Prefabricated hollow slab beam formwork structure

Abstract

The invention discloses a prefabricated hollow plate beam formwork structure, relates to the field of road engineering formwork equipment, and solves the problems that when an existing prefabricated hollow plate beam formwork structure is used, the outer edges of the two sides are too close to a hollow plate beam in the folding process of an inner mold, the demolding efficiency is affected, and meanwhile abrasion is likely to occur. Comprising a fixed pipe, a telescopic mechanism, a turnover mechanism, a control mechanism, two sets of first turnover plates and two sets of second turnover plates, a guide plate is fixedly connected to the side face of the fixed pipe, the telescopic mechanism comprises a sliding plate and a sliding part, the turnover mechanism comprises a first gear and a turnover part, and the control mechanism comprises a driving shaft. The two sets of first gears are sequentially rotated, so that the first overturning plate is overturned and folded earlier than the second overturning plate, preliminary contraction is achieved, after the first overturning plate and the second overturning plate are folded, the sliding plates on the two sides are linked to synchronously get close to one side of the fixing pipe, and the width of the whole inner mold during storage is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of road engineering formwork equipment, and specifically to a precast hollow slab beam formwork structure. Background Technique

[0002] The concrete slab beams used in highway road construction are hollow slab beams. With the increasing requirements for the road bearing capacity in highway construction, structural improvements have been made to the concrete hollow slab beams used in the project. The hollow slab beams are made into hollow slab beams with variable cross-sections, increasing the bearing capacity of the hollow slab. In the process of casting and production of the precast hollow slab beam formwork structure, the inner mold needs to be placed on the bottom steel mesh first, then the steel bars are tied around the inner mold, and then the concrete is poured around. After the concrete solidifies, the inner mold is controlled to be folded, and then the inner mold is withdrawn from the hollow slab beam to complete the production of a group of hollow slab beams.

[0003] During the folding process of the inner mold of the existing precast hollow slab beam formwork structure, only the flipping plates on both sides can be flipped and folded. After flipping, the middle rotating shaft parts on both sides are still relatively close to the inner wall of the hollow slab beam. During the process of withdrawing the inner mold, it will rub against the inner wall of the hollow slab beam, affecting the extraction efficiency. At the same time, it will also increase the wear of both sides of the inner mold and the inner wall of the hollow slab beam, reducing the overall service life of the inner mold and affecting the overall quality of the hollow slab beam. Summary of the Invention

[0004] The purpose of the present invention is to provide a precast hollow slab beam formwork structure that is convenient for increasing the overall shrinkage degree of the inner mold and effectively improving the demolding efficiency, so as to solve the problems raised in the above background technique.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a prefabricated hollow slab beam formwork structure, comprising a fixed tube, a telescopic mechanism, a flipping mechanism, a control mechanism, two groups of first flipping plates and two groups of second flipping plates, the side of the fixed tube is fixedly connected with a guide plate, the telescopic mechanism comprises two groups of sliding plates respectively connected to the inner walls of the guide plates on both sides in a horizontal sliding direction, the two groups of the first flipping plates are both mounted on one group of the sliding plates, the two groups of the second flipping plates are both mounted on the other group of the sliding plates, the fixed tube is provided with a sliding member for controlling the sliding plates on both sides to slide horizontally along the inner walls of the guide plates, the flipping mechanism comprises a sliding member mounted on the two groups of the sliding plates The first gear on the upper part, the sliding plate is provided with a flipping member for controlling the first flip plate and the second flip plate to flip when the first gear rotates, the control mechanism includes a driving shaft rotatably connected to the inner wall of the fixed tube, and the control mechanism can control the two groups of the first gears to rotate in sequence through the rotation of the driving shaft, so that the first flip plate is flipped and folded before the second flip plate, and after the first flip plate and the second flip plate are folded, the sliding plates on both sides are linked to synchronously approach one side of the fixed tube, thereby reducing the overall width of the inner mold when it is stored, facilitating the increase of the overall shrinkage degree of the inner mold to effectively improve the demolding efficiency.

