Water conservancy project underground pipeline installation centering equipment

Abstract

The invention provides water conservancy project underground pipeline installation centering equipment, and relates to the technical field of water conservancy project construction, the water conservancy project underground pipeline installation centering equipment comprises a base, two clamping assemblies arranged at intervals and a horizontal moving assembly, each clamping assembly comprises two clamping plates arranged oppositely, and the horizontal moving assembly is arranged on the base; the horizontal moving assemblies and the clamping plates are arranged in a one-to-one correspondence mode, moving parts are arranged on the horizontal moving assemblies, the clamping plates are selectively movably or fixedly connected with the moving parts, and the moving parts are configured to drive the two clamping plates in the same clamping assembly to be close to or away from each other in the direction perpendicular to the pipeline centering direction. The clamping plates on the same side can synchronously move in the direction perpendicular to the pipeline centering direction. When the clamping plate is movably connected with the moving part, the clamping plate can move in the direction parallel to the centering direction of the pipeline. The pipeline moving device can conveniently and accurately move the pipelines with intervals so as to achieve fitting of the mounting ends of the pipelines.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering construction technology, and in particular to a centering device for the installation of underground pipelines in water conservancy projects. Background Technology

[0002] Underground pipelines in water conservancy projects are core engineering facilities laid underground, primarily responsible for water, drainage, oil, and gas transportation. They are widely used in key areas such as water resource allocation, flood control and drainage, agricultural irrigation, and industrial transportation. Their installation quality directly affects the overall operational stability and service life of the water conservancy project. During underground pipeline construction, the alignment accuracy at the pipe joints is crucial for ensuring the sealing performance of the interface and reducing the risk of future leakage. Therefore, specialized installation equipment is required to assist in completing the pipeline alignment operation, ensuring precise connection between the two pipe sections.

[0003] Patent document CN202220858665.6 discloses an underground pipeline installation alignment device for water conservancy engineering construction. This device can select a suitable pad according to the actual diameter of the pipeline to be connected. The pad is connected to the sliding groove of the connecting seat through the connecting strip and locked by the fixing bolt. Then, the bidirectional screw drive rod driven by the crank handle drives the connecting seat to move with the first roller at the bottom to the appropriate distance. The two pipeline sections are placed on the pad to complete the initial alignment. Then, the connecting block of the sliding fixing mechanism is moved, the pipeline is wrapped with a flexible belt, and the pipeline is locked by the threaded engagement of the fixing block and the fixing screw to prevent the pipeline from shifting during the connection process and ensure the concentricity of the alignment. At the same time, the base of the device is equipped with a second roller, which can be moved flexibly to adapt to the construction position adjustment.

[0004] However, the device still has some limitations in practical applications. For example, when installing large-sized and heavy underground pipelines, if there is a gap between two sections of pipeline to be connected and the pipeline needs to be moved to make the installation ends fit together, it is difficult to operate manually. Moving the pipeline by hoisting not only makes it difficult to make precise adjustments to the pipeline position, thus failing to ensure the connection accuracy, but also easily causes damage to the pipeline body during the movement, thereby affecting the construction quality and subsequent use of the pipeline. Summary of the Invention

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a centering device for underground pipeline installation in water conservancy projects, designed to address the problem that centering devices cannot easily and accurately move the pipeline to achieve proper alignment of the installation end when connecting large-sized, heavy underground pipelines.

[0006] According to an embodiment of the present invention, an underground pipeline installation alignment device for water conservancy projects includes a base, two clamping assemblies spaced apart, and a horizontal moving assembly. Each clamping assembly includes two clamping plates arranged opposite to each other. The horizontal moving assembly is disposed on the base, and the horizontal moving assembly and the clamping plates are arranged in a one-to-one correspondence. The horizontal moving assembly is provided with a moving part. The clamping plates are selectively movable or fixedly connected to the moving part. The moving part is configured to drive the two clamping plates in the same clamping assembly to move closer and further away from each other in a direction perpendicular to the pipeline alignment, and the clamping plates on the same side can move synchronously in a direction perpendicular to the pipeline alignment. When the clamping plate is movably connected to the moving part, the clamping plate can move in a direction parallel to the pipeline alignment.

