Leakage stopper for pipeline welding seam of grouting hole of blast furnace
By using extruded sealing materials of positioning sleeves and leak plug splicing units on the welds of the blast furnace grouting hole pipes, the air leakage problem caused by poor welding quality is solved, ensuring the safe production and thermal insulation effect of the blast furnace.
Patent Information
- Application Number
- CN202421120924.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-21
AI Technical Summary
During the production process of iron smelting blast furnace, due to construction quality, operation and material performance, local heating and gas leakage of the furnace belly and body, affecting production safety. The quality of welding grouting short pipes is difficult to guarantee, resulting in the repaired furnace. The shell is prone to air leakage.
Design a leak plug that includes a positioning sleeve and a leak plug splicing unit. Using a compressed sealing material of a hard jacket and a soft inner lining, the sealing material is ensured to be tightly attached through the extrusion of the positioning sleeve and the leak plug splicing unit. Welding seams form sealing structures to prevent air leakage.
Effectively seal the welds, ensure complete grouting, protect the furnace wall insulation, and improve the safety and operation reliability of the blast furnace.
Smart Images
Figure CN222277877U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of iron-making blast furnaces, in particular to a leak stopper for welding seams of pipelines of grouting holes of blast furnaces. Background Art
[0002] After a period of production, the furnace shell of the iron-making blast furnace will be heated or even red-hot in some places due to factors such as construction quality, production operation, and material properties. In some places, there will even be gas leakage, which will lead to the deterioration of the operating environment in front of the furnace, which will directly affect the safe production of the blast furnace. In this damaged situation, in order to prevent hot spots and cracks in the furnace shell and ensure the safe production of the blast furnace, grouting repair and maintenance must be carried out. That is, during the blast furnace shutdown period, the blast furnace grouting material is pressed into the damaged part of the blast furnace with a high-pressure pump to reline and form a new insulation layer to protect the furnace shell. The specific process is: opening a grouting hole, welding a grouting short pipe, connecting a high-temperature ball valve, starting a grouting pump to press in the slurry, and closing the ball valve to seal the slurry.
[0003] In the above process, the welding of grouting short pipes is prone to quality problems. Due to the large number of pipes outside the blast furnace and limited operating space, the grouting welding short pipes can only be blind welded locally, which cannot guarantee the welding quality. Once the welding quality is poor, the grouting will not be solid, causing leakage in the repaired furnace shell, thus affecting safety. Utility Model Content
[0004] The utility model aims at the deficiencies of the prior art and provides a leak stopper which can seal the entire weld and prevent air leakage caused by welding defects.
[0005] The utility model provides a leak plugging device for the weld of a blast furnace grouting hole pipeline, comprising: a positioning sleeve and a leak plugging device splicing unit; the positioning sleeve is in a circular ring shape, and its inner diameter matches the outer diameter of a grouting welding short pipe, the positioning sleeve is sleeved on the outer surface of the grouting welding short pipe, the grouting welding short pipe is welded to a furnace wall, and a weld is provided at a position where the grouting welding short pipe is welded to the furnace wall; the cross section of the leak plugging device splicing unit is semicircular, and two opposite leak plugging device splicing units are spliced to form a tubular structure whose inner diameter matches the outer diameter of the grouting welding short pipe; the distance between the position where the positioning sleeve is connected to the grouting welding short pipe and the furnace wall is equal to the length of the leak plugging device splicing unit; wherein the inner side of the leak plugging device splicing unit has a compression sealing material, and the compression sealing material is used to seal the weld.
[0006] Furthermore, the leak stopper splicing unit includes a hard outer shell and a soft inner liner, wherein the soft inner liner is attached to the inner side of the hard outer shell, and the soft inner liner is made of a compressed sealing material.
[0007] Furthermore, one end of the leak stopper splicing unit is connected to the positioning sleeve through the hard outer shell, and the other end is fitted to the furnace wall and the weld through the soft inner lining.
[0008] Furthermore, the positioning sleeve has a first guide bevel on the side facing the leak plugging device splicing unit, and the hard outer shell of the leak plugging device splicing unit has a second guide bevel matching the first guide bevel, wherein the first guide bevel faces the outer side of the grouting welded short tube, and the second guide bevel faces the inner side of the grouting welded short tube.
[0009] Furthermore, the soft lining has a butt-jointing bevel on one side facing the weld.
[0010] Furthermore, the hard outer shell is made of metal.
[0011] Furthermore, the soft lining is made of rubber.
[0012] Furthermore, the axial edges on both sides of the leak plugging device splicing unit have connecting holes arranged in pairs, and the two opposite leak plugging device splicing units are bolted together through the connecting holes.
[0013] Furthermore, the inner surface of the soft lining has a strip grid.
[0014] Furthermore, the positioning sleeve is made of metal and is connected to the grouting welding short pipe by spot welding.
