Formwork supporting system with long and narrow closed cavity structure

Abstract

The invention relates to the technical field of building construction, and discloses a long and narrow closed cavity structure formwork system which comprises a reinforced concrete base, a reinforced concrete plate is poured on the reinforced concrete base, a plurality of supporting frames are arranged in the reinforced concrete base, and a telescopic frame is rotationally connected between every two supporting frames. The top of the supporting frame and the side, close to the reinforced concrete slab, of the supporting frame are fixedly connected with lower steel, the lower steel is provided with upper steel, and connecting rods are rotationally connected between the two ends of the lower steel and the two ends of the upper steel. At the moment, in the moving process of the mounting frame, one end of the upper steel can be driven to deviate, the upper steel is separated from the lower steel after deviating by a certain distance, and the upper steel is driven by the connecting shaft to descend after being pressed, so that force unloading is realized, and the whole supporting system can be smoothly disassembled; the problem that a traditional formwork supporting system is high in formwork removing difficulty after reinforced concrete is formed is solved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a narrow and long closed cavity structure formwork system. Background Art

[0002] Cavity concrete construction is an advanced construction technology that forms cavities in walls or structures to improve the thermal insulation and sound insulation of buildings while reducing energy consumption. During the construction of cavity concrete, the concrete structure needs to be supported to ensure that it can be completed according to the predetermined structure. When constructing cavity concrete, the base of the cavity concrete will be poured first, leaving an opening, and then the support structure will be set up in the concrete cavity that has been constructed first through the opening. After the support structure is set up, a support formwork with the same size and shape as the opening is placed on the support structure. Then, the remaining reinforced concrete is poured on the base of the reinforced concrete using the support formwork as the base surface, and the reinforced concrete of this part is supported by the support structure and the support formwork. After the reinforced concrete solidifies, the formwork system in the cavity can be dismantled; The traditional concrete cavity support system usually uses formwork square wood to make wooden boxes as the internal cavity formwork system. However, for some special reinforced concrete cavity structures, since other areas except the side walls are closed, the space inside the cavity is small and people cannot enter, and the length is long, which makes it difficult to reinforce the formwork at one time, especially the difficulty of removing the formwork after forming. Therefore, we propose a narrow and long closed cavity structure formwork system. Summary of the invention

[0003] The object of the present invention is to provide a narrow and long closed cavity structure formwork system to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a narrow and long closed cavity structure formwork system, comprising a reinforced concrete seat, a reinforced concrete slab is cast on the reinforced concrete seat, the inner side wall and the inner top wall of the reinforced concrete slab are provided with supporting formwork, a plurality of support frames are provided in the reinforced concrete seat, each of the support frames is rotatably connected with a telescopic frame, the top of the support frame and the side close to the reinforced concrete slab are fixedly connected with lower steel, upper steel is provided on the lower steel, connecting rods are rotatably connected between the two ends of the lower steel and the upper steel, and a rough plate is fixedly connected to the upper steel close to the reinforced concrete slab; One side of the support frame is fixedly connected to a mounting frame, a guide groove is provided on the mounting frame, a limit groove connected to the guide groove is provided at the top of the guide groove, a transmission frame is slidably connected in the guide groove, a mounting rod is fixedly connected to the side of the transmission frame away from the support frame, a slidably connected dust box is clamped at the top of the mounting rod, the dust box is located above the rough plate, a scraper is fixedly connected to the top of the dust box, and one side of the dust box is fixed to the mounting rod by bolts.

[0005] Preferably, the bottom of the dust collecting box is fixedly connected to a limiting frame, and limiting holes are provided on the inner walls on both sides of the limiting frame. A winding rod B is rotatably connected between the limiting holes, and a torsion spring C is fixedly connected between the two ends of the winding rod B and the inner walls of the limiting holes on the same side thereof. A dustproof film is wound on the winding rod B, and the dustproof film covers the rough plate.