[0007] The alignment equipment for underground pipeline installation in water conservancy projects according to embodiments of the present invention has at least the following beneficial effects: Synchronous movement of the clamping plates on the same side is achieved through the horizontal moving component, ensuring the consistency between the clamping center and the pipeline alignment axis, improving the stability and reliability of the equipment's alignment adjustment. It is not only suitable for various pipe diameters but also easy to operate, effectively improving the efficiency and quality of underground pipeline installation operations. Furthermore, the clamping plates can move axially along the pipeline in the movable connection state, allowing the pipeline to still achieve smooth and controllable axial micro-feeding while clamped. This enables the precise docking of large-size, heavy pipelines without the need for hoisting or manual forced movement, thus solving the problems of low docking accuracy, high operational difficulty, and easy damage to pipelines in existing technologies.

[0008] According to some embodiments of the present invention, the horizontal moving assembly includes a push rod and a driving assembly. The push rod is rotatably disposed on the base and is capable of horizontal movement in a direction perpendicular to the pipe alignment. The clamping plate is selectively movable or fixedly connected to the push rod. The driving assembly is simultaneously drivenly connected to both push rods so that the clamping plates on the same side can move synchronously in a direction perpendicular to the pipe alignment.

[0009] According to some embodiments of the present invention, the base is provided with a bearing fixing seat, the bearing fixing seat is equipped with a bearing, the bearing is embedded with a threaded cylinder, the push rod passes through the threaded cylinder, and the push rod and the threaded cylinder are threadedly connected, and the driving assembly is capable of driving the threaded cylinder to rotate, so that the push rod moves along the central axis of the threaded cylinder.

[0010] According to some embodiments of the present invention, the push rod is provided with a mounting plate at one end near the clamping plate, and the clamping plate can be selectively slidably or fixedly connected to the mounting plate.

[0011] According to some embodiments of the present invention, the mounting plate is provided with a guide rail, and the clamping plate is provided with a slider that cooperates with the guide rail; or the clamping plate is provided with a guide rail, and the mounting plate is provided with a slider that cooperates with the guide rail; and a locking structure is provided between the slider and the guide rail.

[0012] According to some embodiments of the present invention, the clamping plate is provided with casters, which are rotatably disposed on the base.

[0013] According to some embodiments of the present invention, the mounting plate is provided with multiple sets of guide posts, the extension direction of the guide posts is perpendicular to the direction of pipe alignment, and the guide posts are slidably connected to the base.

[0014] According to some embodiments of the present invention, the drive assembly includes a gear ring and a telescoping device. The gear ring is sleeved on the outer peripheral wall of the threaded cylinder. The telescoping device extends and retracts in the vertical direction. The telescoping shaft is connected to the gear ring through two transmission components symmetrically arranged in the extension and retraction direction, so that the threaded cylinder on the same side rotates in the same direction.

[0015] According to some embodiments of the present invention, the transmission assembly includes a swing arm and a straight rack. One end of the swing arm is pivotally connected to the telescopic shaft, the straight rack is slidably connected to the base, the straight rack is pivotally connected to the other end of the swing arm, and the teeth on the straight rack mesh with the outer peripheral teeth on the gear ring.

