Combined light-weight prefabricated concrete stair production mold and prefabricated stair thereof

Abstract

The utility model discloses a combined lightweight precast concrete stair production mould and a precast stair thereof, comprising a stackable base, an adjustable support, an integrated beam mould, a movable end mould and a special stackable step plate production mould, the special stackable step plate production mould is used for producing a precast step plate and a precast platform plate; the adjustable support is installed in the stackable base, the integrated beam mold is installed at the top of the adjustable support, and the movable end mold is installed at one end of the stackable base. And the prefabricated step plates and the prefabricated platform plates are processed and assembled to form the prefabricated stair through the stackable base, the adjustable bracket, the integrated beam mold and the movable end mold. Compared with a conventional stair, the stair has the advantages that the self weight of the prefabricated stair can be greatly reduced, the production efficiency is improved, the practicability, durability, decoration, integration and use convenience of the prefabricated stair are improved, the installation and construction difficulty is reduced, the cost and carbon emission are reduced, and huge economic and social benefits can be created.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of building, especially relates to a combined light weight prefabricated concrete stair production mould and prefabricated stair thereof. BACKGROUND

[0002] With the transformation and upgrading of the building industry in China, prefabricated assembly type concrete buildings are paid more and more attention by the country, and the market share increases year by year. In prefabricated assembly type concrete buildings, prefabricated stairs are widely used because they have the advantages of easy installation, environmental protection in construction, reliable quality and the like compared with cast-in-place stairs. However, the prefabricated concrete stairs on the market basically adopt the design idea of traditional cast-in-place buildings, and the shape size, concrete strength and steel bar configuration are all based on the technical standards under the cast-in-place mode, which leads to a series of difficulties in the prefabricated concrete stairs in the assembly type concrete building project.

[0003] The weight is too large, which leads to the need for a tower crane much larger than cast-in-place construction during on-site hoisting, and greatly increases the construction difficulty and construction cost.

[0004] The production efficiency is low, and the weight is too large, and the model is relatively complex, which leads to low production efficiency.

[0005] The concrete strength is too low, which leads to an increase in the cross section of many stairs, further increases the weight, and increases the wear-resistant layer on the surface to meet the anti-skid and decorative functions.

[0006] The steel bar configuration is unreasonable, the total amount is large, the concrete and the mould are wasted seriously, and the cost is high.

[0007] The integration is low, and the related requirements for emergency use are not considered.

[0008] Therefore, the application of a combined light weight prefabricated concrete stair production mould and prefabricated stair thereof is invented, a series of technical innovation means and measures are adopted, the self weight of the stair is greatly reduced on the basis of meeting the basic functions of the stair, the production efficiency is improved, the practicability, durability, decorative property, integration and use convenience of the prefabricated stair are improved, the installation and construction difficulty is reduced, the cost and carbon emission are reduced, and the economic and social benefits of the industry are improved. SUMMARY

[0009] The utility model discloses a combined light weight prefabricated concrete stair production mould and prefabricated stair thereof, and aims at solving the problems in the background art. To achieve the purpose, the utility model adopts the technical scheme that

[0010] The utility model provides a kind of combined lightweight prefabricated concrete stair production mould, including stackable base, adjustable support, integrated beam mould, movable end mould and stackable tread board special production mould, stackable tread board special production mould is used to produce prefabricated tread board and prefabricated platform board, the inside of stackable base is equipped with adjustable support, the top of adjustable support is equipped with integrated beam mould, one end of stackable base is equipped with movable end mould, prefabricated tread board and prefabricated platform board are after processing and assembling stackable base, adjustable support, integrated beam mould and movable end mould constitute prefabricated stair.

[0011] Preferably, the stackable base includes a base frame, gear slide rails, jacks, a movable end mold, positioning piles, lock heads, and lifting holes. The inside left and right of the base frame is equipped with gear slide rails. The inside front and back of the base frame is equipped with jacks. The positioning piles are installed on the left and right columns of the base frame through the lock heads. The columns at the corners of the base frame are provided with lifting holes.

[0012] Preferably, the adjustable support includes an adjustable support and an adjusting gear. The adjustable support is installed on the gear slide rails through the adjusting gear. The adjusting gear is engaged with the gear of the gear slide rails. The adjustable support is in the shape of a Chinese character.

