High-strength fastener for building construction concrete reinforced pipe pile based on special steel and fastening method of high-strength fastener

Abstract

The invention relates to the technical field of fastening of concrete reinforced pipe piles, in particular to a high-strength fastener for a building construction concrete reinforced pipe pile based on special steel and a fastening method of the high-strength fastener. Comprising a fixed mold, a plurality of dynamic fastening devices regularly arranged on the two sides of the fixed mold and a static fastening device arranged above the dynamic fastening devices. According to the high-strength fastener for the building construction concrete reinforced pipe pile based on the special steel and the fastening method of the high-strength fastener, when a shaft end screw rod is twisted to drive a rotating shaft to rotate, a plurality of rotating parts on the two sides of an upper mold can be driven to rotate through a plurality of worms, and a plurality of threaded rods are fixed in a fixed block body at the same time; and the labor intensity of workers is reduced, and the time for fastening the concrete reinforced pipe pile is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of fastening concrete steel bar pipe piles, in particular to a high-strength fastener for building construction concrete steel bar pipe piles based on special steel and a fastening method thereof. Background Art

[0002] High-strength fasteners for concrete reinforced pipe piles in construction based on special steel are mainly used to fix the mold to ensure the stability and accuracy of concrete reinforced pipe piles during the molding process. They not only improve the stability and service life of the mold, but also ensure the molding quality of the pipe piles. They are an indispensable and important component in modern building construction.

[0003] The patent with application number CN202122254225.8 discloses a fastener, including a support frame, a rotating shaft unit partially arranged in the support frame, including a first body, on which a through hole, a waist-shaped portion extending along a first direction and an axial end locking fastener abutting the bottom of the waist-shaped portion are sequentially formed, the through hole and the axial end locking fastener are respectively arranged at both ends of the first body, the waist-shaped portion includes a second body, and an inclined cone surface is arranged at both ends thereof and extends relative to the first body. The rotating shaft unit is integrally formed by die casting, powder metallurgy or forging, which greatly reduces the production cost, simplifies the manufacturing process, improves production efficiency while reducing labor costs, and can be put into large-scale production to increase the company's profitability.

[0004] In the process of using traditional fasteners, workers need to use electric wrench devices to tighten multiple groups of bolts between the lower mold and the upper mold in sequence to achieve a stable connection of the overall mold. However, during the subsequent mold height adjustment or rotation process, these bolts serving as fasteners are often prone to gradually loosening due to vibration. This loosening phenomenon may not only affect the stability and precision of the mold, but may also have an adverse effect on the molding quality of concrete reinforced pipe piles.

[0005] In view of this, we propose a high-strength fastener and a fastening method for concrete reinforced pipe piles in building construction based on special steel. Summary of the invention

[0006] The object of the present invention is to provide a high-strength fastener for building construction concrete reinforced pipe piles based on special steel and a fastening method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, on the one hand, the present invention provides the following technical solutions:

[0008] A high-strength fastener for building construction concrete reinforced pipe piles based on special steel, comprising a fixed mold, a plurality of dynamic fastening devices regularly arranged on both sides of the fixed mold, and a static fastening device arranged above the dynamic fastening device;

[0009] The dynamic fastening device comprises a fixed block and an inserting part arranged inside the fixed block;

[0010] The inserting part includes a rotating rod, a group of toggle brackets symmetrically arranged outside the rotating rod, a moving block that moves with the end of the toggle bracket, a moving inserting rod arranged on the top surface of the moving block, a moving horizontal plate that moves with the end of the toggle bracket, an expansion plug arranged at the center position of the top surface of the moving horizontal plate, a traction ball arranged on the top surface of the expansion plug, and a connecting rope connected between the traction ball and the expansion plug;

[0011] The static fastening device comprises a rotating shaft, a plurality of worms regularly distributed outside the rotating shaft, and a rotating part that cooperates with the worms to move;

[0012] The rotating part includes a rotating cylinder, a worm gear driving the rotating cylinder to rotate, a tightening part arranged inside the rotating cylinder, and a pressure spring sleeved outside the tightening part;

[0013] The tightening part comprises a sliding disk, a disk body protruding rod arranged on the outer side wall of the sliding disk, and a threaded rod arranged on the bottom surface of the sliding disk.

