阅读说明：本技术 一种高炉炉底水冷管穿管方法及结构 (Method and structure for passing water-cooled tube at bottom of blast furnace ) 是由 闵良建 帅文杰 刘卫健 于 2021-06-10 设计创作，主要内容包括：本发明提供了一种高炉炉底水冷管穿管方法及结构。该方法包括如下步骤：在已损坏的原有水冷管上开孔,将灌浆用的压浆管插入孔内并焊接牢固；封板焊接步骤,在原有水冷管的端部位置焊接呈环形结构的封板；将新水冷管自封板的内孔穿过插入至所述原有水冷管的内部后,将所述封板与所述新水冷管进行焊接；向所述原有水冷管和所述新水冷管之间围设的环形腔体内灌入压浆料。本发明通过将新水冷管插入已损坏水冷管,密封并向已损坏水冷管注入高导热压浆料充实内外管道间隙的方式来解决施工过程中水冷管损坏后难以大范围更换的问题,在不破坏原有结构及耐材的前提下大规模更换已损坏的水冷管,更换后对水冷管整体导热效果产生的不利影响减到最小。(The invention provides a method and a structure for passing a water-cooled tube at the bottom of a blast furnace. The method comprises the following steps: forming a hole on the damaged original water-cooling pipe, inserting a grouting pipe for grouting into the hole and firmly welding; welding seal plates, namely welding the seal plates in an annular structure at the end parts of the original water-cooling tubes; inserting a new water-cooling pipe into the original water-cooling pipe from an inner hole of the sealing plate in a penetrating manner, and then welding the sealing plate and the new water-cooling pipe; and grouting material into an annular cavity enclosed between the original water-cooled pipe and the new water-cooled pipe. The invention solves the problem that the water cooling pipe is difficult to be replaced in a large range in the construction process by inserting a new water cooling pipe into the damaged water cooling pipe, sealing and injecting high-heat-conduction pressure slurry into the damaged water cooling pipe to fill the gap between the inner pipeline and the outer pipeline, replaces the damaged water cooling pipe in a large range on the premise of not damaging the original structure and the refractory material, and minimizes the adverse effect on the integral heat conduction effect of the water cooling pipe after replacement.)

1. A method for passing a water-cooled tube at the bottom of a blast furnace is characterized by comprising the following steps:

a tubing positioning step, namely, drilling a hole on the damaged original water-cooled tube, inserting a grouting tube for grouting into the hole and firmly welding;

welding seal plates, namely welding the seal plates in an annular structure at the end parts of the original water-cooling tubes;

a new water-cooling pipe positioning step, namely, after a new water-cooling pipe penetrates through an inner hole of a sealing plate and is inserted into the original water-cooling pipe, welding the sealing plate and the new water-cooling pipe;

and grouting, namely grouting into a ring cavity enclosed between the original water-cooling pipe and the new water-cooling pipe.

2. The method for passing water-cooled tubes through the bottom of a blast furnace as claimed in claim 1,

in the sealing plate welding step, before the sealing plate is welded, the position of the sealing plate is adjusted until the axis of the sealing plate is consistent with the axis of the original water-cooling tube, so that the axis of the new water-cooling tube is consistent with the axis of the original water-cooling tube.

3. The method for passing water-cooled tubes through the bottom of a blast furnace as claimed in claim 1 or 2,

in the pipe positioning step, after the welding seam is cooled, a ball valve is arranged on the grouting pipe to control the on-off of the grouting pipe.

4. The method for threading the water-cooled tube at the bottom of the blast furnace as recited in claim 1 or 2, wherein the pressure slurry is a high thermal conductivity pressure slurry.

5. A blast furnace bottom water-cooling pipe penetrating structure, which is characterized in that,

a new water cooling pipe is arranged inside the damaged original water cooling pipe and is coaxial with the original water cooling pipe;

sealing plates are arranged at the staggered positions of the original water-cooled tube and the new water-cooled tube and used for sealing a cavity formed by enclosing the original water-cooled tube and the new water-cooled tube;

the original water-cooled tube is provided with a grouting material tube for filling grouting material into the cavity, so that the cavity enclosed between the original water-cooled tube and the new water-cooled tube is filled with grouting material.