[0013] Preferably, the integrated beam mold includes side beam molds, a steel frame, lifting rings, positioning holes, and locks. The bottom of the steel frame is equipped with side beam molds. The top of the steel frame is equipped with multiple lifting rings. The columns of the steel frame are provided with positioning holes. The locks are installed on the positioning holes.

[0014] Preferably, the stackable tread board special production mold includes a universal base and a core mold. The universal base is detachably connected with the core mold. The columns of the universal base can be stacked up and down. The upper ends of the columns of the universal base are provided with lifting holes. The universal base is also provided with positioning columns and pin holes.

[0015] A combined lightweight prefabricated concrete stair includes prefabricated tread boards, prefabricated platform boards, post-cast side beams, intelligent emergency light strips, and sealing strips. The end of the post-cast side beam is equipped with a prefabricated platform board. The top of the post-cast side beam is equipped with a prefabricated tread board. The intelligent emergency light strips are placed at the front transverse gaps between the prefabricated tread boards. The sealing strips are placed at the back transverse gaps between the prefabricated tread boards.

[0016] Preferably, the surface of the prefabricated tread board is provided with prefabricated anti-slip strips and decorative surfaces. The bottom of the prefabricated tread board is provided with steel bars.

[0017] Preferably, the prefabricated tread board is prefabricated in advance. The whole is designed to be light and thin, with a thickness of 30-50 mm. The length, width, and internal reinforcement are determined according to engineering design. The exposed connecting steel bars at the back of both ends of the board generally have a length of 100 mm. The surface of the board is provided with prefabricated anti-slip strips and decorative surfaces. According to needs, rail holes or embedded connecting pieces can also be reserved.

[0018] Preferably, the prefabricated platform plate is arranged at the upper and lower ends of the stairs, and the whole is designed to be light and thin, with a thickness of 30-50 mm, the length, width and internal reinforcement being determined according to the engineering design, the back surface of the two ends of the plate being exposed and connected with the exposed steel bars, the exposed length being generally 100 mm, the surface of the prefabricated platform plate arranged above being provided with prefabricated anti-skid strips and decorative surfaces, and the prefabricated platform plate can also be provided with reserved railing holes or pre-buried connecting parts and pre-buried parts connected with the main structure, and the prefabricated platform plate can also be completely cancelled or reserved.

[0019] Preferably, the post-cast side beam is formed by twice pouring of concrete, and is arranged at the back surface of the two sides of the prefabricated step plate and the back surface of the upper and lower platform plates, with a thickness of 120-150 mm, the length, width and internal reinforcement being determined according to the engineering design, and the end part can be provided with a reserved pin hole for connection with the main structure, and the top surface can be provided with a lifting lug, and the wall side can be provided with a pre-buried part connected with the side wall or other structure, and the other side can be provided with a fire separation plate and a support.

[0020] Preferably, the intelligent emergency light strip is arranged at the front transverse gap between the prefabricated step plates, and can be of a sound control type or a vibration sensing type.

[0021] Preferably, the prefabricated step plate, the prefabricated platform plate and the post-cast side beam all adopt high-performance concrete, the prefabricated concrete has a compressive strength of not less than 80 MPa, the maximum coarse aggregate particle size in the concrete is not greater than 20 mm, the water-reducing rate of the high-efficiency water-reducing agent used in the concrete is not less than 30%, the wear resistance reaches the B-grade stone standard, and the anti-cracking fiber can be added according to the need, and the fiber can be an organic fiber or a metal fiber.

[0022] Preferably, the prefabricated step plate, the prefabricated platform plate and the post-cast side beam all adopt high-strength steel bars as the main tensile material, the longitudinal steel bars in the side beam are the main force steel bars, the design value of the tensile strength of the steel bars is not less than 1000 MPa, the tensile strength of the steel bars in the other parts is not less than 500 MPa, the main steel bars in the side beam can also be steel strands, and prestress can be applied according to the span and stress condition of the stairs.

