A pressure-bearing quick-opening door for a medium-high pressure container

Abstract

The utility model discloses a kind of pressure-bearing quick-opening door devices for medium-high pressure vessel, including door locking frame, door body, lifting lifting device and safety interlocking device;Annular lock plate is equipped with in door locking frame outer end surface inside, annular lock plate and frame body form annular locking gap, notch is opened on annular lock plate;Door body includes fixed part and rotating part, rotating part edge is equipped with the door meshing tooth corresponding with notch, rotating part is connected with door body locking plate two;Lifting lifting device is installed in door locking frame, its output end is movably connected with door body locking plate two through lifting lifting pin shaft;Safety interlocking device has three-level protection: pressure interlock prevents door opening when container has pressure;Mechanical interlock ensures that rotating part is movable only in unlocking position by anti-rotation body;When door tooth is not completely separated, movement interlock prohibits drive mechanism to start.The utility model compact structure, lightweight, realizes automatic locking and unlocking, convenient operation, with multiple safety protection, applicable to medium-high pressure quick sealing occasion.

Description

Technical Field

[0001] This utility model relates to the field of pressure vessel sealing technology, specifically to a pressure-bearing quick-opening door for medium and high pressure vessels. Background Technology

[0002] With the rapid development of modern industry and scientific research technology, medium and high pressure vessels are increasingly used in deep-sea rescue and salvage, saturation diving experiments, and various chemical processes. These vessels typically need to form a sealed pressure-bearing space, and the sealed doors for personnel or equipment to enter and exit become one of the key pieces of equipment, the performance of which directly affects the safety, reliability, and ease of operation of the entire system.

[0003] Currently, pressure-bearing sealing doors used in medium- and high-pressure environments typically employ complex and bulky designs to achieve reliable sealing and pressure resistance. Common structural forms include toothed clamp quick-opening structures or similar rigid locking mechanisms. While these traditional structures can theoretically meet pressure requirements, they have revealed numerous problems in practical use: (1) Complex structure and large size: In order to achieve high-strength locking, the door and locking mechanism are often designed to be very thick and heavy, resulting in a large overall size and heavy weight of the equipment. This not only increases manufacturing costs and material consumption, but also puts forward higher requirements for the overall structural design of the container.

[0004] (2) Difficult to open and close: Due to the heavy weight of the door and the high locking force required, it is very difficult to open and close manually. It usually requires the use of large tools or the cooperation of many people. The operation process is complicated and inefficient, and cannot meet the needs of quick entry and exit.

[0005] (3) Insufficient safety protection measures: Many existing devices lack a sound safety interlock mechanism. When there is still residual pressure inside the container, there is a safety risk of accidentally opening the door, which may lead to catastrophic personal injury and equipment accidents. At the same time, there is a lack of effective mechanical or electrical interlock protection against misoperation during locking and opening.

[0006] (4) Low level of automation: Traditional sealing doors rely heavily on manual operation, have low automation integration, are difficult to seamlessly connect with modern automated control systems, and cannot achieve remote control and status monitoring, which limits their application in intelligent and unmanned operation scenarios.

[0007] In summary, existing pressure-bearing and sealing doors have significant shortcomings in terms of safety, convenience, and automation. Therefore, there is an urgent need in this field for a new type of pressure-bearing quick-opening door that can achieve lightweight construction, automated operation, and integrated multiple safety interlocks while ensuring pressure-bearing and sealing performance, thereby solving the aforementioned long-standing technical challenges. Utility Model Content

[0008] To address the aforementioned issues, the purpose of this invention is to provide a pressure-bearing quick-opening door for medium and high-pressure containers. This door achieves lightweight structure, automated operation, and enhanced safety and reliability. By integrating multiple safety interlocking protection mechanisms, it ensures that the door cannot be opened before the pressure inside the container is fully released, and prevents the container from pressurizing if the door is not fully locked. This effectively avoids safety accidents caused by misoperation, while also improving operational convenience and efficiency.

[0009] The objective of this utility model is achieved through the following technical solution: A pressure-bearing quick-opening door for medium and high pressure vessels includes a container through-tube connected to the container and a door locking frame fixed (welded) to the container through-tube, as well as a door body, a lifting device and a safety interlocking device.

