A two-way stripping structure and method for narrow space steel formwork

Abstract

The application discloses a bidirectional demolding structure and method for a narrow-space steel formwork, relates to the technical field of demolding structures, and comprises an outer formwork, a plurality of support frames are arranged at intervals on the inner side of the outer formwork; the outer formwork comprises a first outer form and a second outer form, a control assembly is arranged between the first outer form and the second outer form, and the control assembly controls the first outer form and the second outer form to move close to or away from each other; a bottom formwork is arranged on the bottom formwork, a bracket is arranged on the bottom formwork, and the bracket is connected to the bottom formwork through a connecting assembly; a side formwork comprises an upper side plate and a lower side plate, the upper side plate is connected to the outer formwork, and the lower side plate is connected to the bottom formwork; an adjusting assembly is arranged on the bracket, and the adjusting assembly controls the first outer form and the second outer form to flip in directions away from or close to the bracket; and the side formwork comprises a first baffle and a second baffle. The application can conveniently demold the steel formwork in a narrow space.

Description

Technical Field

[0001] This application relates to the technical field of demolding structures, and in particular to a two-way demolding structure and method for steel formwork in narrow spaces. Background Technology

[0002] Concrete-steel pontoons, a type of floating structure composed of steel plates and concrete, have been widely used in recent years in water-related engineering fields such as bridge construction, offshore wind power foundations, and floating wharves. This structure, with its unique advantages, provides reliable support and protection for various water-related projects, promoting the development of related engineering fields. It typically contains multiple enclosed or semi-enclosed compartments, providing sufficient buoyancy and structural strength to meet the needs of different engineering scenarios.

[0003] In previous concrete-steel pontoon construction, steel formwork was commonly used for shaping the inner cavity. Specifically, construction workers would prefabricate segmented or monolithic steel formwork according to the dimensions of the pontoon's inner cavity. Then, bolts, tie rods, and other fasteners were used to precisely position the formwork before concrete pouring. Once the concrete reached the required strength for demolding, the fasteners were removed, and the formwork was removed piece by piece from the edge. This construction method is common and feasible in conventional engineering projects.

[0004] However, in some specialized engineering projects, the internal space of concrete-steel pontoons is extremely limited. When using traditional steel formwork construction structures, the restricted space makes it difficult for operators to enter the pontoon, or even if they do, it is difficult to use their tools. This results in the formwork not being able to be properly removed after the concrete hardens. In mild cases, this can lead to permanent formwork retention and material waste; in severe cases, it can affect the forming quality and functionality of the pontoon structure. Summary of the Invention

[0005] To facilitate the removal of steel formwork in narrow spaces, this application provides a two-way demolding structure and method for steel formwork in narrow spaces.

[0006] Firstly, this application provides a two-way demolding structure for steel formwork in narrow spaces, employing the following technical solution: A two-way demolding structure for steel formwork in narrow spaces includes an outer formwork, wherein multiple support frames are spaced apart on the inner side of the outer formwork; The outer template includes a first outer mold and a second outer mold, and a control component is provided between the first outer mold and the second outer mold. The control component controls the first outer mold and the second outer mold to move closer to each other or further away from each other. A bottom template is provided at the bottom of the outer template. A bracket is provided on the bottom template, and a connecting component is provided on the bottom template. The bracket is connected to the bottom template through the connecting component. Side templates are symmetrically arranged and located on both sides of the outer template. Each side template includes an upper side plate and a lower side plate. The upper side plate is connected to the outer template, and the lower side plate is connected to the bottom template. The bracket is provided with an adjustment component, which controls the first outer mold and the second outer mold to flip in the direction away from or towards the bracket, respectively. The baffle includes a first baffle and a second baffle, the first baffle being disposed on the outside of the outer template and connecting the first outer mold and the second outer mold; The second baffle is disposed on the outside of the side template, and the second baffle connects the upper side plate and the lower side plate.

[0007] By adopting the above technical solutions, multiple support frames can enhance the structural strength of the outer formwork; the control components can control the first and second outer molds to move closer or further apart, facilitating demolding operations; the brackets are connected to the bottom formwork through connecting components, ensuring structural stability; the adjustment components can control the first and second outer molds to rotate away from or closer to the brackets, which is beneficial for the shrinkage of the side formwork; the first baffle connects the first and second outer molds, and the second baffle connects the upper and lower side plates, which can reduce concrete overflow, ensure pouring quality, and the overall structure is suitable for bidirectional demolding of steel formwork in narrow spaces, solving the problem of difficult demolding in narrow spaces.

[0008] Optionally, the control component includes a plurality of hydraulic cylinders, one end of which is connected to the first outer mold and the other end of which is connected to the second outer mold.

