Adjustable forming die for special-shaped concrete pipe pile and concrete pipe pile forming method

Abstract

The invention discloses a special-shaped concrete pipe pile adjustable forming die and a concrete pipe pile forming method, and relates to the technical field of concrete pipe piles. The special-shaped concrete pipe pile adjustable forming die comprises a base, symmetrically-distributed fixing bases are fixedly connected to the top of the base, and an adjusting structure is installed at the end, away from the fixing bases, of the top of the base; the adjusting structure comprises a sliding strip connected to the top of the base in a sliding mode. According to the adjustable forming die for the special-shaped concrete pipe pile and the concrete pipe pile forming method, a combined structure of the sliding grooves, the sliding strips and the lead screws is designed at the top of the base, so that the distance between the barrel-shaped dies can be flexibly adjusted, the lead screws are driven by the double-shaft motor to rotate, and the sliding strips are driven to stably slide in the linear direction; by means of the modular splicing design of the first mold and the second mold, additional mold assemblies can be additionally arranged according to actual needs, the length of the barrel-shaped mold is increased, and therefore the machining requirements of concrete pipe piles of different specifications are met.

Description

Technical Field

[0001] The invention relates to the technical field of concrete pipe piles, in particular to an adjustable forming die for special-shaped concrete pipe piles and a concrete pipe pile forming method. Background Art

[0002] The concrete pipe pile forming mold is a tool used to manufacture concrete pipe piles. The existing concrete pipe pile forming mold is easy to cause uneven distribution of mortar inside it during use, affecting product quality.

[0003] In order to overcome the above defects, a Chinese patent of the prior art (publication number: CN116872348B) discloses a concrete pipe pile forming mold, including a base, a mold mechanism and a winding mechanism, wherein the mold mechanism is located at the top of the base, the winding mechanism is located at one side of the mold mechanism, and the top of the base is fixedly connected with a fixed frame; the winding mechanism includes a rotating plate, the inner wall of the rotating plate is fixedly connected with a rotating shaft, the inner wall of the rotating plate is fixedly connected with a pipe reinforcement winding assembly, the inner wall of the rotating plate is fixedly connected with a blocking assembly, a plate moving groove is opened on one side of the fixed frame, and the inner wall of the plate moving groove is fixedly connected with a rotating assembly; the cable belt is driven to move by a double-axis motor, thereby driving the tensioning installation plate to move, and by changing the speed of the double-axis motor, the distance between the wound steel bars is adjusted, thereby achieving a concrete pipe pile frame that meets the standards, and the telescopic cylinder is controlled to extend and retract to push the annular installation plate to the inside of the lower mold, and the rotating bolt is rotated for sealing and tightening, saving labor costs; There is also a Chinese patent of the prior art (publication number: CN102275221B) which discloses a concrete prefabricated component or pipe pile forming mold and a concrete pipe pile forming method with low concrete water content and no leakage of slurry. The upper mold is composed of a distribution molding mold and a centrifugal upper mold to form a distribution molding mold. The upper end of the distribution molding mold is provided with a distribution opening along the length, and more than one set of vibrators are arranged on both sides of the distribution molding mold. The advantages are: first, since the water content in the concrete material is greatly reduced, not only the strength of the manufactured concrete pipe pile is improved, but also the water consumption is reduced; second, the design of the distribution molding mold not only enhances the density of the wall thickness of the formed prefabricated component or pipe pile, but also ensures the reliable fit between the centrifugal upper mold die mouth and the lower mold die mouth, avoids the leakage of cement slurry in the concrete slurry during centrifugal molding, not only ensures the quality of the formed concrete pipe pile, but also avoids the environmental pollution of cement slurry, saves water resources, and does not need to use water to clean the die mouth, which saves labor and improves production efficiency.