[0006] Preferably, a fixing frame is fixedly connected to the bottom of the support frame close to the reinforced concrete slab, and one end of the dustproof film away from the winding rod B is fixedly connected to the fixing frame.

[0007] Preferably, a fixing groove is provided on the transmission frame, and mounting holes are provided on the inner walls on both sides of the fixing groove, a winding rod A is rotatably connected between the mounting holes, and a torsion spring B is fixedly connected between the two ends of the winding rod A and the inner walls of the mounting holes on the same side thereof.

[0008] Preferably, an elastic rope is fixedly connected to the inner bottom wall of the guide groove, and the top end of the elastic rope is wound around the winding rod A.

[0009] Preferably, a plurality of installation grooves are provided on the lower steel and the upper steel, the opening directions of the installation grooves of the lower steel and the upper steel are opposite, and the installation grooves at corresponding positions on the lower steel and the upper steel are connected to each other.

[0010] Preferably, fixing rings are fixedly connected on both sides of the inner wall of the installation groove, a rotating rod is rotatably connected between the fixing rings in each installation groove, a torsion spring A is fixedly connected between the two ends of the rotating rod and the inner wall of the fixing ring on the same side, and a connecting rod is rotatably connected between the rotating rods in the corresponding installation grooves between the lower steel and the upper steel.

[0011] Preferably, a mounting plate is fixedly connected to the side of the lower steel away from the connecting rod, a plurality of spring telescopic rods are fixedly connected to the top of the mounting plate, a top plate is fixedly connected between the tops of the spring telescopic rods, and the top of the top plate is flush with the top of the lower steel.

[0012] Preferably, the bottom of the support frame and one side close to the inner wall of the reinforced concrete seat are rotatably connected with a plurality of universal wheels, and the universal wheels are respectively fitted with the inner wall and inner bottom wall on the same side of the reinforced concrete seat.

[0013] Preferably, the structure of the support frame is the same as the inner structure of the reinforced concrete seat and the reinforced concrete slab, and a support rod is arranged in the middle of the support frame for reinforcement.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention cooperates with multiple retractable support frames, so that the multiple support frames can be adjusted according to the length of the reinforced concrete cavity, and the multiple support frames are used to support the inner wall of the reinforced concrete. When dismantling, the support frame at the outer end is pulled outward through the concrete cavity. At this time, the installation frame will drive one end of the upper steel to deviate during the movement. After the displacement is a certain distance, the upper steel is separated from the lower steel, and driven by the connecting shaft, the upper steel will drop after being under pressure, thereby realizing force unloading, so that the entire support system can be dismantled smoothly, avoiding the problem that the traditional formwork system is extremely difficult to dismantle after the reinforced concrete is formed, and effectively improving the auxiliary function of the device during dismantling; 2. When placing the support template of the present invention, the support template will squeeze the dust box. At this time, the transmission frame is moved from the limit groove to the guide groove through the dust box and the mounting rod. At this time, the elastic rope starts to rebound and the transmission frame moves downward along the guide groove. In this process, the scraper will scrape the part of the bottom of the support template that contacts the upper steel, clean up the gravel attached to the bottom of the support template, and avoid the gravel attached to the bottom of the support template, which will reduce the friction between the support template and the upper steel, affecting the subsequent support stability. 3. When the dust box of the present invention moves downward, it will drive the limit frame to move together. At this time, when the limit frame moves, the resilience of the torsion spring C can drive the winding rod B to rotate, thereby winding up the dustproof film and exposing the rough plate attached to the steel on the upper side of the support frame. Then, the support template is brought into contact with the rough plate. The rough particles on the surface of the rough plate can increase the friction between the support template and the support template, thereby further improving the stability of the device when placing the support template.