[0014] In the technical solution of the present invention, the fixed mold includes an upper mold and a lower mold that are symmetrically arranged up and down, a fixed horizontal plate welded and fixed to the outer walls of the left and right ends of the upper mold, and a fixed cover body fixedly connected to the outer wall of the upper mold by bolts, and a plurality of regularly distributed circular holes that pass through the top surface of the fixed horizontal plate are provided.

[0015] In the technical solution of the present invention, the fixed block is welded and fixed on the outer wall of the lower mold, a placement groove is opened inside the fixed block, a sliding through hole is opened at the center position of the top surface of the fixed block, and threaded grooves connected to the placement groove are opened on both sides of the sliding through hole on the top surface of the fixed block.

[0016] In the technical solution of the present invention, the two ends of the rotating rod are rotatably connected to the groove wall of the placement groove, the toggle bracket is clamped and fixed to the rotating rod, and the interior of the moving block is provided with a block through groove that runs through the left and right and is used to provide a moving range for the toggle rod at the end of the toggle bracket.

[0017] In the technical solution of the present invention, the movable plug rod is welded and fixed on the top surface of the movable block, and the movable plug rod is slidably connected to the inside of the threaded groove. Both ends of the movable cross plate are provided with plate edge through grooves for providing a moving range for the lever at the end of the movable bracket.

[0018] In the technical solution of the present invention, the expansion plug is welded and fixed on the top surface of the movable horizontal plate, a circular hole connected to the top surface of the expansion plug is opened inside the expansion plug, and the upper and lower ends of the connecting rope are respectively adhered and fixed to the wall of the circular hole of the expansion plug and the traction ball.

[0019] In the technical solution of the present invention, the front and rear ends of the rotating shaft are respectively rotatably connected to the outer side walls of the front and rear ends of the upper mold, and the front and rear ends of the rotating shaft are welded and fixed with shaft end screws, and the worm is fixedly connected to the outer side wall of the rotating shaft by a bayonet pin.

[0020] In the technical solution of the present invention, the rotating cylinder is rotatably connected to the top surface of the fixed horizontal plate, and a cylinder wall sliding groove that penetrates inside and outside is opened on the outer wall of the rotating cylinder. The worm wheel is meshed with the worm and is welded and fixed to the outer wall of the rotating cylinder.

[0021] In the technical solution of the present invention, the sliding disk is slidably connected to the inside of the rotating cylinder, the disk body protrusion is welded and fixed to the outer side wall of the sliding disk and the end extends to the outside of the cylinder wall slide groove, the top end of the threaded rod is welded and fixed to the outer side wall of the sliding disk and is adapted to the size of the threaded groove, the bottom end of the threaded rod is threadedly connected to the inside of the fixed horizontal plate, one end of the pressure spring abuts against the bottom surface of the sliding disk, and the other end abuts against the top surface of the fixed horizontal plate.

[0022] On the other hand, the present invention also provides a method for fastening special steel-based building construction concrete steel bar pipe piles, using the above-mentioned high-strength fasteners for special steel-based building construction concrete steel bar pipe piles, comprising the following steps:

[0023] S1. First, place the concrete reinforcement cage inside the lower mold in the fixed mold, and place the upper mold on the top surface of the lower mold by hoisting equipment;

[0024] S2. Then, the shaft end screw in the static fastening device is twisted by an electric wrench, which drives the rotating shaft to rotate, and then drives the worm to rotate, thereby driving the worm wheel in the rotating part to rotate in coordination;

[0025] S3, after the worm wheel rotates, it drives the rotating cylinder to rotate, and then the cylinder wall sliding groove cooperates with the disc body protrusion rod, driving the sliding disc to rotate inside the rotating cylinder;

