Dynamic dust protection for threaded connection areas of a screw elevator

Abstract

This invention relates to the field of elevator maintenance and safety technology, specifically a dynamic dustproof device for the threaded connection area of ​​a screw elevator. It comprises a fixed dustproof membrane, a dynamic dustproof membrane, an adaptive winding and unwinding system, a channel structure, and an elevator dustproof nut. The fixed dustproof membrane is distributed around three sides of the screw, while the dynamic dustproof membrane is fixed to the elevator dustproof nut and moves with the elevator. The channel structure guides the dynamic dustproof membrane's up-and-down movement, achieving a seamless fit. The adaptive winding and unwinding system automatically adjusts the unfolding or shrinking of the dustproof membrane according to the elevator's operating status, ensuring real-time dustproof protection of the threaded connection area. This invention maintains constant tension in the dustproof membrane through an intelligent tension control system, preventing slackness or excessive tightness from affecting the protective effect. Compared to traditional static dustproof methods, this invention can dynamically adapt to the elevator's operating status, achieving all-round, efficient dustproofing, improving the durability and safety of screw elevators, and reducing maintenance costs.

Description

Technical Field

[0001] This invention relates to a dynamic dustproof device for the threaded connection area of ​​a screw elevator. Specifically, it achieves all-round dynamic dustproofing of the threaded connection area through the synergistic effect of an adaptive winding and unwinding machine, a channel structure, and a special dustproof nut. It belongs to the field of elevator maintenance and safety technology. Background Technology

[0002] Screw elevators, as efficient and safe vertical transportation tools, are widely used in modern buildings. The connection area between the screw and nut—its core component—is crucial to the elevator's operational stability. Despite continuous advancements in the design and manufacturing of screw elevators, current market measures for dust protection of the screw connection area are relatively lacking or have limited effectiveness.

[0003] In practical applications, the threaded connection area of ​​screw elevators is susceptible to contaminants such as dust and impurities. These contaminants can not only cause wear on the screw and nut, affecting the elevator's operating efficiency and lifespan, but also pose a threat to its safety. Currently, although some basic dustproof measures exist, such as simple seals or protective covers, these methods often cannot provide continuous and effective dust protection, especially when considering the durability issues of home elevators under long-term use.

[0004] Therefore, there is an urgent need for a solution that can effectively protect the threaded connection area of ​​screw elevators from dust and impurities in order to improve the overall performance and safety of elevators. Summary of the Invention

[0005] To address the aforementioned shortcomings, this invention provides a dynamic dustproof device for the threaded connection area of ​​a screw elevator, aiming to solve the problems of easy dust corrosion, difficult maintenance, and insufficient reliability of protective facilities in the existing technology at the screw-nut connection point. This invention is achieved through the following technical solution:

[0006] A dynamic dustproof device for the threaded connection area of ​​a screw elevator comprises a fixed dustproof membrane, a dynamic dustproof membrane, an adaptive winding and unwinding machine system, a channel structure, and an elevator dustproof nut. Its features include: the fixed dustproof membrane is distributed around three sides of the screw in the screw elevator; the dynamic dustproof membrane is fixedly connected to the elevator dustproof nut in upper and lower parts and moves up and down with the elevator; the channel structure is adhered to the fixed dustproof membrane to guide the up and down movement of the dynamic dustproof membrane and maintain a seamless connection; the adaptive winding and unwinding machine is located at the upper and lower ends of the elevator screw and connected to the dynamic dustproof membrane, automatically unfolding or shrinking the dynamic dustproof membrane according to the up and down movement of the dustproof nut; the dustproof nut is tightly attached to the threaded connection area and moves, acting as a traditional nut and, through its connection with the dynamic dustproof membrane, driving the dynamic dustproof membrane to move up and down with the rotation of the screw, thus achieving real-time dustproof protection for the threaded connection area.