[0006] Preferably, the flip member includes a rotating rod fixedly mounted on the sliding plate, and the two groups of the first flip plates and the second flip plates are respectively fixedly connected with rotating blocks rotatably connected to the rotating rod, and the first flip plate and the second flip plate are both provided with sliding grooves, and sliding blocks are slidably connected in the sliding grooves, and a connecting block is rotatably connected to the sliding block, and a lifting member for controlling the connecting block to lift and move is provided on the sliding plate, so as to facilitate the linkage control of the first flip plate and the second flip plate to flip when the first gear rotates.

[0007] Preferably, the lifting member includes a threaded rod fixedly mounted on the connecting block, and threaded cylinders are fixedly connected to the upper and lower sides of the two groups of the first gears, the inner wall of the threaded cylinder is threadedly connected to the outer wall of the threaded rod, and the two groups of the first gears are respectively rotatably connected to the sliding plates on both sides, and the control mechanism is used to control the two groups of the first gears to rotate successively, so as to facilitate the control of the connecting block to move up and down.

[0008] Preferably, the sliding member includes a sliding frame mounted on the fixed tube. A guiding groove is formed in the fixed tube. The sliding frame is slidably connected to the inner wall of the guiding groove in the horizontal direction. The driving shaft penetrates the inner wall of the sliding frame and is movably sleeved with the inner wall of the sliding frame. A plurality of rotating shafts are respectively rotatably connected to both sides of the sliding frame. A push-pull rod is fixedly connected to the rotating shaft. One end of the push-pull rod away from the rotating shaft is rotatably connected to the sliding plate. A plurality of push-pull rods on the same side of the sliding frame are parallel to each other. The control mechanism is used to control the moving state of the sliding frame, so as to control the horizontal sliding of the two sliding plates along the inner wall of the guiding plate.

[0009] Preferably, the control mechanism further includes a driving frame slidably connected to the inner wall of the guiding groove. The driving shaft penetrates the driving frame. A threaded groove threadedly connected to the inner wall of the driving frame is formed on the outer wall of the driving shaft. First racks are respectively fixedly connected to both sides of the driving frame. The two first racks can respectively mesh with the two first gears. The distance between the first gear close to one side of the first flipping plate and the sliding frame is greater than the distance between the first gear close to the other side of the second flipping plate and the sliding frame. A driving member for controlling the sliding of the sliding frame is provided on the driving frame, so as to control the rotation of the two first gears in sequence through the rotation of the driving shaft, so that the first flipping plate flips and folds prior to the second flipping plate, and after the first flipping plate and the second flipping plate are folded, the two sliding plates are driven to move synchronously towards the fixed tube side, reducing the overall width during the storage of the inner mold.

[0010] Preferably, the driving member includes a driving plate fixedly installed on the driving frame. A clamping groove is formed in the sliding frame. A clamping block is slidably connected to the driving plate in the vertical direction. A return spring fixedly connected to the driving plate is fixedly connected to the clamping block. One side of the clamping block close to the sliding frame is designed as an inclined surface. The side of the clamping block away from the sliding frame can be clamped with the clamping groove. A control member for controlling the clamping state of the clamping block and the clamping groove is provided on the sliding frame, so as to control the sliding of the sliding frame.

[0011] Preferably, the control member includes a pushing block slidably connected to the inner wall of the clamping groove in the horizontal direction. A first inclined surface is formed on the pushing block. A second inclined surface capable of slidingly fitting with the first inclined surface is formed on the side surface of the clamping block. A second gear is coaxially and fixedly connected to any one of the rotating shafts. A second rack meshing with the second gear is fixedly connected to the side surface of the pushing block, so as to control the clamping state of the clamping block and the clamping groove.

[0012] Preferably, a sealing edge plate capable of fitting with the second flip plate is fixedly connected to the first flip plate, and a triangular plate is fixedly connected to one side of the second flip plate close to the first flip plate, which is convenient for ensuring that the outer surface of the overall inner mold is relatively flat and closed after flipping and unfolding.

[0013] Preferably, through holes are formed in the guide plate, and the threaded cylinder passes through the through holes and is movably connected to the inner wall of the through holes, which is convenient for the threaded cylinder to slide and rotate inside the through holes.

