Pile machine

Abstract

The utility model provides a pile machine, and relates to the technical field of pile foundation construction. The pile machine comprises a lower stand column, an upper stand column, a rotary assembly and a power head. The upper stand column is rotationally installed above the lower stand column, and the rotation assembly is connected with the upper stand column and used for enabling one of the multiple upper guide rails of the upper stand column to be in butt joint with the lower guide rail of the lower stand column to form a through guide rail. Driving rods are arranged on one sides of the lower guide rail and the upper guide rail; the driving rod is provided with a plurality of loading positions, and the power head is in sliding connection with the through guide rail and can be connected with any loading position. According to the pile machine, position adjustment of the power head on the driving rod can be achieved through the multiple loading positions, the drilling process of the driving rod can be achieved without the need that the power head rises to the top of the stand column, and the upper stand column is driven to rotate through the rotary assembly and then matched with sliding of the power head on the through guide rail; the multiple driving rods between the upper guide rail and the lower guide rail can be sequentially connected and drill downwards, so that the drilling depth of the driving rods meets the piling depth, and the height of the stand column does not need to be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation construction, in particular to a pile driver. Background Art

[0002] During the construction of bored cast-in-place piles, a soil-squeezing or soil-extracting drill is used to drill into the soil to form a pile hole. After the drilling is completed, the hollow part of the drill pipe can be used as a grouting channel to pour materials into the pile hole to form a pile body.

[0003] During the construction of bored piles, a drill with a total length greater than the designed pile length is required to be used vertically on the ground to take soil or squeeze soil to drill holes. The drill itself weighs about 0.6 to 0.8 tons per meter, and the top of the drill also needs to be equipped with a power head weighing 10 to 20 tons and a grouting device weighing about 0.8 tons. The power head is used to drive the drill to rotate, and the grouting device is used to connect the drill and the connecting pipe on the pump truck for pumping slurry. The above drill, power head and grouting device are usually slidably installed on the slide rail of the column on one side of the pile driver. The power head, grouting device and drill can be raised and lowered on the slide rail through the pressurization and lifting mechanism equipped on the pile driver. A rotating mechanism is embedded inside the power head, which is connected to the drill and used to drive the drill to rotate while the power head is raised and lowered. The grouting device is used to cooperate with the pump truck connecting pipe and the drill, so that the pump truck can transport the slurry it loads to the pile hole drilled by the drill.

[0004] However, the height of the columns and drill tools equipped in the existing pile drivers has not exceeded 80 meters. For example, when the designed pile length is 60 meters, the total length of the drill tool must be greater than 60 meters, and the length of the column as the support mechanism for the drilling and lifting of the drill tool is even longer. In addition, since the drill tool needs to be vertical to the ground when working, and the power head, drill tool, grouting device and other tonnage-level equipment are all installed at the column, so not only a higher column is required on one side of the pile driver, but also the top of the column usually weighs about 60 tons because the power head is raised to a high place. , which brings two fatal problems: First, the drill tool is too long, which causes the column to be too high and the power head often needs to be raised to the top of the column, resulting in an extremely high center of gravity of the pile driver, which is prone to collapse and other accidents; Second, the drill tool is a long and thin rod. During the construction of bored piles, not only the top of the drill tool will be affected by the weight of the power head and the grouting device, but the bottom of the drill tool will also be affected by the side limit of the surrounding soil, causing the drill tool to be severely bent in the middle and easy to break, thereby affecting the verticality of the drilling construction and reducing the quality of the pile.

[0005] In order to solve the problem of the high center of gravity of the pile driver, patent CN208950504U proposes a solution of equipping two sets of power heads and drilling tools on the column of the pile driver. The working principle is that when the first set of power heads and drilling tools drill to the end of the stroke, the first set of power heads are disengaged from the first set of drilling tools, and the first set of power heads are raised to the top of the column. Then, through the deflection of the entire pile driver, the second set of drilling tools is connected to the first set of drilling tools in a position, and then the second set of power heads continues to drill. However, this patent only reduces the excessive height of the column by combining drilling tools, thereby reducing the center of gravity of the pile driver. It does not solve the problem that the drilling tools are easily broken due to excessive bending. In addition, this patent requires the use of two sets of power heads and drilling tool systems, which doubles the weight of the top of the column. When the pile driver deflects, it will not only cause the pile driver to generate a large centrifugal force, making the machine more likely to collapse, but also cause the column to be subjected to a large bending moment, which greatly tests the structural strength of the column. In addition, the power head is the most core and expensive component of the entire pile driver. Using two sets of power heads and drilling tools will undoubtedly greatly increase the cost of the pile driver and is not conducive to the promotion and use of the pile driver.

[0006] Patent CN204212716U proposes a scheme of setting a swing arm mechanism on the side of the column and then vertically suspending the drill tool on the swing arm mechanism. The working principle of this scheme is that when the first drill tool drills to the end of the stroke, the power head is disengaged from the first drill tool and rises to the top of the column, and the second drill tool vertically suspended thereon is swung to align with the first drill tool through the swing arm mechanism, and then the second drill tool is aligned and connected with the power head and the first drill tool respectively. However, this patent also reduces the height of the column by combining drilling tools, but does not solve the problem that the power head is raised to the top of the column, resulting in a heavy weight on the top of the column, which makes the pile driver easy to collapse, and does not solve the problem that the drill tool is easy to bend and break.

[0007] Patent CN113790033A proposes a solution of setting up an additional lifting mechanism. The working principle of this solution is that when the first drilling tool reaches the end of the stroke, the power head is disconnected from the first drilling tool and rises back to the top of the column. Then the second drilling tool is lifted to a position aligned with the first drilling tool through the lifting mechanism, and the second drilling tool is connected to the first drilling tool and the power head. This patent still does not solve the problem that the power head is raised to the top of the column, resulting in a heavy weight on the top of the column, which makes the pile driver easy to collapse, and also does not solve the problem that the drilling tool is easy to bend and break.

[0008] Patent CN212296220U is a technology proposed by the applicant in the early stage. The drill tool of the pile driver disclosed in the patent can pass through the power head, and the drill tool is divided into two parts. The first part is a drill rod with spiral blades located at the bottom for soil extraction or soil extrusion construction, and the second part is a drive rod located at the top with multiple loading positions that can match the drive shaft of the power head in the vertical direction. Through the matching of the drive shaft of the power head with different loading positions of the drive rod, the power head is always located in the lower half of the column without rising to the top of the column. The advantage of this patent is that the power head is set at the waist of the drill tool. After the power head drives the drill tool to drill, the power head is gradually lifted on the loading position on the drill tool and the drilling process is repeated to continuously increase the drilling depth. During the whole drilling process, the power head always keeps running at the waist of the column to a position close to the ground, which can not only reduce the center of gravity of the pile driver, but also can use the power head as the middle fulcrum of the drill tool to effectively resist the bending moment and prevent the drill tool from being bent and broken. However, the pile driver disclosed in the patent has limited effect on increasing the drilling depth. As the pile driving depth requirement increases, it is still necessary to increase the height of the drill bit and then the height of the column to meet the pile driving depth, which will also cause the problem of a higher center of gravity of the pile driver.