[0007] Furthermore, in the aforementioned channel structure, a fixed channel is installed at the junction of the fixed dustproof membrane and the dynamic dustproof membrane around the screw. This channel matches the trajectory of the nut and is fixed to the screw elevator structure. The fixed dustproof membrane is inserted into the channel, so that it surrounds the screw part of the screw elevator and is fixed inside the channel. The edge of the movable dustproof membrane is designed to match the shape of the channel to ensure that the dustproof membrane can be smoothly installed into the channel.

[0008] Furthermore, in the adaptive winding and unwinding machine system, the user sets the tension range of the dynamic dustproof film through an interface; these settings are input into the control system. The microcontroller or PLC within the control system processes these inputs according to a preset algorithm logic and accordingly controls the winding and unwinding machine motor driver and tension sensor. The motor driver adjusts the adaptive winding mechanism to achieve precise winding and unwinding of the dustproof film, while the tension sensor monitors the actual tension of the dustproof film in real time to ensure it conforms to the user-set range. Through this closed-loop control mechanism, the entire system achieves precise control and dynamic adjustment of the dustproof film tension in the threaded connection area of ​​the screw conveyor.

[0009] Furthermore, compared to screw elevators without dustproof treatment, the dustproof nut of this invention, using the dynamic dustproof device, can not only improve the sealing and dust resistance of the screw elevator's threaded connection area, but also automatically adjust the range of the dustproof film according to the actual operating conditions of the elevator, achieving all-round dustproofing, extending the service life of the threaded connection components, and improving the safety and reliability of the entire elevator system.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] (1) All-round dynamic dust prevention improves the durability of screw elevators. Through the synergistic effect of adaptive winding and unwinding machine, channel structure and dustproof nut, the present invention can adjust the coverage of dynamic dustproof film in real time to ensure that the threaded connection area is always in an effective protection state, effectively preventing dust and impurities from entering, thereby reducing the wear of screw and nut and improving the service life of elevator.

[0012] (2) Intelligent control of tension enhances the stability of the dustproof system. An adaptive winding and unwinding machine system is adopted, combined with a tension sensor and a closed-loop control mechanism, to realize the automatic adjustment of the tension of the dustproof film. This ensures that the dustproof film will not be too loose and affect the sealing, nor too tight and increase the system resistance during elevator operation, thereby improving the overall stability and reliability of the dustproof system.

[0013] (3) Optimize maintenance costs and improve elevator safety. Traditional dust prevention measures often require frequent maintenance or replacement. However, this invention significantly reduces the maintenance frequency and the risk of failure caused by screw contamination through the automatic adjustment of the dynamic dust prevention film and the efficient sealing design, thereby improving the safety of elevator operation and reducing long-term maintenance costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 This is a cross-sectional view of the dustproof membrane.

[0016] Figure 3 This is a magnified view of a portion of the dynamic dustproof film.

[0017] Figure 4 This is the adaptive control flowchart for the winding machine. Detailed Implementation

[0018] like Figure 1-3 As shown, a dynamic dustproof device for the threaded connection area of ​​a screw elevator includes a fixed dustproof membrane (101), a dynamic dustproof membrane (102), an adaptive winding and unwinding machine system (103), a channel structure (301), and an elevator dustproof nut (202). The fixed dustproof membrane (101) is arranged around the screw (201) in a three-sided covering structure. The dynamic dustproof membrane (102) forms a synchronous motion mechanism with the dustproof nut (202) through a sliding connector. The adaptive winding and unwinding machine system (103) includes a bidirectional drive motor (104) and a tension feedback module (105) integrated at both ends of the screw (201).

[0019] Furthermore, such as Figure 2As shown, the elevator dustproof nut (202) is tightly attached to the threaded connection area and connects with the dynamic dustproof membrane (the connection method varies depending on the elevator model). It functions as a traditional nut, driving the elevator up and down, and also drives the dustproof membrane up and down when the screw rotates. In addition, the dynamic dustproof membrane is made of flexible polymer composite material, which has both sealing and fatigue resistance properties. It adopts a split structure design, including a main bearing part (203) and a dustproof skirt (204). The main bearing part (203) is provided with a trapezoidal thread engagement surface. The dustproof skirt (204) is linked with the dynamic dustproof membrane (102), and its bottom is provided with a dust scraping blade (205) that maintains a dynamic gap of 0.1-0.3mm with the surface of the screw (201).