[0026] S4. At this time, the threaded rod cooperates with the fixed horizontal plate to rotate downward, thereby fixing the threaded rod inside the thread groove, thereby fixing the lower mold and the upper mold;

[0027] S5, when the threaded rod moves downward inside the threaded groove, it conflicts with the movable rod, and drives the movable rod and the movable block to move downward, thereby changing the tilt angle of the toggle bracket;

[0028] S6. Subsequently, the movable horizontal plate moves upward under the drive of the two levers at the ends of the movable bracket, and the end of the expansion plug is inserted into the circular hole of the fixed horizontal plate;

[0029] S7. Afterwards, when the fixed mold is placed on the centrifugal drum device and rotates, the traction ball continuously provides force to the expansion plug through the connecting rope under the action of centrifugal force.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The high-strength fastener for building construction concrete reinforced pipe piles based on special steel and the fastening method thereof, when the screw at the shaft end is twisted to drive the rotating shaft to rotate, a plurality of rotating parts on both sides of the upper mold can be driven to rotate through a plurality of worm gears, and a plurality of threaded rods are fixed inside the fixed block at the same time, thereby reducing the labor intensity of workers and the time for fastening the concrete reinforced pipe piles.

[0032] 2. The high-strength fastener for building construction concrete reinforced pipe piles based on special steel and the fastening method thereof, when the threaded rod moves downward in the threaded groove, it will drive the movable plug rod to move, and by toggling the bracket, the movable cross plate is driven to move upward as a whole, so that the expansion plug is inserted into the interior of the fixed cross plate, and when the fixed mold rotates as a whole, the centrifugal force of the traction ball is converted into a force acting on the expansion plug, thereby improving the fastening degree of the fixed mold during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0035] Figure 3 It is a schematic cross-sectional view of the structure of the fixed mold in the present invention;

[0036] Figure 4 It is a schematic cross-sectional view of the structure of the dynamic fastening device in the present invention;

[0037] Figure 5 It is a schematic cross-sectional view of the structure of the fixed block in the present invention;

[0038] Figure 6 It is a schematic cross-sectional view of the structure of the inserting part of the present invention;

[0039] Figure 7 It is a schematic diagram of the structure of the static fastening device in the present invention;

[0040] Figure 8 It is a structural schematic diagram of the rotating part in the present invention;

[0041] Fig. 9 It is a schematic cross-sectional view of the structure of the rotating part in the present invention;

[0042] Fig.10 It is a structural schematic diagram of the tightening part in the present invention;

[0043] Description of reference numerals:

[0044] 100, fixed mold; 110, lower mold; 120, upper mold; 130, fixed horizontal plate; 140, fixed cover;

[0045] 200, dynamic fastening device; 210, fixed block; 211, placement groove; 212, sliding through hole; 213, threaded groove; 220, insertion part; 221, rotating rod; 222, toggle bracket; 223, moving block; 2230, block through groove; 224, moving insertion rod; 225, moving horizontal plate; 2250, plate edge through groove; 226, expansion plug; 227, traction ball; 228, connecting rope;

[0046] 300, static fastening device; 310, rotating shaft; 320, shaft end screw; 330, worm; 340, rotating part; 341, rotating cylinder; 3410, cylinder wall slide groove; 342, worm wheel; 343, tightening part; 3430, sliding disk; 3431, disk body protrusion; 3432, threaded rod; 344, pressure spring. DETAILED DESCRIPTION

[0047] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in 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.

