Screwing construction device for screw anchor foundations

Abstract

The present application relates to the technical field of engineering construction equipment, and discloses a screwing construction device of a screw anchor foundation, which comprises a motor, the output end of the motor is fixed with a support assembly through a detachable end cover, a buffer limiting assembly is arranged at the opening in the middle of the inner side of the frame, a driving support is centrally arranged in the support assembly, and a screw anchor assembly extending out of the support assembly is connected to the bottom of the driving support; the present application improves the construction capacity of large screw anchors and hard soil layers: through the composite power mode of the motor main torque and the electromagnetic reciprocating torque superposition, the torque output efficiency is greatly improved, and large screw anchors with a diameter of more than 1m, dense clay layers, gravel layers and other complex geologies can be coped with; the construction economy and environmental protection are optimized: without using the combined mode of multiple small-size screw anchors matched with the pile cap, the earth excavation, material consumption and welding process are reduced, the damage to the water and soil environment is reduced, the fatigue failure risk of the welding node is avoided, the labor cost is saved, and the construction efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of engineering construction equipment technology, specifically to a screwing construction device for a spiral anchor foundation. Background Technology

[0002] Helical anchor foundations are a widely used type of foundation in engineering structures. Due to their unique construction and superior load-bearing performance, they have received increasing attention and application in the engineering field in recent years. Initially, helical anchor foundations were mainly used in the foundations of power line towers and communication towers. They work by rotating helical blades deep into the soil, generating enormous tensile and lateral load-bearing forces. With technological advancements, the application of helical anchors has gradually expanded to multiple fields such as construction, bridges, and marine engineering.

[0003] However, helical anchor foundations still face some challenges in practical applications. In the future, with in-depth research and technological advancements, helical anchor foundations are expected to be more widely used in more fields.

[0004] Current construction technology process:

[0005] The construction of helical anchor foundations requires specialized screwing equipment, typically hydraulically or electrically driven torque devices. At the construction site, the helical anchor is aligned with the designed position. The construction equipment then rotates the helical anchor, using its helical blades like a screw to gradually screw it into the soil until the designed depth is reached.

[0006] Current technological shortcomings:

[0007] Construction of large spiral anchors or in hard soil layers is difficult:

[0008] The load-bearing capacity of a single helical anchor is positively correlated with the diameter of the anchor plate and the size of the anchor rod. However, existing equipment mostly relies on a single hydraulic or electric torque output. When facing large helical anchors with a diameter of more than 1m or dense clay or gravel layers, the required twisting torque increases sharply (often exceeding the rated output of traditional equipment), leading to drilling jams, equipment overload, or even damage. It is difficult to achieve a single-anchor structure for high-voltage transmission towers with "one pile and one leg".

[0009] Limitations of multi-anchor combination construction:

[0010] To meet high load-bearing capacity requirements, existing projects often use multiple small-sized helical anchors paired with reinforced concrete or steel foundations. This not only requires excavation (damaging the soil and water environment) but also necessitates bolting or welding to fix the foundation, increasing material consumption, labor costs, and the risk of fatigue failure (welded joints are prone to becoming weak points). Therefore, we have introduced a helical anchor foundation tightening device. Summary of the Invention

[0011] The purpose of this invention is to provide a screwing construction device for helical anchor foundations to solve the problems mentioned in the background art.

[0012] To achieve the above objectives, the present invention provides the following technical solution: a screwing construction device for a spiral anchor foundation, comprising a motor, wherein the output end of the motor is fixed with a support assembly via a detachable end cover;

[0013] The support assembly has several sets of frames evenly spaced on the inner side of the support body. Arc-shaped limiting cylinders are symmetrically fixed on both sides of the inner wall of the frame, and coils are provided inside the arc-shaped limiting cylinders.

[0014] A buffer limiting component is provided at the opening in the middle of the inner side of the frame;

[0015] An actuating bracket is centrally located inside the support assembly, and a spiral anchor assembly extending out of the support assembly is connected to the bottom of the actuating bracket.

[0016] The extension arm at the outer end of the actuation bracket is fixed with a permanent magnet, and the two ends of the permanent magnet extend into the corresponding coil.

