Ray protection shielding lead plate door

Abstract

The invention discloses a radiation protection shielding lead plate door, which belongs to the field of radiation protection and comprises a driving mechanism, a driven mechanism and an oil box. The driven mechanism comprises a rack which is arranged along the top end of the door plate and connected with the door plate. The driving mechanism comprises a gear pipe; the gear pipe is located above the rack and can move downwards to be meshed with the rack. When the gear pipe is meshed with the rack, the gear pipe rotates to drive the door plate to move through the rack; the oil box is filled with lubricating oil and is positioned above the rack; the gear pipe is arranged on one side of the oil box and can move towards the oil box; a piston plate matched with the oil box is arranged in the oil box, and a piston connecting rod is fixed in the gear pipe and extends into the oil box to be fixed to the piston plate. The oil box is provided with an oil outlet valve; the gear pipe moves towards the oil box, the piston connecting rod moves along with the gear pipe to push the piston plate, and the piston plate extrudes lubricating oil out of the oil outlet valve to fall on the rack. The gear structure can be automatically lubricated, and meanwhile the functions of manual opening and closing, electric opening and closing and the like can be achieved.

Description

Technical Field

[0001] The invention belongs to the field of radiation protection and relates to a door, in particular to a radiation protection shielding lead plate door. Background Art

[0002] Lead protection doors are also called radiation protection doors, lead doors, lead plate doors, and ray protection doors. They are used to block the entrance and exit of rays. The exposure room of industrial flaw detection generally has multiple X-ray machines and multiple operators performing their respective operations at the same time. They are widely used in boilers, petrochemicals and other fields. They are mainly used for non-destructive testing of workpiece welds. Traditional ray protection lead plate doors are driven by a drive motor to drive the gear transmission to realize the opening and closing of the lead plate doors. When lubricating and maintaining the lead plate doors, it is necessary to manually disassemble the gear box and apply lubricating oil for maintenance. The operation is cumbersome and brings trouble to the maintenance personnel.

[0003] For example: The "anti-radiation self-shielding protective lead door" disclosed by the utility model patent (application number: 202321813592.X) discloses in its specification: When the existing protective lead door is used for a long time, the operator needs to climb to a high place to maintain the moving mechanism of the lead door. The entire maintenance measures are relatively cumbersome and complicated, which is not conducive to the long-term operation of the lead door. Summary of the invention

[0004] The invention provides a radiation protection shielding lead plate door to overcome the defects of the prior art.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A radiation protection shielding lead plate door comprises a supporting rail and a door panel, the top of the door panel extends into the supporting rail and can move along the supporting rail to realize the opening and closing of the lead plate door; it also comprises a driving mechanism, a driven mechanism and an oil box; the driven mechanism comprises a rack, the rack is arranged along the top of the door panel and is connected to the door panel; the driving mechanism comprises a gear tube; the gear tube is a pipe fitting with a tooth structure on the outer side; the gear tube is located above the rack and can move downward to engage with the rack; when the gear tube engages with the rack, the gear tube rotates and drives the door panel to move through the rack; the oil box is filled with lubricating oil and is located above the rack; the gear tube is arranged on one side of the oil box and can move toward the oil box; a piston plate matching with it is provided in the oil box, a piston connecting rod is fixed in 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; when the gear tube moves toward the oil box, the piston connecting rod moves accordingly to push the piston plate, and the piston plate squeezes the lubricating oil from the oil outlet valve and falls on the rack.

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

[0008] Furthermore, the driving mechanism also includes a driving rod arranged in the front-to-back direction; the gear tube, the oil box and the piston plate are all passed through by the driving rod, and the gear tube can move along the driving rod; the driving rod can move up and down and rotate; the driving rod moves downward, and the gear tube moves downward accordingly to engage with the rack; the driving rod rotates, driving 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 driving mechanism also includes two driving plates, a guide rod, an electric push rod and two connecting rods; the two driving plates are vertically arranged and respectively located on the outsides of the two gear tubes and can move inward and outward; a driving box is fixed above the support rail; the guide rod is arranged along the front-to-back direction, passes through the two driving plates, and is fixed in the driving box; the electric push rod is vertically arranged, and the 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 rods, and the lower ends are respectively rotatably connected to the inner sides of the two driving plates; when the electric push rod contracts, the two connecting rods rotate accordingly, driving the two driving plates to move inward, and the gear tubes are pushed toward the oil box; when the electric push rod extends, the two connecting rods rotate accordingly, pushing the two driving plates to move outward.

