Intelligent shielding structure for radiotherapy machine room

Abstract

The invention provides an intelligent shielding structure for a radiotherapy machine room, and belongs to the technical field of medical radiation protection. A shielding door frame; the shielding door is connected into the shielding door frame in a sliding manner; physical closing and locking actions of the shielding door and opening and closing of the warning lamp are directly and rigidly linked through mechanical driving and hydraulic transmission mechanisms, the warning lamp needs to be lighted only when the shielding door moves to a completely-closed position and the locking mechanism and the oil pressure mechanism are triggered, and the warning lamp can be turned on or turned off. The process does not depend on any electronic signal or complex logic judgment which is prone to interference, and it is guaranteed that the lamp is turned on when the door is closed and is turned off when the door is opened from the physical principle. The problem of wrong warning caused by sensor misinformation, circuit fault or program error of the intelligent shielding structure warning lamp of the radiotherapy machine room in the prior art is solved.

Description

Technical Field

[0001] This invention belongs to the field of medical radiation protection technology, specifically relating to an intelligent shielding structure for radiotherapy machine rooms. Background Technology

[0002] Radiotherapy is a key medical technology that uses high-energy rays to precisely kill tumor cells. To ensure that the radiation energy is completely confined within the treatment area, a specialized equipment room with strict radiation shielding capabilities is essential. This equipment room's shielding structure is a complete system engineering project, including not only fixed shielding walls but also dynamically opening and closing shielding doors and external warning lights indicating the structure's safety status. The shielding doors are critical moving parts of the structure, while the warning lights serve as the human-machine interface to the outside world regarding the structure's safety status. Together, they constitute a dual safety guarantee of "physical protection" and "status warning" from the shielding structure.

[0003] Most existing intelligent shielding structures in radiotherapy rooms typically use electronic sensors, such as limit switches and proximity switches, to detect the door's position and transmit the signal to the electronic control system to activate the lights. This method has significant drawbacks: the electronic signal link is susceptible to interference or damage, potentially leading to a dangerous situation where the light illuminates when the door is not fully closed, or the light remains off even when the door is locked. Furthermore, the system requires regular maintenance and may completely fail in the event of a malfunction, making it impossible to ensure a consistently reliable correspondence between the warning and physical protection status. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent shielding structure for radiotherapy rooms, which aims to solve the problems of existing intelligent shielding structures for radiotherapy rooms where the electronic signal link of the warning lights is easily interfered with or damaged, which may lead to dangerous situations where the door is not closed properly but the light turns on falsely, or the door is locked but the light does not turn on. In addition, the system requires regular maintenance and may completely fail in the event of a malfunction, making it impossible to ensure that the warning and physical protection status always reliably correspond.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A smart shielding structure for radiotherapy machine rooms, comprising: Shielding door frame; A shielding door, wherein the shielding door is slidably connected within a shielding door frame; The motor is fixedly connected to one side of the shielding door frame by bolts; A rotating rod, which is fixedly connected to the output shaft of the motor and rotatably connected inside the shielding door frame; A gear, which is fixedly connected to the circumferential surface of the rotating rod; A rack is fixedly connected to the upper end of the shielding door, and the rack meshes with a gear. Multiple movable wheels, each of which is fixedly connected to the lower end of the platform screen door; Warning light, which is fixedly connected to one side of the shielding door frame; Two door control operators are fixedly connected to both sides of the shielded door frame; A locking mechanism is provided inside the platform screen door frame to lock the platform screen door after it is closed; A hydraulic mechanism is installed inside the shielding door frame to continuously press the push button of the warning light when the shielding door is closed and locked, so that the warning light is lit to remind people outside the door that entry is prohibited.

[0006] In a preferred embodiment of the present invention, the locking mechanism includes an arrow-shaped insert, a slot, a sliding groove, a locking spring, a beveled block, an L-shaped mounting plate, and an electric push rod. The arrow-shaped insert is fixedly connected to one side of the shielding door. The slot is formed on the inner wall of one side of the shielding door frame. The sliding groove is formed on one side of the slot. One end of the locking spring is fixedly connected to the inner wall of one side of the sliding groove. The beveled block is fixedly connected to the other end of the locking spring and slidably connected within the sliding groove. The L-shaped mounting plate is fixedly connected to one side of the shielding door frame by bolts. The electric push rod is fixedly connected to one side of the L-shaped mounting plate, and the output end of the electric push rod is fixedly connected to one side of the beveled block.