[0010] The door locking frame has an inner end face and an outer end face facing the door body; on the inner side wall of the outer end face of the door locking frame, an annular locking plate extends integrally towards the center, and an annular locking gap is formed between the annular locking plate and the inner end face of the door locking frame; the annular locking plate has a plurality of notches along the circumferential direction that communicate with the locking gap.

[0011] The door body includes a fixed part and a rotating part that can rotate relative to each other; the fixed part is hinged to the side of the door locking frame via a door pivot; the outer edge of the rotating part is provided with door engaging teeth corresponding to the notch on the annular lock plate, and the door engaging teeth can be misaligned or aligned with the notch on the annular lock plate as the rotating part rotates, thereby achieving locking or unlocking; a second door locking plate is fixedly connected to the rotating part.

[0012] The lifting device is installed on the door locking frame, and its output end is connected to a lifting pin. The lifting pin is movably connected to the second door locking plate. By driving the lifting pin, the second door locking plate and the rotating part are rotated, thereby locking or unlocking the door.

[0013] The safety interlock device is used to prevent the container from pressurizing when the door is not fully locked, and to prevent the door from being opened when the container is pressurized. The safety interlock device includes an anti-rotation body, a door locking plate, and a driving component. The anti-rotation body is rotatably mounted on the door locking frame, with a portion of its outer surface being flat and the remainder being arc-shaped. One end of the door locking plate is fixed to the rotating part of the door, and the other end has an arc-shaped groove that matches the arc-shaped surface of the anti-rotation body. The driving component is used to drive the anti-rotation body to rotate. When the flat surface of the anti-rotation body is opposite to the arc-shaped groove, the rotating part of the door can rotate freely. When the arc-shaped surface of the anti-rotation body rotates into the arc-shaped groove, the rotating part of the door is locked.

[0014] Preferably, the safety interlock device further includes a safety interlock ball valve, which is installed on a pipe connected to the inside of the container, and the valve stem is coaxially and fixedly connected to the anti-rotation body; the driving component drives the valve stems of the anti-rotation body and the safety interlock ball valve to rotate synchronously through the safety interlock handle to achieve pressure interlock; when the plane of the anti-rotation body is opposite to the arc-shaped groove, the safety interlock ball valve is in the open state; when the arc surface of the anti-rotation body rotates into the arc-shaped groove, the safety interlock ball valve is in the closed state.

[0015] Furthermore, this utility model can integrate an electric drive mechanism and a manual drive mechanism to achieve automatic or manual operation. The electric drive mechanism includes a geared motor and a gear transmission mechanism for driving the overall opening and closing of the door; the manual drive mechanism includes a drive gear and a rack for emergency or manual operation. By rotating the drive gear, the rotating part can be driven to rotate, causing the door meshing teeth to switch between the notch and the locking gap of the annular lock plate. A sealing ring groove is provided on the inner end face of the door locking frame to install the sealing ring and ensure sealing performance.

[0016] The beneficial effects of this utility model are as follows: (1) Simplified structure and lightweight: Through the integrated ring lock plate and split door design, the complexity and weight of the traditional clamp structure are reduced, realizing the compactness and lightweight of the pressure-bearing quick-opening door, reducing manufacturing costs and installation difficulty.

[0017] (2) Convenient and automated operation: The door is automatically locked, unlocked and opened by adopting a lifting device and an electric drive mechanism, which greatly improves the efficiency of operation, reduces manual intervention and is suitable for scenarios with fast entry and exit requirements.

[0018] (3) Multiple safety interlock protection: Level 1 pressure interlock: The drive components cannot operate when the pressure is not released, preventing the door from being opened under pressure.

[0019] The second-level mechanical interlock: the anti-rotation body cooperates with the door locking plate to ensure that the door rotating part can only be driven to rotate when the anti-rotation body is in the unlocked position, thus avoiding misoperation.

[0020] The third-level motion interlock: the electric drive mechanism cannot start when the door engagement teeth are not completely disengaged from the annular lock plate, ensuring the safety of the door in the locked state.

[0021] (4) High reliability and adaptability: This utility model is suitable for medium and high pressure environments (such as deep-sea diving, chemical containers, etc.), has good sealing performance, strong pressure bearing capacity, and retains emergency operation capability through manual drive mechanism, which enhances the robustness of the system.

