Full-hydrogen bell type annealing furnace for ultrahigh-strength steel hot coil

Abstract

The invention discloses an ultrahigh-strength steel hot coil full-hydrogen bell-type annealing furnace, and relates to the technical field of annealing furnaces, the ultrahigh-strength steel hot coil full-hydrogen bell-type annealing furnace comprises a base, a furnace platform is arranged above the base, an equipment shell is arranged above the furnace platform, a high-speed burner heating assembly is arranged on one side of the equipment shell, an inner cover is arranged in the equipment shell, and an outer cover is arranged in the inner cover. A storage rack is arranged in the inner cover, a first purification box is arranged on one side of the furnace platform, a smoke outlet pipe is arranged between the first purification box and the equipment shell, a second purification box is arranged above the first purification box, and a filter screen, activated carbon and adsorption cotton are arranged in the second purification box. According to the all-hydrogen bell-type annealing furnace, the storage racks are arranged between the stacked steel hot coils, so that the steel hot coils can be prevented from being in direct contact, heat can flow quickly, the steel hot coils can be heated uniformly, adhesion of the steel hot coils is avoided, the annealing treatment quality of the steel hot coils is ensured, and the using effect of the bell-type annealing furnace is improved.

Description

Technical Field

[0001] The invention relates to the technical field of annealing furnaces, in particular to a full hydrogen bell-type annealing furnace for ultra-high strength steel hot coils. Background Art

[0002] As an advanced metal material, ultra-high-strength hot-rolled steel coils (HRCs) have demonstrated significant advantages in the automotive, engineering machinery, aerospace, and other fields. Their technological breakthroughs and market applications are driving related industries towards lightweighting and high safety. During production, HRCs require heat treatment, typically performed in a bell annealing furnace. Bell annealing furnaces are primarily used for annealing thin sheets and normalizing steel parts in a natural atmosphere. Full-hydrogen bell annealing furnaces are advanced intermittent annealing equipment that utilizes hydrogen as a protective atmosphere and high-speed circulating fans for intense convective heat transfer. They offer significant advantages in the steel and nonferrous metal processing industries.

[0003] The Chinese patent publication number is CN112813251A, and the authorization announcement date is May 18, 2021. A full-hydrogen hood annealing furnace includes a base. The full-hydrogen hood annealing furnace changes the structure of the fixed structure inside the bottom so that the wind force generated by the lower driving structure can all flow upward from the center of the bottom, and then diffuse to the surroundings after reaching the top, and then flow downward from the surroundings. In the process of downward flow, it is affected by the inner guide ring so that part of the gas can pass through, and part of the gas changes direction and flows horizontally to the bottom of the strip, and then flows obliquely upward from the bottom of the strip under the blocking action of the lower baffle ring, increasing the heat treatment effect on the bottom of the strip and the whole. At the same time, the middle air flow column will form a low-pressure area, which will naturally lead the gas in the high-pressure area with low flow rate on the outside to the middle, so that the heat at the bottom of the inner cover can be diffused from the middle upward and around, so as to better heat treat the strip.

[0004] The existing bell-type annealing furnace directly stacks the hot coils, which is not conducive to the rapid flow of heat and easily causes the hot coils to stick together. The annealing furnace has a poor flue gas purification effect and cannot purify the flue gas well. The exhausted flue gas will pollute the surrounding environment, reducing the use effect of the bell-type annealing furnace and failing to meet the use requirements. Summary of the Invention

