Automatic retractable track cover for compact fusion device bioshield door

Abstract

The application discloses an automatic retractable track protection cover plate for a biological shielding door of a compact fusion device, and belongs to the technical field of nuclear facility protection equipment. The compact transmission structure formed by multiple hinge plates and pin shafts realizes efficient use of vertical space within a limited floor thickness, and solves the problems of large space occupation, unstable support, and inability to linkage of a traditional cover plate. The cover plate is linked and controlled with the biological shielding door: when the door is closed, the cover plate is automatically lifted to cover the track pit, providing protection; when the door is opened, the cover plate is automatically lowered to be flush with the ground, ensuring smooth transportation. The cover plate adopts a layered structure, and has strong bearing capacity and safe passing. The overall structure of the application is standardized, has high automation degree, and is easy to maintain, and is suitable for nuclear facilities scenes such as compact fusion devices which have strict requirements on space and safety.

Description

Technical Field

[0001] This invention belongs to the technical field of nuclear facility protection equipment, specifically relating to an automatic retractable track-mounted protective cover for a compact fusion device biological shielding door. Background Technology

[0002] In the construction of compact fusion experimental devices (such as the BEST project), the bio-shielded door, as a key piece of equipment for nuclear safety protection, relies on the precise operation of the lower door track for opening and closing. To meet the door's movement requirements, the track installation area needs to form a certain depth of installation pit with the ground; however, this structure has significant technical drawbacks:

[0003] 1. When the platform screen door is open, the track installation pit creates a ground depression, which prevents transport vehicles (such as forklifts and transfer platforms) from passing smoothly, seriously affecting equipment transportation and construction efficiency;

[0004] 2. Traditional protective covers mostly adopt an integral structure, which occupies a large vertical space during the opening and closing process. If they are adapted to the thickness of the floor slab, they cannot achieve stable support. If the support strength is guaranteed, the thickness of the floor slab concrete will be reduced, affecting the load-bearing performance of the floor slab.

[0005] 3. The existing cover plate and platform screen door have poor linkage and coordination, and are mostly controlled manually, which results in operation lag and lacks precise protection of track position. The platform screen door is prone to malfunction due to foreign object intrusion or cover plate misalignment.

[0006] 4. Conventional hinge structures occupy a large amount of space in the vertical direction, making it impossible to achieve smooth lifting and reliable locking of the cover plate within the limited floor slab thickness, and making it difficult to balance structural compactness and safety of use.

[0007] Therefore, there is an urgent need for a compact and automated track protection cover to solve the space occupation problem when the floor thickness is limited, while achieving coordinated operation with the platform screen door to ensure smooth passage and equipment safety. Summary of the Invention

[0008] To address the problems of large vertical space occupation of integral manual cover plates leading to limited floor slab adaptability, low manual operation efficiency, inability to coordinate with platform screen doors, and poor closure flatness affecting passage; the problems of simple folding cover plates due to unreasonable hinge design resulting in insufficient vertical compression, poor support stability, easy load deformation, and lack of track protection function; and the problems of excessively thick electric lifting cover plates, which severely encroach on floor slab space and affect load bearing capacity, have complex lifting mechanisms leading to increased maintenance costs, and are difficult to guarantee in terms of coordinated control accuracy with platform screen doors, this invention provides a compact automatic retractable track protection cover for biological platform screen doors of fusion devices. Through the compact design of hinges and pins, it achieves safe protection of the track installation pit and smooth switching of the transportation channel without occupying too much floor slab thickness, ensuring the operating accuracy of the platform screen door and the safety of transportation operations.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] An automatic retractable track protective cover for a compact bio-shielding door of a fusion device includes a cover body module, multiple compact hinge transmission assemblies, multiple linkage drive mechanisms, and a positioning support assembly. The positioning support assembly is fixed to the side wall of the track installation pit and the ground foundation. The compact hinge transmission assemblies are hinged to the support plates of the positioning support assembly. The cover body module is fixedly connected to the upper end of the compact hinge transmission assembly. One end of the linkage drive mechanism is fixed to the end support of the positioning support assembly, and the other end is connected to the compact hinge transmission assembly for transmission, realizing the unfolding and folding of the cover body module in a limited space and signal linkage with the bio-shielding door control system. The compact hinge transmission assembly includes multiple cross-hinged hinge plates, a pin assembly passing through the mating holes of the hinge plates, and a copper sleeve embedded in the mating holes of the hinge plates and mating with the pin assembly. The end of the pin assembly is provided with an anti-rotation and locking structure.