[0015] Compared with the prior art, the utility model has the following beneficial effects:
[0016] The utility model utilizes the positioning and splicing extrusion effect of the positioning sleeve and the leak stopper splicing unit to compress and position the compressed sealing material in the leak stopper splicing unit to the weld between the grouting welding short pipe and the furnace wall, thereby ensuring the sealing performance of the weld, so that the grouting is complete, and the heat insulation layer formed in the furnace wall can completely protect the furnace shell, thereby achieving a good effect of preventing gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 This is an assembly structure diagram of a leak stopper for a blast furnace grouting hole pipeline weld according to an embodiment of the utility model;
[0019] Figure 2 This is a schematic diagram of the main structure of the splicing unit of the leak stopper according to the embodiment of the utility model;
[0020] Figure 3 for Figure 2 Sectional view of section AA;
[0021] Figure 4 It is a three-dimensional structural schematic diagram of the splicing unit of the leak stopper according to the embodiment of the utility model;
[0022] Figure 5 This is a schematic diagram of the structure of a leak stopper for a blast furnace grouting hole pipeline weld according to an embodiment of the utility model;
[0023] Figure 6 for Figure 5 Partial cross-sectional view of section BB.
[0024] The accompanying drawings are marked as:
[0025] 1: Positioning sleeve; 2: Leak stopper splicing unit; 21: Hard outer jacket; 22: Soft inner lining; 23: Connecting hole; 3: Grouting welding short pipe; 4: Furnace wall; 5: Welding seam; 6: Bolt. DETAILED DESCRIPTION
[0026] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0029] The iron-making blast furnace is an important equipment in steel production. It has the characteristics of high labor productivity and large production volume. It is widely used in countries all over the world. When the iron-making blast furnace is working, iron ore, coke and solvent are put into the blast furnace through the furnace mouth. The preheated air burns with the carbon in the high-temperature coke to remove the oxygen in the iron ore and reduce it to obtain iron. The molten iron is released from the iron mouth.
[0030] After a period of production, the furnace shell of the iron-making blast furnace will be heated or even red-hot in some places due to factors such as construction quality, production operation, and material properties. In some places, there will even be gas leakage, which will lead to the deterioration of the operating environment in front of the furnace, which will directly affect the safe production of the blast furnace. In this damaged situation, in order to prevent hot spots and cracks in the furnace shell and ensure the safe production of the blast furnace, grouting repair and maintenance must be carried out. That is, during the blast furnace shutdown period, the blast furnace grouting material is pressed into the damaged part of the blast furnace with a high-pressure pump to reline and form a new insulation layer to protect the furnace shell. The specific process is: opening a grouting hole, welding a grouting short pipe, connecting a high-temperature ball valve, starting a grouting pump to press in the slurry, and closing the ball valve to seal the slurry.
[0031] During the above process, quality problems are likely to occur in the welding of grouting short pipes. Since there are many pipelines outside the blast furnace and the operating space is limited, the grouting welded short pipes can only be blind welded locally, which makes it impossible to guarantee the welding quality. If the grouting is not solid, it will cause serious leakage, affecting safety and operation.
[0032] Therefore, the utility model provides a leak stopper which can seal the entire weld and prevent gas leakage caused by welding defects.
[0033] like Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, an embodiment of the utility model provides a leak stopper for the weld of a blast furnace grouting hole pipeline, comprising a positioning sleeve 1 and a leak stopper splicing unit 2. The positioning sleeve 1 is in the shape of a circular ring, and its inner diameter matches the outer diameter of a grouting welding short pipe 3. The positioning sleeve 1 is sleeved on the outer surface of the grouting welding short pipe 3, and the grouting welding short pipe 3 is welded to the furnace wall 4. The position where the grouting welding short pipe 3 is welded to the furnace wall 4 has a weld 5. The cross section of the leak stopper splicing unit 2 is semicircular, and two opposite leak stopper splicing units 2 are spliced to form a tubular structure whose inner diameter matches the outer diameter of the grouting welding short pipe 3. The distance between the position where the positioning sleeve 1 is connected to the grouting welding short pipe 3 and the furnace wall 4 is equal to the length of the leak stopper splicing unit 2.
[0034] like Figure 3 and Figure 4 As shown, in a specific embodiment, the plugging device splicing unit 2 includes a hard outer shell 21 and a soft inner liner 22, the soft inner liner 22 is attached to the inner side of the hard outer shell 21, and the soft inner liner 22 is made of a compressed sealing material, and the compressed sealing material is used to seal the weld 5. One end of the plugging device splicing unit 2 is connected to the positioning sleeve 1 through the hard outer shell 21, and the other end is attached to the furnace wall 4 and the weld 5 through the soft inner liner 22.
[0035] Preferably, the positioning sleeve 1 has a first guiding bevel on the side facing the plugging device splicing unit 2, and the hard outer shell 21 of the plugging device splicing unit 2 has a second guiding bevel matching the first guiding bevel, wherein the first guiding bevel faces the outside direction of the grouting welding short pipe 3, and the second guiding bevel faces the inside direction of the grouting welding short pipe 3. The design of the guiding bevel is conducive to strengthening the guidance and compression of the compressed sealing material during the assembly process of the plugging device splicing unit 2, and is conducive to the formation of the sealing structure.
