A lift mechanism for a sand valve access door

Abstract

This utility model discloses a lifting mechanism for a sand-flushing valve maintenance door, relating to the technical field of sand-flushing valve maintenance equipment. It includes a door frame, a door body, a drive assembly, an adaptive compensation mechanism, and a guide monitoring mechanism. A PLC controller and decorative panel are located on the front side of the door frame. The door body is slidably connected to the inner side of the door frame. The drive assembly is installed at the top of the door frame and is detachably connected to the door body via the adaptive compensation mechanism, forming a modular, split structure. The adaptive compensation mechanism includes a connecting seat, a movable ball, and a connecting rod, enabling multi-directional swaying of the door body to compensate for errors. The guide monitoring mechanism includes a guide pulley and a distance sensor, constraining the vertical movement of the door body and monitoring the lifting status in real time. This utility model is convenient to install and maintain, operates smoothly and reliably, can accurately locate and promptly warn of faults, and effectively improves the performance and safety of the sand-flushing valve maintenance door.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering equipment, and in particular to a lifting mechanism for a sand flushing valve maintenance gate. Background Technology

[0002] In water conservancy projects, facilities such as sand flushing valves and drainage holes require regular maintenance. Inspection gates are crucial equipment for ensuring the safe conduct of maintenance operations. Currently, the lifting mechanisms of inspection gates mostly adopt wire rope winch or sprocket and chain designs. These traditional lifting mechanisms have significant drawbacks: Firstly, the positioning and self-locking reliability is poor. The steel wire rope or chain has elastic elongation characteristics, which makes it impossible to achieve precise stroke control. Moreover, when the door is raised or lowered, it is easy to jam and the alignment requirements are high. Affected by civil construction errors, foundation settlement or track deformation, the door is prone to jamming, wear and even "stuck" during the lifting or lowering process, which can damage the equipment or motor. Secondly, installation and transportation are inconvenient. Traditional lifting mechanisms are mostly rigidly connected or separately designed, with large overall lifting weight and volume, requiring large lifting equipment, which increases the difficulty and cost of operation, and subsequent maintenance and disassembly are also very complicated. To address the aforementioned issues, this utility model provides a lifting mechanism for a sand flushing valve inspection door. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this utility model provides a lifting mechanism for a sand flushing valve inspection door, which solves the problems mentioned in the background.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a lifting mechanism for a sand flushing valve inspection door, including a door frame, a door body slidably connected to the inner side of the door frame, and a drive component for lifting and lowering the door body is provided at the top of the door frame. A guide monitoring mechanism is provided between the door body and the door frame, and an adaptive compensation mechanism is provided between the drive component and the door body. The drive component is detachably connected to the door body through the adaptive compensation mechanism. The guidance monitoring mechanism includes two sets of guide pulleys symmetrically installed on both sides of the door, and fixed plates installed at the top of both sides of the door. A distance sensor is embedded in the upper surface of the fixed plate.

[0005] As a further technical solution of this utility model, each set of guide pulleys consists of two pulleys, and the inner sidewall of the door frame is symmetrically provided with sliding grooves. The guide pulleys roll in the sliding grooves, and the door body slides up and down in the sliding grooves through the two sets of guide pulleys on both sides.

[0006] As a further technical solution of this utility model, the drive assembly includes a drive motor installed at the center of the top of the door frame and a reducer connected to the output end of the drive motor. The output end of the reducer is connected to a lifting screw, and a lifting seat is threaded onto the lifting screw.

[0007] As a further technical solution of this utility model, the adaptive compensation mechanism includes two connecting seats symmetrically installed at the top rear side of the door body. The upper surface of the two connecting seats is provided with a ball groove, and a movable ball is movably installed in the ball groove. A connecting rod is integrally connected to the top center of the movable ball, and the top ends of the two connecting rods are fixed to both sides of the lower surface of the lifting seat.

[0008] As a further technical solution of this utility model, the lifting seat is hinged to the connecting seat ball through a connecting rod and a movable ball, the two connecting seats are fixed to the door body by bolts, the lifting seat and the lifting screw are threadedly connected, and when the door body rises, the lifting screw is located between the two connecting seats.

