Radiation protection shield lead panel door

Abstract

The application discloses a kind of ray protection shield lead plate door, belong to radiation protection field, including drive mechanism, driven mechanism and oil box;Driven mechanism includes rack, rack is along the top end of door plate and is connected with door plate;Drive mechanism includes gear tube;Gear tube is located above rack, can be engaged with rack by moving down;When gear tube is engaged with rack, gear tube rotates, moves door plate by rack;Oil box is equipped with lubricating oil, located above rack;Gear tube is arranged at one side of oil box, can move towards oil box;Oil box is equipped with piston plate matched with it in, piston connecting rod is fixed in gear tube, piston connecting rod is fixed with piston plate by extending into oil box;Oil box has oil outlet valve;Gear tube moves towards oil box, piston connecting rod moves along with and pushes piston plate, and piston plate extrudes lubricating oil from oil outlet valve and falls on rack.The application can automatically lubricate gear structure, and can realize manual and electric opening and closing functions simultaneously.

Description

Technical Field

[0001] This invention belongs to the field of radiation protection and relates to a door, particularly a radiation protection shielding lead plate door. Background Technology

[0002] Lead shielding doors, also known as radiation shielding doors, lead doors, lead plate doors, or X-ray shielding doors, are used to block the passage of X-rays at entrances and exits. Industrial flaw detection exposure rooms typically house multiple X-ray machines, with several operators performing their respective tasks simultaneously. They are widely used in boiler, petrochemical, and other fields, primarily for non-destructive testing of workpiece welds. Traditional X-ray shielding lead plate doors are driven by a motor, which drives a gear transmission to open and close the door. When lubricating and maintaining the lead plate door, it is necessary to manually disassemble the gearbox and apply lubricating oil, which is cumbersome and troublesome for maintenance personnel.

[0003] For example, the utility model patent (application number: 202321813592.X) discloses a "radiation-proof self-shielding protective lead door". The description states that when existing protective lead doors are used for a long time, operators need to climb to a high place to maintain the moving mechanism of the lead door. The entire maintenance process is cumbersome and complicated, which is not conducive to the long-term operation of the lead door. Summary of the Invention

[0004] This invention provides a radiation-shielding lead plate door to overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A radiation-shielding lead plate door includes a support rail and a door panel. The top of the door panel extends into the support rail and can move along it to open and close the lead plate door. It also includes a drive mechanism, a driven mechanism, and an oil box. The driven mechanism includes a rack, which is disposed along the top of the door panel and connected to it. The drive mechanism includes a gear tube, which is a tube with teeth on its outer side. The gear tube is located above the rack and can move downwards to mesh with it. When the gear tube meshes with the rack, it rotates, driving the door panel to move via the rack. The oil box contains lubricating oil and is located above the rack. The gear tube is disposed on one side of the oil box and can move towards it. A matching piston plate is provided inside the oil box, and a piston connecting rod is fixed inside the gear tube, extending into the oil box and fixed to the piston plate. The oil box has an oil outlet valve. When the gear tube moves towards the oil box, the piston connecting rod moves accordingly, pushing the piston plate, which squeezes the lubricating oil from the oil outlet valve onto the rack.

[0007] To optimize the above technical solution, the specific measures also include:

[0008] Furthermore, the drive mechanism also includes a drive rod arranged in the front-to-back direction; the gear tube, oil box, and piston plate are all passed through by the drive rod, and the gear tube can move along the drive rod; the drive rod can move up and down and rotate; when the drive rod moves down, the gear tube moves down with it and meshes with the rack; when the drive rod rotates, it drives the gear tube to rotate; there are two gear tubes, which are respectively arranged on the front and rear sides of the oil box.