[0015] 4. In the present invention, when the upper steel is offset, it will move to the top plate. At this time, when the upper steel is squeezed by the inner wall of the reinforced concrete slab, it will sink and cause the spring telescopic rod to contract. When the support frame moves out of the cavity between the reinforced concrete seat and the reinforced concrete slab, the spring telescopic rod begins to rebound and lifts the upper steel to the initial height. After that, the torsion spring A, the rotating rod and the connecting rod cooperate with each other to make the upper steel begin to translate toward the upper side of the lower steel until the upper steel moves to the top of the lower steel. After the device is moved out of the reinforced concrete cavity, the upper steel can be automatically reset, which improves the auxiliary function of the device for construction personnel to reset the device at a later time. At the same time, the rotating rod, the torsion spring A and the connecting rod can increase the stability between the upper steel and the lower steel to a certain extent, avoiding the vibration force generated during the construction process, which causes the upper steel to automatically shift, resulting in affecting the subsequent support stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the reinforced concrete seat of the present invention; Figure 3 It is a schematic diagram of the connection structure between multiple support frames of the present invention; Figure 4 It is a schematic diagram of the structure of the cavity between the reinforced concrete and the reinforced concrete slab of the present invention; Figure 5 This is a schematic diagram of the structure of the mounting frame and its connecting components of the present invention; Figure 6 This is a schematic diagram of the mounting frame structure of the present invention; Figure 7 It is a schematic diagram of the connection structure between the transmission frame and the dust collection box of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the transmission frame of the present invention; Fig. 9 It is a schematic diagram of the structure of the dust collecting box of the present invention; Fig.10 It is a schematic diagram of the cross-sectional structure of the limiting frame of the present invention; Fig.11 This is a schematic diagram of the connection structure of the upper steel and the lower steel of the present invention; Fig.12 It is a schematic diagram of the cross-sectional structure of the upper steel and the lower steel of the present invention; Fig.13 It is a schematic diagram of the structure of the rotating rod and the connecting rod of the present invention; Fig.14 For the present invention Fig.10 A schematic diagram of the enlarged structure of area A is shown.

[0017] In the figure: 1. reinforced concrete seat; 11. reinforced concrete slab; 12. supporting formwork; 2. supporting frame; 21. telescopic frame; 22. universal wheel; 3. lower steel; 31. upper steel; 32. connecting rod; 33. mounting groove; 34. fixing ring; 35. rotating rod; 36. torsion spring A; 37. connecting rod; 38. rough plate; 4. mounting plate; 41. spring telescopic rod; 42. top plate; 5. mounting frame; 51. guide groove; 52. limiting groove; 53. elastic rope; 6. transmission frame; 61. fixing groove; 62. mounting hole; 63. winding rod A; 64. torsion spring B; 65. mounting rod; 7. dust box; 71. scraper; 72. bolt; 8. limiting frame; 81. limiting hole; 82. winding rod B; 83. torsion spring C; 84. dustproof film; 85. fixing frame. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-14 The present invention provides a technical solution: a narrow and long closed cavity structure formwork system, comprising a reinforced concrete seat 1, a reinforced concrete slab 11 is cast on the reinforced concrete seat 1, and support templates 12 are arranged on the inner side wall and the inner top wall of the reinforced concrete slab 11. The surface of the support template 12 is smooth and neat, which can further improve the flatness of the reinforced concrete slab 11 during casting. After the reinforced concrete slab 11 is cast, the support template 12 does not need to be removed and can be directly left in the cavity. A plurality of support frames 2 are arranged in the reinforced concrete seat 1. The structure of the support frame 2 is the same as the inner cavity structure of the reinforced concrete seat 1 and the reinforced concrete slab 11. A support rod is arranged in the middle of each support frame 2 for reinforcement. A telescopic frame 21 is rotatably connected between each support frame 2. The bottom of the support frame 2 and the side close to the inner wall of the reinforced concrete seat 1 are rotatably connected with a plurality of universal wheels 22. The universal wheels 22 are respectively fitted with the inner wall and the inner bottom wall on the same side of the reinforced concrete seat 1. The friction between the support frame 2 and the inner wall of the reinforced concrete seat 1 can be reduced by the universal wheels 22, making it easier and more labor-saving to move the support frame 2.

