Manufacturing device and method for prefabricated TRC formwork of assembly type stirrup-free TRC square column

Abstract

The invention discloses a manufacturing device and method for a prefabricated TRC formwork of an assembly type stirrup-free TRC square column. The manufacturing device comprises a left end plate, a right end plate, an outer formwork and an inner formwork. The left end plate is provided with a pouring hole, a first inner mold mounting hole, a first main rib mounting hole and an outer mold main plate positioning bolt hole; the right end plate is provided with a second inner mold mounting hole, a second main rib mounting hole and an outer mold main plate positioning bolt hole; the outer mold is composed of two corresponding square bracket-shaped outer mold main plates, and the two edges of each outer mold main plate are connected with outer mold splicing wing plates which are outward and perpendicular to the outer mold main plate respectively. The inner die comprises an inner die main plate, an inner die angle die and a main shaft. The manufacturing method comprises the steps of adjusting the inner formwork, installing the left end plate and the right end plate, installing the main reinforcements, winding the fabric net, installing the outer formwork, pouring fine aggregate concrete and removing the formwork. The quality and the bearing performance of a formwork finished product are guaranteed, and meanwhile the construction efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of prefabricated RC structure technology, specifically to a device and method for manufacturing a prefabricated TRC mold shell for a prefabricated TRC square column without stirrups. Background Technology

[0002] Reinforced concrete (RC) structures have long been widely used in the construction of buildings, bridges, and other structures due to their excellent seismic performance, durability, availability of locally sourced materials, and high cost-effectiveness. However, traditional RC structures also have inherent characteristics such as high self-weight and the ability to operate with cracks (after hardening, concrete has a large number of micro-cracks at the interface between cement paste and coarse aggregate; under structural load, some of these micro-cracks will extend and connect to form macro-cracks). Reducing the self-weight of RC structures can further improve their seismic performance, and delaying crack development can further improve their durability.

[0003] This application discloses a prefabricated, stirrup-free TRC square column that can effectively reduce the self-weight of RC columns and improve their crack resistance without compromising load-bearing capacity. The prefabricated, stirrup-free TRC square column uses TRC to construct a column "□"-shaped formwork with only main reinforcement (no stirrups), such as... Figure 10 As shown, after the formwork is transported to the construction site and hoisted into position, core concrete is poured inside the formwork to form a TRC square column.

[0004] In this type of TRC square column, the precast formwork serves as both a construction template and part of the column, meaning it is not removed after construction. At the same time, the fiber fabric mesh in the formwork replaces the stirrups in traditional RC columns to provide lateral restraint to the core concrete and main reinforcement of the column.

[0005] This type of column has the following characteristics: (1) The formwork is manufactured in the factory, with a high degree of industrialization, and the quality and precision are easily guaranteed; (2) It can save a lot of construction templates and labor; (3) The formwork is relatively light, which is convenient for transportation and hoisting, and does not require special construction equipment; (4) It does not require special construction technology, such as prestressing technology; (5) Since the lightweight, high-strength, and corrosion-resistant fiber fabric mesh is used to replace the traditional stirrups, the self-weight of the column can be effectively reduced, and the problem of reduced mechanical performance of the column due to the corrosion of the stirrups can be avoided. At the same time, the fabric mesh can also effectively improve the crack resistance of the column and improve the durability of the structure; (6) According to domestic and foreign research data, this type of structure has the same integrity and seismic performance as cast-in-place concrete components, and can overcome the shortcomings of the existing prefabricated structures in my country that are not good enough in terms of integrity and seismic performance.

[0006] The manufacture of the aforementioned TRC square column is quite difficult, mainly due to the production of the square TRC mold shell. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a device and method for manufacturing prefabricated TRC formwork shells for assembled, stirrup-free TRC square columns, which can effectively solve the problem of factory production of this type of square column TRC formwork shell.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a device for manufacturing a prefabricated TRC mold shell for an assembled TRC square column without stirrups, comprising a left end plate, a right end plate, an outer mold, and an inner mold;

[0009] The left end plate is provided with four pouring holes distributed along the four sides, a first inner mold placement hole, a number of first main reinforcement placement holes located between the pouring holes and the first inner mold placement hole and distributed around the perimeter, and a number of outer mold main board positioning bolt holes distributed around the perimeter corresponding to the outer mold main board position.