[0017] When the motor is working, it transmits torque to the spiral anchor assembly through the detachable end cover, support assembly and actuating bracket;

[0018] When the permanent magnet is energized, it generates a reciprocating electromagnetic force, which in turn transmits the reciprocating torque to the helical anchor assembly through the actuation bracket. At the same time, the buffer and limit assembly buffers the reciprocating rotation of the actuation bracket and dissipates heat from the coil.

[0019] Preferably, the lower end of the motor shaft at the motor output end is fixed with a plug-in post, and the plug-in post has a snap-fit ​​protrusion on its side;

[0020] The detachable end cap includes a sealing cap fixed to the top of the support body by bolts and a connecting cylinder fixed to the middle of the upper end of the sealing cap.

[0021] The side of the central hole on the lower side of the inner cavity of the connecting cylinder is provided with a snap-fit ​​groove;

[0022] The plug is inserted into the center hole, and the snap-fit ​​protrusion is engaged in the corresponding snap-fit ​​groove;

[0023] The upper part of the connecting cylinder is fixedly connected to the motor shaft by two sets of cross-shaped plug rods.

[0024] Preferably, the frame is fixed in the inner groove at the upper end of the support body, the flange at the end of the arc-shaped limiting cylinder is fixed to the inner wall of the frame with screws, and the side of the support body is provided with a heat dissipation groove that communicates with the inside of the frame.

[0025] Preferably, the opening in the middle of the inner side of the frame is provided with symmetrical limiting ear plates on both sides, which are connected to the frame;

[0026] The buffer limiting assembly includes an air cylinder fixed through the limiting ear plate, a piston and a return spring disposed inside the air cylinder, and a stop post fixed in the middle of the piston.

[0027] The abutment post extends from the inner end of the air cylinder and contacts the side of the extension arm. The air pipe at the outer end of the air cylinder passes through the frame and connects to the corresponding arc-shaped limiting cylinder.

[0028] Preferably, the extension arms are evenly spaced on the side of the intermediate plate, and the side of the intermediate plate is also provided with two sets of upper and lower support wheels located between adjacent extension arms. The two sets of upper and lower support wheels are supported between the detachable end cap and the support body.

[0029] Preferably, the spiral anchor assembly includes a rotating column fixed at the lower center of the intermediate plate, a rotating rod fixed at the lower center of the rotating column, and a spiral anchor plate disposed on the rotating rod.

[0030] Preferably, a limiting ring is provided in the middle of the inner groove, and a bearing sleeved on the rotating column is provided in the limiting ring.

[0031] Compared with existing technologies, the beneficial effects of this invention are: Enhanced construction capabilities for large spiral anchors and hard soil layers: Through a composite power mode combining the main torque of the motor and the reciprocating torque of the electromagnetic system, the torque output efficiency is significantly improved. This enables the construction of large spiral anchors with diameters exceeding 1m and complex geological conditions such as dense clay layers and gravel layers, achieving a single-anchor structure for high-voltage transmission towers with "one pile, one leg," breaking through the construction bottlenecks of traditional equipment. Enhanced power transmission reliability: The triple-fixed structure of "plug-in column + snap-fit ​​groove + plug-in rod" connects the motor and the support, ensuring the rigidity of torque transmission, preventing slippage, and solving the problem of easy loosening in traditional bolt connections, reducing component wear and lowering maintenance costs.

[0032] Achieving integrated drag reduction and buffering / heat dissipation: Utilizing the high-frequency reciprocating torque generated by electromagnetic drive to simulate high-frequency vibration effects, the frictional resistance between the soil and the anchor plate is reduced, especially improving the "anchor-clamping" phenomenon in cohesive soils. The buffering and limiting component absorbs impact energy through an air cylinder, piston, and return spring, reducing equipment fatigue damage. Simultaneously, airflow circulation dissipates heat from the coil, preventing overheating and failure of electromagnetic components under high-frequency vibration. Optimizing construction economy and environmental friendliness: Eliminating the need for multiple small-sized helical anchors combined with a foundation reduces earthwork excavation, material usage, and welding processes, minimizing damage to the soil and water environment. It also avoids the risk of fatigue failure at welded joints, saving labor costs and improving construction efficiency. Attached Figure Description

[0033] Figure 1 This is an exploded structural diagram of the overall assembly of the present invention;

[0034] Figure 2 This is an exploded structural diagram of the assembly of the motor shaft and the detachable end cover of the present invention;

