A prefabricated stair positioning structure

Abstract

The application provides a prefabricated stair positioning structure. The prefabricated stair positioning structure comprises a mounting platform, a prefabricated stair, an alignment mechanism, a compression mechanism, a connecting mechanism, an adjusting mechanism, a lug, a cylinder, a closing mechanism, a support, a compression rod, a second fixing block, a plug, a plurality of limiting rods and a rubber pad. The lug is in abutment with the surface of the prefabricated stair. The inside of the cylinder is slidably connected with the lug which is in the shape of T. The top end of the connecting mechanism is internally provided with the support. The bottom end of the support is fixedly connected with the compression rod. The inside of the connecting mechanism is provided with the funnel-shaped second fixing block. The inside of the second fixing block is engaged with the plug. The top end of the second fixing block is internally provided with a plurality of limiting rods which are fixedly connected with the top surface of the hollow circular truncated cone-shaped rubber pad. The rubber pad is in abutment with the inner side wall of the second fixing block. The rubber pad is slidably connected with the compression rod. The prefabricated stair positioning structure has the advantage of quickly making the prefabricated stair flat plate flush with the surface of the mounting platform.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of prefabricated stair installation, and particularly relates to a prefabricated stair positioning structure. BACKGROUND

[0002] The prefabricated stair is one of the commonly used components in the fabricated building, and the prefabricated components of the prefabricated stair mainly include the concrete prefabricated tread, the platform plate and the supporting structure. The main supporting modes of the stair include the wall bearing type, the cantilever step type and the beam bearing type. The prefabricated stair has the advantages of high efficiency, fast construction speed, controllable quality and the like.

[0003] In the process of installing the prefabricated stair, due to the existence of construction errors, there is a height difference between the prefabricated stair flat plate and the surface of the installation platform, which easily leads to the fact that the prefabricated stair is not flush with the surface of the installation platform after installation, and the height difference between the prefabricated stair flat plate and the surface of the installation platform is difficult to be conveniently filled, thereby reducing the installation quality of the prefabricated stair.

[0004] Therefore, it is necessary to provide a new prefabricated stair positioning structure to solve the above technical problems. SUMMARY

[0005] The technical problem solved by the present application is to provide a prefabricated stair positioning structure capable of quickly making the prefabricated stair flat plate flush with the surface of the installation platform.

[0006] In order to solve the above technical problems, the precast stair positioning structure provided by the present application comprises: a mounting platform; a precast stair fixed to one end of the mounting platform; a positioning mechanism installed on the surface of the mounting platform and in sliding connection with the precast stair; a compression mechanism fixed to one side of the positioning mechanism; a connecting mechanism in communication with the compression mechanism; an adjusting mechanism comprising a protrusion, a cylinder, a limiting block and a water pipe, the protrusion being in abutment with the surface of the precast stair, the cylinder having a "T"-shaped side wall in sliding connection with the protrusion inside; the water pipe being fixedly connected to the bottom end of the cylinder and in communication with the bottom end of the connecting mechanism; the limiting block being symmetrically installed at the bottom end inside the cylinder and in abutment with the bottom surface of the protrusion; a sealing mechanism comprising a support, a second fixing block, a pressing rod, a plug, a limiting rod, a rubber pad and a first spring, the support being installed at the top end inside the connecting mechanism, the bottom end of the support being fixedly connected to the pressing rod; the second fixing block being installed in a funnel shape inside the connecting mechanism, the plug being engaged inside the second fixing block; the first spring being installed at the bottom end of the plug and in abutment with the pressing rod at the top surface of the plug; a plurality of the limiting rods being installed at the top end inside the second fixing block and fixedly connected to the top surface of the hollow circular truncated cone-shaped rubber pad; the rubber pad being in abutment with the inner side wall of the second fixing block and in sliding connection with the pressing rod.

[0007] Preferably, a reserved steel bar is symmetrically arranged on one side of the mounting platform, and a reserved hole is symmetrically arranged on both sides of the precast stair, and the reserved steel bar extends into the inside of the reserved hole.

[0008] Preferably, a rubber plate is laid on the surface of the mounting platform, the rubber plate is in abutment with the side wall of the precast stair, and a plurality of the cylinders are symmetrically installed inside the rubber plate.

