Reducing adjustable pipeline cleaning device for water conservancy project

Abstract

The invention relates to the technical field of hydraulic engineering, in particular to a variable-diameter adjustable pipeline cleaning device for hydraulic engineering, which comprises a rotating cylinder, a plurality of groups of telescopic brush assemblies, a variable-diameter adjusting assembly, a rotating rod and a transmission assembly, the variable-diameter adjusting assemblies are arranged on the rotating cylinder and can stretch out and draw back in the radial direction of the rotating cylinder, the variable-diameter adjusting assemblies and the telescopic brush assemblies are arranged at intervals, the rotating rod is axially arranged in the rotating cylinder, the telescopic brush assemblies and the variable-diameter adjusting assemblies are in linkage with the rotating rod, and the rotating cylinder is in linkage with the transmission assembly. The rotating cylinder rotates to drive the telescopic brush assembly to clean the inner wall of the pipeline. The rotating rod rotates to drive the telescopic brush assembly and the variable-diameter adjusting assembly to stretch out and draw back synchronously so as to adapt to pipelines with different pipe diameters, composite cleaning is conducted on the inner wall of the pipeline in the mode that the telescopic brush assembly and the variable-diameter adjusting assembly are combined, and the overall strength of the device can be enhanced through the variable-diameter adjusting assembly.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy projects, and in particular to a diameter-adjustable pipeline cleaning device for water conservancy projects. Background Art

[0002] In the field of water conservancy, pipelines are critical infrastructure for water transportation and drainage. The cleanliness of their inner walls directly affects the operational efficiency and safety of water conservancy systems. Traditional pipe cleaning devices have exposed numerous structural flaws over long-term use, making them difficult to adapt to the diverse pipeline maintenance needs of modern water conservancy projects.

[0003] In the prior art, most conventional cleaning devices utilize a fixed-diameter cleaning structure, cleaning the inner wall of pipes through a single rotational or linear motion. For example, some devices rely solely on a motor to drive the brush's rotation, with manual propulsion mechanisms moving it within the pipe. While this approach provides basic cleaning performance for straight pipes of uniform diameter, it exhibits significant shortcomings when encountering complex pipes with varying diameters, bends, or bifurcations. For one thing, the fixed-diameter cleaning structure cannot adapt to changes in pipe diameter. As the pipe's inner diameter increases, the brush cannot reach the pipe wall, creating a blind spot. However, as the pipe diameter decreases, the device's oversize can cause jamming. Furthermore, the brush encounters a series of challenging issues when extending to accommodate pipes of varying diameters. When the telescopic brush assembly is extended to an excessive length, the stress distribution within its internal structure changes significantly. From a material mechanics perspective, an overly long telescopic brush acts like a slender cantilever beam; its bending deformation increases dramatically when subjected to external forces. Specifically, the stiffness of the telescopic brush assembly decreases exponentially with increasing extension. The direct consequence of insufficient rigidity is that the telescopic brush assembly is very likely to swing and deflect during the rotation of the cleaning device.

[0004] This oscillatory deviation isn't a simple side-to-side shake; it's a complex, irregular motion. Initially, due to a gap between the telescopic brush assembly and the pipe's inner wall, as the speed gradually increases, the brush assembly begins to experience the combined effects of centrifugal force and friction from the pipe's inner wall. Due to its insufficient rigidity, it can't effectively resist these external forces, causing it to begin oscillating. This oscillation intensifies as the speed increases, preventing the brush from cleaning the pipe's inner wall along its intended trajectory. The end result is that some areas of the pipe's inner wall are repeatedly cleaned, while other areas may not be cleaned at all, creating blind spots and severely impacting the overall cleaning effectiveness.

[0005] On the other hand, the cleaning action of traditional devices is single, and they can only contact the pipe wall through the rotating brush surface. It is difficult to completely remove firmly attached dirt or deposited impurities in the corners through simple rotational motion. Repeated cleaning or manual intervention is often required, resulting in low efficiency.

[0006] China's public patent announcement number CN120133246A discloses a pipe cleaning device for water conservancy projects. The device, through the coordination of a base, a rotating drum, a movable motor, a threaded rod, a telescopic drum, a telescopic rod, and a cleaning brush, can, to a certain extent, clean the inner wall of the pipe. When the device is in operation, the movable motor is turned on to drive the threaded rod to rotate, so that the movable base moves. At the same time, the rotating motor is turned on to drive the rotating shaft to rotate, so that the rotating drum and the cleaning brush rotate. The rotating drum and the cleaning brush are driven to move repeatedly left and right by the coordination of components such as an eccentric ring, an air bag, and an air pressure chamber to improve the cleaning effect. However, the cleaning brush in the current device is too long, resulting in insufficient rigidity. It is prone to swinging and offsetting during rotation. The overall strength needs to be strengthened, and more manual intervention is required, which affects the cleaning efficiency and effect. Summary of the Invention

[0007] In response to the above problems, a variable-diameter adjustable pipe cleaning device for water conservancy projects is provided. By cooperating with the variable-diameter adjustment component and the telescopic brush, the rotating cylinder always moves along the axial direction of the pipe, so that the telescopic brush component can better clean the inner wall of the pipe, solving the problem of poor cleaning efficiency caused by insufficient rigidity of the cleaning brush when extended in traditional devices.