6. The blast furnace bottom water-cooling pipe penetration structure according to claim 5,

and the grouting pipe is provided with a ball valve for controlling the on-off of the grouting pipe.

7. The blast furnace bottom water-cooling pipe penetration structure according to claim 5 or 6,

the original water-cooling pipe is provided with a through hole for inserting the grouting pipe.

8. The blast furnace bottom water-cooling pipe penetrating structure according to claim 5 or 6, wherein a high heat conduction layer is arranged between the original water-cooling pipe and the new water-cooling pipe.

9. The blast furnace bottom water-cooling pipe penetrating structure of claim 5 or 6, wherein the mudjacking pipe and the original water-cooling pipe are fixed by welding.

10. The blast furnace bottom water-cooling pipe penetration structure according to claim 5 or 6,

and the original water-cooled tube and the seal plate, and the new water-cooled tube and the seal plate are fixed by welding.

Technical Field

The invention relates to the technical field of blast furnace water cooling pipes, in particular to a method and a structure for passing a water cooling pipe at the bottom of a blast furnace.

Background

When the blast furnace produces molten iron, the furnace body and the lower part of the furnace body need to be cooled. The cooling of the blast furnace body is completed by hundreds of blast furnace cooling walls. The cooling wall of blast furnace is made of cast iron, and its cooling function is realized by means of water cooling through several cooling water pipes in its interior. After the water cooling pipe cast in the cooling wall body of the blast furnace is used for a long time, the cooling water pipe is damaged, water cannot be supplied for cooling or cooling water is leaked, so that the temperature of an outer furnace skin of the blast furnace is overhigh, namely the phenomenon that the outer furnace skin of the blast furnace is 'seen red', water is leaked into the blast furnace, and the normal production of the blast furnace is seriously influenced.

At present, in the prior art, a method for repairing a water cooling pipe of a cooling wall of a blast furnace is to replace the water cooling pipe of the blast furnace; however, blast furnace water cooling pipes are difficult to replace after being damaged due to various reasons.

Disclosure of Invention

In view of the above, the invention provides a method and a structure for passing a water-cooling pipe at the bottom of a blast furnace, and aims to solve the problem that the water-cooling pipe of the blast furnace is difficult to replace after being damaged due to various reasons.

On one hand, the invention provides a method for passing a water-cooled tube at the bottom of a blast furnace, which comprises the following steps: a tubing positioning step, namely, drilling a hole on the damaged original water-cooled tube, inserting a grouting tube for grouting into the hole and firmly welding; welding seal plates, namely welding the seal plates in an annular structure at the end parts of the original water-cooling tubes; a new water-cooling pipe positioning step, namely, after a new water-cooling pipe penetrates through an inner hole of a sealing plate and is inserted into the original water-cooling pipe, welding the sealing plate and the new water-cooling pipe; and grouting, namely grouting into a ring cavity enclosed between the original water-cooling pipe and the new water-cooling pipe.

Further, in the method for penetrating the water-cooled tube at the bottom of the blast furnace, in the sealing plate welding step, before the sealing plate is welded, the position of the sealing plate is adjusted until the axis of the sealing plate is consistent with the axis of the original water-cooled tube, so that the axis of the new water-cooled tube is consistent with the axis of the original water-cooled tube.

Further, according to the method for penetrating the water-cooled tube at the bottom of the blast furnace, in the step of positioning the tube, after the welding seam is cooled, a ball valve is arranged on the mud jacking tube so as to control the connection and disconnection of the mud jacking tube.

Further, in the method for penetrating the water-cooled tube at the bottom of the blast furnace, the pressure slurry is high-heat-conductivity pressure slurry.