[0014] Preferably, there are two sets of driving members, and the two sets of driving members are symmetrically distributed on the upper and lower sides of the driving shaft, which is convenient for improving the stability during the driving process of the sliding frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: A precast hollow slab beam formwork structure provided by the present invention solves the problem that during the folding process of the inner mold of the existing precast hollow slab beam formwork structure, the outer edges on both sides are too close to the hollow slab beam, which affects the demoulding efficiency and is prone to wear. By controlling the rotation of the driving shaft through the control mechanism, the two sets of first gears are rotated in sequence, so that the first flip plate flips and folds prior to the second flip plate, realizing preliminary contraction, and after the folding of the first flip plate and the second flip plate is completed, the two side sliding plates are linked to move synchronously towards the fixed pipe side, reducing the width of the overall inner mold during storage, improving the subsequent demoulding efficiency, reducing the friction between the inner mold and the hollow slab beam during demoulding, effectively extending the overall service life of the equipment, and also playing a certain role in protecting the inner wall of the hollow slab beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the inner mold of the present invention in the unfolded state; Figure 2 is a schematic structural diagram of the inner mold of the present invention in the folded and contracted state; Figure 3 is a schematic structural diagram of the overall inner mold of the present invention; Figure 4 is an exploded view of the partial structure of the inner mold of the present invention; Figure 5 is a schematic diagram of the partial structure of the flipping mechanism of the present invention; Figure 6 is Figure 5 the enlarged view of area A in Figure 7 is a sectional view of the partial structure of the flipping mechanism of the present invention; Figure 8 is Figure 7 the enlarged view of area B in Figure 9 is a schematic diagram of the partial structure of the telescoping mechanism of the present invention; Figure 10 This is a partial cross-sectional view of the control mechanism of the present invention; Figure 11 is Figure 10 an enlarged view of area C in Figure 12 This is a partial structural schematic diagram of the control mechanism of the present invention; Figure 13 is Figure 12 an enlarged view of area D in

[0017] In the figure: 1, fixed pipe; 2, first flipping plate; 3, second flipping plate; 4, guiding plate; 5, sliding plate; 6, sliding member; 7, first gear; 8, flipping member; 9, driving shaft; 10, rotating rod; 11, rotating block; 12, sliding groove; 13, sliding block; 14, connecting block; 15, lifting member; 16, threaded rod; 17, threaded barrel; 18, sliding frame; 19, guiding groove; 20, rotating shaft; 21, push-pull rod; 22, driving frame; 23, threaded groove; 24, first rack; 25, driving member; 27, driving plate; 28, clamping groove; 29, clamping block; 30, reset spring; 31, control member; 32, pushing block; 33, first inclined surface; 34, second inclined surface; 35, second gear; 36, second rack; 37, edge-sealing plate; 38, triangular plate; 39, through hole; 40, hollow plate beam. Specific Embodiment

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1-13 , the present invention provides a technical solution: a precast hollow plate beam formwork structure, including a fixed pipe 1, a telescopic mechanism, a flipping mechanism, a control mechanism, two groups of first flipping plates 2 and two groups of second flipping plates 3. A guiding plate 4 is fixedly connected to the side surface of the fixed pipe 1. An edge-sealing plate 37 capable of fitting with the second flipping plate 3 is fixedly connected to the first flipping plate 2. A triangular plate 38 is fixedly connected to the side of the second flipping plate 3 close to the first flipping plate 2. The telescopic mechanism includes two groups of sliding plates 5 respectively slidingly connected to the inner walls of the two guiding plates 4 in the horizontal direction. Both groups of first flipping plates 2 are installed on one group of sliding plates 5, and both groups of second flipping plates 3 are installed on the other group of sliding plates 5. A sliding member 6 for controlling the horizontal sliding of the two sliding plates 5 along the inner wall of the guiding plate 4 is provided on the fixed pipe 1.

[0020] The flipping mechanism includes a first gear 7 installed on two groups of sliding plates 5. The sliding plate 5 is provided with a flipping member 8 for controlling the first flip plate 2 and the second flip plate 3 to flip when the first gear 7 rotates. The control mechanism includes a driving shaft 9 rotatably connected to the inner wall of the fixed tube 1. One end of the driving shaft 9 is provided with a docking groove, which can be docked with a tool to assist in rotating the driving shaft 9. The control mechanism can control the two groups of first gears 7 to rotate in sequence through the rotation of the driving shaft 9, so that the first flip plate 2 is flipped and folded before the second flip plate 3, and after the first flip plate 2 and the second flip plate 3 are folded, the sliding plates 5 on both sides are linked to synchronously approach one side of the fixed tube 1 to reduce the overall width when the inner mold is stored.