[0007] In a preferred embodiment of the present invention, the hydraulic mechanism includes an installation groove, a hydraulic housing, a piston chamber, an oil reservoir, a throttling orifice, a limiting groove, a large piston, a piston rod, a first return spring, a sealing piston, a trigger block, a second return spring, and a force-bearing plate. An installation groove is formed on one inner wall of the shielding door frame. The hydraulic housing is fixedly connected to the installation groove. The piston chamber is located within the hydraulic housing. The oil reservoir is located within the hydraulic housing and communicates with the piston chamber. The throttling orifice is located at the upper end of the hydraulic housing and communicates with the oil reservoir. The limiting groove is formed on the inner circumference of the throttling orifice. The large piston is slidably connected to the piston chamber. The piston rod is fixedly connected to... At one end of the large piston, the piston rod extends out of one end of the hydraulic housing. One end of the first return spring is fixedly connected to one end of the large piston, and the other end of the first return spring is fixedly connected to the inner wall of one side of the oil reservoir. The sealing piston is slidably connected in the limiting groove. The trigger block is fixedly connected to the upper end of the sealing piston. The upper end of the trigger block is in contact with the push button of the warning light. One end of the second return spring is fixedly connected to the lower inner wall of the oil reservoir, and the other end of the second return spring is fixedly connected to the lower end of the sealing piston. Silicon-based damping oil is provided in the piston chamber and the oil reservoir. The force plate is fixedly connected to one end of the piston rod.

[0008] As a preferred embodiment of the present invention, a flush groove is provided on one side of the hydraulic housing, and the force-bearing plate matches the flush groove.

[0009] In a preferred embodiment of the present invention, one side of the arrow-shaped insert is an inclined surface, and one side of the inclined plate is also an inclined surface, wherein the inclined surface of the arrow-shaped insert and the inclined surface of the inclined plate cooperate with each other.

[0010] As a preferred embodiment of the present invention, two elastic shielding sealing plates are respectively attached to the inner walls of both sides of the shielding door frame, and the edge of the shielding door is provided with a rounded shielding flange. The shielding door is slidably connected between the two elastic shielding sealing plates.

[0011] As a preferred embodiment of the present invention, two positioning grooves are respectively opened on one side of the shielding door, and two positioning rods are respectively fixedly connected to the inner wall of one side of the shielding door frame, and the two positioning rods are respectively fitted into the two positioning grooves.

[0012] In a preferred embodiment of the present invention, a limiting ring is fixedly connected to the inner circumferential wall of the piston cavity, and the large piston is attached to one side of the limiting ring.

[0013] As a preferred embodiment of the present invention, two guide rods are fixedly connected to the inner walls of the two sides of the shielding door frame at their close ends, and the shielding door is slidably connected to the circumferential surfaces of the two guide rods.

[0014] As a preferred embodiment of the present invention, the shielding door is a multi-layer composite structure, comprising, from the inside out, an inner stainless steel plate, a main lead shielding layer, a steel structural frame, and an outer stainless steel plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention directly and rigidly links the physical closing and locking actions of the shielded door with the opening and closing of the warning light through a mechanical drive and hydraulic transmission mechanism. The warning light must be lit only when the shielded door has moved to the fully closed position and triggered the locking mechanism and the hydraulic mechanism. Finally, the trigger block presses the trigger button. This process does not rely on any easily interfered electronic signals or complex logic judgments. It ensures from a physical principle that "the light will be on when the door is closed and the light will be off when the door is open", eliminating the problem of false warnings caused by sensor false alarms, circuit failures or program errors in the intelligent shielded structure warning lights of radiotherapy machine rooms in the prior art.

