Split mold frame turnover device for hollow concrete structure

Abstract

This invention discloses a split-type formwork flipping device for hollow concrete structures, including a formwork frame and a hollow concrete structure. A support plate is installed on the top of the formwork frame, and multiple sets of hoists are installed on the top of the support plate. Each set of hoists suspends a template via steel wire. Connecting plates are installed at the top and bottom ends of the template on the side away from the hollow concrete structure. The top of the connecting plates has equidistant mounting holes. A work box is installed on the front end of the template. Connecting seats with through holes are installed at the front and rear ends of the top of the side of the template away from the hollow concrete structure. This invention covers the template facing the hollow concrete structure by setting a concrete curing film on the outer wall of a film roller. The template then blocks the film. When the concrete is poured, the film separates the template from the concrete, preventing adhesion between the concrete and the template.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, specifically to a split formwork flipping device for hollow concrete structures. Background Technology

[0002] Hollow concrete structures are widely used in modern engineering construction, including storage silos, thin-walled hollow bridge piers, and chimneys. These hollow concrete structures are generally tall and employ construction techniques such as slip formwork, climbing formwork, and flip formwork. Slip formwork offers fast construction speed and good safety, but quality control is difficult; climbing formwork provides better construction quality but requires excessive investment; flip formwork provides better overall quality, but poses high safety risks when the concrete structure is tall.

[0003] In the existing technology, the outer formwork needs to be disassembled and the surface of the formwork continuously to avoid the concrete from sticking to the outer formwork after the concrete is poured. This would damage the concrete structure when the outer formwork is separated from the hollow concrete structure. Moreover, the continuous disassembly and assembly of the outer formwork wastes a lot of time and effort.

[0004] Therefore, it is necessary to provide a split formwork flipping device for hollow concrete structures to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a split formwork flipping device for hollow concrete structures, which solves the problem in the prior art where, during the flipping process, the formwork needs to be constantly disassembled and the surface of the formwork needs to be smoothed to avoid adhesion between the concrete and the formwork after concrete pouring, which could damage the concrete structure when the formwork is lifted. Moreover, the constant disassembly and assembly of the formwork is also time-consuming and labor-intensive. The technical solution of this invention addresses the problem of the overly simplistic solutions in the prior art and provides a solution that is significantly different from the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a split formwork flipping device for hollow concrete structures, comprising a formwork frame and a hollow concrete structure, wherein a support plate is installed on the top of the formwork frame, and multiple sets of hoists are installed on the top of the support plate, and each set of hoists suspends a template via steel wire, wherein connecting plates are installed at the upper and lower ends of the side of the template away from the hollow concrete structure, and mounting holes are equidistantly opened on the top of the connecting plates, and a work box is installed on the front end face of the template.

[0007] Preferably, the front and rear ends of the top side of the template away from the hollow concrete structure are equipped with connecting seats with through holes.

[0008] Preferably, the mold frame is composed of multiple mounting frames spliced ​​together vertically, and the top four corners of the mounting frame are provided with mounting grooves. The mounting grooves are fitted with fixing plates connected to the bottom of another set of mounting frames. The fixing plates are provided with slots facing outwards from the mounting frames, and the slots are fixed by locking rods.

[0009] Preferably, the template has an inner groove on the side near the hollow concrete structure, and the top of the work box is provided with an installation shell, with a film roller extending to one end of the inner groove inside the installation shell.

[0010] Preferably, the front end face of the work box is provided with a slot, a lead screw is rotatably installed inside the slot, an L-shaped plate is sleeved on the outer wall of the lead screw, an electrically controlled suction cup is installed on the inner side of the L-shaped plate, and a groove is provided at the top of the slot to house a motor, and the output end of the motor is connected to the lead screw.

[0011] Preferably, the inner side of the L-shaped plate is provided with a movable groove, one end of which is connected to a first spring, and the other end of the first spring is connected to a connecting block fixed to one side of the electrically controlled suction cup.