[0009] Preferably, the positioning mechanism comprises a base, a positioning plate, a roller, a sliding groove, a first fixing block, a first sliding rod, a piston and a second sliding rod, the base is placed on the surface of the mounting platform, and the sliding groove is symmetrically arranged inside the base; the first fixing block is in sliding connection inside the sliding groove and fixedly connected with the positioning plate; a plurality of the rollers are equidistantly installed on one side of the positioning plate, and the first sliding rod is fixedly connected to the bottom end of the positioning plate; the second sliding rod is fixed to the side wall of the base, the piston and the first sliding rod are in sliding connection inside the second sliding rod, and the first sliding rod is fixedly connected with the piston.

[0010] Preferably, the connecting mechanism comprises a joint, a through hole, a rubber ring and a connecting sleeve, the rubber plate is internally provided with a plurality of the connecting sleeves, the top surface of the connecting sleeve is provided with the through hole, and the bottom end of the connecting sleeve is fixedly connected with the water pipe; the joint is in sliding connection with the connecting sleeve, the side wall of the joint is provided with the hollow circular truncated cone-shaped rubber ring, and the rubber ring is clamped on one side of the through hole.

[0011] Preferably, the compression mechanism comprises a storage box, a hydraulic rod, a hose, a compression plate, a connecting pipe and a valve, one side of the base is provided with the storage box, the top surface of the storage box is provided with the hydraulic rod, the bottom end of the hydraulic rod is fixedly connected with the compression plate, and the compression plate is in sliding connection with the inside of the storage box; the bottom end of the storage box is respectively provided with a plurality of the hose and the connecting pipe, the connecting pipe is in communication with the inside of the second sliding rod, the hose is in fixed connection with the joint, and the side wall of the hose and the connecting pipe is respectively provided with the valve.

[0012] Preferably, the inside of the joint is provided with the support, and the inside of the connecting sleeve is provided with the second fixed block and the first spring.

[0013] Preferably, the plug and the rubber pad are respectively arranged on both sides of the second fixed block, and a plurality of the limiting rods are arranged in the second fixed block in an inclined manner.

[0014] Preferably, the one-way valve comprises a fixed net, a second spring, a notch and a sealing plug, the inside of the pressing rod is provided with the fixed net and the second spring, the two ends of the second spring are respectively connected with the fixed net and the sealing plug, the sealing plug abuts against the surface of the plug, the sealing plug is clamped on the bottom end of the pressing rod, and the bottom end of the pressing rod is provided with the notch.

[0015] Compared with the related art, the prefabricated stair positioning structure has the following beneficial effects:

[0016] The application provides a prefabricated stair positioning structure, when the prefabricated stair is hoisted and lowered to be one meter away from the installation platform, the two ends of the prefabricated stair are in contact with a plurality of alignment mechanisms respectively, the alignment mechanisms clamp the prefabricated stair, the prefabricated stair moves vertically downward to be installed on the surface of the installation platform, and the position of the prefabricated stair is prevented from deviating during installation; when the surface of the prefabricated stair is not flat with the surface of the installation platform after installation is completed, the driving mechanism is opened, the driving mechanism operates to press liquid into the inside of the connecting mechanism, at this time, the pressing rod in the inside of the connecting mechanism extrudes the plug downward, the plug is separated from the second fixed block, the liquid in the inside of the connecting mechanism extrudes the rubber pad in the inside of the second fixed block downward, the rubber pad shrinks and is separated from the inner side wall of the second fixed block, liquid penetrates through the second fixed block, the connecting mechanism and the water pipe into the inside of the cylinder, the liquid in the inside of the cylinder extrudes the convex block upward, the convex block moves upward from the inside of the cylinder, the convex block extrudes the prefabricated stair upward, and the height of the prefabricated stair is changed; the bottom end of the prefabricated stair is provided with a plurality of convex blocks, the height of each convex block is controlled to rise upward, the convex blocks lift the surface of the prefabricated stair to be in a horizontal state, the surface of the prefabricated stair is quickly leveled with the surface of the installation platform, and the installation quality of the prefabricated stair is improved; when the convex blocks lift the prefabricated stair, the prefabricated stair extrudes the convex blocks reversely, the convex blocks extrude the liquid in the inside of the cylinder and the connecting mechanism, the liquid moves upward into the inside of the second fixed block reversely, the liquid extrudes the rubber pad in the inside of the second fixed block upward, the rubber pad is opened upward and tightly adheres to the inner side wall of the second fixed block, meanwhile, the limiting rod in the inside of the second fixed block presses the rubber pad, the rubber pad is prevented from turning upward, the rubber pad seals the inside of the second fixed block, and the upward extrusion force of the rubber pad is transmitted to the limiting rod and the side wall of the second fixed block, liquid is prevented from extruding the weak part of the connecting mechanism, and the stability of the connecting mechanism as a whole is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structural schematic diagram of the prefabricated stair positioning structure provided by the application is shown in the figure.