[0021] The flip member 8 includes a rotating rod 10 fixedly mounted on the sliding plate 5, and the two groups of first flip plates 2 and second flip plates 3 are respectively fixedly connected with rotating blocks 11 rotatably connected to the rotating rod 10, and the first flip plates 2 and the second flip plates 3 are both provided with sliding grooves 12, and sliding blocks 13 are slidably connected in the sliding grooves 12, and connecting blocks 14 are rotatably connected to the sliding blocks 13, and a lifting member 15 for controlling the connecting blocks 14 to move up and down is provided on the sliding plate 5.

[0022] The lifting member 15 includes a threaded rod 16 fixedly mounted on the connecting block 14, and threaded tubes 17 are fixedly connected to the upper and lower sides of the two groups of first gears 7, and the inner wall of the threaded tube 17 is threadedly connected to the outer wall of the threaded rod 16. A through hole 39 is opened on the guide plate 4, and the threaded tube 17 passes through the through hole 39 and is movably connected to the inner wall of the through hole 39. The two groups of first gears 7 are rotatably connected to the sliding plates 5 on both sides respectively, and the control mechanism is used to control the two groups of first gears 7 to rotate successively.

[0023] The sliding member 6 includes a sliding frame 18 installed on the fixed tube 1, and a guide groove 19 is opened on the fixed tube 1. The sliding frame 18 is slidably connected to the inner wall of the guide groove 19 along the horizontal direction. The driving shaft 9 passes through the inner wall of the sliding frame 18 and is movably connected to the inner wall of the sliding frame 18. Both sides of the sliding frame 18 are rotatably connected to multiple groups of rotating shafts 20, and the rotating shafts 20 are fixedly connected to push-pull rods 21. The end of the push-pull rod 21 away from the rotating shaft 20 is rotatably connected to the sliding plate 5. The multiple groups of push-pull rods 21 located on the same side of the sliding frame 18 are parallel to each other. The control mechanism is used to control the moving state of the sliding frame 18.

[0024] The control mechanism further includes a driving frame 22 slidably connected to the inner wall of the guiding groove 19. The driving shaft 9 penetrates through the driving frame 22, and a threaded groove 23 threadedly connected to the inner wall of the driving frame 22 is provided on the outer wall of the driving shaft 9. First racks 24 are fixedly connected to both sides of the driving frame 22 respectively, and the two first racks 24 can be meshed with the two first gears 7 respectively. The distance between the first gear 7 closer to the first turning plate 2 and the sliding frame 18 is greater than the distance between the first gear 7 closer to the second turning plate 3 and the sliding frame 18. A driving member 25 for controlling the sliding of the sliding frame 18 is provided on the driving frame 22.

[0025] The driving member 25 includes a driving plate 27 fixedly installed on the driving frame 22. A clamping groove 28 is provided on the sliding frame 18. A clamping block 29 is slidably connected to the driving plate 27 in the vertical direction. A return spring 30 fixedly connected to the driving plate 27 is fixedly connected to the clamping block 29. The side of the clamping block 29 close to the sliding frame 18 is designed with an inclined surface. The side of the clamping block 29 away from the sliding frame 18 can be clamped with the clamping groove 28. A control member 31 for controlling the clamping state of the clamping block 29 and the clamping groove 28 is provided on the sliding frame 18. There are two groups of driving members 25, and the two groups of driving members 25 are symmetrically distributed on the upper and lower sides of the driving shaft 9.

[0026] The control member 31 includes a pushing block 32 slidably connected to the inner wall of the clamping groove 28 in the horizontal direction. A first inclined surface 33 is provided on the pushing block 32. A second inclined surface 34 capable of slidingly fitting with the first inclined surface 33 is provided on the side surface of the clamping block 29. A second gear 35 is coaxially and fixedly connected to any one of the rotating shafts 20. A second rack 36 meshing with the second gear 35 is fixedly connected to the side surface of the pushing block 32.

