Furnace door suitable for temperature zone control of annular furnace and annular furnace

Abstract

The invention discloses a furnace door suitable for temperature zoning control of an annular furnace and the annular furnace, belongs to the technical field of heat treatment equipment, and aims to solve the problem that a furnace door in an existing annular furnace cannot separate two adjacent sections.The furnace door suitable for temperature zoning control of the annular furnace comprises a door body (1) and a driving mechanism (5) which are sequentially connected. The driving mechanism (5) can drive the door body (1) to move in the direction of entering the hearth (7) and can further drive the door body (1) to move in the direction away from the hearth (7). The furnace door suitable for temperature zone control of the annular furnace is of a movable structure, two adjacent zones can be separated, smooth passing of materials is not affected, and the temperature of different zones can be better controlled.

Description

Technical Field

[0001] The invention relates to the technical field of heat treatment equipment, in particular to a furnace door suitable for temperature zoning control of an annular furnace, and also to an annular furnace. Background Art

[0002] The high temperature annealing ring furnace is one of the key industrial furnace equipment for producing high-end oriented silicon steel, and is known as the jewel in the crown of industrial furnaces. The high temperature annealing ring furnace divides the space inside the furnace into different control areas according to the requirements of the heating process to heat or cool the materials. For example, the high temperature annealing ring furnace is divided into a preheating section, a first soaking section, a second heating section, a second soaking section, a first cooling section, a second cooling section, a third cooling section, a fourth cooling section, and an unloading and loading area.

[0003] Two adjacent sections may have different heating temperatures, or two different temperature systems for heating and cooling. In order to achieve precise temperature control, a partition device needs to be set between the two adjacent sections, and it needs to be opened and closed to allow materials to pass through as the bottom of the annular furnace rotates.

[0004] In the prior art, devices such as hold-down beams and water-cooled beams that separate the space inside the furnace are mostly fixed structures, which results in the inability to completely separate two adjacent sections and the problem of poor temperature control capability. In particular, when adjacent sections have two different temperature systems, heating and cooling, it is even more difficult to achieve temperature control. Summary of the invention

[0005] In order to solve the problem that the furnace door inside the existing annular furnace cannot separate two adjacent sections, the present invention provides a furnace door and annular furnace suitable for temperature zoning control of the annular furnace. The furnace door suitable for temperature zoning control of the annular furnace is a movable structure, which can separate two adjacent sections without affecting the smooth passage of materials, and can also better control the temperature of different sections.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A furnace door suitable for temperature zoning control of an annular furnace comprises a door body and a driving mechanism connected in sequence, wherein the driving mechanism can drive the door body to move in a direction entering the furnace, and can also drive the door body to move in a direction away from the furnace.

[0008] The beneficial effects of the present invention are as follows: the furnace door suitable for temperature zoning control of the annular furnace is a movable structure, which can separate two adjacent sections without affecting the smooth passage of materials, and can better control the temperature of different sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0010] Figure 1 It is a schematic diagram of the main view of the furnace door suitable for temperature zone control of the annular furnace according to the present invention.

[0011] Figure 2 It is a left view schematic diagram of the furnace door suitable for temperature zone control of the annular furnace according to the present invention.

[0012] Figure 3 It is a structural diagram of the door body.

[0013] Figure 4 yes Figure 1 A magnified schematic diagram of area A in the middle.

[0014] Figure 5 It is a cross-sectional schematic diagram of the door body and ring beam.

[0015] Figure 6 yes Figure 5 Enlarged diagram of the middle left part.

[0016] Figure 7 It is a connection diagram of the horizontal pipe section and the lower protective plate.