[0016] According to some embodiments of the present invention, the base includes a first base and a second base, the first base and the second base are detachably connected, the horizontal moving component corresponding to the clamping plate on the same side is disposed on the first base, and the horizontal moving component corresponding to the clamping plate on the other side is disposed on the second base.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and some of these additional aspects and advantages will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the alignment equipment for underground pipeline installation in a water conservancy project according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a single clamping component in one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a horizontal moving component in one embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the driving component in one embodiment of the present invention; Figure 5This is an assembly structure diagram of the push rod in one embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a straight rack in one embodiment of the present invention; Figure 7 This is an assembly structure diagram of the mounting plate and clamping plate in one embodiment of the present invention; Figure 8 This is a schematic diagram of the base structure in one embodiment of the present invention; Figure label: Base 100, first seat 101, second seat 102, bearing fixing seat 110, bearing 120, threaded cylinder 130, clamping assembly 200, clamping plate 210, slider 211, caster wheel 212, horizontal movement assembly 300, push rod 310, mounting plate 311, linear guide rail 3111, guide column 3112, drive assembly 320, gear ring 321, telescopic device 322, transmission assembly 400, swing arm 410, straight rack 420, support slider 421; The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0021] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0022] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0023] Reference Figures 1 to 8The present invention provides an underground pipeline installation alignment device for water conservancy projects, comprising a base 100, two clamping components 200 spaced apart, and a horizontal moving component 300.

[0024] Specifically, each clamping assembly 200 includes two clamping plates 210 arranged opposite to each other. A horizontal moving assembly 300 is disposed on the base 100, and the horizontal moving assembly 300 is arranged in a one-to-one correspondence with the clamping plates 210. The horizontal moving assembly 300 is provided with a moving part. When it is necessary to drive the two clamping plates 210 in the same clamping assembly 200 to move closer to each other and further away from each other in a direction perpendicular to the pipe alignment, the clamping plates 210 are fixedly connected to the moving parts. Thus, when the moving parts move in a direction perpendicular to the pipe alignment, the clamping plates 210 rigidly connected to the moving parts also move in a direction perpendicular to the pipe alignment.

[0025] Furthermore, to ensure the consistency between the holding center and the pipeline alignment axis, the clamping plates 210 on the same side along the pipeline alignment direction (i.e., the pipeline axis) can move synchronously in a direction perpendicular to the pipeline alignment. This allows for simultaneous adjustment of the positions of the clamping plates 210 on the same side first, followed by simultaneous adjustment of the positions of the clamping plates 210 on the other side. Moreover, the clamping plates 210 can move along the pipeline axis in the movable connection state, enabling smooth and controllable axial micro-feeding of the pipeline even while clamped. This allows for precise docking of large-size, heavy pipelines without the need for hoisting or manual forced movement, thus solving the problems of low docking accuracy, high operational difficulty, and easy pipeline damage in existing technologies.

[0026] In actual pipe alignment operations: First, the two pipe sections to be joined are placed between the two clamping assemblies 200 on the base 100. Then, by operating the horizontal moving assembly 300, the moving part of the horizontal moving assembly 300 drives the two clamping plates 210 in each clamping assembly 200 to move closer to each other along the radial direction of the pipe (i.e., perpendicular to the alignment axis), thereby stably clamping and initially centering the pipe from both sides, ensuring that the axes of the two pipe sections are basically aligned. In particular, when final fine fitting is required, the fixed connection between the clamping plate 210 and the moving part can be released, converting it to a movable connection state. At this time, the clamping plate 210, which is already in the clamping state, can slide along the axial direction of the pipe (i.e., parallel to the alignment axis) on the guide rail on the mounting plate 311. When a small axial thrust is applied, or with the help of auxiliary fine-tuning tools, the heavy pipe that is firmly clamped can be smoothly and controllably fed axially until the mounting end faces of the two pipes are precisely fitted. After docking is completed, the clamping plate 210 can be re-locked and the docking state can be maintained for subsequent operations.

[0027] Reference Figure 3 , Figure 5In some embodiments, the horizontal movement component 300 includes a push rod 310 and a drive component 320.

[0028] Specifically, the push rod 310 is rotatably mounted on the base 100, with its axis perpendicular to the alignment direction of the pipe. Each clamping plate 210 can be selectively connected to the corresponding push rod 310 in a movable or fixed manner. The drive assembly 320, as a power source, can simultaneously drive two push rods 310 located on the same side of the alignment direction of the pipe to move horizontally in sync. Specifically, when the drive assembly 320 is working, it drives the two push rods 310 to move in a completely synchronized linear motion, thereby causing the two clamping plates 210 fixedly connected to it to move synchronously closer to or further away from the pipe to be clamped along the alignment direction perpendicular to the pipe.

