A kind of prefabricated staircase without stripping mode, manufacturing device and construction method

Abstract

The present invention discloses a prefabricated staircase, a manufacturing device and a construction method for a free-detachment mode, which solves the problem that the stress-bearing steel bars at the bottom of the prefabricated staircase are easily offset and the vibration is uneven during the vibration process, and solves the problem of uneven local stress and local damage of the prefabricated staircase by eliminating the need for demolding; the technical scheme includes: a steel cage and a staircase protective layer assembly; the staircase protective layer assembly is arranged on the outside of the steel cage, and a buckle is arranged on the side of the staircase protective layer assembly close to the steel cage, which is used to clamp the staircase protective layer assembly on the steel cage, and concrete is poured inside the staircase protective layer assembly and solidified into one with the steel cage. The top crossbeam of the steel frame and the middle crossbeam of the steel frame of the staircase fixer are fixedly connected to the steel frame column, and a rotating disk is rotatably arranged on the middle crossbeam of the steel frame, and two slide groove limit plates are arranged on the rotating disk, and a fixed splint is arranged between the two slide groove limit plates.

Description

Technical Field

[0001] The present invention belongs to the technical field of prefabricated construction of construction projects, and specifically relates to a free-detachment mode prefabricated staircase, a manufacturing device and a construction method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Compared with traditional cast-in-place integral stairs, prefabricated stairs have higher production efficiency and better environmental performance. According to the construction process, the construction and pouring of prefabricated stairs are divided into pouring on the bottom and pouring on the side; the advantage of pouring on the bottom is that it is convenient for vibration and the vibration is more uniform, but the vibration process is easy to cause the stress-bearing steel bars at the bottom of the prefabricated stairs to shift, resulting in the concrete protective layer of the stairs being too large or too small, thereby affecting the bearing capacity or durability of the stairs; when pouring on the side, the thickness of the protective layer is easy to control due to the setting of pads, but it makes it difficult for the vibrator to reach the bottom, resulting in uneven concrete vibration; no matter which side the prefabricated stairs are poured, it is easy to cause uneven stress on the local part of the prefabricated stairs when the formwork is removed, resulting in local damage; and the prefabricated stairs should be with the step surface facing up and the bottom surface facing down during the hoisting process, so before hoisting, the stairs must be hoisted through the reserved hoisting points to the step surface facing up, and in this process, it is very easy to cause the overall stress of the prefabricated stairs to be uneven and crack. Summary of the invention

[0004] In view of the above problems, the present invention provides a prefabricated staircase, a manufacturing device and a construction method in a non-detachable mode, which solves the problem that the stress-bearing steel bars at the bottom of the prefabricated staircase are easily offset during the vibration process, and the problem of uneven concrete vibration is caused. The prefabricated staircase is not subjected to uneven stress locally, causing local damage and

[0005] The problem of prefabricated stairs cracking due to uneven overall stress.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In the first aspect, the present invention provides a prefabricated staircase in a free-detachment mode, comprising: a steel cage and a staircase protective layer assembly; the inner side of the staircase protective layer assembly is a rough surface; the staircase protective layer assembly is arranged on the outer side of the steel cage, and a buckle is provided on the side of the staircase protective layer assembly close to the steel cage, which is used to clip the staircase protective layer assembly to the steel cage, concrete is poured inside the staircase protective layer assembly, and the steel cage and the staircase protective layer assembly are solidified as one.

[0008] Furthermore, the staircase protective layer assembly is composed of staircase platform side assembly, staircase platform end assembly, staircase platform bottom assembly, staircase platform top assembly, staircase inclined section bottom assembly, staircase inclined section side assembly and prefabricated staircase treads. The prefabricated staircase treads are arranged above the inclined section of the steel cage, the staircase inclined section bottom assembly is arranged below the inclined section of the steel cage, the staircase inclined section side assembly is arranged on the side of the inclined section of the steel cage, the staircase platform side assembly is arranged on the side of the horizontal section of the steel cage, the staircase platform side assembly is arranged above the horizontal section of the steel cage, the staircase platform end assembly is arranged at the end of the horizontal section of the steel cage, the staircase platform bottom assembly is arranged below the horizontal section of the steel cage, and the staircase platform side assembly is arranged on the side of the horizontal section of the steel cage.

