Sealing door and its sealing box

Abstract

The utility model discloses a sealed door and sealed box thereof, sealed door, this sealed door includes: door frame subassembly, gas seal subassembly, door body, parallel shift subassembly, when parallel shift subassembly drive door body to drop to door frame subassembly, the rim of door body and door frame subassembly are inlaid, and the gap between door body and door frame subassembly is filled after filling by gas seal subassembly, and the sealing between sealed door and preset box is completed, the sealed box includes above-mentioned sealed door, and this sealed door adopts double protection design, and mechanical and air bag seal are combined, and air bag fills to form the annular sealing band of no breakpoint, and is suitable for many severe scenes. Air bag can directional convex fill the gap, and the door body design ensures that contact is even, and still is stable under temperature change vibration. The door body is driven by bilateral rodless air cylinder symmetry, and the clearance error is eliminated through magnetic coupling transmission, and movement is stable, and the sealing accurate inlaid is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment technology, and in particular to a sealing door and its sealing box. Background Technology

[0002] Currently, most traditional sealed boxes on the market use mechanical locking sealing structures for their doors. The main principle of this sealing method is to use the physical locking action of mechanical parts such as bolts, buckles, and handles to forcefully press the door panel against the pre-set box body. This causes the silicone, fluororubber, or other elastic sealing gaskets between the door panel and the pre-set box body to deform uniformly, thereby filling the tiny gaps between them and ultimately achieving a sealing effect that prevents the exchange of gases between the inside and outside of the box. From a sealing performance perspective, traditional mechanical locking sealing doors, when properly designed and operated, can indeed meet the basic sealing performance requirements of sealing boxes and have been the mainstream choice in the industry for a considerable period. However, with the continuous expansion of the application scenarios for sealing boxes, whether it's frequent sample changes in laboratories or efficient component maintenance on industrial production lines, the inherent defects of this sealing method have gradually become apparent. The core issue lies in the cumbersome and complex opening and closing operation. To ensure reliable sealing and prevent leaks caused by uneven deformation of the gasket due to insufficient local pressure, traditional mechanical locking sealing doors typically have multiple locking points evenly distributed around the perimeter of the door panel. The number of these locking points ranges from 4-6 to 8-12, depending on the door panel size, the material properties of the gasket, and the sealing rating requirements of the sealing enclosure. For larger industrial-grade sealing enclosures, due to the larger door panel area, the number of locking points often needs to be increased to more than 10 to ensure uniform pressure around the perimeter. Each time the sealed door is opened or closed, the operator must operate each of these locking points one by one. When closing, each bolt or clip must be tightened in a specific order to ensure even force on the door panel and avoid damage to the gasket or deformation of the door panel due to excessive local pressure. When opening, the operation must be reversed, loosening all locking points one by one. This process is not only time-consuming, especially in scenarios where the door needs to be opened and closed frequently, but the accumulated time cost will significantly reduce the efficiency of experiments or production. At the same time, the repetitive mechanical operation requires a high level of operator proficiency. If the operation sequence is incorrect or the force is not evenly controlled, it may not only affect the sealing effect, but may also cause hand fatigue due to long-term operation, increasing the risk of misoperation. Furthermore, with increased use, the mechanical components of multiple locking points are prone to wear or loosening, further complicating operation. Some worn locking points may require greater force to tighten, or even become "jammed," necessitating additional maintenance time. In severe cases, this can prevent the sealing door from opening and closing properly, affecting the overall use of the sealing box. Utility Model Content To address the aforementioned technical problems, one technical solution adopted by this utility model is a sealed door, which includes: Door frame assembly 1 is fixedly installed at the opening of the preset box; Gas sealing assembly 2, which is installed circumferentially on the door frame assembly 1; Door 3; Parallel moving components 4 are installed on both sides of the door frame assembly 1; the door body 3 is fixedly installed on the parallel moving components 4; When the parallel moving component 4 moves the door body 3 down to the door frame component 1, the edge of the door body fits into the door frame component 1. The gap between the door body and the door frame component 1 is filled by the gas sealing component 2 after being inflated, thus completing the sealing between the sealed door and the preset box.