[0048] See also Figure 1 - Fig.10 As shown, this embodiment provides a technical solution:

[0049] A high-strength fastener for building construction concrete steel bar pipe piles based on special steel comprises a fixed mold 100, a plurality of dynamic fastening devices 200 regularly arranged on both sides of the fixed mold 100, and a static fastening device 300 arranged above the dynamic fastening device 200;

[0050] In this embodiment, Figure 2-Figure 3As shown, the fixed mold 100 includes an upper mold 120 and a lower mold 110 symmetrically arranged in an upper and lower direction, a fixed horizontal plate 130 welded and fixed to the outer side walls of the left and right ends of the upper mold 120, and a fixed cover 140 fixedly connected to the outer side wall of the upper mold 120 by bolts, and a plurality of regularly distributed circular holes penetrating from top to bottom are opened on the top surface of the fixed horizontal plate 130;

[0051] Furthermore, the lower mold 110 and the upper mold 120 are used to ensure the overall strength of the fixed mold 100 , and the fixed transverse plate 130 and the fixed cover 140 are used to increase the placement space for the structure in the static fastening device 300 .

[0052] In this embodiment, Figure 4 - Figure 5 As shown, the dynamic fastening device 200 includes a fixed block 210 and an inserting portion 220 disposed inside the fixed block 210;

[0053] Specifically, the fixed block 210 is welded and fixed on the outer wall of the lower mold 110, a placement groove 211 is opened inside the fixed block 210, a sliding through hole 212 is opened at the center position of the top surface of the fixed block 210, and threaded grooves 213 connected to the placement groove 211 are opened on both sides of the sliding through hole 212 on the top surface of the fixed block 210.

[0054] Furthermore, the placement groove 211 on the fixed block 210 is used to increase the placement range for the insertion part 220, the sliding through hole 212 is used to limit the movement range of the internal structure of the insertion part 220, and the threaded groove 213 is used to cooperate with the structure in the static fastening device 300 to ensure the fixation between the lower mold 110 and the upper mold 120.

[0055] In this embodiment, Figure 4-Figure 6 As shown, the inserting part 220 includes a rotating rod 221, a group of toggle brackets 222 symmetrically arranged on the outside of the rotating rod 221, a moving block 223 that moves with the end of the toggle bracket 222, a moving inserting rod 224 arranged on the top surface of the moving block 223, a moving horizontal plate 225 that moves with the end of the toggle bracket 222, an expansion plug 226 arranged at the center of the top surface of the moving horizontal plate 225, a traction ball 227 arranged on the top surface of the expansion plug 226, and a connecting rope 228 connected between the traction ball 227 and the expansion plug 226;

[0056] Specifically, both ends of the rotating rod 221 are rotatably connected to the groove wall of the placement groove 211, the toggle bracket 222 is clamped and fixed to the rotating rod 221, and the interior of the moving block 223 is provided with a block through groove 2230 that runs through the left and right and is used to provide a moving range for the toggle rod at the end of the toggle bracket 222.

[0057] Furthermore, the movable rod 224 is welded and fixed on the top surface of the movable block 223, and the movable rod 224 is slidably connected to the inside of the thread groove 213. Both ends of the movable cross plate 225 are provided with plate edge grooves 2250 for providing a moving range for the end lever of the movable bracket 222.

[0058] Furthermore, the expansion plug 226 is welded and fixed on the top surface of the movable horizontal plate 225, and a circular hole connected to the top surface of the expansion plug 226 is opened inside the expansion plug 226. The upper and lower ends of the connecting rope 228 are respectively adhered and fixed to the wall of the circular hole of the expansion plug 226 and the traction ball 227.

[0059] Furthermore, when the movable rod 224 moves downward inside the threaded groove 213, it drives the movable block 223 to move downward, thereby changing the inclination angle of the toggle bracket 222. Subsequently, the movable cross plate 225 moves upward under the drive of the two toggle rods at the ends of the toggle bracket 222, and the end of the expansion plug 226 is inserted into the circular hole of the fixed cross plate 130. Afterwards, when the fixed mold 100 is placed on the centrifugal drum device and rotates, the traction ball 227 continuously provides force to the expansion plug 226 through the connecting rope 228 under the action of centrifugal force.