[0020] Furthermore, the reinforced concrete seat 1 is a structure to be constructed first. After its construction is completed, the support frame 2 is placed in the reinforced concrete seat 1, and multiple support frames 2 are pulled in sequence according to the inner cavity length of the reinforced concrete seat 1. Through the cooperation of the telescopic frame 21, the multiple support frames 2 are stretched so that the multiple support frames 2 are evenly arranged in the reinforced concrete seat 1. Then, the support formwork 12 is placed on the support frame 2 through the reserved opening on the reinforced concrete seat 1, and then the reinforced concrete slab 11 can be poured.

[0021] Combined with Figure 3 , Fig.11 , Fig.12 and Fig.13 As shown, the top of the support frame 2 and the side close to the reinforced concrete slab 11 are fixedly connected with the lower steel 3, the support frame 2 and the lower steel 3 are connected by a mortise and tenon structure, a convex point is set on the support frame 2, and a concave point is set under the lower steel 3 to facilitate the fixing and removal between the two, an upper steel 31 is set on the lower steel 3, and a connecting rod 32 is rotatably connected between the two ends of the lower steel 3 and the upper steel 31, and a plurality of mounting grooves 33 are opened on the lower steel 3 and the upper steel 31, and the opening directions of the mounting grooves 33 of the lower steel 3 and the upper steel 31 are opposite, and the mounting grooves 33 at corresponding positions on the lower steel 3 and the upper steel 31 are connected to each other, and the inner walls of the mounting grooves 33 are fixedly connected with fixing rings 34 on both sides, and the fixing rings 34 in each mounting groove 33 are rotatably connected with a rotating rod 35, and the two ends of the rotating rod 35 are fixedly connected with the inner wall of the fixing ring 34 on the same side thereof. The top of the top plate 42 is flush with the top of the lower steel 3, and the spring telescopic rod 41 is composed of a spring and a telescopic rod. The maximum telescopic degree of the spring can be limited by the telescopic rod. When the upper steel 31 moves to the top plate 42, the height of the upper steel 31 can be limited by the spring telescopic rod 41 without affecting the sinking operation of the upper steel 31. When the support frame 2 moves out of the cavity between the reinforced concrete seat 1 and the reinforced concrete slab 11, the resilience of the spring telescopic rod 41 can drive the upper steel 31 to be lifted, so that the bottom surface of the upper steel 31 is flush with the top surface of the lower steel 3, which is convenient for the upper steel 31 to move to the top of the lower steel 3 to complete the reset work.

[0022] Furthermore, after the reinforced concrete slab 11 is poured, when the support frame 2 needs to be removed, the outermost support frame 2 is pulled through the opening at one end of the reinforced concrete seat 1 and the reinforced concrete slab 11, and the remaining support frames 2 are moved out of the cavity between the reinforced concrete seat 1 and the reinforced concrete slab 11 by pulling the support frame 2. In this process, since the upper steel 31 is in contact with the support formwork 12, and the support formwork 12 has been fixed to the reinforced concrete slab 11, when the support frame 2 moves, the friction between the upper steel 31 and the support formwork 12 can cause the upper steel 31 to deviate to the top plate 42. In this process, the rotating rod 35 and the connecting rod 37 can be rotated by the force generated when the upper steel 31 moves, and The torsion spring A36 is tightened. At this time, the upper steel 31 will sink after being subjected to pressure, and squeeze the spring telescopic rod 41, causing the spring telescopic rod 41 to shrink. When the support frame 2 moves out of the cavity between the reinforced concrete seat 1 and the reinforced concrete slab 11, the pressure on the upper steel 31 disappears. At this time, the spring telescopic rod 41 begins to rebound, and drives the upper steel 31 to start rising through the top plate 42, so that the bottom surface of the upper steel 31 is flush with the top surface of the lower steel 3. At this time, the torsion spring A36 begins to rebound and drives the rotating rod 35 to rotate. At this time, the rotating rotating rod 35 and the connecting rod 37 cooperate to drive the upper steel 31 to move to the top of the lower steel 3, completing the automatic reset work, which is convenient for directly supporting the next reinforced concrete cavity.