[0009] As a further technical solution of this utility model, a PLC controller is installed on the front side of the door frame, and a decorative panel is also provided on the upper front side of the door frame. When the door body is raised and lowered to the top inside the door frame, it is located exactly behind the decorative panel.

[0010] This utility model provides a lifting mechanism for a sand flushing valve inspection door, which has the following advantages compared with the prior art: 1. The lifting mechanism of the sand flushing valve maintenance door designed in this paper uses a drive component to control the lifting of the door frame and the door body. Since the screw drive is a rigid drive with no elastic deformation, the transmission accuracy is high, which can realize the precise control of the door body position. The lifting process is smooth and impact-free, which meets the high precision requirements of the maintenance operation for the door body positioning. Moreover, by utilizing the self-locking principle of the threaded pair formed between the lifting screw and the lifting seat, the door body can be safely stopped at any position within the stroke, which fundamentally eliminates the accident of falling caused by brake failure. No additional braking device is required, which simplifies the structure and improves safety.

[0011] 2. The lifting mechanism of the sand flushing valve maintenance door designed in this paper adds a guide monitoring mechanism on both sides of the door body. The cooperation of the guide pulley and the slide groove ensures the accuracy of the movement direction. Moreover, the ball joint connection between the adaptive compensation mechanism and the lifting seat can release the slight misalignment degree of freedom. Even if there is a slight tilt or deformation in the door groove, the door body can still run smoothly, avoiding stiffness, wear and motor overload, and extending the service life of the equipment.

[0012] 3. The lifting mechanism of the sand flushing valve maintenance gate designed in this paper adopts a detachable method for the drive component, adaptive compensation mechanism and gate body, so as to realize modular assembly, which can be separated during transportation and hoisting, reducing the weight and volume of a single hoisting, eliminating the need for large lifting equipment, and simplifying the operation process and reducing costs when installing or maintaining on site by simply connecting the drive component to the gate body. Attached Figure Description

[0013] Figure 1 A schematic diagram of the lifting mechanism for a sand flushing valve maintenance door; Figure 2 A schematic diagram of the lifting mechanism for a sand flushing valve maintenance door; Figure 3 A schematic diagram of the lifting mechanism for a sand flushing valve maintenance door; Figure 4 This is a schematic diagram of the lifting mechanism for a sand flushing valve maintenance door.

[0014] In the diagram: 1. Door frame; 11. PLC controller; 12. Slide rail; 13. Decorative panel; 2. Door body; 21. Guide pulley; 22. Fixing plate; 23. Distance sensor; 3. Drive assembly; 31. Drive motor; 32. Reducer; 33. Lifting screw; 4. Connecting seat; 41. Movable ball; 42. Connecting rod; 43. Lifting seat. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-4This utility model provides a technical solution for the lifting mechanism of a sand-flushing valve maintenance door: a lifting mechanism for a sand-flushing valve maintenance door includes a door frame 1, a PLC controller 11 installed on the front side of the door frame 1, and a decorative plate 13 provided on the upper front side of the door frame 1. When the door body 2 is raised and lowered to the top inside the door frame 1, it is located on the back side of the decorative plate 13, ensuring the clean appearance of the equipment. The door body 2 is slidably connected to the inner side of the door frame 1, and a drive assembly 3 for raising and lowering the door body 2 is provided at the top of the door frame 1. The drive assembly 3 includes a drive motor 31 installed at the center of the top of the door frame 1 and a reducer 32 connected to the output end of the drive motor 31. The output end of the reducer 32 is connected to a lifting screw 33, and a lifting seat 43 is threadedly connected to the lifting screw 33. It should be noted that the lifting screw 33 adopts a precision trapezoidal thread, forming a trapezoidal thread pair with the lifting seat 43. The helix angle of the trapezoidal thread pair is smaller than the friction angle. The trapezoidal thread of the lifting screw 33 is made of high-strength alloy steel to achieve a self-locking function. An adaptive compensation mechanism is provided between the drive component 3 and the door body 2. The drive component 3 and the door body 2 are detachably connected through the adaptive compensation mechanism, forming a split modular structure, which is convenient for transportation, installation and maintenance.