[0023] A combined light-weight prefabricated concrete stair manufacturing method comprises the following steps:

[0024] S1: prefabricated step plates and prefabricated platform plates are first produced by using a special production mold for stackable step plates, the detachable core mold is fixed on the general mold by inserting the pin into the pin hole, the steel cage is placed, the concrete is poured and vibrated to be compacted, then the lifting lug is passed through the lifting hole to slowly lift, the four legs of the base are stacked up and down, and the mold is removed after curing to the required strength;

[0025] S2: Fix the adjustable "individual" bracket for supporting the prefabricated step plate and prefabricated platform plate on the stackable base slide rail, two in parallel, rotate the adjustable gear, and fix after corresponding with the stair steps one by one;

[0026] S3: The prefabricated step plate and prefabricated platform plate are reversely placed on the corresponding adjustable "individual" bracket according to the design requirements, and the whole stair steps are combined;

[0027] S4: The reserved slot embedded part, wire and vibration switch of the intelligent emergency light strip are installed at the gap between the prefabricated step plates and the front gap between the prefabricated platform plate and the prefabricated step plate, and the sealing strip is installed at the back gap;

[0028] S5: The integrated beam mold for producing the post-cast side beam is installed, the positioning hole is inserted into the base positioning pile after adjusting the alignment, and then the lock head and the lock body are closed and locked, so that the exposed connecting steel bars of the prefabricated step plate and the prefabricated platform plate extend into the post-cast side beam;

[0029] S6: The steel reinforcement cage and the embedded part are placed in the mold, and the reserved installation opening is arranged;

[0030] S7: The jack is controlled to slowly extend, and the movable end mold is closed;

[0031] S8: The concrete is poured in the mold cavity, vibrated and compacted, and the surface is finished, and the post-cast side beam is formed, and the post-cast side beam is combined with the step plate and the platform plate to form the whole stair;

[0032] S9: The post-cast side beam concrete is cured according to the specification requirements;

[0033] S10: After the concrete strength is cured to the design requirement strength, the lock is opened, and the jack is controlled to slowly open the movable end mold;

[0034] S11: The integrated beam mold is slowly lifted by using the hook penetrating the lifting ring;

[0035] S12: The stair is lifted to separate from the stackable base, and the production of the combined lightweight prefabricated stair is completed.

[0036] The beneficial effects of the utility model are as follows:

[0037] Light weight, the prefabricated step plate and the prefabricated platform plate are designed as light and thin as a whole, which can greatly reduce the self weight of the prefabricated component, and is convenient for hoisting and transportation.

[0038] High production efficiency, since the production mode of combination and secondary pouring is adopted, the trapezoidal stair with complex structure becomes a simple plate type production mode (single step plate and platform plate), and can be produced in a stacked manner, which greatly improves the production efficiency.

[0039] The installation efficiency is high, the transportation and hoisting of components are more convenient and fast due to the reduction of the weight of the components, and the work efficiency is effectively provided.

[0040] The strength is high, high-performance concrete is prefabricated, and the crack-resistant fiber can be additionally increased and the prestress technology is used, so that the durability and wear resistance of the prefabricated stair are improved, and the quality is safe and reliable.

[0041] The cost is low, the light and thin design can save materials, and relatively light hoisting equipment is selected, so that the mechanical cost is saved.

[0042] The integration degree is high, the stair includes decoration and intelligent emergency use function, and the function is more perfect. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 It is a whole schematic view of the prefabricated concrete stair of the utility model;

[0044] Figure 2 It is a back schematic view of the prefabricated concrete stair of the utility model;

[0045] Figure 3 It is a side sectional view of the prefabricated concrete stair of the utility model;

[0046] Figure 4 It is a local enlarged view of the prefabricated concrete stair of the utility model;

[0047] Figure 5 It is a schematic view of the prefabricated step plate of the utility model;

[0048] Figure 6 It is an explosion schematic view of the stair production mold of the utility model;

[0049] Figure 7 It is a combination schematic view of the stair production mold of the utility model;

[0050] Figure 8 It is a schematic view of the stackable base in the utility model;

[0051] Figure 9 It is a side view of the stackable base in the utility model;

[0052] Figure 10 It is a sectional view of the slide rail in the utility model;

[0053] Figure 11 It is a schematic view of the adjustable 'individual' support in the utility model;

[0054] Figure 12 It is a schematic view of the integrated beam mold in the utility model;

[0055] Figure 13 It is an explosion schematic view of the production mold of the prefabricated step plate in the utility model;

[0056] Figure 14 Fig. 1 is a schematic diagram of the production mold combination of the prefabricated step board in the utility model;

[0057] In the drawings, the reference signs are as follows:

[0058] 1. stackable base; 101, base frame; 102, gear slide rail; 103, jack; 104, movable end mold; 105, positioning pile; 106, lock head; 107, lifting hole; 2, adjustable support; 21, adjustable support; 22, adjusting gear; 3, integrated beam mold; 31, side beam mold; 32, steel frame; 33, lifting ring; 34, positioning hole; 35, lock; 4, movable end mold; 5, special production mold for stackable step board; 51, universal base; 52, core mold; 53, lifting hole; 54, positioning column; 55, pin hole; 6, prefabricated staircase; 61, prefabricated step board; 611, prefabricated anti-skid strip; 612, decorative surface; 613, steel bar; 62, prefabricated platform plate; 63, post-cast side beam; 64, intelligent emergency light strip; 65, sealing strip. DETAILED DESCRIPTION

[0059] In order to facilitate the understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. The preferred embodiments of the utility model are shown in the drawings. However, the utility model can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0060] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. Conversely, when an element is referred to as being "directly on" another element, there is no intervening element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment. The terms "upper end", "lower end", "left side", "right side", "front end", "rear end" and similar expressions used herein are with reference to the positional relationship of the drawings.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing the specific embodiments and are not intended to limit the utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0062] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0063] like Figures 1-14 As shown, this utility model provides a modular lightweight precast concrete staircase production mold, including a stackable base 1, an adjustable support 2, an integrated beam mold 3, a movable end mold 4, and a stackable tread production mold 5. The stackable tread production mold 5 is used to produce precast treads 61 and precast platform slabs 62. The adjustable support 2 is installed inside the stackable base 1, the integrated beam mold 3 is installed on the top of the adjustable support 2, and the movable end mold 4 is installed at one end of the stackable base 1. The precast treads 61 and precast platform slabs 62 are assembled from the stackable base 1, the adjustable support 2, the integrated beam mold 3, and the movable end mold 4 to form a precast staircase 6.

[0064] In this embodiment, the stackable base 1 includes a base frame 101, a gear slide rail 102, a jack 103, a movable end mold 4, a positioning post 105, a locking head 106, and a lifting hole 107. The gear slide rail 102 is installed inside the left and right sides of the base frame 101, and the jack 103 is installed inside the front and rear sides of the base frame 101. The positioning post 105 is installed on the left and right columns of the base frame 101 through the locking head 106, and the column at the corner of the base frame 101 is provided with a lifting hole 107.

[0065] In this embodiment, the adjustable bracket 2 includes an adjustable bracket 21 and an adjustable gear 22. The adjustable bracket 21 is mounted on the gear slide rail 102 via the adjustable gear 22. The adjustable gear 22 meshes with the gear of the gear slide rail 102. The adjustable bracket 21 is U-shaped.

[0066] In this embodiment, the integrated beam mold 3 includes a side beam mold, a steel frame 32, lifting rings 33, positioning holes 34, and locking buckles 35. The side beam mold is installed at the bottom of the steel frame 32, and multiple lifting rings 33 are installed at the top of the steel frame 32. The support columns of the steel frame 32 are provided with positioning holes 34, and locking buckles 35 are installed on the positioning holes 34.

[0067] In this embodiment, the special production mold 5 for stackable step boards includes a general base 51 and a core mold 52. The general base 51 and the core mold 52 are detachably connected. The columns of the general base 51 can be stacked up and down. The upper end of the columns of the general base 51 has a lifting hole 53. The general base 51 also has a positioning post 54 and a pin hole 55.

[0068] The combined lightweight prefabricated concrete stair includes prefabricated step plates 61, prefabricated platform plates 62, post-cast side beams 63, intelligent emergency light strips 64 and sealing strips 65. The prefabricated platform plates 62 are installed at the ends of the post-cast side beams 63, and the prefabricated step plates 61 are installed at the top of the post-cast side beams 63. The intelligent emergency light strips 64 are arranged at the front transverse gaps between the prefabricated step plates 61, and the sealing strips 65 are arranged at the back transverse gaps between the prefabricated step plates 61.

[0069] In the embodiment, the surface of the prefabricated step plate 61 is provided with a prefabricated anti-skid strip 611 and a decorative surface 612, and the bottom of the prefabricated step plate 61 is provided with a reinforcing steel bar 613.