[0036] Preferably, the soft lining 22 has a butt-jointed bevel on the side facing the weld 5. The butt-jointed bevel matches the weld 5, which is conducive to the soft lining 22 fitting the weld 5. Specifically, the hard outer shell 21 is made of metal, and the soft lining 22 is made of rubber.
[0037] like Figure 3 As shown, the axial edges of both sides of the plugging device splicing unit 2 have connecting holes 23 arranged in pairs, and the two opposite plugging device splicing units 2 are bolted together through the connecting holes 23. The specific connection method is to insert the bolts 6 into the connecting holes 23. The plugging device splicing units 2 are spliced through the connecting holes 23 by bolt connection, so that a pair of plugging device splicing units 2 are gradually pressed, and the soft lining 22 inside them completes the sealing of the weld 5, which has a simple structure and is easy to operate and use.
[0038] Preferably, the inner surface of the soft liner 22 has a strip grid. The soft liner 22 is made of sealing material, and the strip grid can provide a certain compression space for the sealing material, which is conducive to its full deformation, close to the grouting welding short pipe 3 and the weld 5, and further improve the sealing effect.
[0039] When the utility model is used, the positioning sleeve 1 is first connected to the grouting welding short pipe 3. For the convenience of connection, spot welding can be used. At the same time, it is necessary to ensure that the distance between the position of the positioning sleeve 1 and the furnace wall 4 is equal to the length of the plugging device splicing unit 2. The plugging device splicing unit 2 is installed between the positioning sleeve 1 and the furnace wall 4 by splicing. During the splicing process, the compressed sealing material inside the plugging device splicing unit 2 is squeezed, so that the compressed sealing material seals the weld 5. Thereby ensuring the sealing performance of the weld 5, achieving a good effect of preventing gas leakage.
[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A leak stopper for the weld of a blast furnace grouting hole pipeline, characterized in that: include: A positioning sleeve (1) and a leak stopper splicing unit (2); The positioning sleeve (1) is in the shape of a circular ring, and its inner diameter matches the outer diameter of the grouting welded short tube (3). The positioning sleeve (1) is sleeved on the outer surface of the grouting welded short tube (3). The grouting welded short tube (3) is welded to the furnace wall (4). The position where the grouting welded short tube (3) is welded to the furnace wall (4) has a weld seam (5); The cross section of the plugging device splicing unit (2) is semicircular, and two opposite plugging device splicing units (2) are spliced together to form a tubular structure whose inner diameter matches the outer diameter of the grouting welding short pipe (3); The distance between the position where the positioning sleeve (1) is connected to the grouting welding short pipe (3) and the furnace wall (4) is equal to the length of the leak stopper splicing unit (2); The inner side of the leak stopper splicing unit (2) has a compressible sealing material, and the compressible sealing material is used to seal the weld (5).
2. The leak stopper for the weld of the blast furnace grouting hole pipeline according to claim 1 is characterized in that: The leak stopper splicing unit (2) comprises a hard outer shell (21) and a soft inner liner (22), wherein the soft inner liner (22) is attached to the inner side of the hard outer shell (21), and the soft inner liner (22) is made of a compressed sealing material.
3. The leak stopper for the weld of the blast furnace grouting hole pipeline according to claim 2 is characterized in that: One end of the leak stopper splicing unit (2) is connected to the positioning sleeve (1) through the hard outer shell (21), and the other end is fitted to the furnace wall (4) and the weld (5) through the soft inner lining (22).
4. The leak stopper for the weld of the blast furnace grouting hole pipeline according to claim 3 is characterized in that: The positioning sleeve (1) has a first guiding bevel on the side facing the leak stopper splicing unit (2), and the hard outer shell (21) of the leak stopper splicing unit (2) has a second guiding bevel matching the first guiding bevel, wherein the first guiding bevel faces the outer side of the grouting welded short pipe (3), and the second guiding bevel faces the inner side of the grouting welded short pipe (3).
5. The leak stopper for the weld of the blast furnace grouting hole pipeline according to claim 3 is characterized in that: The soft lining (22) has a butt-jointing slope on the side facing the weld (5).
6. The leak stopper for the weld of the blast furnace grouting hole pipeline according to claim 3 is characterized in that: The hard outer shell (21) is made of metal.
7. The leak stopper for the weld of the blast furnace grouting hole pipeline according to claim 3 is characterized in that: The soft lining (22) is made of rubber.
8. The leak stopper for the weld of the blast furnace grouting hole pipeline according to claim 3 is characterized in that: The axial edges on both sides of the leak stopper splicing unit (2) are provided with connecting holes (23) arranged in pairs, and the two opposite leak stopper splicing units (2) are bolted together through the connecting holes (23).
9. The leak stopper for the weld of the blast furnace grouting hole pipeline according to claim 3 is characterized in that: The inner surface of the soft lining (22) is provided with a strip-shaped grid.
10. The leak stopper for the weld of the blast furnace grouting hole pipeline according to any one of claims 1 to 9, characterized in that: The positioning sleeve (1) is made of metal and is connected to the grouting welding short pipe (3) by spot welding.