[0029] In this example, the synchronous control of the two push rods 310 on the same side by the drive component 320 ensures the synchronicity of the clamping action. This ensures that the two clamping plates 210 on the same side maintain the same displacement at all times, avoiding pipe misalignment or alignment errors caused by asynchronous adjustment on one side, and improving the initial accuracy and reliability of the alignment adjustment. Moreover, the synchronous motion mechanism reduces uneven stress on the pipe surface, which is beneficial for pipe protection.

[0030] Reference Figure 5 In some embodiments, to enable the push rod 310 to be rotatably mounted on the base 100, a bearing 120 fixing seat 110 is fixedly mounted on the base 100. The bearing 120 fixing seat 110 houses a bearing 120, such as a deep groove ball bearing 120 or a tapered roller bearing 120. A threaded cylinder 130 is coaxially embedded and fixed within the inner ring of the bearing 120, allowing the threaded cylinder 130 to rotate freely under the support of the bearing 120 while being axially constrained. The push rod 310 passes through the threaded cylinder 130, and its shaft is machined with external threads, which form a matching threaded pair with the internal threads of the threaded cylinder 130.

[0031] During operation, when the drive assembly 320 outputs power, it drives the threaded cylinder 130 to rotate precisely within the bearing 120. The rotational motion of the threaded cylinder 130 is directly converted into the linear movement of the push rod 310 along the central axis of the threaded cylinder 130 (i.e., perpendicular to the pipe alignment direction). By controlling the direction of the drive assembly 320 and the rotation angle of the threaded cylinder 130, the extension or retraction distance of the push rod 310 can be precisely controlled, thereby controlling the opening and closing position of the clamping plate 210.

[0032] In this embodiment, the threaded drive itself has speed reduction and torque increase characteristics and micro-motion characteristics, allowing the operator to achieve millimeter-level or even sub-millimeter-level stroke adjustment of the clamping plate 210 by precisely controlling the rotation angle of the threaded cylinder 130. This provides a crucial foundation for the precise alignment of heavy-duty pipes. Moreover, the reasonable thread helix angle design allows the mechanism to automatically maintain the position of the push rod 310 by relying on the frictional self-locking characteristics of the threaded pair after the drive component 320 stops. This reliably resists the lateral force and vibration generated by the weight of the pipe, ensuring a stable clamping state without the need for additional braking devices, making it safe and reliable. Furthermore, the use of the bearing 120 not only greatly reduces the frictional resistance of the threaded cylinder 130 rotation, making operation more effortless, but also, together with the robust bearing 120 fixing seat 110, forms a high-rigidity support. This can, to a certain extent, suppress the radial runout and end deflection of the push rod 310 during movement, ensuring the straightness and parallelism of the movement trajectory of the push rod 310 and the clamping plate 210, thereby directly improving the coaxiality accuracy of pipe alignment. In addition, this mechanical transmission method is less sensitive to the environment (such as humidity and dust), is easy to maintain, and has a long service life, making it very suitable for long-term stable operation at complex water conservancy construction sites.

[0033] Reference Figure 3 , Figure 7 In some embodiments, in order to achieve flexible switching of the function of the clamping plate 210 and reliable load bearing, a mounting plate 311 is fixedly connected to the end of the push rod 310 near the clamping plate 210, and the clamping plate 210 can be selectively slidably or fixedly connected to the mounting plate 311.

[0034] When radial clamping or loosening alignment of the pipeline is required, the clamping plate 210 is fixedly connected to the mounting plate 311. At this time, the clamping plate 210 and the push rod 310 form a rigid whole, and the linear movement of the push rod 310 is directly transmitted to the clamping plate 210 without any lag, achieving stable radial clamping or release. When the pipeline needs to be finely aligned axially after initial alignment, the clamping plate 210 and the mounting plate 311 are switched to a sliding connection state. In this state, the clamping plate 210 can slide freely or in a controlled manner along the guide components (such as guide rails or grooves) preset on the mounting plate 311 in the direction parallel to the pipeline alignment (i.e., axial direction), while the push rod 310 and the mounting plate 311 remain in fixed positions, thereby allowing the clamped pipeline to make slight adjustments to its axial position under stable radial constraints.