[0005] The object of the present invention is to provide a full hydrogen bell annealing furnace for ultra-high strength steel hot coils, so as to solve the problem in the above background technology that the existing bell annealing furnace directly stacks the steel hot coils, which is not conducive to the rapid flow of heat and easily causes the steel hot coils to stick together. The annealing furnace has a poor flue gas purification effect and cannot purify the flue gas well. The discharged flue gas will pollute the surrounding environment, reduce the use effect of the bell annealing furnace, and cannot meet the use requirements.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a full hydrogen bell annealing furnace for hot-rolled ultra-high-strength steel, comprising a base, a furnace table is provided above the base, and the furnace table is fixedly connected to the base, a circulation fan assembly is provided at the center of the furnace table, and the circulation fan assembly is connected to the furnace table by screws, an equipment shell is provided above the furnace table, and the equipment shell is plugged into the furnace table, a high-speed burner heating assembly is provided on one side of the equipment shell, and the high-speed burner heating assembly is fixedly connected to the equipment shell, an inner cover is provided inside the equipment shell, and the inner cover and the equipment shell are provided as a whole, a storage rack is provided inside the inner cover, and the storage rack is provided Above the stove, a first purification box is provided on one side of the stove, a smoke outlet pipe is provided between the first purification box and the equipment shell, and both ends of the smoke outlet pipe are respectively connected to the inner cover and the first purification box as a whole, a solenoid valve is provided on the smoke outlet pipe, and the solenoid valve and the smoke outlet pipe are integrated, a second purification box is provided above the first purification box, and the second purification box is threadedly connected to the first purification box, a grille plate is provided at the upper end of the second purification box, and the grille plate is connected to the second purification box by screws, a filter screen, activated carbon and adsorption cotton are provided inside the second purification box, and the filter screen, activated carbon and adsorption cotton are arranged from bottom to top inside the second purification box.

[0007] Preferably, the storage rack includes an outer ring, an inner ring, a connecting strip and a raised block, the inner ring is arranged inside the outer ring, the connecting strip is arranged between the outer ring and the inner ring, six connecting strips are provided, and the two ends of the connecting strip are fixedly connected to the outer ring and the inner ring respectively, the six connecting strips are equidistantly arranged outside the inner ring, the raised blocks are arranged at the upper and lower ends of the outer ring, and the raised blocks are equidistantly arranged at the upper and lower ends of the outer ring.

[0008] Preferably, a column is provided on both sides of the furnace table, and the column is connected to the furnace table by screws, and a thread is provided on the outer wall of the upper part of the column, and a connecting plate is provided on both sides of the equipment shell, and the connecting plate is welded to the equipment shell, and an assembly hole is provided on the connecting plate, and the column and the assembly hole are correspondingly provided, the column and the connecting plate are slidably connected, a connecting cap is provided above the connecting plate, and the connecting cap is threadedly connected to the column, a high-temperature resistant sealing ring is provided at the edge of the upper end of the furnace table, and the high-temperature resistant sealing ring is fixedly connected to the furnace table, and the high-temperature resistant sealing ring is in contact with the equipment shell and the lower end of the inner cover.

[0009] Preferably, the cross-section of the lower end of the filter is arc-shaped, a visual window is provided on one side of the first purification box, and the visual window and the first purification box are integrated, a drain valve pipe is provided below the visual window, and the drain valve pipe is connected to the first purification box as a whole.

[0010] Preferably, a spray plate is provided on the top of the equipment housing, and the spray plate is fixedly connected to the equipment housing, the spray plate is arranged above the inner cover, a spray head is provided below the spray plate, and the spray head is connected to the spray plate, and a water inlet pipe is provided above the equipment housing, and the water inlet pipe is connected to the spray plate as a whole.

[0011] Preferably, a baffle ring is provided on the outside of the inner cover, at least four baffle rings are provided, and the baffle rings are fixedly connected to the inner cover, and water leakage holes are provided on the bottom of the baffle rings, and the water leakage holes are equidistantly arranged along the edge of the bottom of the baffle rings.

[0012] Preferably, a cooling fan is provided on both sides of the upper part of the device housing, and the cooling fan is connected to the device housing by screws.

[0013] Preferably, a lifting ring assembly is provided at the upper end of the equipment housing, four lifting ring assemblies are provided, and the lifting ring assembly is welded to the equipment housing, and the four lifting ring assemblies are equidistantly arranged at the upper end of the equipment housing.