[0020] Furthermore, such as Figure 3 As shown, the channel structure (301) includes a U-shaped guide channel (302) and a sealing strip (303). The U-shaped guide channel (302) extends along the axis of the screw (201), and its inner cavity is provided with a self-lubricating polymer gasket (304). The sealing strip (303) forms a sealed connection with the edge of the dynamic dustproof membrane (102). This avoids a decrease in dustproof effect due to excessive deformation of the dustproof membrane during operation.

[0021] Furthermore, such as Figure 4 As shown, the adaptive winding and unwinding machine system includes a tension closed-loop control unit. This unit monitors the reel speed in real time using a Hall sensor, and combined with the feedback signal from a strain gauge tension detector, a PID controller dynamically adjusts the torque output of the servo motor to achieve constant tension control of the dustproof film within a tension accuracy range of ±5N. This maintains appropriate tension and avoids protective failure caused by excessive looseness or tightness.

Claims

1. A dynamic dustproof device for a screw elevator, comprising a fixed dustproof membrane, a dynamic dustproof membrane, an adaptive winding and unwinding machine system, a channel structure, and an elevator dustproof nut, characterized in that, The fixed dustproof membrane is distributed on three sides of the screw in the screw elevator. The dynamic dustproof membrane is divided into upper and lower parts and is fixed to the elevator dustproof nut, and moves up and down with the elevator. The channel structure is bonded to the fixed dustproof membrane and is used to guide the up and down movement of the dynamic dustproof membrane and maintain the seamless connection of the dustproof membrane. The adaptive winding and unwinding machine is set at the upper and lower ends of the elevator screw and is connected to the dynamic dustproof membrane. It is used to automatically unfold or shrink the dynamic dustproof membrane according to the movement of the dustproof nut. The elevator dustproof nut is close to the threaded connection area and moves, which not only plays the role of a traditional nut, but also achieves real-time dust protection of the threaded connection area through linkage with the dynamic dustproof membrane.

2. The dynamic dustproof device as described in claim 1, characterized in that, The channel structure has a fixed channel at the junction of the fixed dustproof membrane and the dynamic dustproof membrane around the screw. The channel matches the trajectory of the dustproof nut and is fixed to the screw elevator structure to ensure smooth sliding of the dustproof membrane.

3. The dynamic dustproof device as described in claim 1, characterized in that, The adaptive winding and unwinding machine system includes a motor driver, a tension sensor, and a control unit. The control unit receives the tension setting value input by the user and adjusts the winding and unwinding machine motor driver through a closed-loop control mechanism to keep the tension of the dynamic dustproof film within the set range.

4. The dynamic dustproof device as described in claim 1, characterized in that, The elevator dustproof nut is equipped with a dustproof film fixing structure on the outside, which enables the dustproof film to be reliably connected and move with the nut, ensuring full-time coverage of the threaded connection area.

5. The dynamic dustproof device as described in claim 1, characterized in that, The dynamic dustproof membrane is made of flexible polymer composite material, which has both sealing and fatigue resistance properties. Its edges are reinforced to enhance its compatibility with the channel structure and prevent the dustproof membrane from deforming during operation, thus reducing its dustproof effect.

6. The dynamic dustproof device as described in claim 1, characterized in that, The inner wall of the channel structure is coated with a low-friction, wear-resistant coating to reduce frictional resistance during the sliding of the dynamic dustproof film and improve the service life of the system.

7. The dynamic dustproof device as described in claim 1, characterized in that, The control unit of the adaptive winding and unwinding machine system adopts a PID controller, monitors the winding speed through a Hall sensor, and dynamically adjusts the torque output of the servo motor in combination with the feedback signal of the strain gauge tension detector to achieve constant tension control of the dustproof film tension, with a control accuracy range of ±5N.

Images