A vacuum chamber seal door

Abstract

The utility model provides a kind of vacuum chamber sealing door, including sealing cover and lifting mechanism, the front and back of sealing cover are equipped with the opening allowing material to go in and out;Two vertical sliding rails are equipped on the inner side wall of sealing cover, door frame is slidably installed on sliding rail, door body is slidably installed in door frame, limit block is equipped in sealing cover inside;Guiding hole is equipped in the side wall of door frame, guiding pin matched with guiding hole is equipped in the side wall of door body, sealing ring is equipped on the abutting surface of door body and sealing cover.The utility model determines the height position of door body by limit block, and utilizes the constraint of guiding hole, forcibly drives door body to move horizontally when door frame continues to drop, so that it is automatically pressed in the inner side of sealing cover opening, converts lifting movement directly into sealing pressing force, without additional pressing device, simplify overall structure and improve action reliability, significantly reduce the complexity of equipment, manufacturing cost and maintenance difficulty, while ensuring that sealing performance meets the stringent requirements of vacuum chamber.

Description

Technical Field

[0001] This utility model relates to the field of sealing door technology, and in particular to a vacuum chamber sealing door. Background Technology

[0002] With industrial upgrading, more and more metal materials are undergoing high-value-added heat treatment to improve product quality and seize the high-end product market. At the same time, various atmospheres that can improve product quality during heat treatment are also being used more and more.

[0003] In metal heat treatment processes, heating the workpiece in a non-oxidizing atmosphere is crucial for improving the quality of heat-treated parts. For large-scale non-oxidizing heating equipment, a protective atmosphere is typically filled to prevent workpiece oxidation. To accommodate the process requirements of complex products, vacuum chambers are installed at both ends of the heating equipment. These vacuum chambers effectively isolate the protective gas inside the equipment from the external gas. The vacuum chambers are equipped with sealing doors to prevent external air from entering the equipment or causing the atmosphere inside the equipment to leak out.

[0004] Vacuum chamber sealing doors require high sealing performance. Traditionally, in addition to the door's lifting mechanism, a clamping device is added to the outside of the vacuum chamber sealing door, using pneumatic, hydraulic, or electric methods to press the sealing door firmly against the door frame. The disadvantages of this type of device are its complex structure and high manufacturing and maintenance costs. Utility Model Content

[0005] This utility model proposes a vacuum chamber sealing door, which solves the problems in the prior art where, in order to meet the sealing requirements of the vacuum chamber, a clamping device needs to be added outside the sealing door to press the sealing door onto the door frame, resulting in complex equipment structure and high manufacturing and maintenance costs.

[0006] The technical solution of this utility model is implemented as follows: This utility model provides a vacuum chamber sealing door, including a sealing cover and a lifting mechanism. The sealing cover has openings on its front and back to allow materials to enter and exit. The inner sidewall of the sealing cover is provided with two vertical slide rails, on which a door frame is slidably mounted. A door body is slidably mounted inside the door frame. A limiting block is provided inside the sealing cover. The limiting block is configured such that when the bottom of the door body abuts against the limiting block, the height of the door body is the same as the height of the opening. A guide hole is provided on the sidewall of the door frame, and a guide pin matching the guide hole is provided on the sidewall of the door body. The guide hole is configured such that when the lifting mechanism drives the door frame to descend until the bottom of the door body abuts against the limiting block, as the door frame continues to descend, the door body moves horizontally under the constraint of the limiting block and the guide hole until it abuts against the inside of the opening of the sealing cover and seals. A sealing ring is provided on the contact surface between the door body and the sealing cover.

[0007] Optionally, the guide hole is an arc-shaped hole or an oblique hole.

[0008] Preferably, the bottom of the door is provided with rollers that cooperate with the limiting block.

[0009] Specifically, the lifting mechanism includes a drive component, a rotating shaft, a drive sprocket, a driven sprocket, and a transmission chain. The rotating shaft is rotatably mounted on the bottom or top of the sealing cover via bearings. The drive sprocket is fixedly sleeved on the outside of the rotating shaft, and the driven sprocket is mounted on the sealing cover at the end away from the drive sprocket via a bracket. One end of the transmission chain is fixedly connected to the door frame, and the other end passes through the drive sprocket and the driven sprocket in sequence before being fixedly connected to the door frame. The drive component drives the rotating shaft to rotate, thereby driving the door frame to rise and fall with the help of the drive sprocket, the driven sprocket, and the transmission chain.