[0008] In order to solve the problems of the existing technology, the present invention provides a variable-diameter adjustable pipe cleaning device for water conservancy projects, including a rotating cylinder, a telescopic brush assembly, a variable-diameter adjustment assembly, a rotating rod and a transmission assembly. Several groups of the telescopic brush assemblies are connected to the rotating cylinder and can be extended and retracted radially along the rotating cylinder. Several groups of the variable-diameter adjustment assemblies are arranged on the rotating cylinder and can be extended and retracted radially along the rotating cylinder. The variable-diameter adjustment assembly and the telescopic brush assembly are arranged at intervals. The rotating rod is axially arranged in the rotating cylinder. The telescopic brush assembly and the variable-diameter adjustment assembly are linked to the rotating rod, and the rotating cylinder is linked to the transmission assembly. The rotation of the rotating cylinder can drive the telescopic brush assembly to clean the inner wall of the pipe.

[0009] Preferably, a rotating bevel gear is fixed at one end of the rotating rod, and the telescopic brush assembly includes a threaded rod, a driven bevel gear, a brush plate and a connecting tube. A driven bevel gear is fixed at one end of the threaded rod, and the driven bevel gear is meshed with the rotating bevel gear. The other end of the threaded rod passes through the wall of the rotating cylinder along the radial direction of the rotating cylinder. The brush plate is connected to the connecting cylinder, and the inner wall of the connecting cylinder is meshed with the outer wall of the threaded rod.

[0010] Preferably, the outer wall of the rotating rod is provided with a threaded section, and the rotating cylinder is provided with a accommodating through hole. The variable diameter adjustment assembly includes an adjusting ring, a telescopic rod, a variable diameter adjustment rod and a sliding block. The adjusting ring is engaged with the threaded section, one end of the telescopic rod is connected to the adjusting ring and the other end is connected to the variable diameter adjustment rod. The telescopic rod can move in the accommodating through hole, one end of the variable diameter adjustment rod is hinged to the outer wall of the rotating cylinder, and the other end of the variable diameter adjustment rod is hinged to a sliding block. The sliding block is restricted on the rotating cylinder and can move axially along the rotating cylinder.

[0011] Preferably, the telescopic rod includes a fixed rod and a sleeve, the fixed rod is fixedly arranged on the adjusting ring, one end of the sleeve is connected to the variable diameter adjusting rod, the sleeve is sleeved on the outer wall of the fixed rod, and the movement of the adjusting ring can drive the sleeve to move up and down on the fixed rod.

[0012] Preferably, a slide rail is provided on the outer wall of the rotating cylinder, and the sliding block is restricted from moving during the sliding.

[0013] Preferably, the variable diameter adjustment rod includes an auxiliary block and two groups of connecting rods, wherein one end of the connecting rods of one group is hinged to the outer wall of the rotating cylinder and the other end is hinged to the auxiliary block, and the other end of the connecting rods of the other group is hinged to the auxiliary block and the other end is hinged to the sliding block, and the auxiliary block can contact the inner wall of the pipe.

[0014] Preferably, the transmission assembly includes a rotating main shaft, a first motor and a clutch assembly. One end of the rotating main shaft is connected to the rotating cylinder and can drive the rotating cylinder to rotate. The output shaft of the first motor is connected to the rotating rod through the clutch assembly to drive the first motor. The transmission shaft can drive the telescopic brush assembly and the variable diameter adjustment assembly to radially extend and retract on the rotating cylinder.

[0015] Preferably, the clutch assembly includes a driving disk, a driven disk, a centrifugal block and a torsion spring. The center of the driving disk is connected to the first motor output shaft. Receiving grooves are evenly distributed on the driving disk. One end of the torsion spring is restricted in the receiving groove and the other end is connected to the centrifugal block. The driven disk is connected to the rotating rod. Several slots are evenly arranged on the driven disk, and the centrifugal block can enter the slots.

[0016] Preferably, the active disk includes a rotating disk body, a movable disk and a rotating tube, the rotating disk body is provided with a plurality of the accommodating grooves, the movable disk is provided with a plurality of protrusions, the protrusions extend through and into the accommodating grooves and are connected to the torsion spring, a threaded rotating tube is provided at the center of the movable disk, the output shaft of the first motor passes through the rotating tube and is connected to the rotating disk body, the rotating tube can be rotatably sleeved on the output shaft of the first motor, and rotating the rotating tube can drive the movable disk to move axially along the output shaft of the first motor.

[0017] Preferably, the transmission assembly further includes a second motor, and the output shaft of the second motor is connected to the rotating main shaft.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention performs composite cleaning on the inner wall of the pipe by combining a telescopic brush assembly with a variable diameter adjustment assembly, thereby avoiding the problem of insufficient rigidity of the telescopic brush assembly due to excessive extension, resulting in swinging and deviation, and inability to fully cover the inner wall of the pipe. The variable diameter adjustment assembly can enhance the overall strength of the device.