[0009] Based on this, for construction scenarios with higher requirements for piling depth, existing pile drivers may have the problem that the power head needs to be raised to the top of the column, resulting in a heavier weight on the top of the column, which may cause the pile driver to collapse easily and the drill bit to bend and break easily. Or there may be a problem that the column height needs to be raised to meet the piling depth, but this will cause the center of gravity of the entire pile driver to be higher. Utility Model Content

[0010] The utility model aims to provide a pile driver to alleviate the construction scenarios with high requirements for pile driving depth in the prior art. The existing pile drivers either need to raise the power head to the top of the column, resulting in a heavy weight on the top of the column, which makes the pile driver easy to collapse and the drilling tool easy to bend and break, or need to raise the height of the column to meet the pile driving depth, but this will result in a technical problem of a higher center of gravity of the pile driver.

[0011] In a first aspect, the utility model provides a pile driver, comprising a lower column, an upper column, a rotary assembly and a power head;

[0012] The lower column is provided with a lower guide rail extending along its axial direction, and the upper column is provided with a plurality of upper guide rails extending along its axial direction, and the plurality of upper guide rails are sequentially distributed along the circumference of the upper column;

[0013] The upper column is rotatably mounted above the lower column, the slewing assembly is connected to the upper column, and the slewing assembly is used to drive the upper column to rotate, so that one of the multiple upper guide rails on the upper column is selectively connected to the lower guide rail to form a through guide rail;

[0014] A driving rod is provided on one side of the lower guide rail and at least one of the upper guide rails, and after the upper guide rail is docked with the lower guide rail to form the through guide rail, the driving rod on one side of the upper guide rail can slide downward and dock with the driving rod on one side of the lower guide rail;

[0015] Each of the driving rods is provided with a plurality of loading positions distributed in sequence along its axial direction. The power head is slidably connected to the through guide rail. The power head can move relative to the driving rod on the through guide rail and be connected to any of the loading positions on the driving rod. The power head is used to drive the driving rod to rotate and slide on the through guide rail after being connected to the loading position of the driving rod.

[0016] In an optional embodiment, a grouting device is further included, and the grouting device is detachably connected to the top end of the uppermost driving rod on the through guide rail.

[0017] In an optional embodiment, one of the plurality of upper guide rails is a main guide rail, and the remaining upper guide rails are auxiliary guide rails, and each of the auxiliary guide rails is slidably connected to a driving rod;

[0018] The upper column is provided with a plurality of lifting assemblies, and the plurality of lifting assemblies are arranged in one-to-one correspondence with the plurality of upper guide rails, and the lifting assemblies arranged corresponding to the main rails are connected to the grouting device, and the lifting assemblies arranged corresponding to the auxiliary guide rails are connected to the driving rods on the corresponding auxiliary guide rails.

[0019] In an optional embodiment, the lifting assemblies corresponding to the multiple auxiliary guide rails and the grouting device are provided with connectors, the connector on the grouting device is used for detachable connection with the top end of the uppermost driving rod on the through guide rail, and the connector on the lifting assemblies corresponding to the auxiliary guide rails is used for detachable connection with the driving rod on the corresponding auxiliary guide rails.

[0020] In an optional embodiment, the top end of each of the driving rods is provided with a joint for connecting with the connector, and the side wall of the joint at the top end of the driving rod is provided with a groove;

[0021] The connector includes a telescopic drive device and a pin shaft arranged at the output end of the telescopic drive device. The pin shaft is used to move in and out of the groove along the axial direction perpendicular to the drive rod below the connector under the drive of the telescopic drive device to connect or separate the drive rod and the connector.

[0022] In an optional embodiment, a plurality of hanging arms distributed in sequence along its circumference are fixed to the top end of the upper column, the plurality of hanging arms are distributed one-to-one above the plurality of upper guide rails, and the plurality of lifting assemblies are installed one-to-one on the plurality of hanging arms.

[0023] In an optional embodiment, an upper protective sleeve is provided at each of the secondary guide rails of the upper column, and the upper protective sleeve is sleeved outside the driving rod on the secondary guide rail at the position where the upper protective sleeve is located.

[0024] In an optional embodiment, a plurality of lower trays are provided on the lower column, and the plurality of lower trays are located one by one below the driving rods on the plurality of secondary guide rails to support the driving rods on the plurality of secondary guide rails.

[0025] In an optional embodiment, the lower tray is in a groove shape, and the space in the groove of the lower tray is used to accommodate the bottom end of the driving rod on the secondary guide rail.

[0026] In an optional embodiment, a lower protective sleeve is provided on the lower guide rail of the lower column, and the hollow part of the lower protective sleeve is opposite to the output end of the power head. The lower protective sleeve can be sleeved outside the driving rod when the power head drives the driving rod connected to it to slide on the lower guide rail.

