A pre-tensioning method prestressed precast beam mold

Abstract

The utility model belongs to the production technology field of fabricated building component, concretely relates to a pre-tensioning method prestress prefabricated beam mould, and fixed stress seat fixedly arranged at the top of base, the side of base is set with the sliding slot along the width direction of base, and the top of sliding slot is through the top of base, and the bottom of movable stress seat is provided with sliding block no.

Description

Technical Field

[0001] This utility model belongs to the field of prefabricated building component production technology, specifically relating to a prestressed precast beam mold using the pre-tensioning method. Background Technology

[0002] With the advancement of urbanization and the continuous increase in investment in infrastructure construction in my country, the market demand for prestressed concrete production molds will continue to grow. Among them, pre-tensioned prestressed beams, with their excellent durability, good economy, and high construction efficiency, have great potential in promoting building industrialization and developing green buildings. However, the production molds for pre-tensioned prestressed beams need to consider the longitudinal load-bearing capacity, and the mold requirements vary for different construction projects. Traditional pier-type reinforced concrete platform molds are expensive and their fixed location limits their flexibility. While movable platform molds can be moved to different locations, they are only suitable for precast beams with a single cross-sectional size, resulting in low versatility. Different molds need to be produced for precast beams with different cross-sectional sizes, leading to higher costs. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a prestressed precast beam mold that can flexibly adapt to the production requirements of various engineering projects and has a lower changeover cost.

[0004] This utility model includes a base, a fixed force-bearing seat, a movable force-bearing seat, and side plates, as well as pads and / or shims. The fixed force-bearing seat is fixedly mounted on the top of the base. A groove is formed on the side of the base along its width, and the top of the groove extends through the top of the base. A sliding block is provided at the bottom of the movable force-bearing seat to cooperate with the groove, so that the movable force-bearing seat can be movably mounted on the top of the base. A strip-shaped hole is formed at the top of the movable force-bearing seat, and the lower end of the strip-shaped hole extends through the side of the sliding block. A radially movable rod is inserted through the strip-shaped hole. A locking block facing the opening is provided at the lower end of the movable rod, and a locking element for fixing the position of the movable rod is provided at the upper end of the movable rod. The side plates are arranged on the sides of the fixed force-bearing seat and the movable force-bearing seat to form the side of the precast beam. The pads and / or shims are arranged on the top of the base and located between two adjacent side plates along the width of the base.

[0005] Furthermore, it also includes a movable plate, the bottom of which is provided with a sliding block two that cooperates with the slide groove, so that the movable plate is movably set on the top of the base and located between the fixed force-bearing seat and the movable force-bearing seat. The side plate is used to be arranged on the side of the fixed force-bearing seat, the movable force-bearing seat and the movable plate to form the side of the precast beam.

[0006] Furthermore, both sides of the base are provided with sliding grooves along the width direction of the base. There are two movable force-bearing seats and two movable plates. The fixed force-bearing seat is centrally located at the top of the base and between the two movable force-bearing seats. The two movable plates are correspondingly located between the fixed force-bearing seat and the two movable force-bearing seats.

[0007] Furthermore, the locking element is a locking nut, and the upper side of the moving rod is provided with threads, and the locking nut is connected to the upper end of the moving rod by the threads.

[0008] Furthermore, the shapes of the groove, sliding block one, and sliding block two are all inverted T-shaped.

[0009] Furthermore, the locking block is a wedge-shaped block, the opening penetrates the side of the vertical portion of the sliding block, and there is a gap between the horizontal portion of the sliding block and the inner top surface of the groove for the locking block to be inserted.

[0010] Furthermore, the number of sliding grooves on one side of the base, sliding block one at the bottom of a single movable force-bearing seat, and sliding block two at the bottom of a single movable plate are all at least two.

[0011] Furthermore, both the fixed and movable support seats are steel box structures, and are internally supported by steel pipe concrete columns.

[0012] Furthermore, the bottom of the base is provided with several leveling support structures.

[0013] Furthermore, the fixed force-bearing seat, the movable force-bearing seat, and the base are of the same length, and both ends of the fixed force-bearing seat, the movable force-bearing seat, and the base are provided with connecting plates, and the connecting plates are provided with connecting holes.