[0020] 2. The present invention arranges a telescopic brush assembly and a variable diameter adjustment assembly to be linked to the rotating rod at the same time, so that the telescopic brush assembly and the variable diameter adjustment assembly can contact the inner wall of the pipe at the same time, so that the rotating cylinder forms an annular rigid frame, which disperses the weight of the device and the cleaning resistance to multiple points on the inner wall of the pipe, and upgrades the single-point force of the traditional telescopic brush to a uniformly distributed force in an annular shape.

[0021] 3. The present invention sets a clutch assembly between the output rod of the first motor and the rotating rod. The setting of the clutch assembly can make the connection resistance between the active disk and the transmission disk in the clutch assembly increase suddenly when the telescopic brush assembly and the variable diameter adjustment assembly contact the inner wall of the pipe, so that the connection between the active disk and the driven disk is broken. The pressure sensor in the driven disk triggers the control to cut off the power of the first motor, which can avoid idling wear of the first motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The utility model is a schematic diagram of the overall structure of a diameter-adjustable pipe cleaning device for water conservancy projects of the present invention.

[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of a variable diameter adjustable pipe cleaning device for water conservancy projects of the present invention. Figure 1 .

[0024] Figure 3 This is a schematic diagram of the cross-sectional structure of a variable diameter adjustable pipe cleaning device for water conservancy projects of the present invention. Figure 2 .

[0025] Figure 4The present invention is a schematic structural diagram of a diameter-adjustable pipe cleaning device for water conservancy projects (excluding the rotating cylinder).

[0026] Figure 5 The present invention is a schematic structural diagram of a rotating drum of a diameter-adjustable pipe cleaning device for water conservancy projects.

[0027] Figure 6 The present invention is a schematic diagram of the connection structure of a telescopic brush assembly and a rotating rod of a variable diameter adjustable pipe cleaning device for water conservancy projects.

[0028] Figure 7 The present invention is a schematic diagram of the connection structure of a rotating cylinder, a diameter-adjusting assembly and a rotating rod of a diameter-adjustable pipe cleaning device for water conservancy projects.

[0029] Figure 8 The present invention is a schematic cross-sectional structural diagram of a rotating rod, a first motor, and a clutch assembly of a variable-diameter adjustable pipe cleaning device for water conservancy projects.

[0030] Figure 9 This is a three-dimensional structural diagram of the rotating rod, the first motor, and the clutch assembly of the variable diameter adjustable pipe cleaning device for water conservancy projects of the present invention. Figure 1 .

[0031] Figure 10 This is a three-dimensional structural diagram of the rotating rod, the first motor, and the clutch assembly of the variable diameter adjustable pipe cleaning device for water conservancy projects of the present invention. Figure 2 .

[0032] Figure 11 The present invention is a schematic structural diagram of a diameter-adjustable pipe cleaning device for water conservancy projects equipped with a rotating cutter head.

[0033] The numbers in the figure are: rotating cylinder 1, accommodating through hole 10, slide rail 11, telescopic brush assembly 2, threaded rod 20, driven bevel gear 21, brush plate 22, connecting cylinder 23, diameter reducing adjustment assembly 3, adjusting ring 30, telescopic rod 31, fixed rod 310, sleeve 311, diameter reducing adjustment rod 32, auxiliary block 320, connecting rod 321, sliding block 33, rotating rod 4, rotating bevel gear 40, threaded section 41, transmission assembly 5, rotating spindle 50, first motor 51, clutch assembly 52, active disk 520, rotating disk body 5200, movable disk 5201, rotating tube 5202, accommodating groove 5203, driven disk 521, card slot 5210, centrifugal block 522, torsion spring 523, rotating cutter head 6. DETAILED DESCRIPTION

[0034] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1

[0036] like Figures 1-10 As shown, the present invention provides a variable diameter adjustable pipe cleaning device for water conservancy projects, including a rotating cylinder 1, a telescopic brush assembly 2, a variable diameter adjustment assembly 3, a rotating rod 4 and a transmission assembly 5, several groups of telescopic brush assemblies 2 are connected to the rotating cylinder 1 and can be extended and retracted radially along the rotating cylinder 1, several groups of variable diameter adjustment assemblies 3 are arranged on the rotating cylinder 1 and can be extended and retracted radially along the rotating cylinder 1, the variable diameter adjustment assembly 3 and the telescopic brush assembly 2 are arranged at intervals, the rotating rod 4 is axially arranged in the rotating cylinder 1, the telescopic brush assembly 2 and the variable diameter adjustment assembly 3 are linked to the rotating rod 4, the rotating cylinder 1 is linked to the transmission assembly 5, and the rotation of the rotating cylinder 1 can drive the telescopic brush assembly 2 to clean the inner wall of the pipe.