[0009] By adopting the above technical solution, the first and second outer molds are controlled by hydraulic cylinders to move closer or further apart, which can realize the contraction and expansion of the outer mold in a narrow space, facilitate demolding operation, reduce the problem of being unable to demold due to space constraints, and improve demolding efficiency and the reusability of the mold.

[0010] Optionally, the adjusting assembly includes a first screw, a second screw, and an adjusting threaded sleeve; The first screw is hinged to the support frame, the second screw is hinged to the bracket, the first screw and the second screw are coaxially arranged, and the two sides of the adjusting threaded sleeve are respectively threaded to the first screw and the second screw.

[0011] By adopting the above technical solution, the rotation angle of the first and second outer molds can be easily adjusted by using the threaded connection between the adjusting threaded sleeve and the first and second screws, thereby realizing the shrinkage of the side template, solving the problem of difficult demolding of the template in narrow space, reducing permanent template retention and material waste, and ensuring the molding quality and functionality of the floating box structure.

[0012] Optionally, the bottom template includes a first bottom plate and a second bottom plate, the first bottom plate and the second bottom plate being connected to the bottom and both sides of the outer template; One side of the bracket is fixed to the first base plate. The connecting assembly includes a connecting sleeve, a connecting post, and a connecting block. The connecting post is disposed on the second base plate, and the connecting sleeve is disposed on the connecting post. The side of the bracket away from the first base plate slides on the connecting sleeve. The connecting block is disposed on the bracket, and the connecting sleeve has an oblong hole for the connecting block to slide.

[0013] By adopting the above technical solution, the bracket and the bottom template can be stably connected and can slide relative to each other, which facilitates the adjustment of the template position during demolding, ensures smooth demolding in narrow spaces, and improves the overall stability of the template structure.

[0014] Optionally, the baffle is provided with a plurality of fixed posts evenly arranged along the extension direction, the baffle is provided with a fixed plate corresponding to each fixed post, the fixed plate is provided with a fixed hole for the fixed post to slide through, and a fixed nut is threaded onto the fixed post.

[0015] By adopting the above technical solution, the baffle can be effectively fixed by the cooperation of the fixed column and the fixed plate and the threaded connection of the fixed nut, thereby enhancing the stability of the bidirectional demolding structure and reducing the possibility of the baffle shifting during the demolding process and affecting the demolding operation.

[0016] Optionally, the fixing column is rotatably connected to the baffle, and a fixing sleeve is threadedly connected to the outer periphery of the fixing column, and the fixing sleeve is rotatably connected to the fixing plate; The outer periphery of the fixed sleeve is provided with a plurality of sliding teeth at even intervals, and the inner periphery of the fixed plate is provided with a plurality of connecting teeth at even intervals around the fixed sleeve. The connecting teeth mesh with the sliding teeth. When the baffle and the fixed plate stop approaching each other, the sliding teeth slide past the connecting teeth. The fixed column is provided with a driving column, and there are multiple driving columns, which are respectively connected to the opposing sides of the first outer mold and the second outer mold or the opposing sides of the upper side plate and the lower side plate; The drive column includes an inner column and an outer column. The fixed column is rotatably connected to the outer column, and the inner column is slidably connected to the outer column. The drive column is provided with a drive assembly. When the inner column slides on the outer column, the drive assembly drives the fixed column to rotate.

[0017] By adopting the above technical solution, the fixed column can be rotated, and a specific motion relationship is achieved by the cooperation of the sliding teeth and the connecting teeth. At the same time, with the help of the driving column and the driving component, the fixed column is driven to rotate when the inner column slides, which facilitates the connection and adjustment between the baffle and the fixed plate, and thus better assists the bidirectional demolding structure to complete the demolding operation in a narrow space.

[0018] Optionally, the drive assembly includes a drive gear and a drive rack. The drive rack is disposed at the end of the inner column, the drive gear is disposed on the outer periphery of the fixed column and rotatably connected to the outer column, the drive rack meshes with the drive gear, and the drive rack is slidably connected to the outer column.

[0019] By adopting the above technical solution, when the inner column slides inside the outer column, the fixed column can be rotated by the meshing of the drive rack and drive gear, thereby adjusting the connection state of the baffle-related components, which facilitates demolding operations in narrow spaces.

[0020] Optionally, the fixing plate is symmetrically and slidably connected with a straightening plate, the fixing post is located between the straightening plates, the fixing plate is rotatably connected with a bidirectional lead screw, and the straightening plate and the bidirectional lead screw are threadedly connected. A worm gear sleeve is provided on the outer periphery of the fixed column, and a worm wheel is provided on the bidirectional lead screw. The worm gear sleeve and the worm wheel are meshed together.

