Furnace door sealing device

Abstract

A furnace door sealing device comprises two oppositely-opened rectangular door leaves, and sealing pieces are arranged on the door leaves in a sliding mode. Blind grooves are formed in the upper sides and the lower sides of the door leaves, penetrate to the opening sides of the door leaves and are arranged to be communicated when the two door leaves are closed. The sealing piece comprises a sliding block arranged in the blind groove in a sliding mode and a vertically-arranged strip-shaped sealing plate, the two ends of the sealing plate are connected with the sliding block through fasteners, and the fasteners are arranged to be capable of adjusting the distance between the sealing plate and the sliding block. After the two door leaves are closed, the sealing piece slides to the position between the two door leaves, the sealing plate can cover the gap between the two door leaves, then the distance between the sealing plate and the sliding block is adjusted through the fastening piece till the sealing plate abuts against the door leaves, heat loss between the door leaves can be effectively prevented, and operation is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of furnace door sealing, in particular to a furnace door sealing device. Background Art

[0002] The double-door hot air box furnace is a type of industrial furnace primarily used for rapid quenching and annealing heat treatment of high-chromium and high-manganese steel castings, ductile iron, rolls, steel balls, 45 steel, and stainless steel. Box-type furnaces dissipate significant heat due to poor sealing of the furnace opening and door, resulting in a lower temperature than the center of the furnace chamber. This wastes energy and labor, and increases unit product consumption. Current furnace doors only feature sealing rings at the rear where they meet the furnace opening to reduce heat loss. However, when the double-door structure is closed, the two door leaves lack a close connection, and gaps can easily form between them. This results in a poorly sealed furnace door, significant heat loss within the furnace, and compromised workpiece heating efficiency, increasing energy consumption. Utility Model Content

[0003] In order to solve the technical problem in the above background technology that the double-door structure is not tightly sealed and there are gaps between the door leaves, the utility model provides a furnace door sealing device.

[0004] The technical solution of this utility model is as follows:

[0005] A furnace door sealing device comprises two rectangular door leaves that open in opposite directions, with sealing members slidingly provided on the door leaves; blind grooves are provided on the upper and lower sides of the door leaves, the blind grooves pass through to the open side of the door leaves, and are arranged to be connected when the two door leaves are closed; the sealing member comprises a sliding block slidingly provided in the blind groove, and a vertically arranged strip sealing plate, both ends of the sealing plate are connected to the sliding block by fasteners, and the fasteners are arranged to be able to adjust the distance between the sealing plate and the sliding block.

[0006] When the two doors are closed, slide the seal between them. Then, use the fasteners to adjust the distance between the sealing plate and the sliding block until the sealing plate and the door leaf are tightly against each other, covering the gap between the two leaves and preventing heat loss. After heating is complete, loosen the fasteners until the sealing plate and door leaf are separated. Then, push the sealing plate in either direction to open the door leaf.

[0007] Furthermore, the fastener includes a fastening bolt, one end of which is rotatably connected to the sealing plate and the other end of which is screwed to the sliding block. The end of the fastening bolt rotatably connected to the sealing plate is provided with a handle that passes through the sealing plate. By rotating the handle, the fastening bolt is rotated and advanced toward the sliding block. During the advancement, the sealing plate can follow the fastening bolt and move toward the sliding block until the sealing plate is tightly abutted against the door leaf.

[0008] Specifically, there are two fastening bolts, and the ends of the fastening bolts away from the sliding block are connected to the handle via a gear. The provision of two fastening bolts can ensure more uniform force when the sealing plate and the door leaf are pressed against each other. At the same time, the handle and the fastening bolts are connected via a gear, which ensures that when the handle is turned, both fastening bolts can rotate simultaneously.

[0009] In order to prevent the sealing plate from detaching from the sliding block or even the sealing plate from accidentally falling when the fastener is loosened, a notch is provided on the side of the sliding block close to the sealing plate, and a limit plate is provided at the opening of the notch. The two ends of the sealing plate are bent toward the sliding block, pass through the limit plate, and slide into the notch through the limit block.

[0010] Preferably, the depth of the recess is set so that when the limit block and the limit plate are in contact, the fastening bolt and the sliding block are separated, thereby preventing the sealing plate from accidentally falling off and ensuring that when the limit block and the limit plate are in contact, the fastening bolt and the sliding block are completely separated, allowing the seal to slide smoothly in the recess.

[0011] As a preferred embodiment, a plurality of springs are provided between the limit block and the bottom of the recess, which can not only prevent the sealing plate from rocking back and forth in the recess during movement, but also cushion the impact force of the limit block on the inner wall of the recess and the limit plate.

[0012] Furthermore, a rubber sealing strip is provided on the side of the sealing plate close to the door leaf to increase the sealing performance between the sealing plate and the door leaf and to buffer the force exerted by the sealing plate on the door leaf at the moment of pressing.