[0004] Although the prior art can overcome the above-mentioned deficiencies, other problems still exist in its operation: the concrete pipe pile forming mold is generally fixed in size, and it is not convenient to adjust the size of the mold during use. Summary of the invention

[0005] The purpose of the present invention is to provide an adjustable forming mold for special-shaped concrete pipe piles and a concrete pipe pile forming method to solve the problem that the concrete pipe pile forming mold in the above-mentioned background technology is generally fixed in size and it is not convenient to adjust the size of the mold during use.

[0006] To achieve the above object, the present invention provides the following technical solutions: 1. An adjustable forming mold for special-shaped concrete pipe piles, comprising a base, the top of which is fixedly connected to symmetrically distributed fixing seats, and an adjustment structure is installed at one end of the top of the base away from the fixing seats;

[0007] The adjustment structure includes a slide bar slidably connected to the top of the base, and the slide bar is provided with two slide bars aligned with the fixed seats, the two fixed seats and the top of the slide bar are fixedly connected with a mounting plate, and the other fixed seat and the top of the slide bar are fixedly connected with a fixed plate, the top of the mounting plate is rotatably connected with a rotating plate, and one end of the rotating plate away from the mounting plate is aligned with the fixed plate;

[0008] The mounting plate, the fixing plate and the rotating plate form a sleeve structure, and a forming structure is installed inside the sleeve structure.

[0009] Preferably, a connecting block is fixedly connected in the middle of one end of the rotating plate away from the mounting plate, and a bolt is slidably connected inside the connecting block. A mounting block is fixedly connected in the middle of one end of the fixing plate away from the fixing seat or the sliding bar, and the bolt is threadedly connected inside the mounting block.

[0010] Preferably, the inner top of the rotating plate is rotatably connected to two symmetrically distributed rotating shafts, and the outer side of the rotating shafts is fixedly connected to equidistantly distributed driving wheels, the fixed seat and the top of the slide bar are both fixedly connected to equidistantly distributed mounting seats, and the fixed seat and the top of the slide bar are rotatably connected via the mounting seat and the rotating shaft.

[0011] Preferably, a rotating motor is fixedly connected to one end of the top of the rotating plate, and a belt is rotatably connected to the output end of the rotating motor, a pulley is fixedly connected to one end of the rotating shaft inside the rotating plate, and the pulley at the end of the rotating shaft is rotatably connected to the outer side of the pulley at the output end of the rotating motor.

[0012] Preferably, two symmetrically distributed slide grooves are provided on the top of the base, and each slide groove is slidably connected to the slide bar, a lead screw is rotatably connected inside the slide groove, and the lead screw is threadedly connected to the inside of the slide bar, a transmission bevel gear is fixedly connected to the end of the slide groove, and a dual-axis motor is fixedly connected to one end of the base, and the two output ends of the dual-axis motor are meshed with the transmission bevel gear through the bevel gear.

[0013] Preferably, the molding structure includes a first mold installed inside a sleeve structure formed by a mounting plate, a fixed plate and a rotating plate, and a second mold is snap-connected to the top of the first mold, and the first mold and the second mold form a cylindrical mold, and the outer sides of the first mold and the second mold are fixedly connected with equidistantly distributed reinforcement rings, and the outer side of each reinforcement ring is fixedly connected with a driving ring at intervals, and the driving ring is rotatably connected to the inner side of the driving wheel.

[0014] Preferably, both sides of the first mold are provided with equidistantly distributed fixing holes, and both sides of the second mold are installed with equidistantly distributed bolts, and the bolts pass through the sides of the second mold and are threadedly connected to the fixing holes. The first mold and the second mold form a cylindrical mold with two installed on the top of the base, and the two cylindrical molds are respectively installed on the top of the fixed seat and the top of the sliding bar.

[0015] Preferably, the outer sides of one end of the first mold and the second mold are both provided with annular equidistantly distributed positioning grooves, and the outer sides of the first mold and the second mold of another cylindrical mold are both fixedly connected with annular equidistantly distributed positioning blocks, and the positioning blocks are snap-fitted and connected to the inside of the positioning grooves.