[0016] 2. This invention utilizes a multi-layered composite shielding door structure combined with rounded edge shielding flanges and an elastic shielding sealing plate. When the door is closed, it effectively fills gaps, forming a continuous radiation shielding layer. Simultaneously, the cooperation of guide rods, positioning rods, and positioning grooves ensures precise centering and stable positioning of the door at its movement and closing endpoints, preventing shielding gaps caused by door offset or vibration. This integrated design of mechanical structure and shielding material not only ensures the smooth operation of the door but also fundamentally ensures the integrity and effectiveness of radiation shielding during operation, meeting the stringent requirements of radiotherapy rooms for radiation leakage.

[0017] 3. This invention features door control operators on both sides of the door frame, allowing personnel to control the opening and closing of the door from both inside and outside the machine room. The unlocking of the locking mechanism is driven by an electric push rod and can be triggered by a single button on the door control operator, simplifying the unlocking process. The hydraulic mechanism utilizes the throttling characteristics of silicon-based damping oil to ensure smooth triggering and resetting of the warning light, avoiding malfunctions. The entire system achieves a high degree of automation and safety interlocking while retaining a clear and convenient manual operation interface, meeting the convenience of daily use. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a first-view diagram of the present invention; Figure 2 This is a second perspective view in this invention; Figure 3 This is the first sectional view in this invention; Figure 4 This is a diagram showing the locking state of the locking mechanism in this invention; Figure 5 This is an exploded view of the invention; Figure 6 This is a cross-sectional view of the hydraulic mechanism in this invention; Figure 7 This is the second sectional view in this invention.

[0019] In the diagram: 1. Shielding door frame; 2. Shielding door; 3. Motor; 4. Rotating rod; 5. Gear; 6. Rack; 7. Moving wheel; 8. Door control operator; 9. Warning light; 10. Arrow-shaped plug; 11. Slot; 12. Sliding groove; 13. Locking spring; 14. Angled locking block; 15. L-shaped mounting plate; 16. Electric push rod; 17. Mounting groove; 18. Hydraulic housing; 19. Piston chamber; 20. Throttling orifice; 21. Limiting groove; 22. Large piston; 23. Piston rod; 24. First return spring; 25. Sealing piston; 26. Trigger block; 27. Force plate; 28. Flush groove; 29. ​​Elastic shielding sealing plate; 30. Positioning groove; 31. Positioning rod; 32. Limiting ring; 33. Guide rod; 34. Oil reservoir; 35. Second return spring. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0021] Please see Figures 1-7 The present invention provides the following technical solutions: A smart shielding structure for radiotherapy machine rooms, comprising: Shielding door frame 1; Shielding door 2 is slidably connected inside shielding door frame 1; Motor 3 is fixedly connected to one side of the shielding door frame 1 by bolts; Rotating rod 4 is fixedly connected to the output shaft of motor 3 and rotatably connected inside the shielding door frame 1; Gear 5 is fixedly connected to the circumferential surface of rotating rod 4; Rack 6 is fixedly connected to the upper end of the shielding door 2, and rack 6 meshes with gear 5; Multiple movable wheels 7 are fixedly connected to the lower end of the platform screen door 2; Warning light 9 is fixedly connected to one side of the shielding door frame 1; Two door control operators 8 are fixedly connected to both sides of the shielding door frame 1. A locking mechanism is provided inside the platform screen door frame 1 to lock the platform screen door 2 after it is closed; The hydraulic mechanism is installed inside the shielding door frame 1 to continuously press the push button of the warning light 9 after the shielding door 2 is closed and locked, so that the warning light 9 is lit up to remind people outside the door not to enter.