[0014] The beneficial effects of this utility model are that it can adjust the position of the movable force-bearing seat in the width direction of the base to adapt to the production of precast beams with different cross-sectional widths. By replacing the side plates, it can meet the production of precast beams with different side shapes. By stacking the pads and / or plates, it can adapt to the production of precast beams with different cross-sectional heights. This greatly improves the applicability of the mold. For the production of precast beams with different cross-sectional dimensions, it is only necessary to adjust the position of the movable force-bearing seat, replace the side plates of the corresponding shape, and stack different numbers of pads and / or plates. It can flexibly adapt to the production of precast beams with various engineering project requirements, and the changeover cost is lower. The slide is directly set on the base, eliminating the need for slide rails or other structures on the base surface. This ensures that the movable force-bearing seat can move, and the base surface is free of guide rails or other protrusions, making it easier to lay pads and / or plates. Based on the setting of structures such as the moving rod and locking block, the movable force-bearing seat can remain in a fixed position during prestressing tensioning and concrete pouring, and does not occupy the space above the precast beam forming area, which facilitates the hoisting of the formed precast beam. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the prestressed precast beam mold of the present invention.

[0016] Figure 2 This is a schematic diagram of the end of the prestressed precast beam mold of the present invention.

[0017] Figure 3 This is a schematic diagram of the structure of the base of this utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the movable force-bearing seat of this utility model.

[0019] Figure 5 This is a schematic diagram of the structure of the movable plate of this utility model.

[0020] Figure 6 This is a schematic diagram showing the cooperation between the movable force-bearing seat and the base of this utility model.

[0021] Figure 7 This is a schematic diagram illustrating the combined use of prestressed precast beam molds for the pre-tensioning method of this utility model.

[0022] In the diagram: 1. Base; 11. Slide groove; 2. Fixed support seat; 3. Movable support seat; 31. Sliding block one; 32. Strip hole; 33. Opening; 34. Moving rod; 35. Locking block; 36. Locking element; 4. Side plate; 5. Movable plate; 52. Sliding block two; 6. Pad; 7. Pad plate; 8. Leveling support structure; 9. Connecting plate; 91. Connecting hole. Detailed Implementation

[0023] like Figures 1-7 As shown, this utility model provides a prestressed precast beam mold using the pre-tensioning method, including a base 1, a fixed support seat 2, a movable support seat 3, a side plate 4, and also a pad 6 and / or a pad 7. The fixed support seat 2 is fixedly mounted on the top of the base 1. A groove 11 is provided on the side of the base 1, the length of which extends along the width of the base 1, and the top of which penetrates the top of the base 1. A sliding block 31 is provided at the bottom of the movable support seat 3, which cooperates with the groove 11 to allow the movable support seat 3 to be movably mounted on the top of the base 1. The movable support seat 3 is movable in the width direction of the base 1, thereby adjusting the distance between the movable support seat 3 and the fixed support seat 2. A strip-shaped hole 32 is provided at the top of the movable support seat 3, and the lower end of the strip-shaped hole 32 penetrates the side of the sliding block 31 through an opening 33. A moving rod 34 passes through the strip-shaped hole 32. Based on the shape of the strip-shaped hole 32, the moving rod 34 can move radially, thus adjusting the distance between the movable support seat 3 and the fixed support seat 2. Figure 6Lateral movement is possible from a visual perspective. A locking block 35 is provided at the lower end of the moving rod 34, facing the opening 33. The moving rod 34 moves the locking block 35, allowing it to extend or retract along the opening 33. When the locking block 35 extends a certain length, it abuts against the inner wall of the slide groove 11. A locking element 36 is provided at the upper end of the moving rod 34 to fix its position after movement. The side plate 4 is arranged on the sides of the fixed force-bearing seat 2 and the movable force-bearing seat 3 to form the side of the precast beam. The pad 6 and / or pad 7 are arranged on the top of the base 1 and located between two adjacent side plates 4 along the width direction of the base 1.

[0024] Based on the above settings, by adjusting the position of the movable support seat 3 in the width direction of the base 1, the production of precast beams with different cross-sectional widths can be accommodated. By replacing the side plates 4, the production of precast beams with different side shapes can be met. By stacking the pads 6 and / or pads 7, the production of precast beams with different cross-sectional heights can be accommodated. This greatly expands the applicability of the mold. For the production of precast beams with different cross-sectional dimensions, it is only necessary to adjust the position of the movable support seat 3, replace the side plates 4 with the corresponding shapes, and stack different numbers of pads 6 and / or pads 7. This allows for flexible adaptation to the production of precast beams required by various engineering projects, and the changeover cost is lower. By directly setting the slide 11 on the base 1, there is no need to set slide rails or other structures on the surface of the base 1. While ensuring the movable support seat 3 can move, the surface of the base 1 is free of guide rails or other protrusions, making it easier to lay the pads 6 and / or pads 7. The movable rod 34, locking block 35 and other structures enable the movable force-bearing seat 3 to remain in a fixed position during prestressing tensioning and concrete pouring, and it does not occupy the space above the precast beam forming area, which facilitates the hoisting of the precast beam after it has been formed.