[0035] In this embodiment, a simple connection state switch can seamlessly switch from clamping mode to precise sliding mode without moving the bulky pipe itself, simplifying the operation process for connecting heavy pipes.

[0036] Reference Figure 7In some embodiments, to enable quick switching between the clamping plate 210 and the mounting plate 311, a high-precision linear guide rail 3111 is machined or fixedly mounted on the mounting plate 311 along an axial direction parallel to the pipe alignment. Correspondingly, a slider 211 precisely matched to the guide rail is provided on the side of the clamping plate 210 facing away from the pipe to be clamped. To ensure smooth relative movement between the slider 211 and the linear guide rail 3111, ball or roller bearings 120 can be provided inside the guide rail, allowing the slider 211 to slide smoothly on the guide rail with minimal friction.

[0037] Furthermore, a dedicated locking structure (not shown in the accompanying drawings) is provided at the mating point between the slider 211 and the linear guide 3111. This locking structure can be designed in various forms, such as a screw-in set screw or pressure block on the side or top of the slider 211. When the locking structure is released, the clamping plate 210 can slide freely along the linear guide 3111; when fixing is required, the locking structure is operated to firmly lock the slider 211 in the current position of the linear guide 3111.

[0038] It is understandable that a linear guide rail 3111 can also be provided on the clamping plate 210, and correspondingly, a slider 211 that cooperates with the guide rail can be provided on the mounting plate 311.

[0039] In this embodiment, the mounting plate 311 serves as a rigid transition platform. The guide rail slider mechanism formed between the mounting plate 311 and the clamping plate 210 ensures the straightness and smoothness of the axial sliding of the clamping plate 210, enabling pipes weighing hundreds of kilograms or even several tons to achieve controllable and precise movement under the action of manpower or small tools.

[0040] Reference Figure 7 In some embodiments, to further optimize the smoothness of movement and ease of operation during heavy-duty pipe adjustment, one or more casters 212 are installed at the bottom of the clamping plate 210. These casters 212 have their rolling surfaces facing downwards and maintain contact with the upper surface of the base 100 of the equipment, allowing them to roll freely. When the clamping plate 210 needs to be adjusted relative to the mounting plate 311, the casters 212 can roll on the flat surface of the base 100, transforming any potential sliding friction into rolling friction, thereby reducing friction during overall movement.

[0041] In this embodiment, by providing casters 212 on the clamping plate 210 that roll in contact with the base 100, the moving resistance can be reduced, making operation more labor-saving and efficient. Specifically, by converting sliding friction into rolling friction, the operator only needs to apply a small axial thrust or pull force to drive the clamping plate 210, which carries heavy pipes, to move smoothly, reducing labor intensity. This advantage is particularly pronounced in situations requiring repeated fine-tuning of alignment. Simultaneously, the smooth rolling of the casters 212 avoids the "jamming" or "jumping" phenomena that may occur with sliding, making the axial feeding process of the pipe more stable and continuous. This facilitates higher precision end-face docking and reduces misalignment caused by unstable movement. Furthermore, the weight of the clamping plate 210 and part of the pipe load are directly transferred to the base 100 through the casters 212, reducing the vertical load and vibration impact on the precision guide rail slider pair on the mounting plate 311. This effectively extends the service life of these moving parts and improves the long-term precision and stability of the equipment. Furthermore, even when there are slight unevenness or foreign objects on the surface of the base 100, the elasticity and rolling characteristics of the rolling surface of the caster wheel 212 can adapt to a certain extent, ensuring that the movement function of the clamping plate 210 is not greatly affected, and improving the reliability of the equipment in complex construction sites.