[0012] Preferably, the template has an L-shaped oil channel inside, a second spring is installed at one end of the L-shaped oil channel, and a piston plate is connected to the other end of the second spring and rests against the surface of the electrically controlled suction cup. The extended end of the L-shaped oil channel has equidistant connecting grooves for installing extrusion plates, and one end of the extrusion plate is connected to a blade flush with the template.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The present invention covers the template facing the hollow concrete structure by setting a concrete curing film on the outer wall of the film roller, and then the template blocks the film. When the concrete is poured, the set film separates the template from the concrete, thus avoiding the situation where the concrete and the template stick together.

[0015] 2. This invention features a through-hole in the inner tank near the hollow concrete structure, allowing the first end of the membrane to pass through and then pass under the electrically controlled suction cup. The suction cup then adheres to the surface of the work box, fixing the membrane in place. As the L-shaped plate moves downwards, the membrane moves downwards to cover one side of the template. Concrete is then poured, ensuring the concrete height is below the blade position. The suction cup is then reset, and the membrane is suctioned again. The suction cup presses the piston plate towards the inside of the template, squeezing the oil from the oil channel into the connecting groove, moving the extrusion plate and causing the blade to move and cut the membrane. The blade is positioned below the suction cup. As the suction cup moves downwards to cover the template with the membrane, a second spring resets the piston plate, thus resetting the blade. This repetitive process ensures the membrane covers the template with each lift, preventing adhesion between the concrete and the template.

[0016] 3. This invention uses a thin film to shield the side of the formwork facing the hollow concrete structure, preventing contact between the concrete and the formwork. Therefore, each time the formwork is lifted, it is unnecessary to disassemble it again for smoothing; instead, the formwork can be directly lifted using a hoist for the next fixation and pouring, saving significant time and greatly improving the efficiency of hollow concrete structure construction.

[0017] 4. This invention is developed based on the hydration principle of concrete. The core material has special functional groups that can absorb hundreds to thousands of times its own weight in water. After absorbing water, it forms a miniature reservoir. Due to its inherent properties, the curing film adheres tightly to the concrete, preventing it from flowing off, squeezing out, or evaporating. However, it can transmit and penetrate the concrete surface through capillary action, continuously providing water for concrete curing and repeatedly absorbing the evaporated water from the curing body to cure the concrete surface. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a front view of the present invention;

[0020] Figure 3 This is a three-dimensional view of the assembled mounting bracket of the present invention;

[0021] Figure 4 This is a top view of the mounting bracket of the present invention.

[0022] Figure 5 This is a perspective view of the template of the present invention;

[0023] Figure 6 This is a side view of the template of the present invention.

[0024] Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle;

[0025] Figure 8 This is a top view of the template of the present invention;

[0026] Figure 9 For the present invention Figure 8 Enlarged view at point B in the middle;

[0027] Figure 10 This is a three-dimensional view of the template assembly of the present invention;

[0028] Figure 11 This is a schematic diagram of the concrete diversion device used in Embodiment 2 of the present invention.

[0029] In the diagram: 1. Mold frame; 101. Mounting frame; 102. Mounting groove; 103. Fixing plate; 104. Slot; 105. Rod; 2. Hollow concrete structure; 3. Support plate; 4. Hoist; 5. Template; 501. Inner groove; 502. Mounting housing; 503. Film roll; 6. Connecting plate; 7. Mounting hole; 8. Working box; 801. Slot; 802. Lead screw; 803. L-shaped plate; 804. Electrically controlled suction cup; 805. Motor; 9. Movable groove; 10. First spring; 11. Connecting block; 12. L-shaped oil channel; 13. Second spring; 14. Piston plate; 15. Extrusion plate; 16. Blade. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0032] Please see Figure 1-10 A split formwork flipping device for hollow concrete structures includes a formwork frame 1 and a hollow concrete structure 2. A support plate 3 is installed on the top of the formwork frame 1. Multiple sets of hoisting hoists 4 are installed on the top of the support plate 3. Each set of hoisting hoists 4 suspends a template 5 via steel wire. Connecting plates 6 are installed at the top and bottom ends of the side of the template 5 away from the hollow concrete structure 2. The top of the connecting plates 6 is provided with equidistant mounting holes 7. A work box 8 is installed on the front end face of the template 5.