[0022] In a specific embodiment of the present invention, when the motor 3 starts, it drives the rotating rod 4 to rotate, and the gear 5 fixedly connected to the rotating rod 4 rotates accordingly. When the gear 5 rotates, it meshes with the rack 6 fixedly connected to the shielding door 2, driving the shielding door 2 and its lower moving wheel 7 to move along the shielding door frame 1, thereby realizing the opening or closing of the shielding door 2. Door control operators 8 are fixedly connected to both ends of the shielding door frame 1 to control the start and stop of the motor 3. The locking mechanism is set inside the shielding door frame 1, the hydraulic mechanism is also set inside the shielding door frame 1, and the warning light 9 is fixedly installed. A push-button is fixedly connected to one side of the shielding door frame 1. When the shielding door 2 is driven to close and reaches the locked position, the locking mechanism locks the shielding door 2. At the same time, the shielding door 2 triggers the hydraulic mechanism. When the hydraulic mechanism is triggered, its internal mechanism is displaced. When the displacement is transmitted to the end, it continuously presses the push-button of the warning light 9, causing the warning light 9 to light up and reminding people outside the door not to enter. Conversely, when the shielding door 2 is opened, the hydraulic mechanism resets, releasing the pressure on the warning light 9 button, and the warning light 9 goes out.

[0023] Please refer to the details. Figures 1-7 The locking mechanism includes an arrow-shaped insert 10, a slot 11, a sliding groove 12, a locking spring 13, a beveled block 14, an L-shaped mounting plate 15, and an electric push rod 16. The arrow-shaped insert 10 is fixedly connected to one side of the shielding door 2. The slot 11 is opened on one side of the inner wall of the shielding door frame 1. The sliding groove 12 is opened on one side of the slot 11. One end of the locking spring 13 is fixedly connected to one side of the inner wall of the sliding groove 12. The beveled block 14 is fixedly connected to the other end of the locking spring 13 and is slidably connected to the sliding groove 12. The L-shaped mounting plate 15 is fixedly connected to one side of the shielding door frame 1 by bolts. The electric push rod 16 is fixedly connected to one side of the L-shaped mounting plate 15, and the output end of the electric push rod 16 is fixedly connected to one side of the beveled block 14.

[0024] In this embodiment: when the shielding door 2 is driven to close, the arrow-shaped plug 10 on it is inserted into the slot 11 along with the door body. The inclined surface of the arrow-shaped plug 10 contacts the inclined surface of the inclined plate 14 and generates compression. When compression occurs, the inclined plate 14 is forced to compress the locking spring 13 and slide into the sliding groove 12. After the arrow-shaped plug 10 has completely slid past the inclined plate 14, the rebound force of the locking spring 13 pushes the inclined plate 14 to reset, so that it is locked into the slot of the arrow-shaped plug 10, realizing automatic mechanical locking. When it is necessary to unlock and open the shielding door 2, the operator needs to send a command through the door control operator 8. When the command is issued, the control system controls the electric push rod 16 to start and extend. The output end of the electric push rod 16 pushes the inclined plate 14 to overcome the elastic force of the locking spring 13 and completely retract into the sliding groove 12, thereby releasing the locking of the arrow-shaped plug 10, and the shielding door 2 can be driven to open.

[0025] Please refer to the details. Figures 1-7 The hydraulic mechanism includes a mounting groove 17, a hydraulic housing 18, a piston chamber 19, an oil reservoir 34, a throttling orifice 20, a limiting groove 21, a large piston 22, a piston rod 23, a first return spring 24, a sealing piston 25, a trigger block 26, a second return spring 35, and a force plate 27. The mounting groove 17 is provided on one inner wall of the shielding door frame 1. The hydraulic housing 18 is fixedly connected to the mounting groove 17. The piston chamber 19 is located within the hydraulic housing 18. The oil reservoir 34 is located within the hydraulic housing 18 and communicates with the piston chamber 19. The throttling orifice 20 is located at the upper end of the hydraulic housing 18 and communicates with the oil reservoir 34. The limiting groove 21 is located on the inner circumference of the throttling orifice 20. The large piston 22 is slidably connected to the piston chamber 19. The piston rod 23... The piston rod 23 extends out of the hydraulic housing 18 and is fixedly connected to one side of the large piston 22. One end of the first return spring 24 is fixedly connected to one side of the large piston 22, and the other end of the first return spring 24 is fixedly connected to the inner wall of the oil reservoir 34. The sealing piston 25 is slidably connected to the limiting groove 21. The trigger block 26 is fixedly connected to the upper end of the sealing piston 25, and the upper end of the trigger block 26 is in contact with the push button of the warning light 9. One end of the second return spring 35 is fixedly connected to the lower inner wall of the oil reservoir 34, and the other end of the second return spring 35 is fixedly connected to the lower end of the sealing piston 25. Silicon-based damping oil is provided in the piston chamber 19 and the oil reservoir 34. The force plate 27 is fixedly connected to one side of the piston rod 23.