[0009] Furthermore, the drive mechanism also includes two drive plates, a guide rod, an electric push rod, and two connecting rods; the two drive plates are vertically arranged and located on the outer sides of the two gear tubes respectively, and can move inward and outward; a drive box is fixed above the support rail; the guide rod is arranged in the front-back direction, passes through the two drive plates, and is fixed inside the drive box; the electric push rod is vertically arranged, and its upper end is fixed to the guide rod; the upper ends of the two connecting rods are rotatably connected to the lower ends of the electric push rod, and their lower ends are rotatably connected to the inner sides of the two drive plates respectively; when the electric push rod retracts, the two connecting rods rotate accordingly, driving the two drive plates to move inward, and the gear tubes are pushed towards the oil box; when the electric push rod extends, the two connecting rods rotate accordingly, pushing the two drive plates to move outward.

[0010] Furthermore, a spring is fitted on the piston connecting rod inside the gear tube; when the drive plate pushes the gear tube to move towards the oil box, the spring is compressed; when the drive plate moves outward, the compressed spring pushes the gear tube and piston plate outward.

[0011] Furthermore, limit plates are fixed on the drive rod, located on the outer sides of the two gear tubes respectively.

[0012] Furthermore, the drive mechanism also includes two guide plates, a spring telescopic rod, a motor, and two pressing blocks; the two guide plates are disposed at both ends of the drive rod and are slidably connected to the drive box, allowing them to slide up and down relative to the drive box; the drive rod is rotatably connected to the guide plates, allowing it to rotate relative to the guide plates and move up and down with them; the upper end of the spring telescopic rod is fixed to the drive box, the motor is fixed to the lower end of the spring telescopic rod, and the output shaft of the motor is connected to the drive rod, driving the drive rod to rotate; the pressing blocks are wedge-shaped; the two pressing blocks are fixed to the outer sides of the two drive plates, with their inclined surfaces facing outwards; the two guide plates are respectively disposed on the outer sides of the two pressing blocks; when the two drive plates move outwards, the pressing blocks press the guide plates downwards, causing the drive rod to move the gear tube downwards, and the motor to move downwards synchronously, extending the spring telescopic rod; when the two drive plates move the pressing blocks inwards, the spring telescopic rod contracts, and the motor drives the guide plates and drive rod upwards, causing the gear tube to move upwards accordingly.

[0013] Furthermore, the rack has guide grooves on both its front and rear sides with upward openings; the bottoms of the two guide plates are respectively inserted into the two guide grooves and move up and down within the guide grooves.

[0014] Furthermore, the bottom of the guide plate and the bottom of the guide groove are respectively provided with matching concave and convex structures; when the guide plate drives the gear tube to move down to half-engage with the rack, the concave and convex structures of the bottom of the guide plate and the bottom of the guide groove do not contact each other, and the gear tube rotates to drive the rack to move; when the guide plate drives the gear tube to move down to fully engage with the rack, the concave and convex structures of the bottom of the guide plate and the bottom of the guide groove insert into each other, and the gear tube and the rack are fixed.

[0015] Furthermore, a connecting groove is fixed at the top of the door panel; the opening of the connecting groove faces upward and has a rack adjustment hole penetrating its front and rear groove walls; a horizontal connecting plate and a vertical connecting plate are provided inside the connecting groove; two guide grooves are respectively located on the front and rear sides of the connecting groove; the horizontal connecting plate passes through the rack adjustment hole and is fixed to the two guide grooves on its front and rear sides respectively; the rack is fixed above the horizontal connecting plate by the vertical connecting plate; the rack is fixed to the two guide grooves by the vertical connecting plate and the horizontal connecting plate to form an integral adjustment structure, and the adjustment structure can move up and down along the rack adjustment hole; the bottom edge of the side wall of the support rail is bent inward to form a support plate; the support plate is equipped with several support bolts; the support bolts are vertically set and threadedly connected to the support plate, with their upper ends abutting against the bottom surface of the guide groove; rotating the support bolts causes them to move up and down relative to the support plate, and the adjustment structure moves up and down within the range of the rack adjustment hole accordingly.

[0016] Furthermore, a frame is fixed around and at the bottom of the rack; the oil box also has an oil injection valve.

