Double-flap automatic closed replacement pile machine

Abstract

The utility model discloses a kind of double-valve automatic closing replacement pile machine, comprising: pile frame;Walking mechanism is set to the bottom of the pile frame;Vibrator is set on the pile frame;Pile pipe upper end is connected with the output end of the vibrator;Feeding system is set on the pile frame, for pouring bulk material in the pile pipe;Double-valve automatic closing pile tip is fixedly connected to the lower end of the pile pipe;The double-valve automatic closing pile tip includes pile tip main body, two petals flap articulated on the pile tip main body by pivot, and bridge top type bottom plate fixedly arranged in the flap inner side;When the flap closes, two the bridge top type bottom plate jointly closes the bottom mouth of the pile pipe. By double-valve automatic closing pile tip design, automatically close to prevent soil when sinking pipe, automatically open to discharge when pulling pipe, fundamentally solve the soft soil backflow problem;Adopt walking mechanism, guarantee the stability and accurate positioning ability of construction on soft soil foundation.

Description

Technical Field

[0001] This utility model belongs to the technical field of construction equipment for foundation treatment in geotechnical engineering, and particularly relates to a double-lobed automatic closed replacement pile machine. Background Technology

[0002] In soft soil foundation treatment, the replacement method is often used to construct loose material piles (such as gravel piles and sand piles) to form vertical drainage channels and improve the bearing capacity of the foundation through compaction. The traditional construction method involves driving the pile casing into the soil, filling it with loose material, and then vibrating and pulling the casing to form the pile body. However, this method has significant drawbacks: when pulling the casing in saturated soft soil, the soil at the bottom of the casing easily flows into the casing under negative pressure, leading to pile necking, pile breakage, or discontinuity; soft soil backflow can also block drainage channels, seriously affecting the quality of pile formation and drainage effect.

[0003] While some existing technologies employ simple pile tips, most of these tips have limited functionality, serving only as guides and sealing the bottom, and cannot effectively prevent soft soil backflow during pipe extraction. Therefore, there is an urgent need for a specialized pile driver that can automatically open and close, effectively prevent soil backflow, and ensure pile quality. Utility Model Content

[0004] The purpose of this invention is to provide a double-lobed automatic closed replacement pile machine that can effectively solve the problem of soft soil backflow and form a continuous, dense, and high-quality vertical drainage channel.

[0005] To solve the above-mentioned technical problems, the specific technical solution of this utility model is as follows:

[0006] In some embodiments of this application, a dual-lobe automatic closure replacement pile machine is provided, comprising:

[0007] Pile frame;

[0008] A traveling mechanism is located at the bottom of the pile frame;

[0009] A vibrator is mounted on the pile frame;

[0010] The pile pipe, the upper end of which is connected to the output end of the vibrator;

[0011] A feeding system, located at the upper end of the pile pipe, is used to inject bulk materials into the pile pipe;

[0012] A double-lobed automatic closing pile tip is fixedly connected to the lower end of the pile pipe; the double-lobed automatic closing pile tip includes a pile tip body, which is formed by two lobes hinged together by a pivot, forming an openable and closable structure;

[0013] A bridge-top base plate, which is fixedly connected to the bottom of the petal body;

[0014] Electric or chain-driven pressurization systems are used to apply additional pressure to the pile pipe when the pile length increases or when the pile pipe encounters soil with high strength and cannot reach the design depth smoothly under vibration, thereby improving the pipe sinking capacity.

[0015] The inverted soil-blocking device is formed by adding a ring of protrusions around the periphery of the flap-type pile tip. When the pile tube sinks to the design elevation, the soil outside the end will generate shrinkage compressive stress due to vibration and tighten the pile tube, thus forming a reverse resistance to the outer protrusion. When the pile tube is filled with bulk material and the vibration is turned on to pull the pile tube up, the flap-type pile tip will achieve an inverted effect under the action of the reverse resistance, forcibly causing the flap to open and accelerating the unloading of the material inside the tube, forming a bulk material pile body, which is a vertical drainage channel.

[0016] When the two petals are closed at the top, they form a pipe end connection for connecting with the external pile pipe;

[0017] The two petals, when enclosed at the top, form a pipe end connection for connecting with an external pile pipe.

[0018] The cross-section of the bridge-top bottom plate is one of a triangle, trapezoid, or arc, with its top tip or apex facing the interior of the pile tip body.