[0033] like Figure 1-10 As shown, the front and rear ends of the top of the template 5 away from the concrete hollow structure 2 are equipped with connecting seats with through holes. The connecting seats with through holes can be lifted and adjusted by the hoisting hoist 4 with steel wire.

[0034] like Figure 1-10 As shown, the formwork 1 is composed of multiple mounting brackets 101 spliced ​​together vertically. The top four corners of the mounting brackets 101 are provided with mounting grooves 102. The mounting grooves 102 are fitted with fixing plates 103 connected to the bottom of another set of mounting brackets 101. The fixing plates 103 are provided with slots 104 facing outwards from the mounting brackets 101. The slots 104 are fixed by locking rods 105. The formwork 1 is spliced ​​together with multiple mounting brackets 101. The height of the formwork 1 can be adjusted by the height of the poured concrete hollow structure 2. This not only makes splicing convenient, but also reduces the power consumption of lifting the formwork 5 by splicing to a suitable height of the formwork 1.

[0035] like Figure 1-10As shown, the template 5 has an inner groove 501 on the side near the hollow concrete structure 2. The top of the work box 8 is provided with an installation shell 502. Inside the installation shell 502, a film roller 503 extends to one end of the inner groove 501. The template 5 is covered with a concrete curing film on the outer wall of the film roller 503, which is then used to block the film. When the concrete is poured, the film separates the template 5 from the concrete, preventing the concrete from sticking to the template 5.

[0036] like Figure 1-10 As shown, the front end face of the work box 8 has a slot 801. A lead screw 802 is rotatably installed inside the slot 801. An L-shaped plate 803 is sleeved on the outer wall of the lead screw 802. An electrically controlled suction cup 804 is installed on the inner side of the L-shaped plate 803. A groove is opened at the top of the slot 801 to house a motor 805. The output end of the motor 805 is connected to the lead screw 802. The motor 805 can drive the lead screw 802 to rotate, thereby driving the L-shaped plate 803 to move up and down, which in turn can drive the electrically controlled suction cup 804 to move down.

[0037] like Figure 1-10 As shown, an movable groove 9 is provided on the inner side of the L-shaped plate 803. One end of the movable groove 9 is connected to a first spring 10, and the other end of the first spring 10 is connected to a connecting block 11 fixed on one side of the electric suction cup 804. By providing a through hole in the inner groove 501 near the concrete hollow structure 2, the first end of the film passes through and then passes under the electric suction cup 804. At this time, the electric suction cup 804 starts to work and will be adsorbed on the surface of the work box 8 to fix the film. Then, as the L-shaped plate 803 moves downward, it can drive the film to move downward and cover one side of the template 5. Then the electric suction cup 804 is reset.

[0038] like Figure 1-10As shown, the interior of the template 5 is provided with an L-shaped oil channel 12. A second spring 13 is installed at one end of the L-shaped oil channel 12, and the other end of the second spring 13 is connected to a piston plate 14 that rests against the surface of the electric suction cup 804. The extended end of the L-shaped oil channel 12 is provided with a connecting groove for installing an extrusion plate 15. One end of the extrusion plate 15 is connected to a blade 16 that is flush with the template 5. After the concrete is poured, the electric suction cup 804 is controlled to adsorb the film. During this process, the piston plate 14 is squeezed towards the interior of the template 5 by the suction cup, thereby squeezing the oil inside the oil channel into the connecting groove, which drives the extrusion plate 15 to move, and then causes the blade 16 to move and cut the film. The blade 16 is located below the electric suction cup 804 at this time. During the process of the electric suction cup 804 moving downward to cover the template 5 with the film, the piston plate 14 is reset by the second spring 13, which in turn resets the blade 16. This process can be repeated so that the film can cover the template 5 every time the template 5 is lifted, avoiding the adhesion between the concrete and the template 5.