[0003] Furthermore, the door frame assembly 1 includes: The door frame 101 is fixedly installed inside the four sides of the opening of the preset box; Gas sealing assembly mounting body 102 is fixed inside the door frame body 101; The mounting groove 103 is located on the side of the gas sealing assembly mounting body 102 facing the preset housing; The gas sealing component mounting body 102 and the airbag mounting ring groove 103 provide mounting carriers for the gas sealing component 2.

[0004] Furthermore, the gas sealing assembly 2 includes: Airbag 201, which is located within mounting ring groove 103; The air vent 202 is fixedly installed on the airbag 201 and extends out of the upper surface of the door frame 101 into the preset box.

[0005] Furthermore, the parallel movement component 4 includes: At least four mounting ribs 401 are fixedly mounted on mutually parallel vertical beams of the pre-set box, and every two mounting ribs 401 are located on one vertical beam; At least two rodless cylinder mechanisms 402 are located between two mounting ribs 401 on the corresponding vertical beam; At least one set of mounting plates 403, one end of each mounting plate 403 is mounted on the corresponding rodless cylinder mechanism 402, and the other end of each mounting plate 403 is mounted on the door body 3; The door body 3 is moved up and down by the rodless cylinder mechanism 402 to open and close the sealed door.

[0006] Furthermore, the rodless cylinder mechanism 402 includes: Hollow cylindrical guide rod 4021; Two guide rod end caps 4022 are located at both ends of the hollow cylindrical guide rod 4021; Two air ports 4023 are located on the corresponding guide rod end caps 4022; Connecting rod 4024; Multiple inner magnetic rings 4025 and magnetic ring spacer inner rings 4026 are spaced together and mounted on the connecting rod 4024. At least two inner wear-resistant rings 4027, at least two piston O-rings 4028, and two pistons 4029 are provided, wherein the inner wear-resistant rings 4027, piston O-rings 4028, and pistons 4029 are installed sequentially from the center to both sides on the axial direction of the connecting rod 4024. Multiple outer magnetic rings 40210 and magnetic ring spacer outer rings 40211 are spaced together and fitted onto a hollow cylindrical guide rod 4021. Slider 40212 is fitted around the hollow cylindrical guide rod 4021; At least two outer wear-resistant rings 40213 are installed between the hollow cylindrical guide rod 4021 and the slider 40212, and are respectively located next to the outermost magnetic ring spacer ring 40211; Two slider end caps 40214 are press-fitted onto the corresponding outer wear-resistant rings 40213; At least two oil scraper rings 40215 are located in the grooves of the corresponding slider end caps 40214; Two retaining rings 40216 are respectively installed on the corresponding slider end caps 40214 to press the slider end caps 40214.

[0007] Furthermore, each guide rod end cap 4022 is mounted on the corresponding mounting rib 401 at both ends.

[0008] Furthermore, the rodless cylinder mechanism 402 also includes an anti-collision component 40217, which is located between the guide rod end cap 4022 and the corresponding piston 4029; When the piston 4029 moves into the guide rod end cap 4022, the anti-collision component 40217 slows down the piston 4029 and slowly enters the groove, thus preventing hard contact between the piston 4029 and the edge of the guide rod end cap 4022.

[0009] Furthermore, the anti-collision component 40217 includes: At least two buffer O-rings 402171 are respectively installed in the grooves on the inner end face of the guide rod end cap 4022. When the piston 4029 moves into the groove of the guide rod end cap 4022, the piston 4029 decelerates and slowly enters the groove. At least two anti-collision pads 402172 are installed on the corresponding pistons 4029. When the pistons 4029 are fully inserted into the grooves of the guide rod end caps 4022, hard contact is prevented between the pistons 4029 and the edges of the guide rod end caps 4022.

[0010] Another technical solution adopted by this utility model is: a sealed box, which includes the aforementioned sealed door.

[0011] Compared with the prior art, the present invention has the following advantages: the mechanical seal of the door frame assembly 1 and the airbag seal of the gas sealing assembly 2 form a double protection. After the airbag is inflated, it forms a seamless annular sealing strip, which can not only meet the basic requirements of dust prevention at normal temperature, but also adjust the pressure through the air pressure control system, making it suitable for harsh scenarios such as high and low temperature test chambers, vacuum reactors and sealed boxes with liquid barrier and gas leakage protection.

