New furnace door device applied to sealing chamber of heat treatment furnace of silicon steel production line

Abstract

This application relates to a novel furnace door device applied to the sealing chamber of a heat treatment furnace in a silicon steel production line. It includes a sealing chamber located on one side of the furnace body along the direction of silicon steel strip movement. A sealing door is located on the side of the sealing chamber opposite to the furnace body along the direction of silicon steel strip movement. The sealing door includes an upper sealing door and a lower sealing door, with the lower sealing door fixed relative to the sealing chamber. Corresponding upper and lower sealing rollers are respectively installed on the upper and lower sealing doors. The silicon steel strip passes between the upper and lower sealing rollers and moves forward. A lifting assembly is provided on the upper side of the sealing chamber to drive the upper sealing door upward. A pressing assembly is also provided on the sealing chamber to press the upper sealing door against the sealing chamber along the direction of silicon steel strip movement. This application has the effect of improving sealing adjustment accuracy and sealing reliability.

Description

Technical Field

[0001] This application relates to the technical field of heat treatment furnaces, and in particular to a novel furnace door device for use in the sealed chamber of a heat treatment furnace in a silicon steel production line. Background Technology

[0002] Silicon steel, as a key functional metallic material, is widely used in high-end manufacturing fields such as power, electronics, and automobiles. Due to its extremely high performance requirements, the production process of silicon steel is highly complex and demands strict precision control. The heat treatment process, as a core component of silicon steel production, directly impacts product quality through the performance of its equipment. Within the structure of the heat treatment furnace, the sealing system is particularly crucial, its main function being to isolate the protective atmosphere inside the furnace from external air exchange and to maintain a constant pressure within the furnace. The sealing door within the sealing system, as a frequently operated component, has a direct impact on the heat treatment effect due to its structural design and operational stability.

[0003] Traditional heat treatment furnace sealing door lifting mechanisms typically employ a combination of sprockets, chains, and cylinders, relying on preset cylinder strokes to control the opening and closing of the furnace door and the spacing between the sealing rollers and the steel strip. However, this structure cannot achieve continuously adjustable lifting of the sealing door, resulting in inaccurate matching between the sealing rollers and the steel strip, thus affecting the sealing effect and even adversely impacting furnace pressure control.

[0004] The aforementioned technologies suffer from problems such as insufficient sealing adjustment accuracy and poor reliability. There is an urgent need for a new type of sealing door device that is novel in structure, reliable in performance, and easy to maintain. Utility Model Content

[0005] To improve the accuracy and reliability of sealing adjustment, this application provides a novel furnace door device for use in the sealing chamber of a heat treatment furnace in a silicon steel production line.

[0006] The novel furnace door device for use in the sealing chamber of a heat treatment furnace in a silicon steel production line, as provided in this application, adopts the following technical solution: A novel furnace door device for use in the sealing chamber of a heat treatment furnace in a silicon steel production line includes a sealing chamber located on one side of the furnace body along the direction of silicon steel strip movement. A sealing door is located on the side of the sealing chamber opposite to the furnace body along the direction of silicon steel strip movement. The sealing door includes an upper sealing door and a lower sealing door. The lower sealing door is fixed relative to the sealing chamber. Corresponding upper and lower sealing rollers are respectively installed on the upper and lower sealing doors. The silicon steel strip passes between the upper and lower sealing rollers and moves forward. A lifting assembly is installed on the upper side of the sealing chamber to drive the upper sealing door upward. A pressing assembly is also installed on the sealing chamber to press the upper sealing door against the sealing chamber along the direction of silicon steel strip movement.

[0007] By adopting the above technical solution, the structure realizes the controllable lifting and precise pressing of the upper sealing door in the sealing door body, which helps to flexibly adjust the sealing gap according to the thickness of the silicon steel strip, improve the sealing effect, reduce the leakage of protective atmosphere, and enhance the stability and adaptability of the system.

[0008] Preferably, the lifting assembly includes a drive shaft, the axis of which is parallel to the width direction of the sealing chamber. A connecting rod one and a connecting rod two are symmetrically fixed on the drive shaft. The length directions of the connecting rod one and the connecting rod two are parallel to any radial direction of the drive shaft. A counterweight is fixed to the end of the connecting rod one that is away from the drive shaft. A lifting rod is hinged to the end of the connecting rod two that is away from the drive shaft. The other end of the lifting rod is hinged to the upper side of the upper sealing door. A lifting drive mechanism for driving the drive shaft to rotate is provided on the sealing chamber.