[0011] Beneficial effects:

[0012] 1. This invention uses a combination structure of multiple hinge plates and pins to significantly reduce the space occupied in the vertical direction, and achieves stable opening and closing of the cover plate without affecting the load-bearing capacity of the floor slab, perfectly adapting to the building structure requirements of compact fusion devices.

[0013] 2. This invention achieves linkage control with the biological shielding door. When the door is closed, the cover plate automatically rises to the protective track, and when the door is opened, the cover plate automatically falls to the ground level, without the need for manual intervention, ensuring smooth transportation channels.

[0014] 3. After the cover plate of the present invention is lowered, it fits precisely with the ground, preventing foreign objects from entering the track installation pit during transportation. At the same time, the rigid connection between the hinge and the pin ensures the accuracy of the track position and guarantees the safe and stable operation of the shielding door.

[0015] 4. The present invention uses hinge plates, pins and load-bearing components made of Q235B high-strength material, combined with multiple sets of support structure design, the cover plate has strong load-bearing capacity, can meet the passage requirements of various transportation vehicles, and runs smoothly without shaking.

[0016] 5. The overall structure of this invention is based on standardized material design, with strong component versatility, easy installation and debugging, low maintenance cost, and adaptability to the long-term stable operation requirements of nuclear facilities. Attached Figure Description

[0017] Figure 1a This is an overall schematic diagram of the automatic retractable track protective cover plate for the compact fusion device bio-shielding door of the present invention;

[0018] Figure 1b This is a top view of the automatic retractable track protective cover for the compact fusion device bio-shielding door of the present invention.

[0019] Figure 2 This is an overall schematic diagram of the automatically retractable track protective cover plate for the bio-shielding door of the compact fusion device of the present invention in the open state;

[0020] Figure 3 This is an overall schematic diagram of the automatically retractable track protective cover plate for the bio-shielding door of the compact fusion device of the present invention in the closed state;

[0021] Figure 4a This is a schematic diagram of a compact hinge drive assembly.

[0022] Figure 4b A schematic diagram of the pin shaft of a compact hinge drive assembly;

[0023] Figure 5 A schematic diagram of the installation of the positioning support components;

[0024] Figure 6 This is a schematic diagram of a linkage drive mechanism;

[0025] Figure 7a This is the front view of the main module of the cover plate;

[0026] Figure 7b This is a top view of the main module of the cover plate;

[0027] Figure 7c This is a schematic diagram of a load-bearing plate;

[0028] Figure 8 This is a schematic diagram of a hinge plate assembly;

[0029] Figure 9 This is a schematic diagram showing the positions of the compact hinge transmission assembly and the linkage drive mechanism;

[0030] Figure 10This is a schematic diagram of a push rod motor.