[0012] When inflated, the airbag 201 can bulge in a directional direction towards the door body, automatically filling the tiny gap between the door body and the door frame; the rounded corners and high-precision machining of the edge of the door body 3 further ensure that the airbag and the door body are in uniform contact, avoiding sealing failure caused by local pressure concentration, and maintaining a stable sealing effect even under temperature changes and vibration environments.

[0013] The parallel movement component 4 adopts a rodless cylinder mechanism 402 with symmetrical distribution on both sides. It synchronously pulls the door body 3 through the mounting plate 403. Combined with the precise positioning of the mounting rib plate 401, the front and rear swing of the door body during the lifting and lowering process is controlled within 1mm. This prevents the door body from tilting due to unilateral force and ensures that the edge of the door body is precisely fitted with the door frame component 1, laying the foundation for airbag sealing.

[0014] The rodless cylinder mechanism 402 achieves contactless transmission through the magnetic attraction between the inner magnetic ring 4025 and the outer magnetic ring 40210, eliminating the gap error of the traditional piston rod. The inner / outer wear-resistant rings are precisely honed in conjunction with the inner wall of the guide rod, making the slider movement resistance uniform and without jamming, further ensuring the straightness of the door lifting trajectory and avoiding damage to the sealing surface due to movement deviation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the sealing door of this utility model.

[0016] Figure 2 This is a front view of the sealing door of this utility model.

[0017] Figure 3 for Figure 2 Sectional view of AA.

[0018] Figure 4 for Figure 3 Enlarged view of point B in the middle.

[0019] Figure 5 This is a schematic diagram of a rodless cylinder mechanism.

[0020] Figure 6 This is a cross-sectional view of a rodless cylinder mechanism.

[0021] Figure 7 This is a schematic diagram of the structure of the sealing box of this utility model.

[0022] Figure 8 This is a side view of the sealing box of this utility model.

[0023] Figure 9 for Figure 8 A cross-sectional view of CC.

[0024] The components include: 1. Door frame assembly; 101. Door frame body; 102. Gas sealing assembly mounting body; 103. Mounting ring groove; 2. Gas sealing assembly; 201. Airbag; 202. Airbag inlet; 3. Door body; 4. Parallel movement assembly; 401. Mounting rib; 402. Rodless cylinder mechanism; 4021. Hollow cylindrical guide rod; 4022. Guide rod end cap; 4023. Air inlet; 4024. Connecting rod; 4025. Inner magnetic ring; 4026. 4027. Inner magnetic ring spacer; 4028. Inner wear-resistant ring; 4029. Piston O-ring; 4020. Piston; 40210. Outer magnetic ring; 40211. Outer magnetic ring spacer; 40212. Slider; 40213. Outer wear-resistant ring; 40214. Slider end cap; 40215. Oil scraper ring; 40216. Buckle ring; 40217. Anti-collision component; 402171. Buffer O-ring; 402172. Anti-collision pad; 403. Mounting plate. Detailed Implementation

[0025] The technical solutions of the sealing door and its device provided by this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] Example 1 refer to Figures 1-6 As shown, the sealing door includes a door frame assembly 1, which is fixedly installed at the opening of a preset box.

[0027] Furthermore, the door frame assembly 1 includes: The door frame 101 is fixedly installed inside the four sides of the opening of the pre-set box. The door frame 101 is integrally formed from high-strength alloy material and is rigidly connected to the inner walls of the four sides of the opening of the pre-set box by bolts. The connection is filled with fireproof sealant to form a primary mechanical seal.

[0028] The gas sealing assembly mounting body 102 is fixed inside the door frame body 101.

[0029] The mounting groove 103 is located on the side of the gas sealing assembly mounting body 102 facing the pre-set box. The gas sealing assembly mounting body 102 and the airbag mounting groove 103 provide a mounting carrier for the gas sealing assembly 2. The gas sealing assembly mounting body 102, as an embedded structure of the door frame 101, provides support strength for the mounting groove 103 and ensures precise alignment when the door is closed through its inclined guide structure.