[0018] Figure 2 The prefabricated stair installation structure shown in the figure is shown in the figure. Figure 1 The structural enlarged schematic diagram of A shown in the figure is shown in the figure.

[0019] Figure 3 The structural enlarged schematic diagram of B shown in the figure is shown in the figure. Figure 2 The structural enlarged schematic diagram of C shown in the figure is shown in the figure.

[0020] Figure 4 The structural enlarged schematic diagram of D shown in the figure is shown in the figure. Figure 3The internal structure of the base is shown in the schematic view;

[0021] Figure 5 For Figure 1 The internal structure of the rubber plate is shown in the schematic view;

[0022] Figure 6 For Figure 3 The internal structure of the rubber plate is shown in the schematic view;

[0023] Figure 7 For Figure 6 The internal structure of the rubber plate is shown in the schematic view;

[0024] Figure 8 For Figure 7 The internal structure of the rubber plate is shown in the schematic view;

[0025] Figure 9 For Figure 7 The internal structure of the rubber plate is shown in the schematic view.

[0026] The internal structure of the rubber plate is shown in the schematic view; DETAILED DESCRIPTION

[0027] The application will be further described below in conjunction with the drawings and embodiments.

[0028] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 . Figure 1 The internal structure of the rubber plate is shown in the schematic view; Figure 2 The internal structure of the rubber plate is shown in the schematic view; Figure 1 The internal structure of the rubber plate is shown in the schematic view; Figure 3 The internal structure of the rubber plate is shown in the schematic view;Figure 2 An enlarged view of the structure at A shown in FIG. 1; Figure 4 An enlarged view of the structure at A shown in FIG. 1; Figure 3 An enlarged view of the structure at A shown in FIG. 1; Figure 5 An enlarged view of the structure at A shown in FIG. 1; Figure 1 An enlarged view of the structure at A shown in FIG. 1; Figure 6 An enlarged view of the structure at A shown in FIG. 1; Figure 3 An enlarged view of the structure at A shown in FIG. 1; Figure 7 An enlarged view of the structure at A shown in FIG. 1; Figure 6 An enlarged view of the structure at A shown in FIG. 1; Figure 8 An enlarged view of the structure at A shown in FIG. 1; Figure 7 An enlarged view of the structure at A shown in FIG. 1; Figure 9 An enlarged view of the structure at A shown in FIG. 1; Figure 7 An enlarged view of the structure at A shown in FIG. 1; wherein the prefabricated stair positioning structure comprises: a mounting platform 2; a prefabricated stair 1 fixed to one end of the mounting platform 2; a positioning mechanism 4 installed on the surface of the mounting platform 2, and the positioning mechanism 4 is in sliding connection with the prefabricated stair 1; a compression mechanism 3 fixed to one side of the positioning mechanism 4; a connecting mechanism 6 in communication with the compression mechanism 3; an adjusting mechanism 5 comprising a protrusion 51, a cylinder 52, a limiting block 53, and a water pipe 54, the protrusion 51 abuts against the surface of the prefabricated stair 1, the inside of the cylinder 52 is in sliding connection with the protrusion 51 with a "T"-shaped side wall; the bottom end of the cylinder 52 is fixedly connected with the water pipe 54, and the water pipe 54 is in communication with the bottom end of the connecting mechanism 6; the inside of the bottom end of the cylinder 52 is symmetrically installed with the limiting block 53, and the limiting block 53 abuts against the bottom surface of the protrusion 51; a sealing mechanism 7 comprising a bracket 71, a second fixed block 72, a compression rod 73, a plug 74, a limiting rod 75, a rubber pad 76, and a first spring 77, the top end of the connecting mechanism 6 is internally installed with the bracket 71, and the bottom end of the bracket 71 is fixedly connected with the compression rod 73; the inside of the connecting mechanism 6 is installed with the funnel-shaped second fixed block 72, and the inside of the second fixed block 72 is engaged with the plug 74; the bottom end of the plug 74 is installed with the first spring 77, and the top surface of the plug 74 abuts against the compression rod 73; the top end of the second fixed block 72 is internally installed with a plurality of limiting rods 75, and the limiting rods 75 are fixedly connected with the top surface of the hollow circular truncated cone-shaped rubber pad 76; the rubber pad 76 abuts against the inner side wall of the second fixed block 72, and the rubber pad 76 is in sliding connection with the compression rod 73.