[0017] The beneficial effects of this invention are as follows:

[0018] I. In order to solve the problem that in the existing technology, when lubricating and maintaining lead plate doors, it is necessary to manually disassemble the gearbox to apply lubricating oil, which is cumbersome and troublesome for maintenance personnel. The present invention sets up an electric push rod and a connecting rod to drive two drive plates to move closer to each other, squeeze the gear tube to the oil box, and push the piston plate to move through the push rod to squeeze out the lubricating oil, so that the lubricating oil is sprayed between the gear tube and the rack, which facilitates lubrication and maintenance and extends the service life of the fixing device.

[0019] Second, this invention controls the guide plate to move downwards via a drive plate and a pressing block, thereby enabling the gear tube between them to move downwards and mesh with the rack. Simultaneously, guide grooves are provided on both sides of the rack to allow the guide plate to extend into, thus limiting the movement of the door panel and preventing it from detaching from the support rail. Furthermore, the interlocking structure between the guide plate and the guide groove enables the locking function of the lead-plate door.

[0020] Third, this invention achieves rack height adjustment by setting rack adjustment holes on the connecting structure and support bolts on the support rail. When the motor is damaged and the door needs to be opened in time, the rack height can be adjusted to disengage the rack from the gear tube, thus achieving forced door opening. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the external structure of the radiation protection shielding lead plate door of the present invention;

[0022] Figure 2 This is a schematic diagram of the external structure of the radiation protection shielding lead plate door of the present invention from another perspective;

[0023] Figure 3 This is a schematic diagram of the structure of the radiation protection shielding lead plate door of the present invention, showing the removal of the drive box and the top surface of the support rail;

[0024] Figure 4 This is a schematic diagram of the drive mechanism and oil box of the radiation protection shielding lead plate door of the present invention;

[0025] Figure 5 This is a cross-sectional structural schematic diagram of the gear tube and oil box of the radiation protection shielding lead plate door of the present invention.

[0026] Figure 6 This is a schematic diagram of the driven mechanism and part of the driving mechanism of the radiation protection shielding lead plate door of the present invention;

[0027] Figure 7 This is a schematic diagram of the guide plate and protrusion of the radiation protection shielding lead plate door of the present invention;

[0028] Figure 8 This is a side cross-sectional schematic diagram of the driven mechanism and support rail of the radiation protection shielding lead plate door of the present invention. Detailed Implementation

[0029] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0030] like Figure 1 and 2 As shown, this invention provides a radiation-shielding lead plate door, including a support rail 1 and a door panel 2. The support rail 1 is installed at the top of the lead plate door mounting area. The top of the door panel 2 extends into the support rail 1 and can move along it to open and close the lead plate door. Specifically, the bottom of the door panel 2 is connected to a support wheel 21 via a pivot, which supports the bottom of the door panel 2 and facilitates the movement of the door panel 2. A mounting plate 11 is fixed to the top of the support rail 1, and the top of the mounting plate has mounting holes for easy fixing and installing the support rail 1.

[0031] like Figures 3-8 As shown, the lead plate door also includes a drive mechanism, a driven mechanism, and an oil box 5.

[0032] The driven mechanism includes a rack 41, which is disposed along the top of the door panel 2 and connected to the door panel 2. The driving mechanism includes a gear tube 31. The gear tube 31 is a tube with teeth on its outer side. The gear tube 31 is located above the rack 41 and can move downward to mesh with the rack 41. When the gear tube 31 meshes with the rack 41, the gear tube 31 rotates, which drives the door panel 2 to move left and right through the rack 41, thereby realizing the opening and closing of the door panel 2.

[0033] like Figures 3-5 As shown, the oil box 5 contains lubricating oil and is located above the rack 41. A gear tube 31 is positioned on one side of the oil box 5 and can move towards it. Inside the oil box 5 is a matching piston plate 51. At least one piston rod 52 is fixed inside the gear tube 31, with its outer end extending into the oil box 5 and fixed to the piston plate 51. The oil box 5 has an oil outlet valve 53. When the gear tube 31 moves towards the oil box 5, the piston rod 52 moves accordingly, pushing the piston plate 51 within the oil box 5. The piston plate 51 then squeezes lubricating oil from the oil outlet valve 53 onto the rack 41, achieving lubrication and maintenance.