According to the method for penetrating the water-cooling pipe at the bottom of the blast furnace, provided by the invention, the problem that the water-cooling pipe is difficult to replace in a large range after being damaged in the construction process is solved by inserting a new water-cooling pipe into the damaged water-cooling pipe, then sealing and injecting high-heat-conduction pressure slurry into the damaged water-cooling pipe to fill the gap between the inner pipeline and the outer pipeline, the damaged water-cooling pipe is replaced in a large scale on the premise of not damaging the original structure and the refractory material, and the adverse effect on the overall heat conduction effect of the water-cooling pipe after replacement can be minimized.

On the other hand, the invention also provides a tube penetrating structure of the water-cooling tube at the bottom of the blast furnace, wherein a new water-cooling tube is arranged inside the damaged original water-cooling tube and is coaxially arranged with the original water-cooling tube; sealing plates are arranged at the staggered positions of the original water-cooled tube and the new water-cooled tube and used for sealing a cavity formed by enclosing the original water-cooled tube and the new water-cooled tube; the original water-cooled tube is provided with a grouting material tube for filling grouting material into the cavity, so that the cavity enclosed between the original water-cooled tube and the new water-cooled tube is filled with grouting material.

Further, according to the blast furnace bottom water-cooling pipe penetrating structure, the mud jacking pipe is provided with the ball valve for controlling the on-off of the mud jacking pipe.

Furthermore, according to the blast furnace bottom water-cooling pipe penetrating structure, the original water-cooling pipe is provided with a through hole for inserting the mud jacking pipe.

Further, according to the blast furnace bottom water-cooling pipe penetrating structure, a high heat conduction layer is arranged between the original water-cooling pipe and the new water-cooling pipe.

Further, in the blast furnace bottom water-cooling pipe penetrating structure, the mud jacking pipe and the original water-cooling pipe are fixed by welding.

Further, in the blast furnace bottom water-cooling pipe penetrating structure, the original water-cooling pipe and the seal plate, and the new water-cooling pipe and the seal plate are fixed by welding.

According to the through pipe structure of the water cooling pipe at the bottom of the blast furnace, the new water cooling pipe is inserted into the original water cooling pipe, the insertion of the new water cooling pipe is guided and limited through the sealing plate, and meanwhile, the cavity between the original water cooling pipe and the new water cooling pipe is sealed, so that the way of filling the gap between the inner pipeline and the outer pipeline by injecting the pressure slurry into the cavity through the pressure slurry pipe on the original water cooling pipe is realized, the pipe wall of the new water cooling pipe and the pipe wall of the original water cooling pipe are tightly combined, the influence of the gap on the heat conductivity of cooling water is avoided, the problem that the damaged water cooling pipe is difficult to replace in a large range after being damaged in the construction process is solved, the damaged water cooling pipe is replaced in a large scale on the premise of not damaging the original structure and refractory materials, and the adverse effect on the whole heat conduction effect of the water cooling pipe after replacement can be minimized.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a block flow diagram of a method for threading a water-cooled tube at the bottom of a blast furnace according to an embodiment of the present invention;

FIG. 2 is a layout diagram of a water-cooling pipe penetrating pipe at the bottom of a blast furnace provided by the embodiment of the invention;

FIG. 3 is a structural schematic diagram of a water-cooling tube penetrating structure at the bottom of a blast furnace provided by the embodiment of the invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The method comprises the following steps:

referring to fig. 1, it is a block flow diagram of a method for passing a water-cooling pipe through a bottom of a blast furnace according to an embodiment of the present invention. As shown, the method comprises the following steps:

a pipe arrangement positioning step S1, holes are formed on the damaged original water-cooling pipes, and grouting pipes for grouting are inserted into the holes and are welded firmly; and after the welding seam is cooled, installing a ball valve on the grouting pipe to control the on-off of the grouting pipe.