[0042] Reference Figure 3 and Figure 7 In some embodiments, multiple sets of guide posts 3112 are fixedly arranged on the mounting plate 311 in a direction perpendicular to the pipe alignment. These guide posts 3112 can be rigid cylindrical rods, with their extension direction strictly parallel to the movement axis of the push rod 310. Optionally, precise guide holes or linear bearings can be provided at corresponding positions on the base 100. One end of the guide post 3112 is fixedly connected to the mounting plate 311, and the other end passes through these guide holes or linear bearings, thereby forming a precise sliding connection with the base 100. With this configuration, when the drive assembly 320 drives the threaded cylinder 130 to rotate, the push rod 310 is limited by the guide posts 3112 and cannot rotate, so that when the threaded cylinder 130 rotates, the push rod 310 can only move linearly in a direction perpendicular to the alignment. At this time, the mounting plate 311 also moves linearly, and the guide posts 3112 slide synchronously in the guide holes or linear bearings on the base 100.

[0043] In this embodiment, by setting multiple sets of guide columns 3112 perpendicular to the pipe alignment direction and slidably connected to the base 100, the structural rigidity and motion stability of the system can be enhanced. Specifically, when clamping heavy pipes, the push rod 310 and mounting plate 311 are subjected to huge radial loads and possible overturning moments. The guide columns 3112, as additional rigid supports parallel to the push rod 310, together with the push rod 310 itself, form a multi-point, high-rigidity support structure, which can effectively resist such eccentric loads and bending moments. To a certain extent, it can prevent the mounting plate 311 and clamping plate 210 from deflecting, twisting, or vibrating under force, ensuring the stability and alignment accuracy of the clamping centerline. At the same time, the guide columns 3112 can share the radial force and bending moment that were originally borne entirely by the threaded pair of the push rod 310, thereby reducing the wear of the threaded pair and improving the durability and long-term accuracy retention of the screw drive mechanism.

[0044] Reference Figure 3 In some embodiments, the drive assembly 320 includes a gear ring 321 and a telescoping element 322.

[0045] Specifically, a gear ring 321 is fixedly fitted onto the outer peripheral wall of each threaded cylinder 130. An expansion joint 322 is vertically mounted on the base 100, and the expansion and contraction of the expansion joint 322's shaft is in the vertical direction. Simultaneously, the expansion joint 322 is connected to the left and right gear rings 321 respectively via two transmission components 400 symmetrically arranged along its expansion and contraction direction. The transmission components 400 convert the vertical linear motion of the expansion joint 321 into the rotational motion of the gear rings 321. Because the two transmission components 400 are symmetrically arranged, when the expansion joint extends upwards, the two transmission components 400 can simultaneously drive the two gear rings 321 to rotate in the same direction (e.g., both clockwise); when the expansion joint retracts downwards, the two transmission components 400 can simultaneously drive the two gear rings 321 to rotate in another direction (e.g., both counterclockwise). Since the gear rings 321 are fixed to the threaded cylinder 130, the synchronous rotation of the gear rings 321 in the same direction is directly converted into the synchronous rotation of the two threaded cylinders 130 in the same direction.

[0046] Optionally, the telescopic device 322 may be equipped with a linear actuator such as a hydraulic cylinder, an electric push rod, or a pneumatic cylinder.

[0047] In this embodiment, a drive scheme driven by a single telescopic actuator 322 and linked by a symmetrical transmission assembly 400 to both sides of the gear ring 321 is adopted. This ensures a high degree of synchronization and centering accuracy of the drive. Since the two threaded cylinders 130 are driven by the same telescopic shaft through a completely symmetrical mechanism, their rotation start, stop, angle, and direction always remain strictly consistent. This eliminates the asynchronous movement of the clamping plate 210 caused by possible response differences, control errors, or mechanical backlashes between two independent drive sources, providing crucial power assurance for the precise alignment of the pipe clamping centerline with the equipment's centering axis. Furthermore, this structure requires only one telescopic actuator 322 as a power source, coupled with a simple symmetrical linkage mechanism, replacing a scheme that might require two sets of motors, reducers, or complex synchronous control systems. This not only makes operation and control simpler and more intuitive (only the telescopic actuator 322 needs to be controlled to extend and retract), but also reduces the number of components, lowers the probability of failure and maintenance costs, and makes the structure more compact and robust.