[0034] like Figure 5 As shown, the oil box 5 also has an oil filling valve 54. By setting the oil filling valve 54, when the lubricating oil in the inner cavity of the oil box 5 is almost depleted, it is easy to add lubricating oil to the inner cavity of the oil box 5, so that it can be used for long-term lubrication. The drive box 34 can be opened for easy addition of lubricating oil.

[0035] like Figure 6 As shown, in a preferred embodiment, a frame 411 is fixed around and at the bottom of the rack 41. The frame 411 can support the rack 41 and also receive lubricating oil, which facilitates the lubrication and maintenance of the rack 41.

[0036] like Figures 3-5 As shown, in a specific embodiment, the drive mechanism further includes a drive rod 32 arranged in the front-to-back direction. The gear tube 31, oil box 5, and piston plate 51 are all passed through the drive rod 32. The gear tube 31 can move along the drive rod 32, thereby moving towards the oil box 5. The drive rod 32 can move up and down and rotate. When the drive rod 32 moves down, the gear tube 31 moves down accordingly and meshes with the rack 41; when the drive rod 32 rotates, it drives the gear tube 31 to rotate. Specifically, the cross-section of the drive rod 32 is square or other non-circular, so that the gear tube 31 can both move along it and rotate with it. That is, the drive rod 32 not only drives the gear tube 31 to rotate and move up and down, but also guides the movement of the gear tube 31 relative to the oil box 5.

[0037] There are two gear tubes 31, respectively located on the front and rear sides of the oil box 5. Correspondingly, the oil box 5 is equipped with two matching piston plates 51, which are moved by piston connecting rods 52 inside the two gear tubes 31. In this embodiment, by driving the two gear tubes 31 closer to each other, the piston connecting rods 52 drive the piston plates 51 to move, and the piston plates 51 squeeze out the lubricating oil inside the oil box 5, thereby achieving lubrication and maintenance of the gear components (gear tubes 31 and rack 41) and extending the service life of the fixing device.

[0038] Among them, such as Figures 3-5 As shown, the movement of the gear tube 31 is achieved in a specific embodiment as follows: The drive mechanism also includes two drive plates 33, a guide rod 331, an electric push rod 332, and two connecting rods 333. The two drive plates 33 are vertically arranged and located on the outer sides of the two gear tubes 31, i.e., the front side of the front gear tube 31 and the rear side of the rear gear tube 31, respectively, and can move inward and outward. A drive box 34 is fixed above the support rail 1. The gear tube 31, oil box 5, and drive plates 33 are all located inside the drive box 34. The guide rod 331 is arranged in the front-back direction, passes through the two drive plates 33, and is fixed inside the drive box 34. The electric push rod 332 is vertically arranged, and its upper end is fixed to the guide rod 331. The upper ends of the two connecting rods 333 are rotatably connected to the lower ends of the electric push rod 332, and their lower ends are rotatably connected to the inner sides of the two drive plates 33, respectively. When the electric push rod 332 retracts, the two connecting rods 333 rotate accordingly, causing the two drive plates 33 to move inward, and the gear tube 31 is pushed towards the oil box 5. When the electric push rod 332 extends, the two connecting rods 333 rotate accordingly, pushing the two drive plates 33 to move outward.

[0039] Furthermore, such as Figure 5 As shown, a spring 55 is fitted onto the piston rod 52 inside the gear tube 31. The two ends of the spring 55 contact the oil box 5 and the end face of the gear tube 31, respectively. When the drive plate 33 pushes the gear tube 31 towards the oil box 5, the spring 55 is compressed. When the drive plate 33 moves outward, the compressed spring 55 generates tension, pushing the gear tube 31 outward, and the piston plate 51 moves outward and resets accordingly.

[0040] In this embodiment, the drive plate 33 is driven to move closer to or further away from each other by setting guide rod 331, electric push rod 332 and connecting rod 333, thereby controlling the movement of gear tube 31.