[0014] Preferably, an anti-skid and shock-absorbing plate is provided at the lower end of the base, and the anti-skid and shock-absorbing plate is integrated with the base.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The device of the invention is provided with a storage rack, which is composed of an outer ring, an inner ring, a connecting strip, and a raised block. The outer ring, inner ring, and connecting strip form a hollow support plate, which can not only separate the stacked hot-rolled steel coils, but also leave a certain space between the stacked hot-rolled steel coils, which is conducive to the rapid flow of heat, so that the hot-rolled steel coils are heated evenly and avoid adhesion of the hot-rolled steel coils. The raised blocks form a limiting structure at the edge of the storage rack, which limits the position of the hot-rolled steel coils placed on the storage rack, effectively preventing the hot-rolled steel coils on the storage rack from falling, and improving the stacking effect of the hot-rolled steel coils.

[0017] 2. The device of the invention is provided with a first purification box, a second purification box, a smoke outlet pipe, a solenoid valve, a filter, activated carbon and adsorption cotton. An appropriate amount of absorption reagent is added to the first purification box, and the absorption reagent submerges the lower end of the smoke outlet pipe. The solenoid valve is opened to send the smoke into the first purification box along the smoke outlet pipe. The smoke contacts and reacts with the absorption reagent. The smoke after the reaction rises to the second purification box and passes through the filter, activated carbon and adsorption cotton in turn. The filter, activated carbon and adsorption cotton repeatedly filter and adsorb the smoke to remove toxic gases and particulate matter contained in the smoke. The purified smoke is then discharged from the grille plate, so that the discharged smoke meets the standards and will not pollute the external environment. The second purification box is threadedly connected to the first purification box, which is convenient for disassembling, cleaning and replacing the purification structure.

[0018] 3. The device of the invention is provided with a baffle ring and a water leakage hole. The sprayed water droplets fall on the baffle ring, thereby increasing the contact time between the water and the inner cover. The water dripping on the baffle ring flows down through the water leakage hole. The water can better fully contact the outer surface of the inner cover to absorb heat and evaporate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a cross-sectional view of the present invention;

[0021] Figure 3 For the present invention Figure 2 A partial enlarged view of area A;

[0022] Figure 4 This is a cross-sectional view of the connection between the second purification box and the first purification box of the present invention;

[0023] Figure 5 This is a structural diagram of the storage rack of the present invention;

[0024] Figure 6 It is a three-dimensional diagram of the baffle ring of the present invention.