[0048] Reference Figure 3 and Figure 4 In some embodiments, in order to efficiently, accurately and synchronously convert the vertical linear motion of the telescopic device 322 into the rotational motion of the two threaded cylinders 130, the transmission assembly 400 includes a swing arm 410 and a straight rack 420.

[0049] Specifically, the swing arm 410 is a rigid rod. One end of the swing arm 410 can be rotatably connected to the telescopic shaft of the telescopic device 322 via a pivot. The straight rack 420 is arranged horizontally, and its bottom can be slidably connected to the base 100 via a support slider 421, allowing it to slide freely in a direction parallel to the pipe alignment. The other end of the swing arm 410 is also connected to one end of the straight rack 420 via a pivot. The straight rack 420 has continuous teeth machined on it, which precisely mesh with the outer peripheral teeth of the gear ring 321 fixedly sleeved on the outer peripheral wall of the threaded cylinder 130.

[0050] When the telescopic shaft of the telescopic device 322 extends or retracts vertically, it drives the swing arm 410 to swing with its connection point with the telescopic shaft as the fulcrum. The other end of the swing arm 410 then pushes or pulls the straight rack 420 to move horizontally along its sliding direction. The horizontal movement of the straight rack 420 is directly converted into the rotational motion of the gear ring 321 (together with the threaded cylinder 130) through the gear and rack meshing pair. Since the transmission components 400 on the left and right sides are symmetrically arranged with respect to the telescopic shaft, the single vertical movement of the telescopic shaft of the telescopic device 322 can synchronously and in the same direction drive the two gear rings 321 to rotate.

[0051] In this embodiment, the motion pair of the combined transmission structure of the swing arm 410 and the straight rack 420 is easy to lubricate and maintain, making it very suitable for long-term use in complex water conservancy construction sites. Moreover, the structure is intuitive, has few points of failure, and is relatively simple to maintain even if maintenance is required.

[0052] Reference Figure 8 In some embodiments, the base 100 structure is modularly designed. Specifically, the base 100 is not a single integral structure, but is composed of two independent modular units, a first base 101 and a second base 102. The first base 101 and the second base 102 are securely connected by a detachable connection method, such as using high-strength bolts, pins, or quick-locking mechanisms.

[0053] In terms of layout, the clamping plate 210 and its matching horizontal moving component 300 located on the same side of the equipment are integrated and installed on the first base 101, while the clamping plate 210 and its matching horizontal moving component 300 located on the other side are integrated and installed on the second base 102. At the construction site, the two bases can be transported to the work point separately, and then quickly assembled into a complete centering device through connectors; after the work is completed, they can also be quickly disassembled for easy transportation.

[0054] In this embodiment, the use of a split, detachable base 100 design facilitates manual handling and on-site positioning, making it particularly suitable for water conservancy engineering operations in the field or in confined spaces. Moreover, in complex pipe trenches or limited working areas, the two units can be placed in the optimal positions on both sides of the pipe before being connected, avoiding the problem of the overall equipment being difficult to position due to space constraints. The assembly process is simple and quick, shortening on-site preparation time.

[0055] It also facilitates quick disassembly, and the disassembly direction is perpendicular to the pipe axis. In typical pipe trench or tunnel working environments, the space along the pipe axis (i.e., the length direction) is often occupied by the pipe itself, operators, and subsequent welding equipment, making it quite crowded and difficult to move large components longitudinally. While the space on both sides perpendicular to the pipe axis is narrow, it is usually unobstructed. Designing the disassembly direction perpendicular to the pipe axis allows operators to directly loosen the connectors on the side of the pipe and move each individual seat unit laterally, eliminating the need for complex maneuvering or hoisting in the crowded longitudinal space. This simplifies the disassembly and assembly operations and improves work efficiency and safety in confined spaces. Moreover, the perpendicular axial disassembly method allows two seat units to be moved parallel to each other directly from both sides of the aligned pipe. The equipment removal path is parallel to the pipe axis, eliminating any axial collision or dragging risk to the already aligned pipe. This ensures that the achieved alignment accuracy is perfectly maintained during equipment removal and avoids secondary disturbance.