[0022] (5) Intelligent integration: All drive mechanisms (drive components, lifting devices and geared motors) can be seamlessly connected with modern control systems to achieve remote monitoring and automated control, meeting the needs of intelligent and unmanned operation scenarios.

[0023] In summary, this utility model effectively solves the technical defects of existing pressure-bearing sealing doors through innovative structural design and multiple safety interlocking mechanisms, achieving significant improvements in safety, operational efficiency, and automation. Attached Figure Description

[0024] The present invention will now be described in further detail with reference to the accompanying drawings.

[0025] Figure 1 This is a structural schematic diagram of the pressure-bearing quick-opening door described in this utility model.

[0026] Figure 2 This is a front view of the pressure-bearing quick-opening door described in this utility model.

[0027] Figure 3 This is a top view of the pressure-bearing quick-opening door described in this utility model.

[0028] Figure 4 for Figure 1 A magnified view of a portion of point A in the middle.

[0029] Figure 5 This is a schematic diagram of the safety interlocking device described in this utility model.

[0030] The figure shows: 1-Container through cylinder, 2-Door locking frame, 21-Annular lock plate, 22-Locking gap, 23-Notch, 3-Door body, 31-Fixing part, 32-Rotating part, 321-Door meshing teeth, 33-Door pivot, 34-Door body locking plate II, 341-Strip hole, 4-Lifting and lifting device, 41-Lifting and lifting pin, 5-Safety interlock device, 51-Anti-rotation body, 511-Flat surface, 512-Arc surface, 52-Door body locking plate I, 521-Arc groove, 53-Drive component, 531-Oval hole, 54-Safety interlock handle, 6-Safety interlock ball valve, 7-Electric drive mechanism, 71-Reduction motor, 72-Gear transmission mechanism, 73-Rotating frame, 8-Manual drive mechanism, 81-Drive gear, 82-Rack, 83-Handle. Detailed Implementation

[0031] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. The described embodiments are merely some embodiments of this utility model, 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.

[0032] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0034] like Figures 1 to 4 As shown, this embodiment provides a pressure-bearing quick-opening door for medium and high pressure vessels, mainly including a vessel through-tube 1, a door locking frame 2, a door body 3, a lifting and hoisting device 4, and a safety interlocking device 5.

[0035] The container through-tube 1 is fixedly connected to the container opening by welding or other means, serving as the basis for the installation of the door.

[0036] The door locking frame 2 is welded and fixed to the outer end of the container through-tube 1. The door locking frame 2 has an inner end face facing the inside of the container and an outer end face facing the outside. On the inner sidewall of its outer end face, an annular locking plate 21 extends integrally towards the center, forming an annular locking gap 22 between the annular locking plate 21 and the inner end face of the door locking frame 2. Several (e.g., 8) notches 23 are evenly provided circumferentially on the annular locking plate 21, communicating with the locking gap 22. On the inner end face of the door locking frame 2, a sealing ring groove for installing a sealing ring (such as an O-ring) is also machined. The sealing ring groove is coaxially arranged with the annular locking plate (the centers of both are located on the central axis of the door locking frame 2), and the outer diameter of the sealing ring groove is smaller than the inner diameter of the annular locking plate 21 to ensure the sealing performance when the door is closed.

[0037] The door body 3 adopts a split design, including a fixed part 31 and a rotating part 32, which can rotate relative to each other through bearings and other structures. The fixed part 31 is hinged to the side of the door locking frame 2 via a door pivot 33, so that the door body 3 can rotate around the door pivot 33 as a whole to open or close. The outer edge of the rotating part 32 is provided with door engaging teeth 321 corresponding to the number and position of notches 23 on the annular lock plate 21. A door locking plate 34 is also fixedly connected to the rotating part 32, and this plate has strip holes 341.

[0038] The lifting device 4 is fixedly installed above the door locking frame 2 by a bracket. In this embodiment, the lifting device 4 is preferably a cylinder, but it can also be a hydraulic cylinder or an electric push rod. The piston rod (output end) of the lifting device 4 extends downward and is connected to a lifting pin 41 at its end. The lifting pin 41 is slidably fitted into the slot 341 of the door locking plate 34.