[0025] In the figure: 1. Base; 2. Furnace table; 3. Equipment shell; 4. High-speed burner heating assembly; 5. Cooling fan; 6. Connecting plate; 7. Column; 8. Connecting cap; 9. Water inlet pipe; 10. Lifting ring assembly; 11. Anti-slip shock-absorbing plate; 12. First purification box; 13. Second purification box; 14. Smoke outlet pipe; 15. Grille plate; 16. Visual window; 17. Drain valve pipe; 18. High-temperature resistant sealing ring; 19. Circulation fan assembly; 20. Spray plate; 21. Spray head; 22. Inner cover; 23. Storage rack; 24. Baffle ring; 25. Assembly hole; 26. Solenoid valve; 27. Filter screen; 28. Activated carbon; 29. Adsorption cotton; 30. Outer ring; 31. Inner ring; 32. Connecting strip; 33. Raised block; 34. Leakage hole. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] See also Figure 1-6, an embodiment of the present invention provides: an ultra-high strength steel hot coil full hydrogen bell annealing furnace, comprising a base 1, a furnace table 2 is arranged above the base 1, and the furnace table 2 is fixedly connected to the base 1, a circulation fan assembly 19 is arranged at the center of the furnace table 2, and the circulation fan assembly 19 is connected to the furnace table 2 by screws, an equipment shell 3 is arranged above the furnace table 2, and the equipment shell 3 is plugged into the furnace table 2, a high-speed burner heating assembly 4 is arranged on one side of the equipment shell 3, and the high-speed burner heating assembly 4 is fixedly connected to the equipment shell 3, an inner cover 22 is arranged inside the equipment shell 3, and the inner cover 22 and the equipment shell 3 are integrated, a storage rack 23 is arranged inside the inner cover 22, and the storage rack 23 is arranged above the furnace table 2, a first purification box 12 is arranged on one side of the furnace table 2, a smoke outlet pipe 14 is arranged between the first purification box 12 and the equipment shell 3, and both ends of the smoke outlet pipe 14 are respectively connected to the inner cover 22 and the first purification box 12 as a whole, an electromagnetic valve 26 is arranged on the smoke outlet pipe 14, and the electromagnetic valve 26 is integrated with the smoke outlet pipe 14, a second purification box 13 is provided above the first purification box 12, and the second purification box 13 is threadedly connected to the first purification box 12, a grille plate 15 is provided on the upper end of the second purification box 13, and the grille plate 15 is connected to the second purification box 13 by screws, and a filter screen 27, activated carbon 28 and adsorption cotton 29 are provided inside the second purification box 13, and the filter screen 27, activated carbon 28 and adsorption cotton 29 are arranged from bottom to top inside the second purification box 13. The storage rack 23 includes an outer ring 30, an inner ring 31, a connecting bar 32 and a raised block 33. The inner ring 31 is arranged inside the outer ring 30, and the connecting bar 32 is arranged between the outer ring 30 and the inner ring 31. There are six connecting bars 32, and the two ends of the connecting bars 32 are fixedly connected to the outer ring 30 and the inner ring 31 respectively. The six connecting bars 32 are equidistantly arranged outside the inner ring 31, and the raised blocks 33 are arranged at the upper and lower ends of the outer ring 30, and the raised blocks 33 are equidistantly arranged at the upper and lower ends of the outer ring 30.

[0028] When in use: first place a rack 23 flat on the furnace table 2, lift the hot steel coil and place it on the rack 23, then place another rack 23 flat on top of the hot steel coil, and stack multiple hot steel coils on the furnace table 2 in the above manner. The stacked hot steel coils are not in direct contact, and a certain space is left between the stacked hot steel coils to facilitate rapid heat flow. The equipment shell 3 is lifted and lowered to cover the stacked hot steel coils, and the air between the inner cover 22 and the stacked hot steel coils is evacuated, and hydrogen is injected. The inner cover 22 is heated by the high-speed burner heating component 4, and the circulating fan component 19 generates a high-speed airflow, which is sent into the inner cover 22 to accelerate the flow of hydrogen. The flowing hydrogen absorbs the inner cover 22. The heat on the steel coil is transferred to the steel hot coil, which is heated for heat treatment. An appropriate amount of absorption reagent is added to the first purification box 12, and the absorption reagent submerges the lower end of the smoke outlet pipe 14. After the heat treatment is completed, the solenoid valve 26 is opened to send the flue gas into the first purification box 12 along the smoke outlet pipe 14. The flue gas contacts and reacts with the absorption reagent. The flue gas after the reaction rises and passes through the filter 27, activated carbon 28 and adsorption cotton 29 in turn. The filter 27, activated carbon 28 and adsorption cotton 29 repeatedly filter and adsorb the flue gas to remove the toxic gases and particulate matter contained in the flue gas. The purified flue gas is then discharged from the grille plate 15, so that the discharged flue gas meets the standards and will not pollute the external environment.