[0021] By adopting the above technical solution, during the rotation of the fixed column, the meshing of the worm sleeve and the worm wheel drives the bidirectional lead screw to rotate, thereby causing the straightening plate to slide on the fixed plate, which can play a corrective role for the fixed column, ensure the positional accuracy of the fixed column, and improve the stability and reliability of the bidirectional demolding structure.

[0022] Optionally, the outer periphery of the bidirectional lead screw is provided with a power tooth, the worm gear is provided with a transmission groove for the power tooth to slide, and a plurality of transmission teeth are evenly spaced along the circumferential direction on the groove wall of the transmission groove, and the power tooth meshes with the transmission tooth. When the relative straightening plates stop moving away from each other, the power tooth slides past the transmission tooth.

[0023] By adopting the above technical solution, the power transmission between the bidirectional lead screw and the worm gear can be realized by the meshing of the power teeth and the transmission teeth, so that the bidirectional lead screw can drive the worm gear to rotate. When the relative straightening plates stop moving away from each other, the power teeth slide over the transmission teeth, which can ensure that the fixed column can continue to rotate when the straightening plates stop moving.

[0024] Secondly, this application provides a two-way demolding method for steel formwork in narrow spaces, employing the following technical solution: A two-way demolding method for steel formwork in narrow spaces includes the following steps: S1: The side template shrinks, and the adjustment component controls the first outer mold and the second outer mold to flip towards the direction of the bracket; S2: The outer template shrinks, and the control component controls the first outer mold and the second outer mold to move closer to each other; S3: Demolding, which causes the bidirectional demolding structure to detach from the narrow space.

[0025] By adopting the above technical solution, the first and second outer molds are first rotated towards the bracket using the adjustment component to achieve side template shrinkage. Then, the first and second outer molds are brought closer together by the control component to achieve outer template shrinkage. Finally, the bidirectional demolding structure is driven to detach from the narrow space. This solves the problem that traditional steel formwork construction structures in narrow spaces cannot be demolded normally due to limited demolding space. It reduces permanent template retention and material waste, and ensures the forming quality and functionality of the floating box structure.

[0026] In summary, this application includes at least one of the following beneficial effects: 1. The control component can control the first and second outer molds to move closer or further apart, which facilitates the shrinkage of the outer mold in narrow spaces, achieves demolding, and reduces permanent mold placement and material waste; 2. The adjustment component can control the flipping of the first and second outer molds, which facilitates the shrinkage of the side template and solves the problem of limited demolding space in narrow spaces. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the external structure of Embodiment 1 of this application; Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of this application; Figure 3 yes Figure 2 Enlarged schematic diagram of part A; Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of this application; Figure 5 This is a schematic diagram of the internal structure of Embodiment 2 of this application; Figure 6 yes Figure 5 Enlarged schematic diagram of part B; Figure 7 This is a schematic diagram of the connection structure between the driving column and the fixed column in Embodiment 2 of this application; Figure 8 This is a schematic diagram of the connection structure between the correction plate and the fixing plate in Embodiment 2 of this application; Figure 9 This is a flowchart illustrating the demolding method in Embodiment 3 of this application.

[0028] Reference numerals: 1. Outer template; 11. First outer mold; 12. Second outer mold; 13. Support frame; 2. Hydraulic cylinder; 3. Bottom template; 31. First base plate; 32. Second base plate; 33. Bracket; 4. Connecting assembly; 41. Connecting sleeve; 411. Oblong hole; 42. Connecting column; 43. Connecting block; 5. Side template; 51. Upper side plate; 52. Lower side plate; 6. Adjusting assembly; 61. First screw; 62. Second screw; 63. Adjusting threaded sleeve; 7. Baffle; 71. 72. First baffle; 73. Second baffle; 74. Fixed column; 75. Worm sleeve; 76. Fixed plate; 77. Double-acting lead screw; 78. Worm wheel; 79. Power gear; 70. Transmission groove; 71. Transmission gear; 72. Connecting gear; 73. Drive column; 74.31. Inner column; 74.32. Outer column; 74. Straightening plate; 75. Fixed nut; 76. Fixed sleeve; 77.1. Sliding gear; 87. Drive assembly; 88. Drive gear; 89. Drive rack. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0030] This application discloses a two-way demolding structure for steel formwork in narrow spaces. Example

[0031] This application mainly adopts a two-way demolding structure and method to achieve demolding of steel formwork in narrow spaces. This enables the demolding of steel formwork to be completed smoothly even in narrow spaces, reducing the waste of formwork and materials, and ensuring the forming quality and functionality of the floating box structure. The following is a further detailed description of this application.