[0070] In the embodiment, the prefabricated step plate 61 is prefabricated in advance and has a light and thin design as a whole, with a thickness of 30-50 mm, a length, a width and internal reinforcement determined according to engineering design. The connecting reinforcing steel bars 613 are exposed on the back surface of both ends of the plate, with an exposed length of generally 100 mm. The surface of the plate is provided with a prefabricated anti-skid strip 611 and a decorative surface 612, and a handrail hole or a pre-buried connecting piece can also be reserved as needed.

[0071] In the embodiment, the prefabricated platform plate 62 is arranged at the upper and lower ends of the stair and has a light and thin design as a whole, with a thickness of 30-50 mm, a length, a width and internal reinforcement determined according to engineering design. The connecting reinforcing steel bars 613 are exposed on the back surface of both ends of the plate, with an exposed length of generally 100 mm. The surface of the prefabricated platform plate 62 arranged at the upper end is provided with a prefabricated anti-skid strip 611 and a decorative surface 612, and a handrail hole or a pre-buried connecting piece and a pre-buried piece or a reserved hole for connecting with the main structure can also be reserved, and the prefabricated platform plate 62 can also be completely cancelled or reserved only one according to design needs.

[0072] In the embodiment, the post-cast side beam 63 is formed by secondary pouring of concrete and arranged on the back surface of both sides of the prefabricated step plate 61 and the back surface of the upper and lower end platform plates, with a thickness of 120-150 mm, a length, a width and internal reinforcement determined according to engineering design. According to design needs, the end portion can be provided with a reserved pin hole 55 for connecting with the main structure, the top surface can be provided with a lifting lug, and the wall-adjacent side can be provided with a pre-buried piece for connecting with the side wall or other structure, and the other side can be provided with a fire separation plate and a support.

[0073] In the embodiment, the intelligent emergency light strip 64 is arranged at the front transverse gap between the prefabricated step plates 61 and can be of a sound control type or a vibration sensing type.

[0074] In the embodiment, the prefabricated step plate 61, the prefabricated platform plate 62 and the post-cast side beam 63 are all made of high-performance concrete, the compressive strength of the prefabricated concrete is not less than 80 MPa, the maximum size of the coarse aggregate in the concrete is not greater than 20 mm, the water-reducing rate of the high-efficiency water-reducing agent used in the concrete is not less than 30%, the wear resistance reaches the B-grade stone standard, and the anti-cracking fiber can be added according to the requirement, and the fiber can be an organic fiber or a metal fiber.

[0075] In the embodiment, the prefabricated step plate 61, the prefabricated platform plate 62 and the post-cast side beam 63 are all made of high-strength steel bars 613 as the main tensile material, the longitudinal steel bars 613 in the side beam are the main force steel bars 613, the design value of the tensile strength of the steel bars is not less than 1000 MPa, the tensile strength of the steel bars in the remaining parts is not less than 500 MPa, the main bars in the side beam can also be steel strands, and the pre-tensioned prestress can also be applied according to the span and stress condition of the stair.

[0076] A combined lightweight prefabricated concrete stair manufacturing method comprises the following steps:

[0077] S1: first, the prefabricated step plate 61 and the prefabricated platform plate 62 are produced by using the special production mold 5 for stackable step plates, which are used to form the steps of the subsequent combined lightweight stair, the detachable core mold 52 is fixed on the general mold by inserting the pin into the pin hole 55, the steel bar cage 613 is placed, the concrete is poured and vibrated, the bottom seat four legs are slowly lifted by using the lifting hook to pass through the lifting hole 53 to make the bottom seat four legs stack up and down, and the mold is removed after curing to the required strength;

[0078] S2: the adjustable 'individual' support is fixed on the slide rail of the stackable bottom seat 1, two groups are placed side by side, the adjustable gear 22 is rotated, and the stair steps are fixed one by one;

[0079] S3: the prefabricated step plate 61 and the prefabricated platform plate 62 are placed on the corresponding adjustable 'individual' support in the reverse direction according to the design requirement, and the whole stair steps are combined;

[0080] S4: the reserved slot embedded part, the wire and the vibration switch of the intelligent emergency light strip 64 are installed at the gap between the prefabricated step plates 61 and the front gap between the prefabricated platform plate 62 and the prefabricated step plate 61, and the sealing strip 65 is installed at the back gap;