[0027] The pile driver provided by the utility model comprises a lower column, an upper column, a slewing assembly and a power head; the lower column is provided with a lower guide rail extending along its axial direction, the upper column is provided with a plurality of upper guide rails extending along its axial direction, and the plurality of upper guide rails are sequentially distributed along the circumferential direction of the upper column; the upper column is rotatably installed above the lower column, the slewing assembly is connected with the upper column, and the slewing assembly is used to drive the upper column to rotate, so that one of the plurality of upper guide rails on the upper column is selectively docked with the lower guide rail and forms a through guide rail; a driving rod is provided on one side of the lower guide rail and at least one of the upper guide rails, and after the upper guide rail is docked with the lower guide rail to form a through guide rail, the driving rod on one side of the upper guide rail can slide downward and dock with the driving rod on one side of the lower guide rail; each driving rod is provided with a plurality of loading positions sequentially distributed along its axial direction, the power head is slidably connected with the through guide rail, the power head can move relative to the driving rod on the through guide rail and be connected with any loading position on the driving rod, and the power head is used to drive the driving rod to rotate and slide on the through guide rail at the same time after being connected with the loading position of the driving rod. The pile driver provided by the utility model is used for the construction of pile foundations such as bored piles. When constructing bored piles, the pile driver can be first moved to the construction position of the pile foundation, and driving rods can be erected on one side of the upper guide rail and one side of the lower guide rail respectively. In order to facilitate the grouting operation, the driving rods need to adopt a hollow structure at this time. Then the driving rod on one side of the lower guide rail can be located just above the soil at the designed pile position of the pile foundation, and then the power head is connected to any loading position of the driving rod on one side of the lower guide rail away from the top. Then the power head is started to drive the driving rod to rotate, and at the same time, the power head is made to slide downward on the lower guide rail to drive the driving rod to move downward. After the driving rod rotates and moves downward, it will rotate and drill into the soil at the designed pile position, realizing the drilling process of the driving rod. When the rod body of the driving rod located between the power head and its bottom end is drilled into the soil, the power head is separated from the current loading position, and the power head is made to slide upward on the lower guide rail, and then the power head is connected to any loading position of the driving rod located above the soil. Then restart the power head and make it slide downward on the lower guide rail, so as to continue to drive the driving rod to drill down with the power head, and repeat the above process of continuing to drive the driving rod to drill down until the entire rod body of the driving rod is drilled into the soil. Because during the above process of driving rod drilling down, when the driving rod is drilled down for the first time, the power head is connected to any loading position of the driving rod away from the top, that is, the power head is not connected to the top of the driving rod, and will not be at the top of the lower column, and when the driving rod is drilled down subsequently, part of the rod body of the driving rod has been drilled into the soil, even if the power head is connected to the loading position close to the top of the driving rod at this time, it will not be at the top of the column. Therefore, during the whole process of the power head in the pile driver provided by the utility model driving the driving rod to drill down, the power head can be avoided from being located at the top of the lower column, thereby effectively preventing the driving rod from being bent and broken, and at the same time preventing the weight at the top of the lower column from being too large, thereby effectively reducing the risk of collapse of the pile driver.

[0028] It should be noted that in order to prevent a single driving rod from being too long and affecting the center of gravity of the pile driver, the length of a single driving rod is usually much shorter than the designed pile length, that is, after the entire rod body of the driving rod on one side of the lower guide rail is drilled into the soil, the rod length of the driving rod drilled into the soil does not meet the requirements of the designed pile length. The pile driver provided by the utility model can utilize multiple driving rods to be connected and drilled in sequence so that the total length of the driving rod drilled meets the requirements of the designed pile length. Specifically, after the entire rod body of the driving rod on one side of the lower guide rail is drilled into the soil, the rotary assembly is started, and the rotary assembly is used to drive the upper column to rotate, so that the upper guide rail with a driving rod on one side is docked with the lower guide rail to form a through guide rail. Then the power head can be separated from the current loading position of the driving rod and raised to the upper guide rail in the through guide rail, and then the power head can be connected to any loading position of the driving rod on one side of the upper guide rail. At this time, in order to prevent the power head from being at the top of the upper column and causing the center of gravity of the pile driver to be higher, the power head can be connected to the loading position of the driving rod away from the top. After the power head is connected to the loading position of the driving rod on one side of the upper guide rail, the power head is used to drive the driving rod on one side of the upper guide rail to move downward along the through guide rail. When the bottom end of the driving rod moves to contact the top end of the driving rod that has been drilled into the soil, since the top end of the driving rod that has been drilled into the soil is approximately flush with the ground, the construction personnel can easily connect the bottom end of the driving rod that has been lowered on the through guide rail with the top end of the driving rod that has been drilled into the soil on the ground. Alternatively, after the upper column is driven to rotate by the slewing assembly and a through guide rail is formed, the power head is separated from the loading position of the current driving rod and only raised to one side of the lower guide rail, and then other external driving devices are used to drive the driving rod on one side of the upper guide rail to descend. When the driving rod descends to the power head, the power head is connected to the loading position of the driving rod, and then the driving rod is driven to continue to descend by the power head until the bottom end of the driving rod contacts the top end of the driving rod that has been drilled into the soil, and then the driving rods are docked. After the docking process of the driving rods is completed, the power head is started again, and the power head is allowed to continue to descend, so that the power head can drive the docked driving rod to continue to drill downward into the soil. After the rod body of the connected driving rod located below the power head drills into the soil, the power head is separated from the current loading position of the driving rod and continues to rise along the through guide rail. The power head can then be connected to any loading position of the driving rod on one side of the through guide rail located above the soil, and then the above process of starting the power head and allowing the power head to continue to descend is repeated until all the rod bodies of all the connected driving rods are drilled into the soil.At this time, it can be judged whether the total rod length of the driving rod drilled into the soil reaches the designed pile length. If it reaches it, the drilling process is stopped and the hollow part of the driving rod is used as a grouting channel for grouting operation to form a pile; if it does not reach it, the rotary assembly and subsequent operations are repeatedly started, so that the driving rods on the other upper guide rails of the upper column are sequentially docked with the driving rods that have been drilled into the soil and drilled sequentially until the total rod length of the driving rods drilled into the soil reaches the designed pile length. It can be seen that the pile driver provided by the utility model drives the upper column to rotate through the rotary assembly and then cooperates with the sliding of the power head on the through guide rail, so that the driving rods on each side of the upper guide rail and the driving rods on the side of the lower guide rail can be sequentially docked during the drilling process, thereby realizing the sequential connection and drilling process of multiple driving rods, so that the total drilling depth of the driving rods meets the designed pile length (that is, the pile driving depth), and there is no need to increase the height of the upper column or the lower column, which can effectively avoid the problem of a high center of gravity of the pile driver. In addition, during the process of docking the driving rod, even if the power head needs to rise to the upper guide rail to connect with the driving rod on one side of the upper guide rail, based on the fact that there are multiple loading positions on the driving rod, it is still possible to avoid the power head from being connected to the loading position close to the top of the driving rod on one side of the upper guide rail. Similarly, the multiple loading positions on the driving rod can be used to adjust the position of the power head on the driving rod, thereby avoiding the power head from being located at the top of the upper column, thereby reducing the weight of the top of the upper column to reduce the risk of collapse of the pile driver and prevent the driving rod from being bent and broken during drilling.

