An installation device for precast concrete stair components

Abstract

This invention belongs to the field of prefabricated building technology and discloses an installation device for precast concrete stair components, including a base. Through the cooperation of a positioning component and a hydraulic mechanism, a rubber plate presses against two support plates, causing the lower end of the rubber plate to squeeze the hydraulic oil inside the hydraulic cylinder into the telescopic rod, forcing it to extend the guide rod. The guide rod then moves the hydraulic oil between itself and the sealing plate, causing the oil pressure to pass through a metal rod and compress the air between the sealing plate and the sealing plate. The telescopic end of the hydraulic cylinder moves slowly, preventing damage to the precast concrete stair components and the device during movement. The hydraulic mechanism drives the support component to lower the positioning component and the precast concrete stair components to a suitable installation position, reducing the time spent installing the stair with a crane and minimizing the labor required to manually move the precast concrete stair components and align them in their installation positions.

Description

Technical Field

[0001] This invention belongs to the field of prefabricated building technology, specifically an installation device for precast concrete stair components. Background Technology

[0002] Precast concrete refers to prefabricated components manufactured in a factory. These components only require on-site assembly and follow-up procedures, significantly reducing the construction cycle. This includes, but is not limited to, precast concrete walls, stairs, and floor slabs. Buildings composed of these components are generally referred to as prefabricated buildings. During stair installation, precast concrete stair components are typically hoisted to designated positions using a crane, and technicians align the stairs with the positioning holes in the floor slab. The use of steel cables by the crane increases the time spent hoisting the stairs, and manual calibration requires considerable effort. Furthermore, the crane needs to perform other hoisting tasks on-site, slowing down the overall construction progress and reducing efficiency. Therefore, we provide an installation device for precast concrete stair components. Summary of the Invention

[0003] To address the problems mentioned in the background art, the present invention provides an installation device for precast concrete stair components, which solves the problems of technicians aligning the positioning holes of the stairs with the floor slab, which increases the time spent by the crane to hoist the stairs, requires a lot of effort for manual calibration, slows down the overall construction progress, and reduces construction efficiency.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an installation device for precast concrete stair components, including a base, and further comprising;

[0005] Two support components are respectively installed at both ends of the top of the base;

[0006] Hydraulic mechanism installed on top of the base;

[0007] Each of the aforementioned support components has a positioning component on its top;

[0008] The positioning component includes a support box hinged to the top of the support component. The top of the support box is hinged to two intersecting support plates. One end of the two support plates is slidably mounted with a rubber plate. The support box contains two symmetrically arranged hydraulic cylinders 3, which are filled with hydraulic oil. The other ends of the two support plates are respectively hinged to the sides of each hydraulic cylinder 3. The support box contains two symmetrically arranged hydraulic cylinders 2. Each hydraulic cylinder 3 has two telescopic rods connected to its interior. The telescopic ends of each telescopic rod are respectively fixedly connected to a reducer.

[0009] Each of the reducers includes a sleeve disposed inside the fixed end of the hydraulic cylinder two. A guide rod connected to the telescopic end of the telescopic rod is movably disposed inside the sleeve. A sealing plate one is movably disposed inside the sleeve. A sealing plate two is movably engaged with the side of the sealing plate one near the guide rod by a metal rod. A partition plate for separating the sealing plate two and the guide rod is disposed inside the sleeve. The partition plate is provided with holes.

[0010] The sleeve has an opening at its end and is connected to the interior of the second hydraulic cylinder. The second hydraulic cylinder is filled with hydraulic oil. A cavity is formed between the guide rod and the second sealing plate and is filled with hydraulic oil.

[0011] The hydraulic mechanism controls the lifting and lowering of the support box through the support assembly.

[0012] Preferably, the positioning assembly further includes a tension spring, the lower ends of the two support plates are elastically connected by the tension spring, each pair of reducers forms a group, and each group of reducers is respectively arranged on both sides of the hydraulic cylinder two. The telescopic end of the hydraulic cylinder two is L-shaped, and a positioning plate is respectively mounted on the opposite face of the telescopic ends of the two hydraulic cylinder two.

[0013] Preferably, the hydraulic mechanism includes an oil box fixed to the top of the base, a threaded rod is mounted on the top bearing of the oil box, a pressure plate located inside the oil box is threaded around the outer circumference of the threaded rod, and an oil groove is formed inside the base, the oil groove being connected to the inside of the oil box.

