oxygen lance 1 by the electrodes is avoided, and the damage of tempering to a water cooling plate of a lance core can also be avoided; by programming programs, the oxygen blowing, oxygen burning and coal gas of each oxygen lance are adjusted in time by the programs, and the opening of the adjusting valve is controlled, so that the pressure, flow and flow speed of the oxygen lance 1 are controlled, and the optimal energy efficiency ratio and flame penetration effect are achieved.

2. According to the method for optimizing the function of the oxygen lance on the side wall of the electric furnace, the sleeve ring, the inserted rod, the sleeve, the inserted hole, the mounting hole, the cavity, the push plate, the guide rod, the slide block, the connecting rod, the threaded rod, the limiting plate, the circular plate, the through hole, the air bag, the rubber layer, the spring and the annular plate are matched for use, so that the oxygen lance can be conveniently mounted and dismounted, and can be more conveniently replaced.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a flow chart of a method of the present invention;

FIG. 2 is a schematic view of the securing mechanism of the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

FIG. 4 is an enlarged view of a portion B of FIG. 2;

in the figure: 1. an oxygen lance; 2. an electric furnace; 31. a collar; 32. inserting a rod; 33. a sleeve; 34. a jack; 35. mounting holes; 36. a cavity; 37. pushing the plate; 38. a guide bar; 39. a slider; 310. a connecting rod; 41. a threaded rod; 42. a limiting plate; 43. a circular plate; 44. a through hole; 51. an air bag; 52. a rubber layer; 6. a spring; 7. an annular plate.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in figures 1 to 4, the method for optimizing the function of the oxygen lance on the side wall of the electric furnace comprises the following steps:

s1: the water cooling plate for installing the oxygen lance 1 is reformed, and the original two groups of water pipes are changed into one group of water pipes, so that space is provided for integrally adjusting the oxygen lance 1;

s2: accurately adjusting the installation height of each oxygen lance 1 according to different positions of each oxygen lance 1 on the furnace wall, so that the installation height of each oxygen lance 1 is increased from 1100mm to 1300 mm;

s3: accurately adjusting the blow-shooting angle of the nozzle of each oxygen lance 1 according to different positions of each oxygen lance 1 on the furnace wall, so that the blow-shooting angle of each oxygen lance 1 is raised from the original 45 degrees to 55 degrees;

s4: according to different smelting stages, smelting programs are compiled, and the purging oxygen, the combustion oxygen and the coal gas of each oxygen lance are adjusted in time.

In order to further realize the content of the invention, the water cooling plate is B-shaped, and one group of water pipes comprises two water pipes.

In order to further realize the invention, the installation height of the oxygen lances 1 is defined as the distance between the oxygen lances 1 and the bottom of the furnace.

In order to further realize the content of the invention, the blow angle of the oxygen lance 1 refers to the included angle between the oxygen lance 1 and the wall of the furnace.

In order to further realize the content of the invention, the smelting program comprises an instruction for controlling the opening of the regulating valve.

After the water cooling plate for installing the oxygen lance 1 is modified, a space is provided for integrally adjusting the oxygen lance 1; after the installation height of the oxygen lance 1 is adjusted to 1300mm and the blowing angle of the oxygen lance 1 is raised to 55 degrees, the blowing range of each lance can be ensured to be within a concentric circle formed by three electrodes, the electrode loss caused by the blowing of the oxygen lance 1 by the electrodes is avoided, and the damage of tempering to a water cooling plate of a lance core can also be avoided; by programming programs, the programs are used for adjusting the blowing oxygen, the combustion oxygen and the coal gas of each oxygen lance 1 in time, and the opening of the regulating valve is controlled, so that the control of the pressure, the flow and the flow speed of the oxygen lances 1 is realized, and the optimal energy efficiency ratio and the optimal flame penetration effect are achieved.

In order to further realize the content of the invention, the oxygen lance 1 is arranged on the side wall of the electric furnace 2 through a fixing mechanism; the fixing mechanism comprises a collar 31, a plug rod 32, a sleeve 33 and a jack 34; a mounting hole 35 is formed in the side wall of the electric furnace 2; the lantern ring 31 is sleeved on the oxygen lance 1 and fixedly connected with the oxygen lance 1, and the lantern ring 31 is in clearance fit with the mounting hole 35; the insertion hole 34 is formed in the outer wall of the collar 31; a cavity 36 is formed in the wall body of the electric furnace 2; a push plate 37 is connected in the cavity 36 in a sliding manner; the inserted link 32 is fixedly connected with the side wall of the push plate 37, and the other end of the inserted link 32 is slidably connected in the insertion hole 34; a guide rod 38 is fixedly connected to the inner wall of the cavity 36; the outer wall of the guide rod 38 is sleeved with a sliding block 39; one side of the push plate 37, which is far away from the inserted link 32, is hinged with a connecting rod 310, and the other end of the connecting rod 310 is hinged with the sliding block 39; the sleeve 33 penetrates through and is connected to the side wall of the electric furnace 2 in a sliding manner, and one end of the sleeve 33 is fixedly connected with the sliding block 39; when installing oxygen rifle 1, insert the mounting hole 35 earlier with oxygen rifle 1 to make annular plate 7 and the contact of the lateral wall of electric stove 2, extrude sleeve 33 again this moment, make sleeve 33 drive slider 39 and slide along guide arm 38, and then through the effect of connecting rod 310, make push pedal 37 and inserted bar 32 downstream, and then make inserted bar 32 insert in jack 34, thereby realize the installation to oxygen rifle 1, simple structure, the simple installation.

