Structure for eliminating waist collapse of large water beam of shaft furnace

Abstract

The utility model discloses a structure for eliminating waist collapse of a large water beam of a shaft furnace, which belongs to the field of air guide walls of the shaft furnace and comprises an air guide wall, a large water beam jacket, two gearboxes and a hoisting structure, the large water beam jacket is arranged at the bottom of the air guide wall, and the gearboxes are respectively arranged on the left side and the right side of the air guide wall. Large water beam seamless steel pipes are arranged on the front face and the back face in the large water beam outer sleeve. The lifting structure comprises a lifting beam, a lifting ring, a connecting frame and a lifting structure. According to the structure for eliminating the waist collapse of the large water beam of the shaft furnace, the large water beam outer sleeve and the large water beam seamless steel pipe are arranged to be arched, the weight from an air guide wall can be borne, waist collapse deformation is resisted, the pull rod and the tray in the hoisting structure can pull the large water beam outer sleeve and the large water beam seamless steel pipe, and high-temperature creep deformation of metal is eliminated; and the large water beam seamless steel pipe is changed into a straight-through forced water circulation cooling mode, so that the cooling water can be effectively accelerated to take away the heat of the pipe wall.

Description

Technical Field

[0001] The utility model relates to the field of air guiding walls of shaft furnaces, in particular to a structure for eliminating the collapse of the large water beam of a shaft furnace. Background Technique

[0002] A shaft furnace refers to an ultra-high power electric arc furnace with a vertical furnace body, a shaft on the furnace cover, and preheating scrap steel in the shaft using the high-temperature waste gas discharged from the electric arc furnace. The furnace gas moves upward in the furnace and exchanges heat countercurrently with the furnace charge. In most shaft furnaces, the furnace charge is in direct contact with the fuel. Modern rectangular shaft furnaces for producing pellet ore basically adopt short-circuiting of the cooling air in the furnace, that is, an air guiding wall and a drying bed, which are directly connected refractory brick bodies up and down, commonly known as the air guiding wall.

[0003] The air guiding wall guides the cooling air to the center of the furnace, which not only increases the cooling air volume, improves pellet cooling, but also eliminates the dead charge column and caking in the furnace, increasing the output by 60%. However, in this structural design, the large water beam bends downwards, commonly known as "collapse of the waist", and the air guiding wall collapses. Therefore, the number, diameter, and wall thickness of the large water beam have been increased in the industry. However, when the temperature of the steel exceeds 350°C and is under a certain pressure, plastic deformation will occur, that is, creep phenomenon. The plastic deformation causes the middle of the large water beam of the air guiding wall to collapse, and the air guiding wall is damaged and collapses. Therefore, the service life of the air guiding wall is 1 - 1.5 years, which is also the service life of the shaft furnace. The existing shaft furnace structure seriously affects the service life of the shaft furnace, reduces the annual output of the shaft furnace and wastes maintenance funds, and is not environmentally friendly. Content of the Utility Model

[0004] In order to solve the problem that the existing shaft furnace structure seriously affects the service life of the shaft furnace, that is, it reduces the annual output of the shaft furnace and wastes maintenance funds, the utility model provides a structure for eliminating the collapse of the large water beam of a shaft furnace, and the technical solution is as follows:

[0005] A structure for eliminating the collapse of the large water beam of a shaft furnace includes an air guiding wall, a large water beam outer sleeve, a gearbox, and a lifting structure. The inside of the air guiding wall is hollow. The large water beam outer sleeve is arranged at the bottom of the air guiding wall. The number of gearboxes is two and they are respectively arranged on the left and right sides of the air guiding wall. Seamless large water beam pipes are arranged on the front and back inside the large water beam outer sleeve.

[0006] The lifting structure includes a lifting beam, lifting rings, connecting frames, and a lifting structure. The lifting beam is arranged between the opposite sides of the two gearboxes, penetrates and extends outside the air guiding wall. The number of lifting rings is several and they are arranged on the outer surface of the lifting beam. The connecting frames are arranged at the bottom of the lifting rings. The lifting structure is arranged at the bottom of the connecting frames.