[0031] The attached figures are labeled as follows: 1. Cover plate main module; 11. Load-bearing plate; 12. Horizontal grid plate; 13. Vertical grid plate; 14. Patterned steel plate panel; 2. Compact hinge transmission assembly; 21. Hinge plate assembly; 22. Pin assembly; 211. First hinge plate; 212. Second hinge plate; 213. Third hinge plate; 214. Fourth hinge plate; 215. Fifth hinge plate; 221. First pin; 222. Second pin; 223. Third pin; 224. First pin with hole; 225. Second pin with hole; 226. Fourth pin; 227. Fifth pin; 228. Copper sleeve; 23. Anti-rotation and locking structure; 231. Anti-rotation cover; 232. Spring washer; 233. Flat washer; 234. Socket head cap screw; 3. Linkage drive mechanism; 31. Drive power unit; 32. Transmission connection assembly; 311. Push rod motor; 312. Motor bracket; 3121. First short support sleeve; 3122. Long support sleeve; 3123. Connecting pipe; 3124. End plate; 321. Pull rod; 322. First pull rod support; 323. Second pull rod support; 324. Connecting rod shaft; 4. Positioning support assembly; 41. End support; 411. Angle steel; 412. Third hinge support plate; 413. Motor connecting rod shaft; 414. First hinge support plate; 415. Second hinge support plate; 42. Middle support; 43. Support sleeve assembly; 431. Support sleeve; 432. Second short support sleeve. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0033] like Figure 1a , Figure 1b , Figure 2 , Figure 3As shown, an automatic retractable track protective cover for a compact fusion device bio-shielding door according to the present invention includes a cover main module 1, multiple compact hinge transmission components 2, multiple linkage drive mechanisms 3, and a positioning support component 4. These components work together to achieve track protection and passage switching functions. The positioning support component 4 is fixedly installed on the side wall of the track installation pit and the ground foundation, providing fixed support and installation reference, serving as the core load-bearing foundation. The track installation pit is the recessed area for installing the door track below the compact fusion device bio-shielding door, a ground depression area designed to accommodate the operation of the shielding door. Multiple compact hinge transmission components 2 are hinged to the support plate of the positioning support component 4, providing the core transmission structure for the lifting and lowering of the cover plate, realizing the motion conversion of folding / unfolding. The main body module 1 of the cover plate is fixed to the upper end of the multiple compact hinge transmission components 2 by welding and bolting, and moves vertically up and down with the movement of the compact hinge transmission components 2 to complete the track protection and channel laying. The compact hinge transmission components 2 are symmetrically arranged on both sides and the middle position of the lower surface of the main body module 1 of the cover plate. This arrangement can ensure that the force is evenly distributed when the cover plate is lifted and lowered, avoiding unilateral deformation. One end of multiple linkage drive mechanisms 3 is fixed to the end support 41 of the positioning support component 4, and the other end is respectively connected to the multiple compact hinge transmission components 2 to provide power output for the device. At the same time, it is linked with the biological shielding door control system to realize automated control. The main body module 1 of the cover plate, the multiple compact hinge transmission components 2, the multiple linkage drive mechanisms 3, and the positioning support component 4 work together to complete the function of protecting the track installation pit and smoothly switching the transportation channel.

[0034] like Figure 2 As shown, when the cover plate is in the lowered / open state, the main body module 1 of the cover plate is flush with the ground, the compact hinge transmission component 2 is in the unfolded state, and the push rod motor 311 of the linkage drive mechanism 3 is in the retracted state. At this time, the track mounting pit is covered by the cover plate, forming a smooth transportation channel.

[0035] like Figure 3 As shown, when the cover is in the raised / closed state, the main body module 1 of the cover is raised vertically to completely cover the track mounting pit, the compact hinge transmission component 2 is in a folded state, and the push rod motor 311 of the linkage drive mechanism 3 will be in an extended state, thus achieving safety protection for the track mounting pit.

[0036] like Figure 7a , Figure 7b , Figure 7cAs shown, the main module 1 of the cover plate includes a load-bearing plate 11, a transverse grid plate 12, a longitudinal grid plate 13, and a patterned steel plate panel 14. It adopts a layered, stacked structure. The bottom layer is the load-bearing plate 11, serving as the core load-bearing foundation. The upper surface of the load-bearing plate 11 is fully covered with and welded to the middle layer of transverse and longitudinal grid plates 12 and 13. The transverse and longitudinal grid plates 12 and 13 are welded perpendicularly to each other to form a grid-like reinforcing structure. The top layer is the patterned steel plate panel 14, welded to the upper surface of the transverse and longitudinal grid plates 12 and 13, forming the passage surface of the cover plate. The dimensions of the main module 1 of the cover plate are customized according to the actual dimensions of the track installation pit, ensuring that it is flush with the ground when lowered and completely covers the track installation pit when raised.

[0037] Preferably, the load-bearing plate 11, the horizontal grid plate 12, and the vertical grid plate 13 are made of Q235B material to ensure structural strength, and the surface of the patterned steel plate panel 14 is treated with anti-slip material to ensure passage safety.

[0038] Preferred, such as Figure 4a , Figure 4b , Figure 9 As shown, the compact hinge transmission assembly 2 includes multiple sets of cross-arranged hinge plate assemblies 21 and pin shaft assemblies 22. A copper sleeve 228 is provided at the mating point of the hinge plate assembly 21 and the pin shaft assembly 22, and it is equipped with an anti-rotation pressure cover 231 and an anti-rotation and locking structure 23.

