Furnace door locking device

Abstract

The application discloses a furnace door locking device, which comprises a furnace body and a furnace door and comprises the following: chains, which are arranged on the left and right sides of the furnace door respectively and drive the furnace door to lift; guide rails, which are arranged on the left and right sides of the furnace body respectively; guide plates, one end of each of which is arranged on the furnace door, and the other end of each of which is slidably matched in the guide rail; hinged seats, which are arranged on the left and right sides of the furnace door respectively, and one end of each of the guide plates is hinged on the hinged seat; limiting plates, which are arranged in the guide rail, and when the furnace door is lifted, the other end of each of the guide plates is slidably matched in the guide rail; when the bottom of the other end of each of the guide plates abuts against the limiting plate, the hinged seat rotates with the guide plate, so that the furnace door is pressed on the furnace body, and the furnace door locking device has simple structure and low cost.

Description

Technical Field

[0001] This invention relates to the field of industrial furnace equipment technology, and in particular to a furnace door locking device. Background Technology

[0002] Industrial furnace door sealing, especially hinged furnace doors, often relies on manual opening and closing, with handwheels used for sealing. This method, dependent on manual operation, is cumbersome, operates in harsh environments, and is highly susceptible to human error, making it unsuitable for today's highly automated processes. Existing technology offers a pneumatic furnace door locking device. A locking cylinder, mounted on one side of the furnace door via a fixed axle, has locking wheels and locking pins at both ends. When the cylinder extends, the locking wheels are pushed into a wedge-shaped frame mounted on the furnace body, locking the door. The locking pin is then pushed into a wedge-shaped plate on the other side of the furnace door, pressing the two doors together for a seal. A spring at one end of the cylinder keeps the cylinder in a relatively constant position during extension and retraction. This achieves automatic opening and closing and automatic sealing of the furnace door. However, this method is complex, requires separate left and right furnace doors, and is costly. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a furnace door locking device with simple structure and low cost.

[0004] To achieve the above objectives, the technical solution of the present invention is: a furnace door locking device, comprising a furnace body and a furnace door, comprising:

[0005] Chains are respectively installed on the left and right sides of the furnace door, and the chains drive the furnace door to rise and fall;

[0006] The guide rails are located on the left and right sides of the furnace body, respectively.

[0007] A guide plate, one end of which is mounted on the furnace door, and the other end of which slides up and down within a guide rail.

[0008] Hinges are respectively located on the left and right sides of the furnace door, and one end of the guide plate is hinged to the hinge.

[0009] The limiting plate is located inside the guide rail. When the furnace door is raised or lowered, the other end of the guide plate slides up and down in the guide rail. When the bottom of the other end of the guide plate abuts against the limiting plate, the hinge seat rotates with the guide plate, causing the furnace door to press against the furnace body.

[0010] With the above structure, the present invention has the following advantages compared with the prior art: Chains are provided on both the left and right sides of the furnace door, and the up-and-down movement of the chains drives the furnace door to rise and fall, thus opening or closing the furnace body. The structure is simple and the cost is low. Simultaneously, a guide plate is provided on the furnace door, slidingly fitted within the guide rail to ensure that the furnace door only rises and falls, ensuring high reliability. Furthermore, a limiting plate is provided within the guide rail. One end of the guide plate slides within the guide rail, and the other end is hinged to the furnace door. When one end of the guide plate touches the limiting plate, that end stops moving downwards, while the other end swings downwards due to the weight of the furnace door, causing the furnace door to press tightly against the furnace body, ensuring that the furnace door can seal the furnace body.

[0011] Preferably, it also includes a support frame on which a winch is mounted. The winch is connected to the upper end of a chain on the right side of the furnace door. The winch drives the furnace door to rise and fall via the chain, resulting in a simple structure.

[0012] Preferably, it also includes a fixed pulley and a counterweight. The fixed pulley is located on the left side of the bracket, and the upper end of the chain on the left side of the furnace door passes around the fixed pulley and connects to the counterweight, so that the chains on the left and right sides of the furnace door can move up and down synchronously, and the furnace door can be raised and lowered smoothly with high reliability.

[0013] Preferably, a guide seat is provided on the left side of the furnace body, and the counterweight is slidably fitted into the guide seat to ensure that the counterweight can only move up and down.

[0014] Preferably, the bottom surface of the hinge seat is provided with a first opening groove facing downwards, and a hinge shaft is provided in the first opening groove. One end of the guide plate is provided on the hinge shaft to ensure that the furnace door rotates downwards and presses against the furnace body when the furnace door is lowered.