[0060] In this embodiment, Figure 7 As shown, the static fastening device 300 includes a rotating shaft 310, a plurality of worms 330 regularly distributed outside the rotating shaft 310, and a rotating portion 340 that cooperates with the worm 330 to move;

[0061] Specifically, the front and rear ends of the rotating shaft 310 are rotatably connected to the outer side walls of the upper mold 120 respectively, and the front and rear ends of the rotating shaft 310 are welded and fixed with shaft end screws 320, and the worm 330 is fixedly connected to the outer side wall of the rotating shaft 310 by a bayonet pin.

[0062] Furthermore, the shaft end screw 320 in the static fastening device 300 is twisted by an electric wrench, thereby driving the rotating shaft 310 to rotate, and then driving the worm 330 to rotate, thereby driving the structure in the rotating part 340 to rotate.

[0063] In this embodiment, Figure 7-10 As shown, the rotating part 340 includes a rotating cylinder 341, a worm gear 342 driving the rotating cylinder 341 to rotate, a tightening part 343 disposed inside the rotating cylinder 341, and a pressure spring 344 sleeved outside the tightening part 343;

[0064] Specifically, the rotating cylinder 341 is rotatably connected to the top surface of the fixed horizontal plate 130 , and a cylinder wall sliding groove 3410 that penetrates inside and outside is opened on the outer wall of the rotating cylinder 341 . The worm wheel 342 is meshed with the worm 330 and is welded and fixed to the outer wall of the rotating cylinder 341 .

[0065] Furthermore, the tightening portion 343 includes a sliding disk 3430 , a disk body protruding rod 3431 disposed on the outer side wall of the sliding disk 3430 , and a threaded rod 3432 disposed on the bottom surface of the sliding disk 3430 .

[0066] Furthermore, the sliding disk 3430 is slidably connected to the inside of the rotating cylinder 341, the disk body protrusion 3431 is welded and fixed to the outer wall of the sliding disk 3430 and the end extends to the outside of the cylinder wall slide groove 3410, the top end of the threaded rod 3432 is welded and fixed to the outer wall of the sliding disk 3430 and is adapted to the size of the threaded groove 213, the bottom end of the threaded rod 3432 is threadedly connected to the inside of the fixed horizontal plate 130, one end of the pressure spring 344 abuts against the bottom surface of the sliding disk 3430, and the other end abuts against the top surface of the fixed horizontal plate 130.

[0067] Furthermore, after the worm wheel 342 cooperates with the worm 330 to rotate, it drives the rotating cylinder 341 to rotate, and then the cylinder wall slide groove 3410 cooperates with the disk body protrusion 3431 to drive the sliding disk 3430 to rotate inside the rotating cylinder 341. At this time, the threaded rod 3432 cooperates with the fixed cross plate 130 to rotate downward, and then the threaded rod 3432 is fixed inside the thread groove 213, thereby fixing the lower mold 110 and the upper mold 120.

[0068] The present invention also provides a method for fastening special steel-based building construction concrete steel bar pipe piles, using the above-mentioned high-strength fasteners for special steel-based building construction concrete steel bar pipe piles, comprising the following steps:

[0069] S1. First, place the concrete reinforcement cage inside the lower mold 110 in the fixed mold 100, and place the upper mold 120 on the top surface of the lower mold 110 by a hoisting device;

[0070] S2. Next, the shaft end screw 320 in the static fastening device 300 is twisted by an electric wrench, thereby driving the rotating shaft 310 to rotate, and then driving the worm 330 to rotate, thereby driving the worm wheel 342 in the rotating part 340 to rotate in coordination;

[0071] S3, after the worm wheel 342 rotates, it drives the rotating cylinder 341 to rotate, and then the cylinder wall sliding groove 3410 cooperates with the disc body protruding rod 3431, driving the sliding disc 3430 to rotate inside the rotating cylinder 341;

[0072] S4, at this time, the threaded rod 3432 cooperates with the fixed horizontal plate 130 to rotate downward, thereby fixing the threaded rod 3432 inside the thread groove 213, thereby fixing the lower mold 110 and the upper mold 120;

