Prefabricated pile forming device for composite of waste steel bars and recycled concrete and preparation method thereof

Abstract

The application provides a waste steel bar and recycled concrete composite precast pile forming device and a preparation method thereof, relates to the field of concrete precast pile forming and manufacturing, and comprises a threaded locking rod, a supporting rod and a rotating drum. The outer side of the threaded locking rod is rotationally connected with an upper mold shell. The outer side of the supporting rod is slidingly connected with a locking frame, and the bottom end of the locking frame is welded with a locking block. The outer side of the rotating drum is rotationally connected with a supporting drum, the outer side of the supporting drum is welded with a lower mold shell, the threaded deep hole of the rotating drum is meshingly connected with a threaded telescopic rod, and the front end of the threaded telescopic rod is welded with a plugging disc. Through the arrangement of the rotating drum, the threaded telescopic rod, the plugging disc, the threaded locking rod, the locking frame and the locking block, the forming and manufacturing process of the precast pile is more efficient and convenient, the universality of the precast pile mold shell is improved, and the problems of the fixed length structure of the traditional precast pile mold shell, the length adaptability adjustment according to different length precast pile manufacturing requirements, and the complicated and complex splicing combination and disassembly separation operation of the traditional precast pile mold shell are solved.

Description

Technical Field

[0001] This invention belongs to the field of precast concrete pile forming and manufacturing, and more specifically, it relates to a precast pile forming device and its preparation method that combines waste steel bars and recycled concrete. Background Technology

[0002] Precast piles are pile-type building components that are prefabricated in a factory or on a construction site and then driven into the foundation soil using pile driving equipment. They are mainly used in the foundation engineering of buildings and structures to transfer the load of the superstructure to the solid soil layer deep in the foundation. Currently, the manufacturing process of precast piles requires placing a steel reinforcement cage inside a precast pile mold of appropriate length, then pouring recycled concrete into the mold. After pouring, the upper and lower precast pile molds are closed and assembled using multiple sets of bolts. A crane then places the precast pile mold on a centrifugal rotating device, where high-speed centrifugal force adheres the recycled concrete inside the mold to the inner wall of the precast pile mold and rotates it into shape. As such, the traditional precast pile mold has a rigid and fixed overall structure, and its length cannot be adjusted to meet the manufacturing requirements of the precast pile. Therefore, when producing precast piles of different lengths, precast pile molds of corresponding structural lengths need to be prefabricated, increasing the customized production cost of precast piles and the mold customization process. In addition, since the upper and lower molds of the precast pile mold need to be closed and fixed using multiple sets of bolts and nuts, the disassembly and assembly process requires tightening multiple sets of bolts and nuts, making the splicing and disassembly of the precast pile mold cumbersome and complex, which seriously reduces the production efficiency of precast pile forming and manufacturing. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a precast pile forming device and its preparation method that combines waste steel bars and recycled concrete. This solves the problems of the rigid fixed length structure of traditional precast pile mold shells, which cannot adapt to the length requirements of precast piles of different lengths, and the cumbersome and complex splicing, assembly, disassembly, and separation operations of traditional precast pile mold shells.

[0004] This invention provides a precast pile forming device and its preparation method using a composite of waste steel bars and recycled concrete. The device includes a control unit mounted on the front end of a base frame, a through groove on the upper side of the base frame, a threaded rotating rod rotatably connected inside the base frame, and a handrail turntable welded to the rear end of the threaded rotating rod. It also includes a support frame, a guide rod, and a precast pile mold device. The lower side of the support frame is bolted to the base frame, and the rear side of the support frame has a through hole. A drive sleeve is rotatably connected inside the through hole, and a centrifugal rotary drive motor is mounted on the rear side of the support frame. A transmission rod is mounted on the motor shaft of the centrifugal rotary drive motor, and a drive gear is mounted at the front end of the transmission rod. A cover is bolted to the front side of the support frame. The front and rear ends of the guide rod are both welded to the base frame, and a slide is slidably connected to the outer side of the guide rod. A clamping sleeve is rotatably connected to the slide.

