Large cylinder heat treatment system

Abstract

The utility model relates to the technical field of industrial heat treatment, in particular to a large barrel heat treatment system which comprises a burner installed at an opening in the side of a hot blast stove and used for jetting flames, a three-way guide pipe is detachably placed in the hot blast stove and comprises a transverse pipe and a vertical pipe arranged at the end of the transverse pipe, the vertical pipe is vertically arranged in the middle of the hot blast stove. The combustor jets flames, the flames are jetted upwards and downwards through the vertical pipes after being guided by the three-way guide pipe, the upper flames are main flames, the lower flames are auxiliary flames, and therefore the problem that the bottom center cannot be normally heated is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of industrial heat treatment technology, and particularly relates to a large cylinder heat treatment system. BACKGROUND

[0002] After the hot blast furnace body is replaced, partial furnace bodies need to be subjected to postweld heat treatment according to design requirements. At present, the main body of the hot blast furnace is usually subjected to integral heat treatment by using internal oil combustion, the furnace cavity is used as the hearth, the outer side of the hot blast furnace is subjected to heat insulation by using heat preservation materials, a light diesel oil full-automatic burner is installed by using a side manhole, smoke is discharged by using a top manhole, and high-temperature flue gas generated by the burner is subjected to convection conduction and radiation in the furnace, so that the hot blast furnace is heated to a temperature required for heat treatment and maintained for a certain time, and then the fire is stopped and the temperature is reduced.

[0003] However, the burner can only be installed on the outer wall of the hot blast furnace due to the limitation of its own structure, the direction of the flame sprayed by the burner is only horizontal, and the effective heating area is only in the top area, so that normal and uniform heating cannot be realized for the bottom center area, and the heat treatment effect is not ideal. SUMMARY

[0004] In order to realize the purpose of effective heat treatment of the hot blast furnace in all directions, the utility model provides a large cylinder heat treatment system.

[0005] The large cylinder heat treatment system provided by the utility model adopts the following technical scheme:

[0006] The large cylinder heat treatment system comprises a burner installed at a side opening of a hot blast furnace and used for spraying flame, and a three-way guide pipe which is detachably placed in the hot blast furnace and comprises a horizontal pipe and a vertical pipe arranged at the end of the horizontal pipe, the horizontal pipe is communicated with the burner, and the vertical pipe is vertically arranged in the middle of the hot blast furnace.

[0007] By adopting the above technical scheme, the burner sprays flame, the flame is guided by the three-way guide pipe and then sprayed upward and downward by the vertical pipe, the upper flame is the main flame, and the lower flame is the auxiliary flame, so that the problem that the bottom center cannot be normally heated is solved.

[0008] Optionally, a fireproof cap formed by stacking multiple layers of steel wire meshes is installed at the top opening of the hot blast furnace.

[0009] By adopting the above technical scheme, the fireproof cap made of steel wire meshes has the effects of air permeability, fire resistance and prevention of spillover of sparks.

[0010] Optionally, a thermocouple and a fixing device are arranged outside the hot blast stove, the fixing device comprises two connecting nuts fixed to the outer wall of the hot blast stove, a mounting nut is fixed between the two connecting nuts, a gap for accommodating the thermocouple is arranged between the mounting nut and the outer wall of the hot blast stove, and a push screw for abutting and fixing the thermocouple is threadedly mounted on the mounting nut.

[0011] By adopting the above technical scheme, the fixing device is simple to operate, and the thermocouple can be effectively fixed on the wall of the hot blast stove.

[0012] Optionally, the burner is a fuel oil combustion type, and the burner is connected to an oil tank through an oil supply pipe and an oil return pipe.

[0013] By adopting the above technical scheme, the fuel oil conveying and combustion system stably outputs, and continuous operation is facilitated.

[0014] Optionally, the horizontal pipe and the vertical pipe are vertically welded and fixed, and the tee guide pipe body is installed in the hot blast stove.

[0015] By adopting the above technical scheme, the tee guide pipe body is convenient to install or disassemble.