[0009] By adopting the above technical solution, and by setting different lengths for connecting rod one and connecting rod two, and after balancing with a counterweight, the rotation of the drive shaft can smoothly drive the relative rotation of the connecting rods on both sides, thereby realizing the lifting and lowering of the upper sealing door. This can avoid structural wear or excessive energy consumption caused by direct drive, and improve the control accuracy and service life of the lifting structure.

[0010] Preferably, the lifting drive mechanism includes a drive motor, the drive motor body is fixed to the outside of the sealed chamber, and the output shaft of the drive motor drives the drive shaft to rotate around its own axis through a worm gear structure.

[0011] By adopting the above technical solution, a worm gear structure is used to drive the drive shaft to rotate, which improves transmission efficiency and positioning stability, and has strong self-locking performance, ensuring that the upper sealing door will not slide down during operation, thus improving the safety of the device.

[0012] Preferably, an encoder is also provided on the output shaft of the drive motor.

[0013] By adopting the above technical solution and setting the encoder to provide real-time feedback on the output status of the drive motor, the lifting height can be precisely controlled, and the position of the upper sealing door can be adjusted with high precision. This meets the dynamic adjustment requirements of the upper sealing door height for different production conditions required by silicon steel strips of different thicknesses.

[0014] Preferably, the pressing assembly includes a support frame fixed relative to the sealing chamber, a connecting shaft is provided on the support frame, the axis of the connecting shaft is parallel to the width direction of the sealing chamber, the connecting shaft and the support frame are rotatably connected around their own axis, a pressing block is fixed on the connecting shaft, a pressing block is provided on the upper sealing door, and a pressing drive mechanism for driving the connecting shaft to rotate is also provided on the support frame. When the upper sealing roller and the lower sealing roller are respectively pressed against the upper and lower sides of the silicon steel strip, the pressing drive mechanism drives the connecting shaft to rotate so that the pressing block presses against the pressing block.

[0015] By adopting the above technical solution, the upper sealing door is pressed along the forward direction of the steel belt by combining the connecting shaft and the pressing block, which improves the fit of the sealing structure, effectively resists the interference of internal pressure fluctuations on the sealing effect, and enhances the overall sealing reliability.

[0016] Preferably, the part of the pressing block that contacts the abutting block is an arc-shaped surface, and multiple pressing blocks and abutting blocks are respectively arranged at intervals along the axis of the connecting shaft.

[0017] By adopting the above technical solution, the arc-shaped surface keeps the upper sealing door within a certain height range, allowing all pressing blocks to contact the abutting blocks, thereby improving the adaptability of the pressing assembly. Multiple sets of pressing and abutting blocks enhance contact stability and pressing uniformity, disperse sealing stress, reduce localized wear, and extend the service life of the pressing assembly.

[0018] Preferably, the pressing drive mechanism includes a drive cylinder, the end of the drive cylinder body away from the drive cylinder piston rod is hinged to the sealing chamber, the end of the drive cylinder piston rod is hinged to a connecting rod, and the other end of the connecting rod is fixed relative to the connecting shaft.

[0019] By adopting the above technical solution, the connecting shaft can be effectively driven through the cooperation structure of the driving cylinder and the connecting rod, making the clamping action flexible and reliable, improving the clamping response speed and automation control capability, and reducing the complexity of operation.

[0020] Preferably, the cylinder body of the drive cylinder is located outside the lower sealing door.

[0021] By adopting the above technical solution, the drive cylinder is placed outside the lower sealing door, away from the high-temperature area of ​​the furnace body, to avoid cylinder aging or damage caused by long-term scouring by hot gas, thereby enhancing the heat resistance and operational reliability of the device.

[0022] Preferably, the sealing door body is also provided with a nitrogen pipeline, and the outlet of the nitrogen pipeline is located on the side opposite to the upper sealing roller and the lower sealing roller, so that a nitrogen chamber is formed inside the sealing door body.

[0023] By adopting the above technical solution, a nitrogen pipeline is set up to form a nitrogen chamber, which forms an auxiliary sealing gas curtain, effectively preventing outside air from seeping into the heat treatment furnace, further ensuring the purity of the protective atmosphere inside the furnace, and improving the overall sealing capability of the sealing system.

[0024] Preferably, a sealing ring is provided between the sealing door body and the sealing chamber.