[0005] Furthermore, the precast pile mold device includes a lifting ring, an upper mold shell, a locking frame, a sealing disc, a lower mold shell, a threaded locking rod, a guide support rod, a threaded telescopic rod, a rotating cylinder, a support cylinder, a locking block, an adjusting knob, an opening and closing knob, and a support rod; the front end of the threaded locking rod is welded with an opening and closing knob, the outer side of the threaded locking rod is rotatably connected to the upper mold shell, the top of the upper mold shell is welded with a lifting ring, the left and right ends of the upper mold shell are provided with long strip protrusions, each set of long strip protrusions is provided with ten sets of vertically penetrating through groove structures; the outer side of the support rod is welded to the upper mold shell, the outer side of the support rod is slidably connected to the locking frame, the bottom end of the locking frame is welded with a locking block; the outer side of the rotating cylinder is rotatably connected to the upper mold shell; the outer side of the support rod is rotatably connected to the locking frame; the upper mold shell is welded to the outer side of the support rod, the locking frame is slidably connected to the outer side of the support rod, and the locking frame is slidably connected to the outer side of the support rod; the outer side of the rotating cylinder is rotatably connected to the locking frame; the upper mold shell is welded to the outer side of the support rod, the locking frame is slidably connected ... There is a support cylinder, and a lower mold shell is welded to the outer side of the support cylinder. The front and rear ends of the lower mold shell are provided with cylindrical protrusions. The front edge of the cylindrical protrusion of the lower mold shell is provided with eight sets of V-shaped right-angle grooves. The V-shaped right-angle grooves are arranged in a ring array around the cylindrical protrusion of the lower mold shell. The left and right ends of the lower mold shell are provided with long strip protrusions. Each set of long strip protrusions is provided with ten sets of vertical through grooves. An adjustment knob is welded to the rear end of the rotating cylinder. A threaded deep hole is provided at the center of the front end of the rotating cylinder. A threaded telescopic rod is engaged in the threaded deep hole of the rotating cylinder. A sealing plate is welded to the front end of the threaded telescopic rod. Four sets of guide support rods are welded to the rear side of the sealing plate.

[0006] Furthermore, the front side of the support cylinder is provided with four sets of circular deep holes, and guide support rods are inserted into the circular deep holes of the support cylinder.

[0007] Furthermore, the number of locking blocks is twenty sets, and each set of locking blocks has an L-shaped structure, with the upper side of the bent part of the L-shaped structure of the locking block having a sloping structure.

[0008] Furthermore, the number of lock frames is ten sets, each set of lock frames is an arc-shaped curved plate structure, and each set of lock frames has a threaded through hole near the top of the front side of the arc-shaped curved plate structure. The outer side of the threaded lock rod is threadedly engaged in the threaded through hole of the lock frame. The front side of the arc-shaped curved plate structure of the lock frame has a through hole structure that runs through the front and back near the left and right ends. The support rod is inserted into the through hole of the lock frame.

[0009] Furthermore, the cylindrical structure with an opening on the rear side of the drive sleeve has eight sets of cuboid protrusions at the bottom edge of the cylindrical structure inside. The cuboid protrusions of the drive sleeve are arranged in a ring array around the horizontal central axis of the drive sleeve structure. The cuboid protrusions of the drive sleeve are embedded in eight sets of V-shaped right-angle grooves in the lower mold shell. An external tooth structure is arranged around the outer side of the drive sleeve near the front end, and the drive gear is meshed with the external tooth structure of the drive sleeve.

[0010] Furthermore, the front side of the slide has a threaded through hole at the center near the bottom end, and the outer side of the threaded rotating rod is threadedly engaged in the threaded through hole of the slide. The front side of the slide has a through hole structure at the left and right sides, and the guide rod is inserted into the through hole structure of the slide.

[0011] A method for preparing precast piles composed of scrap steel bars and recycled concrete includes the following steps:

[0012] S1. Precast pile mold shell recycled concrete pouring operation: Manually turn the adjustment knob, the adjustment knob drives the rotating drum to rotate, the rotating drum drives the sealing plate connected to the threaded telescopic rod to fit against the inner wall of the lower mold shell and adjust and move back and forth according to the customized length of the precast pile. Then, place the steel reinforcement cage on the inner side of the lower mold shell and then pour the recycled concrete into the lower mold shell.

[0013] S2. Precast pile mold shell closing and locking splicing operation: The upper mold shell is lifted to the upper side of the lower mold shell by an external crane. At this time, the through groove of the long strip protrusion of the upper mold shell is aligned with the through groove of the long strip protrusion of the lower mold shell. The locking block is inserted into the through groove of the long strip protrusion of the lower mold shell. Then, the opening and closing knob is manually turned. The opening and closing knob drives the threaded locking rod to rotate. The threaded locking rod drives the ten sets of locking frames connected on the outer side to move forward. The locking frame drives the L-shaped locking block connected at the bottom to move forward. The inclined structure of the locking block pushes the bottom edge of the slot of the lower mold shell. The lower mold shell and the upper mold shell are pressed together and closed.