[0023] Combined with Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.14As shown, a rough plate 38 is fixedly connected to the upper steel 31 near one side of the reinforced concrete slab 11, and a plurality of protruding particles are arranged on the surface of the rough plate 38. Through these protruding particles, the friction between the rough plate 38 and the support formwork 12 can be increased, and the stability between the rough plate 38 and the support formwork 12 can be improved. A mounting frame 5 is fixedly connected to one side of the support frame 2, and a guide groove 51 is provided on the mounting frame 5. A limiting groove 52 connected to the guide groove 51 is provided at the top of the guide groove 51. A transmission frame 6 is slidably connected in the guide groove 51, and a fixing groove 61 is provided on the transmission frame 6. The inner walls on both sides of the fixing groove 61 are provided with There are mounting holes 62, between which a winding rod A63 is rotatably connected, and between the two ends of the winding rod A63 and the inner wall of the mounting hole 62 on the same side thereof, a torsion spring B64 is fixedly connected, and an elastic rope 53 is fixedly connected to the inner bottom wall of the guide groove 51, and the top end of the elastic rope 53 is wound around the winding rod A63, and a mounting rod 65 is fixedly connected to the side of the transmission frame 6 away from the support frame 2, and a dust box 7 is slidably connected to the top end of the mounting rod 65, and the dust box 7 is located above the rough plate 38, and a scraper 71 is fixedly connected to the top of the dust box 7, and one side of the dust box 7 is connected to the mounting rod 65 by a bolt 72. The dust box 7 can be easily disassembled and installed by bolts 72. When the support frame 2 is moved out of the cavity between the reinforced concrete seat 1 and the reinforced concrete slab 11, the bolts 72 can be rotated to remove the dust box 7, and the sand and dust collected inside it can be cleaned. Then it can be re-clamped on the installation rod 65 and fixed by bolts 72, so that it can be used repeatedly. The bottom of the dust box 7 is fixedly connected to the limiting frame 8, and the inner walls on both sides of the limiting frame 8 are provided with limiting holes 81. A winding rod B82 is rotatably connected between the limiting holes 81, and the two ends of the winding rod B82 are connected to the limiting holes on the same side. A torsion spring C83 is fixedly connected between the inner walls of 81, and a dust-proof film 84 is rolled up on the winding rod B82. The dust-proof film 84 covers the rough plate 38. The rough plate 38 can be covered and protected by the dust-proof film 84 to prevent the gravel attached to the bottom surface of the support formwork 12 from falling on the surface of the rough plate 38 when the scraper 71 cleans the gravel attached to the bottom surface of the support formwork 12, thereby affecting the stability between the rough plate 38 and the support formwork 12. A fixing frame 85 is fixedly connected to the bottom of the support frame 2 close to the reinforced concrete slab 11, and the end of the dust-proof film 84 away from the winding rod B82 is fixedly connected to the fixing frame 85.