[0041] Furthermore, such as Figure 5 As shown, a limit plate 311 is fixed on the drive rod 32, located on the outside of the two gear tubes 31 respectively, to limit the outward reset of the gear tubes 31 and ensure the effective working position of the gear tubes 31.

[0042] like Figures 3-5As shown, the vertical movement and rotation of the drive rod 32 are implemented in a specific embodiment as follows: the drive mechanism further includes two guide plates 35, a spring telescopic rod 36, a motor 37, and two pressing blocks 351. The two guide plates 35 are located at both ends of the drive rod 32 and are slidably connected to the drive housing 34, allowing them to slide vertically relative to the drive housing 34. Specifically, the drive housing 34 has grooves 352 on its front and rear side walls, and sliders 353 are fixed to the outer walls of the guide plates 35. The sliders 353 of the two guide plates 35 are respectively located in the two grooves 352 at the front and rear of the drive housing 34, and the guide plates 35 are slidably connected to the drive housing 34 via the sliders 353. The drive rod 32 is rotatably connected to the guide plates 35 via bearings, allowing it to rotate relative to the guide plates 35 and move vertically with them. The upper end of the spring telescopic rod 36 is fixed to the outside of the drive box 34 by a support plate. The motor 37 is fixed to the lower end of the spring telescopic rod 36. The output shaft of the motor 37 passes through the motor adjustment hole 371 on the side wall of the drive box 34 and is connected to the drive rod 32, which is mounted on the guide plate 35 via a bearing, driving the drive rod 32 to rotate. The extrusion block 351 is wedge-shaped. The two extrusion blocks 351 are fixed to the outside of the two drive plates 33, with their inclined surfaces facing outwards. The two guide plates 35 are respectively set on the outside of the two extrusion blocks 351, that is, they abut against the inclined surfaces of the extrusion blocks 351. When the two drive plates 33 move outwards, the extrusion blocks 351 press the guide plates 35 downwards, and the drive rod 32 drives the gear tube 31 to move downwards accordingly. The motor 37 moves downwards synchronously, and the spring telescopic rod 36 extends. Two drive plates 33 drive the extrusion block 351 to move inward, the downward extrusion force on the guide plate 35 disappears, the elongated spring telescopic rod 36 tends to retract, and the retraction of the spring telescopic rod 36 drives the guide plate 35 and drive rod 32 to move upward through the motor 37, and the gear tube 31 moves upward accordingly. That is, in this embodiment, the wedge-shaped extrusion block 351 drives the guide plate 35 and drive rod 32 to move downward, and then the spring telescopic rod 36 realizes the reset of the drive rod 32 and guide plate 35. Among them, the motor adjustment hole 371 is an elliptical hole, which allows the output shaft of the motor 37 passing through it to move up and down, and at the same time guides its movement.

[0043] like Figures 6-8 As shown, regarding the driven mechanism, in a specific embodiment, the rack 41 has guide grooves 42 on both its front and rear sides, with the openings facing upwards. The bottoms of the two guide plates 35 are respectively inserted into the two guide grooves 42, and move up and down within the guide grooves 42, thereby positioning the door panel 2 within its range of motion when the door panel 2 moves.

[0044] like Figure 6 and 7As shown, in a preferred embodiment, the bottom of the guide plate 35 and the bottom of the guide groove 42 are respectively provided with matching concave and convex structures. When the guide plate 35 drives the gear tube 31 to move down to half-engage with the rack 41 (i.e., there is a gap between the tooth tip and the tooth root), the concave and convex structures of the bottom of the guide plate 35 and the bottom of the guide groove 42 do not contact each other, and the gear tube 31 rotates to drive the rack 41 to move; when the guide plate 35 drives the gear tube 31 to move down to fully engage with the rack 41, the concave and convex structures of the bottom of the guide plate 35 and the bottom of the guide groove 42 insert into each other, the gear tube 31 and the rack 41 are fixed, the door panel 2 is in a locked mode, and cannot be opened or closed manually or by the motor 37.