[0039] Specifically, the hinge plate assembly 21 is the core moving component, comprising multiple hinge plates that are cross-hinged by the pin assembly 22 to form a foldable / unfoldable linkage mechanism; the copper sleeve 228 is embedded in the pin mating hole of the hinge plate, and the pin assembly 22 is inserted into the copper sleeve 228 to realize the flexible rotation of the hinge plate; the anti-rotation and locking structure 23 is installed at the end of the pin assembly 22 and fits tightly against the outer wall of the hinge plate to realize the axial fixation, anti-rotation and anti-loosening locking of the pin. The three work together to form the complete transmission of the compact hinge transmission assembly 2.

[0040] Specifically, such as Figure 8 As shown, the hinge plate assembly 21 includes a first hinge plate 211, a second hinge plate 212, a third hinge plate 213, a fourth hinge plate 214, and a fifth hinge plate 215. The first hinge plate 211 and the second hinge plate 212 are hinged at their middle parts by a pin to form a first-level cross linkage structure. One end of the third hinge plate 213 is hinged to the upper end of the second hinge plate 212, and the other end is hinged to the middle part of the fourth hinge plate 214. One end of the fifth hinge plate 215 is hinged to the upper end of the first hinge plate 211, and the other end is hinged to the lower end of the fourth hinge plate 214. The five hinge plates are cross-hung at multiple levels by pins to form a foldable / unfoldable linkage mechanism, realizing vertical spatial compression and lifting transmission.

[0041] Preferably, all hinge plates are made of Q235B material and galvanized to enhance corrosion resistance; multiple sets of hinge plates are arranged at a specific angle and connected by pins to achieve rotation, which greatly reduces the vertical transmission space.

[0042] like Figure 4a As shown, the pin assembly 22 includes a first pin 221 with a length of 128mm, a second pin 222 with a length of 176mm, a third pin 223 with a length of 192mm, a first perforated pin 224 with a length of 128mm, a second perforated pin 225 with a length of 270mm, and a fourth pin 226, which is a type B 24×160 (Type B is the national standard model number of the pin, representing a specific pin structure specification; 24 is...). The diameter of the pin is in millimeters; 160 is the length of the pin, in millimeters; that is, type B 24×160 indicates a national standard type B pin with a diameter of 24mm and a length of 160mm), the 5th pin is 227, type B 24×180 (type B 24×180 is a national standard type B pin with a diameter of 24mm and a length of 180mm), the material is made of No. 35 steel or No. 45 steel to ensure transmission rigidity; a copper sleeve 228 is set at the joint between the pin and the hinge plate to reduce wear and improve rotation flexibility.

[0043] like Figure 4b As shown, the anti-rotation and locking structure 23 includes an anti-rotation pressure cover 231, a spring washer 232, and a flat washer 233, which are fixed by an internal hexagon head screw 234 to prevent the pin shaft from rotating or loosening and to ensure transmission accuracy. The flat washer 233 is fitted snugly at the end shoulder of the pin shaft assembly 22, serving as a basic buffer and fitting component; the spring washer 232 is fitted on the outside of the flat washer 233, playing a role in preventing loosening and damping; the anti-rotation pressure cover 231 completely covers the outside of the spring washer 232 and fits tightly against the outer wall of the hinge plate, restricting the rotation of the pin shaft; the internal hexagon head screw 234 passes through the anti-rotation pressure cover 231, the spring washer 232, and the flat washer 233 in sequence, and then is fastened to the threaded hole at the end of the pin shaft, realizing axial locking and circumferential anti-rotation of the pin shaft.

[0044] like Figure 5 , Figure 6 , Figure 9 As shown, the linkage drive mechanism 3 includes a drive power unit 31 and a transmission connection assembly 32. The drive power unit 31 is fixedly installed on the end support 41 of the positioning support assembly 4 via a motor bracket 312, serving as the power output end. The push rod output end of the drive power unit 31 is hinged to one end of the transmission connection assembly 32, and the other end of the transmission connection assembly 32 is hinged to the hinge plate assembly 21 of the compact hinge transmission assembly 2. The linear motion output by the drive power unit 31 is converted into the rotational motion of the compact hinge transmission assembly 2 through the transmission connection assembly 32, realizing the transmission of power and the conversion of motion form.