[0025] This utility model also includes a movable plate 5, the bottom of which is provided with a sliding block 52 that cooperates with the slide groove 11, so that the movable plate 5 is movably disposed on the top of the base 1 and located between the fixed force-bearing seat 2 and the movable force-bearing seat 3. The side plate 4 is used to be arranged on the side of the fixed force-bearing seat 2, the movable force-bearing seat 3 and the movable plate 5 to form the side of the precast beam. The movable plate 5 can form more partitioned sections, and when producing precast beams with small cross-sectional width dimensions, more precast beams can be produced in a single batch, thereby improving production efficiency.

[0026] The side plate 4 can be directly rested against the side of the fixed support seat 2, the movable support seat 3, and the movable plate 5, and is held in position by pads 6 and / or pads 7 stacked between two adjacent side plates 4 along the width direction of the base 1. In other embodiments, the side plate 4 can also be detachably fixed to the side of the fixed support seat 2, the movable support seat 3, and the movable plate 5 by bolts or other fasteners.

[0027] With the addition of the slide groove 11, the movable support seat 3 and the movable plate 5 can be moved in or out along the side of the base 1. Therefore, the movable plate 5 can be selectively set according to the actual production needs of the precast beam. When the movable plate 5 is in use, the vertical support of the movable plate 5 can be maintained by the cooperation of the slide groove 11 and the sliding block 52. The position of the movable plate 5 in the width direction of the base 1 is maintained by the movable plates 5 on both sides of the movable plate 5 and the stacked pads 6 and / or pads 7.

[0028] Both sides of the base 1 are provided with sliding grooves 11 along the width direction of the base 1. There are two movable force-bearing seats 3 and two movable plates 5. The fixed force-bearing seat is centrally located at the top of the base 1 and between the two movable force-bearing seats 3. The two movable plates 5 are correspondingly located between the fixed force-bearing seat 2 and the two movable force-bearing seats 3. This method can produce multiple precast beams simultaneously, improving production efficiency and mold utilization, and reducing costs.

[0029] The locking element 36 is a locking nut, the diameter of which is equal to the width of the slotted hole 32. The upper side of the moving rod 34 is threaded, and a portion of the threaded area of ​​the moving rod 34 is located within the movable hole. The locking nut is threadedly connected to the upper end of the moving rod 34. Based on this configuration, after the locking block 35 abuts against the inner wall of the slide groove 11, rotating the locking nut causes it to abut against the top of the movable force-bearing seat 3, thus locking the position of the moving rod 34. The threaded locking structure provides effective locking force and is easy and quick to adjust.

[0030] The slide groove 11, sliding block 31, and sliding block 52 are all inverted T-shaped. The inverted T-shaped structure has a good guiding effect, ensuring smooth movement and accurate positioning. At the same time, it prevents sliding block 31 and sliding block 52 from coming out of the slide groove 11, improving safety and reliability. It also improves the resistance to torsion and overturning, making it more suitable for high-stress conditions.

[0031] Specifically, the locking block 35 is a wedge-shaped block, the opening 33 penetrates the side of the vertical portion of the sliding block 31, and there is a gap between the lateral portion of the sliding block 31 and the inner top surface of the slide groove 11 for the locking block 35 to be inserted. The wedge-shaped block can generate radial tightening force, forming a tight contact with the inner top surface of the slide groove 11 to achieve a locking effect. Combined with the locking nut locking the moving rod 34, it ensures that the movable force-bearing seat 3 is tightly attached to the top of the base 1 and effectively prevents the movable force-bearing seat 3 from loosening.

[0032] The base 1 has at least two sliding grooves 11 on one side, at least two sliding blocks 31 at the bottom of a single movable support seat 3, and at least two sliding blocks 52 at the bottom of a single movable plate 5. Multiple sliding support points can distribute the load more evenly while ensuring the smooth movement of the movable support seat 3 and the movable plate 5. Specifically, the movable support seat 3 has a movable hole, an opening 33, a moving rod 34, a locking block 35, and a locking element 36 in the area corresponding to each sliding block 31.

[0033] Both the fixed support seat 2 and the movable support seat 3 are steel box structures, welded together from steel plates or I-beams, with internal steel-concrete composite columns for support. This structural design significantly improves compressive strength and rigidity, reducing the amount of steel plates used in a single steel mold while enhancing overall load-bearing capacity and anti-overturning properties. The base 1 can also be a box structure welded together from steel plates or I-beams, with internal steel-concrete composite columns for support, giving the mold a certain strength and rigidity, allowing it to self-support prestress.

[0034] The base 1 has several leveling support structures 8 at its bottom, used for supporting the mold as a whole and adjusting the flatness of the mold. These leveling support structures 8 are specifically distributed at the four corners of the bottom of the base 1. The leveling support structure 8 can be a hydraulic support leg or other height-adjustable support structure with high load-bearing capacity.