[0045] Specifically, the bottom of the guide plate 35 is provided with a row of protrusions 354, and the bottom of the guide groove 42 is provided with a row of grooves 421. When the guide plate 35 moves down until the protrusions 354 are inserted into the grooves 421 at the bottom of the guide groove 42, the door panel 2 is locked and cannot be moved.

[0046] like Figures 6-8 As shown, regarding the driven mechanism, in a specific embodiment, a connecting groove 431 is fixed to the top of the door panel 2. The connecting groove 431 opens upwards and has rack adjustment holes 432 penetrating its front and rear groove walls. A horizontal connecting plate 433 and a vertical connecting plate 434 are provided inside the connecting groove 431. Two guide grooves 42 are located on the front and rear sides of the connecting groove 431, respectively. The horizontal connecting plate 433 passes through the rack adjustment holes 432 and is fixed to the two guide grooves 42 on its front and rear sides, respectively. The rack 41 is fixed above the horizontal connecting plate 433 by the vertical connecting plate 434. The rack 41 is fixed to the two guide grooves 42 by the vertical connecting plate 434 and the horizontal connecting plate 433 to form an integral adjustment structure, which can move up and down along the rack adjustment holes 432. The bottom edge of the side wall of the support rail 1 is bent inward to form a support plate 12. The support plate 12 is equipped with several support bolts 44. The support bolt 44 is vertically installed and threadedly connected to the support plate 12, with its upper end abutting against the bottom surface of the guide groove 42. Rotating the support bolt 44 causes it to move up and down relative to the support plate 12, and the adjustment structure moves up and down within the range of the rack adjustment hole 432. In this embodiment, by setting the support bolt 44, the guide groove 42 and the rack 41 can be supported, realizing the adjustment of the meshing between the gear tube 31 and the rack 41. At the same time, the height of the rack 41 can also be adjusted. When the motor 37 is damaged and the door needs to be opened in time, the rack 41 can be separated from the gear tube 31, thus forcibly opening the door.

[0047] The working principle of the radiation protection shielding lead plate door of this invention is as follows:

[0048] 1. Manual opening and closing: When the gear tube 31 is located above the rack 41 and not engaged with the rack 41, the door panel 2 can be opened and closed manually. At this time, the bottom of the guide plate 35 is inserted into the corresponding guide groove 42. When the door panel 2 moves, the guide plate 35 is used to control the movement range of the door panel 2.

[0049] II. Electric Opening and Closing: By controlling the extension of the electric push rod 332, the connecting rod 333 is moved, which pushes the two drive plates 33 away. The drive plates 33 drive the pressing block 351 to move, and the pressing block 351 presses the guide plate 35 to move downward. The guide plate 35 drives the gear tube 31 to move downward through the drive rod 32. The gear tube 31 moves downward until it is half-engaged with the rack 41. At this time, there is a gap between the tooth tip and the tooth root. The guide plate 35 moves downward synchronously in the guide groove 42, but the protrusion 354 and the groove 421 do not contact each other. Then, by controlling the operation of the motor 37, the drive rod 32 is rotated, and the gear tube 31 rotates accordingly. The rack 41 drives the door panel 2 to move, realizing the opening and closing of the door.

[0050] 3. Locking mode: After the door panel 2 is electrically closed, the electric push rod 332 continues to extend. Since there is a gap between the tip and root of the gear tube 31 and the tooth of the rack 41, the guide plate 35 can continue to move downward in the guide groove 42. When the guide plate 35 moves down to the point where the protrusion 354 on its bottom plate is inserted into the groove 421 at the bottom of the guide groove 42, the rack 41 is fixed, thus locking the door panel 2 and enhancing the stability of the door panel 2.