[0010] The right end plate is provided with a second inner mold mounting hole, a number of second main rib mounting holes distributed around the second inner mold mounting hole and corresponding one-to-one with the first main rib mounting holes of the left end plate, and a number of outer mold main plate positioning bolt holes distributed around the outer periphery of the outer mold main plate.

[0011] The outer mold consists of two corresponding bracket-shaped outer mold main plates. Each outer mold main plate has an outward-facing and perpendicular outer mold assembly wing plate connected to its two edges. The two outer mold main plates have several one-to-one corresponding bolt holes. The two outer mold main plates are assembled into a whole by bolts.

[0012] The inner mold includes four inner mold main plates, four inner mold corner plates, and a main shaft. Threads are provided at both ends of the main shaft within a certain length range. The left end of the main shaft is provided with a left connecting ring for the inner mold corner plates and a left connecting ring for the inner mold main plates, and the right end is provided with a right connecting ring for the inner mold corner plates and a right connecting ring for the inner mold main plates. The left connecting ring, the left connecting ring, the right connecting ring, and the right connecting ring are all threaded to the main shaft and can move left and right along the main shaft. The left and right connecting rings are connected to the inner mold corner plates via inner mold corner plate connecting rods, and the left and right connecting rings are connected to the inner mold main plates via inner mold main plate connecting rods.

[0013] Preferably, the inner mold main board has inward slopes on both sides, and a longitudinally extending inner mold main board stiffening rib is provided at the middle of its transverse direction. Each end of the stiffening rib is provided with an inner mold main board connecting hinge, and the end of the inner mold main board connecting rod away from the connecting ring is hinged to the inner mold main board connecting hinge.

[0014] Preferably, the inner mold corner mold has slopes on both sides that are adapted to the slope of the inner mold main board, and each end of the inner mold corner mold is provided with an inner mold corner mold connecting hinge. The inner mold corner mold connecting hinge is located outside the inner mold main board connecting hinge and is spaced at an appropriate distance. The end of the inner mold corner mold connecting rod away from the connecting ring is hinged to the inner mold corner mold connecting hinge.

[0015] Preferably, both the left connecting ring of the inner mold corner mold and the left connecting ring of the inner mold main board include a screwing component, a baffle, and a sliding ring; the screwing component has a threaded hole on its inner wall that is adapted to the main shaft along the axial direction, and an insertion hole is provided at its left end; the sliding ring has a hole in the middle that is adapted to the outer diameter of the screwing component and is fitted onto the screwing component, allowing the sliding ring to rotate freely, and has four symmetrically arranged hinge grooves with openings facing right around its periphery, with hinge bolts placed horizontally in the hinge grooves, forming a hinge connection with the end of the inner mold corner mold connecting rod or the inner mold main board connecting rod through the hinge grooves and hinge bolts, and the connecting rod can rotate within a 45-degree angle range to the right; the baffle is placed on both sides of the sliding ring and fixed to the screwing component, restricting the sliding ring from moving along the axial direction.

[0016] Preferably, both the right connecting ring of the inner mold corner mold and the right connecting ring of the inner mold main board include a screwing component, a baffle, and a sliding ring; the screwing component has a threaded hole on its inner wall that is adapted to the main shaft along the axial direction, and an insertion hole is provided at its left end; the sliding ring has a hole in the middle that is adapted to the outer diameter of the screwing component and is fitted onto the screwing component, allowing the sliding ring to rotate freely, and has four symmetrically arranged hinge grooves with openings facing left around its periphery, with hinge bolts placed horizontally in the hinge grooves, forming a hinge connection with the end of the inner mold corner mold connecting rod or the inner mold main board connecting rod through the hinge grooves and hinge bolts, and the connecting rod can rotate to the left within a 45-degree angle range; the baffle is placed on both sides of the sliding ring and fixed to the screwing component, restricting the sliding ring from moving along the axial direction.

[0017] Preferably, the insertion hole is used to insert a steel bolt, and the corresponding connecting ring is moved along the main shaft by turning the steel bolt to tighten the screwing member.

[0018] Preferably, the positioning bolt holes on the outer mold main board are used to fix the assembled outer mold to the left end plate and the right end plate with bolts, so as to achieve precise positioning of the outer mold and the end plate.