[0014] S3. Precast pile centrifugal rotation molding operation: The crane hook is detached from the lifting ring, and then the control machine controls the centrifugal rotation drive motor to start through the wire. The centrifugal rotation drive motor drives the drive gear to rotate through the transmission rod. The drive gear drives the drive rotating sleeve that is meshed on the outer side to rotate at high speed. The drive rotating sleeve drives the lower mold shell to rotate synchronously through the insertion structure of the cuboid protrusion in the V-shaped right angle groove of the cylindrical protrusion of the lower mold shell. This drives the drive rotating sleeve to rotate the lower mold shell synchronously until the centrifugal movement of the concrete inside the upper and lower mold shells forms the pipe pile structure of the precast pile.

[0015] S4. Precast pile mold removal and demolding operation: Attach the hook of the external crane to the lifting ring. The external crane will lift the precast pile mold assembly. Then, manually rotate the handrail turntable. The handrail turntable will drive the sliding frame, which is engaged with the outer side of the threaded rotating rod, to move backward along the guide rod. This will cause the clamping sleeve to disengage from the rear cylindrical protrusion of the lower mold shell. Then, the external crane will lift and transport the precast pile mold assembly to the demolding area. Then, rotate the opening and closing knob in the opposite direction. The opening and closing knob will drive the threaded locking rod to rotate in the opposite direction. The threaded locking rod will drive the ten sets of locking frames, which are engaged with the outer side, to move backward. The locking frames will then drive the L-shaped locking blocks, which are welded to the bottom, to move backward. The inclined structure of the locking blocks will disengage from the edge of the groove at the bottom of the lower mold shell. The lower mold shell and the upper mold shell will then be loosely separated.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In this invention, the threaded transmission mechanism formed by the inner thread of the rotating drum and the outer thread of the threaded telescopic rod allows the sealing disc to move back and forth within the lower mold shell, driven by the threaded telescopic rod. This allows for flexible adjustment of the concrete bearing capacity within the mold shell according to the customized length requirements of the precast pile. This eliminates the need for a fixed structure in the traditional precast pile mold shell, eliminating the need to customize mold shells for precast piles of different lengths. This effectively reduces the manufacturing cost of the mold shell, simplifies the cumbersome customization process caused by length differences in the production process, and improves the versatility and economy of the precast pile mold.

[0018] 2. In this invention, a quick-locking structure composed of threaded locking rods, locking frames, and locking blocks is adopted. By simply turning the opening and closing knob, ten sets of locking frames can be moved synchronously through threaded transmission, so that twenty sets of locking blocks can simultaneously disengage from or push against the edge of the through groove of the lower mold shell, realizing the rapid closing and separation of the upper and lower mold shells. This eliminates the complicated operation of tightening multiple sets of bolts and nuts required in the traditional mold shell assembly and disassembly process, greatly shortening the time for mold shell assembly and disassembly, and making the precast pile forming and manufacturing process more efficient and convenient. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the front side view of the present invention.

[0021] Figure 3 This is a front view structural diagram of the present invention.

[0022] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0023] Figure 5 This is the invention Figure 4 Enlarged structural diagram of part A in the middle.

[0024] Figure 6 This is the invention Figure 4 Enlarged structural diagram of part B in the middle.

[0025] Figure 7 This is the invention Figure 4 Enlarged structural diagram of part C in the middle.

[0026] Figure 8 This is an exploded structural diagram of the present invention.

[0027] Figure 9 This is the invention Figure 8 Enlarged structural diagram of part D in the middle.

[0028] Figure 10 This is a schematic diagram of the precast pile mold device of the present invention.

[0029] Figure 11 This is a cross-sectional structural diagram of the precast pile mold device of the present invention.

[0030] Figure 12 This is the invention Figure 11 Enlarged structural diagram of part E in the middle.

[0031] Figure 13 This is a schematic diagram of the process flow of the present invention.