[0030] The sealed door also includes a gas sealing assembly 2, which is installed circumferentially on the door frame assembly 1. The gas sealing assembly 2, as the core sealing unit of the sealed door, is arranged completely circumferentially along the door frame assembly 1, forming a closed-loop sealing structure.

[0031] Furthermore, the gas sealing assembly 2 includes an airbag 201 located within the mounting ring groove 103. The airbag 201 is integrally vulcanized from oil-resistant and high / low temperature-resistant EPDM rubber or fluororubber, with an "O"-shaped cross-section that precisely matches the groove shape of the mounting ring groove 103. The length of the airbag 201 is exactly the same as the circumference of the mounting ring groove 103, and both ends are sealed together by a heat-sealing process to form a seamless annular seal. In the uninflated state, the top of the airbag 201 is lower than the groove opening plane of the mounting ring groove 103, avoiding mechanical interference with the door body; when inflated, its top can extend 3-5mm above the groove opening, ensuring a tight fit with the door surface.

[0032] The air vent 202 is fixedly mounted on the airbag 201 and extends from the upper surface of the door frame 101 into the pre-set housing. The air vent 202 is precision-machined from brass. One end is fixedly connected to the pre-reserved interface of the airbag 201 via a threaded or snap-fit ​​structure, with the connection using a double seal ring. The other end has a standard nozzle interface, which extends through a pre-set through hole in the door frame 101 into the inner side of the pre-set housing. The extended end of the air vent 202 is equipped with a dust cap to effectively prevent impurities from entering the air passage when not in use. Furthermore, the air vent 202 integrates a one-way valve structure to maintain stable internal air pressure when inflation / deflation operations are interrupted.

[0033] The airbag 201 is pre-fixed in the mounting ring groove 103 by vulcanized adhesive or micro buckles to prevent displacement of the airbag during the opening and closing of the door. The inner side wall of the mounting ring groove 103 is provided with a guide slope, which can guide the airbag to bulge in the direction of the door when it is inflated, and avoid disorderly expansion in other directions in the groove.

[0034] The portion of the air vent 202 extending into the inner side of the enclosure can be connected to an existing pneumatic control system via a pressure-resistant air pipe, forming a complete air circulation path. Existing pneumatic control systems include at least solenoid valves, pressure gauges, and air compressors. The advantage of this built-in air vent design is that when the door is closed, the air vent and connecting pipes are all inside the enclosure, preventing any impact on the door's sealing surface and avoiding interference from external pipelines during door opening and closing.

[0035] This technical solution enables the sealing pressure after inflation to be concentrated on the contact surface between the door and the door frame, forming a uniform annular sealing band, thanks to the constraint of the mounting groove 103 and the structural design of the airbag. Furthermore, the air pressure control system connected to the airbag port 202 allows for adjustment of the airbag inflation pressure according to different scenario requirements based on the internal pressure of the enclosure and the characteristics of the medium, achieving multi-level switching from low-pressure sealing for dust prevention to high-pressure sealing for liquid or gas barrier applications.

[0036] The sealing door also includes a door body 3. The overall outline of the door body 3 perfectly matches the preset opening size of the box, ensuring no misalignment gaps when closed. The four edges of the door body 3 are rounded to prevent injury to personnel during use, and to reduce friction with the door frame assembly 1 when the door is closed. At the same time, it guides the airbag 201 to fit evenly, avoiding sealing failure caused by local pressure concentration.

[0037] The sealed door also includes: a parallel movement assembly 4, which is installed on both sides of the door frame assembly 1; the door body 3 is fixedly installed on the parallel movement assembly 4. The parallel movement assembly 4 serves as the driving core of the door body 3, and achieves smooth lifting and lowering of the door body through a rodless cylinder mechanism symmetrically placed on both sides.

[0038] When the parallel moving component 4 moves the door body 3 down to the position where it docks with the door frame component 1, the edge of the door body fits into the door frame component 1, and the gap between the door body and the door frame component 1 is filled by the gas sealing component 2 after being inflated, thus completing the sealing between the sealed door and the preset box.