[0016] Preferably, the end of the first mold away from the positioning block is fixedly connected to a cover plate, and the end of the cover plate away from the first mold is fixedly connected to a bracket, and the bracket is internally threaded with a screw, and the screw extends into the first mold, and at the same time, a nut is fixedly connected to the outer side of the end of the screw away from the first mold.

[0017] Preferably, an adjustable forming die for special-shaped concrete pipe piles is disclosed, and a concrete pipe pile forming method is disclosed, and the specific method steps are as follows:

[0018] S1: First, the connection block and the installation block are separated by bolts, and then the rotating plate is rotated to separate it from the fixed plate, thereby forming a sleeve structure. The first mold and the second mold are the core parts of the cylindrical mold. In the open state, they can be disassembled or assembled respectively. The steel cage is placed inside the first mold and filled with a certain proportion of concrete. After the preparation work is completed, the second mold is fitted with the first mold and fixed in the fixing hole by bolts to form a complete cylindrical mold;

[0019] S2: After the cylindrical mold is closed, the rotating motor installed on the top of the rotating plate is started. The motor drives the belt and the pulley to transmit power, thereby driving the rotating shaft to rotate. The outer side of the rotating shaft is connected to a driving wheel. When the driving wheel contacts the driving ring on the outer side of the cylindrical mold, the cylindrical mold will be driven to rotate around the supporting axis of the fixed seat and the slide bar. During the rotation process, the concrete inside the cylindrical mold is subjected to the centrifugal force and will be evenly distributed on the inner wall of the cylindrical mold, and finally formed into the required concrete pipe pile;

[0020] S3: The fixed seat and the slide bar are matched with the slide bar inside the base slide slot through the mounting seat. The slide bar is driven by a screw rod, and the screw rod realizes the rotation and sliding linkage through the transmission bevel gear output by the double-axis motor. When the screw rod rotates, it will drive the slide bar to slide along the slide slot, thereby adjusting the distance between the cylindrical mold on the top of the slide bar and the cylindrical mold on the top of the fixed seat. In this way, cylindrical molds of different lengths can be combined and spliced ​​to form a longer mold to meet the processing requirements of concrete pipe piles of different specifications;

[0021] S4: After the steel bar is installed inside the first mold, the nut on the cover plate is turned to drive the screw to rotate, thereby controlling the extension length of the screw inside the first mold. The end of the screw contacts the steel bar inside the mold, and the tension of the steel bar can be adjusted to keep the steel bar at an appropriate tightness, ensuring that the strength of the concrete pipe pile after forming meets the requirements;

[0022] S5: When two cylindrical molds need to be used for processing at the same time, the ends of the two sections of the molds are accurately aligned through the engagement connection of the positioning groove and the positioning block. The slider drives the top cylindrical mold to move and fit to the top cylindrical mold of the fixed seat. During the rotation process, due to the close contact between the driving wheel and the driving ring, the two cylindrical molds are ensured to run consistently during the rotation process to avoid deviation.

[0023] S6: During the rotation of the cylindrical mold, concrete is gradually formed on the inner wall of the mold. When the concrete is completely hardened, the bolts of the connecting block and the mounting block can be loosened again, the mold can be opened, and the formed concrete pipe pile can be taken out. If the concrete pipe pile needs to be further extended, just repeat the above operation and splice and extend multiple molds to meet production needs.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The invention discloses an adjustable forming mold for special-shaped concrete pipe piles and a forming method for concrete pipe piles. By designing a combined structure of a slide groove, a slide bar and a screw rod on the top of a base, the distance between the cylindrical molds can be flexibly adjusted. A dual-axis motor drives the screw rod to rotate, driving the slide bar to slide smoothly in a linear direction, thereby realizing precise displacement adjustment between the molds. Through the modular splicing design of the first mold and the second mold, additional mold components can be added according to actual needs to extend the length of the cylindrical mold to meet the processing needs of concrete pipe piles of different specifications.