[0015] Preferably, the upper surface of the hinge seat is provided with a second opening groove that communicates vertically with the first opening groove. The second opening groove penetrates the rear side of the hinge seat, which allows the furnace door to rotate at a larger angle and the furnace door to be pressed more firmly against the furnace body.

[0016] Preferably, one end of the guide plate extends out of the front side of the hinge seat, and the lower end of each chain is fixed to one end of the guide plate to reduce the rotation speed of the furnace door and prevent large collisions between the furnace door and the furnace body.

[0017] Preferably, there are four hinge seats, with each guide plate corresponding to one of the hinge seats. Two hinge seats are located on the left side of the furnace door, and the other two are located on the right side of the furnace door. The hinge seats are arranged in a rectangular shape, and the lower end of the chain is fixed to the upper hinge seat to ensure good stability of the furnace door lifting.

[0018] Preferably, it also includes a connecting rod for connecting the guide plate on the same side of the furnace door, wherein the two ends of the connecting rod are respectively hinged to the guide plate, so that the chain can pull the guide plate on the same side at the same time, which has high reliability. Attached Figure Description

[0019] Figure 1 This is a front view of the furnace door locking device of the present invention.

[0020] Figure 2 yes Figure 1 An enlarged diagram of A in the diagram.

[0021] Figure 3 This is a front view of the furnace door locking device of the present invention with the furnace door and chain removed.

[0022] Figure 4 This is a front view of the furnace door of the furnace door locking device of the present invention.

[0023] Figure 5 This is a top view of the furnace door locking device fixing seat and hinge seat of the present invention.

[0024] Figure 6 This is a top view of the furnace door locking device of the present invention, showing the cooperation between the fixing seat, hinge seat, guide plate and guide rail.

[0025] Figure 7 This is a rear view of the guide rail of the furnace door locking device of the present invention.

[0026] Figure 8 This is a front view of the guide plate and hinge seat of the furnace door locking device of the present invention when the guide plate and the limiting plate are not in contact.

[0027] Figure 9 This is a front view of the guide plate and hinge seat when the guide plate of the furnace door locking device of the present invention is in contact with the limiting plate.

[0028] Among them, 1. Furnace body, 2. Furnace door, 3. Chain, 4. Guide rail, 5. Guide plate, 6. Hinge seat, 7. Limiting plate, 8. Bracket, 9. Fixed pulley, 10. Counterweight, 11. Guide seat, 12. First opening slot, 13. Hinge shaft, 14. Second opening slot, 15. Connecting rod, 16. Furnace opening, 17. Spacing, 18. Guide block, 19. Connecting plate, 20. Track, 21. Fixed seat, 210. Upper plate, 211. Lower plate, 212. First side plate, 213. Second side plate. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1 , 2As shown in Figure 3, the present invention provides a furnace door locking device, including a furnace body 1, a furnace opening 16 on the front side of the furnace body 1, a furnace door 2 located at the furnace opening 16, and chains 3 on both the left and right sides of the furnace door 2. The chains 3 are used to drive the furnace door 2 to rise and fall, so the furnace door 2 does not need to be divided into a left furnace door and a right furnace door, thus reducing costs. In order to ensure the vertical movement of the furnace door 2, guide rails 4 are provided on both the left and right sides of the furnace body 1, and guide plates 5 are provided on both the left and right sides of the furnace door 2. The front end of the guide plate 5 is fixed to the furnace door 2, and the rear end of the guide plate 5 is fixed to the furnace door 2. The furnace door 2 is slidably fitted within the guide rail 4. To ensure that the furnace door 1 is pressed tightly against the furnace opening 16, a hinge seat 6 is provided on the furnace door 2, and the front end of the guide plate 5 is hinged to the hinge seat 6. At the same time, a limiting plate 7 is provided inside the guide rail 4. When the furnace door 2 descends, the guide plate 5 also descends. When the rear end of the guide plate 5 touches the limiting plate 7, the furnace door 2 is located at the furnace opening 16. Due to the weight of the furnace door 2, the front end of the guide plate 5 will rotate downward with the rear end of the guide plate 5 as the fulcrum, so that the furnace door 2 is pressed tightly against the furnace opening 16. Limiting plates 7 are located inside the guide rails 4 on both the left and right sides of the furnace body 1, and the limiting plates 7 are located inside the lower end of the guide rail 4.