[0009] Furthermore, there are multiple and evenly distributed clips arranged on the side panels of the stair platform, the end panels of the stair platform, the bottom panels of the stair platform, the top panels of the stair platform, the bottom panels of the stair inclined section, the side panels of the stair inclined section and the prefabricated stair treads close to the side of the steel cage.

[0010] Furthermore, the buckle is composed of two arc-shaped cards, one end of the two arc-shaped cards is hinged and fixedly connected to the inside of the stair protective layer assembly through a hinge seat, and the other end of the two arc-shaped cards is provided with a wedge-shaped lock buckle for locking the steel bar in the circular ring formed by the two arc-shaped cards.

[0011] In the second aspect, the present invention also provides a manufacturing device for prefabricated stairs in a free-slip mode, comprising: a first staircase fixer and a second staircase fixer, the first staircase fixer and the second staircase fixer having the same structure; the first staircase fixer is composed of two steel frame columns, a steel frame top crossbeam and a steel frame middle crossbeam, the two ends of the steel frame top crossbeam are fixedly connected to the tops of the two steel frame columns, the two ends of the steel frame middle crossbeam are fixedly connected to the middles of the two steel frame columns, a rotating disk is rotatably provided on the steel frame middle crossbeam, two slide groove limit plates are provided on the rotating disk, two fixed splints are provided between the two slide groove limit plates, the two ends of the fixed splints can be slidably provided in the slide grooves of the slide groove limit plates, for placing the steel cage and stair protective layer assembly of the prefabricated stairs; a driving wheel is also provided on the steel frame column, and the driving wheel is used to drive the rotating disk to rotate.

[0012] Furthermore, the transmission mode between the driving wheel and the rotating disk is belt drive or chain drive.

[0013] Furthermore, the driving wheel on the first staircase fixture and the driving wheel on the second staircase fixture rotate synchronously through a transmission shaft, and a driving motor is provided on one side of the driving wheel on the first staircase fixture to provide power for the entire device.

[0014] Furthermore, the middle cross beam of the steel frame is connected to the rotating disk via a rotating shaft, the rotating shaft and the middle cross beam of the steel frame are fixedly connected by welding, and the rotating shaft and the rotating disk can rotate relative to each other.

[0015] Furthermore, there are two fixed splints, and two screw rods are arranged at both ends of each fixed splint. The screw rods are slidably arranged in the slide groove of the slide groove limiting plate, and the screw rods are also provided with nuts for positioning the fixed splints.

[0016] In a third aspect, the present invention further provides a construction method for a prefabricated staircase in a free-stripping mode, comprising the following steps:

[0017] S1. Use high ductility concrete to prefabricate the staircase protective layer assembly in advance, keep the inner rough surface, and embed the buckles;

[0018] S2. After the steel cage is tied, it is fixed on the production device, and the staircase protective layer is attached to the steel bar;

[0019] S3. After assembling the staircase protective layer and the steel cage, a piece of the staircase platform side piece is reserved and not installed as a concrete pouring inlet, the first staircase fixture and the second staircase fixture are rotated 90°, and concrete is poured inward through the pouring inlet;

[0020] S4. After the concrete pouring is completed, the side assembly of the stair platform as the pouring inlet is clamped on the steel cage, the first staircase fixture and the second staircase fixture are evenly rotated, and the concrete inside the staircase is evenly vibrated as a whole;

[0021] S5. After vibration, rotate the stairs so that the tread surface faces upward for maintenance, so that it is convenient for lifting after maintenance is completed.

[0022] Compared with the prior art, the present invention has the following advantages and positive effects:

[0023] The present invention eliminates the need for stair demoulding by pouring concrete inside the stair protective layer assembly and solidifying the concrete together with the steel cage and the protective layer assembly, thereby improving production efficiency. The buckles are connected with the steel cage by clips, thereby solving the problem of displacement of the stress-bearing steel bars at the bottom of the prefabricated staircase during vibration, and the problem of uneven stress on the prefabricated staircase and local damage by eliminating the need for demoulding. Meanwhile, it is difficult to accurately control the thickness and quality of the protective layer during the manufacturing process of traditional prefabricated stairs. The stair protective layer assembly is prefabricated and buckles are provided to connect the buckles with the steel cage, so that the thickness of the protective layer is uniform and the size is accurate, and it will not be too large or too small.