[0026] A rotating motor is installed on the top of the rotating plate. The power is transmitted to the drive ring on the outside of the cylindrical mold through the linkage design of the pulley and the rotating shaft. During the rotation process, the concrete inside the cylindrical mold is subjected to the centrifugal force and can be evenly distributed along the inner wall of the mold, greatly reducing the accumulation or segregation of mortar. The driving wheel and the driving ring cooperate closely to provide stable support for the cylindrical mold during the rotation of the mold, further improving the uniformity of concrete distribution. When the dual molds are in cooperative operation, the positioning groove and the positioning block are precisely engaged to ensure the consistency of the two molds during the rotation process, preventing quality problems caused by mold misalignment.

[0027] The first mold and the second mold are connected through fixing holes and bolts, which can be easily assembled and disassembled. The mold can be quickly opened by removing the bolts between the connection block and the mounting block. After the mold is disassembled, it is convenient to place the steel cage inside the first mold and fill it with concrete. When the filling is completed, the second mold is assembled again to form a closed cylindrical mold, ready to enter the rotational molding process. After the molding is completed, the mold can also be quickly disassembled to clean the internal residue and take out the finished product. This design not only simplifies the mold maintenance process, but also improves the operation efficiency of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the opening structure of the rotating plate of the present invention;

[0030] Figure 3 This is a schematic diagram of the first mold structure of the present invention;

[0031] Figure 4 This is a schematic diagram of the second mold structure of the present invention;

[0032] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0033] Figure 6 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0034] Figure 7 It is a schematic diagram of the structure of the rotating plate of the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of the mounting plate of the present invention;

[0036] Fig. 9 This is a schematic diagram of the explosion structure of the base of the present invention;

[0037] Fig.10 It is a schematic diagram of the screw rod structure of the present invention;

[0038] Fig.11 It is a schematic diagram of the dual-axis motor structure of the present invention.

[0039] In the figure: 1. base; 2. fixed seat; 3. slide bar; 4. mounting plate; 5. fixed plate; 6. rotating plate; 7. connecting block; 8. mounting block; 9. rotating shaft; 10. driving wheel; 11. rotating motor; 12. slide groove; 13. screw rod; 14. transmission bevel gear; 15. dual-axis motor; 16. first mold; 17. second mold; 18. reinforcement ring; 19. driving ring; 20. fixing hole; 21. positioning groove; 22. positioning block; 23. cover plate; 24. screw rod; 25. nut. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of 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 of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Example 1: Please refer to Figure 1 - Fig.11The present invention provides the following technical scheme: an adjustable forming mold for special-shaped concrete pipe piles, comprising a base 1, a symmetrically distributed fixed seat 2 is fixedly connected to the top of the base 1, and an adjustment structure is installed at one end of the top of the base 1 away from the fixed seat 2; the adjustment structure comprises a slide bar 3 slidably connected to the top of the base 1, and the slide bar 3 is provided with two and aligned with the fixed seat 2, the two fixed seats 2 and the slide bar 3 are fixedly connected to the top of the mounting plate 4, and the other fixed seat 2 and the slide bar 3 are fixedly connected to the top of the fixing plate 5, the top of the mounting plate 4 is rotatably connected to a rotating plate 6, and the end of the rotating plate 6 away from the mounting plate 4 is aligned with the fixed plate 5; the mounting plate 4, the fixing plate 5 and the rotating plate 6 form a sleeve structure, and a forming structure is installed inside the sleeve structure; a connecting block 7 is fixedly connected in the middle of one end of the rotating plate 6 away from the mounting plate 4, and a bolt is slidably connected inside the connecting block 7, a mounting block 8 is fixedly connected in the middle of one end of the fixed plate 5 away from the fixed seat 2 or the slide bar 3, and the bolt is threadedly connected inside the mounting block 8; the rotating plate 6 The inner top is rotatably connected to two symmetrically distributed rotating shafts 9, and the outer side of the rotating shaft 9 is fixedly connected to an equidistantly distributed driving wheel 10, the fixed seat 2 and the top of the slide bar 3 are fixedly connected to equidistantly distributed mounting seats, and the fixed seat 2 and the top of the slide bar 3 are rotatably connected to the rotating shaft 9 through the mounting seat; one end of the top of the rotating plate 6 is fixedly connected to a rotating motor 11, and the output end of the rotating motor 11 is rotatably connected to a belt, one end of the rotating shaft 9 inside the rotating plate 6 is fixedly connected to a pulley, and the pulley at the end of the rotating shaft 9 is rotatably connected On the outside of the pulley at the output end of the rotating motor 11; two symmetrically distributed slide grooves 12 are provided on the top of the base 1, and each slide groove 12 is slidably connected to the slide bar 3, and the slide groove 12 is rotatably connected to the inside of the screw rod 13, and the screw rod 13 is threadedly connected to the inside of the slide bar 3, and the end of the slide groove 12 is fixedly connected to a transmission bevel gear 14, and one end of the base 1 is fixedly connected to a dual-axis motor 15, two output ends of the dual-axis motor 15, and the two output ends of the dual-axis motor 15 are meshed with the transmission bevel gear 14 through the bevel gear.