[0039] Furthermore, the parallel movement component 4 includes: At least four mounting ribs 401 are fixedly mounted on parallel vertical beams of the pre-set housing, with two mounting ribs 401 located on each vertical beam. Two mounting ribs 401 are symmetrically arranged on each of the vertical beams on both sides of the pre-set housing, forming two sets of upper and lower support points. The axis connecting the upper and lower ribs on the same side is strictly parallel to the vertical beam, while the axis connecting the corresponding ribs on both sides is horizontally collinear, providing a precise installation reference for the rodless cylinder mechanism 402. A waist-shaped adjustment hole is machined in the middle of the mounting rib 401, which is connected to the vertical beam by M10 high-strength bolts, allowing for ±3mm height fine-tuning, facilitating the calibration of the horizontality of the cylinders on both sides during installation. A 0.5mm thick anti-slip rubber pad is attached to the contact surface between the mounting rib 401 and the vertical beam to increase the friction coefficient, prevent loosening, and reduce vibration transmission.

[0040] At least two rodless cylinder mechanisms 402 are located between two mounting ribs 401 on corresponding vertical beams. The rodless cylinder mechanism 402 serves as the drive core, is arranged symmetrically on both sides, and is connected to the same air source pipeline through the air inlets of the two cylinders via a T-joint.

[0041] At least one set of mounting plates 403, one end of each mounting plate 403 is mounted on the corresponding rodless cylinder mechanism 402, and the other end of each mounting plate 403 is mounted on the door body 3. The mounting plate 403 serves as a connecting bridge between the door body 3 and the rodless cylinder mechanism 402. A 1mm thick polyurethane buffer pad is provided between the mounting plate 403 and the door body to absorb the impact vibration during the lifting, lowering, starting, and stopping of the door body, while also compensating for installation errors between the door body and the cylinder.

[0042] The door body 3 is moved up and down by the rodless cylinder mechanism 402 to open and close the sealed door.

[0043] This technical solution can achieve the following: by symmetrically distributing at least two rodless cylinder mechanisms 402 along the preset box vertical beam, and then synchronously pulling the door body 3 through the mounting plate 403, the door body is subjected to balanced force. During the lifting and lowering process, the front and rear sway is controlled within 1mm, avoiding the tilting of the door body due to unilateral force, and ensuring that the sealing surface and the door frame assembly 1 are accurately aligned.

[0044] Furthermore, the rodless cylinder mechanism 402 includes: Hollow cylindrical guide rod 4021; Two guide rod end caps 4022 are located at both ends of the hollow cylindrical guide rod 4021; Two air ports 4023 are located on the corresponding guide rod end caps 4022; Connecting rod 4024; Multiple inner magnetic rings 4025 and magnetic ring spacer inner rings 4026 are spaced apart and mounted on a connecting rod 4024. The alternating arrangement of the inner magnetic rings 4025 and magnetic ring spacer inner rings 4026 forms a strong magnetic field.

[0045] At least two inner wear-resistant rings 4027, at least two piston O-rings 4028, and two pistons 4029 are provided, wherein the inner wear-resistant rings 4027, piston O-rings 4028, and pistons 4029 are installed sequentially from the center to both sides on the axial direction of the connecting rod 4024. Multiple outer magnetic rings 40210 and magnetic ring spacer outer rings 40211 are spaced and fitted onto a hollow cylindrical guide rod 4021; the outer magnetic rings 40210 and magnetic ring spacer outer rings 40211 have different magnetic properties than the inner magnetic rings 4025.

[0046] Slider 40212 is fitted around the hollow cylindrical guide rod 4021; At least two outer wear-resistant rings 40213 are installed between the hollow cylindrical guide rod 4021 and the slider 40212, and are respectively located next to the outermost magnetic ring spacer ring 40211; Two slider end caps 40214 are press-fitted onto the corresponding outer wear-resistant rings 40213; At least two oil scraper rings 40215 are located in the grooves of the corresponding slider end caps 40214; Two retaining rings 40216 are respectively installed on the corresponding slider end caps 40214 to press the slider end caps 40214.

[0047] Furthermore, each guide rod end cap 4022 is mounted on the corresponding mounting rib 401 at both ends.