[0019] This invention also provides a method for manufacturing a prefabricated TRC formwork shell for an assembled, stirrup-free TRC square column, based on the aforementioned manufacturing apparatus, comprising the following steps:

[0020] S1. Inner Mold Corner Mold Shrinkage: By turning the turning component, the left and right connecting rings of the inner mold corner mold move to the sides on the main shaft respectively, causing the inner mold corner mold to shrink inward.

[0021] S2, Inner mold main board shrinkage: By turning the turning part, the left connecting ring and the right connecting ring of the inner mold main board move to both sides on the main shaft, causing the inner mold main board to shrink inward;

[0022] S3. End plate installation: Place the left end plate through its first inner mold mounting hole and the right end plate through its second inner mold mounting hole onto the two ends of the shrunken inner mold corner mold and the inner mold main plate, respectively.

[0023] S4. Inner mold main board opening and positioning: By turning the turning part, the left connecting ring and the right connecting ring of the inner mold main board are moved towards the middle on the main shaft, which drives the inner mold main board to push out and press against the inner edge of the inner mold mounting hole of the end plate. At the same time, the distance between the two end plates is adjusted to meet the design requirements.

[0024] S5. Inner mold corner mold opening and positioning: By turning the turning part, the left connecting ring and the right connecting ring of the inner mold corner mold move towards the middle on the main shaft respectively, driving the inner mold corner mold to push outward and press against the inner edge of the end plate inner mold placement hole;

[0025] S6. Main reinforcement installation: Insert the two ends of several main reinforcement bars into the main reinforcement placement holes of the left end plate and the right end plate respectively;

[0026] S7. Fabric mesh wrapping: A fabric mesh of the required number of layers is wrapped around the outer periphery of several main reinforcing bars.

[0027] S8. Outer mold installation: Join the two bracket-shaped outer mold main plates together on the outer periphery of the whole and place them between the two end plates. Screw the bolts into the bolt holes of the outer mold assembly wing plate to make the outer mold main plates form a whole. After adjusting the position of the outer mold, screw the bolts into the positioning bolt holes of the outer mold main plates on the end plates to lock the outer mold in place and form a complete mold cavity.

[0028] S9. Fine aggregate concrete pouring: Place the whole piece with the left end facing up, and pour fine aggregate concrete into the mold cavity through the four pouring holes of the left end plate.

[0029] S10. External mold removal: First, unscrew the bolts on the positioning bolt holes of the external mold main board of the end plate, then unscrew the bolts on the bolt holes of the external mold assembly wing plate, separate the two external mold main boards and remove them.

[0030] S11. Inner mold removal: First, tighten the inner mold corner mold to shrink and detach from the inner surface of the mold shell by tightening the tightening component. Then, tighten the inner mold main plate to shrink and detach from the inner surface of the mold shell by tightening the tightening component. After removing the two end plates, pull the entire inner mold out of the mold shell.

[0031] Preferably, in steps S4 and S5, when the inner mold main board and the inner mold corner mold are pushed outward, it is necessary to ensure that the side of the inner mold main board and the side of the inner mold corner mold are tightly fitted, and that the entire inner mold is in full contact with the inner edge of the inner mold mounting hole of the end plate, so as to ensure the squareness and sealing of the mold cavity.

[0032] Preferably, during the installation of the outer mold in step S8, after the two bracket-shaped outer mold main plates are joined together, it is necessary to ensure that the splicing point of the outer mold main plate corresponds to the corner position of the inner mold, and the bolts of the outer mold assembly wing plate must be tightened symmetrically to avoid deformation of the outer mold main plate due to uneven force. At the same time, the positioning bolts of the outer mold main plate of the end plate must extend a certain length from the inner side of the end plate to ensure that there is no relative displacement between the outer mold and the end plate.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] 1. This invention facilitates the promotion and application of prefabricated, stirrup-free TRC square columns. It enables the factory production of square TRC mold shells through specialized manufacturing equipment and processes, ensuring the stability of the quality, precision, and load-bearing performance of the finished mold shells.