[0026] In this embodiment: when the shielding door 2 is closed in place, and its side end face contacts and presses against the force plate 27, the piston rod 23 is pushed, causing the large piston 22 to slide inward in the piston chamber 19, compressing the first return spring 24, and squeezing the silicone damping oil in the piston chamber 19 and the oil reservoir 34. The oil pressure is transmitted to the bottom of the sealing piston 25 through the oil reservoir 34 and the throttle hole 20. When the oil pressure rises to a level sufficient to overcome the elastic force of the second return spring 35, it pushes the sealing piston 25 to slide upward in the limiting groove 21, and the trigger block 26 fixedly connected to it... As the pressure rises steadily, continuously pressing the button on the warning light 9 located outside the machine room will power on the warning light 9, illuminating it and issuing a clear warning to outside personnel that entry is prohibited. Conversely, when the shielding door 2 opens and the pressure on the force plate 27 is released, the first return spring 24 pushes the large piston 22 to reset, and the oil pressure drops. When the oil pressure drops below the elastic force of the second return spring 35, the elastic force of the second return spring 35 pushes the sealing piston 25 to slide downward in the limit groove 21, causing the trigger block 26 to reliably fall back, thereby releasing the button on the warning light 9 and extinguishing it.

[0027] Please refer to the details. Figures 1-7 A flush groove 28 is provided on one side of the hydraulic housing 18, and the force plate 27 is matched with the flush groove 28.

[0028] In this embodiment: when the shielding door 2 is fully open and the hydraulic mechanism is not triggered, under the action of the first return spring 24, the piston rod 23 and the force plate 27 are in the extended position. At this time, the force plate 27 protrudes beyond the opening plane of the flush groove 28 and is in the working preparation position where it can be contacted and squeezed by the movable shielding door 2. When the shielding door 2 is closed, its side contacts the protruding force plate 27 and applies pressure, the force plate 27 is pushed, which drives the piston rod 23 to retract. When the shielding door 2 is fully closed, the force plate 27 is just fully pressed into the inner cavity of the flush groove 28, and its outer surface is flush with the outer surface of the hydraulic housing 18, which effectively avoids the force plate 27 from blocking the shielding door 2 from being fully closed due to excessive protrusion.

[0029] Please refer to the details. Figures 1-7 One side of the arrow-shaped insert 10 is a slope, and one side of the sloped locking block 14 is also a slope. The slopes of the arrow-shaped insert 10 and the slopes of the sloped locking block 14 are matched.

[0030] In this embodiment: when the shielding door 2 is closed, the arrow-shaped insert 10 begins to enter the slot 11 and contacts the inclined plate block 14. The interaction between the two mating inclined plates will convert the forward linear motion of the arrow-shaped insert 10 into a component force that forces the inclined plate block 14 to retract and slide into the sliding groove 12. When this component force is applied, the inclined plate block 14 smoothly compresses the locking spring 13 and retracts, making way for the smooth insertion of the arrow-shaped insert 10. This realizes the automatic retraction and engagement of the latch, ensuring the smooth closing action.

[0031] Please refer to the details. Figures 1-7 Two elastic shielding sealing plates 29 are respectively attached to the inner walls of both sides of the shielding door frame 1. The shielding door 2 has rounded shielding flanges on its edges and is slidably connected between the two elastic shielding sealing plates 29.

[0032] In this embodiment: when the shielding door 2 slides within the shielding door frame 1 under the action of the driving mechanism, its rounded shielding flange is always slidably fitted between the two elastic shielding sealing plates 29. When the shielding door 2 is completely closed, its shielding flange is tightly fitted with the elastic shielding sealing plate 29. While providing sliding guidance, the deformation of the elastic material fills the gap, and together with the shielding layer of the door body itself, it forms a continuous radiation shielding barrier, effectively preventing radiation from leaking from the door gap.