[0016] Optionally, the horizontal pipe and the vertical pipe are separately arranged, shafts are fixed to the two sides of the vertical pipe, support plates are fixed to the ends of the horizontal pipe in the same direction, the shafts are rotatably connected to the support plates, an extension pipe is coaxially arranged in the horizontal pipe, a joint pipe is vertically fixed to the side wall of the vertical pipe and communicates with the inside of the vertical pipe, the extension pipe and the joint pipe are detachably inserted, and a driving mechanism for driving the vertical pipe to rotate along the shaft and the extension pipe to move back and forth is arranged in the horizontal pipe.

[0017] By adopting the above technical scheme, the vertical pipe and the horizontal pipe are kept coaxial before installation, the vertical pipe is adjusted to be vertical after installation, and the extension pipe and the joint pipe are inserted, so that the tee guide pipe can be applied to an effective working environment of installation space, thereby improving the adaptation range of the structure.

[0018] Optionally, the driving mechanism comprises a driving rack and a driving slide rod, a driven gear is sleeved and mounted on the shaft close to the driving rack, the driving rack is slidably connected to the inner side of the horizontal pipe and meshes with the driven gear, the driving slide rod is slidably connected to the inner side of the horizontal pipe and is fixed to the extension pipe, two slide holes are formed in the horizontal pipe along the length direction, a handle one is vertically fixed to the driving rack and penetrates one of the slide holes, and a handle two is vertically fixed to the driving slide rod and penetrates the other slide hole.

[0019] By adopting the above technical scheme, the staff can complete the whole operation by simply operating the handle one and the handle two, the operation process is simple and efficient, and the working efficiency can be effectively improved.

[0020] Optionally, a plurality of limiting sleeve pipes for limiting the moving direction are fixed to the inner wall of the horizontal pipe, and the driving rack and the driving slide rod are respectively slidably arranged in the corresponding limiting sleeve pipes.

[0021] By adopting the technical scheme, the limiting sleeve limits the moving direction of the driving rack and the driving slide rod, so that the stability of the moving process of the two is maintained.

[0022] Optionally, the distal end of the extension pipe away from the vertical pipe is outwardly folded to form a diameter expanding edge, the diameter expanding edge is in sliding sealing with the inner wall of the horizontal pipe, and the diameter expanding edge is provided with a slot for the driving rack and the driving slide rod to pass through.

[0023] By adopting the technical scheme, the diameter expanding edge is arranged to improve the sealing between the extension pipe and the horizontal pipe.

[0024] In summary, the utility model has at least one of the following beneficial technical effects:

[0025] 1. The burner sprays flames, the flames are guided by the three-way guide pipe, and then are sprayed upward and downward by the vertical pipe, the upper flames are main flames, and the lower flames are auxiliary flames, so that the problem that the bottom center cannot be normally heated is solved;

[0026] 2. The fireproof cap made of steel wire mesh has the effects of air permeability, fire resistance and prevention of overflow of sparks;

[0027] 3. The fixing device is simple to operate, and can effectively fix the thermocouple on the hot blast furnace wall. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic view of the large-scale cylinder heat treatment system of the embodiment 1 of the utility model.

[0029] Figure 2 is a structural schematic view of the thermocouple and the fixing device of the embodiment 1 of the utility model.

[0030] Figure 3 is a front view of the three-way guide pipe before installation of the embodiment 2 of the utility model.

[0031] Figure 4 is Figure 3 a sectional view in A-A direction.

[0032] Figure 5 is a front view of the three-way guide pipe after installation of the embodiment 2 of the utility model (the support plate part is processed as a sectional view).

[0033] Figure 6 is a schematic view of the extension pipe and the joint pipe insertion process of the embodiment 2 of the utility model.

[0034] Explanation of reference signs: 1, hot blast furnace; 2, oil tank; 20, oil supply pipe; 21, oil return pipe; 3, burner; 4, three-way guide pipe; 40, cross pipe; 400, sliding hole; 41, vertical pipe; 410, joint pipe; 42, rotating shaft; 43, support plate; 44, driving rack; 440, handle I; 45, driven gear; 46, extension pipe; 460, diameter expansion section; 4600, accommodation groove; 47, driving sliding rod; 470, handle II; 48, limiting sleeve; 5, fireproof cap; 6, heat insulation layer; 7, thermocouple; 8, fixing device; 80, connecting nut; 81, mounting nut; 82, push screw. DETAILED DESCRIPTION

[0035] The drawings will be described below Figure 1 - the drawings Figure 6 The utility model is further described in detail.