[0035] like Figure 1 As shown, the fixed support seat 2, the movable support seat 3, and the base 1 have the same length, and both ends of the fixed support seat 2, the movable support seat 3, and the base 1 are provided with connecting plates 9, and the connecting plates 9 are provided with connecting holes 91. Based on this configuration, two or more molds can be connected along the length direction for combined use. Figure 7 As shown, the two molds are connected by aligning their ends, passing bolts through the corresponding connecting plates 9, and locking them with nuts, thus meeting more diverse production needs. When using only one mold to produce precast beams, the rebar tensioning device can be fixed at one end of the mold arrangement area or at one end of the mold itself. When using two or more molds in combination to produce precast beams, the rebar tensioning device can be fixed at one end of the mold arrangement area or at one end of the final mold.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0037] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A mold for prestressed precast beams using the pre-tensioning method, characterized in that, The system includes a base (1), a fixed support seat (2), a movable support seat (3), and a side plate (4), as well as a pad (6) and / or a pad (7); the fixed support seat (2) is fixedly mounted on the top of the base (1), and a groove (11) is provided on the side of the base (1) along the width direction of the base (1), with the top of the groove (11) penetrating the top of the base (1). The bottom of the movable support seat (3) is provided with a sliding block (31) that cooperates with the groove (11), so that the movable support seat (3) is movably mounted on the top of the base (1). A strip hole (32) is provided on the top of the movable support seat (3), and the strip hole (32) is provided with a strip hole (32). 2) The lower end of the sliding block (31) passes through the side of the sliding block (31) through the opening (33). A radially movable moving rod (34) is inserted in the strip hole (32). A locking block (35) facing the opening (33) is provided at the lower end of the moving rod (34), and a locking member (36) for fixing the position of the moving rod (34) is provided at the upper end of the moving rod (34). The side plate (4) is used to be arranged on the side of the fixed force seat (2) and the movable force seat (3) to form the side of the precast beam. The pad (6) and / or pad (7) are used to be arranged on the top of the base (1) and located between two adjacent side plates (4) along the width direction of the base (1).

2. The prestressed precast beam mold as described in claim 1, characterized in that, It also includes a movable plate (5), the bottom of which is provided with a sliding block (52) that cooperates with the slide groove (11) so that the movable plate (5) is movably set on the top of the base (1) and located between the fixed force seat (2) and the movable force seat (3). The side plate (4) is used to be arranged on the side of the fixed force seat (2), the movable force seat (3) and the movable plate (5) to form the side of the precast beam.

3. The prestressed precast beam mold as described in claim 2, characterized in that, The base (1) has a sliding groove (11) on both sides along the width direction of the base (1). There are two movable force-bearing seats (3) and two movable plates (5). The fixed force-bearing seat is centrally located at the top of the base (1) and between the two movable force-bearing seats (3). The two movable plates (5) are located between the fixed force-bearing seat (2) and the two movable force-bearing seats (3).

4. The prestressed precast beam mold according to any one of claims 1-3, characterized in that, The locking component (36) is a locking nut, and the upper side of the moving rod (34) is provided with threads. The locking nut is connected to the upper end of the moving rod (34) by the threads.

5. The prestressed precast beam mold according to any one of claims 1-3, characterized in that, The groove (11), sliding block one (31) and sliding block two (52) are all inverted T-shaped.

6. The prestressed precast beam mold as described in claim 5, characterized in that, The locking block (35) is a wedge-shaped block, the opening (33) penetrates the side of the vertical part of the sliding block (31), and there is a gap between the horizontal part of the sliding block (31) and the inner top surface of the groove (11) for the locking block (35) to be inserted.

7. The prestressed precast beam mold according to any one of claims 1-3 and 6, characterized in that, The number of the sliding groove (11) on one side of the base (1), the sliding block one (31) at the bottom of the single movable force seat (3), and the sliding block two (52) at the bottom of the single movable plate (5) are all at least two.

8. The prestressed precast beam mold according to any one of claims 1-3 and 6, characterized in that, Both the fixed support seat (2) and the movable support seat (3) are steel box structures, and are supported by steel pipe concrete columns inside.

9. The prestressed precast beam mold according to any one of claims 1-3 and 6, characterized in that, The bottom of the base (1) is provided with several leveling support structures (8).

10. The prestressed precast beam mold according to any one of claims 1-3 and 6, characterized in that, The fixed force-bearing seat (2), the movable force-bearing seat (3) and the base (1) have the same length, and the fixed force-bearing seat (2), the movable force-bearing seat (3) and the base (1) are provided with connecting plates (9) at both ends, and the connecting plates (9) are provided with connecting holes (91).

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