[0010] Furthermore, a spring is sleeved on the piston connecting rod in the gear tube; when the driving plate pushes the gear tube to move toward the oil box, the spring is compressed; when the driving plate moves outward, the compressed spring pushes the gear tube and the piston plate to move outward.

[0011] Furthermore, limiting plates are fixed on the driving rod and are respectively located on the outsides of the two gear tubes.

[0012] Furthermore, the driving mechanism also includes two guide plates, a spring telescopic rod, a motor and two extrusion blocks; the two guide plates are arranged at both ends of the driving rod and are slidably connected to the driving box and can slide up and down relative to the driving box; the driving rod is rotatably connected to the guide plate and can rotate relative to the guide plate and move up and down with the guide plate; the upper end of the spring telescopic rod is fixed to the driving 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 driving rod to drive the driving rod to rotate; the extrusion block is wedge-shaped; the two extrusion blocks are fixed on the outer sides of the two driving plates, and the inclined surfaces face outwards; the two guide plates are respectively arranged on the outer sides of the two extrusion blocks; the two driving plates move outward, and the guide plates are squeezed downward by the extrusion blocks, and the driving rod drives the gear tube to move downward accordingly, and the motor moves downward synchronously accordingly, and the spring telescopic rod extends; the two driving plates drive the extrusion blocks to move inward, the spring telescopic rod contracts, and the guide plates and the driving rod are driven upward by the motor, and the gear tube moves upward accordingly.

[0013] Furthermore, guide grooves are provided along the front and rear sides of the rack and open upward; the bottoms of the two guide plates are respectively inserted into the two guide grooves and move up and down in the guide grooves.

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

[0015] Furthermore, a connecting groove is fixed along the top of the door panel; the connecting groove opens upward and has a rack adjustment hole that passes through the front and rear groove walls; a horizontal connecting plate and a vertical connecting plate are provided in the connecting groove; the 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 the front and rear sides are respectively fixed to the two guide grooves; the rack is fixed above the horizontal connecting plate through the vertical connecting plate; the rack is fixed to the two guide grooves through 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 provided with a number of support bolts; the support bolts are vertically arranged, threadedly connected to the support plate, and the upper end is against the bottom surface of the guide groove; the support bolts are rotated 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; and the oil box also has an oil filling valve.

[0017] The beneficial effects of the present invention are:

[0018] 1. In order to solve the problem in the prior art that when lubricating and maintaining the lead plate door, it is necessary to manually disassemble the gear box and apply lubricating oil for maintenance, which is cumbersome and causes trouble to maintenance personnel, the present invention arranges an electric push rod and a connecting rod to drive the two drive plates to approach each other, squeeze the gear tube close to the oil box, and push the piston plate to move the lubricating oil through the push rod, so that the lubricating oil is sprayed between the gear tube and the rack, which is convenient for lubrication and maintenance and prolongs the service life of the fixing device.

[0019] Second, the present invention controls the guide plate to move downward through the driving plate and the extrusion block, so that the gear tube therebetween moves downward to engage with the rack, and at the same time, by providing guide grooves on both sides of the rack for the guide plate to extend into, the moving position of the door panel is limited to prevent the door panel from leaving the support rail. In addition, by providing concave-convex structures on the guide plate and the guide groove, the locking function of the lead plate door is realized.

[0020] 3. The present invention achieves adjustment of the rack height by arranging rack adjustment holes on the connecting structure and supporting bolts on the supporting rails. When the motor is damaged and the door needs to be opened in time, the height of the rack can be adjusted to make the rack detach from the gear tube, thereby realizing forced door opening. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 It 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 It is a schematic structural diagram of the radiation protection shielding lead plate door of the present invention with a portion of the driving box and the top surface of the supporting rail removed;

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

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

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

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

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

[0029] The specific implementation of the present invention is described below with reference to the accompanying drawings.

[0030] like Figure 1 and 2 As shown, the present invention provides a radiation protection shielding lead door, including a support rail 1 and a door panel 2. The support rail 1 is installed at the top of the lead door installation area. The top of the door panel 2 extends into the support rail 1 and can move along it to realize the opening and closing of the lead door. Specifically, the bottom of the door panel 2 is connected to a support wheel 21 through a rotating shaft to support the bottom of the door panel 2 and facilitate the movement of the door panel 2. A mounting plate 11 is fixed to the top of the support rail 1, and a mounting hole is opened on the top of the mounting plate to facilitate the fixed installation of the support rail 1.