[0032] See Figure 1 and Figure 2 The bidirectional demolding structure for narrow-space steel formwork provided in this application embodiment includes an outer formwork 1, a bottom formwork 3, side formwork 5, and a baffle 7. Multiple support frames 13 are spaced apart on the inner side of the outer formwork 1. The outer formwork 1 is divided into a first outer mold 11 and a second outer mold 12. A control component is provided between the first outer mold 11 and the second outer mold 12 to control them to move closer or further apart. The bottom formwork 3 is located at the bottom of the outer formwork 1 and has a bracket 33. A connecting component 4 (connecting component 4 is located at...) Figure 3The outer template 1 is connected to the bottom template 3; the side templates 5 are symmetrically arranged on both sides of the outer template 1, including the upper side plate 51 and the lower side plate 52. The upper side plate 51 is connected to the outer template 1, and the lower side plate 52 is connected to the bottom template 3; the bracket 33 has an adjustment component 6, which can control the first outer template 11 and the second outer template 12 to flip away from or towards the bracket 33; the baffle 7 is divided into a first baffle 71 and a second baffle 72. The first baffle 71 is connected to the first outer template 11 and the second outer template 12 on the outside of the outer template 1, and the second baffle 72 is connected to the upper side plate 51 and the lower side plate 52 on the outside of the side template 5. This structure allows the template to be demolded smoothly in a narrow space through bidirectional contraction, reducing the problem of being unable to demold due to space constraints.

[0033] Specifically, the outer template 1 is used to form the curved or straight surface of the inner cavity of the concrete steel pontoon. In this embodiment, taking the forming of a curved surface as an example, the outer template 1 is an integral arc-shaped template. The outer template 1 includes a first outer mold 11 and a second outer mold 12 arranged opposite to each other. A straight contraction joint extending along the height direction is formed between the first outer mold 11 and the second outer mold 12. The first outer mold 11 and the second outer mold 12 are usually made of high-strength steel plates. This material has good rigidity and wear resistance and can withstand the pressure during concrete pouring. Multiple support frames 13 are fixed at intervals on the inner side of the first outer mold 11 and the second outer mold 12 (the side away from the concrete pouring). The support frames 13 can be truss structures welded from steel sections to improve the overall rigidity and load-bearing performance of the outer template 1.

[0034] A control assembly is provided between the first outer mold 11 and the second outer mold 12. This assembly controls whether the first outer mold 11 and the second outer mold 12 move closer or further apart. Preferably, the control assembly includes at least two hydraulic cylinders 2, located within the I-shaped contraction joint. One end of each hydraulic cylinder 2 is fixedly connected to the first outer mold 11, and the other end is fixedly connected to the second outer mold 12. When it is necessary to bring the first outer mold 11 and the second outer mold 12 closer together, hydraulic oil is injected into the hydraulic cylinder 2, causing it to extend. When it is necessary to move them further apart, the hydraulic oil in the hydraulic cylinder 2 is discharged, causing it to shorten. Alternatively, an adjusting bolt can be used instead of the hydraulic cylinder 2, and the same approaching or moving-away action can be achieved by rotating the bolt. This control assembly allows for the overall width of the outer mold plate 1 to be contracted or expanded; this is the demolding action in the first direction.

[0035] The bottom template 3 is located at the bottom of the outer template 1 and is used to form the bottom surface of the inner cavity. The bottom template 3 includes a first bottom plate 31 and a second bottom plate 32 arranged opposite to each other, with a gap between the first bottom plate 31 and the second bottom plate 32. The first bottom plate 31 and the second bottom plate 32 correspond to the lower edge positions of the first outer mold 11 and the second outer mold 12, respectively. The first bottom plate 31 and the second bottom plate 32 are respectively connected and fixed to the outer template 1 through connecting plates. The connecting plates are made of steel material, and the connecting plates can produce a certain deformation when the outer template 1 is flipped.

[0036] See Figure 2 and Figure 3 The bracket 33 is supported above the bottom template 3 and connected to the bottom template 3 via the connecting component 4. Specifically, one side of the bracket 33 is fixed to the first bottom plate 31, while the side of the bracket 33 away from the first bottom plate 31 is slidably connected to the second bottom plate 32 via the connecting component 4, so that the distance between the first outer mold 11 and the second outer mold 12 can adapt to changes in distance.

[0037] The connecting assembly 4 includes a connecting post 42 fixed to the second base plate 32, a connecting sleeve 41 fixed to the top of the connecting post 42, and a connecting block 43 protruding from the side wall of the bracket 33 and near its end. The side wall of the connecting sleeve 41 has a horizontally extending oblong hole 411. The connecting block 43 extends into the oblong hole 411 and can slide along it. When the outer template 1 shrinks, the bracket 33 slides on the connecting sleeve 41, and the connecting block 43 moves within the oblong hole 411, ensuring that the connection between the bottom template 3 and the outer template 1 is not affected. It also accommodates changes in the size of the outer template 1, facilitating demolding.