[0033] Please refer to the details. Figures 1-7 Two positioning grooves 30 are respectively opened on one side of the shielding door 2, and two positioning rods 31 are respectively fixedly connected to the inner wall of one side of the shielding door frame 1. The two positioning rods 31 are respectively fitted into the two positioning grooves 30.

[0034] In this embodiment: when the shielding door 2 moves to a position close to being completely closed, the ends of the two positioning rods 31 begin to align and gradually embed into the two positioning slots 30 on the shielding door 2. When the shielding door 2 is completely closed, the positioning rods 31 are fully inserted into the positioning slots 30, achieving precise radial positioning of the door in the final closed position. This prevents the door from shifting slightly when locked or under pressure, ensuring the alignment of the arrow-shaped insert 10 with the slot 11 and the door sealing structure.

[0035] Please refer to the details. Figures 1-7 A limiting ring 32 is fixedly connected to the inner circumferential wall of the piston chamber 19, and the large piston 22 is attached to one side of the limiting ring 32.

[0036] In this embodiment: when the large piston 22 is pushed and slids in the piston chamber 19 by the piston rod 23, the end point of its sliding stroke is mechanically blocked by the limiting ring 32, thereby controlling the final trigger height of the trigger block 26.

[0037] Please refer to the details. Figures 1-7Two guide rods 33 are fixedly connected to the inner walls of the two sides of the shielding door frame 1 at their close ends, and the shielding door 2 is slidably connected to the circumferential surface of the two guide rods 33.

[0038] In this embodiment: when the shielding door 2 is opened or closed under the action of the motor 3, it maintains sliding contact on the circumferential surface of the two guide rods 33. The two guide rods 33 provide additional radial support and precise linear motion guidance for the shielding door 2, preventing it from swaying, jamming or uneven friction with the shielding door frame 1 during the movement, and ensuring that the door operates smoothly and reliably.

[0039] Please refer to the details. Figures 1-7 The shielding door 2 has a multi-layer composite structure, consisting of an inner stainless steel plate, a main lead shielding layer, a steel structure frame, and an outer stainless steel plate, from the inside out.

[0040] In this embodiment: the motor 3 is located at the inner end of the machine room, while the warning light 9 is located outside the machine room. From the inside to the outside, the "inside" refers to the side facing the inside of the machine room. When the shielding door 2 is closed, its internal steel frame provides the main load-bearing and rigid support. The main lead shielding layer, as the core functional layer, is responsible for absorbing and blocking the radiation generated by radiotherapy. The inner and outer stainless steel plates form a flat, sturdy, and easy-to-clean and maintain surface. When the door needs to move, its overall mechanical performance is guaranteed by the steel frame, ensuring that it can still run smoothly through the drive mechanism under heavy conditions. At the same time, the multi-layer composite structure also improves the overall rigidity and durability of the door.