[0035] 2. This invention simplifies the manufacturing and assembly process of TRC mold shells, while quickly forming a stable mold cavity, reducing construction difficulty, reducing reliance on special construction equipment and technology, and improving construction efficiency. Attached Figure Description

[0036] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0037] In the attached diagram:

[0038] Figure 1 This is a schematic diagram of the left end plate of the TRC mold shell manufacturing device of the present invention;

[0039] Figure 2 This is a schematic diagram of the right end plate of the TRC mold shell manufacturing device of the present invention;

[0040] Figure 3 This is a front view of the TRC mold shell manufacturing apparatus of the present invention;

[0041] Figure 4 This is a left view of the TRC mold shell manufacturing apparatus of the present invention;

[0042] Figure 5 This is a right view of the TRC mold shell manufacturing apparatus of the present invention;

[0043] Figure 6 This is a left view of the corner mold of the inner mold of the special manufacturing device of the present invention and the left connecting ring of the main board;

[0044] Figure 7 This is a front view of the corner mold of the inner mold and the left connecting ring of the main board of the special manufacturing device of the present invention;

[0045] Figure 8 This is a right view of the corner mold of the inner mold of the special manufacturing device of the present invention and the right connecting ring of the main board;

[0046] Figure 9 This is a front view of the corner mold of the inner mold of the special manufacturing device of the present invention and the right connecting ring of the main board;

[0047] Figure 10 This is a structural schematic diagram of a prefabricated, stirrup-free TRC square column mold shell;

[0048] Numbered in the figure: 1. Left end plate; 1(1) Pouring hole; 1(2) First inner mold placement hole; 1(3) First main reinforcement placement hole; 2(1) Outer mold main plate; 2(2) Outer mold assembly wing plate; 2(3) Bolt hole; 3. Main reinforcement; 4. Fabric mesh; 5(1) Inner mold main plate; 5(2) Inner mold corner mold; 5(3) Inner mold main plate stiffening rib; 5(4) Inner mold main plate connecting hinge; 5(5) Inner mold corner mold connecting hinge; 6(1) Inner mold corner 6(2) Mold connecting rod; 7. Left connecting ring of inner mold corner mold; 8. Left connecting ring of inner mold main board; 9. Main shaft; 10. Right end mold; 10(1) Second inner mold mounting hole; 10(2) Second main rib mounting hole; 11. Right connecting ring of inner mold corner mold; 12. Right connecting ring of inner mold main board; 13. Tightening component; 13(1) Insertion hole; 14. Baffle; 15. Sliding ring; 16. Hinge groove; 17. Hinge bolt; 18. Positioning bolt hole of outer mold main board. Detailed Implementation

[0049] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0050] Example: Figures 1-5 As shown, a device for manufacturing a prefabricated TRC mold shell for an assembled TRC square column without stirrups includes a left end plate 1, a right end plate, an outer mold, and an inner mold.

[0051] The left end plate 1 has four casting holes 1 (1) distributed along the four sides and a first inner mold placement hole 1 (2), as well as a number of first main reinforcement placement holes 1 (3) distributed around the perimeter between the casting holes 1 (1) and the first inner mold placement hole 1 (2), and a number of outer mold main plate positioning bolt holes 18 distributed around the perimeter corresponding to the outer mold main plate position.

[0052] The right end plate has a second inner mold mounting hole 10 (1) and a number of second main reinforcement mounting holes 10 (2) distributed around the second inner mold mounting hole 10 (1) and corresponding one-to-one with the first main reinforcement mounting hole 1 (3) on the left end plate, as well as a number of outer mold main plate positioning bolt holes 18 distributed around the outer periphery of the outer mold main plate.

[0053] The outer mold consists of two corresponding “[”-shaped outer mold main plates 2(1). Each outer mold main plate 2(1) has two edges connected to outward-facing outer mold assembly wing plates 2(2) perpendicular to it. The assembly wing plates 2(2) on the two outer mold main plates 2(1) have several corresponding bolt holes 2(3). The two outer mold main plates 2(1) can be assembled into a whole by bolts.