[0024] Furthermore, before use, the transmission frame 6 is manually pulled to move it from the guide groove 51 to the limit groove 52. During this process, the winding rod A63 can loosen the elastic rope 53, and the force generated by the loosening drives the winding rod A63 to rotate, and the winding rod A63 drives the torsion spring B64 to tighten. During this process, the transmission frame 6 will drive the dust box 7 and the limit frame 8 to move together through the installation rod 65. At this time, the winding rod B82 on the limit frame 8 can loosen the dustproof film 84, and the force generated by the loosening drives the winding rod B82 to rotate, and through the rotation The movable winding rod B82 drives the torsion spring C83 to be tightened. At this time, the dustproof film 84 covers the rough plate 38 to protect the rough plate 38 from dust. When the transmission frame 6 moves into the limiting groove 52, the elastic rope 53 can be used to make it tightly fit on the inner wall of the limiting groove 52, and the temporary limiting function of the transmission frame 6 is completed. When the support template 12 is placed on the support frame 2, the support template 12 will first contact the scraper 71 on the dust box 7. At this time, the support template 12 will apply a certain pressure to the dust box 7, and the pressure is transmitted to the transmission frame 6 through the installation rod 65. The transmission frame 6 moves from the limiting groove 52 to the guide groove 51. At this time, the transmission frame 6 will slide along the guide groove 51 to the bottom of the mounting frame 5. During this process, the torsion spring B64 starts to rebound, driving the winding rod A63 to rotate, and the winding rod A63 is used to wind up the elastic rope 53. During the movement of the transmission frame 6, the dust box 7 and the limiting frame 8 can be driven to move together. During the movement of the dust box 7, the scraper 71 can be used to clean the gravel attached to the bottom of the supporting template 12. The scraped gravel will fall into the dust box 7 for temporary storage, and the limiting frame 8 is in the process of moving. In the process, the limit of the torsion spring C83 disappears, and it starts to rebound, driving the winding rod B82 to rotate. At this time, the dust film 84 can be rolled up by the rotating winding rod B82, and the rough plate 38 is exposed. When the transmission frame 6 moves to the bottom end of the guide groove 51, the dust box 7 will move away from the top of the rough plate 38. At this time, the support template 12 can contact the rough plate 38 on the steel 31 above the side of the support frame 2. In the subsequent support work, the rough particles on the surface of the rough plate 38 can increase the friction between it and the support template 12, thereby improving the stability between it and the support template 12. It is worth noting that the lengths of the inclined lower steel 3 and upper steel 31 on the side of the support frame 2 are greater than the lower steel 3 and upper steel 31 on the top of the support frame 2. Therefore, it is only necessary to add a rough plate 38 to the upper steel 31 on the side of the support frame 2 to make the contact area between the rough plate 38 and the support template 12 larger, thereby providing stability to the entire support frame 2 and the support template 12. The lower steel 3 and upper steel 31 located at the top of the support frame 2 have a smaller contact area, so they will not affect the stability between the entire support frame 2 and the support template 12.