[0041] The working principle and usage process of this invention: When a person presses the closing command on any door control operator 8 located on the shielded door frame 1, the door control operator 8 sends a start signal to the motor 3 located at the inner end of the machine room. When the motor 3 starts, it drives the rotating rod 4 and gear 5 to rotate. The rack 6, which meshes with the gear 5 and is fixed to the upper end of the shielded door 2, generates linear motion, causing the heavy shielded door 2 to slide along the shielded door frame 1. The moving wheel 7 at the lower end of the shielded door 2 and the guide rod 33, which may be set, work together to ensure smooth operation. The rounded shielding flange at the edge of the shielded door 2 slides synchronously between the two elastic shielding sealing plates 29 on the inner wall of the shielded door frame 1, preparing for subsequent shielding and sealing. When the shielded door 2 is close to being completely closed, the arrow fixed to its side end... Arrow-shaped insert 10 is inserted into slot 11 on the inner wall of shielding door frame 1. The inclined surface of arrow-shaped insert 10 contacts and presses against the inclined surface of inclined locking block 14 in sliding groove 12, forcing inclined locking block 14 to compress locking spring 13 and slide inward. When arrow-shaped insert 10 has completely slid past inclined locking block 14, locking spring 13 pushes inclined locking block 14 to reset and engage with the slot of arrow-shaped insert 10, realizing automatic mechanical locking. At this time, positioning groove 30 on the side of shielding door 2 also fits precisely with positioning rod 31 on shielding door frame 1, completing precise positioning. When shielding door 2 is closed to its final position, its side contacts and presses against the force plate 27 of hydraulic mechanism. Force plate 27 is pushed into the flush groove 28 of hydraulic housing 18, driving piston. Rod 23 and large piston 22 slide within piston chamber 19, compressing the first return spring 24. The movement of large piston 22 squeezes the silicone-based damping oil in piston chamber 19 and oil reservoir 34. The oil pressure is transmitted to throttle orifice 20 via oil reservoir 34. When the oil pressure rises sufficiently to overcome the elastic force of second return spring 35 in limit groove 21, it pushes sealing piston 25 upward. Trigger block 26, fixed to the upper end of sealing piston 25, rises steadily. Continuously pressing the push-button of warning light 9 located outside the machine room activates warning light 9, emitting a conspicuous "No Entry" red light warning to the area outside the machine room. Simultaneously, the stroke of large piston 22 is limited by limit ring 32, ensuring a constant trigger height. When it is necessary to open the door, personnel can pass through. When the door control operator 8 issues an opening command, the control system first activates the electric push rod 16. The electric push rod 16 extends and pushes the inclined plate block 14 inward, causing it to disengage from the slot of the arrow-shaped insert block 10, thus releasing the mechanical lock. After the mechanical lock is released, the door control operator 8 controls the motor 3 to reverse, and the gear 5 and rack 6 drive the shielding door 2 to open. As the door body leaves, the pressure on the force plate 27 disappears, the first return spring 24 pushes the large piston 22 to reset, and the oil pressure drops. When the oil pressure is lower than the elastic force of the second return spring 35, the second return spring 35 pushes the sealing piston 25 and the trigger block 26 back down, releasing the button of the warning light 9, the warning light 9 goes out, the shielding door 2 is fully opened, and the system resets to the initial state, waiting for the next cycle.

[0042] All standard parts used in this invention can be purchased from the market, and can also be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through the control unit. The control circuit of the control unit can be implemented by those skilled in the art through simple programming, which is common knowledge in the field. Therefore, the control method and circuit connection will not be explained in detail in this invention.

[0043] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An intelligent shielding structure for a radiotherapy machine room, characterized in that, include: Shielding door frame (1); A shielding door (2) is slidably connected to the shielding door frame (1); The motor (3) is fixedly connected to one side of the shielding door frame (1) by bolts; Rotating rod (4), the rotating rod (4) is fixedly connected to the output shaft of motor (3) and rotatably connected inside the shielding door frame (1); Gear (5), the gear (5) is fixedly connected to the circumferential surface of the rotating rod (4); A rack (6) is fixedly connected to the upper end of the shielding door (2), and the rack (6) meshes with a gear (5); Multiple movable wheels (7) are fixedly connected to the lower end of the shielding door (2); Warning light (9), the warning light (9) is fixedly connected to one side of the shielding door frame (1); Two door control operators (8) are fixedly connected to the two sides of the shielding door frame (1); A locking mechanism is provided inside the shielding door frame (1) to lock the shielding door (2) after it is closed; The hydraulic mechanism is installed inside the shielding door frame (1) to continuously press the button of the warning light (9) after the shielding door (2) is closed and locked, so that the warning light (9) is lit up to remind people outside the door not to enter.

2. The intelligent shielding structure for a radiotherapy room according to claim 1, characterized in that: The locking mechanism includes an arrow-shaped insert (10), a slot (11), a sliding groove (12), a locking spring (13), a beveled block (14), an L-shaped mounting plate (15), and an electric push rod (16). The arrow-shaped insert (10) is fixedly connected to one side of the shielding door (2). The slot (11) is opened on one side of the inner wall of the shielding door frame (1). The sliding groove (12) is opened on one side of the slot (11). One end of the locking spring (13) is fixedly connected to the other side of the door frame (1). The inclined plate (14) is fixedly connected to the inner wall of the sliding groove (12), and the inclined plate (14) is slidably connected to the other end of the locking spring (13). The L-shaped mounting plate (15) is fixedly connected to one side of the shielding door frame (1) by bolts. The electric push rod (16) is fixedly connected to one side of the L-shaped mounting plate (15), and the output end of the electric push rod (16) is fixedly connected to one side of the inclined plate (14).