[0031] As one embodiment, a support 8 is installed on the ground. In order to facilitate the up and down movement of the chain 3, a winch is installed on the upper surface of the right end of the support 8. The winch is located above the furnace body 1. The winch drives the chain 3 on the right side of the furnace door 2 to rise and fall, thereby realizing the raising and lowering of the furnace door 2.

[0032] As one example, such as Figure 1 and 3 To facilitate the synchronous movement of the chains 3 on both sides of the furnace door 2, a counterweight 10 is connected to the upper end of the chain 3 on the left side of the furnace door 2. A pulley 9 is also installed on the left side of the support 8, with the pulley 9 positioned above the furnace body 1. The chain 3 winds half a turn around the pulley 9. The chain 3 and the counterweight 10 are located on the left and right sides of the pulley 9, respectively. When the furnace door 2 rises, the counterweight 10 makes it easier for the furnace door 2 to rise; when the furnace door 2 descends, the counterweight 10 reduces the speed of descent. Specifically, to ensure that the counterweight 10 only moves up and down, a guide seat 11 is provided on the left side of the furnace body 1, and the counterweight 10 slides and engages within the guide seat 11. Specifically, the guide seat 11 is a U-shaped steel bar standing upright on the ground. Specifically, to prevent the counterweight 10 from pulling the furnace door 2 off-center, the opening of the U-shaped steel bar faces the furnace door 2.

[0033] As one example, such as Figure 2 , 4To facilitate the hinge connection between the guide plate 5 and the hinge seat 6, a first opening groove 12 with an opening facing downwards is provided on the bottom surface of the hinge seat 6. A hinge shaft 13 is provided in the first opening groove 12. The front end of the guide plate 5 extends into the first opening groove 12 and is mounted on the hinge shaft 13, so that the furnace door 2 can swing with the guide plate 5. Specifically, in order to make the furnace door 2 rotate at a large angle, so that the furnace door 2 is more easily pressed against the furnace seat 6, a second opening groove 14 is provided on the upper surface of the hinge seat 6. The second opening groove 14 is vertically connected to the first opening groove 12 and penetrates the rear side of the hinge seat 6.

[0034] As one example, such as Figure 1 , 3 There are four hinge seats 6, each corresponding to a guide plate 5. Two hinge seats 6 are located on the left side of the furnace door 2, and the other two are located on the right side. The hinge seats 6 on the same side of the furnace door 2 are vertically aligned. These four hinge seats 6 are arranged in a rectangular pattern, allowing the guide plate 5 to smoothly raise and lower the furnace door 2. Specifically, to reduce the rotation speed of the furnace door 2, a chain 3 is used to hold the front end of the guide plate 5, which extends out from the front of the hinge seats 6. The lower end of the chain 3 on the left side is hinged to the front end of the guide plate 5 located on the upper left side of the furnace door 2, and the lower end of the chain 3 on the right side is hinged to the front end of the guide plate 5 located on the upper right side of the furnace door 2. The limiting plate 7 is located inside the lower end of the guide rail 4, so that the guide plate 5 located at the lower end of the furnace door 2 will contact the limiting plate 7. Therefore, the guide plates 5 on the same side of the furnace door 2 need to be connected. Specifically, this also includes a connecting rod 15, with its upper and lower ends hinged to the front ends of the guide plates 5 respectively. Only the two guide plates 5 located at the lower end of the furnace door 2 will contact the limiting plate 7, that is to say, the limiting plate 7 corresponds one-to-one with the guide plates 5 located at the lower end of the furnace door 2.

[0035] As one example, such as Figure 6 The guide rail 4 includes two C-shaped steel sections, which stand upright on the ground and are positioned opposite each other with a gap of 17 between them. A guide block 18 is located at the rear end of the guide plate 5. The width of the guide plate 5 is less than the length of the guide block 18. The guide plate 5 slides vertically within the gap 17, and the guide block 18 slides vertically within the guide rail 4. Because the width of the gap 17 is less than the length of the guide rail 4, the guide block 18 will not detach from the guide rail 4, ensuring high reliability. Specifically, as shown... Figure 7 To make the guide rail 4 more stable, multiple connecting plates 19 are provided on the rear side of the guide rail 4, which connect the two C-shaped steel sections together. Specifically, to ensure that the front end of the guide plate 5 can rotate around the rear end of the guide plate 5, the width of the guide block 18 is smaller than the width of the C-shaped steel section. This allows the guide block 18 to rotate within the guide rail 4 and swing left and right within the guide rail 4. As a result, the furnace door 2 swings slightly during its ascent and descent. The furnace door 2 can self-adjust during its lifting and lowering process, facilitating the lifting and lowering of the furnace door 2 and ensuring high reliability.