[0036] The utility model discloses a large -scale cylinder heat treatment system. Embodiment 1

[0037] Referring to Figure 1 and Figure 2 , the large -scale cylinder heat treatment system acts on hot blast furnace 1, and the system includes oil tank 2, burner 3, three-way guide pipe 4, fireproof cap 5, heat insulation layer 6, thermocouple 7 and fixing device 8. Among them, burner 3 and three-way guide pipe 4 are installed to the side manhole of hot blast furnace 1 through flange, and the flange and burner 3 are sealed with aluminium silicate blanket heat insulation between them;Burner 3 is located outside hot blast furnace 1, and three-way guide pipe 4 is located inside hot blast furnace 1, and the two are communicated to constitute the guide path of flame injection.

[0038] Referring to Figure 1 , three-way guide pipe 4 includes cross pipe 40 and vertical pipe 41 vertically welded to the end of cross pipe 40, and vertical pipe 41 is located in the middle of hot blast furnace 1, and the flame generated by burner 3 converts horizontal flame into vertical flame after passing through cross pipe 40 and vertical pipe 41 in turn, and the main flame is ejected from the upper part and is used for heating the inside of the furnace body, and the auxiliary flame is ejected from the lower part, realizing the hot treatment of the bottom flame. The chimney is additionally installed at the flange of the top manhole of hot blast furnace 1, and the fireproof cap 5 is covered and installed on the top of the chimney, which adopts a plurality of high-density steel wire meshes stacked to prevent sporadic sparks from emerging from the chimney, and does not affect normal smoke exhaust.

[0039] Referring to Figure 1 , the rest of the openings of hot blast furnace 1 are closed by iron plate and asbestos to prevent smoke exhaust and heat loss. The heat insulation layer 6 surrounds the outside of the hot blast furnace 1 to ensure that the outer temperature is not higher than 60 DEG C when heating, and in the embodiment, the aluminium silicate needle punching blanket with good heat insulation, low thermal conductivity and low bulk density is used, and the inner back type heat insulation nail is fixed.

[0040] With reference to Figure 2 The hot air furnace 1 is provided with a plurality of thermocouples 7 arranged around the circumference of the hot air furnace 1 and abutting against the outer wall of the hot air furnace 1. The fixing device 8 is used for fixing the thermocouples 7, and the fixing device 8 comprises two connecting nuts 80 welded to the outer wall of the hot air furnace 1, and a mounting nut 81 welded between the two connecting nuts 80, and the mounting nut 81 forms a gap for accommodating the thermocouples 7 between the mounting nut 81 and the furnace wall of the hot air furnace 1, and a push screw 82 is threadedly mounted on the mounting nut 81 and used for tightly fixing the thermocouples 7.

[0041] The implementation principle of the embodiment 1 is that the burner 3 sprays the flame, and the flame is sprayed upward and downward by the vertical pipes 41 after being guided by the three-way guide pipe 4, the upper flame is the main flame, and the lower flame is the auxiliary flame, so that the problem that the bottom center cannot be normally heated is solved. The fire cap 5 made of steel wire mesh has the effects of air permeability, fire resistance and prevention of overflow of sparks. The fixing device 8 is simple to operate and can effectively fix the thermocouples 7 on the furnace wall of the hot air furnace 1. Embodiment 2

[0042] With reference to Figure 3 and Figure 4 In order to facilitate the installation or dismounting of the three-way guide pipe 4, the embodiment is different from the embodiment 1 in that the horizontal pipe 40 and the vertical pipe 41 are separately arranged. The vertical pipe 41 is vertically and fixedly connected with a rotating shaft 42 at the middle of the outer wall on both sides, the horizontal pipe 40 is fixedly connected with a support plate 43 at the end of both sides, the length direction of the support plate 43 is the same as the length direction of the horizontal pipe 40, and the rotating shaft 42 is rotatably connected with the end of the support plate 43 away from the horizontal pipe 40.