[0042] First, take out the bolts inside the connecting block 7, and then separate the connecting block 7 and the mounting block 8 from each other. At this time, rotate the rotating plate 6 to separate the rotating plate 6 from the fixed plate 5. At this time, the top of the cylindrical mold located inside the sleeve structure formed by the mounting plate 4, the fixed plate 5 and the rotating plate 6 will be in an open state. At this time, take out the bolts on both sides of the second mold 17 from the inside of the fixing hole 20, lift the second mold 17, and separate the second mold 17 from the first mold 16. At this time, install the steel cage inside the first mold 16, and fill a certain proportion of concrete into the first mold 16. When the concrete is filled, fit the first mold 16 and the second mold 17 together, and then install the bolts on both sides of the second mold 17 inside the fixing hole 20, and then connect the first mold 16 and the second mold 17 to form a cylindrical mold.

[0043] When the material and steel bars inside the cylindrical mold are filled, the rotating plate 6 and the fixed plate 5 are connected to each other, and the bolts inside the connecting block 7 will be connected to the mounting block 8, and then the mounting plate 4, the fixed plate 5 and the rotating plate 6 are connected to each other to form a whole, and the rotating motor 11 on the top of the rotating plate 6 is started, and the belt at the output end of the rotating motor 11 drives the pulley at the end of the rotating shaft 9 to rotate, and then drives the driving wheel 10 on the outside to rotate through the rotating shaft 9, and the driving wheel 10 will rotate on the outside of the driving ring 19. During the rotation process, the driving ring 19 will drive the cylindrical mold to rotate inside the sleeve structure formed by the mounting plate 4, the fixed plate 5 and the rotating plate 6, so that the concrete inside the cylindrical mold is evenly distributed on the inside of the cylindrical mold until the concrete is formed inside the cylindrical mold to form a concrete pipe pile.

[0044] The cylindrical mold located on the top of the fixed seat 2 and the cylindrical mold on the top of the slide 3 are connected to each other, and the two cylindrical molds operate independently of each other, and can be connected to each other for cooperative operation. The cylindrical mold is extended by connecting the two cylindrical molds to each other, thereby realizing the processing of different concrete pipe piles. The two cylindrical molds are installed on the top of the fixed seat 2 and the slide 3 through the driving wheel 10 outside the rotating shaft 9. At the same time, the bevel gears at the two output ends of the dual-axis motor 15 drive the transmission bevel gear 14 to rotate, and then drive the screw rod 13 to rotate inside the slide groove 12 through the transmission bevel gear 14. Since the screw rod 13 is threadedly connected to the inside of the slide 3, when the screw rod 13 rotates, it will drive the slide 3 to slide inside the slide groove 12, thereby adjusting the distance between the cylindrical mold installed on the top of the slide 3 and the cylindrical mold installed on the top of the fixed seat 2, and the cylindrical mold is extended when the two cylindrical molds are in contact and connected with each other.