[0038] An adjustment assembly 6 is provided on the bracket 33. The adjustment assembly 6 is used to drive the first outer mold 11 and the second outer mold 12 to rotate towards or away from the bracket 33, respectively. Each adjustment assembly 6 includes a first screw 61, a second screw 62, and an adjustment threaded sleeve 63. The upper end of the first screw 61 is hinged to the support frame 13 inside the outer mold plate 1, and the lower end of the second screw 62 is hinged to the bracket 33. The first screw 61 and the second screw 62 are coaxially arranged, and their threads rotate in opposite directions. The two ends of the adjustment threaded sleeve 63 are threadedly connected to the first screw 61 and the second screw 62, respectively. When the adjustment threaded sleeve 63 is rotated, the first screw 61 and the second screw 62 move closer or further apart, thereby changing the distance between the support frame 13 and the bracket 33, and pushing the first outer mold 11 or the second outer mold 12 to rotate. When the adjusting component 6 drives the outer formwork 1 to retract, the outer formwork 1 flips inward toward the bracket 33; when the adjusting component 6 drives the outer formwork 1 to expand, the outer formwork 1 unfolds outward toward the direction away from the bracket 33 to the pouring position. The operation of the adjusting threaded sleeve 63 can be achieved by the operator using a wrench at the end of the formwork. This flipping action realizes the gradual separation of the outer formwork 1 from the poured concrete surface, which is the demolding action in the second direction.

[0039] There are two side templates 5 arranged symmetrically, fixed to both sides of the outer template 1, used to form the side wall plane of the inner cavity. Each side template 5 consists of an upper side plate 51 and a lower side plate 52, forming a V-shaped contraction joint between the upper side plate 51 and the lower side plate 52. The upper side plate 51 is fixedly connected to the side edge of the first outer mold 11 or the second outer mold 12 of the outer template 1 and moves synchronously with the outer template 1; the lower side plate 52 is fixedly connected to the side edge of the first bottom plate 31 or the second bottom plate 32 of the bottom template 3, maintaining relative fixation. When the outer template 1 is flipped inward under the action of the adjusting component 6, the upper side plate 51 moves with the outer template 1, creating relative misalignment with the lower side plate 52, opening the V-shaped contraction joint, thereby achieving the separation of the side template 5 from the concrete side wall.

[0040] See Figure 1 and Figure 2 To ensure the sealing of the formwork joints and the overall stability during pouring, baffles 7 are installed on the outside of the formwork. Baffles 7 include a first baffle 71 and a second baffle 72. The first baffle 71 is located on the outside of the outer formwork 1 and spans the straight-line shrinkage joint between the first outer mold 11 and the second outer mold 12; the second baffle 72 is located on the outside of the side formwork 5 and spans the V-shaped shrinkage joint between the upper side plate 51 and the lower side plate 52.

[0041] See Figure 1 and Figure 3Multiple fixing posts 73 are evenly fixedly connected to the baffle 7 along its extension direction. The template to be fixed is provided with corresponding fixing plates 74 that mate with each fixing post 73. Fixing plates 74 have fixing holes through which the fixing posts 73 slide. After passing through the fixing holes, the fixing posts 73 are threadedly connected to fixing nuts 75. By tightening the fixing nuts 75, the baffle 7 can secure adjacent templates together to withstand the pouring pressure.

[0042] The implementation principle of a two-way demolding structure for narrow space steel formwork in Embodiment 1 of this application is as follows: This bidirectional demolding structure achieves bidirectional contraction of the outer formwork 1 and the side formwork 5 through the coordinated action of the control component and the adjustment component 6. After the concrete is poured, the adjustment component 6 first controls the first outer formwork 11 and the second outer formwork 12 to rotate towards the bracket 33, causing the side formwork 5 to contract; then, the control component controls the first outer formwork 11 and the second outer formwork 12 to move closer to each other, causing the outer formwork 1 to contract; finally, the entire bidirectional demolding structure is detached from the narrow space. This structural design effectively solves the problem of steel formwork not being able to be demolded normally in narrow spaces, reduces permanent formwork retention and material waste, and ensures the forming quality and functionality of the floating box structure. Compared with traditional steel formwork construction structures, it has significant advantages and represents an improvement and innovation of existing technology. Example

[0043] See Figure 4 and Figure 5 The difference between Embodiment 2 of this application and the above embodiments is that: the fixing post 73 (the fixing post 73 is in...) Figure 6 The fixed column 73 is rotatably connected to the baffle 7, and the outer circumference of the fixed column 73 is threaded with a fixed sleeve 76 (the fixed sleeve 76 is in Figure 6 (as indicated by the mark), the fixed sleeve 76 is rotatably connected to the inside of the fixed plate 74.