[0013] More preferably, the length of the blind groove along the width of the door leaf is no greater than 1 / 2 of the door leaf width and no less than 1 / 3 of the door leaf width, thereby ensuring that the seal has sufficient sliding space on the door leaf so that the door leaf can be opened and closed freely, while avoiding unnecessary processes caused by the blind groove being too large.

[0014] As a preferred embodiment, the width of the sealing plate along the width of the door leaf is no greater than the length of the blind groove and no less than 1 / 2 of the length of the blind groove. While the sealing plate is wide enough to cover the gap between the two door leaves, it also ensures that when the door leaves are opened, the sealing plate can slide to the side of either door leaf without affecting the normal opening or closing of the door leaves.

[0015] The above design provides the following beneficial effects: after placing a workpiece in the furnace, the two doors are closed, the seal is slid between the two doors so that the sealing plate covers the gap between the two doors, and the distance between the sealing plate and the sliding block is then adjusted using the fasteners until the sealing plate and the door are in close contact. The rubber sealing strip on one side of the sealing plate further seals the gap, effectively preventing heat loss between the door leaves. After heating in the furnace is complete, the handle is rotated in the opposite direction to loosen the fasteners. Once the sealing plate is disengaged from the door leaves, the sealing plate can be pushed in either direction to open the door leaves and remove the workpiece, making operation convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the attached figure:

[0017] Figure 1 This is a diagram showing the use of the furnace door sealing device when the furnace door is closed in the embodiment;

[0018] Figure 2 This is a diagram showing the use of the furnace door sealing device when the furnace door is open in the embodiment;

[0019] Figure 3 for Figure 1 Structural diagram at point A in the middle;

[0020] Figure 4 for Figure 3 Middle BB cross-section;

[0021] The components represented by the reference numerals in the figure are:

[0022] 1. Door leaf; 11. Blind groove; 2. Seal; 21. Sliding block; 22. Sealing plate; 23. Spring; 24. Fastener; 241. Main gear; 242. Interlocking gear. DETAILED DESCRIPTION

[0023] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0024] Example

[0025] Combine Figures 1 to 4 This embodiment provides a furnace door sealing device, including two rectangular door leaves 1 that open in opposite directions, and a sealing member 2 that is slidably provided on the door leaves 1.

[0026] In this embodiment, blind grooves 11 are provided on both the upper and lower sides of the door leaf 1. The blind grooves 11 pass through to the open side of the door leaf 1 and are arranged to be connected when the two door leaves 1 are closed.

[0027] Further preferably, the length of the blind groove 11 along the width direction of the door leaf 1 is not greater than 1 / 2 of the width of the door leaf 1 and not less than 1 / 3 of the width of the door leaf 1. This ensures that the seal 2 has sufficient sliding space on the door leaf 1 so that the door leaf 1 can be opened and closed freely, and at the same time, avoids unnecessary processes caused by the blind groove 11 being too large.

[0028] In this embodiment, the sealing member 2 includes a sliding block 21 slidably disposed in the blind groove 11 and a vertically disposed strip sealing plate 22 .

[0029] Preferably, a card slot is opened on at least one side wall of the blind groove 11 along the length direction of the blind groove 11, and one end of the sliding block 21 located in the blind groove 11 is provided with a card block that engages with the card slot to enhance structural stability and prevent the sliding block 21 from detaching from the blind groove 11.

[0030] Furthermore, a rubber sealing strip is provided on the side of the sealing plate 22 close to the door leaf 1. The rubber sealing strip includes a sealing ring arranged along the circumference of the sealing plate, which increases the sealing performance between the sealing plate 22 and the door leaf 1 and buffers the force exerted by the sealing plate 22 on the door leaf 1 at the moment of pressing.

[0031] As a preferred embodiment, the width of the sealing plate 22 along the width direction of the door leaf 1 is no greater than the length of the blind groove 11, and no less than 1 / 2 of the length of the blind groove 11. While the width of the sealing plate 22 is sufficient to cover the gap between the two door leaves 1, it ensures that the sealing plate 22 can slide to the side of either door leaf 1 when the door leaf 1 is opened, without affecting the normal opening or closing of the door leaf 1.

[0032] In this embodiment, both ends of the sealing plate 22 are connected to the sliding block 21 via fasteners 24 , and the fasteners 24 are configured to adjust the distance between the sealing plate 22 and the sliding block 21 .

[0033] Furthermore, the fastener 24 includes a fastening bolt, one end of which is rotatably connected to the sealing plate 22 and the other end of which is screwed to the sliding block 21. The fastening bolt, which is rotatably connected to the sealing plate 22, is provided with a handle that passes through the sealing plate 22. By turning the handle, the fastening bolt is rotated and advanced toward the sliding block 21. During the advancement, the sealing plate 22 can follow the fastening bolt and move toward the sliding block 21 until the sealing plate 22 is tightly abutted against the door leaf 1.

[0034] Specifically, there are two fastening bolts, and one end of each fastening bolt, which is away from the sliding block 21, is connected to the handle via a gear. The provision of two fastening bolts can ensure that the sealing plate 22 and the door leaf 1 are subjected to more uniform force when they are pressed against each other. At the same time, the handle and the fastening bolts are connected via a gear, which ensures that when the handle is turned, the two fastening bolts can rotate simultaneously.