[0007] The large water beam outer sleeve and the seamless large water beam pipes are set as arched shapes, which is beneficial to bearing the weight from the air guiding wall and resisting the collapse deformation.

[0008] Preferably, the lifting structure includes a connecting ring, a pull rod, and a tray. The connecting ring is sleeved on the outer surface of the connecting frame. The pull rod is arranged at the top of the outer surface of the connecting ring. A tray that abuts against the bottom of the outer sleeve of the large water beam is arranged at the bottom of the pull rod.

[0009] The pull rod and the tray in the lifting structure can lift the outer sleeve of the large water beam and the seamless steel pipe of the large water beam, eliminate the creep deformation of the metal at high temperature, extend the service life of the outer sleeve of the large water beam, the seamless steel pipe of the large water beam, and the air guide wall. Moreover, the seamless steel pipe of the large water beam is changed to direct-through forced water circulation cooling, which can effectively accelerate the cooling water to take away the heat of the pipe wall.

[0010] Preferably, the number of the lifting rings is several and they are evenly distributed. A clamping groove is formed at the bottom inside the lifting ring. The connecting frame is sleeved on the lifting ring through the clamping groove.

[0011] Preferably, the pull rod is sleeved on the connecting ring. The pull rod extends to the outside of the air guide wall and the outer sleeve of the large water beam. The tray fits against the bottom of the outer sleeve of the large water beam.

[0012] Preferably, the number of the seamless steel pipes of the large water beam is two groups. The number of the seamless steel pipes of each group is six and they are symmetrically distributed front and back. Each group of the seamless steel pipes of the large water beam is stacked up and down.

[0013] Preferably, a partition board is arranged inside the air guide wall. The number of the partition boards is one less than the number of the lifting rings. The partition boards are evenly distributed. The partition boards divide the inside of the air guide wall into multiple inner cavities.

[0014] Preferably, outlets are formed at the tops of the front and back of the air guide wall. The positions of the outlets correspond to the positions of the lifting rings. The inside of the air guide wall is communicated with the outside through the outlets.

[0015] Preferably, a cover plate is arranged at the top of the air guide wall. Handles are arranged on the fronts of the two gear boxes.

[0016] Preferably, furnaces are arranged on the left and right sides at the bottom of the outer sleeve of the large water beam. Scales are arranged at the tops of the left and right sides of the furnaces.

[0017] Preferably, pointers are arranged on the fronts of the left and right sides at the bottom of the outer sleeve of the large water beam. The positions of the pointers correspond to the positions of the scales.

[0018] The scales and the pointers can make the high-temperature creep of the air guide wall, the outer sleeve of the large water beam, and the seamless steel pipe of the large water beam visible, provide a basis for the adjustment of the hanging beam, solve the problem of the high-temperature creep and collapse of the air guide wall, the outer sleeve of the large water beam, and the seamless steel pipe of the large water beam in the shaft furnace, and fundamentally solve the bottleneck problem of the service life of the air guide wall of the pellet rectangular shaft furnace.

[0019] Beneficial effects:

[0020] The beneficial effects of adopting the technical solution of the present utility model are as follows:

[0021] 1. For the structure that eliminates the waist collapse of the large water beam in the shaft furnace, the outer jacket of the large water beam and the seamless steel pipe of the large water beam are set as an arch shape, which is beneficial to bearing the weight from the air guiding wall, resisting waist collapse deformation. The tie rods and trays in the lifting structure can lift the outer jacket of the large water beam and the seamless steel pipe of the large water beam, eliminate the creep deformation of the metal at high temperature, extend the service life of the outer jacket of the large water beam, the seamless steel pipe of the large water beam and the air guiding wall, and the seamless steel pipe of the large water beam is changed to direct-through forced water circulation cooling, which can effectively accelerate the cooling water to take away the heat of the pipe wall.