[0045] Embodiment 2: On the basis of embodiment 1, a molding structure is further disclosed, and its specific structure is as follows: the molding structure includes a first mold 16 installed on the mounting plate 4, the fixed plate 5 and the rotating plate 6 to form an internal sleeve structure, and the top of the first mold 16 is snap-connected with the second mold 17, and the first mold 16 and the second mold 17 form a cylindrical mold, the outer sides of the first mold 16 and the second mold 17 are fixedly connected with equidistantly distributed reinforcement rings 18, and the outer side of each reinforcement ring 18 is fixedly connected with a driving ring 19 at intervals, and the driving ring 19 is rotatably connected to the inner side of the driving wheel 10; both sides of the first mold 16 are provided with equidistantly distributed fixing holes 20, and both sides of the second mold 17 are installed with equidistant bolts, and the bolts penetrate the sides of the second mold 17 and are threadedly connected to the fixing holes 20, the first mold Two cylindrical molds are formed by a mold 16 and a second mold 17, and are installed on the top of the base 1, and the two cylindrical molds are respectively installed on the top of the fixed seat 2 and the top of the slide bar 3; the outer sides of one end of the first mold 16 and the second mold 17 are provided with annular equidistantly distributed positioning grooves 21, and the outer sides of one end of the first mold 16 and the second mold 17 of the other cylindrical mold are fixedly connected with annular equidistantly distributed positioning blocks 22, and the positioning blocks 22 are snap-connected to the inside of the positioning grooves 21; the end of the first mold 16 away from the positioning block 22 is fixedly connected with a cover plate 23, and the end of the cover plate 23 away from the first mold 16 is fixedly connected with a bracket, and the inside of the bracket is threadedly connected with a screw 24, and the screw 24 extends to the inside of the first mold 16, and at the same time, the end of the screw 24 away from the first mold 16 is fixedly connected with a nut 25.

[0046] When the first mold 16 and the second mold 17 are connected to each other, the ends of the driving ring 19 on the outside of the first mold 16 and the second mold 17 will contact each other, and the second mold 17 and the driving ring 19 will form an equidistantly distributed annular structure on the outside of the cylindrical mold, and the outer side of the annular structure and the driving wheel 10 are in contact with each other. During the rotation of the driving wheel 10, the driving ring 19 can be driven to rotate, and then the cylindrical mold is driven to rotate through the driving ring 19, and the driving wheel 10 located on the top of the fixed seat 2 and the slide bar 3 supports the annular structure formed by the driving ring 19, and then the cylindrical mold is installed on the top of the fixed seat 2 and the slide bar 3.

[0047] When the two cylindrical molds are in contact with each other, the positioning grooves 21 and the positioning blocks 22 located at the ends of the two cylindrical molds will contact each other. At this time, the positioning blocks 22 will be engaged with the inside of the positioning grooves 21, and the cylindrical mold on the top thereof and the cylindrical mold on the top of the fixed seat 2 are driven by the slide bar 3 to fit each other, so that the two cylindrical molds can maintain the consistency of rotation during the rotation process.

[0048] When the steel bars are installed inside the first mold 16, the screw 24 is driven to rotate in the middle of the bracket on one side of the cover plate 23 by rotating the nut 25, thereby controlling the extension length of the screw 24 inside the first mold 16. Since the screw 24 extends into the first mold 16, the screw 24 will contact the steel bars inside the first mold 16, thereby adjusting the tension of the steel bars inside the first mold 16 to a certain extent.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable forming die for a special-shaped concrete pipe pile, comprising a base (1), the top of the base (1) being fixedly connected to symmetrically distributed fixing seats (2), and an adjustment structure being installed at one end of the top of the base (1) away from the fixing seats (2); Features: The adjustment structure comprises a slide bar (3) slidably connected to the top of the base (1), and the slide bar (3) is provided with two slide bars aligned with the fixed seat (2), the tops of the two fixed seats (2) and the slide bar (3) are fixedly connected with a mounting plate (4), and the tops of the other fixed seat (2) and the slide bar (3) are fixedly connected with a fixing plate (5), the top of the mounting plate (4) is rotatably connected with a rotating plate (6), and one end of the rotating plate (6) away from the mounting plate (4) is aligned with the fixed plate (5); The mounting plate (4), the fixing plate (5) and the rotating plate (6) form a sleeve structure, and a forming structure is installed inside the sleeve structure.