In order to further realize the content of the invention, a limiting mechanism is arranged on the outer side wall of the electric furnace 2; the limiting mechanism comprises a threaded rod 41 and a limiting plate 42; a circular plate 43 is fixedly connected to one end of the sleeve 33, which is positioned outside the cavity 36; the threaded rod 41 is fixedly connected to the outer side wall of the electric furnace 2; a through hole 44 is formed in the side wall of the limiting plate 42, and threads are formed on the inner wall of the through hole 44; the limiting plate 42 is sleeved on the threaded rod 41, and the threads on the inner wall of the through hole 44 are matched with the threads on the threaded rod 41; after the insertion rod 32 is inserted into the insertion hole 34, the limit plate 42 is rotated, so that the limit plate 42 can move horizontally on the threaded rod 41, the limit plate 42 is also blocked in front of the circular plate 43 (due to the self-locking property of the threads), the circular plate 43 can be prevented from retreating to the initial position, and then the push plate 37 and the insertion rod 32 cannot retreat, so that the insertion rod 32 is always inserted into the insertion hole 34, and the fixing effect on the oxygen lance 1 is improved.

In order to further realize the content of the invention, an air bag 51 is fixedly connected to the bottom of the jack 34; the outer wall of the lantern ring 31 is also fixedly connected with a rubber layer 52, and the inside of the rubber layer 52 is hollow; the air bag 51 communicates with the inside of the rubber layer 52; after the insert rod 32 is inserted into the insertion hole 34, the insert rod 32 directly extrudes the air bag 51, so that the gas in the air bag 51 flows into the rubber layer 52, the rubber layer 52 begins to swell, the gap between the lantern ring 31 and the mounting hole 35 can be filled up, the oxygen lance 1 cannot shake in the mounting hole 35, the fixing effect on the oxygen lance 1 is improved, and the oxygen lance 1 can be conveniently and accurately purged.

In order to further realize the content of the present invention, a spring 6 is fixedly connected to one side of the push plate 37 away from the connecting rod 310, and the other end of the spring 6 is fixedly connected to the bottom of the cavity 36; in the process of installing the oxygen lance 1, after the push plate 37 and the insert rod 32 move downwards, the spring 6 is made to generate compression deformation, when the oxygen lance 1 needs to be disassembled, the limiting plate 42 is rotated reversely firstly, the limiting plate 42 is separated from the circular plate 43, then the sleeve 33 is moved to the initial position, meanwhile, due to the restoring force of the spring 6, the push plate 37 returns to the initial position, further the insert rod 32 also leaves the jack 34, at the moment, the oxygen lance 1 is taken out from the installation hole 35, the disassembly of the oxygen lance 1 is realized, and the oxygen lance 1 is convenient to replace.

In order to further realize the content of the invention, a ring-shaped plate 7 is fixedly connected to one side of the lantern ring 31, which is positioned outside the electric furnace 2; the arrangement of the annular plate 7 has a certain limiting effect on the length of the oxygen lance 1 entering the electric furnace 2, and simultaneously, after the oxygen lance 1 is inserted into the mounting hole 35, the inserted link 32 can be accurately inserted into the insertion hole 34, so that the oxygen lance 1 can be mounted.

The working principle is as follows: when the oxygen lance 1 is installed, firstly, the oxygen lance 1 is inserted into the installation hole 35, the annular plate 7 is in contact with the outer side wall of the electric furnace 2, then the sleeve 33 is extruded, the sleeve 33 drives the sliding block 39 to slide along the guide rod 38, the push plate 37 and the inserted rod 32 move downwards under the action of the connecting rod 310, the inserted rod 32 is inserted into the insertion hole 34, at the moment, the limiting plate 42 is rotated, the limiting plate 42 moves on the threaded rod 41 in the horizontal direction, the limiting plate 42 is blocked in front of the circular plate 43 (due to the fact that threads have self-locking performance), the situation that the circular plate 43 retreats to the initial position can be avoided, the push plate 37 and the inserted rod 32 cannot retreat, the inserted rod 32 is always inserted into the insertion hole 34, installation of the oxygen lance 1 is achieved, the fixing effect of the oxygen lance 1 is good, the structure is simple, and installation is simple and convenient; after the inserted link 32 is inserted into the insertion hole 34, the inserted link 32 directly extrudes the air bag 51, so that the gas in the air bag 51 flows into the rubber layer 52, the rubber layer 52 begins to swell, the gap between the lantern ring 31 and the mounting hole 35 can be filled, the oxygen lance 1 cannot shake in the mounting hole 35, the fixing effect on the oxygen lance 1 is improved, and the oxygen purging of the oxygen lance 1 can be accurately realized; in the process of installing the oxygen lance 1, after the push plate 37 and the insert rod 32 move downwards, the spring 6 generates compression deformation, when the oxygen lance 1 needs to be disassembled, the limit plate 42 is firstly rotated reversely, the limit plate 42 is separated from the circular plate 43, then the sleeve 33 is moved to the initial position, meanwhile, due to the restoring force of the spring 6, the push plate 37 returns to the initial position, the insert rod 32 also leaves the jack 34, at the moment, the oxygen lance 1 is taken out from the installation hole 35, the disassembly of the oxygen lance 1 is realized, and the replacement of a new oxygen lance 1 is convenient; the arrangement of the annular plate 7 has a certain limiting effect on the length of the oxygen lance 1 entering the electric furnace 2, and simultaneously, after the oxygen lance 1 is inserted into the mounting hole 35, the inserted link 32 can be accurately inserted into the insertion hole 34, so that the oxygen lance 1 can be mounted.

In the above, the oxygen lance and the electric furnace are both in the prior art, and are not described herein.

The front, the back, the left, the right, the upper and the lower are all based on the figure 2 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.