A kind of lead door arbitrary hovering buffer limiting adjusting device
Patent Information
- Application Number
- CN202522213330.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-20
- Publication Date
- 2026-10-13
- Estimated Expiration
- 2035-10-20
AI Technical Summary
现有设备无法满足这种灵活的悬停需求
[0017]与现有技术相比，本实用新型的有益效果是：本铅门任意悬停缓冲限位的调节装置，绝对安全，无需电力，采用机械结构，利用盘式阻尼器的盘片与其他部件接触时，摩擦力会产生阻力，从而减缓运动实现任意位置的悬停。其锁止状态不依赖任何电力维持，从根本上消除了因停电、电路或电器故障而导致的坠门风险，安全性极高。无级悬停，操作灵活，克服了传统棘齿、插销机构只能定点锁止的缺点，实现了在铅门整个行程范围内任意高度的无级悬停，极大方便了操作人员根据实际需求灵活定位门体。安全可靠，无断电风险，整个系统为纯机械结构，角度限位提供物理硬停止，盘式阻尼器提供摩擦锁止，双重保障，无需电力，从根本上消除了失控风险。可调预置，适应性强，角度限位器的位置可根据不同设备的常用工位需求进行灵活设计，通用性强，适应不同用户的工艺习惯。结构简单耐用，增加的限位机构结构简单，坚固耐用，不会增加系统的复杂度和故障率。
Smart Images
Figure CN224849753U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an adjustment device for the buffer limit of arbitrary suspension of a lead door. Background Technology
[0002] In nuclear medicine diagnosis and treatment, radiopharmaceuticals with strong gamma-ray radiation are required. To protect operators from radiation damage, these operations must be carried out in protective equipment with sufficient lead equivalent. This equipment is typically equipped with extremely heavy lead shielding doors (hereinafter referred to as "lead doors"), which can weigh thousands of kilograms.
[0003] Currently, most lead doors of this type use a motor-driven lifting structure. However, there are significant drawbacks in the existing technology: Limited Functionality: Most lead doors are only preset with two positions: "fully open" and "fully closed," controlled by limit switches. However, in actual processes, it is often necessary to briefly stop the door in the intermediate position, for example, to check the internal status of equipment, transfer materials, clean, or ventilate. Existing equipment cannot meet this flexible stopping requirement.
[0004] Poor hovering reliability: Some devices use a momentary control motor to achieve a rough hovering, but this method not only has poor positioning accuracy, but also requires the motor to continuously output torque to counteract the weight of the door, which can easily lead to motor overheating and damage, high energy consumption, and complex control circuitry. Although there are purely mechanical hovering solutions such as ratchet and pin mechanisms, they cannot achieve stepless hovering within the travel range, making operation inconvenient and lacking in flexibility.
[0005] There are serious safety hazards: The most significant risk lies in the "door falling" accident during a power outage. Once the drive system loses power, the motor's holding torque disappears, and the heavy lead door will accelerate downwards under gravity, which could easily injure operators, damage expensive precision instruments inside the equipment (such as chemical synthesis modules, detectors, etc.), and may even cause containers containing radioactive drugs to rupture, resulting in a serious radioactive contamination accident.
[0006] There is a risk of impact: the opening and closing angle of the lead door is not limited, which can easily trap hands or cause abnormal noises when it hits equipment.
[0007] Therefore, an adjustment device for the buffer limit of arbitrary suspension of a lead door is proposed to address the above problems. Utility Model Content
[0008] The purpose of this utility model is to overcome the existing defects and provide an adjustment device for the arbitrary suspension and buffer limit of a lead door, which has a simple and durable structure.
[0009] To achieve the above objectives, this utility model provides the following technical solution: an adjustment device for arbitrarily hovering and buffering limit of a lead door, comprising a hovering limit adjustment component; the hovering limit adjustment component is installed at the top of the door pivot, the door pivot is connected to the side wall of the inner frame of the door, and the inner side of the inner frame of the door is connected to the lead door.
[0010] Preferably, the hovering limit adjustment assembly includes an inspection door adjustment seat, an installation groove is formed on the upper part of the inspection door adjustment seat, a disc damper is disposed in the installation groove, and the rectangular shaft at the top of the inspection door pivot is interference-fitted with the disc damper.
[0011] Preferably, the hovering limit adjustment assembly further includes a limit pin and a limit block, the lower end face of the maintenance door adjustment seat is connected to the limit block, a limit groove is formed in the limit block, the outer wall of the maintenance door shaft is connected to the limit pin, and the limit pin is slidably connected in the limit groove.
[0012] Preferably, it also includes two shock-absorbing blocks, both of which are connected to the limiting block and are located at both ends of the limiting groove.