[0019] At least one rib is provided on the inner wall of the valve.

[0020] The rib extends along the axial direction of the petal body.

[0021] The inner wall of the pipe end connection is provided with an internal thread for engaging with the external thread at the bottom of the external pile pipe; or, the outer wall of the pipe end connection is provided with an external thread for engaging with the internal thread at the bottom of the external pile pipe.

[0022] The pipe end connection is fixedly connected to the external pile pipe by welding or flange connection.

[0023] The rotating shaft is a pin, and the petal body is provided with a shaft hole that mates with the pin.

[0024] In some embodiments of this application, the walking mechanism is a walking mechanism, including a long boat and a middle boat, wherein the long boat and the middle boat are connected by at least one first hydraulic cylinder; and / or, the pile frame is connected to the long boat or the middle boat by at least one second hydraulic cylinder to realize the lifting and leveling of the pile frame.

[0025] In some embodiments of this application, the vibrator is a hydraulic or electric vibrator, which is connected to a hydraulic station mounted on the pile frame via hydraulic lines; the hydraulic station also provides power to the traveling mechanism; the electric vibrator can be directly mounted on the top of the pile pipe and connected to the pile frame track.

[0026] In some embodiments of this application, the pile pipe and the double-lobed automatic closing pile tip are detachably connected by a flange and bolts; or, the lower end of the pile pipe is directly welded to the pile tip body of the double-lobed automatic closing pile tip.

[0027] In some embodiments of this application, the feeding system includes:

[0028] hoist;

[0029] The wire rope driven by the winch;

[0030] and the feeding hopper connected to the wire rope;

[0031] The pile frame is equipped with a guide pulley, and the wire rope passes around the guide pulley and connects to the feeding hopper, so that the feeding hopper can be lifted to the feeding position at the top of the pile pipe or lowered to the loading position on the ground under the control of the winch.

[0032] In some embodiments of this application, the bottom of the feeding hopper is an openable structure, specifically a jaw gate or a tilting bottom plate, which is controlled to open and close by a set of lever mechanisms or a separate opening and closing cylinder.

[0033] In some embodiments of this application, a reinforcing rib is provided on the outer side of the valve of the double-lobed automatic closing pile tip, and a wear-resistant alloy block is embedded on the surface of the reinforcing rib.

[0034] In some embodiments of this application, a reinforcing rib is provided between the bridge-top bottom plate and the inner wall of the valve; and / or, the rotating shaft is a hollow mandrel.

[0035] In some embodiments of this application, a control room is provided on the pile frame, and the control room integrates a console. The console includes a joystick, buttons, and a display screen for controlling the walking mechanism, positioning mechanism, vibrator, pile pipe sinking and electric chain pressurization system, and feeding system.

[0036] Some embodiments of this application also include a data acquisition and monitoring system, which includes:

[0037] An inclination sensor installed on the pile frame is used to monitor the verticality of the pile pipe;

[0038] Depth sensors installed on vibrators or pile pipes are used to monitor the sinking depth;

[0039] A pressure sensor installed in the hydraulic system is used to monitor the working pressure of the vibrator;

[0040] The data acquisition and monitoring system is connected to the display screen in the control room to display construction parameters in real time.

[0041] Compared with existing technologies, the advantages of this utility model are as follows: the double-lobed automatic closing pile tip design automatically closes to prevent soil ingress during pipe sinking and automatically opens to discharge material during pipe extraction, fundamentally solving the problem of soft soil backflow; the adoption of a walking mechanism ensures the stability and precise positioning capability of construction on soft soil foundations; the intelligent data acquisition and monitoring system enables refined management of the construction process; the high-pressure air auxiliary system effectively prevents bridging of loose materials inside the pile pipe; the overall equipment has good coordination, high pile quality, and significantly improved construction efficiency. Attached Figure Description

[0042] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0043] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0044] Figure 2 A schematic diagram of the tube end planar structure provided for an embodiment of this utility model;

[0045] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0046] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure at point BB. Detailed Implementation

[0047] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0048] To better understand the purpose, structure, and function of this utility model, a more detailed description of this utility model is provided below with reference to the accompanying drawings.