[0032] Figure label:

[0033] 1. Base frame;

[0034] 2. Bracket;

[0035] 3. Carriage;

[0036] 4. Control unit;

[0037] 5. Masking;

[0038] 6. Centrifugal rotary drive motor;

[0039] 7. Drive gear;

[0040] 8. Drive rotating sleeve;

[0041] 9. Clamping swivel;

[0042] 10. Guide rod;

[0043] 11. Threaded rotating rod;

[0044] 12. Handrail turntable;

[0045] 13. Transmission rod;

[0046] 14. Precast pile mold device; 1401. Lifting ring; 1402. Upper mold shell; 1403. Locking frame; 1404. Sealing plate; 1405. Lower mold shell; 1406. Threaded locking rod; 1407. Guide support rod; 1408. Threaded telescopic rod; 1409. Rotary cylinder; 1410. Support cylinder; 1411. Locking block; 1412. Adjusting knob; 1413. Opening and closing knob; 1414. Support rod. Detailed Implementation

[0047] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0048] like Figures 1-13As shown, the present invention provides a precast pile forming device and its preparation method for a composite of waste steel bars and recycled concrete. The device includes a control unit 4 installed at the front end of a base frame 1, a through groove on the upper side of the base frame 1, a threaded rotating rod 11 rotatably connected inside the base frame 1, and a handrail turntable 12 welded to the rear end of the threaded rotating rod 11. It also includes a support 2, a guide rod 10, and a precast pile mold device 14. The base frame 1 is bolted to the lower side of the support 2, a through hole is provided on the rear side of the support 2, a drive sleeve 8 is rotatably connected inside the through hole, a centrifugal rotary drive motor 6 is installed on the rear side of the support 2, a transmission rod 13 is installed on the motor shaft of the centrifugal rotary drive motor 6, a drive gear 7 is installed at the front end of the transmission rod 13, and a cover 5 is bolted to the front side of the support 2. The base frame 1 is welded to both the front and rear ends of the guide rod 10, a slide 3 is slidably connected to the outer side of the guide rod 10, and a clamping sleeve 9 is rotatably connected to the slide 3.

[0049] In this embodiment of the invention, the precast pile mold device 14 includes a lifting ring 1401, an upper mold shell 1402, a locking frame 1403, a sealing disc 1404, a lower mold shell 1405, a threaded locking rod 1406, a guide support rod 1407, a threaded telescopic rod 1408, a rotating cylinder 1409, a support cylinder 1410, a locking block 1411, an adjusting knob 1412, an opening and closing knob 1413, and a support rod 1414; the opening and closing knob 1413 is welded to the front end of the threaded locking rod 1406, and the upper mold shell 1402 is rotatably connected to the outer side of the threaded locking rod 1406. A lifting ring 1401 is welded to the top of the upper mold shell 1402. Long strip protrusions are provided at both the left and right ends of the upper mold shell 1402, and each set of long strip protrusions has ten sets of through-grooves. The upper mold shell 1402 is welded to the outer side of the support rod 1414, and a locking frame 1403 is slidably connected to the outer side of the support rod 1414. A locking block 1411 is welded to the bottom end of the locking frame 1403. A support cylinder 1410 is rotatably connected to the outer side of the rotating cylinder 1409, and a lower mold shell 1405 is welded to the outer side of the support cylinder 1410. The front and rear ends of the lower mold shell 1405 are provided with… The lower mold shell 1405 has cylindrical protrusions. Eight sets of V-shaped right-angle grooves are provided on the front edge of the cylindrical protrusions at the front end of the lower mold shell 1405. These V-shaped right-angle grooves are arranged in a circular array around the cylindrical protrusions of the lower mold shell 1405. Long strip protrusions are provided at both the left and right ends of the lower mold shell 1405. Each set of long strip protrusions has ten sets of through-grooves. An adjusting knob 1412 is welded to the rear end of the rotating cylinder 1409. A threaded deep hole is provided at the center of the front end of the rotating cylinder 1409, and a threaded telescopic rod 1408 is engaged within the threaded deep hole of the rotating cylinder 1409. The threaded telescopic rod 1408 has a sealing disc 1404 welded to its front end. The sealing disc 1404 has four sets of guide support rods 1407 welded to its rear side. When the adjusting knob 1412 drives the rotating drum 1409 to rotate, the rotating drum 1409 drives the threaded telescopic rod 1408, which is meshed with the inner side, to move forward or backward inside the lower mold shell 1405, changing the length distance between the sealing disc 1404 and the front end of the lower mold shell 1405. The concrete bearing length space of the lower mold shell 1405 can be flexibly adjusted according to the customized length requirements of the precast pile.