[0039] To supplement the above: First, based on the cross-sectional dimensions of the hollow concrete structure and the loads to be borne, the design calculations for the lifting system and formwork 1 are performed. After the calculations are completed, construction control lines are laid out at the construction location according to the control points of the concrete structure, the outer edge of the structure is determined, and marked with ink lines. Reinforcing bars are driven into the inner side of the ink lines as support points for the bottom formwork 5, and then the reinforcing bars are tied. The formwork 5 is lifted in a cyclical operation. Before each lift, the reinforcing bars are tied, and then the formwork 5 is lifted and the concrete is poured. This cycle is repeated to complete one formwork. Then, the installation frame 101 is assembled at the designated location to form formwork 1, and a hoist 4 is installed on the top of formwork 1 to suspend the formwork 5 with steel wire. The hoist 4 uses a winch as the lifting power to transport the required materials to the construction platform. When the formwork 5 is raised, the steel strand is locked to the connecting seat welded on the formwork 5. The winch is turned on to lift the formwork 5 to the next pouring position. After the formwork 5 is corrected and the protective layer is adjusted... After the pre-embedded parts are accurately installed and the overall structure is in place, concrete construction is carried out. After the bottom section of concrete is poured and the concrete reaches the specified strength, the height of formwork 1 can be raised. Then, the reinforcing steel and formwork 5 of the second section are installed. The second section of formwork 5 is installed on top of the first section of formwork 5. The upper and lower formwork 5 are connected together with bolts and initially fixed to the bottom section of concrete with pre-set tie rods. The formwork 5 is adjusted to the accurate position, and the external support rods are installed and tightened. The remaining work is the same as the construction of the first section. After the concrete reaches the specified strength, it is made according to the hydration principle of concrete. The core material has special functional groups that can absorb hundreds to thousands of times its own weight in water. After absorbing water, it forms a miniature reservoir. Due to its own characteristics, the curing film adheres tightly to the concrete, cannot flow off, cannot be squeezed out, and is difficult to evaporate. However, it can be transmitted and penetrated on the concrete surface through capillary action, continuously providing water for concrete curing and repeatedly absorbing the evaporated water of the curing body to cure the concrete surface.

[0040] Working Principle: The mold frame 1 of this invention is spliced ​​together using multiple mounting brackets 101. The height of the mold frame 1 can be adjusted by the height of the poured hollow concrete structure 2. This not only facilitates splicing but also reduces the power consumption of lifting the template 5 by adjusting the height of the mold frame 1 to suit different heights. When the template 5 is installed in the designated position, a concrete curing film is provided on the outer wall of the film roller 503 to cover the template 5 facing the hollow concrete structure 2. The template 5 then holds the film in place. When the concrete is poured, the film separates the template 5 from the concrete, preventing adhesion between the concrete and the template 5. A through hole is provided in the inner groove 501 near the hollow concrete structure 2, allowing the first end of the film to pass through and then pass under the electrically controlled suction cup 804. At this time, the electrically controlled suction cup 804 starts working and adsorbs onto the surface of the working box 8 to fix the film. Then, as L... The downward movement of the forming plate 803 causes the film to move downward, thus covering one side of the template 5. Then, concrete is poured. After pouring, the concrete height should be lower than the position of the blade 16. Then, the electrically controlled suction cup 804 is reset, and the film is adsorbed again. At this time, the piston plate 14 is squeezed towards the inside of the template 5 by the suction cup, thereby squeezing the oil in the oil channel into the connecting groove, which drives the extrusion plate 15 to move, thereby causing the blade 16 to move and cut the film. The blade 16 is located below the electrically controlled suction cup 804. During the process of the electrically controlled suction cup 804 moving downward to cover the template 5 with the film, the piston plate 14 is reset by the second spring 13, thereby resetting the blade 16. This process can be repeated so that the film can cover the template 5 every time the template 5 is lifted, avoiding the adhesion between the concrete and the template 5. Similarly, the front and rear ends of the hollow concrete structure 2 are cast using the same method.