[0054] The inner mold includes four inner mold main plates 5(1), four inner mold corner plates 5(2), and a main shaft 9. The inner mold main plates 5(1) have inward slopes on both sides, and a longitudinally extending inner mold main plate stiffening rib 5(3) is placed at the middle of its transverse direction. Each end of the stiffening rib 5(3) is provided with an inner mold main plate connecting hinge 5(4). The inner mold corner plates 5(2) have slopes on both sides that are adapted to the slopes of the inner mold main plates 5(1), and each end of them is provided with an inner mold corner plate connecting hinge 5(5). The connecting hinges 5(5) are located outside the connecting hinges 5(4) and are spaced at a suitable distance. The main shaft 9 has threads within a certain length range at both ends. The left end of the main shaft is provided with an inner mold corner plate left connecting ring 7 and an inner mold main plate left connecting ring 8, and the right end of the main shaft is provided with an inner mold corner plate right connecting ring 11 and an inner mold main plate right connecting ring 12. The inner mold corner mold left connecting ring 7, inner mold main board left connecting ring 8, inner mold corner mold right connecting ring 11, and inner mold main board right connecting ring 12 are all threadedly connected to the main shaft 9 and can move left and right on the main shaft 9 by screwing. The inner mold corner mold left connecting ring 7 and inner mold corner mold right connecting ring 11 are connected to the inner mold corner mold 5 (2) through the inner mold corner mold connecting rod 6 (1). One end of the connecting rod 6 (1) is hinged to the left connecting ring 7 or the right connecting ring 11, and the other end is connected to the inner mold corner mold connecting hinge 5 (5) at the corresponding end. The inner mold main board left connecting ring 8 and inner mold main board right connecting ring 12 are connected to the inner mold main board 5 (1) through the inner mold main board connecting rod 6 (2). One end of the connecting rod 6 (2) is hinged to the left connecting ring 8 or the right connecting ring 12, and the other end is connected to the inner mold main board connecting hinge 5 (4) at the corresponding end.

[0055] like Figure 6 and Figure 7 As shown, the left connecting ring 7 of the inner mold corner mold and the left connecting ring 8 of the inner mold main board include a screwing member 13, a baffle 14, and a sliding ring 15. The screwing member 13 has a threaded hole on its inner wall that is adapted to the main shaft 9 along its axial direction, so that it can be screwed onto the main shaft 9. An insertion hole 13(1) is provided at a suitable position at its left end, so that it can be screwed by inserting a bolt. The sliding ring 15 is characterized in that it has a hole in the middle that is adapted to the outer diameter of the screwing member 13, through which it can be fitted onto the screwing member 13 and can rotate freely. It has four symmetrically arranged hinge grooves 16 with openings facing to the right around its periphery. A hinge bolt 17 is horizontally placed in the hinge groove 16. The hinge groove 16 and the hinge bolt 17 form a hinge with the end of the inner mold corner mold connecting rod 6(1) or the inner mold main board connecting rod 6(2), and the connecting rod can rotate to the right within a 45-degree angle range. The baffle 14 is placed on both sides of the sliding ring 15 and fixed to the rotating member 13, which can restrict the sliding ring 15 from moving axially.

[0056] like Figure 8 and Figure 9As shown, the inner mold corner mold right connecting ring 11 and the inner mold main board right connecting ring 12 include a screwing member 13, a baffle 14, and a sliding ring 15. The screwing member 13 has a threaded hole on its inner wall that is adapted to the main shaft 9 along its axial direction, so that it can be screwed onto the main shaft 9. An insertion hole 13(1) is provided at a suitable position at its left end, so that it can be screwed by inserting a bolt. The sliding ring 15 is characterized in that it has a hole in the middle that is adapted to the outer diameter of the screwing member 13, through which it can be fitted onto the screwing member 13 and can rotate freely. It has four symmetrically arranged hinge grooves 16 with openings facing left around its periphery. A hinge bolt 17 is horizontally placed in the hinge groove 16. The hinge groove 16 and the hinge bolt 17 form a hinge with the end of the inner mold corner mold connecting rod 6(1) or the inner mold main board connecting rod 6(2), and the connecting rod can rotate to the left within a range of 45 degrees. The baffle 14 is placed on both sides of the sliding ring 15 and fixed to the rotating member 13, which can restrict the sliding ring 15 from moving axially.

[0057] This invention also provides a method for manufacturing a prefabricated TRC formwork shell for an assembled, stirrup-free TRC square column, comprising the following steps:

[0058] S1: By turning the turning part 13, the left connecting ring 7 and the right connecting ring 11 of the inner mold corner mold move to the left and right respectively on the main shaft 9. During the movement, since the connecting rings 7 and 11 are connected to the inner mold corner mold 5 (2) through the inner mold corner mold connecting rod 6 (1), the inner mold corner mold 5 (2) can be made to shrink inward.

[0059] S2: By turning the screwing part 13, the left connecting ring 8 and the right connecting ring 12 of the inner mold main board are moved to the left and right respectively on the main shaft 9. During the movement, since the connecting rings 8 and 12 are connected to the inner mold main board 5 (1) through the inner mold main board connecting rod 6 (2), the inner mold main board 5 (1) can be made to retract inward.