[0029] Compared with the prior art, the pile driver provided by the utility model can realize the position adjustment of the power head on the driving rod by arranging multiple loading positions on the driving rod and connecting the power head to any loading position. The driving rod can be driven to rotate and move downward without raising the power head to the top of the column, thereby realizing the drilling process of the driving rod, which can effectively prevent the weight on the top of the column from being too heavy, reduce the risk of collapse of the pile driver, and prevent the driving rod from being bent and broken during the drilling process; and the pile driver can use the rotary assembly to rotate the upper column after the driving rod on one side of the lower guide rail drills, thereby rotating the driving rod on one side of the upper guide rail to above the lower guide rail, and then drill the driving rod above the lower guide rail through the through guide rail and the power head, thereby realizing the sequential docking and drilling of the driving rod, and the total length of the driving rod after drilling can meet the piling depth without raising the height of the column, thereby preventing the problem of a high center of gravity of the pile driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of the structure of a pile driver provided by an embodiment of the utility model;

[0032] Figure 2 A schematic diagram of the structure of a pile driver when the power head provided by an embodiment of the utility model is connected to a loading position of a driving rod on one side of a lower guide rail away from the top;

[0033] Figure 3 A schematic diagram of the structure of a pile driver when a driving rod part of a lower guide rail provided by an embodiment of the utility model is drilled into the soil;

[0034] Figure 4 A schematic diagram of the structure of a pile driver provided by an embodiment of the utility model, in which a driving rod part on one side of the lower guide rail is drilled into the soil and the power head is raised;

[0035] Figure 5 A schematic structural diagram of a pile driver when the entire shaft of a driving rod on one side of a lower guide rail provided by an embodiment of the utility model is drilled into the soil;

[0036] Figure 6 A schematic diagram of the structure of a pile driver provided by an embodiment of the utility model, in which the top end of a driving rod on one side of a lower guide rail is connected to a grouting device after the entire rod body is drilled into the soil;

[0037] Figure 7 A schematic diagram of the structure of the pile driver provided by the embodiment of the utility model when the entire rod body of the driving rod on one side of the lower guide rail is drilled into the soil and the grouting device is separated from the top end of the driving rod and rises, and the power head is separated from the current loading position and rises;

[0038] Figure 8 A schematic diagram of the structure of the pile driver provided by the embodiment of the utility model when the entire shaft of the driving rod on one side of the lower guide rail is drilled into the soil and the rotary assembly drives the upper column to rotate;

[0039] Fig. 9 A schematic diagram of the structure of the pile driver when the entire rod body of the driving rod on one side of the lower guide rail provided by the embodiment of the utility model is drilled into the soil and the rotary assembly drives the upper column to rotate to form a through guide rail;

[0040] Fig.10 A schematic diagram of the structure of a pile driver provided by an embodiment of the utility model when a driving rod on one side of an upper guide rail is lowered to a point where its bottom end contacts the top end of the driving rod drilled into the soil;

[0041] Fig.11 A schematic diagram of the structure of the pile driver provided by the embodiment of the utility model when the power head continues to descend after the driving rod on one side of the upper guide rail is connected with the driving rod drilled into the soil;

[0042] Fig.12A schematic structural diagram of a pile driver provided in an embodiment of the utility model when the driving rod shaft below the power head drills into the soil and the power head rises and connects with the loading position of the driving rod located above the soil;

[0043] Fig.13 A schematic diagram of the structure of the pile driver provided by the embodiment of the utility model when the driving rod is connected and the rotary assembly drives the upper column to rotate in the opposite direction;

[0044] Fig.14 A schematic diagram of the structure of the pile driver provided by the embodiment of the utility model when the grouting device is located above the power head again after the rotary assembly drives the upper column to rotate in the reverse direction;

[0045] Fig.15 A schematic structural diagram of a pile driver provided in an embodiment of the utility model when a grouting device relocated above a power head is lowered and connected to the top end of a driving rod connected to the power head;

[0046] Fig.16 A schematic diagram of the structure of a pile driver when a driving rod is being drilled after being driven by a power head provided in an embodiment of the utility model;

[0047] Fig.17 A cross-sectional view of the connection between the grouting device and the driving rod provided in an embodiment of the utility model;

[0048] Fig.18 A schematic diagram of the local structure of two adjacent driving rods before docking provided by an embodiment of the utility model.

[0049] Icons: 1-lower column; 10-lower guide rail; 11-lower tray; 12-lower casing; 2-upper column; 20-upper guide rail; 21-upper casing; 3-slewing assembly; 4-power head; 5-drive rod; 50-loading position; 51-drill rod; 52-latch; 6-grouting device; 7-lifting assembly; 8-connector; 80-telescopic drive device; 81-pin shaft; 9-jib. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0053] Example:

[0054] like Figure 1 As shown, the pile driver provided in this embodiment includes a lower column 1, an upper column 2, a slewing assembly 3 and a power head 4; the lower column 1 is provided with a lower guide rail 10 extending along its axial direction, and the upper column 2 is provided with a plurality of upper guide rails 20 extending along its axial direction, and the plurality of upper guide rails 20 are sequentially distributed along the circumference of the upper column 2; the upper column 2 is rotatably mounted above the lower column 1, the slewing assembly 3 is connected to the upper column 2, and the slewing assembly 3 is used to drive the upper column 2 to rotate, so that one of the plurality of upper guide rails 20 on the upper column 2 is selected to dock with the lower guide rail 10 and form a through guide rail; the lower guide rail 10 and at least one upper guide A driving rod 5 is provided on one side of the rail 20, and after the upper guide rail 20 is docked with the lower guide rail 10 to form a through guide rail, the driving rod 5 on one side of the upper guide rail 20 can slide downward and dock with the driving rod 5 on one side of the lower guide rail 10; each driving rod 5 is provided with a plurality of loading positions 50 distributed in sequence along its axial direction, and the power head 4 is slidably connected to the through guide rail. The power head 4 can move relative to the driving rod 5 on the through guide rail and be connected to any loading position 50 on the driving rod 5. The power head 4 is used to drive the driving rod 5 to rotate and slide on the through guide rail after being connected to the loading position 50 of the driving rod 5.

[0055] The pile driver provided in this embodiment is used for the construction of pile foundations such as bored piles. When constructing bored piles, the pile driver can be first moved to the construction position of the pile foundation, and driving rods 5 are erected on one side of the upper guide rail 20 and one side of the lower guide rail 10 respectively. In order to facilitate the grouting operation, the driving rods 5 need to adopt a hollow structure at this time.

[0056] In addition, a hollow space may be provided in the middle of the power head 4, and the output end of the power head 4 is provided in the hollow space. When the power head 4 is connected to the loading position 50 of the driving rod 5, the power head 4 is sleeved outside the driving rod 5 and the output end of the hollow space and the loading position 50 of the driving rod 5 are connected to each other by a snap connection. The structure of the loading position 50 of the driving rod 5 and the connection method with the power head 4 can refer to patent CN212296220U, which will not be repeated here.

[0057] Then Figure 2 As shown, the driving rod 5 on one side of the lower rail 10 can be located directly above the soil at the designed pile position of the pile foundation, and then the power head 4 is connected to any loading position 50 of the driving rod 5 on one side of the lower rail 10 away from the top. Figure 3 As shown, the power head 4 is then started to drive the driving rod 5 to rotate, and at the same time, the power head 4 is made to slide downward on the lower guide rail 10 to drive the driving rod 5 to move downward. After the driving rod 5 rotates and moves downward, it rotates and drills into the soil at the designed pile position, thereby realizing the drilling process of the driving rod 5. It should be noted that, in order to facilitate the driving rod 5 on one side of the lower guide rail 10 to drill into the soil, a drill rod 51 with a drill bit can be pre-connected below the driving rod 5 on one side of the lower guide rail 10, and the rod body of the drill rod 51 is provided with a spiral blade extending spirally along its axial direction.