[0017] Description of reference numerals:

[0018] 1. Door body; 2. Ring beam; 3. Water seal structure; 4. Sealing cylinder; 5. Driving mechanism; 6. Furnace top; 7. Furnace chamber; 8. Furnace bottom; 9. Materials;

[0019] 11. Upper connecting section; 12. Lower dividing section; 13. Water cooling pipe; 14. Annular water sealing knife; 15. High temperature resistant soft sealing ring;

[0020] 21. beam wall; 22. receiving inner cavity; 23. inner guide plate;

[0021] 31. Annular water tank; 32. Refractory material layer; 33. Overflow tube; 34. Drainage outlet;

[0022] 51. Hydraulic cylinder; 52. Pulley transmission assembly;

[0023] 61. Furnace door installation through hole;

[0024] 131, vertical pipe section; 132, horizontal pipe section; 133, thermal insulation material layer; 134, thermal insulation material block; 135, outer guide plate; 136, lower protection plate;

[0025] 521. Fixed pulley; 522. Wire rope. DETAILED DESCRIPTION

[0026] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] For the convenience of understanding and description, an absolute positional relationship is adopted in the following description of the present invention. Without special explanation, the orientation word "upper" represents Figure 1 the upper side direction in Figure 1 the lower side direction in Figure 1 the left side direction in Figure 1 the right side direction in Figure 1 the paper surface of Figure 1 and points to the inner side of the paper surface, and the orientation word "rear" represents perpendicular to

[0028] such as Figure 1 and Figure 2 shown, a furnace door applicable to the temperature zone control of a ring furnace described in an embodiment of the present invention includes a door body 1 and a driving mechanism 5 connected in sequence. The door body 1 is generally an upright plate-like structure. The driving mechanism 5 can drive the door body 1 to move in the direction of entering the furnace chamber 7 (until two adjacent sections on the front and rear sides of the door body 1 in the furnace chamber 7 are partitioned), and the driving mechanism 5 can also drive the door body 1 to move away from the furnace chamber 7.

[0029] The furnace door applicable to the temperature zone control of the ring furnace is a movable structure. The driving mechanism 5 can drive the door body 1 to move up and down, left and right, move up and down plus rotate, or move left and right plus rotate to partition or conduct two adjacent sections. The furnace door can not only partition two adjacent sections, but also does not affect the smooth passage of materials, and can better realize the control of the temperature of different sections.

[0030] Such as Figures 1 to 3 shown, the cross-section of the door body 1 is generally a T-shaped structure. The door body 1 includes an upper connecting section 11 and a lower separating section 12 connected up and down. The length of the upper connecting section 11 is greater than the length of the lower separating section 12, and the width of the upper connecting section 11 is greater than the width of the lower separating section 12. The upper connecting section 11 is always located outside the furnace chamber 7, the upper connecting section 11 is located above the furnace chamber 7, and the lower end of the lower separating section 12 is located inside the furnace chamber 7. Preferably, the driving mechanism 5 can drive the door body 1 to move up and down.

[0031] The door body 1 is a water-cooled frame structure, and the door body 1 also contains a water-cooling pipe 13. The water-cooling pipe 13 has a serpentine structure. The water-cooling pipe 13 contains multiple vertical pipe sections 131 and multiple horizontal pipe sections 132. The vertical pipe sections 131 extend in the up and down directions, and the horizontal pipe sections 132 extend in the left and right directions. The multiple vertical pipe sections 131 are arranged at intervals in the left and right directions, and a part of the vertical pipe sections 131 is located in the lower partition section 12.

[0032] like Figures 1 to 3 As shown, in the lower partition section 12, a heat-insulating material layer 133 is arranged outside the vertical pipe section 131, and a heat-insulating material block 134 is filled between two adjacent vertical pipe sections 131. The weight of the heat-insulating material layer 133 and the heat-insulating material block 134 is borne by the water-cooling pipe 13. The heat-insulating material layer 133 is cast, and the heat-insulating material layer 133 can reduce heat loss. The heat-insulating material block 134 is a refractory fiber module.

[0033] The door body 1 adopts the above structure to form an effective separation of two adjacent sections on the front and rear sides of the door body 1 in the furnace 7, so as to meet the temperature control requirements of adjacent areas inside the annular heating furnace; at the same time, the fiber module structure can withstand the different temperatures on both sides well, and there is no deformation or damage caused by temperature difference.

[0034] like Figure 1 to Figure 2 As shown, the furnace door suitable for temperature zoning control of an annular furnace also includes a ring beam 2, which can protect the furnace refractory material at the opening position and withstand the collision or extrusion of the furnace door during the lifting process. The ring beam 2 includes a beam wall 21 and a receiving cavity 22, both of which are rectangular structures. The ring beam 2 is matched with the size of the door body 1 to meet the space required for the lifting action of the door body 1.