[0017] The adaptive compensation mechanism includes two connecting seats 4 symmetrically installed at the rear top of the door body 2. The upper surface of each connecting seat 4 is provided with a ball groove, and a movable ball 41 is movably installed in the ball groove. A connecting rod 42 is integrally connected to the top center of the movable ball 41. The tops of the two connecting rods 42 are fixed to the lower surfaces of the lifting seat 43, so that the lifting seat 43 and the connecting seat 4 form a ball hinge, allowing the door body 2 to swing in multiple directions within a range of ±2° to compensate for installation errors or deformation. The two connecting seats 4 are fixed to the door body 2 by bolts. The lifting seat 43 and the lifting screw 33 are threadedly connected. When the door body 2 rises, the lifting screw 33 is located between the two connecting seats 4 to avoid interference with other components.

[0018] A guide monitoring mechanism is provided between the door body 2 and the door frame 1. The guide monitoring mechanism includes two sets of guide pulleys 21 symmetrically installed on both sides of the door body 2, and fixed plates 22 installed on the top of both sides of the door body 2. Distance sensors 23 are embedded in the upper surface of the fixed plates 22, which can monitor the lifting height of the door body 2 in real time and transmit the signal to the PLC controller 11. At the same time, when the tilt angle of the door body 2 is too large, or when the difference in distance between the top of the door body 2 and the door frame 1 detected by the two distance sensors 23 is large, it can issue a timely reminder, which is convenient for reminding staff to repair in time. It should be noted that the PLC controller 11 is integrated with an audible and visual alarm, which can issue a warning signal in time when the tilt angle of the door body 2 is too large or when it is stuck. There are two guide pulleys 21 in each set. The inner side wall of the door frame 1 is symmetrically provided with sliding grooves 12. The guide pulleys 21 roll in the sliding grooves 12. The door body 2 slides up and down in the sliding grooves 12 through the two sets of guide pulleys 21 on both sides, which restricts the door body 2 to move only in the vertical direction.

[0019] The working principle of this utility model is as follows: During installation, the door frame 1 is first fixed in the preset installation position, and then the door body 2 and the drive component 3 are hoisted separately. The adaptive compensation mechanism is connected to the lifting screw 33 through the lifting seat 43, and then the connecting seat 4 is fixed to the door body 2 by bolts to complete the docking installation of the drive component 3 and the door body 2. No large lifting equipment is required, and the operation is convenient. When lifting the door 2, the drive motor 31 is started by the PLC controller 11 (with an up button). After being reduced by the reducer 32, the drive motor 31 drives the lifting screw 33 to rotate. The lifting screw 33 and the lifting seat 43 are engaged by a threaded pair, which drives the lifting seat 43 to rise. Then, the door 2 is pulled upward along the slide 12 through the connecting rod 42, the movable ball 41 and the connecting seat 4. Moreover, the distance sensor 23 monitors the position of the door 2 in real time and feeds it back to the PLC controller 11 to achieve precise positioning. Once the door 2 has risen to the target height, the drive motor 31 stops running, and the trapezoidal thread pair of the lifting screw 33 achieves self-locking, so the door 2 can be reliably stopped without the need for an additional braking device. If there is a slight tilt or deformation in the door groove, the movable ball 41 rotates in the ball groove, allowing the door 2 to wobble slightly, thus avoiding jamming and wear. When lowering the door body 2, the PLC controller 11 (with a descent button) controls the drive motor 31 to rotate in the reverse direction, the lifting screw 33 rotates in the reverse direction to drive the lifting seat 43 to descend, and the door body 2 is smoothly lowered along the slide 12. The distance sensor 23 monitors the position in real time to ensure that the lowering process is accurate and controllable. In addition, by utilizing the precise detection of two distance sensors 23, when the difference between the distance values ​​detected by the two distance sensors 23 is large, it indicates that the door 2 is seriously tilted or stuck. At this time, a signal will be transmitted to the PLC controller 11, which will control the audible and visual alarm to sound an alarm, so that staff can repair it in time. When the drive assembly 3 needs to be repaired, the fixing bolts between the connecting seat 4 and the door 2 can be removed to separate the drive assembly 3 from the door 2, and the drive assembly 3 can be hoisted separately for repair. The operation is simple.