[0022] 2. For the structure that eliminates the waist collapse of the large water beam in the shaft furnace, the scale and the pointer can make the high-temperature creep of the air guiding wall, the outer jacket of the large water beam and the seamless steel pipe of the large water beam visible, provide a basis for the adjustment of the lifting beam, solve the problem of high-temperature creep and waist collapse of the air guiding wall, the outer jacket of the large water beam and the seamless steel pipe of the large water beam in the shaft furnace, and fundamentally solve the bottleneck problem of the service life of the air guiding wall of the rectangular shaft furnace for pelletizing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 is the overall three-dimensional structure schematic diagram of a structure for eliminating the waist collapse of the large water beam in the shaft furnace of the present utility model;

[0025] Figure 2 is the sectional structure schematic diagram of the air guiding wall and the outer jacket of the large water beam of a structure for eliminating the waist collapse of the large water beam in the shaft furnace of the present utility model;

[0026] Figure 3 is of a structure for eliminating the waist collapse of the large water beam in the shaft furnace of the present utility model Figure 2 enlarged structure schematic diagram at A in;

[0027] Figure 4 is the front view structure schematic diagram of a structure for eliminating the waist collapse of the large water beam in the shaft furnace of the present utility model.

[0028] In the figures, 1. air guiding wall; 2. outer jacket of large water beam; 3. gear box; 4. lifting beam; 5. lifting ring; 6. connecting frame; 7. connecting ring; 8. tie rod; 9. tray; 10. seamless steel pipe of large water beam; 11. partition board; 12. outlet; 13. cover plate; 14. handle; 15. furnace body; 16. scale; 17. pointer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0030] As Figure 1 and 4 shown, a structure for eliminating the waist collapse of the large water beam in a shaft furnace includes an air guiding wall 1, a large water beam outer sleeve 2, a gearbox 3, and a lifting structure. The inside of the air guiding wall 1 is hollowly arranged. The large water beam outer sleeve 2 is arranged at the bottom of the air guiding wall 1. The number of gearboxes 3 is two and they are respectively arranged on the left and right sides of the air guiding wall 1. Large water beam seamless steel pipes 10 are arranged on the front and back inside the large water beam outer sleeve 2.

[0031] In this embodiment, the number of large water beam seamless steel pipes 10 is two groups. The number of each group of large water beam seamless steel pipes 10 is six and they are symmetrically distributed front and back. Each group of large water beam seamless steel pipes 10 is stacked up and down. The large water beam seamless steel pipes 10 are changed to direct forced water circulation cooling, which can effectively accelerate the cooling water to take away the heat of the pipe wall.

[0032] As Figures 1-4 shown, the lifting structure includes a lifting beam 4, a lifting ring 5, a connecting frame 6, and a lifting structure. The lifting beam 4 is arranged between the opposite sides of the two gearboxes 3. The lifting beam 4 penetrates and extends outside the air guiding wall 1. The number of lifting rings 5 is several and they are arranged on the outer surface of the lifting beam 4. The connecting frame 6 is arranged at the bottom of the lifting ring 5. The lifting structure is arranged at the bottom of the connecting frame 6. The number of lifting rings 5 is several and they are equidistantly distributed. A clamping groove is opened at the bottom inside the lifting ring 5. The connecting frame 6 is sleeved on the lifting ring 5 through the clamping groove.

[0033] Specifically, the lifting structure includes a connecting ring 7, a pull rod 8, and a tray 9. The connecting ring 7 is sleeved on the outer surface of the connecting frame 6. The pull rod 8 is arranged at the top of the outer surface of the connecting ring 7. A tray 9 that abuts against the bottom of the large water beam outer sleeve 2 is arranged at the bottom of the pull rod 8. The pull rod 8 is sleeved on the connecting ring 7. The pull rod 8 extends outside the air guiding wall 1 and the large water beam outer sleeve 2. The tray 9 fits against the bottom of the large water beam outer sleeve 2.