[0060] S3: Place the left end plate through the first inner mold mounting hole 1 (2) on it and the right end plate through the second inner mold mounting hole 10 (1) on it onto the left and right ends of the shrunken inner mold corner mold 5 (2) and inner mold main plate 5 (1), respectively.

[0061] S4: By turning the screwing part 13, the left connecting ring 8 and the right connecting ring 12 of the inner mold main board are moved to the right and left respectively on the main shaft 9, so that the inner mold main board 5 (1) is pushed out and pressed against the inner edge of the first inner mold mounting hole 1 (2) and the second inner mold mounting hole 10 (1). During this process, the distance between the left end plate and the right end plate is adjusted to conform to the design length of the column.

[0062] S5: By turning the turning part 13, the left connecting ring 7 and the right connecting ring 11 of the inner mold corner mold move to the right and left respectively on the main shaft 9, so that the inner mold corner mold 5 (2) is pushed outward and pressed against the inner edge of the first inner mold mounting hole 1 (2) and the second inner mold mounting hole 10 (1);

[0063] S6: Pass the two ends of several main reinforcement bars 3 through the first main reinforcement placement hole 1 (3) and the second main reinforcement placement hole 10 (2) respectively;

[0064] S7: Several layers of fabric mesh 4, determined by design requirements, are wrapped around the outer periphery of several main reinforcing bars 3;

[0065] S8: Outer mold installation. The two bracket-shaped outer mold main plates are joined together between the outer periphery, left end plate and right end plate of the above-mentioned whole, and bolts are screwed into the bolt holes 2 (3) of the outer mold assembly wing plate 2 (2) to make it into a whole. Then the position of the whole is adjusted so that the lateral positions of its two ends are located inside the several outer mold main plate positioning bolt holes 18 on the left end plate and the right end plate. Finally, bolts with a length that extends a certain length from the inner side of the left end plate and the right end plate are screwed into the outer mold main plate positioning bolt holes 18 to lock it in place and form a whole.

[0066] S9: Pour fine aggregate concrete. Place the final completed part from step 8 with its left end facing up, and pour fine aggregate concrete into the cavity formed by the outer mold main plate 2 (1) and the inner mold main plate 5 (1) through the four pouring holes 1 (1);

[0067] S10: Remove the outer template. First, unscrew all the bolts on the positioning bolt holes 18 of the outer template main body, and then unscrew the bolts on the bolt holes 2(3) of the outer template assembly wing plate 2(2) to separate and remove the two “[” shaped outer template main bodies;

[0068] S11: Remove the inner mold plate. First, by turning the screwing part 13, the left connecting ring 7 and the right connecting ring 11 of the inner mold corner mold move to the left and right respectively on the main shaft 9, so that the inner mold corner mold 5(2) retracts inward and separates from the inner surface of the “□” shaped TRC mold shell. Then, by turning the screwing part 13, the left connecting ring 8 and the right connecting ring 12 of the inner mold main board move to the left and right respectively on the main shaft 9, so that the inner mold main board 5(1) retracts inward and separates from the inner surface of the “□” shaped TRC mold shell. Then, remove the left end plate and the right end plate. Finally, pull the entire inner mold out of the “□” shaped TRC mold shell.

[0069] The fabrication device and method for prefabricated TRC square column shells without stirrups have several advantages. First, the inner mold shrinks and expands by controlling the screwing mechanism, and the outer mold is assembled with bolts and positioned by the end plate. This allows for quick assembly, disassembly, and mold cavity formation without complex tools, greatly simplifying the operation, reducing difficulty, and improving production efficiency. Second, the inner mold components fit tightly after expansion, and the outer mold and end plate are precisely positioned, ensuring a square and sealed mold cavity to avoid casting defects. At the same time, the main reinforcement is precisely fixed without stirrups, and the fabric mesh and concrete are molded together, effectively improving the quality and load-bearing capacity of the finished shell.