[0048] Furthermore, the rodless cylinder mechanism 402 also includes an anti-collision component 40217, which is located between the guide rod end cap 4022 and the corresponding piston 4029; When the piston 4029 moves into the guide rod end cap 4022, the anti-collision component 40217 slows down the piston 4029 and slowly enters the groove, thus preventing hard contact between the piston 4029 and the edge of the guide rod end cap 4022.

[0049] Furthermore, the anti-collision component 40217 includes: At least two buffer O-rings 402171 are respectively installed in the grooves on the inner end face of the guide rod end cap 4022. When the piston 4029 moves into the groove of the guide rod end cap 4022, the piston 4029 decelerates and slowly enters the groove. At least two anti-collision pads 402172 are installed on the corresponding pistons 4029. When the pistons 4029 are fully inserted into the grooves of the guide rod end caps 4022, hard contact is prevented between the pistons 4029 and the edges of the guide rod end caps 4022.

[0050] Specifically, when compressed air enters the hollow cylindrical guide rod 4021 through one air port 4023, the air pressure pushes the piston 4029 to move along the inner wall of the guide rod to the other end. The inner magnetic ring 4025 in the piston assembly and the outer magnetic ring 40210 in the outer slider 40212 generate a magnetic attraction. Due to the penetrating power of the magnetic field, the linear motion of the inner piston is synchronously transmitted to the outer slider through magnetic force, causing the slider to move in the same direction along the hollow cylindrical guide rod 4021. At this time, the inner wear-resistant ring 4027 reduces the friction between the piston and the inner wall of the guide rod, and the piston O-ring 4028 ensures the sealing of the air cavity inside the guide rod, preventing air leakage and power loss.

[0051] During the movement of slider 40212, the outer wear-resistant ring 40213 provides radial support, ensuring that the parallelism error between the slider's trajectory and the guide rod axis is ≤0.1mm / m. Slider end cap 40214 presses the outer wear-resistant ring tightly with a retaining ring 40216, while the oil scraper ring 40215 within its groove continuously removes oil and dust from the guide rod surface, preventing impurities from entering the slider and affecting its movement accuracy. When reverse movement is required, compressed air is switched to the other air port 4023, pushing the piston to move in the opposite direction. This, along with magnetic coupling, drives the slider to move synchronously in the opposite direction, achieving the lifting and lowering switching of the door.

[0052] When the piston 4029 moves to the vicinity of the guide rod end cap 4022, the anti-collision component 40217 activates dual protection. First, the piston contacts the buffer O-ring 402171 inside the guide rod end cap, and the elastic deformation of the rubber ring generates a damping force to slow down the piston. Subsequently, the anti-collision pad 402172 on the piston end face makes flexible contact with the groove of the end cap, completely eliminating hard collisions. Finally, the piston smoothly stops at the preset position inside the end cap, and the slider also stops moving synchronously.

[0053] The rodless cylinder mechanism 402, through magnetic coupling technology and precision structural design, perfectly balances motion accuracy, space efficiency and reliability, providing core power guarantee for the smooth lifting and lowering of the sealing door. It is especially suitable for high-end sealing equipment scenarios with strict requirements for operational stability, installation space and maintenance costs.

[0054] Example 2 refer to Figures 7-9As shown, the sealed box includes the sealed door described in Embodiment 1 above. The main function of the sealed box is to effectively isolate the internal space from the external environment. The design of the sealed door strengthens the sealing of the sealed box from multiple dimensions. First, the door frame 101 in the door frame assembly 1 is integrally formed from high-strength alloy material and is rigidly connected to the inner walls of the four sides of the sealed box opening by bolts. The connection is filled with fireproof sealant to form a primary mechanical seal, laying a basic and stable sealing defense line for the sealed box, which can initially prevent external dust, moisture and other impurities from entering the box.