[0051] When it is necessary to switch from the locked mode to the electric opening / closing mode or from the electric opening / closing mode to the manual opening / closing mode, the electric push rod 332 is retracted, which drives the two connecting rods 333 to move. The two drive plates 33 then drive the two pressing blocks 351 to move closer to each other, causing the pressing blocks 351 to separate from the guide plate 35. After separation, the spring telescopic rod 36 retracts, pulling the motor 37 to move upward and return to its original position. The motor 37 drives the drive rod 32 and the guide plate 35 to move upward and return to their original position. When the upward movement reaches the point where the protrusion 354 of the guide plate 35 disengages from the groove 421 of the guide groove 42, and the gear tube 31 is partially engaged with the rack 41, it switches to the electric opening / closing mode. When the upward movement continues until the gear tube 31 disengages from the rack 41, it switches to the manual opening / closing mode, but at this time the guide plate 35 is still inserted in the guide groove 42, maintaining the limit on the door panel 2.

[0052] IV. Forced Opening: During electric opening and closing, the gear tube 31 and rack 41 are engaged. If the motor 37 malfunctions and cannot open the door promptly, rotating the support bolt 44 causes it to move downwards. At this time, the guide groove 42 and other integrated adjustment structures move downwards due to their own weight, causing the rack 41 to separate from the gear tube 31. Pushing the door panel 2 then allows for manual forced opening. The guide groove 42 moves downwards but does not separate from the guide plate 35. Thus, when the door panel 2 moves, the guide plate 35 inserted in the guide groove 42 can still limit the movement distance of the door panel 2, preventing it from detaching from the support rail 1.

[0053] V. Lubrication: By controlling the retraction of the electric push rod 332, the connecting rod 333 is moved. The two connecting rods 333 pull the two drive plates 33 closer to each other. The drive plates 33 push the gear tube 31 to move towards the oil box 5. At this time, the gear tube 31 pushes the piston plate 512 to move through the piston connecting rod 52. The two piston plates 51 move closer to each other, which increases the pressure in the inner cavity of the oil box 5, causing the oil outlet valve 53 to open. The lubricating oil flows into the frame 411 through the oil outlet valve 53 and contacts the rack 41 to lubricate and maintain the rack 41.

[0054] In this invention, unless otherwise stated, scientific and technical terms used herein have the meanings commonly understood by those skilled in the art.

[0055] It should be noted that the terms such as "upper", "lower", "left", "right", "front", and "back" used in the invention are only for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0056] Finally, it should be noted that the above 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. A radiation-shielding lead plate door, comprising a support rail and a door panel, wherein the top of the door panel extends into the support rail and can move along it to realize the opening and closing of the lead plate door, characterized in that: It also includes a drive mechanism, a driven mechanism, and an oil box; The driven mechanism includes a rack, which is disposed along the top of the door panel and connected to the door panel; The drive mechanism includes a gear tube; the gear tube is a tube with teeth on the outside; the gear tube is located above the rack and can move down to mesh with the rack; when the gear tube meshes with the rack, the gear tube rotates, which drives the door panel to move through the rack. The oil box contains lubricating oil and is located above the rack; the gear tube is located on one side of the oil box and can move into the oil box; the oil box is equipped with a matching piston plate, and a piston connecting rod is fixed inside the gear tube. The piston connecting rod extends into the oil box and is fixed to the piston plate. The oil box has an oil outlet valve; the gear tube moves toward the oil box, and the piston connecting rod moves accordingly to push the piston plate, and the piston plate squeezes the lubricating oil from the oil outlet valve onto the rack. The drive mechanism also includes a drive rod arranged in the front-to-back direction; the gear tube, oil box and piston plate are all passed through the drive rod, and the gear tube can move along the drive rod; the drive rod can move up and down and rotate; when the drive rod moves down, the gear tube moves down and meshes with the rack; when the drive rod rotates, it drives the gear tube to rotate; there are two gear tubes, which are respectively arranged on the front and rear sides of the oil box; The drive mechanism also includes two drive plates, a guide rod, an electric push rod, and two connecting rods. The two drive plates are vertically arranged and located outside the two gear tubes, respectively, and can move inward and outward. A drive box is fixed above the support rail. The guide rod is arranged in the front-to-back direction, passes through the two drive plates, and is fixed inside the drive box. The electric push rod is vertically arranged, with its upper end fixed to the guide rod. The upper ends of the two connecting rods are rotatably connected to the lower ends of the electric push rod, and their lower ends are rotatably connected to the inner sides of the two drive plates, respectively. When the electric push rod retracts, the two connecting rods rotate accordingly, driving the two drive plates to move inward, and the gear tubes are pushed towards the oil box. When the electric push rod extends, the two connecting rods rotate accordingly, pushing the two drive plates to move outward.