[0070] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for manufacturing a prefabricated TRC mold shell for an assembled, stirrup-free TRC square column, characterized in that: Includes the left end plate, right end plate, outer mold, and inner mold; The left end plate is provided with four pouring holes distributed along the four sides, a first inner mold placement hole, a number of first main reinforcement placement holes located between the pouring holes and the first inner mold placement hole and distributed around the perimeter, and a number of outer mold main board positioning bolt holes distributed around the perimeter corresponding to the outer mold main board position. The right end plate is provided with a second inner mold mounting hole, a number of second main rib mounting holes distributed around the inner mold mounting hole and corresponding one-to-one with the first main rib mounting holes of the left end plate, and a number of outer mold main plate positioning bolt holes distributed around the outer periphery of the outer mold main plate. The outer mold consists of two corresponding bracket-shaped outer mold main plates. Each outer mold main plate has an outward-facing and perpendicular outer mold assembly wing plate connected to its two edges. The two outer mold main plates have several one-to-one corresponding bolt holes. The two outer mold main plates are assembled into a whole by bolts. The inner mold includes four inner mold main plates, four inner mold corner plates, and a main shaft. Threads are provided at both ends of the main shaft within a certain length range. The left end of the main shaft is provided with a left connecting ring for the inner mold corner plates and a left connecting ring for the inner mold main plates, and the right end is provided with a right connecting ring for the inner mold corner plates and a right connecting ring for the inner mold main plates. The left connecting ring, the left connecting ring, the right connecting ring, and the right connecting ring are all threaded to the main shaft and can move left and right along the main shaft. The left and right connecting rings are connected to the inner mold corner plates via inner mold corner plate connecting rods, and the left and right connecting rings are connected to the inner mold main plates via inner mold main plate connecting rods.

2. The fabrication device for a prefabricated TRC mold shell for an assembled, stirrup-free TRC square column according to claim 1, characterized in that: The inner mold main board has inward slopes on both sides, and a longitudinally extending inner mold main board stiffening rib is provided at the middle of its transverse direction. Each end of the stiffening rib is provided with an inner mold main board connecting hinge, and the end of the inner mold main board connecting rod away from the connecting ring is hinged to the inner mold main board connecting hinge.

3. The fabrication device for a prefabricated TRC mold shell for an assembled, stirrup-free TRC square column according to claim 1, characterized in that: The inner mold corner mold has slopes on both sides that are adapted to the slope of the inner mold main board. Each end of the inner mold corner mold is provided with an inner mold corner mold connecting hinge. The inner mold corner mold connecting hinge is located outside the inner mold main board connecting hinge and is separated by an appropriate distance. The end of the inner mold corner mold connecting rod away from the connecting ring is hinged to the inner mold corner mold connecting hinge.

4. The fabrication device for a prefabricated TRC mold shell for an assembled, stirrup-free TRC square column according to claim 1, characterized in that: Both the left connecting ring of the inner mold corner mold and the left connecting ring of the inner mold main board include a screwing component, a baffle, and a sliding ring. The screwing component has a threaded hole on its inner wall that is adapted to the main shaft along the axial direction, and an insertion hole is provided at its left end. The sliding ring has a hole in the middle that is adapted to the outer diameter of the screwing component and is fitted onto the screwing component. The sliding ring can rotate freely. It has four symmetrically arranged hinge grooves with openings facing the right around its periphery. A hinge bolt is placed horizontally in the hinge groove. The hinge groove and the hinge bolt form a hinge connection with the end of the connecting rod of the inner mold corner mold or the connecting rod of the inner mold main board, and the connecting rod can rotate within a 45-degree angle range to the right. The baffle is placed on both sides of the sliding ring and fixed to the screwing component to restrict the axial movement of the sliding ring.

5. The fabrication device for a prefabricated TRC mold shell for an assembled, stirrup-free TRC square column according to claim 1, characterized in that: Both the right connecting ring of the inner mold corner mold and the right connecting ring of the inner mold main board include a screwing component, a baffle, and a sliding ring. The screwing component has a threaded hole on its inner wall that is adapted to the main shaft along the axial direction, and an insertion hole is provided at its left end. The sliding ring has a hole in the middle that is adapted to the outer diameter of the screwing component and is fitted onto the screwing component. The sliding ring can rotate freely. It has four symmetrically arranged hinge grooves with openings facing left around its periphery. A hinge bolt is placed horizontally in the hinge groove. The hinge bolt and the hinge groove form a hinge connection with the end of the connecting rod of the inner mold corner mold or the connecting rod of the inner mold main board, and the connecting rod can rotate to the left within a 45-degree angle range. The baffle is placed on both sides of the sliding ring and fixed to the screwing component to restrict the axial movement of the sliding ring.