[0081] S5: the integrated beam mold 3 for producing the post-cast side beam 63 is installed, the positioning hole 34 is inserted into the bottom seat positioning pile 105 after the adjustment and alignment, and then the lock head 106 and the lock 35 body are closed and locked, so that the exposed connecting steel bars 613 of the prefabricated step plate 61 and the prefabricated platform plate 62 extend into the post-cast side beam 63;

[0082] S6: Put the steel bar 613 skeleton and the embedded part into the mold, and reserve the installation hole;

[0083] S7: Control the jack 103 to slowly extend, so that the movable end mold 4 is closed;

[0084] S8: Pour the concrete in the mold cavity, vibrate and compact, and then perform the finishing, so that the post-cast side beam 63 is formed, and the post-cast side beam 63 is combined with the step plate and the platform plate to form an integral stair;

[0085] S9: Perform the post-cast side beam 63 concrete curing according to the specification requirements;

[0086] S10: After the concrete strength curing reaches the design requirement strength, open the lock buckle 35, and control the jack 103 to slowly open the movable end mold 4;

[0087] S11: Slowly hoist the integrated beam mold 3 by using the hook to pass through the lifting ring 33;

[0088] S12: Hoist the stair to make it separate from the stackable base 1, so that the production of the combined lightweight prefabricated stair 6 is completed.

[0089] The above embodiments are only used for describing the present application, and are not used for limiting the present application. The ordinary skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, all equivalent technical solutions also belong to the scope of the present application, and the patent protection scope of the present application should be defined by the claims.

Claims

1. A modular lightweight precast concrete staircase production mold, characterized in that, The system includes a stackable base, an adjustable support, an integrated beam mold, a movable end mold, and a special production mold for stackable stair treads. The special production mold for stackable stair treads is used to produce prefabricated stair treads and prefabricated platform slabs. The adjustable support is installed inside the stackable base, the integrated beam mold is installed on the top of the adjustable support, and the movable end mold is installed at one end of the stackable base. The prefabricated stair treads and prefabricated platform slabs are assembled from the stackable base, adjustable support, integrated beam mold, and movable end mold to form a prefabricated staircase.

2. The modular lightweight precast concrete staircase production mold according to claim 1, characterized in that, The stackable base includes a base frame, gear slide rails, jacks, movable end molds, positioning stakes, locking heads, and lifting holes. The gear slide rails are installed inside the left and right sides of the base frame, and the jacks are installed inside the front and rear sides of the base frame. The positioning stakes are installed on the left and right columns of the base frame through the locking heads, and the lifting holes are provided on the columns at the corners of the base frame.

3. The modular lightweight precast concrete staircase production mold according to claim 1, characterized in that, The adjustable bracket includes an adjusting bracket and an adjusting gear. The adjusting bracket is mounted on a gear slide rail via the adjusting gear. The adjusting gear meshes with the gear of the gear slide rail. The adjusting bracket is U-shaped.

4. The modular lightweight precast concrete staircase production mold according to claim 1, characterized in that, The integrated beam mold includes a side beam mold, a steel frame, lifting rings, positioning holes, and locks. The side beam mold is installed at the bottom of the steel frame, and the multiple lifting rings are installed at the top of the steel frame. The support columns of the steel frame are provided with positioning holes, and the locks are installed on the positioning holes.

5. A modular lightweight precast concrete staircase production mold according to claim 1, characterized in that, The special production mold for stackable step treads includes a universal base and a core mold. The universal base and the core mold are detachably connected. The columns of the universal base can be stacked vertically. The upper end of the columns of the universal base has a lifting hole. The universal base also has a positioning column and a pin hole.

6. A precast staircase produced by a combined lightweight precast concrete staircase production mold as described in any one of claims 1-5, characterized in that, The device includes precast step treads, precast platform slabs, post-cast side beams, intelligent emergency light strips, and sealing strips. The precast platform slabs are installed at the ends of the post-cast side beams, and the precast step treads are installed at the top of the post-cast side beams. The intelligent emergency light strips are placed in the front transverse gaps between the precast step treads, and the sealing strips are placed in the back transverse gaps between the precast step treads.

7. The prefabricated staircase according to claim 6, characterized in that, The prefabricated stair treads are provided with prefabricated anti-slip strips and decorative surfaces on their surface, and the bottom of the prefabricated stair treads is provided with reinforcing bars.

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