[0024] The present invention provides a rotatable staircase fixer so that the staircase can be vibrated uniformly as a whole after pouring concrete, thereby ensuring the density of the concrete, improving the overall strength and stability of the staircase, and reducing the occurrence of internal defects of the concrete; by rotating the staircase to a suitable angle for hoisting, the subsequent adjustment process is reduced, making the installation of the staircase more convenient, and reducing the construction difficulty and safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 This is an exploded view of the prefabricated staircase structure in the free-release mode of the present invention;

[0027] Figure 2 This is a diagram of the clamping structure between the steel cage and the staircase protective layer assembly of the present invention;

[0028] Figure 3 This is an assembly structure diagram of the free-stripping prefabricated stairs and the manufacturing device of the present invention.

[0029] In the figure: 1. steel cage; 2. staircase protective layer assembly; 3. buckle; 4. staircase platform end assembly; 5. staircase platform side assembly; 6. staircase inclined section side assembly; 7. staircase platform bottom assembly; 8. staircase platform top assembly; 9. staircase inclined section bottom assembly; 10. prefabricated stair treads; 11. steel frame column; 12. steel frame top beam; 13. steel frame middle beam; 14. rotating disk; 15. rotating shaft; 16. slide groove limit plate; 17. fixed splint; 18. nut; 19. belt; 20. transmission shaft; 21. drive wheel; 22. motor. DETAILED DESCRIPTION

[0030] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0032] In order to solve the above technical problems, the present invention provides a prefabricated staircase in a free-detachment mode, comprising: a steel cage 1 and a staircase protective layer assembly 2; the inner side of the staircase protective layer assembly 2 is a rough surface; the staircase protective layer assembly 2 is arranged on the outer side of the steel cage 1, and a buckle 3 is arranged on the side of the staircase protective layer assembly 2 close to the steel cage 1, which is used to clamp the staircase protective layer assembly 2 on the steel cage 1, and concrete is poured inside the staircase protective layer assembly 2, and is solidified as a whole with the steel cage 1 and the staircase protective layer assembly 2. The staircase demoulding process is eliminated, and the production efficiency is improved; at the same time, it is difficult to accurately control the thickness and quality of the protective layer during the production process of traditional prefabricated stairs. By prefabricating the staircase protective layer assembly 2 and setting the buckle 3 to clamp with the steel cage 1, the thickness of the protective layer is uniform and the size is accurate, and it will not be too large or too small.

[0033] The staircase protective layer assembly 2 is composed of a staircase platform side assembly 5, a staircase platform end assembly 4, a staircase platform bottom assembly 7, a staircase platform top assembly 8, a staircase inclined section bottom assembly 9, a staircase inclined section side assembly 6 and a prefabricated stair tread 10. The prefabricated stair tread 10 is arranged above the inclined section of the steel cage 1, the staircase inclined section bottom assembly 9 is arranged below the inclined section of the steel cage 1, the staircase inclined section side assembly 6 is arranged on the side of the inclined section of the steel cage 1, the staircase platform side assembly 5 is arranged on the side of the horizontal section of the steel cage 1, the staircase platform side assembly 5 is arranged above the horizontal section of the steel cage 1, the staircase platform end assembly 4 is arranged at the end of the horizontal section of the steel cage 1, the staircase platform bottom assembly 7 is arranged below the horizontal section of the steel cage 1, and the staircase platform side assembly 5 is arranged on the side of the horizontal section of the steel cage 1.

[0034] There are multiple clips 3 arranged on the side of the stair platform 5, the end assembly of the stair platform 4, the bottom assembly of the stair platform 7, the top assembly of the stair platform 8, the bottom assembly of the stair inclined section 9, the side assembly of the stair inclined section 6 and the prefabricated stair treads 10 close to the steel cage 1, and they are evenly distributed.

[0035] The buckle 3 is composed of two arc-shaped cards, one end of the two arc-shaped cards is hinged and fixedly connected to the inside of the stair protective layer assembly 2 through a hinge seat, and the other end of the two arc-shaped cards is provided with a wedge-shaped lock buckle for locking the steel bar in the circular ring formed by the two arc-shaped cards.