Specifically, as shown in fig. 2, first, holes are formed at two sides of an end portion (left end as shown in fig. 2) of the damaged original water-cooling pipe, that is, at two sides of a connection end portion of two original water-cooling pipes, or holes may be formed at other positions, which is not limited in this embodiment; then, inserting a grouting pipe for grouting into the hole, and then welding the grouting pipe to the hole of the original water-cooling pipe and firmly welding; and finally, after the to-be-welded joint is cooled, installing a ball valve on the grouting pipe to control the on-off of the grouting pipe.

And a sealing plate welding step S2, welding a sealing plate in an annular structure at the end position of the original water-cooling tube, and adjusting the position of the sealing plate before welding the sealing plate until the axis of the sealing plate is consistent with the axis of the original water-cooling tube, so that the axis of the new water-cooling tube is consistent with the axis of the original water-cooling tube.

Specifically, sealing plates are welded at the end positions of the original water-cooling pipes (the right ends shown in fig. 2), namely staggered positions of the original water-cooling pipes and the new water-cooling pipes; guarantee the shrouding as far as possible during welding unanimously with the central line of original water-cooled tube, promptly before the welding shrouding, the position of adjustment shrouding, the axis of up to the shrouding is unanimous with the axis of original water-cooled tube, so that the axis of new water-cooled tube is unanimous with the axis of original water-cooled tube, can guarantee as far as possible that new water-cooled tube cross-section circle is the concentric circle with having damaged water-cooled tube cross-section circle promptly when the poling, the mud jacking material of pouring into afterwards just can be at intraductal evenly distributed, reduce the influence to water-cooled tube heat conduction effect in the at utmost. The sealing plate can be of an annular structure, the outer diameter of the sealing plate is larger than or equal to that of the original water-cooling pipe, and the inner diameter of the sealing plate is slightly equal to that of the new water-cooling pipe, so that the new water-cooling pipe can penetrate through the inner hole of the annular structure and can be welded and fixed with the inner hole of the annular structure.

And S3, inserting the new water-cooling pipe into the original water-cooling pipe through the inner hole of the sealing plate, and welding the sealing plate and the new water-cooling pipe.

Specifically, firstly, a new water cooling pipe is inserted into the damaged original water cooling pipe through an inner hole of the sealing plate; and then, after the new water-cooling pipe is installed in place, the sealing plate and the new water-cooling pipe are firmly welded.

And a grouting step S4, namely grouting material into an annular cavity enclosed between the original water-cooled pipe and the new water-cooled pipe.

Specifically, after the welded seam in the new water-cooled tube in-place step S3 is cooled, the ball valve is opened, and grouting material is poured into the damaged water-cooled tube, so that the grouting material is filled into the annular cavity enclosed between the original water-cooled tube and the new water-cooled tube, and can be compacted to form heat conduction layers uniformly distributed in the tube. Wherein, the magma material is high heat conduction magma material to make the pipe wall of original water-cooled tube and new water-cooled tube combine closely, avoid the heat conductivity that the clearance influences the cooling water.

In summary, the method for passing the water-cooling pipe at the bottom of the blast furnace provided by the embodiment solves the problem that the damaged water-cooling pipe is difficult to replace in a large range in the construction process by inserting a new water-cooling pipe into the damaged water-cooling pipe and then sealing and injecting high-heat-conduction pressure slurry into the damaged water-cooling pipe to fill the gap between the inner pipeline and the outer pipeline, the damaged water-cooling pipe is replaced in a large scale on the premise of not damaging the original structure and the refractory material, and the adverse effect on the overall heat conduction effect of the water-cooling pipe after replacement can be minimized.

The structure embodiment is as follows:

referring to fig. 3, it is a schematic structural diagram of a water-cooling tube penetrating structure at the bottom of a blast furnace provided by an embodiment of the invention. As shown in the figure, the damaged original water-cooling pipe 1 is provided with a new water-cooling pipe 4 inside, which is arranged coaxially with the original water-cooling pipe 1. Specifically, the pipe diameter of the new water cooling pipe 4 is smaller than the pipe diameter of the original water cooling pipe 1, so that the new water cooling pipe 4 is arranged in the original water cooling pipe 1 in a penetrating manner to serve as a cooling water channel.