[0025] By adopting the above technical solutions, the sealing ring can improve the sealing performance of the structural contact parts, reduce the risk of gas leakage, and enhance the overall sealing continuity and reliability of the sealing structure.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up a lifting assembly with a worm gear and a motor encoder, high-precision adjustable control of the height of the upper sealing door can be achieved. The sealing gap can be flexibly set according to the thickness of the silicon steel strip, thereby optimizing the bonding effect between the sealing roller and the steel strip, ensuring the stability of the sealing performance, and reducing the leakage of the protective atmosphere. 2. By adopting structural designs such as connecting rod counterweight, arc-shaped contact clamping block, and external cylinder, not only is the operational stability and reliability of the lifting and clamping structure improved, but also the thermal damage to the clamping components by high-temperature gas is effectively avoided, extending the service life of the clamping mechanism and reducing equipment failure rate and maintenance costs. 3. By setting up a nitrogen pipeline to form a nitrogen chamber in the sealed door, and installing a sealing ring at the contact point between the sealed door and the sealed chamber, a double sealing structure is formed. This not only effectively prevents external air from entering the furnace and ensures the purity of the furnace atmosphere, but also improves the airtightness and anti-interference ability of the overall sealing system. Attached Figure Description

[0027] Figure 1 This is a front view of the operation side of the heat treatment furnace body, which is the main feature of this embodiment. Figure 2 This is an isometric view of the overall structure of the novel furnace door device, which is the main feature of this application.

[0028] Reference numerals: 1. Sealing chamber; 2. Sealing door; 21. Nitrogen pipeline; 22. Sealing ring; 23. Upper sealing door; 231. Upper sealing roller; 24. Lower sealing door; 241. Lower sealing roller; 25. Support frame; 3. Lifting assembly; 31. Drive shaft; 32. Connecting rod one; 33. Counterweight; 34. Connecting rod two; 35. Lifting rod; 36. Fixing plate; 37. Connecting rod three; 38. Drive motor; 39. Worm gear structure; 4. Pressing assembly; 41. Connecting shaft; 42. Pressing block; 421. Arc-shaped surface; 43. Abutting block; 44. Connecting rod; 45. Drive cylinder; 100. Furnace body; 200. Silicon steel strip. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0030] This application discloses a novel furnace door device applied to the sealing chamber of a heat treatment furnace in a silicon steel production line.

[0031] See Figures 1-2A novel furnace door device, applied to the sealing chamber of a heat treatment furnace in a silicon steel production line, is installed on one side of the furnace body 100 along the advancing direction of the silicon steel strip 200. It includes a sealing chamber 1, and a sealing door 2 is installed on the side of the sealing chamber 1 opposite to the furnace body 100 along the advancing direction of the silicon steel strip 200. A sealing ring 22 is installed between the sealing door 2 and the sealing chamber 1. The sealing door 2 includes an upper sealing door 23 and a lower sealing door 24. The lower sealing door 24 is fixed relative to the sealing chamber 1. Corresponding upper sealing rollers 231 and lower sealing rollers 241 are respectively installed on the upper sealing door 23 and lower sealing rollers 241. The silicon steel strip 200 passes through and advances between the upper sealing rollers 231 and lower sealing rollers 241. A nitrogen pipeline 21 is also installed on the sealing door 2. The outlet of the nitrogen pipeline 21 is located on the side opposite to the upper sealing rollers 231 and lower sealing rollers 241, forming a nitrogen chamber inside the sealing door 2. A lifting assembly 3 is provided on the upper side of the sealing chamber 1 to drive the upper sealing door 23 to move upward. A pressing assembly 4 is also provided on the sealing chamber 1 to press the upper sealing door 23 against the sealing chamber 1 along the forward direction of the silicon steel belt 200.

[0032] The lifting assembly 3 includes a drive shaft 31, the axis of which is parallel to the width direction of the sealing chamber 1. Connecting rod 1 32 and connecting rod 2 34 are symmetrically fixed on the drive shaft 31. The length directions of connecting rod 1 32 and connecting rod 2 34 are parallel to any radial direction of the drive shaft 31. A counterweight 33 is fixed to one end of connecting rod 1 32 away from the drive shaft 31. A lifting rod 35 is hinged to one end of connecting rod 2 34 away from the drive shaft 31. A fixing plate 36 is hinged to the other end of the lifting rod 35. The fixing plate 36 is detachably fixed to the upper side of the upper sealing door 23. A lifting drive mechanism that drives the drive shaft 31 to rotate is provided on the sealing chamber 1. One counterweight 33 is provided at each end of the drive shaft 31 along its axial direction. Each counterweight 33 is correspondingly provided with a lifting rod 35, a fixing plate 36, a connecting rod 1 32, and a connecting rod 2 34.