[0055] The gas sealing assembly 2, as the core sealing execution unit, further enhances the sealing level of the sealed enclosure. The airbag 201 has an "O"-shaped cross-section that precisely matches the mounting ring groove 103, with its length perfectly matching the circumference of the groove. Both ends are sealed together using a heat-sealing process to form a seamless annular seal. This structural design ensures that when the airbag inflates, a complete and uniform sealing band is formed between the enclosure door and the frame, effectively avoiding dead zones. Simultaneously, the air pressure control system connected to the airbag port 202 can flexibly adjust the airbag inflation pressure according to the characteristics or pressure requirements of the medium stored inside the enclosure, such as volatile gases or liquids, achieving multi-level switching from low-pressure dustproof sealing to high-pressure sealing for liquid or gas barrier applications. When the enclosure is used to store volatile chemical reagents, it can be adjusted to a high-pressure sealing state to prevent reagent evaporation and leakage; when used only for storing ordinary precision instruments requiring dustproof protection, it can be switched to a low-pressure sealing state, greatly improving the adaptability of the enclosure in different usage scenarios and ensuring that the enclosure always maintains excellent sealing performance.

[0056] The smooth operation of the sealed box door directly affects its user experience and overall lifespan. The parallel movement component 4 of the sealed door provides a solid guarantee for the smooth lifting and lowering of the door body 3. In the parallel movement component 4, two mounting ribs 401 are symmetrically arranged on each of the vertical beams on both sides of the box body, forming two sets of upper and lower support points. The line connecting the axes of the upper and lower ribs on the same side is strictly parallel to the vertical beam, and the lines connecting the axes of the corresponding ribs on both sides are horizontally collinear, providing a precise installation reference for the rodless cylinder mechanism 402, ensuring that the rodless cylinder mechanism 402 can stably and reliably drive the door body movement. The rodless cylinder mechanism 402 is symmetrically arranged on both sides, and the air inlets of the cylinders on both sides are connected to the same air source pipeline through a T-connector. This design ensures that the door 3 receives a balanced driving force during lifting and lowering. Simultaneously, a 1mm thick polyurethane buffer pad is installed between the mounting plate 403 and the door body connection surface to absorb the impact vibration during door lifting and stopping, compensate for installation errors, and further ensure balanced force on the door body. The forward and backward sway during lifting and lowering is controlled within 1mm, preventing door tilting due to unilateral force. For the sealing box, the smooth operation of the door prevents unnecessary friction or collision between the door body and the door frame assembly 1, reduces wear on the door body and door frame, extends the service life of the sealing box door body and related components, and reduces equipment maintenance costs. Furthermore, the precision structure of the rodless cylinder mechanism 402 itself ensures operational stability. The inner wear-resistant ring 4027 reduces friction between the piston and the inner wall of the guide rod, while the piston O-ring 4028 ensures the sealing of the internal air chamber of the guide rod, preventing air leakage and power loss. The outer wear-resistant ring 40213 provides radial support, ensuring that the parallelism error between the slider's movement trajectory and the guide rod axis is ≤0.1mm / m. The oil scraper ring 40215 can remove oil and dust from the guide rod surface in real time, preventing impurities from entering the slider and affecting movement accuracy. These design details work together to make the door's lifting and lowering movements precise and smooth, providing a stable operating experience for the daily use of the sealing box. In addition, the anti-collision component 40217 in the rodless cylinder mechanism 402, through the double protection of the buffer O-ring 402171 and the anti-collision pad 402172, avoids hard contact between the piston 4029 and the guide rod end cover 4022. This not only prevents violent impact when the door is raised or lowered to the limit position, protecting the door and cylinder components, but also reduces the noise during equipment operation, creating a quieter operating environment. This is especially important for sealed boxes that need to operate in a relatively quiet environment.

[0057] The above description details one embodiment of the present utility model, but it is merely a preferred embodiment and should not be construed as limiting the scope of the present utility model. All equivalent variations and improvements made within the scope of the present utility model application should still fall within the patent coverage of the present utility model.

Claims

1. A sealed door, characterized in that, The sealed door includes: Door frame assembly (1), which is fixedly installed at the opening of the preset box; Gas sealing assembly (2), which is installed in the circumferential direction of door frame assembly (1); Door body (3); Parallel moving components (4) are installed on both sides of the door frame assembly (1); the door body (3) is fixedly installed on the parallel moving components (4); When the parallel moving component (4) moves the door (3) down to the door frame component (1), the edge of the door fits against the door frame component (1), and the gap between the door and the door frame component (1) is filled by the gas sealing component (2) after being inflated, thus completing the sealing between the sealed door and the preset box.