[0045] The drive power unit 31 employs a push rod motor 311, which is fixedly installed via a motor bracket 312. The motor bracket 312 is a welded component, consisting of a first short support sleeve 3121, a long support sleeve 3122, a connecting pipe 3123, and an end plate 3124, ensuring stable motor installation. The connecting pipe 3123 serves as the main horizontal support component of the motor bracket 312; the first short support sleeve 3121 and the long support sleeve 3122 are vertically welded to the lower surface of the connecting pipe 3123, forming vertical support feet for fitting against the installation foundation and distributing stress; the end plate 3124 is welded to both ends of the connecting pipe 3123 and is bolted to the end support 41 of the positioning support assembly 4, achieving overall fixation of the motor bracket 312; the push rod motor 311 is horizontally installed on the upper surface of the connecting pipe 3123, completing the fixation of the power unit. The push rod motor 311 is signal-linked with the biological shielding door control system to achieve synchronous operation.

[0046] like Figure 5 , Figure 6 As shown, the transmission connection assembly 32 includes a pull rod 321, a first pull rod support 322, a second pull rod support 323, and a connecting shaft 324. The first pull rod support 322 is welded and fixed to the end of the output shaft of the push rod motor 311, and moves linearly with the push rod motor 311; the second pull rod support 323 is welded and fixed to the middle of the third hinge plate 213 of the compact hinge transmission assembly 2, serving as the power receiving end; one end of the pull rod 321 is hinged to the first pull rod support 322 via the connecting shaft 324, and the other end is hinged to the second pull rod support 323 via another connecting shaft 324; the hinge structure converts the linear extension and retraction motion of the push rod motor 311 into the rotational motion of the hinge plate, and the linear motion of the push rod motor 311 into the rotational motion of the compact hinge transmission assembly 2, thereby realizing the lifting and lowering of the cover plate; preferably, all transmission components are made of Q235B material to ensure stable power transmission.

[0047] like Figure 6 , Figure 9 As shown, the positioning support assembly 4 includes an end support 41, a middle support 42, and a support sleeve assembly 43. The end supports 41 are symmetrically fixed to the pit sidewalls at both ends of the track installation pit, and the middle support 42 is fixed to the pit sidewall in the middle of the track installation pit. The two are the basic fixed supports for the entire positioning support assembly 4. The support sleeve assembly 43 is embedded in the mating holes of the first hinge support plate 414 and the second hinge support plate 415 of the end supports 41 and the middle support 42. The pin assembly 22 of the compact hinge transmission assembly 2 is inserted into the support sleeve assembly 43 to realize the hinge support of the compact hinge transmission assembly 2. At the same time, the support sleeve assembly 43 restricts the vertical displacement of the compact hinge transmission assembly 2 to ensure transmission accuracy.

[0048] like Figure 6 , Figure 10 As shown, the end supports 41 are symmetrically arranged at both ends of the track mounting pit, providing fixed support points for the compact hinge transmission assembly 2. They include an angle steel 411, a third hinge support plate 412, a motor connecting rod shaft 413, a first hinge support plate 414, a second hinge support plate 415, and a pad. The angle steel 411 serves as the basic mounting component of the end supports 41, vertically fixed to the pre-embedded steel plate on the side wall of the track mounting pit. The third hinge support plate 412 is welded to the angle steel 41. On the inner side, it is connected to the first hinge support plate 414 and the second hinge support plate 415, and is used to hinge the hinge transmission assembly and provide rotational support; the motor connecting rod shaft 413 is welded to the outer wall of the angle steel 411, located above the hinge support plate, and is used to connect the linkage drive mechanism 3 to transmit power; the first hinge support plate 414 and the second hinge support plate 415 are welded to the inner side of the angle steel 411 in parallel and perpendicular to each other, providing a hinge installation reference for the compact hinge transmission assembly 2.

[0049] The central support 42 is located in the middle of the track mounting pit, and the overall support stability is enhanced by the first hinge support plate 414 and the second hinge support plate 415.

[0050] The support sleeve assembly 43 includes a support sleeve 431 and a second short support sleeve 432, which are installed at the hinge joint of the pin assembly 22 and the hinge plate assembly 21 to ensure uniform force transmission and limit vertical displacement, thereby ensuring the accuracy of the cover plate opening and closing.

[0051] Preferably, all support components are made of Q235B material.