[0043] With reference to Figure 4 and Figure 5 One side of the inside of the horizontal pipe 40 is provided with a driving rack 44 along the length direction of the horizontal pipe 40, and the driving rack 44 is located inside the support plate 43. A slide hole 400 is formed on the side wall of the horizontal pipe 40, the width of the slide hole 400 is smaller than the width of the driving rack 44, the length direction of the slide hole 400 is the same as the length direction of the driving rack 44, a handle 1 440 is vertically and fixedly connected with the driving rack 44, the handle 1 440 is slidably arranged in the slide hole 400, and the handle 1 440 can drive the driving rack 44 to move back and forth.

[0044] With reference to Figure 4 and Figure 5, the driving rack 44 is sleeved and mounted on the rotating shaft 42 of the driving gear 45, the driving gear 45 is engaged with the driving rack 44, the driving rack 44 moves and drives the driving gear 45 to rotate, the driving gear 45 rotates and drives the vertical pipe 41 to rotate, and the vertical pipe 41 is adjusted from the horizontal state to the vertical state. The extension pipe 46 is coaxially arranged in the horizontal pipe 40, the outer diameter of the extension pipe 46 is smaller than the inner diameter of the horizontal pipe 40, and the extension pipe 46 is located at the end of the horizontal pipe 40 close to the vertical pipe 41.

[0045] Referring to Figure 4 , the other side of the horizontal pipe 40 is provided with a driving slide rod 47 along the length direction of the horizontal pipe 40, one end of the driving slide rod 47 is fixedly connected with the extension pipe 46, and the driving slide rod 47 is used for driving the extension pipe 46 to move axially. A slide hole 400 is formed in the side wall of the horizontal pipe 40, the width of the slide hole 400 is smaller than the width of the driving slide rod 47, the length direction of the slide hole 400 is the same as the length direction of the driving slide rod 47, a handle 470 is vertically fixedly connected with the driving slide rod 47, the handle 470 slides through the slide hole 400, and the extension pipe 46 can be driven to move back and forth through the handle 470.

[0046] Referring to Figures 4-6 , the vertical pipe 41 is provided with a joint pipe 410 at the middle portion, the joint pipe 410 is communicated with the vertical pipe 41, the extension pipe 46 is detachably sleeved on the joint pipe 410, so that the vertical pipe 41 can be kept in the stable vertical state; one end of the extension pipe 46 away from the vertical pipe 41 is outwardly folded to form a diameter expansion edge 460, the diameter expansion edge 460 is in sliding sealing with the inner wall of the horizontal pipe 40, and the diameter expansion edge 460 is provided with a position giving slot 4600 corresponding to the positions of the driving rack 44 and the driving slide rod 47. A plurality of limiting sleeve pipes 48 are fixedly connected to the inner wall of the horizontal pipe 40, the driving rack 44 and the driving slide rod 47 slide through the corresponding limiting sleeve pipes 48, so that the moving directions of the driving rack 44 and the driving slide rod 47 are limited, and the stability of the moving process is ensured.

[0047] The implementation principle of the embodiment 2 is that the installation process of the three-way guide pipe 4 is divided into two steps: in the first step, the coaxially arranged horizontal pipe 40 and vertical pipe 41 are inserted into the hot blast stove 1 together, and the horizontal pipe 40 is flange-fixed, at this time, the handle 440 and the handle 470 are located outside the hot blast stove 1 for facilitating the operation of the staff. Then, the handle 440 is pushed towards the hot blast stove 1, the handle 440 drives the driving rack 44 to move, the driving rack 44 drives the driving gear 45 to rotate, and the driving gear 45 drives the vertical pipe 41 to rotate by 90° to the vertical state.

[0048] Second, the handle two 470 is pushed to the direction of the hot blast stove 1, the handle two 470 moves and drives the extension pipe 46 to move, until the extension pipe 46 is set on the joint pipe 410, at this time, the horizontal pipe 40 is communicated with the inside of the vertical pipe 41 through the extension pipe 46, and the extension pipe 46 is inserted and matched with the joint pipe 410, the rotation of the vertical pipe 41 is limited, so that it keeps the stable vertical state.