2. The radiation shielding lead plate door according to claim 1, characterized in that: A spring is fitted on the piston connecting rod inside the gear tube; When the drive plate pushes the gear tube towards the oil box, the spring is compressed; when the drive plate moves outward, the compressed spring pushes the gear tube and piston plate outward.

3. The radiation protection shielding lead plate door according to claim 2, characterized in that: Limiting plates are fixed on the drive rod, located on the outside of the two gear tubes respectively.

4. The radiation shielding lead plate door according to claim 1, characterized in that: The drive mechanism also includes two guide plates, a spring telescopic rod, a motor, and two pressing blocks; Two guide plates are located at both ends of the drive rod and are slidably connected to the drive box, allowing them to slide up and down relative to the drive box; the drive rod is rotatably connected to the guide plates, allowing it to rotate relative to the guide plates and move up and down with them. The upper end of the spring telescopic rod is fixed to the drive box, the motor is fixed to the lower end of the spring telescopic rod, and the output shaft of the motor is connected to the drive rod to drive the drive rod to rotate. The extrusion blocks are wedge-shaped; two extrusion blocks are fixed to the outside of the two drive plates, with the inclined surfaces facing outwards; two guide plates are respectively disposed on the outside of the two extrusion blocks; The two drive plates move outward, pressing the guide plate downward through the extrusion block. The drive rod then drives the gear tube downward, and the motor moves downward synchronously, extending the spring telescopic rod. Two drive plates move the extrusion block inward, the spring telescopic rod retracts, and the motor drives the guide plate and drive rod to move upward, and the gear tube moves upward accordingly.

5. The radiation shielding lead plate door according to claim 4, characterized in that: The rack has guide grooves on both its front and rear sides with their openings facing upwards. The bottoms of the two guide plates are respectively inserted into two guide grooves, and move up and down within the guide grooves.

6. The radiation shielding lead plate door according to claim 5, characterized in that: The bottom of the guide plate and the bottom of the guide groove are respectively provided with matching concave and convex structures; When the guide plate moves the gear tube down to half-engage with the rack, the concave and convex structures on the bottom of the guide plate and the bottom of the guide groove do not contact each other, and the gear tube rotates to move the rack. When the guide plate moves the gear tube down to fully engage with the rack, the concave and convex structures on the bottom of the guide plate and the bottom of the guide groove interlock, and the gear tube and the rack are fixed.

7. The radiation shielding lead plate door according to claim 6, characterized in that: The top of the door panel is fixed with a connecting groove along it; The connecting groove has an upward-facing opening and a rack adjustment hole that extends through its front and rear groove walls; The connecting groove is provided with a horizontal connecting plate and a vertical connecting plate; the two guide grooves are located on the front and rear sides of the connecting groove respectively; the horizontal connecting plate passes through the rack adjustment hole and is fixed to the two guide grooves on the front and rear sides respectively; the rack is fixed above the horizontal connecting plate by the vertical connecting plate; the rack is fixed to the two guide grooves by the vertical connecting plate and the horizontal connecting plate to form an integral adjustment structure, and the adjustment structure can move up and down along the rack adjustment hole; The bottom edge of the side wall of the support rail is bent inward to form a support plate; the support plate is equipped with several support bolts; the support bolts are set vertically and threadedly connected to the support plate, with their upper ends abutting against the bottom surface of the guide groove; rotating the support bolts causes them to move up and down relative to the support plate, and the adjustment structure moves up and down within the range of the rack adjustment hole.

8. The radiation shielding lead plate door according to claim 1, characterized in that: A frame is fixed around and at the bottom of the rack; The oil box also has an oil injection valve.

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