[0058] When the rod body of the driving rod 5 located between the power head 4 and its bottom end is drilled into the soil, Figure 4 As shown, the power head 4 is disengaged from the current loading position 50, and the power head 4 is slid upward on the lower guide rail 10, and then the power head 4 is connected to any loading position 50 of the driving rod 5 located above the soil. Figure 5 As shown, restart the power head 4 and slide the power head 4 downward on the lower guide rail 10, so that the power head 4 continues to drive the driving rod 5 to drill, and repeat the above process of continuing to drive the driving rod 5 to drill until the entire rod body of the driving rod 5 is drilled into the soil.

[0059] During the drilling process of the driving rod 5 mentioned above, when the driving rod 5 is drilled for the first time, the power head 4 is connected to any loading position 50 of the driving rod 5 away from the top, that is, the power head 4 is not connected to the top of the driving rod 5, and will not be at the top of the lower column 1, and when the driving rod 5 is drilled subsequently, part of the rod body of the driving rod 5 has been drilled into the soil, even if the power head 4 is connected to the loading position 50 close to the top of the driving rod 5 at this time, it will not be at the top of the column. Therefore, during the whole process of the power head 4 in the pile driver provided by this embodiment driving the driving rod 5 to drill, it is possible to avoid the power head 4 being located at the top of the lower column 1, thereby effectively preventing the driving rod 5 from being bent and broken, and at the same time preventing the weight at the top of the lower column 1 from being too heavy, thereby effectively reducing the risk of collapse of the pile driver.

[0060] When the driving rod 5 on one side of the lower guide rail 10 is completely drilled into the soil, if the length of the driving rod 5 in the soil meets the design pile length requirement, the drilling process is stopped, and Figure 6As shown, the grouting device 6 is connected to the top of the driving rod 5, and the grouting device 6 is connected to the grouting pipe on the grouting vehicle. The grouting device 6 can not only connect the driving rod 5 and the grouting pipe, but also seal the connection between the driving rod 5 and the grouting pipe. Since the structure of the grouting device 6 is a prior art, the structure and working principle of the grouting device 6 are not repeated here. However, in this embodiment, the grouting device 6 can be pre-installed at the top of the upper column 2, and in the initial state of the pile driver, one side of one of the upper guide rails 20 on the upper column 2 may not be provided with the driving rod 5, and the upper guide rail 20 has been docked with the lower guide rail 10 to form an initial through guide rail, and then the external driving device can be used to drive the grouting device 6 to descend along the initial through guide rail to the top of the driving rod 5 drilled into the soil, and then the grouting device 6 is used to connect the driving rod 5 and the grouting pipe, and then the driving rod 5 is lifted, and the hollow part of the driving rod 5 is used as a grouting channel, and the grouting liquid is poured into the pile hole formed after the driving rod 5 is lifted to form a pile body.

[0061] It should be noted that, in order to prevent a single driving rod 5 from being too long and affecting the center of gravity of the pile driver, the rod length of a single driving rod 5 is usually much shorter than the designed pile length, that is, after the entire rod body of the driving rod 5 on one side of the lower guide rail 10 is drilled into the soil, the rod length of the driving rod 5 drilled into the soil usually does not meet the designed pile length requirement.

[0062] In order to solve the problem that the length of the single driving rod 5 is less than the designed pile length requirement, the pile driver provided in this embodiment can use multiple driving rods 5 to be connected and drilled in sequence so that the total drilling length of the driving rods 5 meets the designed pile length requirement. Specifically, after all the driving rods 5 on one side of the lower guide rail 10 are drilled into the soil, the pile driver 10 is firstly connected to the soil body, and then the pile driver 10 is ... Figure 7 As shown, the grouting device 6 is separated from the top of the driving rod 5 and the grouting device 6 is raised to the top of the upper column 2 along the initial through rail, and the power head 4 on the driving rod 5 is separated from the current loading position 50 and the power head 4 is raised. Figure 8 and Fig. 9As shown, the slewing assembly 3 is started and the upper column 2 is driven to rotate by the slewing assembly 3, so that the upper guide rail 20 with a driving rod 5 on one side is docked with the lower guide rail 10 to form a new through guide rail. The slewing assembly 3 can adopt a slewing support turntable. Then the power head 4 can be raised to the upper guide rail 20 in the new through guide rail, and then the power head 4 can be connected to any loading position 50 of the driving rod 5 on one side of the upper guide rail 20. At this time, in order to prevent the power head 4 from being at the top of the upper column 2 and causing the center of gravity of the pile driver to be higher, the power head 4 can be connected to the loading position 50 away from the top of the driving rod 5. After the power head 4 is connected to the loading position 50 of the driving rod 5 on one side of the upper guide rail 20, the power head 4 is used to drive the driving rod 5 on one side of the upper guide rail 20 to move downward along the new through guide rail. When the bottom end of the driving rod 5 moves to contact the top end of the driving rod 5 drilled into the soil, since the top end of the driving rod 5 drilled into the soil is approximately flush with the ground, the construction personnel can easily connect the bottom end of the driving rod 5 that has been lowered on the new through guide rail with the top end of the driving rod 5 that has been drilled into the soil on the ground.

[0063] Alternatively, after the upper column 2 is driven to rotate by the slewing assembly 3 and a new through rail is formed, only the power head 4 is raised to one side of the lower rail 10, and then Fig.10 As shown, other external driving devices are used to drive the driving rod 5 on one side of the upper guide rail 20 to descend. When the driving rod 5 descends to the power head 4, the power head 4 is connected to the loading position 50 of the driving rod 5, and then the power head 4 is used to drive the driving rod 5 to continue to descend until the bottom end of the driving rod 5 contacts the top end of the driving rod 5 drilled into the soil, and then the docking process between the driving rods 5 is performed. It can be seen that the power head 4 in the pile driver provided in this embodiment can realize the drilling and docking process of the driving rod 5 under the premise of always being located on one side of the lower guide rail 10 without rising to the side of the upper guide rail 20, and further effectively prevent the weight on the top of the column from being too heavy.