[0027] In this implementation, when the inner mold needs to be stored as a whole, the driving shaft 9 is rotated forward. The driving frame 22 is driven to slide in the guiding groove 19 through the threaded groove 23. The first rack 24 on the side of the driving frame 22 closer to the first turning plate 2 will first drive the first gear 7 on this side to rotate. The first gear 7 drives the threaded cylinder 17 to rotate, so that the threaded rod 16 gradually slides into the threaded cylinder 17. The threaded rod 16 drives the connected connecting block 14 to pull the sliding block 13 to rotate. The sliding block 13 slides in the sliding groove 12 while pulling the upper and lower first turning plates 2 to rotate around the rotating rod 10 at the same time, so that the first turning plate 2 gradually turns and approaches the middle. When the first turning plate 2 rotates to a certain angle (about 10°), at this time, the position of the driving frame 22 just makes the first rack 24 on the other side mesh with the first gear 7 closer to the second turning plate 3, so as to drive the threaded cylinder 17 on this side to rotate, and then the second turning plate 3 can be driven to turn and fold. At this time, since the first turning plate 2 has rotated a certain angle, it will not block the turning of the second turning plate 3.

[0028] Continue to rotate the drive shaft 9, and the drive frame 22 continues to slide towards the side of the sliding frame 18. When the drive frame 22 abuts against the sliding frame 18, at this time, the first racks 24 on both sides no longer mesh with the first gear 7. The first turning plates 2 and the second turning plates 3 on both sides have been turned and folded at this time. If the drive frame 22 continues to slide, it will push the sliding frame 18 to slide in the guide groove 19. During the pushing process, the sliding frame 18 pulls the rotating shaft 20, so that the push rod 21 pulls the sliding plates 5 on both sides to slide horizontally in the guide plate 4 towards the fixed pipe 1, so that the sliding plates 5 on both sides drive the first turning plates 2 and the second turning plates 3 to move towards the middle for a certain distance respectively, which can reduce the width of the overall inner mold after storage, and prevent the outer edges of the first turning plates 2 and the second turning plates 3 on both sides from being too close to the cast hollow slab beam 40, which affects the demolding efficiency. When the sliding frame 18 slides to one end position of the guide groove 19, stop rotating the drive shaft 9. At this time, the overall contraction of the inner mold is completed, and the demolding operation can be carried out.

[0029] When it is necessary to expand the inner mold for pouring the hollow slab beam 40, rotate the drive shaft 9 in the reverse direction. The drive shaft 9 drives the drive frame 22 to slide towards the side away from the sliding frame 18. At this time, one side of the clamping block 29 is clamped with the clamping groove 28, so that the drive frame 22 drives the sliding frame 18 to slide synchronously, so that the sliding frame 18 can push the push rods 21 on both sides to push the sliding plates 5 to both sides, completing the preliminary unfolding and reset of the positions of the sliding plates 5. During the process of one end of the push rod 21 moving with the sliding frame 18, the push rod 21 and the rotating shaft 20 will rotate at a certain angle. At this time, the rotating shaft 20 will drive the second gear 35 to rotate, and the second gear 35 drives the second rack 36 to push the pushing blocks 32 on both sides to slide into the clamping groove 28. The first inclined surface 33 on the pushing block 32 will slide with the second inclined surface 34 on the side of the clamping block 29, so as to gradually lift the clamping block 29. When the push rod 21 swings to a right angle state with the edge of the sliding plate 5, at this time, the clamping block 29 is already close to being pushed out of the clamping groove 28. After that, the clamping block 29 continues to slide a small distance with the drive frame 22, about 1 cm, so that the side of the push rod 21 close to the sliding frame 18 is slightly inclined towards the drive frame 22 side. At this time, refer to the Figure 8 guide groove 19 in the appendix. Since the edge thickness of the sliding frame 18 is greater than that of the drive frame 22, and the edges of the guide groove 19 also have two different widths, one end of the sliding frame 18 will be blocked by the guide groove 19 and cannot continue to slide towards the drive frame 22 side after sliding to the set position. At this time, the positions of the push rod 21 and the sliding frame 18 are preliminarily limited. The thrust of the sliding plates 5 on both sides on the push rod 21 cannot continue to push the sliding frame 18 to slide in the guide groove 19. At the same time, the clamping block 29 is just completely pushed out of the clamping groove 28 by the pushing block 32, releasing the clamping state.