[0037] The rotation of the rotating rod 4 drives the telescopic brush assembly 2 and the variable diameter adjustment assembly 3 to extend and retract synchronously, so as to adapt to pipes of different diameters. When the telescopic brush assembly 2 and the variable diameter adjustment assembly 3 contact the pipe wall, the rotation of the rotating cylinder 1 can drive it to clean the inner wall of the pipe. The traditional cleaning device only relies on two sets of telescopic cleaning brushes to extend in a single radial direction to complete the cleaning of the pipe. When deep cleaning a local area of ​​a fixed cross-section, the circumferential effective diameter of the entire cleaning device cannot be changed. When the pipe diameter changes, the radial extension and retraction of the telescopic brush cannot make the cleaning device as a whole adapt to the change in pipe diameter. In this solution, the inner wall of the pipe is compositely cleaned by combining the telescopic brush assembly 2 and the variable diameter adjustment assembly 3, avoiding insufficient rigidity of the telescopic brush assembly 2 due to excessive extension, resulting in swinging deviation and inability to fully cover the inner wall of the pipe. The variable diameter adjustment assembly 3 can enhance the overall strength of the device.

[0038] A rotating bevel gear 40 is fixed to one end of the rotating rod 4. The telescopic brush assembly 2 includes a threaded rod 20, a driven bevel gear 21, a brush plate 22 and a connecting tube 23. A driven bevel gear 21 is fixed to one end of the threaded rod 20. The driven bevel gear 21 meshes with the rotating bevel gear 40. The other end of the threaded rod 20 passes through the wall of the rotating cylinder 1 along the radial direction of the rotating cylinder 1. The brush plate 22 is connected to the connecting tube 23. The inner wall of the connecting tube 23 meshes with the outer wall of the threaded rod 20. Figure 5 As shown, in the telescopic brush assembly 2, the threaded rod 20 is driven to rotate by the rotating gear on the rotating rod 4, and then the brush plate 22 and the connecting cylinder 23 are driven to move radially in the rotating cylinder 1, so as to adapt to the inner walls of pipes of different diameters, so that it is extended to contact the inner wall of the pipe. It should be noted that the side of the brush plate 22 in contact with the inner wall of the pipe is detachably provided with a cleaning structure. According to the cleaning requirements of different pipes, bristles of different hardness can be set on the brush plate 22, or a softer cleaning structure can be set, so as to increase the adaptability of the telescopic brush assembly 2 to cleaning the inner wall of the pipe.

[0039] The outer wall of the rotating rod 4 is provided with a threaded section 41, and the rotating cylinder 1 is provided with a receiving hole 10. The variable diameter adjustment assembly 3 includes an adjustment ring 30, a telescopic rod 31, a variable diameter adjustment rod 32 and a sliding block 33. The adjustment ring 30 is engaged with the threaded section 41. One end of the telescopic rod 31 is connected to the adjustment ring 30 and the other end is connected to the variable diameter adjustment rod 32. The telescopic rod 31 can move in the receiving hole 10. One end of the variable diameter adjustment rod 32 is hinged to the outer wall of the rotating cylinder 1, and the other end of the variable diameter adjustment rod 32 is hinged to the sliding block 33. The sliding block 33 is restricted on the rotating cylinder 1 and can move axially along the rotating cylinder 1. Figure 6 As shown, the rotation of the rotating rod 4 can drive the adjusting ring 30 to move along the axial direction on the rotating rod 4, drive the sliding block 33 to move on the outer wall of the rotating cylinder 1, and then make the variable diameter adjustment rod 32 expand or contract in the radial direction of the rotating cylinder 1. The variable diameter adjustment assembly 3 makes the rotating cylinder 1 coaxial with the pipeline, so that the telescopic brush assembly 2 can better clean the inner wall of the pipeline.

[0040] The telescopic rod 31 includes a fixed rod 310 and a sleeve 311. The fixed rod 310 is fixed on the adjustment ring 30. One end of the sleeve 311 is connected to the variable diameter adjustment rod 32. The sleeve 311 is sleeved on the outer wall of the fixed rod 310. The movement of the adjustment ring 30 can drive the sleeve 311 to move up and down on the fixed rod 310. Figure 6-Figure 7 As shown, the sleeve 311 is sleeved on the fixing rod 310 and can move up and down on the fixing rod 310 .

[0041] The outer wall of the rotating drum 1 is provided with a slide rail 11, and the sliding block 33 is limited to move during sliding. Figure 5 As shown, the slide rail 11 is used to limit the moving path of the sliding block 33. Figure 5 The slide rail 11 shown in the figure overlaps with the receiving through hole 10 , but no interference occurs when the telescopic rod 31 moves in the receiving through hole 10 and the sliding block 33 moves in the slide rail 11 .

[0042] The variable diameter adjustment rod 32 includes an auxiliary block 320 and two sets of connecting rods 321. One end of one set of connecting rods 321 is hinged to the outer wall of the rotating cylinder 1 and the other end is hinged to the auxiliary block 320. The other end of the connecting rod 321 is hinged to the auxiliary block 320 and the other end is hinged to the sliding block 33. The auxiliary block 320 can contact the inner wall of the pipe. Figure 4 、 Figure 7 As shown, the cross section of the auxiliary block 320 is arc-shaped, and a brush plate 22 is set between the two groups of auxiliary blocks 320. The auxiliary plate contacts the inner wall of the pipeline and can provide auxiliary support for the device, so that the rotating cylinder 1 is always set along the axis of the pipeline, making the pipeline cleaning more effective.