[0034] In this embodiment, the tie rod 8 and the tray 9 in the lifting structure can lift the outer sleeve 2 of the large water beam and the seamless steel pipe 10 of the large water beam, eliminate the high-temperature creep deformation of the metal, and extend the service life of the outer sleeve 2 of the large water beam, the seamless steel pipe 10 of the large water beam, and the air guiding wall 1.

[0035] As Figure 1 and 4 shown, a partition 11 is provided inside the air guiding wall 1. The number of partitions 11 is one less than the number of lifting rings 5. The partitions 11 are evenly distributed. The partitions 11 divide the inside of the air guiding wall 1 into multiple inner cavities. Exits 12 are provided at the tops of the front and back of the air guiding wall 1. The positions of the exits 12 correspond to the positions of the lifting rings 5. The inside of the air guiding wall 1 communicates with the outside through the exits 12.

[0036] In this embodiment, the partition 11 enables the hot air to be discharged from the inner cavity exits 12 in sections, accelerating the discharge efficiency.

[0037] As Figure 1 and 4 shown, a cover plate 13 is provided at the top of the air guiding wall 1. Handles 14 are provided on the fronts of both gearboxes 3. Furnaces 15 are provided on the left and right sides at the bottom of the outer sleeve 2 of the large water beam. Scale rulers 16 are provided at the tops of the left and right sides of the furnaces 15. Pointers 17 are provided on the fronts of the left and right sides at the bottom of the outer sleeve 2 of the large water beam. The positions of the pointers 17 correspond to the positions of the scale rulers 16.

[0038] In this embodiment, when high-temperature creep occurs in the air guiding wall 1, the outer sleeve 2 of the large water beam, or the seamless steel pipe 10 of the large water beam, the position of the pointer 17 relative to the scale ruler 16 will change, thus pointing to different positions on the pointer 17. By observing the position of the pointer 17, it is possible to clearly and intuitively understand whether high-temperature creep has occurred in the outer sleeve 2 of the large water beam.

[0039] The utility model sets the outer sleeve 2 of the large water beam and the seamless steel pipe 10 of the large water beam in an arched shape, which is beneficial to bearing the weight of the air guiding wall and resisting the collapse deformation of the waist. The tie rod 8 and the tray 9 in the lifting structure can lift the outer sleeve 2 of the large water beam and the seamless steel pipe 10 of the large water beam, eliminate the high-temperature creep deformation of the metal, and extend the service life of the outer sleeve 2 of the large water beam, the seamless steel pipe 10 of the large water beam, and the air guiding wall 1. Moreover, the seamless steel pipe 10 of the large water beam is changed to direct-through forced water circulation cooling, which can effectively accelerate the cooling water to take away the heat of the pipe wall. The scale ruler 16 and the pointer 17 can visualize the high-temperature creep of the air guiding wall 1, the outer sleeve 2 of the large water beam, and the seamless steel pipe 10 of the large water beam, providing a basis for the adjustment of the lifting beam 4, solving the problem of high-temperature creep and waist collapse of the air guiding wall 1, the outer sleeve 2 of the large water beam, and the seamless steel pipe 10 of the large water beam in the vertical furnace, and fundamentally solving the bottleneck problem of the service life of the air guiding wall 1 in the pellet rectangular vertical furnace.

[0040] The usage method of the utility model is as follows:

[0041] When it is observed that the position of the pointer 17 is deflected, it indicates that the air guiding wall 1, the outer sleeve 2 of the large water beam or the seamless steel pipe 10 of the large water beam undergoes high-temperature creep. By rotating the handle 14 to drive the lifting ring 5, the connecting frame 6 and the connecting ring 7 to raise the height of the pull rod 8, and then raising the heights of the air guiding wall 1, the outer sleeve 2 of the large water beam and the seamless steel pipe 10 of the large water beam, so as to achieve the effect of avoiding the occurrence of waist collapse.