[0039] Its basic locking and unlocking principle is as follows: Locking process: After the door 3 is closed in place (the inner side of the door 3 is pressed against the inner end face of the door locking frame 2, and the door engagement teeth 321 on the outer edge of the door 3 are aligned and engaged in the notches 23 on the annular lock plate 21, and simultaneously aligned with the locking gap 22), the piston rod of the lifting device 4 extends, driving the lifting pin 41 to move downward. Due to the sliding fit between the lifting pin 41 and the strip hole 341, it slides in the hole and applies a tangential force, causing the door locking plate 34 and the rotating part 32 fixed thereto to rotate by an angle. This causes the door engagement teeth 321 to rotate from the position aligned with the notches 23 of the annular lock plate 21 into the locking gap 22 behind the annular lock plate 21, thereby achieving engagement and locking. The pressure inside the container will act on the door 3, further forcing the door engagement teeth 321 to press against the annular lock plate 21, forming a self-tightening seal.

[0040] Unlocking process: The piston rod of the lifting device 4 retracts, driving the lifting pin 41 to move upward. Through the strip hole 341, it drives the door locking plate 34 and the rotating part 32 to rotate in the opposite direction, causing the door meshing teeth 321 to retract from the locking gap 22 to the position aligned with the notch 23, thereby achieving unlocking. Example 2

[0041] Based on Example 1, this example further elaborates on the safety interlock device 5.

[0042] The safety interlocking device 5 includes an anti-rotation body 51, a door locking plate 52, and a drive component 53.

[0043] The anti-rotation body 51 is rotatably mounted on the door locking frame 2 via a rotating shaft. A portion of its outer surface is cut to form a flat surface 511, while the remaining portion remains an arc surface 512.

[0044] One end of the door locking plate 52 is fixed to the rotating part 32 of the door body 3, and the other end is machined with an arc-shaped groove 521 that matches the arc surface 512 of the anti-rotation body 51.

[0045] The drive component 53 (in this embodiment, a cylinder is also used) is mounted on the door locking frame 2. A waist-shaped hole 531 is provided on its piston rod (telescopic end). One end of a safety interlock handle 54 is fixedly connected to the side wall of the anti-rotation body 51, and the other end is slidably sleeved in the waist-shaped hole 531 of the piston rod of the drive component 53.

[0046] Its working principle is as follows: Unlocked State: When it is necessary to open the door 3, the piston rod of the drive component 53 retracts, and through the cooperation of the waist-shaped hole 531 and the safety interlock handle 54, it drives the anti-rotation body 51 to rotate, so that its flat surface 511 is aligned with the arc-shaped groove 521 of the door locking plate 52. At this time, the door locking plate 52 and the rotating part 32 connected to it can rotate freely without being obstructed by the anti-rotation body 51.

[0047] Locked State: When the door 3 is locked, the piston rod of the drive component 53 extends, pushing the safety interlock handle 54, which in turn drives the anti-rotation body 51 to rotate, causing its arc surface 512 to rotate into the arc-shaped groove 521 of the door locking plate 52. Due to the tight fit between the arc surface 512 and the arc-shaped groove 521, the door locking plate 52 is jammed and cannot move, thus mechanically locking the rotating part 32 of the door 3 and preventing it from accidentally rotating and unlocking.

[0048] To achieve pressure interlocking, this embodiment also includes a safety interlock ball valve 6. This safety interlock ball valve 6 is installed on a pipe communicating with the interior of the container, and its valve stem is coaxially and fixedly connected to the shaft of the anti-rotation body 51 via a coupling or similar means. Therefore, while the drive component 53 drives the anti-rotation body 51 to rotate, it also synchronously drives the valve stem of the safety interlock ball valve 6 to rotate.

[0049] When the anti-rotation body 51 rotates to the unlocking position where the plane 511 aligns with the arc-shaped groove 521, the safety interlock ball valve 6 is in the open state, and the container can be depressurized or pressurized through this pipeline.

[0050] When the anti-rotation body 51 rotates to the locked position where the arc surface 512 is engaged with the arc groove 521, the safety interlock ball valve 6 is closed, cutting off the connection between the container and the external passage. Example 3

[0051] Based on embodiments 1 and 2, an electric drive mechanism 7 is added to this embodiment to improve the level of automation.