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

[0032] The driven mechanism includes a rack 41, which is arranged 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 pipe with a tooth structure on the outside. The gear tube 31 is located above the rack 41 and can move down to mesh with the rack 41. When the gear tube 31 meshes with the rack 41, the gear tube 31 rotates, and the door panel 2 is driven to move left and right through the rack 41, so that the door panel 2 can be opened and closed.

[0033] like Figures 3 to 5 As shown, the oil box 5 is filled with lubricating oil and is located above the rack 41. The gear tube 31 is arranged on one side of the oil box 5 and can move toward the oil box 5. A piston plate 51 matching with it is arranged in the oil box 5. At least one piston connecting rod 52 is fixed in the gear tube 31. The outer end of the piston connecting rod 52 extends into the oil box 5 and is fixed to the piston plate 51. The oil box 5 has an oil outlet valve 53. When the gear tube 31 moves toward the oil box 5, the piston connecting rod 52 moves accordingly and pushes the piston plate 51 to move in the oil box 5. The piston plate 51 squeezes the lubricating oil from the oil outlet valve 53 and drops it on the rack 41 to achieve lubrication maintenance.

[0034] like Figure 5 As shown, the oil box 5 also has an oil filling valve 54. By providing the oil filling valve 54, when the lubricating oil in the inner cavity of the oil box 5 is almost consumed, it is convenient to add lubricating oil to the inner cavity of the oil box 5, so that long-term lubrication can be used. The drive box 34 can be opened to facilitate the filling 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 , and the frame 411 can support the rack 41 and also receive lubricating oil to facilitate lubrication and maintenance of the rack 41 .

[0036] like Figures 3 to 5 As shown, in a specific embodiment, the driving mechanism also includes a driving rod 32 arranged in the front-to-back direction. The gear tube 31, the oil box 5 and the piston plate 51 are all penetrated by the driving rod 32, and the gear tube 31 can move along the driving rod 32, thereby realizing the movement toward the oil box 5. The driving rod 32 can move up and down and rotate. When the driving rod 32 moves down, the gear tube 31 moves down accordingly and meshes with the rack 41; the driving rod 32 rotates, driving the gear tube 31 to rotate. Specifically, the cross-section of the driving rod 32 is a square or other non-circular structure, so that the gear tube 31 can move along it and rotate with it. That is, the driving 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, which are respectively arranged at the front and rear sides of the oil box 5. Correspondingly, two piston plates 51 matching with the oil box 5 are arranged in the oil box 5, and the piston connecting rods 52 in the two gear tubes 31 drive the piston plates 51 to move. In this embodiment, by driving the two gear tubes 31 to approach each other, the piston connecting rods 52 drive the piston plates 51 to move, and the piston plates 51 squeeze out the lubricating oil in the inner cavity of the oil box 5, thereby achieving lubrication and maintenance of the gear components (gear tubes 31 and racks 41), and extending the service life of the fixing device.

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

[0039] Furthermore, if Figure 5 As shown, a spring 55 is sleeved on the piston connecting rod 52 in the gear tube 31, and the two ends of the spring 55 are in contact with the oil box 5 and the end surface of the gear tube 31 respectively. When the drive plate 33 pushes the gear tube 31 to move toward 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 to move outward, and the piston plate 51 moves outward to reset accordingly.

[0040] In this embodiment, the guide rod 331 , the electric push rod 332 and the connecting rod 333 are provided to drive the driving plates 33 to move closer to or farther from each other, thereby controlling the movement of the gear tube 31 .

[0041] Furthermore, if Figure 5 As shown, the driving rod 32 is fixed with limiting plates 311 which are respectively located outside the two gear tubes 31 to limit the outward resetting of the gear tubes 31 and ensure the effective working position of the gear tubes 31 .