[0042] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0043] The above description is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A structure for eliminating the collapse of the large water beam in the shaft furnace, characterized in that, Including: An air guiding wall (1), a large water beam outer sleeve (2), a gearbox (3) and a lifting structure. The inside of the air guiding wall (1) is hollow. The large water beam outer sleeve (2) is arranged at the bottom of the air guiding wall (1). The number of the gearboxes (3) is two and they are respectively arranged on the left and right sides of the air guiding wall (1). Both the front and the back inside the large water beam outer sleeve (2) are provided with large water beam seamless steel pipes (10); The lifting structure includes a lifting beam (4), a lifting ring (5), a connecting frame (6) and a lifting structure. The lifting beam (4) is arranged between the opposite sides of the two gearboxes (3). The lifting beam (4) penetrates and extends to the outside of the air guiding wall (1). The number of the lifting rings (5) is several and they are arranged on the outer surface of the lifting beam (4). The connecting frame (6) is arranged at the bottom of the lifting ring (5). The lifting structure is arranged at the bottom of the connecting frame (6).

2. The structure for eliminating the collapse of the large water beam of the shaft furnace according to claim 1, characterized in that, The lifting structure includes a connecting ring (7), a pull rod (8) and a tray (9). The connecting ring (7) is sleeved on the outer surface of the connecting frame (6). The pull rod (8) is arranged at the top of the outer surface of the connecting ring (7). The bottom of the pull rod (8) is provided with a tray (9) that abuts against the bottom of the large water beam outer sleeve (2).

3. The structure for eliminating the collapse of the large water beam of the shaft furnace according to claim 1, characterized in that, The number of the lifting rings (5) is several and they are equidistantly distributed. A clamping groove is opened at the bottom inside the lifting ring (5). The connecting frame (6) is sleeved on the lifting ring (5) through the clamping groove.

4. A structure for eliminating the collapse of the large water beam of a shaft furnace according to claim 2, characterized in that, The pull rod (8) is sleeved on the connecting ring (7). The pull rod (8) extends to the outside of the air guiding wall (1) and the large water beam outer sleeve (2). The tray (9) fits against the bottom of the large water beam outer sleeve (2).

5. A structure for eliminating the collapse of the large water beam in the shaft furnace according to claim 1, characterized in that, The number of the large water beam seamless steel pipes (10) is two groups. The number of each group of the large water beam seamless steel pipes (10) is six and they are symmetrically distributed front and back. Each group of the large water beam seamless steel pipes (10) is distributed in a stacked manner up and down.

6. A structure for eliminating the collapse of the large water beam in the shaft furnace according to claim 1, characterized in that, A partition plate (11) is arranged inside the air guiding wall (1). The number of the partition plates (11) is one less than the number of the lifting rings (5). The partition plates (11) are equidistantly distributed. The partition plates (11) divide the inside of the air guiding wall (1) into multiple inner cavities.

7. A structure for eliminating the collapse of the large water beam in the shaft furnace according to claim 1, characterized in that, Exits (12) are opened at the top of both the front and the back of the air guiding wall (1). The positions of the exits (12) correspond to the positions of the lifting rings (5). The inside of the air guiding wall (1) communicates with the outside through the exits (12).

8. The structure for eliminating the collapse of the large water beam in the shaft furnace according to claim 1, characterized in that, A cover plate (13) is arranged at the top of the air guiding wall (1). Handles (14) are arranged on the front of both the two gearboxes (3).

9. The structure for eliminating the collapse of the large water beam in the shaft furnace according to claim 1, characterized in that, Furnaces (15) are arranged on both the left and right sides at the bottom of the large water beam outer sleeve (2). Scales (16) are arranged at the top of both the left and right sides of the furnaces (15).

10. A structure for eliminating the collapse of the large water beam in the shaft furnace according to claim 9, characterized in that, Pointers (17) are arranged on the front of both the left and right sides at the bottom of the large water beam outer sleeve (2). The positions of the pointers (17) correspond to the positions of the scales (16).

Images