[0052] This invention achieves linkage control with the biological shielding door. When the biological shielding door is closed, the push rod motor 311 drives the compact hinge transmission assembly 2 to lift and lock the cover plate, covering the track installation pit. When the biological shielding door is opened, the push rod motor 311 drives the compact hinge transmission assembly 2 to lower the cover plate, making it flush with the ground to form a transport channel. The entire process is automated and requires no manual intervention.

[0053] Specifically, the working process of the automatic retractable track protective cover plate for a compact fusion device bio-shielding door of the present invention is as follows:

[0054] First, initial installation is performed. The main cover module 1 is assembled according to the dimensions of the track installation pit. Based on the actual length of the track installation pit, multiple load-bearing plates 11 are spliced ​​together. The splicing joints are beveled and reinforced with additional plates to ensure the integrity of the underlying load-bearing structure. On the upper surface of the assembled load-bearing plates 11, horizontal grid plates 12 are welded at intervals, and then vertical grid plates 13 are welded perpendicular to the horizontal grid plates 12 to form a grid-like reinforcement layer. Finally, a patterned steel plate panel 14 is fully laid on and welded onto the upper surface of the grid plate layer. After the overall assembly is completed, flatness correction is performed to ensure that the cover is flush with the ground when it is lowered. The compact hinge transmission assembly 2 is then connected and fixed to the main cover module 1 and the positioning support assembly 4. The linkage drive mechanism 3 is installed and a signal connection is established with the biological shielded door control system. The positions of each component are adjusted to ensure that the cover is flush with the ground when it is lowered and accurately covers the track installation pit when it is raised.

[0055] Specifically, the working linkage control logic of the automatic retractable track protective cover plate for a compact fusion device biological shielding door of the present invention is as follows:

[0056] (1) Cover plate lifting process: When the biological shielding door receives the closing command, the biological shielding door control system synchronously sends an action signal to the push rod motor 311. The push rod motor 311 drives the pull rod 321 to extend and retract. Through the first pull rod support 322, the first pull rod support 322 moves linearly with the output shaft of the push rod motor 311, directly driving the connecting rod shaft 324 to move. Then, through the pull rod 321, the power is transmitted to the second pull rod support 323, driving the connecting rod shaft 324 to move, thereby driving the first hinge plate 211, the second hinge plate 212, the third hinge plate 213, the fourth hinge plate 214, and the fifth hinge plate 215. The five hinge plates rotate synchronously through the pin shaft linkage. The main body module 1 of the cover plate rises in the vertical direction until it completely covers the track installation pit. The anti-rotation pressure cover 231 and the anti-rotation and locking structure 23 automatically lock, completing the switching of the protection state.

[0057] (2) Cover plate falling process: When the bio-shielded door receives the opening command, the bio-shielded door control system sends a reverse action signal. The push rod motor 311 drives the compact hinge transmission assembly 2 to move in the opposite direction. The first hinge plate 211, the second hinge plate 212, the third hinge plate 213, the fourth hinge plate 214, and the fifth hinge plate 215 rotate in the opposite direction around the first pin 221, the second pin 222, and the third pin 223. The cover plate main module 1 falls smoothly, and the patterned steel plate panel 14 fits precisely with the ground to form a flat transportation channel. The support sleeve 431 provides stable support to ensure the load-bearing capacity of the cover plate.

[0058] (3) Safety Assurance: In the cooperation between the compact hinge transmission assembly 2 and the first pin 221, the second pin 222, and the third pin 223, the first pin 221, the second pin 222, and the third pin 223 all cooperate with the copper sleeve 228 to ensure smooth and unobstructed lifting process. The copper sleeve 228 reduces component wear. The end support 41 and the middle support 42 together form the positioning and support base of the cover plate, ensuring the positional stability of the cover plate. The anti-rotation and locking structure 23 ensures that the cover plate does not shift or loosen in the protected state by locking the pins, ensuring the positional stability of the cover plate in the protected state, avoiding displacement due to vibration, and ensuring that the biological shielding door track is not invaded by foreign objects.

[0059] Preferably, the materials of the first hinge plate 211, the second hinge plate 212, the third hinge plate 213, the fourth hinge plate 214, and the fifth hinge plate 215 can be replaced with carbon fiber composite materials to further reduce the weight of the components, reduce the load on the drive motor, while maintaining structural strength and extending the service life of the equipment.

[0060] Preferably, the push rod motor 311 can be replaced with a servo motor, which, together with a servo driver, enables precise control of the lifting speed and position of the cover plate, adapting to the operating requirements under different working conditions.