[0013] Preferably, it also includes a bearing, which is disposed inside the adjustment seat of the inspection door, and the inner ring of the bearing is connected to the outer wall of the inspection door shaft; bearing retaining rings are respectively provided above and below the bearing.
[0014] Preferably, the limiting block is connected to the lower end face of the maintenance door adjustment seat by a second bolt.
[0015] Preferably, the shock absorber block and the limiting block are connected by a third bolt.
[0016] Preferably, one end of the inspection door adjustment seat is connected to a first bolt for adjusting its height.
[0017] Compared with existing technologies, the advantages of this utility model are as follows: This adjustable device for the arbitrary suspension and buffer limit of a lead door is absolutely safe, requires no electricity, and adopts a mechanical structure. When the disc of the disc damper contacts other components, friction generates resistance, thereby slowing down the movement and achieving suspension at any position. Its locking state does not rely on any electricity, fundamentally eliminating the risk of door falling due to power outages, circuit or electrical failures, ensuring extremely high safety. Stepless suspension provides flexible operation, overcoming the shortcomings of traditional ratchet and pin mechanisms that can only lock at a fixed point. It achieves stepless suspension at any height within the entire stroke range of the lead door, greatly facilitating operators to flexibly position the door according to actual needs. It is safe and reliable, with no risk of power outages. The entire system is a purely mechanical structure; the angle limit provides a physical hard stop, and the disc damper provides friction locking, providing double protection without the need for electricity, fundamentally eliminating the risk of loss of control. Adjustable presets offer strong adaptability. The position of the angle limiter can be flexibly designed according to the common workstation requirements of different equipment, making it highly versatile and adaptable to the process habits of different users. The structure is simple and durable. The added limit mechanism is simple, robust and durable, and will not increase the complexity of the system or the failure rate. Attached Figure Description
[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is an isometric view of the hovering limit adjustment component of this utility model; Figure 2 This is a bottom schematic diagram of the hovering limit adjustment component of this utility model; Figure 3 This is a schematic diagram showing the installation position of the hovering limit adjustment component of this utility model; Figure 4 This is a front view of the hovering limit adjustment component of this utility model; Figure 5 This is a partial cross-sectional view of the hovering limit adjustment component of this utility model; Figure 6 This is a detailed view of the position of the limiting groove of this utility model.
[0019] In the diagram: 1. Bearing; 2. First bolt; 3. Disc damper; 4. Limit block; 5. Second bolt; 6. Shock absorber block; 7. Third bolt; 8. Bearing retaining ring; 9. Inspection door adjustment seat; 10. Suspension limit adjustment assembly; 11. Mounting surface; 12. Inspection door pivot; 13. Limit pin; 14. Inspection door inner frame; 15. Lead door; 16. Limit groove. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] like Figure 1-6 As shown, an adjustment device for arbitrarily hovering and buffering limit of a lead door includes a hovering limit adjustment component 10; the hovering limit adjustment component 10 is installed at the top of the access door pivot 12, the access door pivot 12 is connected to the side wall of the access door inner frame 14, and the inner side of the access door inner frame 14 is connected to the lead door 15.
[0022] Specifically, the hovering limit adjustment assembly 10 includes an inspection door adjustment seat 9, an installation groove is opened on the inspection door adjustment seat 9, a disc damper 3 is installed in the installation groove, and the rectangular shaft at the top of the inspection door pivot 12 is interference-fitted with the disc damper 3.
[0023] Specifically, the hovering limit adjustment assembly 10 also includes a limit pin 13 and a limit block 4. The lower end face of the access door adjustment seat 9 is connected to the limit block 4, and a limit groove 16 is formed in the limit block 4. The outer wall of the access door shaft 12 is connected to the limit pin 13, and the limit pin 13 is slidably connected in the limit groove 16. The limit block 4 is connected to the lower end face of the access door adjustment seat 9 by a second bolt 5. The second bolt 5 is M5x35. It also includes two shock absorbers 6, both of which are connected to the limit block 4 and are located at both ends of the limit groove 16. The shock absorbers 6 are connected to the limit block 4 by a third bolt 7. The third bolt 7 is M4x30. It also includes a bearing 1, which is set inside the access door adjustment seat 9. The inner ring of the bearing 1 is connected to the outer wall of the access door shaft 12; bearing retaining rings 8 are respectively set above and below the bearing 1.
[0024] Specifically, the hovering and limiting adjustment component 10, through the combination of the disc damper 3 and the limiting pin 13, achieves hovering and limiting functions at any position. This allows the lead door to be precisely and stably hovered at any position within its vertical travel range, meeting diverse operational needs. It also ensures that in the event of sagging after prolonged use, the safety risks caused by its own weight can be manually corrected. The structure allowing for hovering at any angle improves the user experience of opening the door and reduces the inconvenience caused by installation deviations.