[0035] The main frame of the ring beam 2 is a water-cooled beam with a rectangular cross-section, and the inner side of the ring beam 2 is lined with refractory material. The ring beam 2 is located above the furnace roof 6, and the ring beam 2 and the furnace roof 6 are stacked and connected up and down. The beam wall 21 of the ring beam 2 is sleeved outside the door body 1, and the door body 1 is located in the accommodating inner cavity 22, and a rectangular gap is formed between the ring beam 2 and the door body 1.

[0036] like Figures 5 to 7 As shown, in the lower partition section 12, a plurality of outer guide plates 135 are arranged on the outer circumference of the vertical pipe section 131, and a plurality of inner guide plates 23 are arranged on the inner circumference of the ring beam 2. The outer guide plates 135 and the inner guide plates 23 extend in the up-down direction, and the outer guide plates 135 and the inner guide plates 23 correspond to each other one by one, and the outer guide plates 135 and the inner guide plates 23 can contact each other. The lower end of the horizontal pipe section 132 located at the lower end of the door body 1 is connected to the lower protective plate 136. The cross-sections of the outer guide plates 135, the inner guide plates 23 and the lower protective plate 136 can all be T-shaped.

[0037] The outer guide plate 135, the inner guide plate 23 and the lower protection plate 136 are all made of heat-resistant steel. The outer guide plate 135 and the inner guide plate 23 protect the water-cooling pipe 13, the insulation material layer 133 and the insulation material block 134 during the lifting process. The outer guide plate 135 and the inner guide plate 23 can also play a guiding role during the lifting process. The lower protection plate 136 can protect the water-cooling pipe 13 during the lifting process.

[0038] like Figure 1 and Figure 4 As shown, the furnace door suitable for temperature zoning control of the annular furnace also includes a water seal structure 3, the water seal structure 3 includes an annular water trough 31, the annular water trough 31 is located above the ring beam 2, the annular water trough 31 is sleeved outside the door body 1, the opening of the annular water trough 31 faces upward, water is arranged in the annular water trough 31, the upper end of the upper connecting section 11 is sealed and connected with an annular water seal knife 14, the annular water seal knife 14 can be inserted into the annular water trough 31, thereby realizing water sealing.

[0039] like Figure 1 to Figure 2 As shown, the furnace door suitable for the temperature zoning control of the annular furnace also includes a sealing cylinder 4, the sealing cylinder 4, the annular water tank 31 and the ring beam 2 are arranged in sequence from top to bottom, the sealing cylinder 4 is an upright cylindrical structure, the sealing cylinder 4 is sleeved outside the door body 1, the upper end of the sealing cylinder 4 is in a closed state, the lower end of the sealing cylinder 4 is in an open state, the lower end of the sealing cylinder 4 is matched with the upper end of the outer wall of the annular water tank 31 and sealed, the upper connecting section 11 is fixedly connected with a high temperature resistant soft sealing ring 15 (also called a high temperature resistant soft sealing strip), and the high temperature resistant soft sealing ring 15 is sealed and connected to the sealing cylinder 4. The four sides of the door body 1 are in contact with the sealing cylinder 4 through the high temperature resistant soft sealing ring 15, forming a "dynamic" seal, reducing the escape of gas when the furnace door is not protected by water seal during the lifting process.

[0040] When the door body 1 is in the ascending position, the door body 1 is pulled out from the heating space of the furnace, the temperature is high, and it is easy to damage the surrounding equipment. The sealing cylinder 4 can prevent the door body 1 from radiating high temperature to the surrounding equipment; at the same time, the sealing cylinder 4 also isolates the furnace door from the external environment, reducing the impact of the external environment on the furnace door. The high temperature resistant soft sealing ring 15 is formed by wrapping a heat-resistant steel wire braided mesh with a reinforced ceramic fiber cloth, and the steel wire braided mesh increases the wear resistance of the high temperature resistant soft sealing ring 15.