[0036] The present invention also provides a manufacturing device for a prefabricated staircase in a free-slip mode, comprising: a first staircase fixer and a second staircase fixer, wherein the first staircase fixer and the second staircase fixer have the same structure; the first staircase fixer is composed of two steel frame columns 11, a steel frame top crossbeam 12 and a steel frame middle crossbeam 13, wherein the two ends of the steel frame top crossbeam 12 are fixedly connected to the tops of the two steel frame columns 11, and the two ends of the steel frame middle crossbeam 13 are fixedly connected to the middles of the two steel frame columns 11; a rotating disk 14 is rotatably provided on the steel frame middle crossbeam 13, two slide groove limit plates 16 are provided on the rotating disk 14, and two fixed splints 17 are provided between the two slide groove limit plates 16, and the two ends of the fixed splint 17 are slidably provided in the slide grooves of the slide groove limit plates 16 for placing the steel cage 1 and the staircase protective layer assembly 2 of the prefabricated staircase; a driving wheel 21 is also provided on the steel frame column 11, and the driving wheel 21 is used to drive the rotating disk 14 to rotate.

[0037] The driving wheel 21 and the rotating disk 14 are driven by a belt 19 or a chain.

[0038] The driving wheel 21 on the first staircase fixture rotates synchronously with the driving wheel 21 on the second staircase fixture via a transmission shaft 20. A driving motor 22 is provided on one side of the driving wheel 21 on the first staircase fixture to provide power for the entire device.

[0039] The middle cross beam 13 of the steel frame is connected to the rotating disk 14 via a rotating shaft 15 . The rotating shaft 15 and the middle cross beam 13 of the steel frame are fixedly connected by welding. The rotating shaft 15 and the rotating disk 14 can rotate relative to each other.

[0040] There are two fixed splints 17 , and two screw rods are arranged at both ends of each fixed splint 17 . The screw rods are slidably arranged in the slide groove of the slide groove limiting plate 16 . The screw rods are also provided with nuts 18 for positioning the fixed splints 17 .

[0041] The present invention also provides a construction method of a prefabricated staircase in a free-stripping mode, comprising the following steps:

[0042] S1. Use high ductility concrete to prefabricate the staircase protective layer group 2 in advance, retain the inner rough surface, ensure the adhesion of the internal concrete when pouring, increase the adhesion with the post-poured concrete, and embed the buckle 3;

[0043] S2. The steel cage 1 is tied and fixed to the production device, and the staircase protective layer assembly 2 is stuck to the steel bar;

[0044] S3. After assembling the staircase protective layer assembly 2 and the steel cage 1, a piece of the staircase platform side assembly 5 is reserved and not installed, as a concrete pouring inlet, the first staircase fixture and the second staircase fixture are rotated 90°, and concrete is poured inward through the pouring inlet;

[0045] S4. After the concrete pouring is completed, the side assembly 5 of the staircase platform serving as the pouring inlet is installed, the first staircase fixture and the second staircase fixture are rotated evenly, and the concrete inside the staircase is vibrated evenly as a whole; during the concrete pouring process of the conventional prefabricated staircase, the vibration method is limited, and uneven vibration is prone to occur. The present invention utilizes the rotatable staircase fixture on the manufacturing device, rotates the staircase at a constant speed, and utilizes gravity to evenly vibrate the poured concrete, thereby solving the problem of uneven vibration;

[0046] S5. After the vibration is completed, the stairs are rotated to face the step surface upward for maintenance, which is convenient for hoisting after the maintenance is completed. The rotatable staircase fixture on the manufacturing device can be used to rotate the stairs at a uniform speed, and gravity can be used to evenly vibrate the poured concrete. The stairs can also be rotated to a suitable angle for hoisting.

[0047] In the construction method of the present invention, the process of removing the formwork of the stairs is eliminated, thereby improving production efficiency. By prefabricating the protective layer, the protective layer will not be too large or too small. Using high-ductility concrete as the protective layer can improve the ductility of the stair surface, so that cracks will not appear on the surface, thereby avoiding affecting its durability and bearing capacity.

[0048] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A prefabricated staircase with a no-stripping mode, characterized in that: include: A steel cage and a staircase protective layer assembly; the inner side of the staircase protective layer assembly is a rough surface; the staircase protective layer assembly is arranged on the outer side of the steel cage, and a buckle is arranged on the side of the staircase protective layer assembly close to the steel cage for clamping the staircase protective layer assembly on the steel cage, concrete is poured inside the staircase protective layer assembly, and the steel cage and the staircase protective layer assembly are solidified as one.