[0064] After the driving rod 5 is connected, Fig.11 As shown, the power head 4 is started and the power head 4 is made to continue to descend, so that the power head 4 drives the connected driving rod 5 to continue to drill into the soil. Fig.12 As shown, the power head 4 is separated from the loading position 50 of the current driving rod 5, and the power head 4 continues to rise along the new through rail, and then the power head 4 can be connected to any loading position 50 of the driving rod 5 located above the soil on one side of the new through rail, and then Fig.16 As shown, the above process of starting the power head 4 and allowing the power head 4 to continue to descend is repeated until all the rod bodies of all the connected driving rods 5 are drilled into the soil.

[0065] In this process, it can also be determined whether the total rod length of the driving rod 5 drilled into the soil reaches the designed pile length. If it reaches the designed pile length, the drilling process is stopped and the hollow part of the driving rod 5 is used as a grouting channel for grouting to form a pile. It should be noted that since the grouting device 6 also rotates to the other side of the new through-guide rail after the rotary assembly 3 drives the upper column 2 to rotate, the grouting device 6 is no longer located above the power head 4. At this time, the position of the grouting device 6 is restored before grouting. Fig.13 and Fig.14 As shown, the rotary assembly 3 can be started to drive the upper column 2 to rotate in the opposite direction, so that the grouting device 6 at the top of the upper column 2 is relocated above the power head 4, and then Fig.15 As shown, the grouting device 6 is driven downward by an external driving device so that the grouting device 6 located above the power head 4 again communicates with the top end of the driving rod 5 connected to the power head 4 .

[0066] In the above judgment process, if the total rod length of the driving rod 5 drilled into the soil does not reach the designed pile length, the process of repeatedly starting the rotating assembly 3 to drive the upper column 2 to rotate to form a new through guide rail and lowering the driving rod 5 on one side of the upper guide rail 20 in the new through guide rail and docking it with the driving rod 5 in the soil, so that the driving rods 5 on the other side of the upper guide rail 20 of the upper column 2 are docked with the driving rods 5 drilled into the soil in turn and drilled down in turn until the total rod length of the driving rods 5 drilled into the soil reaches the designed pile length.

[0067] It can be seen that the pile driver provided in this embodiment drives the upper column 2 to rotate through the slewing assembly 3 and then cooperates with the sliding of the power head 4 on the through guide rail, so that the driving rod 5 on one side of each upper guide rail 20 and the driving rod 5 on one side of the lower guide rail 10 can be connected in sequence during the drilling process, thereby realizing the sequential connection and drilling process of multiple driving rods 5, so that the total drilling depth of the driving rod 5 meets the designed pile length (that is, the piling depth), and there is no need to increase the height of the upper column 2 or the lower column 1, which can effectively avoid the problem of a high center of gravity of the pile driver. In addition, during the process of docking the driving rod 5, even if the power head 4 needs to rise to the upper guide rail 20 to connect with the driving rod 5 on one side of the upper guide rail 20, the driving rod 5 is provided with a plurality of loading positions 50. Therefore, at this time, the power head 4 can still be prevented from being connected to the loading position 50 close to the top of the driving rod 5 on one side of the upper guide rail 20. Similarly, the plurality of loading positions 50 on the driving rod 5 can be used to adjust the position of the power head 4 on the driving rod 5, thereby preventing the power head 4 from being located at the top of the upper column 2, thereby reducing the weight of the top of the upper column 2 to reduce the risk of collapse of the pile driver and prevent the driving rod 5 from being bent and broken during the drilling process.

[0068] Compared with the prior art, the pile driver provided in the present embodiment can realize the position adjustment of the power head 4 on the driving rod 5 by arranging a plurality of loading positions 50 on the driving rod 5 and connecting the power head 4 to any loading position 50. The driving rod 5 can be driven to rotate and move downward without raising the power head 4 to the top of the column, thereby realizing the drilling process of the driving rod 5, which can effectively prevent the weight on the top of the column from being too heavy, reduce the risk of collapse of the pile driver, and prevent the driving rod 5 from being bent and broken during the drilling process; and the pile driver can use the rotary assembly 3 to rotate the upper column 2 after the driving rod 5 on one side of the lower guide rail 10 is drilled, so as to rotate the driving rod 5 on one side of the upper guide rail 20 to above the lower guide rail 10, and then drill the driving rod 5 above the lower guide rail 10 through the through guide rail in cooperation with the power head 4, thereby realizing the sequential docking and drilling of the driving rod 5, and the total length of the driving rod 5 after drilling can meet the piling depth without raising the column height, thereby preventing the problem of a high center of gravity of the pile driver.

[0069] It should also be noted that there is no limit to the number of driving rods 5 at the upper column 2 in the pile driver provided in this embodiment. Specifically, driving rods 5 may be provided on one side of multiple upper guide rails 20, or only on one side of some upper guide rails 20. The number of driving rods 5 at the upper column 2 is selected based on whether the total length of all the driving rods 5 at the upper and lower columns 1 connected can meet the designed pile length.

[0070] To facilitate grouting operations, Figure 1 As shown, the pile driver provided in this embodiment further includes a grouting device 6, and the grouting device 6 is detachably connected to the top end of the uppermost driving rod 5 on the through guide rail.

[0071] In order to facilitate the detachable connection between the grouting device 6 and the top end of the driving rod 5, a hollow joint can be provided below the grouting device 6 and at the top end of each driving rod 5, and the joint below the grouting device 6 is provided with a strip through-hole perpendicular to its axial direction, and the side wall of the joint at the top end of the driving rod 5 is provided with a groove; when the joint of the grouting device 6 is connected with the joint at the top end of the driving rod 5, the through-hole on the joint of the grouting device 6 and the groove on the joint at the top end of the driving rod 5 are connected with each other to form a connecting channel, and the pin shaft 81 is inserted in the above-mentioned connecting channel to limit the grouting device 6 and the driving rod 5 from being separated from each other along the axial direction of the joint (the axial direction of the joint is vertical when the driving rod 5 is erected).

[0072] Further, such as Fig.17 As shown, the circumferential side of the grouting device 6 may be connected to a telescopic driving device 80, the output end of which is connected to a pin shaft 81, and the telescopic driving device 80 is used to drive the pin shaft 81 to be inserted into the connecting channel or withdraw from the connecting channel during the telescopic process.

[0073] The telescopic driving device 80 may be a hydraulic cylinder, a pneumatic cylinder or the like.

[0074] It can be seen that the telescopic driving device 80 can realize automatic connection and automatic separation between the grouting device 6 and the driving rod 5, and construction workers do not need to manually connect or separate the grouting device 6 and the driving rod 5 at high altitude, thereby reducing the risk of high-altitude operations.