[0049] Reference Figures 1 to 4This application discloses a double-lobed automatic closing replacement pile driver, which is a device used to construct high-quality vertical drainage channels (granular material piles) in poor foundations such as saturated soft soil and silt. Its core innovation lies in the integration of a double-lobed automatic closing pile tip 7, which works in conjunction with other subsystems of the pile driver to fundamentally solve long-standing technical problems such as soft soil backflow, pile necking, and drainage channel blockage.

[0050] The pile frame and traveling mechanism: The pile frame, as the basic load-bearing structure of the entire equipment, adopts a space truss structure welded from high-strength steel, which has extremely high bending and torsional stiffness to ensure overall stability under strong vibration conditions.

[0051] The walking mechanism 1 adopts a fully hydraulic walking system. Specifically, it includes two long boats 11 and one medium boat 12. The long boats 11 and the medium boat 12 are connected by two first hydraulic cylinders, the extension and retraction of which drive relative displacement between the long boats 11 and the medium boat 12. Simultaneously, the pile frame is connected to the medium boat 12 by four second hydraulic cylinders, forming a "four-point support" system. By controlling the independent extension and retraction of these four hydraulic cylinders, not only can the pile frame be raised and lowered, but its verticality can also be precisely adjusted to ensure construction accuracy. During movement, the coordinated action of the first and second hydraulic cylinders achieves a cycle of "pick up - walk - put down - reset," enabling the pile driver to move stably and accurately in place on extremely soft ground.

[0052] The power head and pile pipe system include a vibrator 2, preferably a high-power, high-frequency hydraulic vibrator. It is suspended from the guide rail of the pile frame by a set of damping springs. This damping system effectively isolates most of the vibration transmitted to the pile frame, protecting the main structure and improving operational comfort. The vibrator 2 is connected to the hydraulic station 10 via a high-pressure hydraulic hose; the hydraulic station also provides power to the traveling mechanism. The hydraulic or electric vibrator can be directly mounted on top of the pile pipe and connected to the pile frame rail.

[0053] The pile pipe 6 is a thick-walled, high-strength steel pipe. Its upper part is rigidly connected to the output shaft of the vibrator 2 via a hydraulic clamp to ensure efficient transmission of vibration force. The inner wall of the pile pipe 6 can be coated with an ultra-high molecular weight polyethylene wear-resistant coating, which greatly reduces friction and wear with bulk materials and extends service life.

[0054] The double-lobed automatic closing pile tip 7 is detachably connected to the lower end of the pile tube 6 via a flange and high-strength bolts. This connection method facilitates the replacement of worn pile tips and adapts to the matching requirements of pile tubes of different sizes. (See attached image) Figure 2 As shown, the pile tip includes:

[0055] The main body of the pile tip is a cast steel or welded part, and is a streamlined cone shape to facilitate penetration.

[0056] The two hinged flaps 71, also made of cast steel or welded components, are hinged to the pile tip body via a hollow rotating shaft mandrel 72. If necessary, the hollow rotating shaft can be filled with long-lasting grease and sealed with an oil seal to ensure that the flaps can still rotate flexibly in muddy or sandy environments.

[0057] The bridge-top base plate 73 is welded to the inside of the valve 71. When the valve is closed, the two base plates fit together tightly to form a complete pressure-bearing sealing surface.

[0058] The pile tip rib 74 and wear-resistant alloy block are welded to the outside of the valve 71 to enhance its rigidity, while the tungsten carbide wear-resistant alloy block embedded in the surface of the rib 74 greatly improves the durability of the pile tip in hard or abrasive soil layers.

[0059] It should be noted that the main body of the pile tip is composed of two identical flaps 71. The flaps 71 are preferably forged or cast from high-strength alloy steel (such as Q345B) to ensure sufficient strength and wear resistance. The cross-section of the flaps 71 is semi-circular; when the two flaps 71 are closed, they together form an approximately conical or bullet-shaped tip to facilitate breaking through the soil during sinking.

[0060] The two flaps 71 are hinged together by the mandrel 72. In this embodiment, the mandrel 72 is a high-strength pin, and the upper part of the side wall of the flap 71 is provided with a shaft hole that mates with the pin. The mandrel 72 and the shaft hole are clearance-fitted to ensure that the flap 71 can rotate flexibly around the mandrel 72.