[0014] Preferably, the pressure plate is adapted to the interior of the oil box, and hydraulic oil is filled between the lower part of the pressure plate and the interior of the oil box.

[0015] Preferably, each of the support components includes a hydraulic cylinder fixed to the top of the base and a telescopic plate hinged to the top of the base. The telescopic end of the telescopic plate is hinged with a pad. A limiting sleeve is fitted around the outer periphery of the hydraulic cylinder. The top of the limiting sleeve is connected to the top of the telescopic end of the hydraulic cylinder through a telescopic plate. The outer side of the limiting sleeve is movably connected to the fixed end of the telescopic plate through a spring telescopic rod. The telescopic end of the hydraulic cylinder is hinged to the support box through a limiting wheel.

[0016] Preferably, the support assembly further includes a limiting plate disposed on two opposite sides of the top of the limiting sleeve, the outer periphery of the limiting wheel is provided with a plurality of slots, and the limiting plate is arc-shaped and has protrusions on its inner side that are adapted to the slots.

[0017] Preferably, the interior of each hydraulic cylinder is connected to the interior of the oil box via an oil groove, and the interior of each hydraulic cylinder is filled with hydraulic oil.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] This invention, through the coordination of positioning components and hydraulic mechanisms, lowers the precast concrete staircase. A rubber plate presses against two support plates, causing the lower end of the rubber plate to compress the hydraulic oil inside the hydraulic cylinder three, which then enters the telescopic rod, forcing it to extend the guide rod. The guide rod then moves the hydraulic oil between itself and the sealing plate two. After the sealing plate two is tightly attached to the partition, the oil pressure, through the metal rod, causes the sealing plate one to compress the air between itself and the sealing plate two. Due to the compressibility of air, the telescopic end of the hydraulic cylinder two moves slowly, preventing damage to the precast concrete staircase and the device from continued movement during the movement of the precast concrete staircase. After the precast concrete staircase is attached to the top of the rubber plate and fixed, the crane can directly detach from the precast concrete staircase. The hydraulic mechanism drives the support components to lower the positioning components and the precast concrete staircase to a suitable installation position. This further reduces the time spent installing the staircase by crane and also reduces the labor required to manually move the precast concrete staircase and align it in its installation position.

[0020] This invention, through the cooperation of positioning and support components, rotates a threaded rod, forcing a pressure plate to descend and squeezing hydraulic oil through an oil groove into the interiors of two hydraulic cylinders. The hydraulic cylinders then raise the positioning component to fix the position of the precast concrete staircase. Reversing the threaded rod allows the hydraulic oil to quickly lower the height of the positioning component, ensuring the lower end of the precast concrete staircase is positioned and fixed on the floor slab. Further reversing the threaded rod extracts hydraulic oil from the other hydraulic cylinder, lowering the height of the other positioning component until the other end of the precast concrete staircase is flush with the installation position. This further reduces labor costs without compromising the efficiency of precast concrete staircase installation. This invention, through the coordination of supporting components and precast concrete stair components, requires manual pulling of the first telescopic plate before hoisting the precast concrete stair components, ensuring the pad is tightly against the bottom of the floor slab installation position. This ensures the precast concrete stair components are also positioned correctly after being fixed by the positioning components, reducing the time and effort required for workers to move the components. Subsequently, the two first telescopic plates are pushed towards the outside of the first hydraulic cylinder, disengaging the pad from the bottom of the floor slab. The first telescopic plate then pushes the limiting sleeve upward via the spring telescopic rod, simultaneously compressing the second telescopic plate and causing the limiting plate to rise. The protrusions on the inner wall of the limiting plate then tightly adhere to the groove on the outer circumference of the limiting wheel, preventing the support box from moving through the hinge point of the first hydraulic cylinder's telescopic end, further limiting the position of the positioning components and preventing damage due to swinging. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0022] Figure 2This is a schematic diagram of the base and its structure in this invention.

[0023] Figure 3 This is a schematic diagram showing the structural cooperation between the support component and the positioning component of the present invention;

[0024] Figure 4 This is a schematic diagram of the internal structure of the support box of the present invention.

[0025] Figure 5 This is a schematic diagram of the cooperation between the support plate and the tension spring structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the reducer structure inside the fixed end of the hydraulic cylinder of the present invention;

[0027] Figure 7 This is a schematic diagram of the internal structure of the oil box of the present invention.