[0043] The transmission assembly 5 includes a rotating main shaft 50, a first motor 51 and a clutch assembly 52. ​​One end of the rotating main shaft 50 is connected to the rotating drum 1 and can drive the rotating drum 1 to rotate. The output shaft of the first motor 51 is connected to the rotating rod 4 through the clutch assembly 52. ​​The first motor 51 is driven, and the transmission shaft can drive the telescopic brush assembly 2 and the variable diameter adjustment assembly 3 to radially extend and retract on the rotating drum 1. Figures 8-10 As shown, the rotating main shaft 50 rotates to drive the rotating drum 1 to rotate. Preferably, the first motor 51 and the clutch assembly 52 are arranged at one end of the rotating drum 1, as shown in FIG. Figure 7 As shown, an accommodating chamber is provided at one end of the rotating cylinder 1, a first motor 51 is provided in the accommodating chamber, and a clutch assembly 52 is provided in the accommodating chamber. The first motor 51 can drive the rotating rod 4 to rotate. When the telescopic brush assembly 2 and the variable diameter adjustment assembly 3 contact the inner wall of the pipe, the pipe restricts their movement, and the first motor 51 is subjected to resistance, driving the clutch assembly 52 to act, so that there is a buffer in the connection between the output shaft of the first motor 51 and the rotating rod 4, avoiding large wear at the connection. It should be noted that driving the first motor 51 to reverse can drive the telescopic brush assembly 2 and the variable diameter adjustment assembly 3 to contract, so that they have greater adaptability when cleaning from a large-diameter pipe to a small-diameter pipe.

[0044] The clutch assembly 52 includes a driving disc 520, a driven disc 521, a centrifugal weight 522, and a torsion spring 523. The center of the driving disc 520 is connected to the output shaft of the first motor 51. The driving disc 520 is evenly distributed with receiving grooves 5203. One end of the torsion spring 523 is confined in the receiving groove 5203 and the other end is connected to the centrifugal weight 522. The driven disc 521 is connected to the rotating rod 4. The driven disc 521 is evenly provided with a plurality of slots 5210. The centrifugal weight 522 can enter the slots 5210. Figures 8-10As shown, when the active disk 520 rotates and drives the centrifugal weight 522 to rotate, the centrifugal force causes the centrifugal weight 522 to overcome the pulling force of the torsion spring 523 and expand outward, and the end of the centrifugal weight 522 is embedded in the slot 5210 of the driven disk 521, driving the rotating rod 4 to rotate, synchronously driving the variable diameter adjustment component 3 and the telescopic brush component 2 to move. When the variable diameter adjustment component 3 contacts the inner wall of the pipe, the rotation resistance of the rotating rod 4 increases sharply, and the reaction force of the slot 5210 of the driven disk 521 on the centrifugal weight 522 increases. When the reaction force exceeds the set torque of the torsion spring 523, the centrifugal weight 522 is pressed into the receiving groove 5203 of the active disk 520 and disengaged from the slot 5210 of the driven disk 521, and the rotating rod 4 stops rotating. It is preferred to set a pressure sensor at the bottom of the slot 5210. When the centrifugal weight 522 enters the receiving groove 5203, the pressure sensor triggers to output a power-off signal to the first motor 51 to prevent the first motor 51 from idling and wearing. In actual use, considering the vulnerability of centrifugal clutches with torsion springs to rust and seize in the humid environment of culverts, lubrication measures are indeed necessary. Lubricants with excellent rust-proof and waterproof properties can be used to regularly lubricate and maintain the centrifugal clutch, forming a protective film on its surface. This effectively prevents erosion from the humid environment, reduces the risk of rust and seizure, and ensures normal operation of the device. This lubrication operation can be performed in actual operation and is also a common practice in the field of mechanical engineering.

[0045] The active disk 520 includes a rotating disk body 5200, a movable disk 5201 and a rotating tube 5202. The rotating disk body 5200 is provided with a plurality of accommodating grooves 5203. The movable disk 5201 is provided with a plurality of protrusions, which extend through and into the accommodating grooves 5203 and are connected to the torsion spring 523. A threaded rotating tube 5202 is provided at the center of the movable disk 5201. The output shaft of the first motor 51 passes through the rotating tube 5202 and is connected to the rotating disk body 5200. The rotating tube 5202 can be rotatably sleeved on the output shaft of the first motor 51. Rotating the rotating tube 5202 can drive the movable disk 5201 to move axially along the output shaft of the first motor 51.

[0046] Since the torque setting of the torsion spring 523 needs to match the resistance when the variable diameter adjustment rod 32 contacts the pipe, the preload force of the torsion spring 523 in the accommodating groove 5203 can be adjusted by rotating the rotating tube 5202, and the degree of compression of the torsion spring 523 by the protrusion can be adjusted when rotating the rotating tube 5202.