[0010] Furthermore, a position sensor is provided on the outside of the sealing cover to detect whether the door frame has risen or fallen into place. The position sensor is linked with the drive component for control.

[0011] Optionally, the outer side of the sealing cover is provided with a mounting plate, and the mounting plate is provided with a first position sensor and a second position sensor; the end of the rotating shaft away from the driving component is provided with a rotating wheel, and the outer end face of the rotating wheel is provided with a marking block; the marking block is configured such that: when the door frame rises to the position, the marking block moves to the position that matches the first position sensor; when the door frame falls to the position, the marking block moves to the position that matches the second position sensor.

[0012] Optionally, the end of the rotating shaft away from the driving component is provided with a rotating wheel, and the outer end face of the rotating wheel is provided with a first marking block and a second marking block; the outer side of the sealing cover is provided with a mounting plate, and the mounting plate is provided with a position sensor; the position sensor is configured such that: when the door frame rises to the position, the first marking block moves to a position that matches the position sensor; when the door frame falls to the position, the second marking block moves to a position that matches the position sensor.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) This utility model uses an innovative mechanical linkage design to determine the height position of the door body by means of a limit block, and uses the constraint of the guide hole to force the door body to move horizontally when the door frame continues to descend, so that it automatically presses the inner side of the sealing cover opening; this linkage mechanism directly converts the lifting motion into sealing pressing force, without the need for an additional pressing device, which simplifies the overall structure and improves the reliability of the action, significantly reduces the complexity of the equipment, manufacturing cost and maintenance difficulty, while ensuring that the sealing performance meets the stringent requirements of the vacuum chamber; (2) By setting a roller at the bottom of the door body to cooperate with the limiting block, the sliding friction between the door body and the limiting block is converted into rolling friction, which effectively reduces the movement resistance and component wear, improves the smoothness of door body movement and the service life of the equipment. (3) The present invention adopts a lifting mechanism consisting of a drive component, a rotating shaft, a sprocket and a closed-loop transmission chain, with both ends of the chain fixed to the door frame; the design has smooth transmission, strong load-bearing capacity and good synchronization, ensuring the stability and accuracy of the door frame lifting process, and the structure is compact and easy to maintain; (4) This utility model sets a position sensor on the outside of the sealing cover, and determines whether the door frame is raised or lowered in place by detecting the position of the marker block on the rotating shaft, and realizes automatic control in conjunction with the drive component; this design improves the automation level and positioning accuracy of the equipment operation, and avoids the risk of sealing failure or equipment damage caused by overtravel or undertravel. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a front sectional view of a vacuum chamber sealing door according to the present invention; Figure 2 This is a schematic diagram of the internal structure of a vacuum chamber sealing door according to the present invention; Figure 3 This is a schematic diagram of the front structure of the sealing door after the sealing cover has been removed in an embodiment of this utility model; Figure 4 This is a schematic diagram of the assembly structure of the door body and the door frame in an embodiment of this utility model; Figure 5 This is a schematic diagram showing the installation positions of the position sensor and the marker block in an embodiment of this utility model; In the diagram: 1. Sealing cover; 2. Opening; 3. Slide rail; 4. Door frame; 5. Door body; 6. Limiting block; 7. Guide hole; 8. Guide pin; 9. Sealing ring; 10. Roller; 11. Shaft; 12. Drive sprocket; 13. Driven sprocket; 14. Transmission chain; 15. Bearing; 16. Bracket; 17. Mounting plate; 18. First position sensor; 19. Second position sensor; 20. Rotary wheel; 21. Marking block. Detailed Implementation