[0035] Figure 3 This is a schematic diagram of the detachable end cap of the present invention;

[0036] Figure 4 This is a schematic diagram of the support assembly of the present invention;

[0037] Figure 5 This is a cross-sectional view of the buffer limiting component of the present invention;

[0038] Figure 6 This is a schematic diagram of the connection between the actuating bracket and the spiral anchor of the present invention;

[0039] Figure 7 This is a schematic diagram of the assembly of the support component and the actuating bracket of the present invention;

[0040] Figure 8 For the present invention Figure 7 A schematic diagram of the cross-sectional structure;

[0041] Figure 9 This is a three-dimensional structural diagram of the overall assembly of the present invention.

[0042] In the picture:

[0043] 1. Motor; 101. Motor shaft; 102. Connecting post; 103. Snap-fit ​​protrusion;

[0044] 2. Removable end cap; 201. Sealing cap; 202. Bolt; 203. Connecting cylinder; 204. Center hole; 205. Snap-fit ​​groove;

[0045] 3. Support assembly; 301. Support body; 302. Heat dissipation groove; 303. Arc-shaped limiting cylinder; 304. Coil; 305. Limiting ear plate; 306. Inner groove; 307. Air cylinder; 308. Frame; 309. Limiting ring; 310. Bearing; 311. Air pipe; 312. Flange; 313. Return spring; 314. Abutment post; 315. Piston;

[0046] 4. Actuating bracket; 401. Intermediate plate; 402. Extension arm; 403. Permanent magnet; 404. Support wheel;

[0047] 5. Rotating rod; 501. Spiral anchor plate; 502. Rotating column;

[0048] 6. Connector rod. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Example:

[0051] Please see Figure 1-9 The present invention provides a technical solution:

[0052] A screwing construction device for a spiral anchor foundation includes a motor 1, and a support assembly 3 is fixed to the output end of the motor 1 through a detachable end cover 2.

[0053] A plug-in post 102 is fixed at the lower end of the motor shaft 101 at the output end of motor 1, and a snap-fit ​​protrusion 103 is provided on the side of the plug-in post 102;

[0054] The detachable end cap 2 includes a sealing cap 201 fixed to the top of the support body 301 by bolts 202 and a connecting cylinder 203 fixed to the middle of the upper end of the sealing cap 201;

[0055] A snap-fit ​​groove 205 is provided on the side of the center hole 204 on the lower side inside the connecting cylinder 203;

[0056] The plug post 102 is inserted into the center hole 204, and the snap-fit ​​protrusion 103 is engaged in the corresponding snap-fit ​​groove 205;

[0057] The upper part of the connecting cylinder 203 is fixedly connected to the motor shaft 101 by two sets of cross-shaped plug rods 6.

[0058] Connection between detachable end cap 2 and motor 1:

[0059] The triple fixing structure of "plug post 102 + snap-fit ​​groove 205 + plug rod 6" ensures the rigidity of torque transmission (avoiding slippage) and facilitates disassembly and maintenance, solving the problem of easy loosening of traditional bolt connections.

[0060] The support body 301 of the support assembly 3 has several sets of frames 308 evenly spaced on the inner side. The inner walls of the frames 308 are symmetrically fixed with arc-shaped limiting cylinders 303, and the arc-shaped limiting cylinders 303 are provided with coils 304 inside.

[0061] The connection between coil 304 and permanent magnet 403:

[0062] The permanent magnet 403 has both ends inserted into the arc-shaped limiting cylinder 303, and the coil 304 is distributed along the arc: so that the electromagnetic force is always perpendicular to the axis of the permanent magnet, maximizing the torque output.

[0063] A buffer limiting component is provided at the opening in the middle of the inner side of frame 308;

[0064] The frame 308 is fixed in the inner groove 306 at the upper end of the support body 301;

[0065] Multiple sets of frames 308 are evenly distributed in the inner groove 306, corresponding to multiple extension arms 402 of the actuation bracket 4: forming a uniform circumferential electromagnetic force to prevent the actuation bracket 4 from swaying due to uneven force.

[0066] The flange 312 at the end of the arc-shaped limiting cylinder 303 is fixed to the inner wall of the frame 308 with screws. The arc-shaped limiting cylinder 303 is fixed by the flange 312 to prevent the coil from loosening due to vibration.