[0052] The electric drive mechanism 7 includes a reduction motor 71 and a gear transmission mechanism 72. The fixed part 31 of the door body 3 is fixedly connected to the door pivot 33 via a rotating frame 73. The door pivot 33 is mounted on the door locking frame 2 via a bearing seat. The reduction motor 71 is fixedly mounted on the door locking frame 2 or the container through-tube 1, and its output shaft is connected to the door pivot 33 via the gear transmission mechanism 72 (e.g., a pair of meshing gears, one gear coaxially fixed on the output shaft of the reduction motor 71, and the other gear coaxially fixed on the door pivot 33). By controlling the forward and reverse rotation of the reduction motor 71, the fixed part 31 of the door body 3 (along with the entire door body) can be driven to rotate around the door pivot 33, realizing the automatic opening and closing of the door body 3.

[0053] In addition, as a safety backup and emergency operation method, this embodiment also includes a manual drive mechanism 8. The manual drive mechanism 8 includes a drive gear 81 rotatably mounted on the door locking frame 2 via a bearing seat, and a rack 82 (arc-shaped) fixed to the rotating part 32 of the door body 3 and meshing with the drive gear 81. A handle 83 is fixed on the axle of the drive gear 81. When the automatic system malfunctions or manual fine operation is required, the operator can turn the handle 83 to drive the drive gear 81 to rotate, which in turn drives the arc-shaped rack 82 and the rotating part 32 to rotate, thereby manually engaging and disengaging the door meshing teeth 321 from the annular lock plate 21.

[0054] The working process and three-level interlocking protection of this utility model

[0055] Activation process:

[0056] 1. Confirm Depressurization: Before operation, it must be confirmed that the pressure inside the container has been completely released. The first level of pressure interlock can be achieved through electrical interlock control: a pressure sensor is installed on the container to monitor the internal pressure in real time. The signal from this pressure sensor is connected to the main control unit of the quick-opening door. When the pressure sensor detects that the internal pressure of the container is higher than the safety set value, the main control unit will immediately cut off the control signal output to the drive component 53. Therefore, if there is pressure inside the container, even if the operator attempts to operate the button to retract the drive component 53, the drive component 53 will not respond because it does not receive the action command, thus achieving electrical interlock blocking. Simultaneously, the safety interlock ball valve 6, which is mechanically synchronized with the anti-rotation body 51, is also in the closed position, and its status can serve as an auxiliary visual indicator of system locking.

[0057] 2. Release the mechanical lock: Control drive component 53 retracts the piston rod, causing the anti-rotation body 51 and safety interlock ball valve 6 to rotate, so that the plane 511 of the anti-rotation body 51 aligns with the arc-shaped groove 521 of the door locking plate 52. If this step is not completed, the arc surface 512 of the anti-rotation body 51 will block the rotation of the rotating part 32, forming a second-level mechanical interlock.

[0058] 3. Rotary unlocking: Control the lifting device 4 to operate. Through the cooperation of the lifting pin 41 and the strip hole 341, drive the rotating part 32 to rotate, so that the door meshing teeth 321 are aligned with the notch 23 of the annular lock plate 21.

[0059] 4. Opening the door: Start the reduction motor 71, which drives the entire door 3 to rotate and open through the gear transmission mechanism 72 and the door shaft 33. The main control unit of the quick-opening door will ensure that the reduction motor 71 can only be powered on and started after the door engagement teeth 321 are completely disengaged from the annular lock plate 21 (i.e., unlocking is completed). Otherwise, it will be electrically interlocked to prevent operation, forming a third-level motion interlock.

[0060] Locking procedure:

[0061] 1. Close the door: Start the geared motor 71 to drive the door 3 to rotate and close until the door 3 is completely in contact with the inner end face of the door locking frame 2.

[0062] 2. Rotary locking: Control the lifting device 4 to drive the rotating part 32 to rotate, so that the door meshing teeth 321 are screwed into the locking gap 22 to achieve initial meshing and locking.

[0063] 3. Final Locking and Pressure Isolation: The control drive component 53 extends the piston rod, causing the anti-rotation body 51 to rotate, so that its arc surface 512 engages in the arc-shaped groove of the door locking plate 52, mechanically locking the rotating part 32. At the same time, the safety interlock ball valve 6 is closed, isolating the container from the external passage and preparing for pressurization.

[0064] Other aspects of this utility model that are not detailed herein are all conventional techniques known to those skilled in the art.