[0044] See Figure 4 and Figure 6 The outer circumferential surface of the fixed sleeve 76 is uniformly spaced with a plurality of sliding teeth 761. The fixed plate 74 has a circumferentially extending receiving groove for the sliding teeth 761 to slide in. A plurality of connecting teeth 742 are uniformly spaced circumferentially on the side wall of the receiving groove. The sliding teeth 761 and the connecting teeth 742 mesh with each other. When the baffle 7 and the fixed plate 74 abut against the outer template 1 or the side template 5 respectively and stop approaching each other, the sliding teeth 761 can slide along the inclined surface of the connecting teeth 742, allowing the fixed column 73 to continue rotating. In this embodiment, the sliding teeth 761 and the connecting teeth 742 are respectively triangular tooth structures and are made of a material with elastic deformation capability, such as plastic.

[0045] See Figure 7To enable the automatic rotation of the fixed column 73, a drive column 743 is also provided on the fixed column 73. The drive column 743 includes an inner column 7431 and an outer column 7432. The outer column 7432 has a through hole for the fixed column 73 to pass through, so that the fixed column 73 and the outer column 7432 are rotatably connected. The inner column 7431 slides on the outer column 7432 and is coaxially arranged.

[0046] See Figure 4 and Figure 6 The outer ends of the drive column 743 are respectively connected and fixed to the opposing sides of the first outer mold 11 and the second outer mold 12, or the opposing sides of the upper side plate 51 and the lower side plate 52. When the outer mold plate 1 or the side mold plate 5 undergoes relative displacement, the length of the drive column 743 will change accordingly.

[0047] See Figure 7 and Figure 8 The drive column 743 is equipped with a drive assembly 8, which includes a drive gear 81 and a drive rack 82. The drive rack 82 is fixed to the end of the inner column 7431, and the drive gear 81 is fixedly installed on the outer periphery of the fixed column 73 and rotatably connected to the outer column 7432. The drive rack 82 meshes with the drive gear 81. When the inner column 7431 slides inside the outer column 7432, the drive rack 82 drives the drive gear 81 to rotate, thereby causing the fixed column 73 to rotate. The fixed column 73, through a threaded engagement with the fixed sleeve 76, drives the fixed plate 74 to move closer to or away from the outer template 1.

[0048] See Figure 7 and Figure 8 In addition, two straightening plates 744 are symmetrically slidably connected to the fixed plate 74, and the fixed post 73 is located between the two straightening plates 744. A bidirectional lead screw 741 is rotatably connected to the fixed plate 74. The bidirectional lead screw 741 includes a forward rotation part and a reverse rotation part. The two straightening plates 744 are respectively threaded to the forward rotation part and the reverse rotation part on the bidirectional lead screw 741.

[0049] See Figure 6 and Figure 7A worm gear sleeve 731 is fixed to the outer periphery of the fixed column 73, and a worm wheel 7411 meshing with it is fixed to the bidirectional lead screw 741. Multiple power teeth 7412 are evenly spaced along the circumferential direction on the outer periphery of the bidirectional lead screw 741. The worm wheel 7411 has a transmission groove 7413 for the power teeth 7412 to slide. Multiple transmission teeth 7414 are evenly spaced along the circumferential direction on the groove wall of the transmission groove 7413, and the power teeth 7412 mesh with the transmission teeth 7414. When the relative straightening plates 744 stop moving away from each other, the power teeth 7412 slide past the transmission teeth 7414. When the fixed column 73 rotates, the worm gear sleeve 731 drives the worm wheel 7411 and the bidirectional lead screw 741 to rotate, driving the two straightening plates 744 to move closer or further away synchronously, achieving automatic centering and clamping of the fixed column 73, improving the shielding effect of the baffle 7, and reducing concrete leakage. In this embodiment, the structures of the power tooth 7412 and the transmission tooth 7414 are the same as those of the sliding tooth 761 and the connecting tooth 742. They all adopt a triangular tooth structure and are made of a material with elastic deformation capability, such as plastic.