[0073] S5. When the threaded rod 3432 moves downward inside the thread groove 213, it conflicts with the movable rod 224, and drives the movable rod 224 and the movable block 223 to move downward, thereby changing the tilt angle of the toggle bracket 222;

[0074] S6. Subsequently, the movable horizontal plate 225 moves upward under the drive of the two levers at the ends of the movable bracket 222, and the end of the expansion plug 226 is inserted into the circular hole of the fixed horizontal plate 130;

[0075] S7. Afterwards, when the fixed mold 100 is placed on the centrifugal drum device and rotates, the traction ball 227 continuously provides force to the expansion plug 226 through the connecting rope 228 under the action of centrifugal force, thereby improving the fastening degree of the fixed mold 100 during rotation.

[0076] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the specification and its equivalents.

Claims

1. A high-strength fastener for building construction concrete reinforced pipe piles based on special steel, comprising a fixed mold (100), a plurality of dynamic fastening devices (200) regularly arranged on both sides of the fixed mold (100), and a static fastening device (300) arranged above the dynamic fastening device (200); characterized in that: The dynamic fastening device (200) comprises a fixed block (210) and an inserting portion (220) arranged inside the fixed block (210); The inserting portion (220) comprises a rotating rod (221), a group of toggling brackets (222) symmetrically arranged outside the rotating rod (221), a moving block (223) moving with the end of the toggling bracket (222), a moving inserting rod (224) arranged on the top surface of the moving block (223), a moving horizontal plate (225) moving with the end of the toggling bracket (222), an expansion plug (226) arranged at the center position of the top surface of the moving horizontal plate (225), a traction ball (227) arranged on the top surface of the expansion plug (226), and a connecting rope (228) connected between the traction ball (227) and the expansion plug (226); The static fastening device (300) comprises a rotating shaft (310), a plurality of worms (330) regularly distributed outside the rotating shaft (310), and a rotating portion (340) that moves in coordination with the worms (330); The rotating part (340) comprises a rotating cylinder (341), a worm gear (342) driving the rotating cylinder (341) to rotate, a tightening part (343) arranged inside the rotating cylinder (341), and a pressure spring (344) sleeved on the outside of the tightening part (343); The tightening portion (343) comprises a sliding disk (3430), a disk body protruding rod (3431) arranged on the outer side wall of the sliding disk (3430), and a threaded rod (3432) arranged on the bottom surface of the sliding disk (3430).

2. The high-strength fastener for building construction concrete reinforced pipe piles based on special steel according to claim 1, characterized in that: The fixed mold (100) comprises an upper mold (120) and a lower mold (110) symmetrically arranged in an upper and lower direction, a fixed transverse plate (130) welded and fixed to the outer side walls at the left and right ends of the upper mold (120), and a fixed cover (140) fixedly connected to the outer side wall of the upper mold (120) by bolts, and a plurality of regularly distributed circular holes penetrating from top to bottom are provided on the top surface of the fixed transverse plate (130).

3. The high-strength fastener for building construction concrete reinforced pipe piles based on special steel according to claim 2, characterized in that: The fixed block (210) is welded and fixed on the outer wall of the lower mold (110), a placement groove (211) is provided inside the fixed block (210), a sliding through hole (212) is provided at the center of the top surface of the fixed block (210), and thread grooves (213) connected to the placement groove (211) are provided on both sides of the sliding through hole (212) on the top surface of the fixed block (210).

4. The high-strength fastener for building construction concrete reinforced pipe piles based on special steel according to claim 3, characterized in that: The two ends of the rotating rod (221) are rotatably connected to the groove wall of the placement groove (211), the toggle bracket (222) is fixedly connected to the rotating rod (221), and the interior of the moving block (223) is provided with a block through groove (2230) which runs through from left to right and is used to provide a moving range for the toggle rod at the end of the toggle bracket (222).

5. The high-strength fastener for building construction concrete reinforced pipe piles based on special steel according to claim 4, characterized in that: The movable plug rod (224) is welded and fixed on the top surface of the movable block (223), and the movable plug rod (224) is slidably connected to the inside of the thread groove (213). Both ends of the movable cross plate (225) are provided with plate edge through grooves (2250) for providing a moving range for the end lever of the moving bracket (222).