[0047] The transmission assembly 5 also includes a second motor (not shown), the output shaft of which is connected to the rotating main shaft 50. This second motor drives the rotating drum 1 to rotate and clean the inner wall of the pipe. The second motor (i.e., a servo motor) can drive the rotating drum 1 in both forward and reverse directions. If the telescopic brush assembly 2 and the variable diameter adjustment assembly 3 become entangled with fibrous debris such as waterweed and become stuck, the second motor is controlled to reversely drive the rotating drum 1 in reverse, allowing the rotating drum 1 to free itself from the entanglement.

[0048] Example 2

[0049] like Figure 11 As shown, based on the first embodiment, the end of the rotating drum 1 away from the rotating main shaft 50 is detachably connected to a rotating cutter head 6, which rotates with the rotating drum 1. The rotating cutter head 6 can cut fiber garbage such as water plants in the pipeline to reduce the risk of entanglement.

[0050] The present invention utilizes a telescopic brush assembly and a variable diameter adjustment assembly working in tandem to perform comprehensive, in-depth, and complex cleaning of the pipe's inner wall. As the telescopic brush assembly extends, the variable diameter adjustment assembly performs real-time, precise adjustments based on the pipe's actual inner diameter. Through a series of complex mechanical transmission mechanisms, such as gears and a screw drive, the telescopic brush assembly's extension signal is converted into radial movement of the variable diameter adjustment assembly. As the telescopic brush assembly extends, the variable diameter adjustment assembly simultaneously expands outward, forming a mutually supporting structure with the telescopic brush assembly. This structural design not only ensures that the cleaning brush maintains appropriate contact pressure with the pipe's inner wall, but also the variable diameter adjustment assembly's high-strength material and rational structural layout provide additional support for the entire cleaning device. From a mechanical perspective, the variable diameter adjustment assembly shares some of the stress experienced by the telescopic brush assembly during rotation, significantly reducing the bending and torque experienced by the telescopic brush assembly. This significantly improves the device's stability and reliability in complex pipe environments and effectively addresses the lack of rigidity inherent in conventional cleaning devices caused by excessive brush extension.

[0051] Therefore, the present invention has been deeply optimized in terms of structural design. By setting up an ingenious mechanism in which the telescopic brush assembly and the variable diameter adjustment assembly are simultaneously linked to the rotating rod, a double leap in cleaning efficiency and effect is achieved. In traditional devices, the telescopic brush assembly and the variable diameter adjustment assembly often operate independently, and there is a lack of effective coordination between them. This makes it difficult for both to accurately contact the inner wall of the pipe at the same time during the cleaning process. For example, when the telescopic brush assembly first contacts the inner wall of the pipe, since the variable diameter adjustment assembly has not yet been adjusted into place, the telescopic brush assembly will be subjected to excessive local pressure and prone to wear and deformation; and when the variable diameter adjustment assembly is adjusted into place, the telescopic brush assembly may have lost the optimal cleaning angle due to excessive extension, resulting in poor cleaning effect.

[0052] The linkage mechanism of the present invention radically changes this situation. Before the device is activated, the telescopic brush assembly is retracted, and the variable diameter adjustment assembly is at its minimum radial dimension. When the device begins to enter the pipeline, the rotating rod begins to rotate, driven by the power source. Simultaneously, through a complex transmission system, such as a chain, belt, or synchronous belt drive, the rotating rod's rotational motion is transmitted simultaneously to the telescopic brush assembly and the variable diameter adjustment assembly. Upon receiving the rotation signal, the telescopic brush assembly begins to gradually extend according to a pre-set sequence, while the variable diameter adjustment assembly simultaneously begins to expand outward.

[0053] During this process, the speed and displacement of the telescopic brush assembly and the reducer assembly are precisely calculated and adjusted to ensure they simultaneously contact the pipe's inner wall. When both come into contact, the rotating cylinder naturally forms a rigid ring-shaped frame. The formation of this rigid ring-shaped frame is a dynamic process. At the moment of contact, the telescopic brush assembly and the reducer assembly squeeze each other, generating a reaction force that stabilizes the entire frame.

[0054] This ring-shaped rigid frame offers several significant advantages. From a mechanical perspective, it evenly distributes the device's weight across multiple points on the pipe's inner wall. In conventional systems, weight is concentrated at the contact points between the telescopic brush assembly and the pipe's inner wall, which can easily lead to excessive localized pressure and damage. The present invention's ring-shaped rigid frame, however, distributes weight across a larger area through multiple points of support, significantly reducing localized pressure and protecting the pipe's inner wall. Furthermore, during the cleaning process, cleaning resistance is effectively distributed across multiple contact points. When the cleaning brush rubs against dirt and impurities on the pipe's inner wall, the resistance is evenly transmitted throughout the device through the ring-shaped rigid frame, making its rotation smoother and reducing vibration caused by uneven resistance. This stable operation not only improves cleaning efficiency but also ensures uniform cleaning results. Most importantly, this design upgrades the traditional telescopic brush's single-point force distribution to a uniformly distributed force distribution throughout the device's ring-shaped structure, significantly increasing the device's load-bearing capacity and stability. This makes the cleaning process more efficient and smoother, significantly enhancing the quality of pipe cleaning.