[0016] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] Reference Figures 1 to 5 This utility model provides a vacuum chamber sealing door, including a sealing cover 1 and a lifting mechanism. The sealing cover 1 has openings 2 on its front and back to allow materials to enter and exit. The inner sidewall of the sealing cover 1 is provided with two vertical slide rails 3. A door frame 4 is slidably installed on the slide rails 3. A door body 5 is slidably installed inside the door frame 4. A limiting block 6 is provided inside the sealing cover 1. The limiting block 6 is configured such that when the bottom of the door body 5 abuts against the limiting block 6, the height of the door body 5 is the same as the height of the opening 2. A guide hole 7 is provided on the sidewall of the door frame 4. A guide pin 8 matching the guide hole 7 is provided on the sidewall of the door body 5. The guide hole 7 is configured such that when the lifting mechanism drives the door frame 4 to descend until the bottom of the door body 5 abuts against the limiting block 6, as the door frame 4 continues to descend, the door body 5 moves horizontally under the constraint of the limiting block 6 and the guide hole 7 until it abuts against the inside of the opening 2 of the sealing cover 1 and seals. A sealing ring 9 is provided on the contact surface between the door body 5 and the sealing cover 1.

[0018] This utility model, through an innovative mechanical linkage design, determines the height position of the door body 5 by means of the limiting block 6, and uses the constraint of the guide hole 7 to force the door body 5 to move horizontally as the door frame 4 continues to descend, so that it automatically presses against the inside of the opening 2 of the sealing cover 1. This linkage mechanism directly converts the lifting motion into sealing pressure, eliminating the need for an additional pressing device, simplifying the overall structure and improving the reliability of the operation, significantly reducing the complexity of the equipment, manufacturing costs and maintenance difficulty, while ensuring that the sealing performance meets the stringent requirements of the vacuum chamber.

[0019] Optionally, such as Figure 4 As shown, the guide hole 7 is an arc-shaped hole or an oblique hole; in this embodiment, an arc-shaped hole is used. Using an arc-shaped hole or an oblique hole as the guide hole 7 can more accurately and smoothly guide the horizontal movement trajectory of the door 5, ensuring the fit and sealing uniformity between the door 5 and the opening 2 of the sealing cover 1, while reducing the risk of jamming during movement.

[0020] Preferably, such as Figures 1 to 4 As shown, the bottom of the door body 5 is provided with a roller 10 that cooperates with the limiting block 6. By setting the roller 10 at the bottom of the door body 5 to cooperate with the limiting block 6, the sliding friction between the door body 5 and the limiting block 6 is converted into rolling friction, which effectively reduces the movement resistance and component wear, improves the smoothness of the door body 5 movement and the service life of the equipment.

[0021] Specifically, such as Figures 1 to 3 As shown, the lifting mechanism includes a drive component (not shown), a rotating shaft 11, a drive sprocket 12, a driven sprocket 13, and a transmission chain 14. The rotating shaft 11 is rotatably mounted on the bottom or top of the sealing cover 1 via a bearing 15. The drive sprocket 12 is fixedly sleeved on the outside of the rotating shaft 11, and the driven sprocket 13 is mounted on the sealing cover 1 at the end away from the drive sprocket 12 via a bracket 16. One end of the transmission chain 14 is fixedly connected to the door frame 4, and the other end passes through the drive sprocket 12 and the driven sprocket 13 in sequence before being fixedly connected to the door frame 4. The drive component drives the rotating shaft 11 to rotate, thereby driving the door frame 4 to rise and fall with the help of the drive sprocket 12, the driven sprocket 13, and the transmission chain 14. The lifting mechanism, consisting of a drive component, a rotating shaft 11, sprockets, and a closed-loop transmission chain 14, has both ends of the chain fixed to the door frame 4. This design provides smooth transmission, strong load-bearing capacity, and good synchronization, ensuring the stability and accuracy of the door frame 4's lifting process, and its compact structure facilitates maintenance.

[0022] In this embodiment, the driving component includes a combination of a drive motor and a speed reducer.

[0023] Furthermore, a position sensor is provided on the outside of the sealing cover 1 to detect whether the door frame 4 has risen or fallen into place. The position sensor is linked with the drive component for control.