[0042] like Figures 3 to 5As shown, the up and down movement and rotation of the driving rod 32 are achieved in a specific embodiment as follows: the driving mechanism also includes two guide plates 35, a spring telescopic rod 36, a motor 37 and two extrusion blocks 351. The two guide plates 35 are arranged at both ends of the driving rod 32, and are slidably connected with the driving box 34, and can slide up and down relative to the driving box 34. Specifically, a slide groove 352 is provided on the front and rear side walls of the driving box 34, and a slider 353 is fixed on the outer wall of the guide plate 35. The sliders 353 of the two guide plates 35 are respectively arranged in the two slide grooves 352 in front and behind the driving box 34, and the guide plate 35 is slidably connected with the driving box 34 through the slider 353. The driving rod 32 is rotatably connected with the guide plate 35 through a bearing, and can rotate relative to the guide plate 35 and move up and down with the guide plate 35. The upper end of the spring telescopic rod 36 is fixed to the outside of the drive box 34 through a support plate, and 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 installed on the guide plate 35 through a bearing, so as to drive 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, and the inclined surfaces face outward. The two guide plates 35 are respectively arranged on the outside of the two extrusion blocks 351, that is, they are against the inclined surfaces of the extrusion blocks 351. The two drive plates 33 move outward, and the guide plates 35 are squeezed downward by the extrusion blocks 351, and the drive rod 32 drives the gear tube 31 to move downward, and the motor 37 moves downward synchronously, and the spring telescopic rod 36 extends. The two driving plates 33 drive the squeezing block 351 to move inward, the downward squeezing force on the guide plate 35 disappears, the extended spring telescopic rod 36 tends to shrink, the spring telescopic rod 36 shrinks, and the guide plate 35 and the driving rod 32 are driven upward by the motor 37, and the gear tube 31 moves upward accordingly. That is, in this embodiment, the guide plate 35 and the driving rod 32 are driven downward by pushing the wedge-shaped squeezing block 351, and then the driving rod 32 and the guide plate 35 are reset by the spring telescopic rod 36. Among them, the motor adjustment hole 371 is an elliptical hole, so that the output shaft of the motor 37 passing therethrough can move up and down, and guide its movement at the same time.

[0043] like Figures 6 to 8 As shown, regarding the driven mechanism, in a specific embodiment, the front and rear sides of the rack 41 are provided with guide grooves 42 arranged along the rack 41 and opening upward. The bottoms of the two guide plates 35 are respectively inserted into the two guide grooves 42, and move up and down in the guide grooves 42, so that when the door panel 2 moves, the guide plates 35 are used to position the moving range of the door panel 2.

[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 mutually matching concave-convex structures. When the guide plate 35 drives the gear tube 31 to move down to semi-engage with the rack 41 (i.e., there is a gap between the tooth tip and the tooth root), the concave-convex structures of the bottom of the guide plate 35 and the bottom of the guide groove 42 do not contact, and the rotation of the gear tube 31 drives 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-convex structures of the bottom of the guide plate 35 and the bottom of the guide groove 42 are inserted into each other, the gear tube 31 and the rack 41 are fixed, and the door panel 2 is in a locked mode and cannot be opened or closed manually or by the motor 37.

[0045] Specifically, a row of protrusions 354 are provided at the bottom of the guide plate 35, and a row of grooves 421 are provided at the bottom of the guide groove 42. 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 move.

[0046] like Figures 6 to 8 As shown, regarding the driven mechanism, in a specific embodiment, a connection groove 431 is fixed along the top of the door panel 2. The connection groove 431 opens upward and has a rack adjustment hole 432 that penetrates the front and rear groove walls thereof. A transverse connection plate 433 and a vertical connection plate 434 are provided in the connection groove 431. Two guide grooves 42 are respectively located at the front and rear sides of the connection groove 431. The transverse connection plate 433 passes through the rack adjustment hole 432, and the front and rear sides are respectively fixed to the two guide grooves 42. The rack 41 is fixed above the transverse connection plate 433 through the vertical connection plate 434. The rack 41 is fixed to the two guide grooves 42 through the vertical connection plate 434 and the transverse connection plate 433 to form an integral adjustment structure, and the adjustment structure can move up and down along the rack adjustment hole 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 provided with a plurality of support bolts 44. The support bolt 44 is vertically arranged and threadedly connected to the support plate 12, and the upper end thereof abuts against the bottom surface of the guide groove 42. The support bolt 44 is rotated 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. By providing the support bolt 44, the present embodiment can support the guide groove 42 and the rack 41, realize the adjustment of the meshing between the gear tube 31 and the rack 41, and can also adjust the height of the rack 41. When the motor 37 is damaged and the door needs to be opened in time, the rack 41 is separated from the gear tube 31, and the door can be forced to open.