[0067] The support body 301 has a heat dissipation groove 302 on its side that connects to the inside of the frame 308.

[0068] The opening in the middle of the inner side of the frame 308 is symmetrically provided with limiting ear plates 305 connected to the frame 308 on both sides.

[0069] The buffer limiting assembly includes an air cylinder 307 fixed through the limiting ear plate 305, a piston 315 and a return spring 313 disposed inside the air cylinder 307, and an abutment post 314 fixed in the middle of the piston 315.

[0070] The abutment post 314 extends through the inner end of the air cylinder 307 and contacts the side of the extension arm 402. The air pipe 311 at the outer end of the air cylinder 307 passes through the frame 308 and connects with the corresponding arc-shaped limiting cylinder 303.

[0071] The buffer limiting assembly is a combination of "air cylinder 307 + piston 315 + return spring 313": the return spring 313 can absorb the impact energy when the actuating bracket 4 rotates through the extension arm 402, and the return spring 313 quickly rebounds to reset the abutment column 314, avoiding direct collision between the extension arm 402 and the frame 308, thus extending the equipment life.

[0072] The air tube 311 connects the air cylinder 307 to the arc-shaped limiting cylinder 303: the airflow generated during the buffering process directly acts on the coil 304, and the heat dissipation efficiency is improved compared with traditional natural heat dissipation.

[0073] The support assembly 3 has an actuating bracket 4 centrally located inside;

[0074] A permanent magnet 403 is fixed to the extension arm 402 at the outer end of the actuation bracket 4, and the two ends of the permanent magnet 403 extend into the corresponding coil 304.

[0075] The extension arms 402 are evenly spaced on the side of the intermediate plate 401, and the side of the intermediate plate 401 is also provided with two sets of upper and lower support wheels 404 located between adjacent extension arms 402.

[0076] The upper and lower sets of support wheels 404 are supported between the detachable end cover 2 and the support body 301. That is, the upper support wheel 404 is in contact with the bottom of the sealing cover 201, and the lower support wheel 404 is in contact with the bottom of the inner groove 306.

[0077] The upper and lower sets of support wheels 404 contact the sealing cover 201 and the inner groove 306 respectively: they not only bear the radial load of the actuating bracket 4 (reducing the force on the bearing 310), but also convert sliding friction into rolling friction, reducing motion resistance.

[0078] The bottom of the actuation bracket 4 is connected to a spiral anchor assembly that extends out of the support assembly 3;

[0079] The spiral anchor assembly includes a rotating column 502 fixed at the lower center of the intermediate plate 401, a rotating rod 5 fixed at the lower center of the rotating column 502, and a spiral anchor piece 501 disposed on the rotating rod 5.

[0080] A limiting ring 309 is provided in the middle of the inner groove 306, and a bearing 310 is provided in the limiting ring 309 and sleeved on the rotating column 502.

[0081] Connection between the actuating bracket 4 and the helical anchor assembly:

[0082] The intermediate disk 401 and the rotating column 502 are integrated into one design, and with the bearing 310 in the limiting ring 309: the axial displacement of the rotating column 502 is limited by the bearing 310, the radial rotation resistance is reduced by 60%, and the torque is efficiently transmitted to the spiral anchor plate 501.

[0083] When the motor 1 is working, it transmits torque to the spiral anchor assembly through the detachable end cover 2, the support assembly 3 and the actuating bracket 4;

[0084] When the permanent magnet 403 is energized, a reciprocating electromagnetic force is generated on the permanent magnet 403, thereby transmitting the reciprocating torque to the helical anchor assembly through the actuation bracket 4. At the same time, the buffer limit assembly plays a buffering role when the actuation bracket 4 reciprocates and rotates, and realizes heat dissipation of the coil 304.

[0085] High-frequency vibration pile driving technology is a commonly used pile foundation construction method, but it is mostly used on pipe piles. No corresponding technology has been developed for helical anchor foundations, but the technical principles of it on pipe piles can be applied to the vibration installation of helical anchors.

[0086] High-frequency vibratory pile driving utilizes high-frequency vibration to reduce the frictional resistance of the soil surrounding the pile, allowing the pile to be driven into or pulled out of the soil quickly and effectively. This technology is particularly suitable for sandy soil, but less effective in clay soil. A hydraulically driven vibratory hammer generates high-frequency vibrations, transmitting the vibrational force to the pile. This high-frequency vibration alters the soil structure around the pile, reducing its strength and potentially causing liquefaction, thus decreasing the frictional resistance between the pile and the soil.