[0050] In this embodiment of the invention, the front side of the support cylinder 1410 is provided with four sets of circular deep holes. A guide support rod 1407 is inserted into the circular deep holes of the support cylinder 1410. The guide support rod 1407 supports the sealing plate 1404 welded at the front end to move back and forth in a directional manner, so as to prevent the threaded telescopic rod 1408 from rotating synchronously through the thread friction during the rotation of the rotating cylinder 1409, and ensure that the threaded telescopic rod 1408 drives the sealing plate 1404 to move back and forth stably against the inner wall of the lower mold shell 1405.

[0051] In this embodiment of the invention, there are twenty sets of locking blocks 1411. Each set of locking blocks 1411 has an L-shaped structure. The upper side of the bent part of the L-shaped structure of the locking block 1411 is a sloping structure. When the locking frame 1403 drives the sloping structure of the locking block 1411 to press forward against the front edge of the through groove of the lower mold shell 1405, the sloping structure of the locking block 1411 pushes the long strip protrusion of the lower mold shell 1405 to press upward against the long strip protrusion of the upper mold shell 1402, so that the upper mold shell 1402 and the lower mold shell 1405 are tightly clamped and closed.

[0052] In this embodiment of the invention, there are ten sets of lock frames 1403. Each set of lock frames 1403 is an arc-shaped bent plate structure. The front side of the arc-shaped bent plate structure of each set of lock frames 1403 is provided with a threaded through hole near the top. The outer side of the threaded lock rod 1406 is threadedly engaged with the threaded through hole of the lock frame 1403. The front side of the arc-shaped bent plate structure of the lock frame 1403 is provided with a through hole structure that runs from front to back near the left and right ends. The support rod 1414 is inserted through the lock frame 1403. Inside the through hole, as the opening and closing knob 1413 drives the threaded locking rod 1406 to rotate, the threaded locking rod 1406 drives the ten sets of locking frames 1403 connected to the outer side to move back and forth along the support rod 1414, so that the locking frames 1403 drive the locking blocks 1411 welded to the bottom to move synchronously, so that the twenty sets of locking blocks 1411 simultaneously disengage from or push the through groove edge structure of the lower mold shell 1405, thus completing the quick splicing, installation and disassembly of the lower mold shell 1405 and the upper mold shell 1402.

[0053] In this embodiment of the invention, the cylindrical structure with an opening on the rear side of the driving rotating sleeve 8 has eight sets of cuboid protrusions at the bottom edge of the cylindrical structure. The cuboid protrusions of the driving rotating sleeve 8 are arranged in a ring array around the horizontal central axis of the cylindrical structure. The cuboid protrusions of the driving rotating sleeve 8 are embedded in the eight sets of V-shaped right-angle grooves of the lower mold shell 1405. The outer side of the driving rotating sleeve 8 is surrounded by an external tooth structure near the front end. The driving gear 7 is meshed with the external tooth structure of the driving rotating sleeve 8. During the process of the centrifugal rotation driving motor 6 driving the driving gear 7 to rotate, the driving gear 7 drives the driving rotating sleeve 8 to rotate at high speed. The driving rotating sleeve 8 drives the lower mold shell 1405 and the upper mold shell 1402 to rotate synchronously at high speed through the nesting structure formed by the cuboid protrusions in the eight sets of V-shaped right-angle grooves of the lower mold shell 1405, thus completing the centrifugal rotation molding of recycled concrete in the lower mold shell 1405 and the upper mold shell 1402.

[0054] In this embodiment of the invention, the front side of the slide 3 has a through-hole with threads extending from front to back at the center near the bottom. The outer side of the threaded rotating rod 11 is threadedly engaged with the threaded through-hole of the slide 3. The front side of the slide 3 has through-hole structures extending from front to back near the left and right sides. The guide rod 10 is inserted into the through-hole structure of the slide 3. During the rotation of the threaded rotating rod 11 driven by the handrail turntable 12, the threaded rotating rod 11 drives the slide 3, which is engaged with the outer side, to rotate along the guide rod, causing the clamping sleeve 9, which is rotated at the top, to rotate along the guide rod. 10. Moving forward or backward, when the slide 3 drives the clamping rotating sleeve 9 to move forward, the clamping rotating sleeve 9 cooperates with the driving rotating sleeve 8 to squeeze the lower mold shell 1405 back and forth, ensuring that the V-shaped right-angle groove of the front end protrusion of the lower mold shell 1405 is stably stuck in the cuboid protrusion of the driving rotating sleeve 8. When the slide 3 drives the clamping rotating sleeve 9 to move forward, the clamping rotating sleeve 9 disengages from the rear end protrusion of the lower mold shell 1405, making it easy for an external crane to lift and drive the precast pile mold device 14 to separate and dismantle from the clamping rotating sleeve 9 and the driving rotating sleeve 8.