[0047] The working principle of the radiation protection shielding lead door of the present invention is:

[0048] 1. Manual opening and closing: When the gear tube 31 is located above the rack 41 and is not meshed 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, and when the door panel 2 moves, the guide plate 35 is used to position the moving range of the door panel 2.

[0049] Second, electric opening and closing: By controlling the extension of the electric push rod 332, the connecting rod 333 is driven to move. The connecting rod 333 pushes the two driving plates 33 away. The driving plate 33 drives the extrusion block 351 to move. The extrusion block 351 squeezes the guide plate 35 to move downward. The guide plate 35 drives the gear tube 31 downward through the driving rod 32. The gear tube 31 moves downward until it is semi-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 in the guide groove 42 synchronously, but the protrusion 354 and the groove 421 do not contact. Then, the driving rod 32 is driven to rotate by controlling the operation of the motor 37, and the gear tube 31 rotates accordingly, driving the rack 41 to drive the door panel 2 to move, so as to realize 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 be controlled to extend. Since there is a gap between the tooth tips and tooth roots of the gear tube 31 and 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 at the bottom of the plate is inserted into the groove 421 at the bottom of the guide groove 42, the rack 41 is fixed, and the door panel 2 is locked and fixed, thereby enhancing the stability of the door panel 2.

[0051] When it is necessary to change from the locking mode to the electric opening and closing mode or from the electric opening and closing mode to the manual opening and closing mode, the electric push rod 332 is controlled to retract, driving the two connecting rods 333 to move, and the two driving plates 33 then drive the two extrusion blocks 351 to approach each other, so that the extrusion blocks 351 are separated from the guide plate 35. After separation, the spring telescopic rod 36 retracts, pulling the motor 37 to move upward and return to its position, and the motor 37 drives the driving rod 32 and the guide plate 35 to move upward and return to its position. When the protrusion 354 of the guide plate 35 moves upward and disengages from the groove 421 of the guide groove 42, and the gear tube 31 is half-engaged with the rack 41, it changes to the electric opening and closing mode. When it continues to move upward until the gear tube 31 is disengaged from the rack 41, it changes to the manual opening and closing mode, but at this time the guide plate 35 is still inserted in the guide groove 42 to maintain the limit position of the door panel 2.

[0052] 4. Forced door opening: When opening and closing the door electrically, the gear tube 31 and the rack 41 are in meshing state. When the motor 37 is damaged and the door cannot be opened in time, the support bolt 44 is rotated to move the support bolt 44 downward. At this time, the guide groove 42 and other adjustment structures integrated with it move downward due to their own gravity, so that the rack 41 is separated from the gear tube 31. At this time, the door panel 2 is pushed to move, and the door can be manually forced to open. The guide groove 42 moves downward but does not separate from the guide plate 35. In this way, when the door panel 2 moves, the guide plate 35 inserted in the guide groove 42 can still limit the moving distance of the door panel 2 to prevent the door panel 2 from separating from the support rail 1.

[0053] 5. Lubrication: The electric push rod 332 is controlled to contract to drive the connecting rod 333 to move. The two connecting rods 333 pull the two driving plates 33 closer to each other. The driving plate 33 pushes the gear tube 31 to move toward 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 are closer to each other, which increases the pressure in the inner cavity of the oil box 5 and prompts 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, thereby lubricating and maintaining the rack 41.

[0054] In the present invention, unless otherwise specified, the 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", "back", etc. cited in the invention are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0056] Finally, it should be noted that the above are only 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 aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A radiation shielding lead 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 the support rail to realize the opening and closing of the lead door, characterized in that: It also includes a driving mechanism, a driven mechanism and an oil box; The driven mechanism includes a rack, which is arranged along the top of the door panel and connected to the door panel; The driving mechanism includes a gear tube; the gear tube is a tube with a tooth structure 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 and drives the door panel to move through the rack; The oil box is filled with lubricating oil and is located above the rack; the gear tube is arranged on one side of the oil box and can move toward the oil box; a piston plate matching with it is arranged in the oil box, a piston connecting rod is fixed in the gear tube, and 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 and drops it onto the rack.

