Furnace door sealing mechanism for heating furnace

Abstract

The furnace door sealing mechanism for the heating furnace comprises a fixed furnace door and a movable furnace door, the ends, attached to the movable furnace door, of the fixed furnace door are each provided with an inclined face, two parallel supporting rails are arranged on the outer side of the fixed furnace door, and the ends, located in the door closing direction, of the two supporting rails are each provided with a turning section. The angle of the turning section is equal to the angle of the inclined surface, and a group of roller mechanisms is arranged in each of the two supporting rails; each roller mechanism comprises a roller seat, rollers are arranged on the two sides of each roller seat, a connecting shaft A extending downwards is arranged at the bottom end of each roller seat, a connecting shaft B extending upwards is arranged at the top end of each roller seat, a support is arranged at each of the two ends of the outer side of the movable furnace door, and the two supports are rotationally connected with the connecting shafts A of the two roller mechanisms respectively; a driving mechanism is arranged above the fixed furnace door and is used for driving the movable furnace door to be closed or opened; the sealing performance of the furnace door is improved, and leakage of smoke in the furnace is avoided.

Description

Technical Field

[0001] This utility model relates to the field of steel production technology, specifically to a sealing furnace door mechanism for a heating furnace. Background Technology

[0002] Steel production enterprises mainly produce steel of various specifications. Most steel structure products require hot processing during the manufacturing process, which is generally done by heating furnaces. However, existing heating furnaces have poor furnace door sealing, which leads to the leakage of flue gas from the furnace. This not only affects the atmosphere inside the furnace but also has an adverse impact on the working environment, which is detrimental to the physical and mental health of workers. Utility Model Content

[0003] The purpose of this utility model is to solve the technical problems mentioned in the background art and to provide a sealing furnace door mechanism for heating furnaces.

[0004] This utility model provides the following technical solution: a sealing furnace door mechanism for a heating furnace, comprising a fixed furnace door and a movable furnace door. Both the fixed and movable furnace doors have inclined surfaces at their contact points. Two parallel support rails are provided on the outer side of the fixed furnace door. Each support rail has a turning section at its closing end, the angle of which is equal to the angle of the inclined surface. Each of the two support rails contains a set of roller mechanisms. The roller mechanisms include roller seats with rollers on both sides. A downwardly extending connecting shaft A is located at the bottom of the roller seat, and an upwardly extending connecting shaft B is located at the top of the roller seat. A bracket is located at each end of the outer side of the movable furnace door, and the two brackets are rotatably connected to the connecting shafts A of the two sets of roller mechanisms, respectively. A driving mechanism is located above the fixed furnace door. The driving mechanism includes a drive shaft, a cylindrical gear, and a spur rack. The cylindrical gear is mounted on the drive shaft, and the spur rack meshes with the cylindrical gear. The bottom ends of the spur rack are rotatably connected to the connecting shafts B of the two sets of roller mechanisms, respectively. A motor is connected to one end of the drive shaft.

[0005] Preferably, the support rail includes two oppositely arranged channel steels with a certain gap between them, and the connecting shaft A and connecting shaft B extend outward from the gap.

[0006] Preferably, the roller seat is also equipped with a guide wheel, the axis of which is perpendicular to the axis of the roller, and the guide wheel is located at the gap between the two channel steels.

[0007] Preferably, the fixed furnace door and the movable furnace door are provided with a heat-resistant sealing element on their inclined surfaces.

[0008] Preferably, the angle range of the turning section of the support track is within 30°-45°, and an arc transition section is provided at the connection between the turning section and the straight section.

[0009] Compared with the prior art, the beneficial effects of this utility model are: it improves the sealing performance of the furnace door and prevents the leakage of flue gas from the furnace. Attached Figure Description

[0010] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0011] Figure 2 This is a top view of the furnace door in the closed state of this utility model;

[0012] Figure 3 This is a top view of the furnace door in the open state of this utility model;

[0013] Figure 4 yes Figure 2 AA view;

[0014] Figure 5 yes Figure 2 BB view;

[0015] In the diagram: 1. Fixed furnace door; 2. Movable furnace door; 3. Bracket A; 4. Bracket B; 5. Spur rack; 6. Roller mechanism A; 7. Roller mechanism B; 71. Roller seat; 72. Connecting shaft B; 73. Roller; 74. Connecting shaft A; 8. Outer support rail; 9. Inner support rail; 10. Cylindrical gear; 11. Drive shaft. Detailed Implementation