[0035] In a specific implementation, a circular groove is provided on the side of the sealing plate 22 facing away from the door leaf 1, and the handle includes a cross bar with one end rotatably connected to the circular groove through a bearing, a main gear 241 is provided on the outer ring in the middle of the cross bar, and a linkage gear 242 is provided on the outer ring at the end of the fastening bolt facing away from the sliding block 21. By rotating the handle, the main gear 241 drives the linkage gear 242 to rotate, ensuring that the two fastening bolts rotate at the same time.

[0036] In order to prevent the sealing plate 22 from detaching from the sliding block 21 when the fastener 24 is loosened, or even the sealing plate 22 from accidentally falling off, a recess is provided on the side of the sliding block 21 close to the sealing plate 22, and a limit plate is provided at the opening of the recess. A connecting port is provided in the middle of the limit plate, and the diameter of the connecting port is smaller than the diameter of the recess opening. Both ends of the sealing plate 22 are bent toward the sliding block 21, pass through the connecting port in the middle of the limit plate, and slide into the recess through the limit block.

[0037] Preferably, the depth of the notch is set so that when the limit block and the limit plate are in contact, the fastening bolt is separated from the sliding block 21. This prevents the sealing plate 22 from accidentally falling off and ensures that when the limit block and the limit plate are in contact, the fastening bolt and the sliding block 21 are completely separated, allowing the seal 2 to slide smoothly in the groove.

[0038] As a preferred embodiment, a plurality of springs 23 are provided between the limit block and the bottom of the recess, which can not only prevent the sealing plate 22 from rocking back and forth in the recess during movement, but also cushion the impact force of the limit block on the inner wall of the recess and the limit plate.

[0039] After placing the workpiece to be heated in the furnace, close the two door panels 1, slide the seal 2 between the two door panels 1 so that the sealing plate 22 can cover the gap between the two door panels 1, and then adjust the distance between the sealing plate 22 and the sliding block 21 using the fastener 24 until the sealing plate 22 is tightly against the door panels 1. The rubber sealing strip on one side of the sealing plate 22 further seals the gap to prevent heat loss between the door panels 1. When heating in the furnace is completed, rotate the handle in the opposite direction to loosen the fastener 24. When the sealing plate 22 is separated from the door panels 1, push the sealing plate 22 in the direction of either door panel 1, open the door panels 1, and remove the workpiece.

Claims

1. A furnace door sealing device, characterized in that: It comprises two rectangular door leaves (1) of split type, and a sealing member (2) is slidably provided on the door leaves (1); Blind grooves (11) are provided on both upper and lower sides of the door leaf (1), and the blind grooves (11) extend to the opening side of the door leaf (1) and are arranged so that the two door leaves (1) are connected when they are closed; The sealing member (2) comprises a sliding block (21) slidingly arranged in the blind groove (11), and a vertically arranged strip sealing plate (22), both ends of the sealing plate (22) are connected to the sliding block (21) via fasteners (24), and the fasteners (24) are configured to be able to adjust the distance between the sealing plate and the sliding block (21).

2. A furnace door sealing device according to claim 1, characterized in that: The fastener (24) includes a fastening bolt, one end of which is rotatably connected to the sealing plate (22) and the other end of which is spirally connected to the sliding block (21); One end of the fastening bolt rotatably connected to the sealing plate (22) passes through the sealing plate (22) and is provided with a handle.

3. A furnace door sealing device according to claim 2, characterized in that: Two fastening bolts are provided, and one end of the fastening bolt away from the sliding block (21) is connected to the handle through a gear.

4. The furnace door sealing device according to claim 1, characterized in that: A notch is provided on one side of the sliding block (21) close to the sealing plate (22), and a limiting plate is provided at the opening of the notch. Both ends of the sealing plate (22) are bent toward the sliding block, pass through the limiting plate, and are slidably arranged in the notch through the limiting block.

5. A furnace door sealing device according to claim 4, characterized in that: The depth of the notch is set so that when the limiting block and the limiting plate are in contact with each other, the fastening bolt and the sliding block (21) are separated.

6. A furnace door sealing device according to claim 4, characterized in that: A plurality of springs (23) are provided between the limiting block and the bottom of the notch.

7. The furnace door sealing device according to claim 1, characterized in that: The sealing plate (22) is provided with a rubber sealing strip on one side close to the door leaf (1).

8. The furnace door sealing device according to claim 1, characterized in that: The length of the blind groove (11) along the width direction of the door leaf (1) is not greater than 1 / 2 of the width of the door leaf (1) and not less than 1 / 3 of the width of the door leaf (1).

9. The furnace door sealing device according to claim 1, characterized in that: The width of the sealing plate (22) along the width direction of the door leaf (1) is not greater than the length of the blind groove (11) and is not less than 1 / 2 of the length of the blind groove.

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