[0061] Preferably, the copper sleeve 228 can be replaced with a self-lubricating bearing to reduce maintenance frequency, improve component wear resistance, and meet the reliability requirements for long-term operation of nuclear facilities.

[0062] Preferably, a wireless communication module can be added to support remote monitoring and fault diagnosis, thereby improving the system's intelligence level.

[0063] Preferably, the patterned steel plate panel 14 can be replaced with an anti-slip rubber pad or an anti-corrosion alloy plate to meet the traffic safety and corrosion prevention needs in different environments.

[0064] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A compact fusion device bioshield door automatic retractable rail shield cover characterized by, The system includes a cover plate main module, multiple compact hinge transmission assemblies, multiple linkage drive mechanisms, and a positioning support assembly. The positioning support assembly is fixed to the pit sidewall and ground foundation of the track installation pit. The compact hinge transmission assemblies are hinged to the support plates of the positioning support assembly. The cover plate main module is fixedly connected to the upper end of the compact hinge transmission assembly. One end of the linkage drive mechanism is fixed to the end support of the positioning support assembly, and the other end is connected to the compact hinge transmission assembly to realize the unfolding and folding of the cover plate main module in a limited space and to be linked with the biological shielding door control system. The compact hinge transmission assembly includes multiple cross-hinged hinge plates, pin assemblies passing through the mating holes of the hinge plates, and copper sleeves embedded in the mating holes of the hinge plates and mating with the pin assemblies. The end of the pin assembly is provided with an anti-rotation and locking structure.

2. A compact fusion device bioshield door automatic stowaway track cover according to claim 1, wherein, The main module of the cover plate includes a bottom load-bearing plate, a middle layer of horizontal and vertical grid plates welded perpendicularly to each other, and a top layer of patterned steel plate panel welded to the upper surface of the horizontal and vertical grid plates.

3. A compact fusion device bioshield door automatic stowaway track cover according to claim 1, wherein, The hinge plates are multiple cross-hinged, including hinge plates 1 through 5.

4. An automatic retractable track shield door for a compact fusion device biological shield door according to claim 1, wherein The anti-rotation and locking structure includes a flat washer, a spring washer, and an anti-rotation pressure cap that are sequentially fitted onto the pin end of the pin assembly, and are connected to the threaded hole at the pin end of the pin assembly by an internal hexagonal head screw.

5. A compact fusion device bio-shield door automatic stowable track cover according to claim 3, wherein, The first hinge plate is hinged to the middle of the second hinge plate. One end of the third hinge plate is hinged to the upper end of the second hinge plate and the other end is hinged to the middle of the fourth hinge plate. One end of the fifth hinge plate is hinged to the upper end of the first hinge plate and the other end is hinged to the lower end of the fourth hinge plate.

6. An automatic retractable track shield door for a compact fusion device biological shield door according to claim 1, wherein The linkage drive mechanism includes a push rod motor, a motor bracket for fixing the push rod motor, and a pull rod with one end hinged to the output end of the push rod motor and the other end hinged to the hinge plate in the compact hinge transmission assembly.

7. An automatic retractable track shield door for a compact fusion device biological shield door according to claim 6, wherein The motor bracket includes a horizontally arranged connecting pipe, a first short support sleeve and a long support sleeve vertically welded to the lower surface of the connecting pipe, and end plates welded to both ends of the connecting pipe for fixed connection with the positioning support assembly.

8. An automatic retractable track shield door for a compact fusion device biological shield door according to claim 1, wherein The positioning support assembly includes end supports symmetrically fixed to the side walls at both ends of the track mounting pit, a middle support fixed to the middle side wall of the track mounting pit, and a support sleeve assembly embedded in the end supports and the middle support.

9. The automatically retractable track protective cover for a compact fusion device bio-shielding door according to claim 8, characterized in that, The end support includes an angle steel vertically fixed to the side wall of the track mounting pit, a hinge support plate welded to the inside of the angle steel, and a motor connecting rod shaft welded to the outside of the angle steel for connecting the linkage drive mechanism.

10. An automatic retractable track shield door for a compact fusion device biological shield door according to claim 1, wherein Multiple compact hinge drive components are symmetrically arranged on both sides and the middle of the lower surface of the cover plate main module.

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