CN217816678U - Combined type dry quenching exhaust-heat boiler connecting pipeline - Google Patents

Abstract

The utility model discloses a modular dry coke quenching exhaust-heat boiler connecting line, including header tank and steam pipe, be provided with first superheated pipe section and second superheated pipe section on header tank and the steam pipe respectively, the port of first superheated pipe section is provided with transition coupling assembling with the port outside cladding of second superheated pipe section, transition coupling assembling includes the semi-ring cover that two amalgamations set up, first welding layer and first superheated pipe section fixed connection are passed through to the one end of semi-ring cover, the other end of semi-ring cover passes through second welding layer and second superheated pipe section fixed connection, pass through third welding layer fixed connection between the semi-ring cover. The utility model discloses an increased transition coupling assembling between first superheated pipe section and second superheated pipe section, can be so that the welded fastening effect between first superheated pipe section and the transition coupling assembling and between second superheated pipe section and the transition coupling assembling is more reliable, the effectual emergence of avoiding the pipe explosion condition has reduced and has maintained the number of times.

Description

Combined type dry quenching exhaust-heat boiler connecting pipeline

Technical Field

The utility model relates to a waste heat boiler technical field especially relates to a modular dry coke quenching waste heat boiler connecting line.

Background

For a coke dry quenching system of a coke plant, a dry quenching furnace and a waste heat boiler are used in a matched manner, the dry quenching furnace extinguishes red coke and simultaneously generates a large amount of high-temperature flue gas, the flue gas enters the waste heat boiler to exchange heat with a pipe group filled with water to generate a large amount of high-temperature steam, as shown in figures 1 and 2, in the working process, the high-temperature steam is collected in a centralized manner into a collecting box 1-1, the collecting box 1-1 is a long structure arranged along the horizontal direction, steam pipelines 1-2 are arranged beside the collecting box in parallel, the collecting box 1-1 is communicated with the steam pipelines 1-2 through superheater pipes, a plurality of superheater pipes are uniformly arranged along the axial direction of the steam pipelines 1-2 at intervals, the high-temperature steam collected in the collecting box 1-1 enters the steam pipelines 1-2 through the superheater pipes, and the steam pipelines convey the high-temperature steam to subsequent equipment.

In the above structure, the superheater tube comprises a first tube section 1-3 welded and fixed on the header 1-1 and a second tube section 1-4 welded and fixed on the steam tube 1-2, and the first tube section 1-3 is welded with the second tube section 1-4, wherein the header 1-1 and the first tube section 1-3 are both made of 20G steel, and the two are made of the same material, so that a stable and reliable welding and fixing effect can be achieved, and the steam tube 1-2 and the second tube section 1-4 are both made of stainless steel, so that the two can also achieve a stable and reliable welding and fixing effect, but for the welding and fixing between the first tube section 1-3 and the second tube section 1-4, although relatively stable connection can be achieved during the welding and fixing, since the material of the 20G steel is different from the stainless steel, problems easily occur in the position of the welding interface in the later use process, which causes problems such as tube explosion and the like, need to be shut down for maintenance, and normal production order is affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims to avoid the shortcomings of the prior art and provide a combined coke dry quenching exhaust-heat boiler connecting pipeline, thereby effectively solving the shortcomings existing in the prior art.

In order to achieve the above purpose, the utility model adopts the technical proposal that: a first superheating pipe section and a second superheating pipe section are arranged on the collection tank and the steam pipeline respectively, a transition connecting assembly is arranged on the outer side of the port of the first superheating pipe section and the outer side of the port of the second superheating pipe section in a wrapping mode, the transition connecting assembly comprises two half rings which are arranged in a splicing mode, one end of each half ring is fixedly connected with the first superheating pipe section through a first welding layer, the other end of each half ring is fixedly connected with the second superheating pipe section through a second welding layer, the half rings are fixedly connected through a third welding layer, a protruding portion is arranged in the middle of each half ring, and a gap allowing the protruding portion to enter is formed between the first superheating pipe section and the second superheating pipe section.

Furthermore, the first superheating pipe section is made of 20G steel, the second superheating pipe section is made of stainless steel, and the semi-ring sleeve is made of 12Gr1MoV.

Furthermore, the end face of the semi-ring sleeve is of a slope structure.

Further, a V-shaped groove for accommodating the third welding layer 8 is formed between the half loops.

Further, the inner wall of the boss is flush with the inner walls of the first superheat tube section and the second superheat tube section.

Further, the clearance between the side surface of the convex part and the first superheat pipe section is 0.5-1mm, and the clearance between the side surface of the convex part and the second superheat pipe section is 0.5-1mm.

Further, the third welding layer extends from one end of the semi-loop to the other end.

The above technical scheme of the utility model following beneficial effect has: the utility model discloses an increased transition coupling assembling between first superheat section and second superheat section, through chooseing for use transition coupling assembling with first superheat section and the second superheat section material that is more close, can be so that the welded fastening effect between first superheat section and the transition coupling assembling and between second superheat section and the transition coupling assembling is more reliable, the effectual emergence of avoiding the pipe explosion condition, reduced and maintained the number of times, in addition, the utility model provides a structure can directly be reformed transform on the basis of current superheat tube structure and form, and application scope is wide.