6. The fabrication device for a prefabricated TRC mold shell for an assembled, stirrup-free TRC square column according to claim 5, characterized in that: The socket is used to insert a steel bolt, and the corresponding connecting ring is moved along the main shaft by turning the steel bolt to tighten the screw.

7. The fabrication device for a prefabricated TRC mold shell for an assembled, stirrup-free TRC square column according to claim 1, characterized in that: The positioning bolt holes on the outer mold main board are used to fix the assembled outer mold to the left and right end plates with bolts, so as to achieve precise positioning of the outer mold and the end plates.

8. A method for manufacturing a prefabricated TRC formwork shell for an assembled, stirrup-free TRC square column, based on the manufacturing apparatus described in claim 1, characterized in that, Includes the following steps: S1. Inner Mold Corner Mold Shrinkage: By turning the turning component, the left and right connecting rings of the inner mold corner mold move to the sides on the main shaft respectively, causing the inner mold corner mold to shrink inward. S2, Inner mold main board shrinkage: By turning the turning part, the left connecting ring and the right connecting ring of the inner mold main board move to both sides on the main shaft, causing the inner mold main board to shrink inward; S3. End plate installation: Place the left end plate through its first inner mold mounting hole and the right end plate through its second inner mold mounting hole onto the two ends of the shrunken inner mold corner mold and the inner mold main plate, respectively. S4. Inner mold main board opening and positioning: By turning the turning part, the left connecting ring and the right connecting ring of the inner mold main board are moved towards the middle on the main shaft, which drives the inner mold main board to push out and press against the inner edge of the inner mold mounting hole of the end plate. At the same time, the distance between the two end plates is adjusted to meet the design requirements. S5. Inner mold corner mold opening and positioning: By turning the turning part, the left connecting ring and the right connecting ring of the inner mold corner mold move towards the middle on the main shaft respectively, driving the inner mold corner mold to push outward and press against the inner edge of the end plate inner mold placement hole; S6. Main reinforcement installation: Insert the two ends of several main reinforcement bars into the main reinforcement placement holes of the left end plate and the right end plate respectively; S7. Fabric mesh wrapping: A fabric mesh of the required number of layers is wrapped around the outer periphery of several main reinforcing bars. S8. Outer mold installation: Join the two bracket-shaped outer mold main plates together on the outer periphery of the whole and place them between the two end plates. Screw the bolts into the bolt holes of the outer mold assembly wing plate to make the outer mold main plates form a whole. After adjusting the position of the outer mold, screw the bolts into the positioning bolt holes of the outer mold main plates on the end plates to lock the outer mold in place and form a complete mold cavity. S9. Fine aggregate concrete pouring: Place the whole piece with the left end facing up, and pour fine aggregate concrete into the mold cavity through the four pouring holes of the left end plate. S10. External mold removal: First, unscrew the bolts on the positioning bolt holes of the external mold main board of the end plate, then unscrew the bolts on the bolt holes of the external mold assembly wing plate, separate the two external mold main boards and remove them. S11. Inner mold removal: First, tighten the inner mold corner mold to shrink and detach from the inner surface of the mold shell by tightening the tightening component. Then, tighten the inner mold main plate to shrink and detach from the inner surface of the mold shell by tightening the tightening component. After removing the two end plates, pull the entire inner mold out of the mold shell.

9. A method for manufacturing a prefabricated TRC formwork shell for an assembled, stirrup-free TRC square column according to claim 8, characterized in that: In steps S4 and S5, when the inner mold main board and the inner mold corner mold are pushed outward, it is necessary to ensure that the side of the inner mold main board and the side of the inner mold corner mold are tightly fitted, and that the entire inner mold is in full contact with the inner edge of the inner mold mounting hole of the end plate, so as to ensure the squareness and sealing of the mold cavity.

10. A method for manufacturing a prefabricated TRC formwork shell for an assembled, stirrup-free TRC square column according to claim 8, characterized in that: When installing the outer mold in step S8, after the two bracket-shaped outer mold main boards are joined together, it is necessary to ensure that the splicing point of the outer mold main board corresponds to the corner position of the inner mold, and the bolts of the outer mold assembly wing plate must be tightened symmetrically. At the same time, the positioning bolts of the outer mold main board of the end plate must extend a certain length from the inner side of the end plate to ensure that there is no relative displacement between the outer mold and the end plate.

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