[0024] In this embodiment, as Figure 2 , 3 As shown in Figure 5, the outer side of the sealing cover 1 is provided with a mounting plate 17, and the mounting plate 17 is provided with a first position sensor 18 and a second position sensor 19; the end of the rotating shaft 11 away from the driving component is provided with a rotating wheel 20 (in this embodiment, it is two meshing gears, but in specific implementation, it is not limited to using gears), and the outer end face of the rotating wheel 20 is provided with a marking block 21; the marking block 21 is configured such that when the door frame 4 rises to the position, the marking block 21 moves to the position that matches the first position sensor 18; when the door frame 4 falls to the position, the marking block 21 moves to the position that matches the second position sensor 19.

[0025] Optionally, the end of the rotating shaft 11 away from the driving component is provided with a rotating wheel 20, and the outer end face of the rotating wheel 20 is provided with a first marking block and a second marking block; the outer side of the sealing cover 1 is provided with a mounting plate 17, and the mounting plate 17 is provided with a position sensor; the position sensor is configured such that when the door frame 4 rises to the position, the first marking block moves to a position that matches the position sensor; when the door frame 4 falls to the position, the second marking block moves to a position that matches the position sensor.

[0026] Optionally, the position sensor can be a contact sensor (such as a piezoelectric sensor) or a non-contact sensor (such as a photoelectric sensor). In this embodiment, a photoelectric sensor is selected as the position sensor, and the corresponding marker block 21 can be a screw (a screw hole is opened on the end face of the rotating wheel 20 to fix the screw). The specific type of sensor can be flexibly selected according to the actual situation.

[0027] This invention uses a position sensor installed on the outside of the sealing cover 1 to detect the position of the marker block 21 on the rotating shaft 11 to determine whether the door frame 4 has been raised or lowered in place (the number of position sensors and marker blocks 21 can be flexibly adjusted according to the actual situation), and is linked with the drive component to achieve automatic control. This design improves the automation level and positioning accuracy of the equipment operation and avoids the risk of sealing failure or equipment damage caused by overtravel or undertravel.

[0028] This utility model drives the vertical movement of the door frame 4 through a lifting mechanism. Combined with the synergistic effect of the limiting block 6 and the guide hole 7-guide pin 8, the vertical movement is converted into the horizontal movement of the door body 5 at the end of the descent of the door frame 4, so that the door body 5 automatically presses against the opening 2 of the sealing cover 1 to achieve a seal. No independent pressing device is required throughout the process, the structure is simplified and the seal is reliable.

[0029] The working process of the sealing door in this embodiment is as follows: 1) Open state (door 5 raised) The drive unit drives the rotating shaft 11 to rotate clockwise, and the drive sprocket 12 rotates with the rotating shaft 11. The transmission chain 14 (fixed at both ends to the door frame 4) passes around the drive sprocket 12 and the driven sprocket 13, pulling the door frame 4 up along the vertical slide rail 3 of the sealing cover 1. In the initial stage of the door frame 4 rising, the door body 5 retracts horizontally into the door frame 4 in the direction away from the opening 2 of the sealing cover 1 through the guide pin 8 engaging with the guide hole 7 of the door frame 4, until the guide pin 8 slides to the bottom end of the guide hole 7. Then the door body 5 begins to move upward synchronously with the door frame 4, disengaging from the opening 2 of the sealing cover 1. When the door frame 4 rises to the highest position, the marker block 21 at the end of the rotating shaft 11 triggers the first position sensor 18; the sensor sends a signal to the controller, and the controller controls the drive unit to stop rotating. At this time, the door body 5 is fully opened (opening 2 is exposed). 2) Close the seal (door 5 descends and presses down) The drive component drives the rotating shaft 11 to rotate in reverse, which in turn drives the drive sprocket 12 to rotate in the opposite direction. The chain pulls the door frame 4 down along the slide rail 3. When the door frame 4 descends to the point where the bottom roller 10 of the door body 5 contacts the limiting block 6 inside the sealing cover 1, the height of the door body 5 is aligned with the opening 2 (at this time, it is not yet sealed). As the door frame 4 continues to descend, the door body 5 cannot move down because it is blocked by the limiting block 6 at the bottom. The guide hole 7 (arc / oblique hole) of the door frame 4 forces the guide pin 8 of the door body 5 to slide along the trajectory of the guide hole 7. The guide pin 8 is constrained by the guide hole 7 and pushes the door body 5 to extend horizontally towards the opening 2 of the sealing cover 1. When the door frame 4 descends to the lowest position, the marker block 21 at the end of the rotating shaft 11 triggers the second position sensor 19. The sensor sends a signal to the controller, and the controller controls the drive component to stop rotating. At this time, the door body 5 is tightly pressed against the inside of the opening 2 of the sealing cover 1. The sealing ring 9 of the contact surface between the door body 5 and the sealing cover 1 is deformed by pressure, forming an airtight barrier.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vacuum chamber sealing door, characterized in that, Includes a sealing cover (1) and a lifting mechanism. The sealing cover (1) has openings (2) on its front and back to allow materials to enter and exit. The inner wall of the sealing cover (1) is provided with two vertical slide rails (3). A door frame (4) is slidably installed on the slide rails (3). A door body (5) is slidably installed inside the door frame (4). A limiting block (6) is provided inside the sealing cover (1). The limiting block (6) is configured such that when the bottom of the door body (5) abuts against the limiting block (6), the height of the door body (5) is the same as the height of the opening (2). 4) has a guide hole (7) on its side wall, and the side wall of the door body (5) is provided with a guide pin (8) that matches the guide hole (7); the guide hole (7) is configured such that when the lifting mechanism drives the door frame (4) to descend to the bottom of the door body (5) and abut against the limiting block (6), as the door frame (4) continues to descend, the door body (5) moves horizontally under the constraint of the limiting block (6) and the guide hole (7) to abut against and seal against the inside of the opening (2) of the sealing cover (1), and a sealing ring (9) is provided on the abutment surface of the door body (5) and the sealing cover (1).