[0041] like Figure 4As shown, the inner circumference of the annular water tank 31 is connected with a refractory material layer 32, and the upper connecting section 11 can match and fit with the refractory material layer 32. Since the upper end of the annular water tank 31 is blocked by the sealing cylinder 4, in order to observe the water level in the annular water tank 31, the annular water tank 31 is connected with an overflow cylinder 33 using the communicating vessel principle, the upper end of the overflow cylinder 33 is in an open state, the lower end of the overflow cylinder 33 is in a closed state, and the lower end of the overflow cylinder 33 is connected with the lower end of the annular water tank 31. The overflow cylinder 33 can display the water level in the annular water tank 31, and the overflow cylinder 33 is connected with a drain port 34. The height of the overflow cylinder 33 can be set according to the required water level height. The height of the overflow cylinder 33 shown in the figure is a fixed height, and can be designed as an adjustable structure according to the needs.

[0042] The driving mechanism 5 can drive the door body 1 to move up and down. The driving mechanism 5 includes a hydraulic cylinder 51 and a pulley transmission assembly 52 connected in sequence. The pulley transmission assembly 52 includes a fixed pulley 521 and a wire rope 522. The hydraulic cylinder 51 is located outside the furnace 7 and is in an upright state. The hydraulic cylinder 51 is connected to the door body 1 through a wire rope 522. The fixed pulley 521 is located above the door body 1, especially the fixed pulley 521 is located above the sealing cylinder 4, and the wire rope 522 bypasses the fixed pulley 521. In order to improve the stability of the furnace door lifting process, a structure with 4 lifting points is adopted; and the spacing between the lifting points in the thickness direction of the furnace door is increased. Complete the lifting action, so that the materials on the bottom of the annular furnace; the multi-hanging point structure can effectively reduce the swing during the lifting process, the action is more stable, the collision is reduced, and the life of the furnace door is increased.

[0043] The following is an annular furnace, which includes a furnace top 6, a furnace chamber 7 and a furnace bottom 8. The annular furnace also includes the above-mentioned furnace door suitable for temperature zoning control of the annular furnace. A furnace door installation through hole 61 is provided in the furnace top 6, and the door body 1 is inserted into the furnace door installation through hole 61.

[0044] The ring beam 2 and the furnace top 6 are sealed and connected, the accommodating inner cavity 22 of the ring beam 2 and the furnace door mounting through hole 61 of the furnace top 6 are connected up and down, the cross-sectional area of ​​the accommodating inner cavity 22 is smaller than the cross-sectional area of ​​the furnace door mounting through hole 61, the accommodating inner cavity 22 and the furnace door mounting through hole 61 are roughly concentric circles, and the center line of the accommodating inner cavity 22 coincides with the center line of the furnace door mounting through hole 61.

[0045] The working process of the furnace door and the annular furnace suitable for the temperature zone control of the annular furnace is introduced below.

[0046] The material 9 (such as a steel coil) is in the furnace 7, the door body 1 is at the lower limit position, and the annular water seal knife 14 is inserted under the water level of the annular water tank 31 to form a "static" seal to reduce the escape of gas at the opening. When the material 9 needs to cross the door body 1, the drive mechanism 5 drives the door body 1 to move upward, and the lower end of the door body 1 is slightly higher than the material 9. After the material 9 crosses the door body 1, the drive mechanism 5 drives the door body 1 to move downward.

[0047] The above is only a specific embodiment of the present invention, and cannot be used to limit the scope of the invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the protection scope of the present invention should still fall within the scope of the present invention. In addition, the technical features in the present invention can be freely combined with each other, with technical features and technical solutions, and with technical solutions.

Claims

1. A furnace door suitable for temperature zone control of an annular furnace, characterized in that: The furnace door suitable for temperature zoning control of an annular furnace comprises a door body (1) and a driving mechanism (5) connected in sequence, wherein the driving mechanism (5) can drive the door body (1) to move in a direction entering a furnace (7), and the driving mechanism (5) can also drive the door body (1) to move in a direction away from the furnace (7).