2. The adjustable forming die for special-shaped concrete pipe piles according to claim 1, characterized in that: A connecting block (7) is fixedly connected in the middle of one end of the rotating plate (6) away from the mounting plate (4), and a bolt is slidably connected inside the connecting block (7); a mounting block (8) is fixedly connected in the middle of one end of the fixing plate (5) away from the fixing seat (2) or the sliding bar (3), and the bolt is threadedly connected inside the mounting block (8).

3. The adjustable forming die for special-shaped concrete pipe piles according to claim 1, characterized in that: The top of the inner side of the rotating plate (6) is rotatably connected to two symmetrically distributed rotating shafts (9), and the outer side of the rotating shaft (9) is fixedly connected to driving wheels (10) distributed at equal intervals. The tops of the fixed seat (2) and the sliding bar (3) are both fixedly connected to mounting seats distributed at equal intervals, and the fixed seat (2) and the top of the sliding bar (3) are rotatably connected via the mounting seats and the rotating shaft (9).

4. The adjustable forming die for special-shaped concrete pipe piles according to claim 3, characterized in that: One end of the top of the rotating plate (6) is fixedly connected to a rotating motor (11), and the output end of the rotating motor (11) is rotatably connected to a belt, one end of the rotating shaft (9) inside the rotating plate (6) is fixedly connected to a pulley, and the pulley at the end of the rotating shaft (9) is rotatably connected to the outer side of the pulley at the output end of the rotating motor (11).

5. The adjustable forming die for special-shaped concrete pipe piles according to claim 1, characterized in that: The top of the base (1) is provided with two symmetrically distributed slide grooves (12), and each slide groove (12) is slidably connected to the slide bar (3). The slide groove (12) is rotatably connected to a screw rod (13), and the screw rod (13) is threadedly connected to the slide bar (3). The end of the slide groove (12) is fixedly connected to a transmission bevel gear (14), and one end of the base (1) is fixedly connected to a dual-axis motor (15), and the two output ends of the dual-axis motor (15) are meshed with the transmission bevel gear (14) through the bevel gear.

6. The adjustable forming die for special-shaped concrete pipe piles according to claim 5, characterized in that: The molding structure comprises a first mold (16) installed on a mounting plate (4), a fixed plate (5) and a rotating plate (6) to form an inner sleeve structure, and the top of the first mold (16) is snap-connected with a second mold (17), and the first mold (16) and the second mold (17) form a cylindrical mold, and the outer sides of the first mold (16) and the second mold (17) are fixedly connected with equidistantly distributed reinforcement rings (18), and the outer sides of each reinforcement ring (18) are fixedly connected with a drive ring (19) at intervals, and the drive ring (19) is rotatably connected to the inner side of the drive wheel (10).

7. The adjustable forming die for special-shaped concrete pipe piles according to claim 6, characterized in that: Both sides of the first mold (16) are provided with equidistantly distributed fixing holes (20), and both sides of the second mold (17) are installed with equidistantly distributed bolts, and the bolts penetrate the sides of the second mold (17) and are threadedly connected to the fixing holes (20). The first mold (16) and the second mold (17) form a cylindrical mold, and two cylindrical molds are installed on the top of the base (1), and the two cylindrical molds are respectively installed on the top of the fixing seat (2) and the top of the sliding bar (3).

8. The adjustable forming die for special-shaped concrete pipe piles according to claim 7, characterized in that: The first mold (16) and the second mold (17) are both provided with annular equidistantly distributed positioning grooves (21) on the outer sides of one end, and the first mold (16) and the second mold (17) of the other cylindrical mold are both fixedly connected with annular equidistantly distributed positioning blocks (22) on the outer sides of one end, and the positioning blocks (22) are snap-fitted and connected to the inside of the positioning grooves (21).