6. The high-strength fastener for building construction concrete reinforced pipe piles based on special steel according to claim 5, characterized in that: The expansion plug (226) is welded and fixed on the top surface of the movable horizontal plate (225), and a circular hole connected to the top surface of the expansion plug (226) is opened inside the expansion plug (226), and the upper and lower ends of the connecting rope (228) are respectively adhered and fixed to the wall of the circular hole of the expansion plug (226) and the traction ball (227).

7. The high-strength fastener for building construction concrete reinforced pipe piles based on special steel according to claim 6, characterized in that: The front and rear ends of the rotating shaft (310) are respectively rotatably connected to the outer side walls of the upper mold (120) at the front and rear ends, and the front and rear ends of the rotating shaft (310) are both welded and fixed with shaft end screws (320), and the worm (330) is fixedly connected to the outer side wall of the rotating shaft (310) by a bayonet pin.

8. The high-strength fastener for building construction concrete reinforced pipe piles based on special steel according to claim 7, characterized in that: The rotating cylinder (341) is rotatably connected to the top surface of the fixed horizontal plate (130), and a cylinder wall sliding groove (3410) penetrating inside and outside is opened on the outer wall of the rotating cylinder (341). The worm wheel (342) is meshed with the worm (330) and is welded and fixed to the outer wall of the rotating cylinder (341).

9. The high-strength fastener for building construction concrete reinforced pipe piles based on special steel according to claim 8, characterized in that: The sliding disk (3430) is slidably connected to the inside of the rotating cylinder (341), the disk body protrusion (3431) is welded and fixed to the outer wall of the sliding disk (3430) and the end extends to the outside of the cylinder wall slide groove (3410), the top end of the threaded rod (3432) is welded and fixed to the outer wall of the sliding disk (3430) and is adapted to the size of the threaded groove (213), the bottom end of the threaded rod (3432) is threadedly connected to the inside of the fixed horizontal plate (130), one end of the pressure spring (344) abuts against the bottom surface of the sliding disk (3430) and the other end abuts against the top surface of the fixed horizontal plate (130).

10. A method for fastening special steel-based concrete reinforced pipe piles for construction, using the high-strength fastener for special steel-based concrete reinforced pipe piles for construction as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. First, a concrete steel cage is placed inside a lower mold (110) in a fixed mold (100), and an upper mold (120) is placed on the top surface of the lower mold (110) by a hoisting device; S2. Next, the shaft end screw (320) in the static fastening device (300) is twisted by an electric wrench, thereby driving the rotating shaft (310) to rotate, thereby driving the worm (330) to rotate, thereby driving the worm wheel (342) in the rotating part (340) to rotate in coordination; S3, after the worm wheel (342) rotates, it drives the rotating cylinder (341) to rotate, and then the cylinder wall sliding groove (3410) cooperates with the disc body protruding rod (3431), driving the sliding disc (3430) to rotate inside the rotating cylinder (341); S4. At this time, the threaded rod (3432) cooperates with the fixed horizontal plate (130) to rotate downward, thereby fixing the threaded rod (3432) inside the thread groove (213), thereby fixing the lower mold (110) and the upper mold (120); S5, when the threaded rod (3432) moves downward inside the threaded groove (213), it conflicts with the movable rod (224), thereby driving the movable rod (224) and the movable block (223) to move downward, thereby changing the tilt angle of the toggle bracket (222); S6. Subsequently, the movable horizontal plate (225) is moved upwards under the driving of the two levers at the ends of the movable bracket (222), and the end of the expansion plug (226) is inserted into the circular hole of the fixed horizontal plate (130); S7. Afterwards, when the fixed mold (100) is placed on the centrifugal drum device and rotates, the traction ball (227) continuously provides a force to the expansion plug (226) through the connecting rope (228) under the action of centrifugal force.

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