3. The intelligent shielding structure for a radiotherapy room according to claim 2, characterized in that: The hydraulic mechanism includes a mounting groove (17), a hydraulic housing (18), a piston chamber (19), an oil reservoir (34), a throttle orifice (20), a limiting groove (21), a large piston (22), a piston rod (23), a first return spring (24), a sealing piston (25), a trigger block (26), a second return spring (35), and a force plate (27). The inner wall of one side of the shielding door frame (1) has a mounting groove (17), and the hydraulic housing (18) is fixedly connected to the shielding door frame. Within the mounting groove (17), the piston chamber (19) is located within the hydraulic housing (18), the oil reservoir (34) is located within the hydraulic housing (18), and the oil reservoir (34) communicates with the piston chamber (19). The throttling orifice (20) is located at the upper end of the hydraulic housing (18), and the throttling orifice (20) communicates with the oil reservoir (34). The limiting groove (21) is located on the inner circumferential wall of the throttling orifice (20), and the large piston (22) is slidably connected to the piston chamber (19). Inside, the piston rod (23) is fixedly connected to one side of the large piston (22), and the piston rod (23) extends out of one side of the hydraulic housing (18). One end of the first return spring (24) is fixedly connected to one side of the large piston (22), and the other end of the first return spring (24) is fixedly connected to one side of the inner wall of the oil reservoir (34). The sealing piston (25) is slidably connected in the limiting groove (21), and the trigger block (26) is fixedly connected to the sealing piston. The upper end of the sealing piston (25) is attached to the upper end of the trigger block (26) and the push button of the warning light (9). One end of the second reset spring (35) is fixedly connected to the lower inner wall of the oil reservoir (34), and the other end of the second reset spring (35) is fixedly connected to the lower end of the sealing piston (25). Silicon-based damping oil is provided in the piston chamber (19) and the oil reservoir (34). The force plate (27) is fixedly connected to one side of the piston rod (23).

4. The intelligent shielding structure for a radiotherapy room according to claim 3, characterized in that: The hydraulic housing (18) has a flush groove (28) on one side end, and the force plate (27) matches the flush groove (28).

5. The intelligent shielding structure for a radiotherapy room according to claim 4, characterized in that: One side of the arrow-shaped insert (10) is a slope, and one side of the sloped card block (14) is also a slope. The slopes of the arrow-shaped insert (10) and the slopes of the sloped card block (14) are matched.

6. The intelligent shielding structure for a radiotherapy room according to claim 5, characterized in that: The inner walls of the two sides of the shielding door frame (1) are respectively fitted with two elastic shielding sealing plates (29), and the edge of the shielding door (2) is provided with a rounded shielding flange. The shielding door (2) is slidably connected between the two elastic shielding sealing plates (29).

7. The intelligent shielding structure for a radiotherapy room according to claim 6, characterized in that: Two positioning grooves (30) are respectively opened on one side of the shielding door (2), and two positioning rods (31) are respectively fixedly connected to the inner wall of one side of the shielding door frame (1). The two positioning rods (31) are respectively fitted into the two positioning grooves (30).

8. The intelligent shielding structure for a radiotherapy machine room according to claim 7, characterized in that: A limiting ring (32) is fixedly connected to the inner circumference of the piston cavity (19), and the large piston (22) is attached to one side of the limiting ring (32).

9. The intelligent shielding structure for a radiotherapy room according to claim 8, characterized in that: Two guide rods (33) are fixedly connected to the inner walls of the two sides of the shielding door frame (1) at their close ends, and the shielding door (2) is slidably connected to the circumferential surface of the two guide rods (33).

10. The intelligent shielding structure for a radiotherapy room according to claim 9, characterized in that: The shielding door (2) is a multi-layer composite structure, consisting of an inner stainless steel plate, a main lead shielding layer, a steel structure frame, and an outer stainless steel plate, from the inside out.

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