[0065] It should be noted that the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0066] The scope of protection of this utility model is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A pressure-bearing quick-opening door for medium and high pressure vessels, comprising a vessel penetration cylinder connected to the vessel and a door locking frame fixed to the vessel penetration cylinder, characterized in that: It also includes the door body, lifting and hoisting device, and safety interlock device; The door locking frame has an inner end face and an outer end face facing the door body; on the inner side wall of the outer end face of the door locking frame, an annular locking plate extends integrally towards the center, and an annular locking gap is formed between the annular locking plate and the inner end face of the door locking frame; the annular locking plate has a plurality of notches that communicate with the locking gap along the circumferential direction. The door body includes a fixed part and a rotating part that can rotate relative to each other; the fixed part is hinged to the side of the door locking frame via a door pivot; the outer edge of the rotating part is provided with door engaging teeth corresponding to the notches on the annular lock plate; a second door locking plate is fixedly connected to the rotating part; The lifting device is installed on the door locking frame, and its output end is connected to a lifting pin; the lifting pin is movably connected to the door locking plate. The safety interlock device is used to prevent the container from pressurizing when the door is not fully locked, and to prevent the door from being opened when the container is pressurized. When the door is closed, the lifting device drives the lifting pin to move, which in turn drives the door locking plate and the rotating part to rotate, so that the door meshing teeth are screwed into the locking gap through the notch of the annular locking plate to achieve locking.

2. The pressure-bearing quick-opening door for medium and high pressure vessels according to claim 1, characterized in that: The second locking plate of the door body has a strip-shaped hole; the lifting and lifting pin is slidably sleeved in the strip-shaped hole of the second locking plate of the door body.

3. The pressure-bearing quick-opening door for medium and high pressure vessels according to claim 1, characterized in that: The safety interlocking device includes an anti-rotation body, a door locking plate, and a drive component; The anti-rotation body is mounted on the door lock frame, with a portion of its outer surface being a flat surface and the remainder being an arc surface; One end of the door locking plate is fixed to the rotating part of the door, and the other end is provided with an arc-shaped groove that matches the arc surface of the anti-rotation body. The drive component is mounted on the door locking frame and is used to drive the anti-rotation body to rotate; Specifically, when the plane of the anti-rotation body is opposite to the arc-shaped groove of the door locking plate, the door rotating part can rotate freely; when the arc surface of the anti-rotation body rotates into the arc-shaped groove, the door rotating part is locked.

4. The pressure-bearing quick-opening door for medium and high pressure vessels according to claim 3, characterized in that: It also includes a safety interlock ball valve, which is installed on a pipe connected to the inside of the container, and its valve stem is coaxially and fixedly connected to the anti-rotation body; the driving component drives the anti-rotation body and the valve stem of the safety interlock ball valve to rotate synchronously through a safety interlock handle; when the plane of the anti-rotation body is opposite to the arc-shaped groove, the safety interlock ball valve is in the open state; when the arc surface of the anti-rotation body rotates into the arc-shaped groove, the safety interlock ball valve is in the closed state.

5. The pressure-bearing quick-opening door for medium and high pressure vessels according to claim 3, characterized in that: The drive component and lifting device are cylinders, hydraulic cylinders, or electric push rods.

6. The pressure-bearing quick-opening door for medium and high pressure vessels according to claim 1, characterized in that: It also includes an electric drive mechanism for driving the door to open and close, the electric drive mechanism including a geared motor and a gear transmission mechanism, the geared motor being connected to the door shaft through the gear transmission mechanism.

7. The pressure-bearing quick-opening door for medium and high pressure vessels according to claim 6, characterized in that: The fixed part of the door body is fixedly connected to the door pivot through a rotating frame. The door pivot is mounted on the door locking frame through a bearing seat and is driven by the reduction motor through a gear transmission mechanism.

8. The pressure-bearing quick-opening door for medium and high pressure vessels according to claim 1, characterized in that: It also includes a manual drive mechanism, which includes a drive gear rotatably mounted on the door locking frame and a rack fixed to the rotating part of the door body and meshing with the drive gear.

9. The pressure-bearing quick-opening door for medium and high pressure vessels according to claim 8, characterized in that: A handle for manually operating the rotation of the drive gear is fixed on the axle of the drive gear.

10. The pressure-bearing quick-opening door for medium and high pressure vessels according to claim 1, characterized in that: The inner end face of the door locking frame is provided with a sealing ring groove for installing a sealing ring.

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