2. A vacuum chamber sealing door as described in claim 1, characterized in that, The guide hole (7) is an arc-shaped hole or an oblique hole.

3. A vacuum chamber sealing door as described in claim 1, characterized in that, The bottom of the door (5) is provided with a roller (10) that cooperates with the limiting block (6).

4. A vacuum chamber sealing door as described in claim 1, characterized in that, The lifting mechanism includes a drive component, a rotating shaft (11), a drive sprocket (12), a driven sprocket (13), and a transmission chain (14). The rotating shaft (11) is rotatably mounted on the bottom or top of the sealing cover (1) via a bearing (15). The drive sprocket (12) is fixedly sleeved on the outside of the rotating shaft (11). The driven sprocket (13) is mounted on the sealing cover (1) at one end away from the drive sprocket (12) via a bracket (16). One end of the transmission chain (14) is fixedly connected to the door frame (4), and the other end passes around the drive sprocket (12) and the driven sprocket (13) in sequence before being fixedly connected to the door frame (4). The drive component drives the rotating shaft (11) to rotate, and drives the door frame (4) to rise and fall with the help of the drive sprocket (12), the driven sprocket (13), and the transmission chain (14).

5. A vacuum chamber sealing door as described in claim 4, characterized in that, A position sensor is provided on the outside of the sealing cover (1) to detect whether the door frame (4) has risen or fallen into place. The position sensor is linked with the drive component for control.

6. A vacuum chamber sealing door as described in claim 5, characterized in that, The outer side of the sealing cover (1) is provided with a mounting plate (17), and the mounting plate (17) is provided with a first position sensor (18) and a second position sensor (19); the end of the rotating shaft (11) away from the driving component is provided with a rotating wheel (20), and the outer end face of the rotating wheel (20) is provided with a marking block (21); the marking block (21) is configured such that when the door frame (4) rises to the position, the marking block (21) moves to the position that matches the first position sensor (18); when the door frame (4) falls to the position, the marking block (21) moves to the position that matches the second position sensor (19).

7. A vacuum chamber sealing door as described in claim 5, characterized in that, The rotating shaft (11) has a rotating wheel (20) at one end away from the driving component. The outer end face of the rotating wheel (20) has a first marking block and a second marking block. The outer side of the sealing cover (1) has a mounting plate (17) with a position sensor. The position sensor is configured such that when the door frame (4) rises to the position, the first marking block moves to a position that matches the position sensor. When the door frame (4) falls to the position, the second marking block moves to a position that matches the position sensor.

Images