[0025] Specifically, the access door pivot 12 is installed on one side of the access door frame 14. The limiting pin 13 is welded into the pin hole on the access door pivot 12. The limiting block 4 has a limiting groove 16 inside. The limiting pin 13 on the access door pivot 12 rotates within the limited space in the limiting groove 16 to achieve the limiting function. The rectangular shaft at the top of the access door pivot 12 is installed with an interference fit with the disc damper 3. During the rotation of the access door pivot 12, it will drive the disc damper 3, which will provide a certain resistance through dry friction. The free rotation of the limiting pivot can achieve suspension at any position. After rotating to a certain angle, the limiting pin 13 of the access door pivot 12 will hit the shock absorber 6 to buffer the impact and avoid abnormal noise caused by the impact.
[0026] Specifically, one end of the maintenance door adjustment seat 9 is connected to a first bolt 2 for adjusting its own height. The suspension limit adjustment assembly 10 is installed on the mounting surface 11 and is leveled left and right by the first bolt 2 (M12x1.5x100) and the tensioning block to adjust the sagging caused by the weight of the lead door during long-term use.
[0027] This adjustable device for the lead door's arbitrary hovering and buffer limit is absolutely safe, requires no electricity, and employs a mechanical structure. When the disc of the disc damper contacts other components, friction generates resistance, thus slowing the movement and allowing for hovering at any position. Its locking state does not rely on any electricity, fundamentally eliminating the risk of the door falling due to power outages, circuit or electrical failures, ensuring extremely high safety. Stepless hovering provides flexible operation, overcoming the shortcomings of traditional ratchet and pin mechanisms that can only lock at a fixed point. It achieves stepless hovering at any height within the entire stroke range of the lead door, greatly facilitating operators to flexibly position the door according to actual needs. Safe and reliable, with no risk of power outages, the entire system is a purely mechanical structure. The angle limit provides a physical hard stop, and the disc damper provides friction locking, providing double protection and eliminating the risk of loss of control. Adjustable presets offer strong adaptability; the position of the angle limiter can be flexibly designed according to the common workstation requirements of different equipment, making it highly versatile and adaptable to different users' process habits. The structure is simple and durable. The added limit mechanism is simple, robust and durable, and will not increase the complexity of the system or the failure rate.
[0028] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model 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 this utility model should be included within the protection scope of this utility model.
Claims
1. An adjustment device for arbitrarily hovering and buffering limit of a lead door, characterized in that, Includes a hovering limit adjustment assembly (10); the hovering limit adjustment assembly (10) is installed at the top of the inspection door pivot (12), the inspection door pivot (12) is connected to the side wall of the inspection door inner frame (14), and the inner side of the inspection door inner frame (14) is connected to a lead door (15).
2. The adjusting device for arbitrary suspension and buffering limit of a lead door according to claim 1, characterized in that, The hovering limit adjustment assembly (10) includes a maintenance door adjustment seat (9), with an installation groove on the maintenance door adjustment seat (9), and a disc damper (3) installed in the installation groove. The rectangular shaft at the top of the maintenance door pivot (12) is interference-fitted with the disc damper (3).
3. The adjusting device for arbitrary suspension and buffering limit of a lead door according to claim 2, characterized in that, The hovering limit adjustment assembly (10) also includes a limit pin (13) and a limit block (4). The lower end face of the maintenance door adjustment seat (9) is connected to the limit block (4). A limit groove (16) is opened in the limit block (4). The outer wall of the maintenance door pivot (12) is connected to the limit pin (13). The limit pin (13) is slidably connected in the limit groove (16).
4. The adjusting device for arbitrary suspension and buffering limit of a lead door according to claim 3, characterized in that, It also includes two shock absorbers (6), both of which are connected to the limiting block (4) and are located at both ends of the limiting groove (16).
5. The adjusting device for arbitrary suspension and buffering limit of a lead door according to claim 2, characterized in that, It also includes a bearing (1), which is located inside the maintenance door adjustment seat (9). The inner ring of the bearing (1) is connected to the outer wall of the maintenance door shaft (12). Bearing retaining rings (8) are respectively provided above and below the bearing (1).
6. The adjusting device for arbitrary suspension and buffering limit of a lead door according to claim 3, characterized in that, The limiting block (4) is connected to the lower end face of the maintenance door adjustment seat (9) by the second bolt (5).
7. The adjusting device for arbitrary suspension and buffering limit of a lead door according to claim 4, characterized in that, The shock absorber (6) and the limiting block (4) are connected by a third bolt (7).
8. The adjusting device for arbitrary suspension and buffering limit of a lead door according to claim 2, characterized in that, One end of the maintenance door adjustment seat (9) is connected to a first bolt (2) for adjusting its own height.