[0025] Working principle: First, the reinforced concrete base 1 is cast. After the reinforced concrete base 1 solidifies, the reinforced concrete slab 11 can be cast. Before the construction, the transmission frame 6 is manually pulled to move it from the guide groove 51 to the limit groove 52. During this process, the winding rod A63 can loosen the elastic rope 53, and the force generated by the loosening drives the winding rod A63 to rotate, and the winding rod A63 drives the torsion spring B64 to tighten. During this process, the transmission frame 6 will drive the dust box 7 through the installation rod 65. The rolling rod B82 on the limit frame 8 can loosen the dustproof film 84, and the force generated by the loosening drives the rolling rod B82 to rotate, and the rotating rolling rod B82 drives the torsion spring C83 to tighten, and the dustproof film 84 covers the rough plate 38 to protect the rough plate 38 from dust. When the transmission frame 6 moves into the limit groove 52, the elastic rope 53 can be used to make it fit tightly on the inner wall of the limit groove 52, and the temporary limit function of the transmission frame 6 is completed. Then, according to the inner cavity length of the reinforced concrete seat 1, the multiple support frames 2 are pulled in sequence, and the multiple support frames 2 are stretched through the cooperation of the telescopic frame 21, so that the multiple support frames 2 are evenly arranged in the reinforced concrete seat 1, and then the support formwork 12 is placed on the support frame 2 through the reserved opening on the reinforced concrete seat 1; When the support template 12 is placed on the support frame 2, the support template 12 will first contact the scraper 71 on the dust box 7. At this time, the support template 12 will apply a certain pressure to the dust box 7, and transmit the pressure to the transmission frame 6 through the installation rod 65, and move the transmission frame 6 from the limit groove 52 to the guide groove 51. At this time, the transmission frame 6 will slide along the guide groove 51 to the bottom of the installation frame 5. During this process, the torsion spring B64 begins to rebound, driving the winding rod A63 to rotate, and the winding rod A63 is used to wind up the elastic rope 53. During the movement of the transmission frame 6, it can drive the dust box 7 and the limit frame 8 to move together. During the movement of the dust box 7, the scraper 71 can be used to clean the gravel attached to the bottom of the support template 12, and the scraped gravel will fall into the dust box 7 for temporary storage. During the movement of the limit frame 8, the limit of the torsion spring C83 disappears, and the limit frame 8 begins to rebound, driving the winding rod B82 to rotate. At this time, the dust film 84 can be rolled up by the rotating winding rod B82, and the rough plate 38 is exposed. When the transmission frame 6 moves to the bottom end of the guide groove 51, the dust box 7 will move away from the top of the rough plate 38, and the support template 12 can contact the rough plate 38 on the steel 31 above the side of the support frame 2. Afterwards, the reinforced concrete slab 11 is poured on the support formwork 12. When the reinforced concrete slab 11 is poured and solidified, the outermost support frame 2 is pulled through the reinforced concrete seat 1 and the opening at one end of the reinforced concrete slab 11. By pulling the support frame 2, the remaining support frames 2 are driven to move out of the cavity between the reinforced concrete seat 1 and the reinforced concrete slab 11. In this process, since the upper steel 31 is in contact with the support formwork 12, and the support formwork 12 is fixed to the reinforced concrete slab 11, when the support frame 2 moves, the upper steel 31 can be offset to the top plate 42 through the friction between the upper steel 31 and the support formwork 12. In this process, the rotating rod 35 and the connecting rod 37 can generate the force when the upper steel 31 moves. The spring 41 is rotated and the torsion spring A36 is tightened. At this time, the upper steel 31 will sink after being subjected to pressure, and squeeze the spring telescopic rod 41, so that the spring telescopic rod 41 is contracted. When the support frame 2 moves out of the cavity between the reinforced concrete seat 1 and the reinforced concrete slab 11, the pressure on the upper steel 31 disappears. At this time, the spring telescopic rod 41 begins to rebound, and drives the upper steel 31 to start to rise through the top plate 42, so that the bottom surface of the upper steel 31 is flush with the top surface of the lower steel 3. At this time, the torsion spring A36 begins to rebound and drives the rotating rod 35 to rotate. At this time, the rotating rotating rod 35 and the connecting rod 37 cooperate to drive the upper steel 31 to move to the top of the lower steel 3, completing the automatic resetting work, which is convenient for directly supporting the next reinforced concrete cavity.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A formwork system for a narrow and long closed cavity structure, comprising a reinforced concrete seat (1), a reinforced concrete slab (11) cast on the reinforced concrete seat (1), and support formwork (12) provided on the inner side wall and the inner top wall of the reinforced concrete slab (11), characterized in that: A plurality of support frames (2) are arranged in the reinforced concrete seat (1), and each of the support frames (2) is rotatably connected to a telescopic frame (21), and the top of the support frame (2) and the side close to the reinforced concrete slab (11) are fixedly connected to a lower steel (3), and an upper steel (31) is arranged on the lower steel (3), and connecting rods (32) are rotatably connected between the two ends of the lower steel (3) and the upper steel (31), and a rough plate (38) is fixedly connected to the upper steel (31) on the side close to the reinforced concrete slab (11); A mounting frame (5) is fixedly connected to one side of the support frame (2); a guide groove (51) is provided on the mounting frame (5); a limit groove (52) communicating with the guide groove (51) is provided at the top end of the guide groove (51); a transmission frame (6) is slidably connected in the guide groove (51); a mounting rod (65) is fixedly connected to the side of the transmission frame (6) away from the support frame (2); a slidably connected dust box (7) is clamped at the top end of the mounting rod (65); the dust box (7) is located above the rough plate (38); a scraper (71) is fixedly connected to the top of the dust box (7); and one side of the dust box (7) is fixed to the mounting rod (65) by a bolt (72).