[0030] After that, the driving frame 22 continues to slide, driving the first rack 24 on one side to first engage with the first gear 7 near the second turning plate 3, causing the second turning plate 3 to be unfolded by a set angle first. Then, as the driving frame 22 continues to slide, the first rack 24 on the other side drives the first gear 7 to rotate, causing the threaded cylinder 17 to rotate in the reverse direction and pushing the threaded rod 16 out of the threaded cylinder 17. Then, in cooperation with the rotation of the connecting block 14 and the sliding of the sliding block 13 in the sliding groove 12, the first turning plate 2 can be unfolded. The first turning plate 2 rotates around the rotating rod 10 on this side through the rotating block 11, and finally the surface of the first turning plate 2 is flush with the surface of the second turning plate 3. The triangular plate 38 fills the turning positions on the upper and lower sides, and at the same time, the edge-sealing plate 37 closes and fits the connection between the triangular plate 38 and the first turning plate 2, completing the unfolding of the entire inner mold, and then the hollow slab beam 40 can be poured and used.

[0031] It should be noted that when the driving frame 22 slides towards the sliding frame 18, the driving plate 27 will drive the clamping block 29 to first contact the clamping groove 28, and the return spring 30 on the clamping block 29 is in a compressed state. At this time, the pushing block 32 in the clamping groove 28 blocks it, and the clamping block 29 cannot be clamped with the clamping groove 28. Until the driving frame 22 pushes the sliding frame 18, the sliding of the sliding frame 18 will drive the push-pull rods 21 on both sides to rotate with the rotating shaft 20, so that the second gear 35 drives the second rack 36, driving the pushing block 32 to slide out of the clamping groove 28. After that, the return spring 30 pushes the clamping block 29 to insert into the clamping groove 28 to complete the clamping, thus realizing the function of automatically releasing the driving state every time the sliding frame 18 slides to the set position.

[0032] In order to improve the overall stability of the inner mold, multiple groups of telescopic mechanisms, turning mechanisms, and control mechanisms on the fixed pipe 1 can be evenly arranged and synchronously controlled by a set of driving shafts 9. While improving the support stability, it does not affect the operation convenience. Only by rotating the driving shaft 9 forward or backward until it cannot be rotated anymore, the operations of the overall storage and unfolding of the inner mold can be realized, and the operation is convenient and efficient.

[0033] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Prefabricated hollow slab beam formwork structure, characterized in that: include: A fixed tube (1), two groups of first flip plates (2) and two groups of second flip plates (3), wherein a guide plate (4) is fixedly connected to a side surface of the fixed tube (1); Also includes: A telescopic mechanism, the telescopic mechanism comprising two groups of sliding plates (5) respectively connected to the inner walls of the guide plates (4) on both sides in a horizontal sliding direction, the two groups of the first flip plates (2) are both mounted on one group of the sliding plates (5), the two groups of the second flip plates (3) are both mounted on the other group of the sliding plates (5), and the fixed tube (1) is provided with a sliding member (6) for controlling the sliding plates (5) on both sides to slide horizontally along the inner walls of the guide plates (4); A flipping mechanism, the flipping mechanism comprising a first gear (7) mounted on the two sets of sliding plates (5), the sliding plates (5) being provided with a flipping member (8) for controlling the first flipping plate (2) and the second flipping plate (3) to flip in linkage when the first gear (7) rotates; A control mechanism, the control mechanism comprising a drive shaft (9) rotatably connected to the inner wall of the fixed tube (1), the control mechanism being able to control the two sets of the first gears (7) to rotate in sequence through the rotation of the drive shaft (9), so that the first flip plate (2) is flipped and folded before the second flip plate (3), and after the first flip plate (2) and the second flip plate (3) are folded, the sliding plates (5) on both sides are linked to synchronously move closer to one side of the fixed tube (1).

2. The prefabricated hollow slab beam formwork structure according to claim 1, characterized in that: The flip member (8) comprises a rotating rod (10) fixedly mounted on the sliding plate (5); a rotating block (11) rotatably connected to the rotating rod (10) is fixedly connected to each of the two sets of the first flip plates (2) and the second flip plates (3); a sliding groove (12) is provided on each of the first flip plates (2) and the second flip plates (3); a sliding block (13) is slidably connected in the sliding groove (12); a connecting block (14) is rotatably connected to the sliding block (13); and a lifting member (15) for controlling the connecting block (14) to move upward and downward is provided on the sliding plate (5).