2. The radiation protection shielding lead door according to claim 1, characterized in that: The driving mechanism further comprises a driving rod arranged along the front-rear direction; The gear tube, the oil box and the piston plate are all penetrated by the driving rod, and the gear tube can move along the driving rod; The driving rod can move up and down and rotate; when the driving rod moves down, the gear tube moves down and meshes with the rack; when the driving rod rotates, the gear tube rotates; There are two gear tubes, which are respectively arranged on the front and rear sides of the oil box.

3. The radiation protection shielding lead door according to claim 2, characterized in that: The driving mechanism also includes two driving plates, a guide rod, an electric push rod and two connecting rods; Two driving plates are vertically arranged, respectively located on the outsides of the two gear tubes, and can move inwards and outwards; A drive box is fixed above the support rail; The guide rod is arranged along the front-rear direction, passes through the two driving plates, and is fixed in the driving box; The electric push rod is set vertically, and the 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 rods, and the lower ends are rotatably connected to the inner sides of the two driving plates respectively; When the electric push rod contracts, the two connecting rods rotate accordingly, driving the two drive plates to move inward, and the gear tube is pushed toward the oil box; when the electric push rod extends, the two connecting rods rotate accordingly, pushing the two drive plates to move outward.

4. The radiation protection shielding lead door according to claim 3, characterized in that: A spring is sleeved on the piston connecting rod in the gear tube; When the driving plate pushes the gear tube to move toward the oil box, the spring is compressed; when the driving plate moves outward, the compressed spring pushes the gear tube and the piston plate to move outward.

5. The radiation protection shielding lead door according to claim 4, characterized in that: Limiting plates are fixed on the driving rod and are respectively located at the outer sides of the two gear tubes.

6. The radiation protection shielding lead door according to claim 3, characterized in that: The driving mechanism also includes two guide plates, a spring telescopic rod, a motor and two extrusion blocks; Two guide plates are arranged at both ends of the driving rod and are slidably connected with the driving box and can slide up and down relative to the driving box; the driving rod is rotatably connected with the guide plates and can rotate relative to the guide plates and move up and down with the guide plates; The upper end of the spring telescopic rod is fixed to the driving 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 driving rod to drive the driving rod to rotate; The extrusion block is wedge-shaped; the two extrusion blocks are fixed on the outer sides of the two driving plates, with the inclined surfaces facing outwards; the two guide plates are respectively arranged on the outer sides of the two extrusion blocks; The two driving plates move outward, and the extrusion block squeezes the guide plate downward, and the driving rod drives the gear tube downward, and the motor moves downward synchronously, and the spring telescopic rod extends; The two driving plates drive the extrusion block to move inward, the spring telescopic rod contracts, and the guide plate and the driving rod are driven upward by the motor, and the gear tube moves upward accordingly.

7. The radiation protection shielding lead door according to claim 6, characterized in that: The front and rear sides of the rack are both provided with guide grooves arranged along the rack and opening upwards; The bottoms of the two guide plates are respectively inserted into the two guide grooves and move up and down in the guide grooves.

8. The radiation protection shielding lead door according to claim 7, characterized in that: The bottom of the guide plate and the bottom of the guide groove are respectively provided with concave and convex structures that match each other; When the guide plate drives the gear tube to move downward to semi-engage with the rack, the concave-convex structures on the bottom of the guide plate and the bottom of the guide groove do not contact, and the rotation of the gear tube drives the rack to move; when the guide plate drives the gear tube to move downward to fully engage with the rack, the concave-convex structures on the bottom of the guide plate and the bottom of the guide groove are inserted into each other, and the gear tube and the rack are fixed.

9. The radiation protection shielding lead door according to claim 8, characterized in that: The top end of the door panel is fixed with a connecting groove arranged along the top end; The connecting groove opens upward and has a rack adjustment hole penetrating the front and rear groove walls thereof; A horizontal connecting plate and a vertical connecting plate are provided in the connecting groove; the two guide grooves are respectively located at the front and rear sides of the connecting groove; the horizontal connecting plate passes through the rack adjustment hole, and the front and rear sides are respectively fixed to the two guide grooves; the rack is fixed above the horizontal connecting plate through the vertical connecting plate; the rack is fixed to the two guide grooves through 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 a plurality of support bolts; the support bolts are vertically arranged, threadedly connected to the support plate, and the upper ends are against the bottom surface of the guide groove; the support bolts are rotated 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.

10. The radiation protection shielding lead 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 filling valve.

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