2. A prefabricated staircase in a free-stripping mode as claimed in claim 1, characterized in that: The staircase protective layer assembly consists of staircase platform side assembly, staircase platform end assembly, staircase platform bottom assembly, staircase platform top assembly, staircase inclined section bottom assembly, staircase inclined section side assembly and prefabricated staircase treads. The prefabricated staircase treads are arranged above the inclined section of the steel cage, the staircase inclined section bottom assembly is arranged below the inclined section of the steel cage, the staircase inclined section side assembly is arranged on the side of the inclined section of the steel cage, the staircase platform side assembly is arranged on the side of the horizontal section of the steel cage, the staircase platform side assembly is arranged above the horizontal section of the steel cage, the staircase platform end assembly is arranged at the end of the horizontal section of the steel cage, the staircase platform bottom assembly is arranged below the horizontal section of the steel cage, and the staircase platform side assembly is arranged on the side of the horizontal section of the steel cage.

3. A prefabricated staircase in a free-stripping mode as claimed in claim 2, characterized in that: There are multiple and evenly distributed clips arranged on the side panels of the stair platform, the end panels of the stair platform, the bottom panels of the stair platform, the top panels of the stair platform, the bottom panels of the stair inclined section, the side panels of the stair inclined section and the prefabricated stair treads close to the side of the steel cage.

4. The prefabricated staircase in the free-stripping mode as claimed in claim 1, characterized in that: The buckle is composed of two arc-shaped cards, one end of the two arc-shaped cards is hinged and fixedly connected to the inside of the stair protective layer assembly through a hinge seat, and the other end of the two arc-shaped cards is provided with a wedge-shaped lock buckle for locking the steel bar in the circular ring formed by the two arc-shaped cards.

5. A manufacturing device for the free-stripping prefabricated staircase according to any one of claims 1 to 4, characterized in that: include: a first staircase fixer and a second staircase fixer, wherein the first staircase fixer and the second staircase fixer have the same structure; The first staircase fixer is composed of two steel frame columns, a steel frame top beam and a steel frame middle beam, the two ends of the steel frame top beam are fixedly connected to the tops of the two steel frame columns, the two ends of the steel frame middle beam are fixedly connected to the middles of the two steel frame columns, a rotating disk is rotatably provided on the steel frame middle beam, two slide groove limit plates are provided on the rotating disk, two fixed splints are provided between the two slide groove limit plates, the two ends of the fixed splints are slidably provided in the slide grooves of the slide groove limit plates, for placing the steel cage and stair protective layer assembly of the prefabricated stairs; a driving wheel is also provided on the steel frame column, and the driving wheel is used to drive the rotating disk to rotate.

6. The manufacturing device according to claim 5, characterized in that: The transmission mode between the driving wheel and the rotating disk is belt drive or chain drive.

7. The manufacturing device according to claim 5, characterized in that: The driving wheel on the first staircase fixture rotates synchronously with the driving wheel on the second staircase fixture via a transmission shaft. A driving motor is provided on one side of the driving wheel on the first staircase fixture to provide power for the entire device.

8. The manufacturing device according to claim 5, characterized in that: The middle cross beam of the steel frame is connected to the rotating disk via a rotating shaft. The rotating shaft and the middle cross beam of the steel frame are fixedly connected by welding. The rotating shaft and the rotating disk can rotate relative to each other.

9. The manufacturing device according to claim 5, characterized in that: There are two fixed splints, and two screw rods are arranged at both ends of each fixed splint. The screw rods are slidably arranged in the slide groove of the slide groove limiting plate. The screw rods are also provided with nuts for positioning the fixed splints.

10. A construction method of a prefabricated staircase in a free-stripping mode as claimed in any one of claims 5 to 9, characterized in that: The following steps are involved: S1. Use high ductility concrete to prefabricate the staircase protective layer assembly in advance, keep the inner rough surface, and embed the buckles; S2. After the steel cage is tied, it is fixed on the production device, and the staircase protective layer is attached to the steel bar; S3. After assembling the staircase protective layer and the steel cage, a piece of the staircase platform side piece is reserved and not installed as a concrete pouring inlet, the first staircase fixture and the second staircase fixture are rotated 90°, and concrete is poured inward through the pouring inlet; S4. After the concrete pouring is completed, the side assembly of the stair platform as the pouring inlet is clamped on the steel cage, the first staircase fixture and the second staircase fixture are evenly rotated, and the concrete inside the staircase is evenly vibrated as a whole; S5. After vibration, rotate the stairs so that the tread surface faces upward for maintenance, so that it is convenient for lifting after maintenance is completed.

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