9. The adjustable forming die for special-shaped concrete pipe piles according to claim 8, characterized in that: The end of the first mold (16) away from the positioning block (22) is fixedly connected to a cover plate (23), and the end of the cover plate (23) away from the first mold (16) is fixedly connected to a bracket, and the bracket is internally threadedly connected to a screw rod (24), and the screw rod (24) extends into the first mold (16), and at the same time, a nut (25) is fixedly connected to the outer side of the end of the screw rod (24) away from the first mold (16).

10. According to the adjustable forming mold for special-shaped concrete pipe piles according to claim 1, a concrete pipe pile forming method is also disclosed, and the specific method steps are as follows: S1: First, the connection block (7) and the mounting block (8) are separated by bolts, and then the rotating plate (6) is rotated to separate it from the fixed plate (5), thereby forming a sleeve structure. The first mold (16) and the second mold (17) are the core parts of the cylindrical mold. In the open state, they can be disassembled or assembled respectively. The steel cage is placed inside the first mold (16) and filled with a certain proportion of concrete. After the preparation work is completed, the second mold (17) is fitted with the first mold (16) and fixed in the fixing hole (20) by bolts to form a complete cylindrical mold; S2: After the cylindrical mold is closed, the rotating motor (11) installed on the top of the rotating plate (6) is started, and the motor drives the belt and the pulley to transmit power, thereby driving the rotating shaft (9) to rotate. The outer side of the rotating shaft (9) is connected to a driving wheel (10). When the driving wheel (10) contacts the driving ring (19) on the outer side of the cylindrical mold, it will drive the cylindrical mold to rotate around the supporting axis of the fixed seat (2) and the sliding bar (3). During the rotation process, the concrete inside the cylindrical mold is subjected to the centrifugal force and will be evenly distributed on the inner wall of the cylindrical mold, and finally formed into the required concrete pipe pile; S3: The fixed seat (2) and the slide bar (3) are both matched with the slide bar (3) inside the slide groove (12) of the mounting seat and the base (1). The slide bar (3) is driven by a screw rod (13). The screw rod (13) realizes rotation and sliding linkage through the transmission bevel gear (14) output by the double-axis motor (15). When the screw rod (13) rotates, it drives the slide bar (3) to slide along the slide groove (12), thereby adjusting the distance between the top cylindrical mold of the slide bar (3) and the top cylindrical mold of the fixed seat (2). In this way, cylindrical molds of different lengths can be combined and spliced ​​to form a longer mold to meet the processing requirements of concrete pipe piles of different specifications; S4: After the steel bar is installed inside the first mold (16), the nut (25) on the cover plate (23) is rotated to drive the screw rod (24) to rotate, thereby controlling the extension length of the screw rod (24) inside the first mold (16). The end of the screw rod (24) contacts the steel bar inside the mold, and the tension of the steel bar can be adjusted to keep the steel bar at an appropriate tightness, thereby ensuring that the strength of the concrete pipe pile after forming meets the requirements; S5: When two cylindrical molds are required to be processed simultaneously, the end portions of the two molds are ensured to be accurately aligned through the engagement connection between the positioning groove (21) and the positioning block (22), and the slide bar (3) drives the top cylindrical mold to move toward and fit the top cylindrical mold of the fixed seat (2). During the rotation process, due to the close contact between the driving wheel (10) and the driving ring (19), the two cylindrical molds are ensured to run in unison during the rotation process to avoid deviation. S6: During the rotation of the cylindrical mold, concrete is gradually formed on the inner wall of the mold. When the concrete is completely hardened, the bolts of the connecting block (7) and the mounting block (8) can be loosened again, the mold can be opened, and the formed concrete pipe pile can be taken out. If the concrete pipe pile needs to be further extended, the above operation can be repeated to splice and extend multiple molds to meet production needs.

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