[0033] The lifting drive mechanism includes a drive motor 38, whose body is fixed to the outside of the sealed chamber 1. A connecting rod 37 is also fixed on the drive shaft 31. The output shaft of the drive motor 38 drives the connecting rod 37 to rotate around the axis of the drive shaft 31 through a worm gear structure 39. An encoder is also installed on the output shaft of the drive motor 38. The operator can control the rotation angle of the drive shaft 31 by changing the programming through the control program, in conjunction with the encoder and the drive motor 38, thereby controlling the lifting height of the upper sealed door 23.

[0034] The clamping assembly 4 includes a support frame 25 fixed relative to the sealing chamber 1. A connecting shaft 41 is mounted on the support frame 25, with its axis parallel to the width direction of the sealing chamber 1. The connecting shaft 41 and the support frame 25 are rotatably connected around their own axis. A clamping block 42 is fixed on the connecting shaft 41, and a pressing block 43 is mounted on the upper sealing door 23. The support frame 25 also includes a clamping drive mechanism for driving the connecting shaft 41 to rotate. The clamping drive mechanism includes a drive cylinder 45. One end of the cylinder body of the drive cylinder 45, away from the piston rod, is hinged to the sealing chamber 1. A connecting rod 44 is hinged to the end of the piston rod of the drive cylinder 45, and the other end of the connecting rod 44 is fixed relative to the connecting shaft 41. The contact portion between the clamping block 42 and the pressing block 43 is an arc-shaped surface 421. Multiple clamping blocks 42 and pressing blocks 43 are respectively arranged at intervals along the axis of the connecting shaft 41. When the upper sealing roller 231 and the lower sealing roller 241 abut against the upper and lower sides of the silicon steel strip 200 respectively, the piston rod of the drive cylinder 45 extends and retracts, thereby driving the connecting shaft 41 to rotate so that the arc-shaped surface 421 of each pressing block 42 abuts against the corresponding pressing block 43. The pressing drive mechanism is located on one side of the sealing door body 2 along the width direction of the sealing chamber 1, and the cylinder body of the drive cylinder 45 is located on the outside of the lower sealing door 24.

[0035] The implementation principle of the novel furnace door device applied to the sealing chamber of the heat treatment furnace in the embodiment of this application is as follows: The operator can control the distance between the upper sealing door 23 and the lower sealing door 24 by changing the programmed control program, thereby controlling the interval between the upper sealing roller 231 and the lower sealing roller 241 to adapt to silicon steel strips 200 of different thicknesses. When the upper sealing door 23 descends to the working height, the operator controls the piston rod of the drive cylinder 45 to extend and retract through the control program, causing the connecting rod 44 to rotate relative to each other, thereby causing the rotating shaft to rotate relative to each other. The rotating shaft causes each pressing block 42 to press against the corresponding pressing block 43, thus pressing the sealing door body 2 against the side of the sealing chamber 1.

[0036] Meanwhile, in the event of an incident such as the breakage of the silicon steel strip 200, the operator can first control the piston rod of the drive cylinder 45 to extend, causing each clamping block 42 to separate from the clamping block 43. At the same time, the operator can control the drive motor 38, thereby driving the drive shaft 31 to rotate. The drive shaft 31 drives the connecting rod 37 through the worm gear, causing the drive shaft 31 to rotate, causing the two sets of connecting rods 34 to rotate relative to each other. The two lifting rods 35 drive the upper sealing door 23 to lift upward, thus opening the door and enabling maintenance.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A novel furnace door device applied to the sealing chamber of a heat treatment furnace in a silicon steel production line, characterized in that: The system includes a sealing chamber (1) located on one side of the furnace body (100) along the direction of the silicon steel belt (200). A sealing door (2) is provided on the side of the sealing chamber (1) away from the furnace body (100) along the direction of the silicon steel belt (200). The sealing door (2) includes an upper sealing door (23) and a lower sealing door (24). The lower sealing door (24) is fixed relative to the sealing chamber (1). The upper sealing door (23) and the lower sealing door (24) are respectively provided with corresponding upper sealing rollers (231) and lower sealing rollers (241). The silicon steel belt (200) passes through the upper sealing rollers (231) and lower sealing rollers (241) and moves forward. A lifting assembly (3) is provided on the upper side of the sealing chamber (1) to drive the upper sealing door (23) to move upward. A pressing assembly (4) is also provided on the sealing chamber (1) to press the upper sealing door (23) against the sealing chamber (1) along the direction of the silicon steel belt (200).