[0050] The implementation principle of a two-way demolding structure for narrow space steel formwork in Embodiment 2 of this application is as follows: In use, by driving the fixed column 73 to rotate, the fixed plate 74 and the baffle 7 move closer to each other, while the relative straightening plate 744 moves further apart. This allows the baffle 7 to better shield the steel formwork after it enters the living space, facilitating the installation of the baffle 7. At the same time, demolding is also possible; the formwork can be directly retracted during demolding, greatly reducing the difficulty of demolding. Example

[0051] See Figure 9 On the other hand, this application discloses a two-way demolding method for steel formwork in narrow spaces, comprising the following steps: S1: Side formwork 5 shrinks. First, loosen all the fixing nuts 75 on the baffles 7 to make the baffles 7 movable. Then operate the adjusting component 6, rotate the adjusting threaded sleeve 63 to shorten the distance between the first screw 61 and the second screw 62, causing the first outer mold 11 and the second outer mold 12 to flip towards the bracket 33. During the flipping process, the upper side plate 51 connected to both sides of the outer formwork 1 moves accordingly, separating from the lower side plate 52 fixed to the bottom formwork 3, and the V-shaped shrinkage joint gradually opens, realizing the separation of the side formwork 5 from the concrete.

[0052] S2: Outer formwork 1 shrinks. After the first outer formwork 11 and the second outer formwork 12 are flipped to a predetermined angle, the control assembly is operated to shorten the hydraulic cylinder 2 or rotate the adjusting bolt, driving the first outer formwork 11 and the second outer formwork 12 closer to each other. At this time, the straight shrinkage joint narrows, the overall horizontal dimension of the outer formwork 1 decreases, and the outer formwork surface completely separates from the concrete curved surface. Simultaneously, the second bottom plate 32 of the bottom formwork 3 moves outward, and the connecting block 43 slides within the oblong hole 411 of the connecting sleeve 41, maintaining bottom support.

[0053] S3: Demolding. After both the outer formwork 1 and the side formwork 5 have detached from the concrete surface, the overall dimensions of the two-way demolding structure are significantly smaller than the internal dimensions of the steel pontoon. The steel formwork can be smoothly removed from the narrow space using hoisting or traction equipment without any jamming. The demolding process is entirely operated externally using the adjustment and control components 6, eliminating the need for personnel to enter the confined internal area, ensuring safety and reliability.

[0054] The implementation principle of a two-way demolding structure for narrow space steel formwork in Embodiment 3 of this application is as follows: This two-way demolding method achieves successful demolding of steel formwork in narrow spaces by first shrinking the side formwork 5, then shrinking the outer formwork 1, and finally detaching the entire demolding structure from the narrow space. This method fully utilizes the characteristics of the two-way demolding structure and, through reasonable operating procedures, effectively solves the problem of traditional steel formwork construction structures being unable to demold in narrow spaces, improving construction efficiency and ensuring the forming quality of the floating box structure. It represents an innovation and improvement over existing demolding methods.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bidirectional demolding structure for steel formwork in narrow spaces, characterized in that: Includes an outer template (1), and multiple support frames (13) are provided at intervals on the inner side of the outer template (1); The outer template (1) includes a first outer template (11) and a second outer template (12). A control component is provided between the first outer template (11) and the second outer template (12). The control component controls the first outer template (11) and the second outer template (12) to move closer to each other or further away from each other. A bottom template (3) is set at the bottom of the outer template (1). A bracket (33) is provided on the bottom template (3). A connecting component (4) is provided on the bottom template (3). The bracket (33) is connected to the bottom template (3) through the connecting component (4). Side templates (5) are symmetrically arranged and located on both sides of the outer template (1). The side templates (5) include an upper side plate (51) and a lower side plate (52). The upper side plate (51) is connected to the outer template (1), and the lower side plate (52) is connected to the bottom template (3). An adjustment component (6) is provided on the bracket (33), and the adjustment component (6) controls the first outer mold (11) and the second outer mold (12) to flip in the direction away from or towards the bracket (33); The baffle (7) includes a first baffle (71) and a second baffle (72). The first baffle (71) is disposed on the outside of the outer template (1). The first baffle (71) connects the first outer mold (11) and the second outer mold (12). The second baffle (72) is disposed on the outside of the side template (5), and the second baffle (72) connects the upper side plate (51) and the lower side plate (52).

2. The bidirectional demolding structure for narrow-space steel formwork according to claim 1, characterized in that: The control component includes a plurality of hydraulic cylinders (2), one end of which is connected to the first outer mold (11) and the other end is connected to the second outer mold (12).

3. The bidirectional demolding structure for narrow-space steel formwork according to claim 1, characterized in that: The adjustment assembly (6) includes a first screw (61), a second screw (62), and an adjustment threaded sleeve (63). The first screw (61) is hinged to the support frame (13), and the second screw (62) is hinged to the bracket (33). The first screw (61) and the second screw (62) are coaxially arranged. The two sides of the adjusting threaded sleeve (63) are threadedly connected to the first screw (61) and the second screw (62) respectively.