[0055] The present invention also incorporates a highly innovative design to address potential issues that may arise during the operation of the first motor. By providing a clutch assembly between the first motor's output rod and the rotating rod, this effectively addresses the problem of idling wear of the first motor. In conventional pipe cleaning devices, when the cleaning brush contacts the inner wall of the pipe, the cleaning resistance suddenly increases due to the presence of various complex dirt, rust, and other contaminants on the inner wall. In this situation, the first motor often continues to forcefully operate in an attempt to overcome this resistance and drive the cleaning brush, resulting in idling.

[0056] Long-term idling causes damage to the first motor in many ways. From a mechanical structure perspective, idling will cause increased friction between the gears, bearings and other components inside the motor, generating a large amount of heat. If this heat cannot be dissipated in time, the temperature of the components will rise sharply, causing changes in material properties, such as reduced hardness and poor toughness, thereby accelerating the wear and damage of the components. From an electrical performance perspective, idling will increase the current of the motor and intensify voltage fluctuations, which can easily cause insulation damage inside the motor and increase the risk of motor short circuits and burnout. Moreover, traditional devices require frequent manual monitoring of the motor's operating status. Once idling is detected, the machine needs to be shut down in a timely manner. This not only increases the frequency of manual intervention, but also affects the continuity and efficiency of the cleaning operation.

[0057] The clutch assembly of this invention features a unique and sophisticated operating principle. It primarily consists of a driving disc, a transmission disc, and a driven disc, connected by specialized friction materials and mechanical structures. During normal operation, before the telescopic brush assembly and the variable diameter adjustment assembly contact the inner wall of the pipe, the driving disc and the transmission disc engage tightly through friction, smoothly transmitting power from the first motor to the rotating rod, driving the cleaning device to rotate.

[0058] When the telescopic brush assembly and the variable diameter adjustment assembly come into contact with the inner wall of the pipe, the resistance of the inner wall is transmitted to the clutch assembly via the rotating rod. At this point, the connection resistance between the active and driving discs in the clutch assembly suddenly increases. This is because as the resistance increases, the relative motion between the active and driving discs intensifies. Once the friction reaches its limit, power transmission becomes ineffective. This change triggers the clutch assembly's automatic disengagement mechanism, causing the connection between the active and driving discs to loosen and eventually break.

[0059] At the same time, the pressure sensor in the driven disc will immediately sense this change. The pressure sensor is a high-precision electronic component that can monitor the pressure on the driven disc in real time. When the connection between the active disc and the transmission disc is broken, the pressure on the driven disc will suddenly decrease. The pressure sensor will convert this pressure change signal into an electrical signal and quickly transmit it to the control system that controls the first motor. After receiving the signal, the control system will immediately issue a power-off command to stop the first motor. This series of actions is completed in an instant, effectively preventing the first motor from continuing to idle under excessive resistance, thereby greatly reducing the wear of the motor and extending its service life. At the same time, since there is no need for manual frequent monitoring of the motor's operating status and timely shutdown, the frequency of manual intervention is reduced, the degree of automation of the cleaning operation is improved, and the efficiency and effectiveness of pipeline cleaning are further improved.

[0060] The cleaning device's application scenarios can be expanded from closed pipes to open channels, culverts, reservoir slopes, and other scenarios, achieving all-terrain coverage and increasing practicality and applicability. A viable solution is to use a hydraulic telescopic support arm. This arm offers advantages such as flexible telescopic movement and strong load-bearing capacity. The length and angle of the support arm can be adjusted to suit the needs of different scenarios, allowing the cleaning device to better adapt to various complex terrains and ensure that cleaning operations can be carried out normally in different scenarios.

[0061] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the scope of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A diameter-adjustable pipe cleaning device for water conservancy projects, characterized in that: The invention comprises a rotating cylinder (1), a telescopic brush assembly (2), a diameter-changing adjustment assembly (3), a rotating rod (4) and a transmission assembly (5); a plurality of groups of the telescopic brush assemblies (2) are connected to the rotating cylinder (1) and can be radially extended and retracted along the rotating cylinder (1); a plurality of groups of the diameter-changing adjustment assemblies (3) are arranged on the rotating cylinder (1) and can be radially extended and retracted along the rotating cylinder (1); the diameter-changing adjustment assembly (3) and the telescopic brush assembly (2) are arranged at intervals; the rotating rod (4) is axially arranged in the rotating cylinder (1); the telescopic brush assembly (2) and the diameter-changing adjustment assembly (3) are linked to the rotating rod (4); the rotating cylinder (1) is linked to the transmission assembly (5); and the rotation of the rotating cylinder (1) can drive the telescopic brush assembly (2) to clean the inner wall of the pipeline.