[0029] See also Figure 1 、 Figure 2 and Figure 3 , a column 7 is provided on both sides of the furnace table 2, and the column 7 is connected to the furnace table 2 by screws, and a thread is provided on the outer wall of the upper part of the column 7, a connecting plate 6 is provided on both sides of the equipment shell 3, and the connecting plate 6 is welded to the equipment shell 3, an assembly hole 25 is provided on the connecting plate 6, and the column 7 is correspondingly provided with the assembly hole 25, the column 7 is connected to the connecting plate 6 through sliding, a connecting cap 8 is provided above the connecting plate 6, and the connecting cap 8 is threadedly connected to the column 7, a high-temperature resistant sealing ring 18 is provided at the edge of the upper end of the furnace table 2, and the high-temperature resistant sealing ring 18 is connected to the furnace table 2 is fixedly connected, the high-temperature resistant sealing ring 18 contacts the lower end of the equipment housing 3 and the inner cover 22, the assembly hole 25 on the connecting plate 6 is aligned with the column 7, and the connecting plate 6 slides along the column 7 to guide and limit the lifting of the equipment housing 3, so that the equipment housing 3 can be lifted and lowered smoothly, and the equipment housing 3 can be better connected to the furnace table 2. The connecting cap 8 is connected to the column 7 to limit the set connecting plate 6, thereby improving the firmness of the connection between the equipment housing 3 and the furnace table 2. The high-temperature resistant sealing ring 18 fills the connection gap between the equipment housing 3 and the furnace table 2, thereby improving the sealing performance of the connection between the equipment housing 3 and the furnace table 2.

[0030] See also Figure 1 and Figure 4The cross-section of the lower end of the filter screen 27 is arc-shaped. A visual window 16 is provided on one side of the first purification box 12, and the visual window 16 and the first purification box 12 are integrated. A drain valve pipe 17 is provided below the visual window 16, and the drain valve pipe 17 is connected to the first purification box 12 as a whole. The visual window 16 can observe the situation in the first purification box 12 from the outside, which is convenient for timely addition of absorption reagent, or cleaning of the reaction products of flue gas and absorption reagent, ensuring the reaction efficiency of the injected flue gas and absorption reagent, and opening the drain valve pipe 17 to discharge the liquid in the first purification box 12.

[0031] See also Figure 1 、 Figure 2 and Figure 6 , a spray disc 20 is provided on the top of the equipment housing 3, and the spray disc 20 is fixedly connected to the equipment housing 3, the spray disc 20 is provided above the inner cover 22, a spray head 21 is provided below the spray disc 20, and the spray head 21 is connected to the spray disc 20, a water inlet pipe 9 is provided above the equipment housing 3, and the water inlet pipe 9 is connected to the spray disc 20 as a whole, a baffle ring 24 is provided on the outside of the inner cover 22, at least four baffle rings 24 are provided, and the baffle ring 24 is fixedly connected to the inner cover 22, and a water leakage hole 34 is provided at the bottom of the baffle ring 24, and the water leakage hole 34 is arranged along the bottom of the baffle ring 24. The edges of the upper part are arranged equidistantly, and a cooling fan 5 is provided on both sides of the upper part of the equipment shell 3, and the cooling fan 5 is connected to the equipment shell 3 by screws. After the heat treatment is completed, cold water is injected into the spray plate 20 from the water inlet pipe 9, and the water is evenly sprayed to the inner cover 22 through the spray head 21. The water contacts the inner cover 22, absorbs the heat on the inner cover 22, and accelerates the cooling. The cooling fan 5 is turned on to discharge the high-temperature steam between the equipment shell 3 and the inner cover 22, and the sprayed water droplets fall on the flow control ring 24, which increases the contact time between the water and the inner cover 22, and the water can better contact the outer surface of the inner cover 22 to absorb heat and evaporate.

[0032] See also Figure 1 A lifting ring assembly 10 is provided at the upper end of the equipment housing 3. There are four lifting ring assemblies 10, and the lifting ring assemblies 10 are welded to the equipment housing 3. The four lifting ring assemblies 10 are equidistantly arranged at the upper end of the equipment housing 3. A non-slip shock-absorbing plate 11 is provided at the lower end of the base 1, and the non-slip shock-absorbing plate 11 is integrated with the base 1. With the help of the lifting ring assembly 10, the equipment housing 3 is conveniently lifted as a whole to realize the opening and closing of the annealing furnace. The non-slip shock-absorbing plate 11 increases the contact friction between the annealing furnace and the ground, and can also play a shock-absorbing role, thereby improving the stability of the annealing furnace.