3. The prefabricated hollow slab beam formwork structure according to claim 2, characterized in that: The lifting member (15) comprises a threaded rod (16) fixedly mounted on the connecting block (14); threaded cylinders (17) are fixedly connected to the upper and lower sides of the two groups of the first gears (7); the inner wall of the threaded cylinder (17) is threadedly connected to the outer wall of the threaded rod (16); the two groups of the first gears (7) are rotatably connected to the sliding plates (5) on both sides respectively; and the control mechanism is used to control the two groups of the first gears (7) to rotate successively.

4. The prefabricated hollow slab beam formwork structure according to claim 1, characterized in that: The sliding member (6) comprises a sliding frame (18) mounted on the fixed tube (1), the fixed tube (1) being provided with a guide groove (19), the sliding frame (18) being slidably connected to the inner wall of the guide groove (19) in a horizontal direction, the driving shaft (9) penetrating the inner wall of the sliding frame (18) and being movably sleeved with the inner wall of the sliding frame (18), a plurality of groups of rotating shafts (20) being rotatably connected to the two sides of the sliding frame (18), a push-pull rod (21) being fixedly connected to the rotating shaft (20), an end of the push-pull rod (21) away from the rotating shaft (20) being rotatably connected to the sliding plate (5), the plurality of groups of push-pull rods (21) located on the same side of the sliding frame (18) being parallel to each other, and the control mechanism being used to control the moving state of the sliding frame (18).

5. The prefabricated hollow slab beam formwork structure according to claim 4, characterized in that: The control mechanism further comprises a driving frame (22) slidably connected to the inner wall of the guide groove (19), the driving shaft (9) passes through the driving frame (22), the outer wall of the driving shaft (9) is provided with a thread groove (23) threadedly connected to the inner wall of the driving frame (22), first racks (24) are fixedly connected to both sides of the driving frame (22), the first racks (24) on both sides can respectively mesh with the first gears (7) on both sides, the distance between the first gear (7) on the side close to the first flip plate (2) and the sliding frame (18) is greater than the distance between the first gear (7) on the side close to the second flip plate (3) and the sliding frame (18), and a driving member (25) for controlling the sliding frame (18) to slide is provided on the driving frame (22).

6. The prefabricated hollow slab beam formwork structure according to claim 5, characterized in that: The driving member (25) comprises a driving plate (27) fixedly mounted on the driving frame (22); a clamping groove (28) is provided on the sliding frame (18); a clamping block (29) is slidably connected to the driving plate (27) in a vertical direction; a return spring (30) is fixedly connected to the clamping block (29) and is fixedly connected to the driving plate (27); a side of the clamping block (29) close to the sliding frame (18) is designed as an inclined surface; a side of the clamping block (29) away from the sliding frame (18) can be clamped with the clamping groove (28); and a control member (31) for controlling the clamping state of the clamping block (29) and the clamping groove (28) is provided on the sliding frame (18).

7. The prefabricated hollow slab beam formwork structure according to claim 6, characterized in that: The control member (31) comprises a pushing block (32) slidably connected to the inner wall of the clamping groove (28) in the horizontal direction, the pushing block (32) is provided with a first inclined surface (33), the side surface of the clamping block (29) is provided with a second inclined surface (34) capable of slidingly engaging with the first inclined surface (33), any group of the rotating shafts (20) is coaxially fixedly connected with a second gear (35), and the side surface of the pushing block (32) is fixedly connected with a second rack (36) meshing with the second gear (35).

8. The prefabricated hollow slab beam formwork structure according to claim 1, characterized in that: An edge sealing plate (37) capable of being fitted with the second flip plate (3) is fixedly connected to the first flip plate (2), and a triangular plate (38) is fixedly connected to a side of the second flip plate (3) close to the first flip plate (2).

9. The prefabricated hollow slab beam formwork structure according to claim 3, characterized in that: The guide plate (4) is provided with a through hole (39), and the threaded tube (17) passes through the through hole (39) and is movably connected to the inner wall of the through hole (39).

10. The prefabricated hollow slab beam formwork structure according to claim 5, characterized in that: The driving members (25) are provided in two groups, and the two groups of driving members (25) are symmetrically distributed on the upper and lower sides of the driving shaft (9).

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