[0075] As for the docking process between the driving rods 5, since the docking operation of the driving rods 5 can be performed on the ground, in order to achieve the docking between the driving rods 5, as shown in FIG. Fig.18 As shown, a hollow male connector and a hollow female connector may be respectively provided at the top and bottom ends of the driving rod 5, and a groove may be provided on the peripheral side of the male connector, and a strip-shaped through hole perpendicular to the axial direction of the connector may be provided on the peripheral side of the female connector. When two adjacent driving rods 5 are docked, the female connector at the bottom end of the upper driving rod 5 is plugged and connected with the male connector at the top end of the next driving rod 5, and the groove on the male connector and the through hole on the female connector are docked to form a through hole. A pin 52 is inserted through the through hole to limit the separation of the two adjacent driving rods 5 along the axial direction of the connector.

[0076] It should be noted that, in order to simplify the joint structure of the driving rod 5, the joint at the top of the driving rod 5 can be set as a common joint that takes into account the grouting device 6 and other driving rods 5, so that the joint at the top of the driving rod 5 can be adapted to both the joint on the grouting device 6 and the bottom joints of the remaining driving rods 5.

[0077] like Figure 1 As shown, one of the multiple upper guide rails 20 is the main guide rail, and the other upper guide rails 20 are auxiliary guide rails, and each auxiliary guide rail is slidably connected to a driving rod 5; a plurality of lifting assemblies 7 are provided on the upper column 2, and the plurality of lifting assemblies 7 are arranged one by one corresponding to the plurality of upper guide rails 20, and the lifting assemblies 7 corresponding to the main rail are connected to the grouting device 6, and the lifting assemblies 7 corresponding to the auxiliary guide rails are connected to the driving rod 5 on the corresponding auxiliary guide rails.

[0078] The lifting assembly 7 connected to the grouting device 6 is used to drive the grouting device 6 to move up and down, and the lifting assembly 7 corresponding to the auxiliary guide rail is used to drive the driving rod 5 on the corresponding auxiliary guide rail to move up and down.

[0079] During use, the lifting assembly 7 can not only provide good support for the grouting device 6 and each driving rod 5, but also can replace manual labor to achieve the lifting and lowering of the grouting device 6 and each driving rod 5, thereby further improving the construction efficiency of the pile driver.

[0080] Among them, the lifting component 7 can adopt a telescopic drive device such as a telescopic oil cylinder, a gas cylinder, etc. Since the telescopic drive device will occupy a large amount of space on the side of the upper column 2, the lifting component 7 of this embodiment preferably adopts a winch mechanism.

[0081] like Figure 1 and Fig.17As shown, the lifting assemblies 7 and the grouting device 6 corresponding to the multiple auxiliary guide rails are provided with connectors 8. The connector 8 on the grouting device 6 is used for detachable connection with the top end of the uppermost driving rod 5 on the through guide rail, and the connector 8 on the lifting assemblies 7 corresponding to the auxiliary guide rails is used for detachable connection with the driving rod 5 on the corresponding auxiliary guide rails.

[0082] The connector 8 is used to further improve the construction efficiency of the pile driver, wherein the structure of the connector 8 on the grouting device 6 can be the telescopic drive device 80 with a pin 81 at the output end, or a clamping device such as an electric clamp or a clamping hoop. The structure of the connector 8 on the lifting assembly 7 can be the same as that of the connector 8 on the grouting device 6.

[0083] like Figure 1 As shown, a plurality of hanging arms 9 distributed in sequence along the circumference thereof are fixed to the top end of the upper column 2, the plurality of hanging arms 9 are distributed one by one above the plurality of upper guide rails 20, and the plurality of lifting assemblies 7 are installed one by one on the plurality of hanging arms 9.

[0084] The boom 9 can not only support the lifting assembly 7, but also allow the output end of the lifting assembly 7 to be spaced from the circumferential side wall of the upper column 2, so that when the grouting device 6 or the driving rod 5 below the boom 9 is driven by the slewing assembly 3 to rotate to above the power head 4, the central axis of the grouting device 6 or the driving rod 5 can be coaxial with the central axis of the power head 4, thereby improving the alignment accuracy between the grouting device 6 and the driving rod 5 connected to the power head 4, and improving the docking accuracy between the driving rod 5 and the power head 4.

[0085] like Figure 1 As shown, an upper protective tube 21 is provided at each secondary guide rail of the upper column 2, and the upper protective tube 21 is sleeved outside the driving rod 5 on the secondary guide rail at the position where the upper protective tube 21 is located.

[0086] The upper casing 21 can limit the driving rod 5 to prevent the driving rod 5 on the secondary guide rail from shaking left and right.

[0087] In order to prevent the upper casing 21 from generating friction during the movement of the driving rod 5 when the driving rod 5 is driven by the lifting assembly 7 or the power head 4 to separate from the upper casing 21 along its own axial direction, in this embodiment, preferably, there is a gap between the inner wall of the upper casing 21 and the outer wall of the driving rod 5 sleeved therein.

[0088] In addition, the upper casing 21 can be fixed on the auxiliary guide rail by welding, screw connection, etc.

[0089] like Figure 1 As shown, a plurality of lower trays 11 are disposed on the lower column 1, and the plurality of lower trays 11 are correspondingly located below the driving rods 5 on the plurality of secondary guide rails to support the driving rods 5 on the plurality of secondary guide rails.

[0090] The lower tray 11 can support the driving rod 5 on the secondary guide rail, thereby improving the stability of the driving rod 5 on the secondary guide rail.

[0091] In order to improve the use effect of the lower tray 11, the lower tray 11 can be in the shape of a groove with an opening facing the bottom. At this time, the space in the groove of the lower tray 11 is used to accommodate the bottom end of the driving rod 5 on the secondary guide rail, which can not only support the driving rod 5 on the secondary guide rail, but also limit the driving rod 5 on the secondary guide rail, further preventing the driving rod 5 on the secondary guide rail from shaking left and right.

[0092] like Figure 1 As shown, a lower casing 12 is provided at the lower guide rail 10 of the lower column 1, and the hollow part of the lower casing 12 is opposite to the output end of the power head 4. The lower casing 12 can be sleeved outside the driving rod 5 when the power head 4 drives the driving rod 5 connected thereto to slide on the lower guide rail 10.

[0093] The lower casing 12 can limit the driving rod 5 connected to the power head 4 to prevent the driving rod 5 connected to the power head 4 from shaking left and right, thereby effectively improving the stability of the driving rod 5 during the drilling process.