2. The sealing door according to claim 1, characterized in that, The door frame assembly (1) includes: The door frame (101) is fixedly installed inside the four sides of the opening of the preset box; Gas sealing assembly mounting body (102) is fixed inside the door frame body (101); The mounting groove (103) is located on the side of the gas sealing assembly mounting body (102) facing the preset housing; The gas sealing assembly mounting body (102) and the airbag mounting ring groove (103) provide mounting carriers for the gas sealing assembly (2).

3. The sealing door according to claim 2, characterized in that, The gas sealing assembly (2) includes: Airbag (201), which is located in mounting ring groove (103); The air vent (202) is fixedly installed on the airbag (201) and extends from the upper surface of the door frame (101) into the preset box.

4. The sealing door according to claim 2, characterized in that, The parallel movement component (4) includes: At least four mounting ribs (401) are fixedly mounted on mutually parallel vertical beams of the pre-set box, and every two mounting ribs (401) are located on one vertical beam; At least two rodless cylinder mechanisms (402) are located between two mounting ribs (401) on the corresponding vertical beams; At least one set of mounting plates (403), one end of each mounting plate (403) is mounted on the corresponding rodless cylinder mechanism (402), and the other end of each mounting plate (403) is mounted on the door body (3); The door body (3) is moved up and down by a rodless cylinder mechanism (402) to achieve the opening and closing of the sealed door.

5. The sealing door according to claim 4, characterized in that, The rodless cylinder mechanism (402) includes: Hollow cylindrical guide rod (4021); Two guide rod end caps (4022) are located at both ends of the hollow cylindrical guide rod (4021); Two air ports (4023) are located on the corresponding guide rod end caps (4022); Connecting rod (4024); Multiple inner magnetic rings (4025) and magnetic ring spacer inner rings (4026) are spaced apart and mounted on the connecting rod (4024); At least two inner wear-resistant rings (4027), at least two piston O-rings (4028), and two pistons (4029) are installed in sequence from the center to both sides on the axial direction of the connecting rod (4024); Multiple outer magnetic rings (40210) and magnetic ring spacer outer rings (40211) are spaced and fitted onto a hollow cylindrical guide rod (4021); The slider (40212) is fitted outside the hollow cylindrical guide rod (4021); At least two outer wear-resistant rings (40213) are installed between the hollow cylindrical guide rod (4021) and the slider (40212), and are located next to the outermost magnetic ring spacer ring (40211); Two slider end caps (40214) are press-fitted onto the corresponding outer wear rings (40213); At least two oil scraper rings (40215) are located in the grooves of the corresponding slider end caps (40214); Two retaining rings (40216) are respectively installed on the corresponding slider end caps (40214) to press the slider end caps (40214).

6. The sealing door according to claim 5, characterized in that, Each guide rod end cap (4022) is mounted on the corresponding mounting rib (401) at both ends.

7. The sealing door according to claim 6, characterized in that, The rodless cylinder mechanism (402) also includes an anti-collision component (40217), which is located between the guide rod end cap (4022) and the corresponding piston (4029); When the piston (4029) moves into the guide rod end cap (4022), the anti-collision component (40217) slows down the piston (4029) and slowly enters the groove, and avoids hard contact between the piston (4029) and the edge of the guide rod end cap (4022).

8. The sealing door according to claim 7, characterized in that, The anti-collision component (40217) includes: At least two buffer O-rings (402171) are respectively installed in the grooves on the inner end face of the guide rod end cap (4022). When the piston (4029) moves into the groove of the guide rod end cap (4022), the piston (4029) decelerates and slowly enters the groove. At least two anti-collision pads (402172) are installed on the corresponding pistons (4029) respectively. When the pistons (4029) are fully inserted into the groove of the guide rod end cap (4022), hard contact is prevented between the pistons (4029) and the edge of the guide rod end cap (4022).

9. A sealed box, characterized in that, The sealed box includes the sealed door as described in any one of claims 1-8.

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