[0036] As one example, such as Figure 3 A track 20 is provided on the front side of the furnace body 1. When the furnace door 2 is pressed against the furnace opening 16, the furnace door 2 abuts against the track 2, which supports the furnace door 2. At the same time, the track 20 facilitates the feeding of workpieces into the furnace body 1 for annealing and other processes.

[0037] As one embodiment, a proximity switch is provided at the position of the guide rail 4 corresponding to the limit plate 7. When the guide plate 5 located at the lower right end of the furnace door 2 abuts against the limit plate 7, the winch stops working. In this way, the guide plate 5 is rotated by the weight of the furnace door 2, thereby pressing the furnace opening 16.

[0038] As one example, such as Figure 4 and 5 It also includes a fixing seat 21, which includes an upper plate 210, a lower plate 211, a first side plate 212, and a second side plate 213. The upper end of the first side plate 212 is connected to one side of the upper plate 210, and the lower end of the first side plate 212 is connected to one side of the lower plate 211. The upper end of the second side plate 213 is connected to the other side of the upper plate 210, and the lower end of the second side plate 213 is connected to the other side of the lower plate 210. The first side plate 212 is fixed to the furnace door 2 to fix the fixing seat 21 to the furnace door 2. The hinge seat 6 is fixed to the second side plate 213, which facilitates the connection between the hinge seat 6 and the furnace door 2, and also facilitates the setting of the hinge shaft 13. The hinge shaft 13 extends within the space enclosed by the upper plate 210, the lower plate 211, the first side plate 212, and the second side plate 213, which facilitates the rotation of the hinge shaft 13. Specifically, both the upper plate 210 and the lower plate 211 are right-angled trapezoidal plates, and the projection of the fixing base 21 on the horizontal plane is a right-angled trapezoid, which is lightweight and has a strong load-bearing capacity. The first side plate 212 is the part of the lower base of the trapezoid corresponding to the fixing base 21.

[0039] Specifically, the principle of this invention is to install chains 3 on both the left and right sides of the furnace door 2. The up-and-down movement of the chains 3 drives the furnace door 2 to rise and fall, thereby opening or closing the furnace body 1. The structure is simple and the cost is low. At the same time, a guide plate 5 is installed on the furnace door 2. The guide plate 5 slides and fits in the guide rail 4 to ensure that the furnace door 2 only rises and falls, which is highly reliable. A limiting plate 7 is installed in the guide rail 4. One end of the guide plate 5 slides and fits in the guide rail 4, and the other end of the guide plate 5 is hinged to the furnace door 2. When one end of the guide plate 5 touches the limiting plate 7, one end of the guide plate 5 stops moving downward, and the other end of the guide plate 5 swings downward due to the weight of the furnace door 2, so that the furnace door 2 is pressed tightly against the furnace body 1, ensuring that the furnace door 2 can seal the furnace body 1.

[0040] Operation Process: 1. When opening furnace door 2, the motor is started first, and the winch operates. The winch drives the chain 3 on the right side of furnace door 2 upward. The rear end of the guide plate 18 slides upward and engages with the guide rail 4. At the same time, the mounting block 10 slides downward and engages with the guide seat 11, driving the chain 3 on the left side of furnace door 2 upward, thus raising furnace door 2. 2. When furnace door 2 is completely separated from furnace opening 16, the motor stops, the winch stops working, and the workpiece can be sent into furnace body 1 for processing via track 20. 3. The motor starts and reverses, and the winch drives the chain 3 on the right side of furnace door 2 downward. Due to its own weight, furnace door 2 moves downward. The furnace door 2 descends, and simultaneously the rear end of the guide plate 18 slides downward and engages with the guide rail 4. Fourth, when the rear end of the guide plate 18 at the lower end of the furnace door 2 touches the limit plate 7, the motor stops. At this time, the furnace door 2 covers the furnace opening 16. Due to the weight of the furnace door 2, the furnace door 2 drives the front end of the guide plate 18 to rotate downward around the guide plate 18, pressing the lower end of the furnace door 2 against the furnace opening 16. Simultaneously, since the lower guide plate 18 is hinged to the upper guide plate 18 via the connecting rod 15, the downward rotation of the lower end of the furnace door 2 also drives the upper end of the furnace door 2 to rotate downward, thus pressing the upper end of the furnace door 2 against the furnace opening 16, achieving the pressing of the furnace body 1. Figure 9 5. When the furnace door 2 is pressed into place, the bottom surface of the furnace door 2 just abuts against the upper surface of the track 20. When the furnace door 2 rises, the guide plate 5 at the lower end of the furnace door 2 disengages from the limiting plate 7, and the furnace door 2 drives the front end of the guide plate 5 at the lower end of the furnace door 2 to rotate around the rear end of the guide plate 5, so that the guide plate 5 at the lower end of the furnace door 2 remains horizontal, and at the same time, it also keeps the guide plate 5 at the upper end of the furnace door 2 horizontal, as... Figure 8 .