[0033] Working principle: first place a rack 23 flat on the furnace table 2, lift the hot steel coil and place it on the rack 23, then place another rack 23 flat on top of the hot steel coil, and stack multiple hot steel coils on the furnace table 2 in the above manner. The stacked hot steel coils are not in direct contact, and a certain space is left between the stacked hot steel coils. The equipment shell 3 is lifted and lowered to connect with the furnace table 2; the air between the inner cover 22 and the space between the stacked hot steel coils is evacuated, and hydrogen is injected. The high-speed burner heating component 4 heats the inner cover 22, and the circulating fan component 19 generates a high-speed airflow. The airflow is sent into the inner cover 22 to accelerate the flow of hydrogen. The flowing hydrogen absorbs the heat on the inner cover 22 and transfers it to the hot steel coil, heating the hot steel coil for heat treatment; during cooling, water is injected into the spray plate 20 from the water inlet pipe 9, and the water is evenly distributed through the spray head 21 The water is sprayed onto the inner cover 22, and contacts the inner cover 22 to absorb the heat on the inner cover 22, accelerating the cooling. The cooling fan 5 is turned on to discharge the high-temperature steam between the equipment shell 3 and the inner cover 22; an appropriate amount of absorption reagent is added to the first purification box 12, and the absorption reagent submerges the lower end of the smoke outlet pipe 14. After the heat treatment is completed, the solenoid valve 26 is opened to send the flue gas into the first purification box 12 along the smoke outlet pipe 14. The flue gas contacts the absorption reagent to react, and the flue gas after the reaction rises and passes through the filter 27, activated carbon 28 and adsorption cotton 29 in turn. The filter 27, activated carbon 28 and adsorption cotton 29 repeatedly filter and adsorb the flue gas to remove the toxic gases and particulate matter contained in the flue gas. The purified flue gas is then discharged from the grille plate 15, so that the discharged flue gas meets the standards and will not pollute the external environment.

[0034] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A full hydrogen bell annealing furnace for hot-rolled ultra-high strength steel, comprising a base (1), characterized in that: A furnace platform (2) is provided above the base (1), and the furnace platform (2) is fixedly connected to the base (1); a circulation fan assembly (19) is provided at the center of the furnace platform (2), and the circulation fan assembly (19) is connected to the furnace platform (2) by screws; an equipment shell (3) is provided above the furnace platform (2), and the equipment shell (3) is plugged into the furnace platform (2); a high-speed burner heating assembly (4) is provided on one side of the equipment shell (3), and the high-speed burner heating assembly (4) is fixedly connected to the equipment shell (3); an inner cover (22) is provided inside the equipment shell (3), and the inner cover (22) and the equipment shell (3) are provided as a whole; a storage rack (23) is provided inside the inner cover (22), and the storage rack (23) is provided above the furnace platform (2); a first purification box (12) is provided on one side of the furnace platform (2), and the first purification box A smoke outlet pipe (14) is provided between the first purification box (12) and the equipment housing (3), and both ends of the smoke outlet pipe (14) are connected to the inner cover (22) and the first purification box (12) as a whole. A solenoid valve (26) is provided on the smoke outlet pipe (14), and the solenoid valve (26) and the smoke outlet pipe (14) are set as a whole. A second purification box (13) is provided above the first purification box (12), and the second purification box (13) is threadedly connected to the first purification box (12). A grille plate (15) is provided at the upper end of the second purification box (13), and the grille plate (15) is connected to the second purification box (13) by screws. A filter screen (27), activated carbon (28) and adsorption cotton (29) are provided inside the second purification box (13), and the filter screen (27), activated carbon (28) and adsorption cotton (29) are arranged from bottom to top inside the second purification box (13).