[0028] Figure 8 For the present invention Figure 7 Enlarged schematic diagram at point A. In the diagram: 1. Precast concrete staircase component; 2. Base; 3. Hydraulic mechanism; 31. Oil box; 32. Threaded rod; 33. Pressure plate; 34. Oil groove; 4. Support assembly; 41. Hydraulic cylinder one; 42. Limit sleeve; 43. Spring telescopic rod; 44. Telescopic plate one; 45. Pad; 46. Telescopic plate two; 47. Limit wheel; 48. Limit plate; 5. Positioning assembly; 51. Support box; 52. Hydraulic cylinder two; 53. Positioning plate; 54. Rubber plate; 55. Support plate; 56. Hydraulic cylinder three; 57. Telescopic rod; 58. Reducer; 581. Sleeve; 582. Sealing plate one; 583. Sealing plate two; 584. Guide rod; 59. Tension spring. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] like Figures 1 to 8 As shown, the present invention provides an installation device for precast concrete stair components, including a base 2, and further comprising;

[0031] Two support components 4 are respectively installed at both ends of the top of the base 2;

[0032] Hydraulic mechanism 3 is installed on top of base 2;

[0033] Each support component 4 has a positioning component 5 installed on its top;

[0034] The positioning component 5 includes a support box 51 hinged to the top of the support component 4. The top of the support box 51 is hinged to two intersecting support plates 55. One end of the two support plates 55 is slidably mounted with a rubber plate 54. The support box 51 is symmetrically equipped with two hydraulic cylinders 56. The hydraulic cylinders 56 are filled with hydraulic oil. The other ends of the two support plates 55 are respectively hinged to the sides of each hydraulic cylinder 56. The support box 51 is equipped with two symmetrical hydraulic cylinders 52. The interior of each hydraulic cylinder 56 is connected to two telescopic rods 57. The telescopic ends of each telescopic rod 57 are respectively fixedly connected to a reducer 58.

[0035] Each reducer 58 includes a sleeve 581 disposed inside the fixed end of the second hydraulic cylinder 52. A guide rod 584 connected to the telescopic end of the telescopic rod 57 is movably disposed inside the sleeve 581. A sealing plate 582 is movably disposed inside the sleeve 581. A sealing plate 583 is movably engaged with the side of the sealing plate 582 near the guide rod 584 by a metal rod. A partition plate is disposed inside the sleeve 581 to separate the sealing plate 583 from the guide rod 584. The partition plate has holes.

[0036] The end of the sleeve 581 is provided with an opening and is connected to the interior of the second hydraulic cylinder 52. The interior of the second hydraulic cylinder 52 is filled with hydraulic oil. A cavity is formed between the guide rod 584 and the second sealing plate 583 and is filled with hydraulic oil.

[0037] The hydraulic mechanism 3 controls the lifting and lowering of the support box 51 through the support assembly 4.

[0038] Using the above method: the hydraulic mechanism 3 controls the support assembly 4 to lift the positioning assembly 5 to a suitable position, and a crane is used to hoist the precast concrete staircase 1 to the top of the support box 51. Then, it is slowly lowered so that the bottom of the precast concrete staircase 1 contacts and presses against the rubber plate 54.

[0039] Since the support box 51 is hinged to the support component 4, the rubber plate 54 will gradually fit the bottom of the concrete stair precast component 1 during the descent of the concrete stair precast component 1, so as not to cause deviation in the subsequent installation of the concrete stair precast component 1, thus ensuring the accuracy of installation.

[0040] Rubber plate 54 presses down on the upper ends of two support plates 55. Since the two support plates 55 are cross-hinged to the top of support box 51, the lower ends of the two support plates 55 will move away from each other, thereby squeezing the hydraulic oil inside hydraulic cylinder 3 56 into the telescopic rod 57 and forcing it to drive the guide rod 584 to extend. The guide rod 584 drives the hydraulic oil between it and sealing plate 2 583 to move. When sealing plate 2 583 is in close contact with the partition, the metal rod will penetrate the hole in the partition, thereby causing the oil pressure to drive sealing plate 1 582 to move through the metal rod. At the same time, the air between sealing plate 2 583 and sealing plate 1 582 is squeezed. Since air is compressible, when the concrete stair precast component 1 falls completely into the top of support box 51 and can no longer squeeze rubber plate 54 to move, the telescopic end of hydraulic cylinder 2 52 will move slowly, thereby preventing the concrete stair precast component 1 from moving during the process of squeezing rubber plate 54, thus damaging the concrete stair precast component 1 and the device.