2. The novel furnace door device applied to the sealing chamber of a heat treatment furnace in a silicon steel production line according to claim 1, characterized in that: The lifting assembly (3) includes a drive shaft (31), the axis of which is parallel to the width direction of the sealing chamber (1). A connecting rod 1 (32) and a connecting rod 2 (34) are symmetrically fixed on the drive shaft (31). The length direction of the connecting rod 1 (32) and the connecting rod 2 (34) is parallel to any radial direction of the drive shaft (31). A counterweight (33) is fixed at one end of the connecting rod 1 (32) away from the drive shaft (31). A lifting rod (35) is hinged at one end of the connecting rod 2 (34) away from the drive shaft (31). The other end of the lifting rod (35) is hinged to the upper side of the upper sealing door (23). A lifting drive mechanism that drives the drive shaft (31) to rotate is provided on the sealing chamber (1).

3. The novel furnace door device applied to the sealing chamber of a heat treatment furnace in a silicon steel production line according to claim 2, characterized in that: The lifting drive mechanism includes a drive motor (38), the body of which is fixed outside the sealed chamber (1), and the output shaft of the drive motor (38) drives the drive shaft (31) to rotate around its own axis through a worm gear structure (39).

4. The novel furnace door device applied to the sealing chamber of a heat treatment furnace in a silicon steel production line according to claim 3, characterized in that: An encoder is also provided on the output shaft of the drive motor (38).

5. The novel furnace door device applied to the sealing chamber of a heat treatment furnace in a silicon steel production line according to claim 1, characterized in that: The pressing assembly (4) includes a support frame (25) fixed relative to the sealing chamber (1). A connecting shaft (41) is provided on the support frame (25). The axis of the connecting shaft (41) is parallel to the width direction of the sealing chamber (1). The connecting shaft (41) and the support frame (25) are rotatably connected around their own axis. A pressing block (42) is fixed on the connecting shaft (41). A pressing block (43) is provided on the upper sealing door (23). A pressing drive mechanism for driving the connecting shaft (41) to rotate is also provided on the support frame (25). When the upper sealing roller (231) and the lower sealing roller (241) abut against the upper and lower sides of the silicon steel strip (200) respectively, the pressing drive mechanism drives the connecting shaft (41) to rotate so that the pressing block (42) abuts against the pressing block (43).

6. The novel furnace door device applied to the sealing chamber of a heat treatment furnace in a silicon steel production line according to claim 5, characterized in that: The part of the pressing block (42) that contacts the abutting block (43) is an arc-shaped surface (421). Multiple pressing blocks (42) and abutting blocks (43) are respectively arranged at intervals along the axis of the connecting shaft (41).

7. The novel furnace door device applied to the sealing chamber of a heat treatment furnace in a silicon steel production line according to claim 5, characterized in that: The pressing drive mechanism includes a drive cylinder (45), the cylinder body of the drive cylinder (45) is hinged to the sealing chamber (1) at one end away from the piston rod of the drive cylinder (45), and a connecting rod (44) is hinged to the end of the piston rod of the drive cylinder (45), and the other end of the connecting rod (44) is fixed relative to the connecting shaft (41).

8. The novel furnace door device applied to the sealing chamber of a heat treatment furnace in a silicon steel production line according to claim 7, characterized in that: The cylinder body of the drive cylinder (45) is located outside the lower sealing door (24).

9. The novel furnace door device applied to the sealing chamber of a heat treatment furnace in a silicon steel production line according to claim 1, characterized in that: The sealing door (2) is also provided with a nitrogen pipeline (21), and the outlet of the nitrogen pipeline (21) is located on the side opposite to the upper sealing roller (231) and the lower sealing roller (241), so that a nitrogen chamber is formed inside the sealing door (2).

10. The novel furnace door device applied to the sealing chamber of a heat treatment furnace in a silicon steel production line according to claim 1, characterized in that: A sealing ring (22) is provided between the sealing door body (2) and the sealing chamber (1).

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