2. The full hydrogen bell annealing furnace for hot-rolled ultra-high strength steel according to claim 1, characterized in that: The storage rack (23) includes an outer ring (30), an inner ring (31), a connecting bar (32) and a protruding block (33), wherein the inner ring (31) is arranged inside the outer ring (30), and the connecting bar (32) is arranged between the outer ring (30) and the inner ring (31), six connecting bars (32) are provided, and the two ends of the connecting bar (32) are fixedly connected to the outer ring (30) and the inner ring (31), respectively, and the six connecting bars (32) are equidistantly arranged outside the inner ring (31), and the protruding blocks (33) are arranged at the upper end and the lower end of the outer ring (30), and the protruding blocks (33) are equidistantly arranged at the upper end and the lower end of the outer ring (30).

3. The full hydrogen bell annealing furnace for hot-rolled ultra-high strength steel according to claim 1, characterized in that: A column (7) is provided on both sides of the furnace table (2), and the column (7) is connected to the furnace table (2) by screws. The outer wall of the upper part of the column (7) is provided with a thread. A connecting plate (6) is provided on both sides of the equipment shell (3), and the connecting plate (6) is welded to the equipment shell (3). The connecting plate (6) is provided with an assembly hole (25), and the column (7) and the assembly hole (25) are correspondingly arranged. The column (7) and the connecting plate (6) are connected in a sliding manner. A connecting cap (8) is provided above the connecting plate (6), and the connecting cap (8) is threadedly connected to the column (7). A high-temperature resistant sealing ring (18) is provided at the edge of the upper end of the furnace table (2), and the high-temperature resistant sealing ring (18) is fixedly connected to the furnace table (2). The high-temperature resistant sealing ring (18) contacts the lower end of the equipment shell (3) and the inner cover (22).

4. The full hydrogen bell annealing furnace for hot-rolled ultra-high strength steel according to claim 1, characterized in that: The cross-section of the lower end of the filter screen (27) is arranged in an arc shape, a visual window (16) is arranged on one side of the first purification box (12), and the visual window (16) and the first purification box (12) are arranged as a whole, and a drain valve pipe (17) is arranged below the visual window (16), and the drain valve pipe (17) and the first purification box (12) are connected as a whole.

5. The full hydrogen bell annealing furnace for hot coiled ultra-high strength steel according to claim 1, characterized in that: A spray pan (20) is provided on the top of the equipment housing (3), and the spray pan (20) is fixedly connected to the equipment housing (3); the spray pan (20) is provided above the inner cover (22); a spray head (21) is provided below the spray pan (20), and the spray head (21) is connected to the spray pan (20); a water inlet pipe (9) is provided above the equipment housing (3), and the water inlet pipe (9) is connected to the spray pan (20) as a whole.

6. The full hydrogen bell annealing furnace for hot coiled ultra-high strength steel according to claim 1, characterized in that: A flow blocking ring (24) is provided on the outside of the inner cover (22), at least four flow blocking rings (24) are provided, and the flow blocking rings (24) are fixedly connected to the inner cover (22), and water leakage holes (34) are provided at the bottom of the flow blocking ring (24), and the water leakage holes (34) are equidistantly arranged along the edge of the bottom of the flow blocking ring (24).

7. The full hydrogen bell annealing furnace for hot coiled ultra-high strength steel according to claim 1, characterized in that: A cooling fan (5) is provided on both sides of the upper portion of the device housing (3), and the cooling fan (5) is connected to the device housing (3) via screws.

8. The full hydrogen bell annealing furnace for hot coiled ultra-high strength steel according to claim 1, characterized in that: A lifting ring assembly (10) is provided at the upper end of the equipment housing (3), four lifting ring assemblies (10) are provided, and the lifting ring assembly (10) is welded to the equipment housing (3), and the four lifting ring assemblies (10) are equidistantly arranged at the upper end of the equipment housing (3).

9. The full hydrogen bell annealing furnace for hot coiled ultra-high strength steel according to claim 1, characterized in that: The lower end of the base (1) is provided with an anti-skid shock-absorbing plate (11), and the anti-skid shock-absorbing plate (11) and the base (1) are provided as a whole.

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