[0056] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A centering device for installing underground pipelines in water conservancy projects, characterized in that, include: Base; Two clamping components are spaced apart, each of the clamping components including two clamping plates arranged opposite each other; A horizontal moving assembly is provided on the base and is arranged in a one-to-one correspondence with the clamping plates. The horizontal moving assembly is provided with a moving part. The clamping plates can be selectively moved or fixedly connected to the moving part. The moving part is configured to drive two clamping plates in the same clamping assembly to move closer and further away from each other in a direction perpendicular to the pipe centering, and the clamping plates on the same side can move synchronously in a direction perpendicular to the pipe centering. When the clamping plate is movably connected to the moving part, the clamping plate can move in a direction parallel to the centering of the pipe.

2. The alignment equipment for underground pipeline installation in water conservancy projects according to claim 1, characterized in that, The horizontal movement component includes: A push rod is rotatably mounted on the base and can move horizontally in a direction perpendicular to the pipe alignment. The clamping plate can be selectively movable or fixedly connected to the push rod. The drive assembly is simultaneously connected to both of the push rods to enable the clamping plates on the same side to move synchronously in a direction perpendicular to the pipe alignment.

3. The alignment equipment for underground pipeline installation in water conservancy projects according to claim 2, characterized in that, The base is provided with a bearing fixing seat, the bearing fixing seat is equipped with a bearing, the bearing is embedded with a threaded cylinder, the push rod passes through the threaded cylinder and is threadedly connected to the threaded cylinder, and the drive assembly can drive the threaded cylinder to rotate so that the push rod moves along the central axis of the threaded cylinder.

4. The alignment equipment for underground pipeline installation in water conservancy projects according to claim 2, characterized in that, The push rod has a mounting plate at one end near the clamping plate, and the clamping plate can be selectively slidably or fixedly connected to the mounting plate.

5. The alignment equipment for underground pipeline installation in water conservancy projects according to claim 4, characterized in that, The mounting plate is provided with a guide rail, and the clamping plate is provided with a slider that cooperates with the guide rail; or the clamping plate is provided with a guide rail, and the mounting plate is provided with a slider that cooperates with the guide rail. Furthermore, a locking structure is provided between the slider and the guide rail.

6. The alignment equipment for underground pipeline installation in water conservancy projects according to claim 5, characterized in that, The clamping plate is equipped with casters, which are rotatably mounted on the base.

7. The alignment equipment for underground pipeline installation in water conservancy projects according to claim 4, characterized in that, The mounting plate is provided with multiple sets of guide posts, the extension direction of the guide posts is perpendicular to the direction of pipe alignment, and the guide posts are slidably connected to the base.

8. The alignment equipment for underground pipeline installation in water conservancy projects according to claim 3, characterized in that, The driving component includes: A gear ring is fitted onto the outer peripheral wall of the threaded cylinder; The telescopic device has a telescopic shaft that extends and retracts in the vertical direction. The telescopic shaft is connected to the gear ring via two transmission components symmetrically arranged along the telescopic direction, so that the threaded cylinder on the same side rotates in the same direction.

9. The alignment equipment for underground pipeline installation in water conservancy projects according to claim 6, characterized in that, The transmission assembly includes: A swing arm, one end of which is pivotally connected to the telescopic shaft; A straight rack is slidably connected to the base, and the other end of the straight rack is pivotally connected to the swing arm, with the teeth on the straight rack meshing with the outer peripheral teeth on the gear ring.

10. The alignment equipment for underground pipeline installation in water conservancy projects according to any one of claims 1 to 9, characterized in that, The base includes a first base and a second base, which are detachably connected. The horizontal moving component corresponding to the clamping plate on the same side is disposed on the first base, and the horizontal moving component corresponding to the clamping plate on the other side is disposed on the second base.

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