[0055] Specific usage and functions of this invention:

[0056] In the precast pile forming process of this invention, the adjusting knob 1412 is first manually rotated, which drives the rotating cylinder 1409 to rotate. Since the outer threaded connection of the threaded telescopic rod 1408 is threadedly engaged with the inner threaded structure of the rotating cylinder 1409, the rotating cylinder 1409 drives the sealing disc 1404, which is welded to the threaded telescopic rod 1408, to move back and forth against the inner wall of the lower mold shell 1405 according to the customized length of the precast pile. Then, the reinforcing steel cage is placed on the inner side of the lower mold shell 1405, and recycled concrete is injected into the lower mold shell 1405. Afterwards, an external crane lifts the upper mold shell 1402 to the upper side of the lower mold shell 1405. At this time, the through groove of the long convex plate of the upper mold shell 1402 and the long strip of the lower mold shell 1405... The slots of the convex plates are aligned vertically. The locking block 1411 is inserted into the slot of the long strip-shaped convex plate of the lower mold shell 1405. Then, the opening and closing knob 1413 is manually rotated. The opening and closing knob 1413 drives the threaded locking rod 1406 to rotate. Since the threaded locking rod 1406 is threadedly engaged in the threaded through hole of the locking frame 1403, the threaded locking rod 1406 drives the ten sets of locking frames 1403 connected on the outer side to move forward. The locking frames 1403 then drive the L-shaped locking block 1411, which is welded to the bottom end, to move forward. The inclined structure of the locking block 1411 pushes the edge of the slot at the bottom end of the slot of the lower mold shell 1405. The lower mold shell 1405 and the upper mold shell 1402 are pressed tightly together and closed. Then, the crane hook is disengaged from the lifting ring 1401, and then the control machine 4 is turned on. The centrifugal drive motor 6 is started via a wire control, which in turn drives the drive gear 7 to rotate through the transmission rod 13. Since the drive gear 7 is meshed with the external tooth structure of the drive sleeve 8, the drive gear 7 drives the drive sleeve 8, which is meshed with the outer side, to rotate at high speed. The drive sleeve 8, through the insertion structure of the cuboid protrusion in the V-shaped right-angle groove of the cylindrical protrusion of the lower mold shell 1405, causes the drive sleeve 8 to drive the lower mold shell 1405 to rotate synchronously until the centrifugal motion of the concrete inside the upper mold shell 1402 and the lower mold shell 1405 forms the precast pile pipe pile structure. After the molding process is completed, the hook of the external crane is hung on the lifting ring 1401, and the external crane lifts the precast pile mold device 14. Then, the handrail turntable is manually rotated. 12. The handrail turntable 12 drives the slide 3, which is engaged with the outer side of the threaded rotating rod 11, to move backward along the guide rod 10, causing the clamping rotating sleeve 9 to disengage from the rear cylindrical protrusion of the lower mold shell 1405. Then, the precast pile mold device 14 is lifted and transported to the demolding area by an external crane. Then, the opening and closing knob 1413 is rotated in the opposite direction, which drives the threaded locking rod 1406 to rotate in the opposite direction. The threaded locking rod 1406 drives the ten sets of locking frames 1403 engaged with the outer side to move backward. The locking frames 1403 then drive the L-shaped locking block 1411, which is welded to the bottom end, to move backward. The inclined structure of the locking block 1411 disengages from the edge of the groove at the bottom end of the lower mold shell 1405, and the lower mold shell 1405 and the upper mold shell 1402 are loosely separated.Then, the precast piles are removed, completing the precast pile forming process.

[0057] All the above components are installed, connected, or set up using common mechanical methods, such as welding, threaded connections, and screw connections. Furthermore, the specific structure, model, and coefficient indicators of all components are based on their own technologies; any method that achieves the desired effect can be implemented. The control unit 4 and centrifugal rotary drive motor 6 mentioned above are common commercially available components. Upon purchase and use, simply follow the instruction manual provided with the purchase; therefore, further details are omitted here.

[0058] The technical solutions of the present invention are not limited to the scope of the embodiments of the present invention, and the technical contents not described in detail in the present invention are all known technologies.