[0020] In this embodiment, the drive motor 31 can be a servo motor to improve positioning accuracy; the distance sensor 23 can be a laser distance sensor for high measurement accuracy; the trapezoidal thread of the lifting screw 33 is made of high-strength alloy steel to ensure structural strength and wear resistance.

[0021] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A lifting mechanism for a sand flushing valve inspection door, comprising a door frame (1), characterized in that, The door frame (1) is slidably connected to the door body (2), and the top of the door frame (1) is provided with a drive component (3) for lifting and lowering the door body (2). A guide monitoring mechanism is provided between the door body (2) and the door frame (1), and an adaptive compensation mechanism is provided between the drive component (3) and the door body (2). The drive component (3) forms a detachable connection with the door body (2) through the adaptive compensation mechanism. The guidance monitoring mechanism includes two sets of guide pulleys (21) symmetrically installed on both sides of the door (2), and a fixing plate (22) installed on the top of both sides of the door (2). A distance sensor (23) is embedded on the upper surface of the fixing plate (22).

2. The lifting mechanism for a sand flushing valve inspection door according to claim 1, characterized in that, Each set of guide pulleys (21) consists of two pulleys. The inner sidewall of the door frame (1) is symmetrically provided with a sliding groove (12). The guide pulleys (21) roll in the sliding groove (12). The door body (2) slides up and down in the sliding groove (12) through the two sets of guide pulleys (21) on both sides.

3. The lifting mechanism for a sand flushing valve inspection door according to claim 1, characterized in that, The drive assembly (3) includes a drive motor (31) installed at the top center of the door frame (1) and a reducer (32) connected to the output end of the drive motor (31). The output end of the reducer (32) is connected to a lifting screw (33), and a lifting seat (43) is threaded onto the lifting screw (33).

4. The lifting mechanism for a sand flushing valve inspection door according to claim 3, characterized in that, The lifting screw (33) adopts a precision trapezoidal thread and forms a trapezoidal thread pair with the lifting seat (43). The helix angle of the trapezoidal thread pair is smaller than the friction angle. The trapezoidal thread of the lifting screw (33) is made of high-strength alloy steel.

5. The lifting mechanism for a sand flushing valve inspection door according to claim 1, characterized in that, The adaptive compensation mechanism includes two connecting seats (4) symmetrically installed at the rear top of the door body (2). The upper surface of the two connecting seats (4) is provided with a ball groove, and a movable ball (41) is movably installed in the ball groove. A connecting rod (42) is integrally connected to the middle of the top of the movable ball (41). The tops of the two connecting rods (42) are fixed to both sides of the lower surface of the lifting seat (43).

6. The lifting mechanism for a sand flushing valve inspection door according to claim 3, characterized in that, The lifting seat (43) is spherically hinged to the connecting seat (4) via the connecting rod (42) and the movable ball (41). The two connecting seats (4) are fixed to the door body (2) by bolts. The lifting seat (43) and the lifting screw (33) are threadedly connected. When the door body (2) rises, the lifting screw (33) is located between the two connecting seats (4).

7. The lifting mechanism for a sand flushing valve inspection door according to claim 1, characterized in that, A PLC controller (11) is installed on the front side of the door frame (1). The PLC controller (11) also integrates an audible and visual alarm. The distance sensor (23) is connected to the PLC controller (11) via signal. A decorative panel (13) is also provided on the upper front side of the door frame (1). When the door body (2) is raised and lowered to the top inside the door frame (1), it is located on the back side of the decorative panel (13).

Images