[0049] The process can disassemble the tee guide pipe 4. The tee guide pipe 4 can reduce the space occupation in the installation or disassembly stage, so that it is more convenient to access the manhole, thereby improving the convenience of installation or disassembly, and expanding the application range of the tee guide pipe 4 to different models of furnace bodies and manholes. One end of the extension pipe 46 is detachably sleeved with the joint pipe 410, and the other end is provided with a diameter expansion side 460 and is slidably sealed with the horizontal pipe 40, thereby improving the overall sealing performance of the tee guide pipe 4.

[0050] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A large shell heat treatment system characterized by: The burner (3) is installed at the side opening of the hot blast stove (1) for spraying flame, and a three-way guide pipe (4) is detachably placed in the hot blast stove (1), the three-way guide pipe (4) comprises a horizontal pipe (40) and a vertical pipe (41) arranged at the end of the horizontal pipe (40), the horizontal pipe (40) is communicated with the burner (3), and the vertical pipe (41) is vertically arranged in the middle of the hot blast stove (1).

2. The large shell heat treatment system of claim 1, wherein: A fireproof cap (5) formed by stacking multiple steel wire meshes is installed at the top opening of the hot blast stove (1).

3. The large shell heat treatment system of claim 1, wherein: A thermocouple (7) and a fixing device (8) are arranged outside the hot blast stove (1), the fixing device (8) comprises two connecting nuts (80) fixed to the outer wall of the hot blast stove (1), a mounting nut (81) is fixed between the two connecting nuts (80), a gap for accommodating the thermocouple (7) is arranged between the mounting nut (81) and the outer wall of the hot blast stove (1), and a push rod (82) for tightly fixing the thermocouple (7) is threadedly mounted on the mounting nut (81).

4. The large shell heat treatment system of claim 1, wherein: The burner (3) is of oil combustion type, and the burner (3) is connected with an oil tank (2) through an oil supply pipe (20) and an oil return pipe (21).

5. The large shell heat treatment system of any one of claims 1-4, wherein: The horizontal pipe (40) and the vertical pipe (41) are fixed by vertical welding, and the main body of the three-way guide pipe (4) is installed in the hot blast stove (1).

6. The large shell heat treatment system of any one of claims 1-4, wherein: The horizontal pipe (40) and the vertical pipe (41) are arranged in a split mode, shafts (42) are fixed on both sides of the vertical pipe (41), support plates (43) are fixed on the ends of the horizontal pipe (40) in the same direction, the shafts (42) are rotatably connected to the support plates (43), an extension pipe (46) is coaxially arranged in the horizontal pipe (40), a joint pipe (410) communicated with the inside of the vertical pipe (41) is fixed on the side wall of the vertical pipe (41) in a vertical mode, the extension pipe (46) is detachably inserted into the joint pipe (410), and a driving mechanism for driving the vertical pipe (41) to rotate along the shaft and the extension pipe (46) to move back and forth is arranged in the horizontal pipe (40).

7. The large shell heat treatment system of claim 6, wherein: The driving mechanism comprises a driving rack (44) and a driving slide rod (47), a driven gear (45) is sleeved and mounted on the shaft (42) close to the driving rack (44), the driving rack (44) is slidably connected to the inside of the horizontal pipe (40) and is engaged with the driven gear (45), the driving slide rod (47) is slidably connected to the inside of the horizontal pipe (40) and is fixed with the extension pipe (46), two slide holes (400) are formed in the horizontal pipe (40) along the length direction, a handle one (440) is fixed on the driving rack (44) in a vertical mode and passes through one of the slide holes (400), and a handle two (470) is fixed on the driving slide rod (47) in a vertical mode and passes through the other slide hole (400).

8. The large shell heat treatment system of claim 7, wherein: A plurality of limiting sleeve pipes (48) for limiting the moving direction are fixed on the inner wall of the horizontal pipe (40), and the driving rack (44) and the driving slide rod (47) are slidably arranged in the corresponding limiting sleeve pipes (48).

9. The large shell heat treatment system of claim 7, wherein: An expanding edge (460) is formed by outwardly folding the end of the extension pipe (46) away from the vertical pipe (41), the expanding edge (460) is in sliding sealing with the inner wall of the horizontal pipe (40), and a gap slot (4600) is formed in the expanding edge (460) for the driving rack (44) and the driving slide rod (47) to pass through.

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