Claims

1. A precast pile forming device composed of waste steel bars and recycled concrete, comprising a base frame (1), a control machine (4) installed at the front end of the base frame (1), a through groove provided on the upper side of the base frame (1), a threaded rotating rod (11) rotatably connected inside the base frame (1), and a handrail turntable (12) welded to the rear end of the threaded rotating rod (11); characterized in that: It also includes a bracket (2), a guide rod (10) and a precast pile mold device (14); the lower side of the bracket (2) is connected to a base frame (1) by bolts, the rear side of the bracket (2) is provided with a through hole, a drive sleeve (8) is rotatably connected in the through hole of the bracket (2), a centrifugal rotary drive motor (6) is installed on the rear side of the bracket (2), a transmission rod (13) is installed on the motor shaft of the centrifugal rotary drive motor (6), a drive gear (7) is installed at the front end of the transmission rod (13), and a cover (5) is connected to the front side of the bracket (2) by bolts; The front and rear ends of the guide rod (10) are welded with a base frame (1), and the outer side of the guide rod (10) is slidably connected with a slide frame (3). A clamping sleeve (9) is rotatably connected to the slide frame (3). The precast pile mold device (14) includes a lifting ring (1401), an upper mold shell (1402), a locking frame (1403), a sealing plate (1404), a lower mold shell (1405), a threaded locking rod (1406), a guide support rod (1407), a threaded telescopic rod (1408), a rotating cylinder (1409), a support cylinder (1410), a locking block (1411), an adjusting knob (1412), an opening and closing knob (1413), and a support rod (1414). The threaded locking rod (1406) has an opening and closing knob (1413) welded to its front end. The outer side of the threaded locking rod (1406) is rotatably connected to the upper mold shell (1402). The top of the upper mold shell (1402) is welded to the top of the upper mold shell (1402). The left and right ends of the upper mold shell (1402) are provided with long strip protrusions. Each set of long strip protrusions is provided with ten sets of vertically penetrating through slot structures. The outer side of the support rod (1414) is welded to the upper mold shell (1402). The outer side of the support rod (1414) is slidably connected to the lock frame (1403). The bottom end of the lock frame (1403) is welded to the lock block (1411). The outer side of the rotating cylinder (1409) is rotatably connected to the support cylinder (1410). The outer side of the support cylinder (1410) is welded to the lower mold shell (1405). 5) The front and rear ends are provided with cylindrical protrusions. The front side edge of the cylindrical protrusion of the lower mold shell (1405) is provided with eight sets of V-shaped right-angle grooves. The V-shaped right-angle grooves are arranged in a ring array around the cylindrical protrusion of the lower mold shell (1405). The left and right ends of the lower mold shell (1405) are provided with long strip protrusions. Each set of long strip protrusions is provided with ten sets of through grooves that run vertically. The rear end of the rotating cylinder (1409) is welded with an adjustment knob (1412). The center of the front end of the rotating cylinder (1409) is provided with a threaded deep hole. The threaded deep hole of the rotating cylinder (1409) is meshed with a threaded telescopic rod (1408). The front end of the threaded telescopic rod (1408) is welded with a sealing plate (1404). The rear side of the sealing plate (1404) is welded with four sets of guide support rods (1407).

2. The precast pile forming device of waste steel bars and recycled concrete as described in claim 1, characterized in that: The front side of the support cylinder (1410) is provided with four sets of circular deep holes, and a guide support rod (1407) is inserted into the circular deep holes of the support cylinder (1410).

3. The precast pile forming device of waste steel bars and recycled concrete as described in claim 1, characterized in that: The number of the locking blocks (1411) is twenty sets, and each set of locking blocks (1411) is an L-shaped structure. The upper side of the bent part of the L-shaped structure of the locking block (1411) is a sloping structure.

4. The precast pile forming device of waste steel bars and recycled concrete as described in claim 1, characterized in that: The number of lock frames (1403) is ten sets. Each set of lock frames (1403) is an arc-shaped bent plate structure. The front side of the arc-shaped bent plate structure of each set of lock frames (1403) is provided with a threaded through hole near the top. The outer side of the threaded lock rod (1406) is threadedly engaged in the threaded through hole of the lock frame (1403). The front side of the arc-shaped bent plate structure of the lock frame (1403) is provided with a through hole structure that runs through the front and back near the left and right ends. The support rod (1414) is inserted into the through hole of the lock frame (1403).