[0041] After the precast concrete stair component 1 is attached to the top of the rubber plate 54 and fixed, the crane can directly detach from the precast concrete stair component 1. The positioning component 5 and the precast concrete stair component 1 can be lowered to the appropriate installation position by driving the support component 4 through the hydraulic mechanism 3. This further reduces the time spent installing the staircase by the crane, and also reduces the labor required to manually move the precast concrete stair component 1 and align it with its installation position.

[0042] like Figures 1-5 As shown, the positioning component 5 also includes a tension spring 59. The lower ends of the two support plates 55 are elastically connected by the tension spring 59. Each set of two reducers 58 is a group, and each set of reducers 58 is respectively set on both sides of the hydraulic cylinder 2 52. The telescopic end of the hydraulic cylinder 2 52 is L-shaped, and a positioning plate 53 is respectively mounted on the opposite face of the telescopic ends of the two hydraulic cylinders 2 52.

[0043] Using the above solution: After the concrete staircase precast component 1 is separated from the rubber plate 54, the tension spring 59 will quickly pull the lower ends of the two support plates 55 together, thereby causing the two upper ends to merge at the same time and lifting the rubber plate 54 to the initial position, so that the next work can still be carried out smoothly, while also reducing the labor and effort of manual reset.

[0044] When the precast concrete stair component 1 is fully attached to and the rubber plate 54 is pressed until it can no longer be pressed, the telescopic end of the hydraulic cylinder 2 52 clamps the two sides of the precast concrete stair component 1. At the same time, it should be noted that the positioning plate 53 will also be attached to the top of the precast concrete stair component 1 to prevent the precast concrete stair component 1 from deviating or sliding.

[0045] like Figures 1-3 , Figure 7 and Figure 8As shown, the hydraulic mechanism 3 includes an oil box 31 fixedly mounted on the top of the base 2. A threaded rod 32 is mounted on the top bearing of the oil box 31. A pressure plate 33 located inside the oil box 31 is threadedly sleeved on the outer periphery of the threaded rod 32. An oil groove 34 is opened inside the base 2 and is connected to the inside of the oil box 31.

[0046] The pressure plate 33 is adapted to the interior of the oil box 31, and hydraulic oil is filled between the bottom of the pressure plate 33 and the interior of the oil box 31.

[0047] Each support component 4 includes a hydraulic cylinder 41 fixed to the top of the base 2 and a telescopic plate 44 hinged to the top of the base 2. The telescopic end of the telescopic plate 44 is hinged with a pad 45. A limiting sleeve 42 is fitted around the outer periphery of the hydraulic cylinder 41. The top of the limiting sleeve 42 is connected to the top of the telescopic end of the hydraulic cylinder 41 through a telescopic plate 46. The outer side of the limiting sleeve 42 is movably connected to the fixed end of the telescopic plate 44 through a spring telescopic rod 43. The telescopic end of the hydraulic cylinder 41 is hinged to the support box 51 through a limiting wheel 47.

[0048] Each hydraulic cylinder 41 is connected to the inside of the oil box 31 through the oil groove 34, and the inside of the hydraulic cylinder 41 is filled with hydraulic oil.

[0049] By adopting the above solution: rotating the threaded rod 32 can force the pressure plate 33 to descend and squeeze the hydraulic oil through the oil groove 34 into the interior of the two hydraulic cylinders 41 respectively. At this time, the hydraulic cylinders 41 extend and drive the positioning component 5 to rise. Since the concrete stair precast component 1 is tilted during hoisting and installation, after one of the positioning components 5 fixes one end of the concrete stair precast component 1, the continuous rotation of the threaded rod 32 can allow the hydraulic oil to continue to enter the other hydraulic cylinder 41 and force the other positioning component 5 to rise and fix the position of the concrete stair precast component 1. At this time, the crane can detach from the concrete stair precast component 1, further shortening the crane's working time and accelerating the overall construction progress of the project.

[0050] After the two positioning components 5 are completely fixed in position of the precast concrete staircase 1, the threaded rod 32 is rotated in the opposite direction. The hydraulic oil can be quickly disengaged from the hydraulic cylinder 41 and the height of the lower positioning component 5 is reduced, so that one end of the precast concrete staircase 1 is preferentially located in the designated position on the floor slab and is fixed.