[0061] The bridge-top base plate 73 is welded and fixed to the bottom opening of the flap 71. The cross-section of the bridge-top base plate 73 is approximately an isosceles trapezoid, with its apex (i.e., the shorter base) facing inward towards the pile tip. During the sinking process, the resistance of the soil on the slope of the base plate generates a component force that causes the flap 71 to close; while during the upward pulling process, the gravity of the loose material (such as crushed stone) inside the pile tube acts on the apex and inner side of the base plate, generating an outward force that forces the two flaps 71 to open. When piles are formed in special layers with excessive shrinkage stress, a protruding ring must be added around the two flaps to form an inverted soil-blocking device. When the pile tube sinks to the design elevation, the soil outside the end will generate shrinkage compressive stress due to vibration and tighten the pile tube, thus forming a reverse resistance to the outer protruding part. When the pile tube is filled with bulk material and the pile tube is pulled up by vibration, the flap-type pile tip will achieve an inverted effect under the action of reverse resistance, forcibly causing the flap to open and smoothly and quickly unload the material inside the tube, forming a bulk material pile body (i.e., a vertical drainage channel).

[0062] To further enhance the overall rigidity and deformation resistance of the pile tip, two reinforcing ribs 74 are welded along the axial direction on the inner sidewall of each of the flaps 71. The ribs 74 are welded together with the flaps 71 and the bridge-top base plate 73 to form a stable support structure.

[0063] The pipe end connection is formed by the tops of two hinged flaps 71. Its inner wall is machined with internal threads for mating with the external threads at the bottom of the external pile pipe (such as the steel pipe of a vibratory pile driver). This threaded connection facilitates the installation and replacement of the pile tip.

[0064] The pile tip is screwed or welded to the bottom of the pile tube. The vibratory hammer is started, and the pile tube penetrates the soil under vibration and its own weight. At this time, the soil exerts upward resistance on the inclined surface of the bridge-top slab 73. This resistance is decomposed into a thrust on the flaps 71, causing the two flaps 71 to contract inward around the core rod 72, allowing the pile tube to sink smoothly. After the pile tube reaches the design elevation, loose material (such as crushed stone) is filled into the pile tube, and the vibratory hammer is started to begin pulling the tube upward. At this time, the loose material inside the pile tube, under the action of gravity, presses downward against the inner side and top edge of the bridge-top slab 73. Simultaneously, with the help of the inverted soil-blocking device, a force is formed that drives the two flaps 71 to rotate outward and downward around the core rod 72, causing the two flaps 71 to open rapidly. As the pile tube continues to rise, the pile tip remains open, and the loose material is continuously discharged from the bottom of the tube, filling the space left by the pile tube, ultimately forming the reinforced pile required for the composite foundation.

[0065] The outer wall of the pipe end connector is provided with external threads for connection with the internal threads at the bottom of the pile pipe. The pipe end connector and the pile pipe can be fixedly connected by welding. Specifically, the bottom end of the pile pipe is fitted onto the outside of the pipe end connector, and then fully welded circumferentially. This connection method is more robust and suitable for applications requiring repeated use. The cross-section of the bridge-top bottom plate is arc-shaped (such as arched), with its highest point facing inward towards the pile tip. This streamlined design also facilitates guidance during sinking and allows for opening under the weight of the material during upward pulling.

[0066] The feeding system consists of a winch 9, a wire rope 3, a guide pulley, and a feeding hopper 4.

[0067] The capacity of feeding hopper 4 is calculated to match the volume of the pile pipe, ensuring that the hopper can be filled with the amount required for one pipe extraction. Its bottom is designed with a hydraulically driven jaw gate, which is controlled by a special valve in the control room to achieve fast and accurate feeding, avoiding the uncertainty and danger of traditional manual feeding.

[0068] The hydraulic station 10 in the power and intelligent control system is driven by a diesel engine or a high-power motor, providing stable and reliable hydraulic power for the vibrator 2, all walking and leveling hydraulic cylinders, clamps and feeding hopper gates.

[0069] Control room 5 integrates a data acquisition and monitoring system, which includes:

[0070] The main controller is a programmable logic controller.

[0071] The sensor array includes a biaxial tilt sensor for monitoring the verticality of the pile pipe, an absolute encoder for real-time measurement of the sinking depth (calculated by measuring the extension and retraction of the wire rope), and pressure and flow sensors installed on the vibrator's hydraulic circuit.