Drawings

FIG. 1 is a schematic structural view of a superheater tube of a waste heat boiler in the prior art;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic structural diagram of an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is a schematic perspective view of FIG. 3;

fig. 7 is an exploded view of fig. 6.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, rather than to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

As shown in fig. 3 to 7, the connection pipeline of the combined coke dry quenching exhaust-heat boiler according to the embodiment includes a header 1 and a steam pipeline 2, the header 1 and the steam pipeline 2 are respectively provided with a first superheating pipe section 3 and a second superheating pipe section 4, wherein the first superheating pipe section 3 and the second superheating pipe section 4 are respectively made of 20G steel and stainless steel, a transition connection assembly is wrapped on the outer sides of the port of the first superheating pipe section 3 and the port of the second superheating pipe section 4, the transition connection assembly includes two half ring sleeves 5 which are spliced together, the inner surfaces of the half ring sleeves 5 are attached to the outer surfaces of the first superheating pipe section 3 and the second superheating pipe section 4, one end of the half ring sleeve 5 is fixedly connected with the first overheating pipe section 3 through the first welding layer 6, the other end of the half ring sleeve 5 is fixedly connected with the second overheating pipe section 4 through the second welding layer 7, the first welding layer 6 and the second welding layer 7 are both of an annular structure, the half ring sleeve is used for realizing the sealing fixation of the two ends of the half ring sleeve 5, the half ring sleeve 5 is fixedly connected with the third welding layer 8, the third welding layer 8 is extended to the other end from one end of the half ring sleeve 5, and therefore under the matching of the first welding layer 6, the second welding layer 7 and the third welding layer 8, the first overheating pipe section 3, the second overheating pipe section 4 and the transition connecting assembly can be stably and reliably connected.

In this embodiment, the material of half collar 5 is 12Gr1MoV, through above-mentioned structure, with the direct weld between 20G steel material and the stainless steel material in the traditional structure, changed into the welding between 20G steel material and 12Gr1MoV material and the welding between stainless steel material and 12Gr1MoV material, the nature between the welding thing is closer, realizes reliable sealed effect more easily, great improvement the reliability of equipment.

Half ring cover 5's middle part is provided with bellying 501, be provided with the clearance that can supply bellying 501 to get into between first superheated pipe section 3 and the second superheated pipe section 4, can fix a position tentatively to half ring cover 5's axial position through setting up bellying 501 one, it is enough to guarantee the contact surface between half ring cover 5 and first superheated pipe section 3 and the second superheated pipe section 4, the reliability of improvement structure, on the other hand can provide the structure basis for the transformation of old structure.

As shown in fig. 4, the end surface of the half collar 5 has a slope structure, which enables the first welding layer 6 and the second welding layer 7 to have a more reliable fixing effect on the half collar 5.

As shown in fig. 5, a V-shaped groove for accommodating the third welding layer 8 is formed between the half rings 5, so that the contact area between the third welding layer 8 and the two half rings 5 can be further increased, and the reliability of the structure can be further improved.

The inner walls of the bosses 501 are flush with the inner walls of the first and second superheat tube sections 3, 4.

The clearance between the side face of the convex part 501 and the first superheating pipe section 3 is 0.5-1mm, the clearance between the side face of the convex part 501 and the second superheating pipe section 4 is 0.5-1mm, and a small amount of clearance is arranged, so that the semi-ring sleeve 5 is more favorably mounted.

The utility model provides a structure can directly reform transform on the basis of old structure and form, and the method of reforming transform is: according to the axial thickness of the protruding portion 501, a gap between the first overheating pipe section 3 and the second overheating pipe section 4 is determined, then the end portions of the first overheating pipe section 3 and the second overheating pipe section 4 are cut off through cutting equipment, after the cut is polished to be flat, the two half ring sleeves 5 are buckled on the first overheating pipe section 3 and the second overheating pipe section 4, initial fixing is achieved through spot welding, and after the problem does not exist in checking, construction of the third welding layer 8, the first welding layer 6 and the second welding layer 7 is conducted according to the method.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims (7)

1. The utility model provides a modular dry coke quenching exhaust-heat boiler connecting line, includes header and steam pipe, is provided with first superheated pipe section and second superheated pipe section, its characterized in that on header and the steam pipe respectively: the transition connection assembly comprises two half-ring sleeves which are spliced, one ends of the half-ring sleeves are fixedly connected with the first superheating pipe section through first welding layers, the other ends of the half-ring sleeves are fixedly connected with the second superheating pipe section through second welding layers, the half-ring sleeves are fixedly connected with each other through third welding layers, a protruding portion is arranged in the middle of each half-ring sleeve, and a gap for the protruding portion to enter is formed between each first superheating pipe section and each second superheating pipe section.

2. The combined type dry quenching waste heat boiler connecting pipeline as claimed in claim 1, characterized in that: the first superheating pipe section is made of 20G steel, the second superheating pipe section is made of stainless steel, and the semi-ring sleeve is made of 12Gr1MoV.

3. The combined type dry quenching waste heat boiler connecting pipeline as claimed in claim 1, characterized in that: the end surface of the semi-ring sleeve is of a slope structure.

4. The combined type dry quenching waste heat boiler connecting pipeline as claimed in claim 1, characterized in that: a V-shaped groove for accommodating the third welding layer 8 is formed between the half loops.

5. The combined type dry quenching waste heat boiler connecting pipeline as claimed in claim 1, characterized in that: the inner wall of the boss is flush with the inner walls of the first superheat tube section and the second superheat tube section.

6. The combined type dry quenching waste heat boiler connecting pipeline as claimed in claim 1, characterized in that: the clearance between the side surface of the convex part and the first superheater tube section is 0.5-1mm, and the clearance between the side surface of the convex part and the second superheater tube section is 0.5-1mm.

7. The combined type dry quenching waste heat boiler connecting pipeline as claimed in claim 1, characterized in that: the third welding layer extends from one end of the semi-loop to the other end.

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