The wrong platform department of original water-cooled tube 1 and new water-cooled tube 4 is equipped with shrouding 3 for enclose the cavity of establishing formation between sealed original water-cooled tube 1 and the new water-cooled tube 4. Specifically, the sealing plate 3 is arranged at the end of the original water-cooled tube 1, and the sealing plate 3 may be in an annular structure, the outer diameter of the sealing plate 3 is greater than or equal to the outer diameter of the original water-cooled tube 1, and the inner diameter of the sealing plate is slightly equal to the outer diameter of the new water-cooled tube 4, so that the new water-cooled tube 4 can pass through the inner hole of the annular structure and the new water-cooled tube 4 and the sealing plate 3 are welded and fixed; shrouding 3 can seal for enclosing the cavity of establishing formation between original water-cooled tube 1 and the new water-cooled tube 4, can carry on spacingly to the poling of new water-cooled tube 4 simultaneously to make coaxial setting between original water-cooled tube 1 and the new water-cooled tube 4, and then make the mudjacking material of follow-up injection just can be at intraductal evenly distributed, reduce the influence to water-cooled tube heat conduction effect in the at utmost. Wherein, pass through welded fastening between original water-cooled tube 1 and the shrouding 3, between new water-cooled tube 4 and the shrouding 3 to ensure connection stability.

Be equipped with mud jacking pipe 2 on original water-cooled tube 1 for to pouring into mud jacking material in the cavity, so that the cavity that encloses between original water-cooled tube 1 and the new water-cooled tube 4 establishes is filled with mud jacking material. Specifically, a through hole is formed in the original water-cooling tube 1 and used for inserting the grouting tube 2; the grouting pipe 2 is inserted in a through hole of the original water-cooling pipe 1, and the grouting pipe 2 and the original water-cooling pipe 1 are fixed by welding to ensure the stability of the grouting pipe 2; the grouting pipe 2 can be used for filling grouting material into the cavity, so that the cavity enclosed between the original water-cooled pipe 1 and the new water-cooled pipe 4 is filled with grouting material, and a grouting material layer is formed between the original water-cooled pipe 1 and the new water-cooled pipe 4; this pressure slurry material can be for high heat conduction pressure slurry material, is equipped with high heat-conducting layer between original water-cooled tube 1 and the new water-cooled tube 4 promptly to fill the clearance between new water-cooled tube 4 and the original water-cooled tube 1, make the pipe wall of new water-cooled tube 4 and original water-cooled tube 1 combine closely, avoid the heat conductivity that the space influences the cooling water. The number of the mud jacking pipes 3 is two, and the mud jacking pipes are respectively arranged on two sides of the original water-cooling pipe 1 along the radial direction of the original water-cooling pipe 1.

To sum up, the blast furnace stove bottom water-cooled tube poling structure that this embodiment provided, insert new water-cooled tube 4 in through original water-cooled tube 1, it is spacing to lead to the insertion of new water-cooled tube 4 through shrouding 3, seal the cavity between original water-cooled tube 1 and the new water-cooled tube 4 simultaneously, so that pour into the mode that the inside and outside pipeline clearance was filled to the cavity into the mud jacking material through mud jacking pipe 2 on original water-cooled tube 1, make the pipe wall of new water-cooled tube 4 and original water-cooled tube 1 combine closely, avoid the heat conductivity of space influence cooling water, in order to solve the problem that the water-cooled tube is difficult to change on a large scale after the damage in the work progress, the water-cooled tube that has damaged is changed on a large scale under the prerequisite of not destroying original structure and resistant material, and the adverse effect that produces the whole heat conduction effect of water-cooled tube after the change also can be reduced to minimum.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.