[0094] In summary, the pile driver provided in this embodiment can quickly connect each set of driving rods 5 and the driving rods 5 on one side of the lower guide rail 10 by arranging multiple sets of upper guide rails 20 and driving rods 5 on the circumference of the upper column 2, and realizing the rotation function of the upper column 2 through the slewing assembly 3, so that the total length of the drill rod 51 drilled into the soil exceeds the total length of the upper and lower columns 1, which can meet the requirements of the designed pile length. And because each driving rod 5 in the pile driver provided in this embodiment is provided with multiple loading positions 50, the position of the power head 4 on the driving rod 5 is adjustable, and the power head 4 can drive the driving rod 5 to rotate and move downward without being raised to the top of the upper column 2, thereby realizing the drilling process of the driving rod 5. Compared with the prior art, the pile driver provided in this embodiment can greatly reduce the weight of the top of the upper column 2, and provide a fulcrum for the power head 4 in the middle of the slender rod 5, effectively overcoming the disadvantage that the driving rod 5 is easy to break due to large bending moment.

[0095] It should be noted that, compared with the existing patent CN208950504U, the pile driver provided in this embodiment has a simple structure and low cost. Compared with the weight of the top of the column in the existing patent being 40 to 60 tons, the top weight of the upper column 2 in the pile driver provided in this embodiment is not more than 4 tons. Accordingly, the adverse effects such as centrifugal force in the pile driver provided in this embodiment are also greatly reduced. When the upper column 2 rotates, it is almost not affected by the bending moment due to its small weight.

[0096] Compared with the existing patent CN204212716U, the pile driver provided by this embodiment has rapid movement and low cost, and solves the problem that the power head 4 needs to rise to the top of the column.

[0097] Compared with the existing patent CN113790033A, the pile driver provided in this embodiment has a simple structure, and compared with the method of hoisting the driving rod 5 in the above-mentioned existing patent, this embodiment uses the rotary assembly 3 to drive the upper column 2 to rotate around its axis to achieve the docking of the driving rod 5, which saves time and effort, has higher accuracy, and completely solves the problem that the power head 4 needs to be lifted to the top of the column.

[0098] Compared with the existing patent CN212296220U, the pile driver provided in this embodiment can effectively reduce the height of the pile driver column under the premise of constructing the same pile length. Under the premise of the same column height, the pile driver provided in this embodiment can construct a pile foundation of more than twice the length compared with the above-mentioned existing patent.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A pile driver, characterized in that: It comprises a lower column (1), an upper column (2), a rotary assembly (3) and a power head (4); The lower column (1) is provided with a lower guide rail (10) extending along its axial direction, and the upper column (2) is provided with a plurality of upper guide rails (20) extending along its axial direction, and the plurality of upper guide rails (20) are distributed in sequence along the circumference of the upper column (2); The upper column (2) is rotatably mounted above the lower column (1), the rotary assembly (3) is connected to the upper column (2), and the rotary assembly (3) is used to drive the upper column (2) to rotate, so that one of the multiple upper guide rails (20) on the upper column (2) is selectively connected to the lower guide rail (10) to form a through guide rail; A driving rod (5) is provided on one side of the lower guide rail (10) and at least one of the upper guide rails (20), and after the upper guide rail (20) is docked with the lower guide rail (10) to form the through guide rail, the driving rod (5) on one side of the upper guide rail (20) can slide downward and dock with the driving rod (5) on one side of the lower guide rail (10); Each of the driving rods (5) is provided with a plurality of loading positions (50) sequentially distributed along its axial direction. The power head (4) is slidably connected to the through guide rail. The power head (4) can move relative to the driving rod (5) on the through guide rail and be connected to any of the loading positions (50) on the driving rod (5). The power head (4) is used to drive the driving rod (5) to rotate and slide on the through guide rail after being connected to the loading position (50) of the driving rod (5).

2. The pile driver according to claim 1, characterized in that: It also comprises a grouting device (6), wherein the grouting device (6) is detachably connected to the top end of the uppermost driving rod (5) on the through rail.

3. The pile driver according to claim 2, characterized in that: One of the plurality of upper guide rails (20) is a main guide rail, and the remaining upper guide rails (20) are auxiliary guide rails, and each of the auxiliary guide rails is slidably connected to a driving rod (5); The upper column (2) is provided with a plurality of lifting assemblies (7), and the plurality of lifting assemblies (7) are arranged in one-to-one correspondence with the plurality of upper guide rails (20), and the lifting assemblies (7) arranged corresponding to the main guide rails are connected to the grouting device (6), and the lifting assemblies (7) arranged corresponding to the auxiliary guide rails are connected to the driving rods (5) on the corresponding auxiliary guide rails.

4. The pile driver according to claim 3, characterized in that: The lifting assemblies (7) corresponding to the plurality of auxiliary guide rails and the grouting device (6) are both provided with connectors (8); the connector (8) on the grouting device (6) is used for detachably connecting with the top end of the uppermost driving rod (5) on the through guide rail; the connector (8) on the lifting assemblies (7) corresponding to the auxiliary guide rails is used for detachably connecting with the driving rod (5) on the auxiliary guide rails corresponding thereto.

5. The pile driver according to claim 4, characterized in that: The top end of each driving rod (5) is provided with a joint for connecting to the connector (8), and the side wall of the joint at the top end of the driving rod (5) is provided with a groove; The connector (8) comprises a telescopic drive device (80) and a pin shaft (81) arranged at the output end of the telescopic drive device (80); the pin shaft (81) is used to move in and out of the groove along an axial direction perpendicular to the drive rod (5) below the connector (8) under the drive of the telescopic drive device (80), so as to connect or separate the drive rod (5) and the connector (8).

6. The pile driver according to claim 3, characterized in that: A plurality of suspension arms (9) are fixed to the top of the upper column (2) and are distributed in sequence along its circumference. The plurality of suspension arms (9) are distributed one-to-one above the plurality of upper guide rails (20), and the plurality of lifting assemblies (7) are installed one-to-one on the plurality of suspension arms (9).

7. The pile driver according to claim 3, characterized in that: An upper protective tube (21) is provided at each of the secondary guide rails of the upper column (2), and the upper protective tube (21) is sleeved outside the driving rod (5) on the secondary guide rail at the position where the upper protective tube (21) is located.

8. The pile driver according to claim 3, characterized in that: A plurality of lower trays (11) are provided on the lower column (1), and the plurality of lower trays (11) are located one by one below the driving rods (5) on the plurality of secondary guide rails to support the driving rods (5) on the plurality of secondary guide rails.

9. The pile driver according to claim 8, characterized in that: The lower tray (11) is in the shape of a groove, and the space in the groove of the lower tray (11) is used to accommodate the bottom end of the driving rod (5) on the secondary guide rail.

10. The pile driver according to any one of claims 1 to 9, characterized in that: A lower protective tube (12) is provided at the lower guide rail (10) of the lower column (1), and the hollow part of the lower protective tube (12) is opposite to the output end position of the power head (4). The lower protective tube (12) can be sleeved outside the driving rod (5) when the power head (4) drives the driving rod (5) connected thereto to slide on the lower guide rail (10).

Images