[0087] Specifically, when using it:

[0088] This invention employs a loading method that combines torque tightening with high-frequency vibration torque tightening:

[0089] Main torque transmission (motor drive):

[0090] After the motor 1 starts, the motor shaft 101 transmits torque to the support assembly 3 through the detachable end cover 2: the plug post 102 at the lower end of the motor shaft 101 is inserted into the center hole 204 of the connecting cylinder 203, the snap protrusion 103 and the snap groove 205 engage to achieve initial fixation, and then the cross-shaped plug rods 6 are used to further lock it to ensure that the torque is transmitted without loss.

[0091] The sealing cover 201 of the detachable end cover 2 is fixed to the support body 301 by bolts 202, so that the torque is transmitted to the intermediate plate 401 of the actuating bracket 4 in sequence, and finally drives the rotating column 502, the rotating rod 5 and the spiral anchor plate 501 to rotate, thus completing the drilling action of the spiral anchor.

[0092] Auxiliary reciprocating torque (electromagnetic drive):

[0093] When the coil 304 is energized, it generates an electromagnetic force with the permanent magnet 403 of the actuating bracket 4: by alternating the direction of the coil current, the permanent magnet 403 is made to swing back and forth in the arc-shaped limiting cylinder 303, which drives the actuating bracket 4 to generate a periodic reciprocating torque (superimposed on the main torque of the motor), enhancing the "impact-twisting" effect of the spiral anchor assembly on hard soil and reducing drilling resistance.

[0094] Buffering and limiting:

[0095] When the extension arm 402 of the actuator bracket 4 swings back and forth, the abutment column 314 is squeezed and pushed by the piston 315 to compress the air in the air cylinder 307 and the return spring 313, and the spring force of the return spring 313 is used to buffer the impact.

[0096] The support wheel 404 rolls between the sealing cover 201 and the inner groove 306, limiting the radial displacement of the actuating bracket 4 and ensuring stable reciprocating motion.

[0097] Heat dissipation cycle:

[0098] When the buffer limiting component is working, the compressed air in the air cylinder 307 enters the arc-shaped limiting cylinder 303 through the air pipe 311, carrying away the heat generated by the coil 304.

[0099] Hot air flows through the inside of the frame 308 to the heat dissipation slots 302 of the support body 301, and is finally discharged outside the equipment, forming a "buffering-heat dissipation" linkage cycle.

[0100] The top of the helical anchor assembly is connected to motor 1 and high-frequency vibration assembly (i.e., support assembly 3 and actuating bracket 4). The upper motor 1 is a torque motor, and the torque is applied in a unidirectional direction, which is the turning direction of the helical anchor assembly. The torque is applied in a bidirectional direction by the lower high-frequency vibration assembly, causing the helical anchor assembly to perform reciprocating cyclic vibration.

[0101] During construction, as the twisting depth increases and the helical anchor assembly is driven into the soil, the soil's resistance torque on the helical anchor assembly gradually increases. The torque provided by the twisting motor is used to overcome the soil's resistance torque on the helical anchor assembly.

[0102] The function of the high-frequency vibration component is to drive the spiral anchor component to generate rotational vibration around its axis. The rotation of the spiral anchor component will cause the soil around the spiral anchor component to vibrate. When the vibration reaches a certain frequency, it will reduce the frictional resistance between the soil and the rotating rod 5 and the spiral anchor plate 501, reduce the resistance torque of the soil on the entire spiral anchor component, and make the tightening process easier.

[0103] The support body 301 is connected to the output shaft of the upper screw motor, and the actuation bracket 4 is connected to the spiral anchor assembly at the center, transmitting vibration and torque to the spiral anchor assembly.

[0104] The actuation bracket 4 has high rigidity. The outer end of the extension arm 402 is equipped with a permanent magnet 403. A coil 304 is arranged around the permanent magnet 403, so that the permanent magnet 403 and the actuation bracket 4 connected thereto can perform a certain amplitude of reciprocating linear motion in the horizontal direction. The amplitude and frequency of its reciprocating motion are adjusted by the electronic control system to achieve the magnitude and direction of the current through the coil 304.