2. The furnace door suitable for temperature zone control of an annular furnace according to claim 1, characterized in that: The door body (1) comprises an upper connecting section (11) and a lower partition section (12) connected up and down, the upper connecting section (11) is located above the furnace (7), and the lower end of the lower partition section (12) is located inside the furnace (7), and the driving mechanism (5) can drive the door body (1) to move up and down.

3. The furnace door suitable for temperature zone control of an annular furnace according to claim 2, characterized in that: The door body (1) further comprises a water cooling pipe (13), the water cooling pipe (13) being of a serpentine structure, the water cooling pipe (13) comprising a plurality of vertical pipe sections (131) and a plurality of horizontal pipe sections (132), the plurality of vertical pipe sections (131) being arranged at intervals in the left-right direction, and a portion of the vertical pipe sections (131) being located in the lower partition section (12).

4. The furnace door suitable for temperature zone control of an annular furnace according to claim 3, characterized in that: In the lower partition section (12), a heat-insulating material layer (133) is arranged outside the vertical pipe section (131), and a heat-insulating material block (134) is filled between two adjacent vertical pipe sections (131).

5. The furnace door suitable for temperature zone control of an annular furnace according to claim 3, characterized in that: The furnace door suitable for temperature zoning control of an annular furnace also includes a ring beam (2), the ring beam (2) is sleeved outside the door body (1), and inside the lower partition section (12), an outer guide plate (135) is arranged on the outer peripheral surface of the vertical pipe section (131), and an inner guide plate (23) is arranged on the inner peripheral surface of the ring beam (2), the outer guide plate (135) and the inner guide plate (23) both extend in the up-down direction, and the outer guide plate (135) and the inner guide plate (23) correspond one to one, and the lower end of the horizontal pipe section (132) located at the lower end of the door body (1) is externally connected to a lower protective plate (136).

6. The furnace door suitable for temperature zone control of an annular furnace according to claim 2, characterized in that: The furnace door suitable for the temperature zone control of the annular furnace further comprises a water seal structure (3), the water seal structure (3) comprises an annular water groove (31), the annular water groove (31) is sleeved outside the door body (1), the upper end of the upper connecting section (11) is connected to an annular water seal knife (14), and the annular water seal knife (14) can be inserted into the annular water groove (31).

7. The furnace door suitable for temperature zone control of an annular furnace according to claim 6, characterized in that: The inner circumferential surface of the annular water trough (31) is connected to a refractory material layer (32), the upper connecting section (11) can be matched and fitted with the refractory material layer (32), the annular water trough (31) is connected to an overflow tube (33), the lower end of the overflow tube (33) is communicated with the lower end of the annular water trough (31), the upper end of the overflow tube (33) is in an open state, the overflow tube (33) can display the water level in the annular water trough (31), and the overflow tube (33) is connected to a drain outlet (34).

8. The furnace door suitable for temperature zone control of an annular furnace according to claim 6, characterized in that: The furnace door suitable for the temperature zone control of the annular furnace also includes a sealing cylinder (4), which is an upright cylindrical structure. The sealing cylinder (4) is sleeved outside the door body (1), the lower end of the sealing cylinder (4) is matched with the annular water tank (31) and is sealed and connected, and the upper connecting section (11) is fixedly connected with a high-temperature resistant soft sealing ring (15), and the high-temperature resistant soft sealing ring (15) is sealed and connected to the sealing cylinder (4).

9. The furnace door suitable for temperature zone control of an annular furnace according to claim 1, characterized in that: The driving mechanism (5) can drive the door body (1) to move up and down. The driving mechanism (5) comprises a hydraulic cylinder (51) and a pulley transmission assembly (52) which are connected in sequence. The pulley transmission assembly (52) comprises a fixed pulley (521) and a steel wire rope (522). The hydraulic cylinder (51) is connected to the door body (1) via the steel wire rope (522). The fixed pulley (521) is located above the door body (1), and the steel wire rope (522) passes around the fixed pulley (521).

10. An annular furnace, comprising a furnace top (6), a furnace chamber (7) and a furnace bottom (8), characterized in that: The annular furnace also includes a furnace door suitable for temperature zoning control of the annular furnace as described in claim 1, a furnace door installation through hole (61) is provided in the furnace top (6), and the door body (1) is inserted into the furnace door installation through hole (61).

Images