2. The adjustable diameter pipe cleaning device for water conservancy projects according to claim 1, characterized in that: A rotating bevel gear (40) is fixed to one end of the rotating rod (4); the telescopic brush assembly (2) comprises a threaded rod (20), a driven bevel gear (21), a brush plate (22) and a connecting tube (23); a driven bevel gear (21) is fixed to one end of the threaded rod (20); the driven bevel gear (21) is meshed with the rotating bevel gear (40); the other end of the threaded rod (20) passes through the wall of the rotating tube (1) in the radial direction of the rotating tube (1); the brush plate (22) is connected to the connecting tube (23); and the inner wall of the connecting tube (23) is meshed with the outer wall of the threaded rod (20).

3. The variable diameter adjustable pipe cleaning device for water conservancy projects according to claim 2, characterized in that: The outer wall of the rotating rod (4) is provided with a threaded section (41), and the rotating cylinder (1) is provided with an accommodating through hole (10). The variable diameter adjustment assembly (3) comprises an adjusting ring (30), a telescopic rod (31), a variable diameter adjustment rod (32) and a sliding block (33). The adjusting ring (30) is engaged with the threaded section (41). One end of the telescopic rod (31) is connected to the adjusting ring (30) and the other end is connected to the variable diameter adjustment rod (32). The telescopic rod (31) is movable in the accommodating through hole (10). One end of the variable diameter adjustment rod (32) is hinged to the outer wall of the rotating cylinder (1), and the other end of the variable diameter adjustment rod (32) is hinged to a sliding block (33). The sliding block (33) is restricted on the rotating cylinder (1) and is movable along the axial direction of the rotating cylinder (1).

4. The variable diameter adjustable pipe cleaning device for water conservancy projects according to claim 3, characterized in that: The telescopic rod (31) comprises a fixed rod (310) and a sleeve (311); the fixed rod (310) is fixedly arranged on the adjustment ring (30); one end of the sleeve (311) is connected to the variable diameter adjustment rod (32); the sleeve (311) is sleeved on the outer wall of the fixed rod (310); and the movement of the adjustment ring (30) can drive the sleeve (311) to move up and down on the fixed rod (310).

5. The variable diameter adjustable pipe cleaning device for water conservancy projects according to claim 4, characterized in that: The outer wall of the rotating cylinder (1) is provided with a slide rail (11), and the sliding block (33) is restricted from moving during the sliding process.

6. The variable diameter adjustable pipe cleaning device for water conservancy projects according to claim 5, characterized in that: The variable diameter adjustment rod (32) comprises an auxiliary block (320) and two groups of connecting rods (321), wherein one end of the connecting rod (321) is hinged to the outer wall of the rotating cylinder (1) and the other end is hinged to the auxiliary block (320), and the other end of the connecting rod (321) is hinged to the auxiliary block (320) and the other end is hinged to the sliding block (33), and the auxiliary block (320) is capable of contacting the inner wall of the pipeline.

7. The variable diameter adjustable pipe cleaning device for water conservancy projects according to claim 1, characterized in that: The transmission assembly (5) comprises a rotating main shaft (50), a first motor (51) and a clutch assembly (52); one end of the rotating main shaft (50) is connected to the rotating drum (1) and can drive the rotating drum (1) to rotate; the output shaft of the first motor (51) is connected to the rotating rod (4) through the clutch assembly (52) to drive the first motor (51); and the transmission shaft can drive the telescopic brush assembly (2) and the variable diameter adjustment assembly (3) to radially extend and retract on the rotating drum (1).

8. The variable diameter adjustable pipe cleaning device for water conservancy projects according to claim 7, characterized in that: The clutch assembly (52) comprises a driving disk (520), a driven disk (521), a centrifugal block (522) and a torsion spring (523); the center of the driving disk (520) is connected to the output shaft of the first motor (51); accommodating grooves (5203) are evenly distributed on the driving disk (520); one end of the torsion spring (523) is restricted in the accommodating groove (5203) and the other end is connected to the centrifugal block (522); the driven disk (521) is connected to the rotating rod (4); a plurality of slots (5210) are evenly arranged on the driven disk (521); the centrifugal block (522) can enter the slots (5210).

9. The variable diameter adjustable pipe cleaning device for water conservancy projects according to claim 8, characterized in that: The active disk (520) includes a rotating disk body (5200), a movable disk (5201) and a rotating tube (5202); the rotating disk body (5200) is provided with a plurality of the accommodating grooves (5203); the movable disk (5201) is provided with a plurality of protrusions, the protrusions extending through the accommodating grooves (5203) and connected to the torsion spring (523); a rotating tube (5202) with threaded engagement is provided at the center of the movable disk (5201); the output shaft of the first motor (51) passes through the rotating tube (5202) and is connected to the rotating disk body (5200); the rotating tube (5202) can be rotatably sleeved on the output shaft of the first motor (51); and rotating the rotating tube (5202) can drive the movable disk (5201) to move axially along the output shaft of the first motor (51).

10. The variable diameter adjustable pipe cleaning device for water conservancy projects according to claim 7, characterized in that: The transmission assembly (5) further comprises a second motor, the output shaft of which is connected to the rotating main shaft (50).

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