[0051] Rotating the threaded rod 32 in the opposite direction again allows the hydraulic oil inside another hydraulic cylinder 41 to be extracted, and lowers the height of another positioning component 5 until the other end of the precast concrete stair component 1 is tightly attached to the installation position. This further reduces the cost of manual labor without reducing the efficiency of installing the precast concrete stair component 1.

[0052] like Figure 7 and Figure 8 As shown, the support assembly 4 also includes a limiting plate 48 disposed on two opposite sides of the top of the limiting sleeve 42. The outer periphery of the limiting wheel 47 is provided with several slots. The limiting plate 48 is arc-shaped and has protrusions on its inner side that are adapted to the slots.

[0053] Using the above method: Before hoisting the precast concrete staircase 1, it is necessary to manually pull the telescopic plate 44 and make the pad 45 tightly adhere to the bottom of the floor slab installation position. This ensures that after the precast concrete staircase 1 is fixed by the positioning component 5, it will also be in the installation position, reducing the time and effort required for workers to move the precast concrete staircase 1 horizontally. When the precast concrete staircase 1 is lowered by the support component 4, the bottom of the precast concrete staircase 1 will be preferentially located on the top of the two pads 45, thereby reconfirming whether there is any deviation in the installation position.

[0054] Then, the two telescopic plates 44 are pushed in sequence to the outside of the hydraulic cylinder 41. The pad 45 is removed from the bottom of the floor slab. The telescopic plate 44 pushes the limiting sleeve 42 up through the spring telescopic rod 43. At the same time, it compresses the telescopic plate 46 and drives the limiting plate 48 up. The protrusion on the inner wall of the limiting plate 48 then sticks tightly to the groove on the outer periphery of the limiting wheel 47 and fixes its position, thereby preventing the support box 51 from moving through the hinge point of the telescopic end of the hydraulic cylinder 41. This ensures that the positioning component 5 will not be damaged by swinging when the device is not working.

[0055] Working principle and usage process of this invention:

[0056] Manually pull the telescopic plate 44 and make the pad 45 fit tightly against the bottom of the floor slab installation position. Rotate the threaded rod 32 and force the pressure plate 33 to descend and squeeze the hydraulic oil. The hydraulic oil enters the interior of the two hydraulic cylinders 41 through the oil groove 34. The hydraulic cylinders 41 extend and drive the positioning component 5 to rise to the designated position.

[0057] Using a crane, the precast concrete staircase 1 is hoisted to the top of the support box 51 and then slowly lowered so that the bottom of the precast concrete staircase 1 contacts and presses the rubber plate 54. The rubber plate 54 presses the upper ends of the two support plates 55, and their two lower ends move away from each other, thereby squeezing the hydraulic oil inside the hydraulic cylinder 3 56 into the telescopic rod 57 and forcing it to drive the guide rod 584 to extend. The guide rod 584 drives the hydraulic oil between it and the sealing plate 2 583 to move. When the sealing plate 2 583 is tightly attached to the partition, the metal rod will penetrate the hole in the partition, thereby causing the oil pressure to drive the sealing plate 1 582 to move through the metal rod. At the same time, the air between the sealing plate 2 583 and the sealing plate 1 582 is compressed. Due to the compressibility of air, when the precast concrete staircase 1 falls completely into the top of the support box 51 and can no longer be squeezed to move the rubber plate 54, the telescopic end of the hydraulic cylinder 2 52 will slowly move and clamp the precast concrete staircase 1.

[0058] After the two positioning components 5 are completely fixed in position of the precast concrete staircase 1, the threaded rod 32 is rotated in the opposite direction. The hydraulic oil can quickly lower the height of the lower positioning component 5, so that one end of the precast concrete staircase 1 is preferentially located in the designated position on the floor slab and is fixed.

[0059] Rotating the threaded rod 32 in the opposite direction again allows the hydraulic oil inside another hydraulic cylinder 41 to be extracted, and lowers the height of another positioning component 5 until the other end of the precast concrete staircase 1 is in close contact with the installation position.