4. A bidirectional demolding structure for narrow-space steel formwork according to claim 1, characterized in that: The bottom template (3) includes a first bottom plate (31) and a second bottom plate (32), the first bottom plate (31) and the second bottom plate (32) being connected to the bottom and both sides of the outer template (1); One side of the bracket (33) is fixed to the first base plate (31). The connecting assembly (4) includes a connecting sleeve (41), a connecting post (42), and a connecting block (43). The connecting post (42) is disposed on the second base plate (32), and the connecting sleeve (41) is disposed on the connecting post (42). The bracket (33) slides on the connecting sleeve (41) on the side away from the first base plate (31). The connecting block (43) is disposed on the bracket (33), and the connecting sleeve (41) has an oblong hole (411) for the connecting block (43) to slide.

5. A bidirectional demolding structure for narrow-space steel formwork according to claim 1, characterized in that: The baffle (7) is provided with a plurality of fixed posts (73) evenly arranged along the extension direction. The baffle (7) is provided with a fixed plate (74) corresponding to the fixed posts (73) one by one. The fixed plate (74) is provided with a fixed hole for the fixed posts (73) to slide through. The fixed post (73) is threaded with a fixed nut (75).

6. A bidirectional demolding structure for narrow-space steel formwork according to claim 5, characterized in that: The fixed column (73) is rotatably connected to the baffle (7), and a fixed sleeve (76) is threadedly connected to the outer periphery of the fixed column (73). The fixed sleeve (76) is rotatably connected to the fixed plate (74). The outer periphery of the fixed sleeve (76) is provided with a plurality of sliding teeth (761) evenly spaced, and the inner periphery of the fixed plate (74) is provided with a plurality of connecting teeth (742) evenly spaced around the fixed sleeve (76). The connecting teeth (742) mesh with the sliding teeth (761). When the baffle (7) and the fixed plate (74) stop approaching each other, the sliding teeth (761) slide past the connecting teeth (742). The fixed column (73) is provided with a driving column (743), and there are multiple driving columns (743) respectively connected to the opposing sides of the first outer mold (11) and the second outer mold (12) or the opposing sides of the upper side plate (51) and the lower side plate (52); The drive column (743) includes an inner column (7431) and an outer column (7432). The fixed column (73) is rotatably connected to the outer column (7432). The inner column (7431) is slidably connected to the outer column (7432). The drive column (743) is provided with a drive assembly (8). When the inner column (7431) slides on the outer column (7432), the drive assembly (8) drives the fixed column (73) to rotate.

7. A bidirectional demolding structure for narrow-space steel formwork according to claim 6, characterized in that: The drive assembly (8) includes a drive gear (81) and a drive rack (82). The drive rack (82) is disposed at the end of the inner column (7431). The drive gear (81) is disposed on the outer periphery of the fixed column (73) and rotatably connected to the outer column (7432). The drive rack (82) meshes with the drive gear (81) and is slidably connected to the outer column (7432).

8. A bidirectional demolding structure for narrow-space steel formwork according to claim 7, characterized in that: The fixing plate (74) is symmetrically and slidably connected with the straightening plate (744), the fixing column (73) is located between the straightening plates (744), the fixing plate (74) is rotatably connected with the bidirectional screw (741), and the straightening plate (744) and the bidirectional screw (741) are threadedly connected. A worm sleeve (731) is provided on the outer periphery of the fixed column (73), and a worm wheel (7411) is provided on the bidirectional lead screw (741). The worm sleeve (731) and the worm wheel (7411) mesh with each other.

9. A bidirectional demolding structure for narrow-space steel formwork according to claim 8, characterized in that: The bidirectional lead screw (741) is provided with a power tooth (7412) on its outer periphery. The worm gear (7411) is provided with a transmission groove (7413) for the power tooth (7412) to slide. Multiple transmission teeth (7414) are evenly spaced along the circumferential direction on the groove wall of the transmission groove (7413). The power tooth (7412) meshes with the transmission tooth (7414). When the relative straightening plates (744) stop moving away from each other, the power teeth (7412) slide past the transmission teeth (7414).

10. A bidirectional demolding method for steel formwork in narrow spaces, employing a bidirectional demolding structure for steel formwork in narrow spaces as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: The side template (5) shrinks, and the first outer mold (11) and the second outer mold (12) are flipped toward the bracket (33) by the adjustment component (6); S2: The outer template (1) shrinks, and the first outer mold (11) and the second outer mold (12) are controlled to move closer to each other by the control component; S3: Demolding, which causes the bidirectional demolding structure to detach from the narrow space.

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