[0041] Based on the above solutions, if various modifications or variations to the present invention do not depart from the spirit and scope of the present invention, and if such modifications and variations fall within the scope of the claims and equivalent technologies of the present invention, then the present invention also intends to include such modifications and variations.

Claims

1. A furnace door locking device, comprising a furnace body (1) and a furnace door (2), characterized in that: It includes: Chains (3) are respectively located on the left and right sides of the furnace door (2), and the chains (3) drive the furnace door (2) to rise and fall; Guide rails (4) are located on the left and right sides of the furnace body (1); Guide plate (5), one end of the guide plate (5) is set on the furnace door (2), and the other end of the guide plate (5) slides up and down in the guide rail (4); Hinge seat (6), respectively set on the left and right sides of the furnace door (2), and one end of the guide plate (5) is hinged to the hinge seat (6). The limiting plate (7) is located inside the guide rail (4). When the furnace door (2) is raised or lowered, the other end of the guide plate (5) slides up and down in the guide rail (4). When the bottom of the other end of the guide plate (5) abuts against the limiting plate (7), the hinge seat (6) rotates with the guide plate (5) to press the furnace door (2) against the furnace body (1); the guide rail (4) includes two C-shaped steels, which stand upright on the ground. The two C-shaped steels are arranged opposite each other and there is a gap (17) between the two C-shaped steels. The rear end of the guide plate (5) is provided with a guide block (18). The width of the guide plate (5) is less than the length of the guide block (18). The guide plate (5) slides up and down within the gap (17). The guide block (18) slides up and down within the guide rail (4). The width of the guide block (18) is less than the width of the C-shaped steel. The guide block (18) rotates within the guide rail (4).

2. The furnace door locking device according to claim 1, characterized in that: It also includes a support (8) on which a winch is provided. The winch is connected to the upper end of the chain (3) on the right side of the furnace door (2). The winch drives the furnace door (2) to rise and fall through the chain (3).

3. The furnace door locking device according to claim 2, characterized in that: It also includes a fixed pulley (9) and a counterweight (10). The fixed pulley (9) is located on the left side of the bracket (8), and the upper end of the chain (3) on the left side of the furnace door (2) passes around the fixed pulley (9) and connects to the counterweight (10).

4. The furnace door locking device according to claim 3, characterized in that: The furnace body (1) is also provided with a guide seat (11) on the left side, and the counterweight (10) slides up and down in the guide seat (11).

5. The furnace door locking device according to claim 1, characterized in that: The bottom surface of the hinge seat (6) is provided with a first opening groove (12) with the opening facing downward. The first opening groove (12) is provided with a hinge shaft (13). One end of the guide plate (5) is provided on the hinge shaft (13).

6. The furnace door locking device according to claim 5, characterized in that: The upper surface of the hinge seat (6) is provided with a second opening groove (14) that communicates vertically with the first opening groove (12), and the second opening groove (14) penetrates the rear side of the hinge seat (6).

7. The furnace door locking device according to claim 1, characterized in that: The end of the guide plate (5) extends out of the front side of the hinge seat (6), and the lower end of the chain (3) is fixed to the end of the guide plate (5).

8. The furnace door locking device according to claim 7, characterized in that: There are four hinge seats (6). The guide plate (5) corresponds to the hinge seats (6) one by one. Two hinge seats (6) are located on the left side of the furnace door (2), and the other two hinge seats (6) are located on the right side of the furnace door (2). The hinge seats (6) are arranged in a rectangular shape. The lower end of the chain (3) is fixed on the upper hinge seat (6).

9. The furnace door locking device according to claim 8, characterized in that: It also includes a connecting rod (15) for connecting the guide plate (5) on the same side of the furnace door (2), the two ends of which are hinged to the guide plate (5).

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