[0105] The reciprocating torque excitation received by the actuating bracket 4 will be transmitted to the helical anchor assembly connected to it.

[0106] Due to the need for vibration transmission and the formation of significant vibration damping in the soil, the helical anchor assembly requires greater rigidity, which means a larger anchor wall thickness and anchor plate thickness.

[0107] Under the action of high-frequency vibration, for the same size of helical anchor assembly, the torque required by the vibration tightening method is less than that of the ordinary tightening method; under the condition of applying the same torque, the size of the helical anchor assembly that can be tightened by the vibration tightening method is larger than that of the ordinary tightening method, that is, a larger diameter of the helical anchor plate 501, a larger number of helical anchor plates 501, and a larger diameter of the rotating rod 5.

[0108] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screwing construction device for a helical anchor foundation, comprising a motor, characterized in that: The motor output end is fixed with a support assembly via a detachable end cover; The support assembly has several sets of frames evenly spaced inside the support body. Arc-shaped limiting cylinders are symmetrically fixed on both sides of the inner wall of the frame, and coils are provided inside the arc-shaped limiting cylinders. A buffer limiting component is provided at the opening in the middle of the inner side of the frame; An actuating bracket is centrally located inside the support assembly, and a spiral anchor assembly extending out of the support assembly is connected to the bottom of the actuating bracket. The extension arm at the outer end of the actuation bracket is fixed with a permanent magnet, and the two ends of the permanent magnet extend into the corresponding coil. When the motor is working, it transmits torque to the spiral anchor assembly through the detachable end cover, support assembly and actuating bracket; When the permanent magnet is energized, it generates a reciprocating electromagnetic force, which in turn transmits the reciprocating torque to the helical anchor assembly through the actuation bracket. At the same time, the buffer and limit assembly buffers the reciprocating rotation of the actuation bracket and dissipates heat from the coil.

2. The screwing construction device for a spiral anchor foundation according to claim 1, characterized in that: The lower end of the motor shaft at the motor output end is fixed with a plug-in post, and the side of the plug-in post is provided with a snap-fit ​​protrusion. The detachable end cap includes a sealing cap fixed to the top of the support body by bolts and a connecting cylinder fixed to the middle of the upper end of the sealing cap; The side of the central hole on the lower side of the inner side of the connecting cylinder is provided with a snap-fit ​​groove; The plug is inserted into the center hole, and the snap-fit ​​protrusion is engaged in the corresponding snap-fit ​​groove; The upper part of the connecting cylinder is fixedly connected to the motor shaft by two sets of cross-shaped plug rods.

3. The screwing construction device for a spiral anchor foundation according to claim 1, characterized in that: The frame is fixed in the inner groove at the upper end of the support body, and the flange at the end of the arc-shaped limiting cylinder is fixed to the inner wall of the frame with screws. The side of the support body is provided with a heat dissipation groove that communicates with the inside of the frame.

4. The screwing construction device for a spiral anchor foundation according to claim 1, characterized in that: The opening in the middle of the inner side of the frame is symmetrically provided with limiting ear plates on both sides, which are connected to the frame. The buffer limiting assembly includes an air cylinder fixed through the limiting ear plate, a piston and a return spring disposed inside the air cylinder, and a stop post fixed in the middle of the piston. The abutment post extends from the inner end of the air cylinder and contacts the side of the extension arm. The air pipe at the outer end of the air cylinder passes through the frame and connects to the corresponding arc-shaped limiting cylinder.

5. The screwing construction device for a spiral anchor foundation according to claim 3, characterized in that: The extension arms are evenly spaced on the side of the middle plate. The side of the middle plate is also provided with two sets of upper and lower support wheels located between adjacent extension arms. The two sets of upper and lower support wheels are supported between the detachable end cap and the support body.

6. The screwing construction device for a spiral anchor foundation according to claim 5, characterized in that: The spiral anchor assembly includes a rotating column fixed at the lower center of the intermediate plate, a rotating rod fixed at the lower center of the rotating column, and a spiral anchor plate disposed on the rotating rod.

7. The screwing construction device for a spiral anchor foundation according to claim 6, characterized in that: A limiting ring is provided in the middle of the inner groove, and a bearing sleeved on the rotating column is provided in the limiting ring.

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