[0072] The human-machine interface is a large touchscreen display that shows key parameters such as verticality, depth, vibration frequency, and hydraulic system pressure in real time, and includes data logging and over-limit alarm functions. Operators can easily control all machine movements using joysticks and buttons designed by Ergonomic.

[0073] In the auxiliary system, the counterweight 8 is installed at the rear of the pile frame via a guide rail slider mechanism. Its position can be moved back and forth by an adjustable hydraulic cylinder to optimize the overall stability of the machine according to different pile lengths and geological conditions.

[0074] The high-pressure air auxiliary system includes an air compressor driven by the main unit, an air tank, and an annular air pipe surrounding the lower inner wall of the pile tube. Multiple nozzles are evenly distributed along the air pipe, pointing towards the core of the tube. After material feeding or before tube removal, a solenoid valve can be briefly opened to spray pulsed high-pressure air, effectively breaking up any "bridging" or "blocking" phenomena that may form in the pile tube from the bulk material, ensuring smooth material feeding.

[0075] Its workflow is as follows:

[0076] The operator drives the walking mechanism from the control room 5 to move the pile driver to the digital pile position. By controlling the second hydraulic cylinder and observing the tilt sensor reading on the touch screen, the operator precisely adjusts the verticality of the pile frame and pile pipe 6 to within three-thousandths.

[0077] Start vibrator 2 and submerge it in the soil. The operator should closely monitor the depth sensor readings and hydraulic pressure changes on the screen. An abnormally high pressure may indicate the encounter with a hard layer, and the system will issue an alarm to assist the operator in making a judgment.

[0078] After the pile pipe reaches the design elevation, operate the winch 9 and the feeding hopper 4 to feed the bulk materials into the pile pipe. If there is suspicion of bridge construction risk, the high-pressure air auxiliary system can be activated for purging.

[0079] Restart vibrator 2 and slowly pull out the pipe at the set speed (usually 1-2 meters per minute). At this time, the bulk material inside the pile pipe, under the action of gravity, presses downwards against the bridge-top bottom plate 73, overcoming external soil pressure and forcing the two hinged valves 71 to open outwards around the axial direction. The bulk material is continuously filled into the formed cavity. The vibration compacts the filling material, forming a high-quality bulk material pile. Throughout the pipe pulling process, the pile tip automatically and reliably adjusts its opening according to the internal and external pressure difference, perfectly preventing soil shrinkage and backflow.

[0080] After the construction of one pile is completed, the system automatically records data such as the final depth and time of the pile. The operator then moves the machine to the next pile location and repeats the above intelligent process.

[0081] The electric or chain-driven pressurization system is used to apply additional pressure to the pile pipe when the pile length increases or the pile pipe encounters soil with high strength and cannot reach the design depth smoothly under the action of vibration, thereby helping to improve the sinking capacity.

[0082] The principle and function of the inverted soil-blocking device 13 are as follows:

[0083] The inverted soil-blocking device 13 is formed by an additional protrusion around the periphery of the flap-type pile tip. When the pile tube sinks to the design elevation, the soil outside the end will generate shrinkage compressive stress due to vibration and tighten the pile tube, thus forming a reverse resistance to the outer protrusion. When the pile tube is filled with bulk material and the vibration is turned on to pull the pile tube up, the flap-type pile tip will achieve an inverted effect under the action of the reverse resistance, forcibly causing the flap to open and smoothly and quickly unload the material inside the tube, forming a bulk material pile (i.e., a vertical drainage channel).

[0084] The technical effects achieved by the above technical solution in the embodiments of this application are as follows:

[0085] The double-lobed automatic closing pile tip eliminates soft soil backflow from its structural principle, ensuring the integrity and long-term effectiveness of the drainage channel. With the addition of a pressurization system, the pile pipe can smoothly penetrate harder soil layers. With the addition of an inverted soil-blocking device, the movable pile tip blades can be smoothly deployed under various adverse conditions. Through the integration of sensors and monitoring systems, the process is controllable, the results are verifiable, and the quality is reliable. The walking chassis is suitable for extremely soft foundations, and the automated feeding and anti-clogging design reduces manual intervention and downtime due to malfunctions, significantly improving construction efficiency.