[0016] Please see Figure 1-5 This embodiment describes a sealing furnace door mechanism for a heating furnace, comprising a fixed furnace door 1 and a movable furnace door 2. Both the fixed furnace door 1 and the movable furnace door 2 have inclined surfaces at their contact points. Two parallel support rails are provided on the outer side of the fixed furnace door 1. Each support rail has a turning section at its closing end, the angle of which is equal to the angle of the inclined surface. Each support rail contains a set of roller mechanisms. The roller mechanisms include a roller seat 71, with rollers 73 on both sides of the roller seat 71. A downwardly extending connecting shaft A74 is provided at the bottom end of the roller seat 71. The roller seat 71 has an upwardly extending connecting shaft B72 at its top. The movable furnace door has a bracket at each of its outer ends, and the two brackets are rotatably connected to the connecting shafts A74 of the two sets of roller mechanisms, respectively. The fixed furnace door 1 has a drive mechanism above it. The drive mechanism includes a drive shaft 11, a cylindrical gear 10, and a rack 5. The cylindrical gear 10 is mounted on the drive shaft 11, and the rack 5 meshes with the cylindrical gear 10. The bottom ends of the rack 5 are rotatably connected to the connecting shafts B72 of the two sets of roller mechanisms, respectively. One end of the drive shaft 11 is connected to a motor.

[0017] Preferably, the support rail includes two oppositely arranged channel steels with a certain distance between them, and the connecting shaft A74 and connecting shaft B72 extend outward from the distance.

[0018] Preferably, the roller seat 71 is also equipped with a guide wheel, the axis of which is perpendicular to the axis of the roller 73. The guide wheel is located at the gap between the two channel steels. By setting the guide wheel, the roller mechanism can move more smoothly along the support track and avoid jamming.

[0019] Preferably, the inclined surfaces of the fixed furnace door 1 and the movable furnace door 2 are provided with heat-resistant sealing elements.

[0020] Preferably, the angle range of the turning section of the support track is within 30°-45°, and an arc transition section is provided at the connection between the turning section and the straight section, so that the roller mechanism passes through the turning section more smoothly.

[0021] Mechanical limit switches are provided on the support rail at the closing and opening limit positions of the movable furnace door 2 to prevent the roller mechanism from slipping.

[0022] The working principle of this utility model is as follows: When the furnace door is open, such as Figure 3 As shown, the rack 5, movable furnace door 2, and two sets of roller mechanisms are all located on the right side of the support rail. At this time, the movable furnace door 2 is located outside the fixed furnace door 1. When the furnace door needs to be closed, the motor drives the drive shaft 11, which in turn drives the cylindrical gear 10 to rotate. The cylindrical gear 10 drives the rack 5 to move to the left. The rack 5 drives the two sets of roller mechanisms, which in turn drive the movable furnace door 2 to move to the left. When the movable furnace door 2 moves to the point where it connects with the fixed furnace door 1 on the inclined surface, the two sets of roller mechanisms also move to the corresponding turning section of the support rail. The roller 73 continues to move along the turning section, which will drive the movable furnace door 2 to move diagonally along the inclined surface, thereby completely closing the movable furnace door 2 and the fixed furnace door 1. When the movable furnace door 2 moves along the turning section, the rack 5 has a certain lateral displacement. Since the cylindrical gear 10 is relatively long, the rack 5 will not disengage from the cylindrical gear 10. The contact point between the movable furnace door 2 and the fixed furnace door 1 on the inclined surface is sealed by a sealing element to prevent flue gas from leaking out from the door gap. If you need to open the door again, simply reverse the drive motor.

Claims

1. A sealing furnace door mechanism for a heating furnace, characterized in that: The furnace includes a fixed furnace door and a movable furnace door. Both the fixed and movable furnace doors have an inclined surface at their contact points. The outer side of the fixed furnace door has two parallel support rails, each with a turning section at its closing end. The angle of the turning section is equal to the angle of the inclined surface. Each support rail contains a set of roller mechanisms. Each roller mechanism includes a roller seat with rollers on both sides. The bottom of the roller seat has a downward-extending connecting shaft A, and the top of the roller seat has an upward-extending connecting shaft B. The movable furnace door has a bracket at each end of its outer side, and the two brackets are rotatably connected to the connecting shafts A of the two sets of roller mechanisms. A drive mechanism is located above the fixed furnace door. The drive mechanism includes a drive shaft, a cylindrical gear, and a spur rack. The cylindrical gear is mounted on the drive shaft, and the spur rack meshes with the cylindrical gear. The bottom ends of the spur rack are rotatably connected to the connecting shafts B of the two sets of roller mechanisms. One end of the drive shaft is connected to a motor.

2. The sealing furnace door mechanism for a heating furnace according to claim 1, characterized in that: The support rail includes two oppositely arranged channel steels with a certain gap between them, and the connecting shaft A and connecting shaft B extend outward from the gap.

3. The sealing furnace door mechanism for a heating furnace according to claim 2, characterized in that: The roller seat is also equipped with a guide wheel, the axis of which is perpendicular to the axis of the roller, and the guide wheel is located at the gap between the two channel steels.

4. The sealing furnace door mechanism for a heating furnace according to claim 1, characterized in that: The fixed furnace door and the movable furnace door are equipped with heat-resistant sealing components on their beveled surfaces.

5. The sealing furnace door mechanism for a heating furnace according to claim 1, characterized in that: The angle range of the turning section of the support track is within 30°-45°, and an arc transition section is provided at the connection between the turning section and the straight section.

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