[0060] Then, the two telescopic plates 44 are pushed in sequence to the outside of the hydraulic cylinder 41. The pad 45 is removed from the bottom of the floor slab. The telescopic plate 44 pushes the limiting sleeve 42 up through the spring telescopic rod 43. At the same time, it compresses the telescopic plate 46 and drives the limiting plate 48 up. The protrusion on the inner wall of the limiting plate 48 then sticks tightly to the groove on the outer periphery of the limiting wheel 47 and fixes its position.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mounting device for precast concrete stair components, comprising a base (2), characterised in that, Also include; Two support assemblies (4) are respectively arranged at the top of the base (2); The hydraulic mechanism (3) is installed on the top of the base (2); The top of each support assembly (4) is respectively provided with a positioning assembly (5); The positioning assembly (5) comprises a support box (51) hinged to the top of the support assembly (4), the top of the support box (51) is hinged with two mutually intersecting support plates (55), one end of the two support plates (55) is commonly and slidingly installed with a rubber plate (54), the inside of the support box (51) is symmetrically provided with two hydraulic cylinders three (56), the inside of the hydraulic cylinder three (56) is filled with hydraulic oil, the other end of the two support plates (55) is respectively hinged with the side of each hydraulic cylinder three (56), the inside of the support box (51) is provided with two hydraulic cylinders two (52) which are relatively symmetrical, the inside of each hydraulic cylinder three (56) is respectively communicated with two telescopic rods (57), the telescopic end of each telescopic rod (57) is respectively fixedly connected with a speed reducer (58); Each speed reducer (58) comprises a sleeve (581) arranged in the fixed end of the hydraulic cylinder two (52), the inside of the sleeve (581) movably arranged with a guide rod (584) connected with the telescopic end of the telescopic rod (57), the inside of the sleeve (581) movably arranged with a sealing plate one (582), the side of the sealing plate one (582) close to the guide rod (584) movably clamped with a sealing plate two (583) through a metal rod, the inside of the sleeve (581) is provided with a partition plate for spacing the sealing plate two (583) and the guide rod (584), and the partition plate is provided with a hole; The end of the sleeve (581) is provided with an opening and is connected with the inside of the hydraulic cylinder two (52), the inside of the hydraulic cylinder two (52) is filled with hydraulic oil, the guide rod (584) and the sealing plate two (583) form a cavity and the inside is filled with hydraulic oil; The hydraulic mechanism (3) controls the lifting of the support box (51) through the support assembly (4); The positioning assembly (5) further comprises a tension spring (59), the lower ends of the two support plates (55) are elastically connected through the tension spring (59), every two speed reducers (58) form a group, and each group of speed reducers (58) is arranged on the two sides of the hydraulic cylinder two (52), the telescopic end of the hydraulic cylinder two (52) is "L" shaped, and a positioning plate (53) is bearing mounted on the opposite side of the telescopic end of the two hydraulic cylinders two (52); The hydraulic mechanism (3) comprises an oil box (31) fixedly arranged on the top of the base (2), the top of the oil box (31) is bearing mounted with a threaded rod (32), the threaded rod (32) is threadedly sleeved with a pressing plate (33) located in the inside of the oil box (31), the inside of the base (2) is provided with an oil groove (34), and the oil groove (34) is connected with the inside of the oil box (31).

2. Mounting arrangement for precast concrete stair components according to claim 1, characterized in that: The pressing plate (33) is matched with the inside of the oil box (31), and the inside of the oil box (31) is filled with hydraulic oil.

3. A mounting arrangement for precast concrete stair components as claimed in claim 1, characterised in that: Each of the support assemblies (4) comprises a hydraulic cylinder (41) fixed to the top of the base (2) and a telescopic plate (44) hinged to the top of the base (2), the telescopic end of the telescopic plate (44) is hinged with a backing plate (45), the outer periphery of the hydraulic cylinder (41) is sleeved with a limiting sleeve (42), the top of the limiting sleeve (42) is connected with the top of the telescopic end of the hydraulic cylinder (41) through a telescopic plate (46), the outer side of the limiting sleeve (42) is movably connected with the fixed end of the telescopic plate (44) through a spring telescopic rod (43), the telescopic end of the hydraulic cylinder (41) is hinged with a support box (51) through a limiting wheel (47).

4. A mounting arrangement for precast concrete stair components according to claim 3, characterised in that: The support assembly (4) further comprises limiting plates (48) arranged on the top of the limiting sleeve (42) on two opposite sides, the outer periphery of the limiting wheel (47) is provided with a plurality of notches, the limiting plates (48) are in the shape of a circular arc and the inner side of each limiting plate (48) is provided with a protrusion matched with the notches.

5. A mounting arrangement for precast concrete stair components as claimed in claim 3 wherein: The interior of each hydraulic cylinder (41) is in communication with the interior of an oil box (31) through an oil groove (34), and the interior of each hydraulic cylinder (41) is filled with hydraulic oil.

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