5. The precast pile forming device of waste steel bars and recycled concrete as described in claim 1, characterized in that: The cylindrical structure with an opening on the rear side of the drive sleeve (8) has eight sets of cuboid protrusions at the bottom edge of the cylindrical structure inside the drive sleeve (8). The cuboid protrusions of the drive sleeve (8) are arranged in a ring array around the horizontal central axis of the drive sleeve (8) cylindrical structure. The cuboid protrusions of the drive sleeve (8) are embedded in the eight sets of V-shaped right-angle grooves of the lower mold shell (1405). The outer side of the drive sleeve (8) is surrounded by an external tooth structure near the front end. The drive gear (7) is meshed with the external tooth structure of the drive sleeve (8).

6. The precast pile forming device of waste steel bars and recycled concrete as described in claim 1, characterized in that: The front side of the slide (3) is provided with a threaded through hole at the center of the bottom end. The outer side of the threaded rotating rod (11) is threadedly engaged in the threaded through hole of the slide (3). The front side of the slide (3) is provided with a through hole structure at the left and right sides. The guide rod (10) is inserted into the through hole structure of the slide (3).

7. The method for forming and preparing precast piles composed of waste steel bars and recycled concrete as described in any one of claims 1-6, characterized in that: Includes the following steps: S1. Precast pile mold shell recycled concrete pouring operation: Manually turn the adjustment knob (1412), the adjustment knob (1412) drives the rotating cylinder (1409) to rotate, the rotating cylinder (1409) drives the sealing plate (1404) connected to the threaded telescopic rod (1408) to fit against the inner wall of the lower mold shell (1405) and adjust and move back and forth according to the customized length of the precast pile. Then, the steel reinforcement cage is placed on the inner side of the lower mold shell (1405), and then the recycled concrete is injected into the lower mold shell (1405). S2. Precast pile formwork shell closing and locking splicing operation: The upper formwork shell (1402) is lifted by an external crane to the upper side of the lower formwork shell (1405). At this time, the through groove of the long strip protrusion of the upper formwork shell (1402) is aligned with the through groove of the long strip protrusion of the lower formwork shell (1405). The locking block (1411) is inserted into the through groove of the long strip protrusion of the lower formwork shell (1405). Then, the opening and closing knob (1413) is manually rotated. The threaded locking rod (1406) rotates, and the threaded locking rod (1406) drives the ten sets of locking frames (1403) connected to the outer side to move forward. The locking frames (1403) then drive the L-shaped locking block (1411) connected to the bottom to move forward. The inclined structure of the locking block (1411) pushes the bottom edge of the groove of the lower mold shell (1405), and the lower mold shell (1405) and the upper mold shell (1402) are pressed together and closed. S3. Precast pile centrifugal rotation molding operation: The crane hook is detached from the lifting ring (1401), and then the control machine (4) controls the centrifugal rotation drive motor (6) to start through the wire. The centrifugal rotation drive motor (6) drives the drive gear (7) to rotate through the transmission rod (13). The drive gear (7) drives the drive rotating sleeve (8) connected to the outer side to rotate at high speed. The drive rotating sleeve (8) uses the insertion structure of the cuboid protrusion in the V-shaped right angle groove of the cylindrical protrusion of the lower mold shell (1405) to drive the drive rotating sleeve (8) to rotate synchronously at the lower mold shell (1405) until the centrifugal movement of the concrete inside the upper mold shell (1402) and the lower mold shell (1405) forms the pipe pile structure of the precast pile. S4. Demolding and removal operation of precast pile mold: Hang the hook of the external crane on the lifting ring (1401), and the external crane lifts the precast pile mold device (14). Then manually rotate the handrail turntable (12). The handrail turntable (12) drives the slide (3) connected to the outer side of the threaded rotating rod (11) to move backward along the guide rod (10), so that the clamping rotating sleeve (9) disengages backward from the rear cylindrical protrusion of the lower mold shell (1405). Then the external crane lifts the precast pile mold device (14) and transports it to the demolding area. Then reverse Turn the start / stop knob (1413) to rotate. The start / stop knob (1413) drives the threaded locking rod (1406) to rotate in the opposite direction. The threaded locking rod (1406) drives the ten sets of locking frames (1403) connected to the outer side to move backward. The locking frames (1403) then drive the L-shaped locking block (1411) connected to the bottom end to move backward. The inclined structure of the locking block (1411) disengages from the bottom edge of the groove of the lower mold shell (1405). The lower mold shell (1405) and the upper mold shell (1402) are loosely separated.

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