[0086] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0087] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0088] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0089] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0090] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A double-lobe automatic closed replacement pile machine, characterized in that, include: Pile frame; A traveling mechanism is located at the bottom of the pile frame; A vibrator is mounted on the pile frame; The pile pipe, the upper end of which is connected to the output end of the vibrator; A feeding system, located at the upper end of the pile pipe, is used to inject bulk materials into the pile pipe; The double-lobed automatic closing pile tip is fixedly connected to the lower end of the pile pipe; the double-lobed automatic closing pile tip includes a pile tip body, which is formed by two lobes hinged together by a pivot, forming an openable and closable structure; A bridge-top base plate, which is fixedly connected to the bottom of the petal body; Electric or chain-driven pressurization systems are used to apply additional pressure to the pile pipe when the pile length increases or when the pile pipe encounters soil with high strength and cannot reach the design depth smoothly under vibration, in order to improve the pipe sinking capacity. The inverted soil-blocking device is formed by adding a ring of protrusions around the periphery of the flap-type pile tip. When the pile tube sinks to the design elevation, the soil outside the end will generate shrinkage compressive stress due to vibration, which will tighten the pile tube, thus forming a reverse resistance to the outer protrusion. When the pile tube is filled with bulk material and the vibration is turned on to pull the pile tube up, the flap-type pile tip will achieve an inverted effect under the action of the reverse resistance, forcibly causing the flap to open, accelerating the unloading of the material inside the tube, forming a bulk material pile body, which is a vertical drainage channel. The two petals, when enclosed at the top, form a pipe end connection for connecting with an external pile pipe.

2. The double-lobe automatic closure replacement pile machine according to claim 1, characterized in that, The walking mechanism is a walking mechanism, including a long boat and a middle boat, the long boat and the middle boat being connected by at least one first hydraulic cylinder; and / or, the pile frame is connected to the long boat or the middle boat by at least one second hydraulic cylinder to realize the lifting and leveling of the pile frame.

3. The double-lobe automatic closure replacement pile machine according to claim 1, characterized in that, The vibrator is a hydraulic or electric vibrator, which is connected to a hydraulic station mounted on the pile frame via hydraulic pipelines; the hydraulic station also provides power to the traveling mechanism; the electric vibrator can be directly installed on the top of the pile pipe and connected to the pile frame track.

4. The double-lobe automatic closure replacement pile machine according to claim 1, characterized in that, The pile pipe and the double-lobed automatic closing pile tip are detachably connected by a flange and bolts; or, the lower end of the pile pipe is directly welded to the pile tip body of the double-lobed automatic closing pile tip.

5. The double-lobe automatic closure replacement pile machine according to claim 1, characterized in that, The feeding system includes: hoist; The wire rope driven by the winch; and the feeding hopper connected to the wire rope; The pile frame is equipped with a guide pulley, and the wire rope passes around the guide pulley and connects to the feeding hopper, so that the feeding hopper can be lifted to the feeding position at the top of the pile pipe or lowered to the loading position on the ground under the control of the winch.

6. The double-lobe automatic closure replacement pile machine according to claim 5, characterized in that, The bottom of the feeding hopper is an openable structure, specifically a jaw gate or a tilting bottom plate, which is controlled by a set of lever mechanisms or a separate opening and closing cylinder.

7. The double-lobe automatic closure replacement pile machine according to claim 1, characterized in that, The outer side of the valve of the double-lobed automatic closing pile tip is provided with a reinforcing rib, and the surface of the reinforcing rib is embedded with a wear-resistant alloy block.

8. The double-lobe automatic closure replacement pile machine according to claim 1 or 7, characterized in that, A reinforcing rib is provided between the bridge-top bottom plate and the inner wall of the valve; and / or, the rotating shaft is a hollow core rod.

9. The double-lobe automatic closure replacement pile machine according to claim 1, characterized in that, The pile frame is equipped with an operating room, which integrates a control console. The control console includes a joystick, buttons, and a display screen for controlling the walking mechanism, positioning mechanism, vibrator, pile pipe sinking and electric or chain pressurization system, and feeding system.

10. The double-lobe automatic closure replacement pile machine according to claim 9, characterized in that, It also includes a data acquisition and monitoring system, which includes: An inclination sensor installed on the pile frame is used to monitor the verticality of the pile pipe; Depth sensors installed on vibrators or pile pipes are used to monitor the sinking depth; A pressure sensor installed in the hydraulic system is used to monitor the working pressure of the vibrator; The data acquisition and monitoring system is connected to the display screen in the control room to display construction parameters in real time.

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