2. A narrow and long closed cavity structure formwork system according to claim 1, characterized in that: The bottom of the dust collecting box (7) is fixedly connected to a limiting frame (8), and limiting holes (81) are provided on the inner walls of both sides of the limiting frame (8), and a winding rod B (82) is rotatably connected between the limiting holes (81), and a torsion spring C (83) is fixedly connected between the two ends of the winding rod B (82) and the inner walls of the limiting holes (81) on the same side thereof, and a dustproof film (84) is wound on the winding rod B (82), and the dustproof film (84) covers the rough plate (38).

3. A narrow and long closed cavity structure formwork system according to claim 2, characterized in that: A fixing frame (85) is fixedly connected to the bottom of the support frame (2) on the side close to the reinforced concrete slab (11), and one end of the dustproof film (84) away from the winding rod B (82) is fixedly connected to the fixing frame (85).

4. The formwork system for a narrow and long closed cavity structure according to claim 1, characterized in that: The transmission frame (6) is provided with a fixing groove (61), and the inner walls on both sides of the fixing groove (61) are provided with mounting holes (62), a winding rod A (63) is rotatably connected between the mounting holes (62), and a torsion spring B (64) is fixedly connected between the two ends of the winding rod A (63) and the inner walls of the mounting holes (62) on the same side thereof.

5. The formwork system for a narrow and long closed cavity structure according to claim 4, characterized in that: An elastic rope (53) is fixedly connected to the inner bottom wall of the guide groove (51), and the top end of the elastic rope (53) is wound around a winding rod A (63).

6. The narrow and long closed cavity structure formwork system according to claim 1, characterized in that: A plurality of mounting grooves (33) are provided on the lower steel (3) and the upper steel (31); the mounting grooves (33) of the lower steel (3) and the upper steel (31) have opening directions opposite to each other; and the mounting grooves (33) at corresponding positions on the lower steel (3) and the upper steel (31) are connected to each other.

7. The formwork system for a narrow and long closed cavity structure according to claim 6, characterized in that: Both sides of the inner wall of the installation groove (33) are fixedly connected with a fixing ring (34), and a rotating rod (35) is rotatably connected between the fixing rings (34) in each installation groove (33). A torsion spring A (36) is fixedly connected between the two ends of the rotating rod (35) and the inner wall of the fixing ring (34) on the same side thereof, and a connecting rod (37) is rotatably connected between the rotating rods (35) in the corresponding installation grooves (33) between the lower steel (3) and the upper steel (31).

8. The formwork system for a narrow and long closed cavity structure according to claim 7, characterized in that: A mounting plate (4) is fixedly connected to a side of the lower steel (3) away from the connecting rod (32); a plurality of spring telescopic rods (41) are fixedly connected to the top of the mounting plate (4); a top plate (42) is fixedly connected between the tops of the spring telescopic rods (41); and the top of the top plate (42) is flush with the top of the lower steel (3).

9. The narrow and long closed cavity structure formwork system according to claim 1, characterized in that: The bottom of the support frame (2) and one side close to the inner wall of the reinforced concrete seat (1) are both rotatably connected with a plurality of universal wheels (22), and the universal wheels (22) are respectively fitted with the inner wall and inner bottom wall on the same side of the reinforced concrete seat (1).

10. The narrow and long closed cavity structure formwork system according to claim 1, characterized in that: The structure of the support frame (2) is the same as the inner cavity structure of the reinforced concrete seat (1) and the reinforced concrete slab (11), and a support rod is arranged in the middle of the support frame (2) for reinforcement.

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