[0041] Example 2

[0042] like Figure 11As shown, after the template 5 is corrected, the protective layer is adjusted, and the embedded parts are accurately installed, concrete construction can begin. A concrete diversion device can be installed on one side of the concrete structure. During pouring, the pump pipe is extended into the diversion device, which directly distributes the concrete with higher impact force into the template 5 in two directions, reducing the impact of the concrete entering the formwork. Concrete is poured in layers, with each layer 30cm high. After pouring, the concrete surface should be 10-15cm from the upper edge of the template 5. A Φ50mm immersion vibrator is used for compaction. During construction, the vibrator is inserted vertically, quickly entering and slowly exiting, to a depth of 5-10cm in the lower layer of concrete. The moving distance should not exceed 1.5 times the vibrator's radius of action, i.e., 45-60cm. Vibration points should be evenly distributed, advancing in rows or staggered. Vibration time should be strictly controlled to avoid over-vibration or under-vibration. The vibration time is 20-30 seconds. After each point is vibrated, the vibrator is slowly withdrawn while still vibrating. When vibrating near formwork 5, maintain a spacing of 5-10cm, vibrating from the perimeter first and then the center. During vibration, be careful not to loosen formwork 5 or cause the reinforcing bars to shift.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A split formwork flipping device for hollow concrete structures, comprising a formwork (1) and a hollow concrete structure (2); Its features are: The top of the formwork (1) is equipped with a support plate (3), and multiple sets of hoisting hoists (4) are installed on the top of the support plate (3). Each set of hoisting hoists (4) is equipped with a template (5) by steel wire. The upper and lower ends of the template (5) away from the concrete hollow structure (2) are equipped with connecting plates (6). The top of the connecting plates (6) is provided with mounting holes (7) at equal intervals. The front end of the template (5) is equipped with a work box (8). The template (5) has an inner groove (501) on the side near the hollow concrete structure (2), and the top of the work box (8) is provided with an installation shell (502). The installation shell (502) has a film roller (503) extending to one end of the inner groove (501). The front end face of the work box (8) is provided with a slot (801), and a lead screw (802) is rotatably installed inside the slot (801). An L-shaped plate (803) is sleeved on the outer wall of the lead screw (802), and an electric suction cup (804) is installed on the inner side of the L-shaped plate (803). A groove is provided at the top of the slot (801) to house a motor (805), and the output end of the motor (805) is connected to the lead screw (802). The template (5) has an L-shaped oil channel (12) inside. A second spring (13) is installed at one end of the L-shaped oil channel (12). The other end of the second spring (13) is connected to a piston plate (14) that rests against the surface of the electric suction cup (804). The extended end of the L-shaped oil channel (12) has a connecting groove at equal intervals for installing an extrusion plate (15). One end of the extrusion plate (15) is connected to a blade (16) that is flush with the template (5).

2. The split formwork flipping device for hollow concrete structures according to claim 1, characterized in that: The template (5) has a connecting seat with through holes installed at the front and rear ends of the top side away from the hollow concrete structure (2).

3. The split formwork flipping device for hollow concrete structures according to claim 2, characterized in that: The mold frame (1) is composed of multiple mounting frames (101) spliced ​​together vertically. The top four corners of the mounting frame (101) are provided with mounting grooves (102). The mounting grooves (102) are equipped with fixing plates (103) connected to the bottom of another set of mounting frames (101). The fixing plates (103) are provided with slots (104) facing the outside of the mounting frame (101). The slots (104) are fixed by a locking rod (105).

4. The split formwork flipping device for hollow concrete structures according to claim 1, characterized in that: The L-shaped plate (803) has an inner groove (9) with a first spring (10) connected to one end of the groove (9) and a connecting block (11) fixed to one side of the electric suction cup (804) with the other end of the first spring (10).

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