[0029] The one side of mounting platform 2 symmetry is equipped with reserved reinforcement 21, both sides of prefabricated stair 1 is equipped with reserved hole 11 respectively, the reserved reinforcement 21 extends into the inside of reserved hole 11, the surface of mounting platform 2 is paved with rubber plate 22, the rubber plate 22 is in contact with the side wall of prefabricated stair 1, and the inside of rubber plate 22 is symmetrically installed with a plurality of cylinder 52, so that when the prefabricated stair 1 is placed on the mounting platform 2, the reserved reinforcement 21 enters the reserved hole 11, and the mounting platform 2 and the prefabricated stair 1 are spliced.

[0030] The compression mechanism 3 includes a storage tank 31, a hydraulic rod 32, a hose 33, a compression plate 34, a connecting pipe 35 and a valve 36, one side of the base 41 is installed with the storage tank 31, the top surface of the storage tank 31 is installed with the hydraulic rod 32, the bottom end of the hydraulic rod 32 is fixedly connected with the compression plate 34, and the compression plate 34 is slidingly connected with the inside of the storage tank 31; the bottom end of the storage tank 31 is respectively installed with a plurality of hoses 33 and the connecting pipe 35, the connecting pipe 35 communicates with the inside of the second sliding rod 48, the hose 33 is fixedly connected with the joint 61, and the side walls of the hose 33 and the connecting pipe 35 are respectively installed with the valve 36; in order to facilitate the operation of the hydraulic rod 32 to push the compression plate 34 to move in the inside of the storage tank 31, the liquid in the inside of the storage tank 31 enters the inside of the hose 33 and the connecting pipe 35, so as to control the movement of the alignment mechanism 4 and the adjusting mechanism 5.

[0031] The alignment mechanism 4 comprises a base 41, a positioning plate 42, rollers 43, a sliding groove 44, a fixed block 45, a first sliding rod 46, a piston 47 and a second sliding rod 48, the surface of the mounting platform 2 is provided with the base 41, the inside of the base 41 is symmetrically provided with the sliding groove 44; the inside of the sliding groove 44 is slidably connected with the fixed block 45, and the fixed block 45 is fixedly connected with the positioning plate 42; a plurality of rollers 43 are equidistantly mounted on one side of the positioning plate 42, and the bottom end of the positioning plate 42 is fixedly connected with the first sliding rod 46; the second sliding rod 48 is fixed to the side wall of the base 41, the inside of the second sliding rod 48 is slidably connected with the piston 47 and the first sliding rod 46, and the first sliding rod 46 is fixedly connected with the piston 47. When the base 41 is prevented on the surface of the mounting platform 2, the valve 36 on the side wall of the connecting pipe 35 is opened, the liquid in the storage box 31 enters the inside of the second sliding rod 48 through the connecting pipe 35, the liquid pushes the piston 47 and the first sliding rod 46 to move in the inside of the second sliding rod 48, the first sliding rod 46 pushes the positioning plate 42 and the fixed block 45 to move, the fixed block 45 moves along the sliding groove 44, the stability of the sliding of the positioning plate 42 is increased, the movement of the positioning plate 42 drives the movement of the rollers 43, the movement of the rollers 43 is aligned with the positioning and mounting line of the prefabricated stair 1 on the surface of the mounting platform 2, so that the rollers 43 contact the prefabricated stair 1, and the prefabricated stair 1 is accurately installed on the surface of the mounting platform 2 in a downward vertical movement.

[0032] The connecting mechanism 6 comprises a connector 61, a through hole 62, a rubber ring 63 and a connecting sleeve 64, a plurality of connecting sleeves 64 are mounted in the inside of the rubber plate 22, the top surface of the connecting sleeve 64 is provided with the through hole 62, and the bottom end of the connecting sleeve 64 is fixedly connected with the water pipe 54; the connector 61 is slidably connected with the connecting sleeve 64, the hollow circular truncated cone-shaped rubber ring 63 is mounted on the side wall of the connector 61, and the rubber ring 63 clamps one side of the through hole 62; when the connector 61 is spliced with the connecting sleeve 64, the connector 61 is put into the inside of the connecting sleeve 64, the connector 61 drives the elastic rubber ring 63 to penetrate through the through hole 62 and enter the inside of the connecting sleeve 64, the rubber ring 63 is in a hollow funnel shape, the rubber ring 63 penetrates through the through hole 62 and enters the inside of the connecting sleeve 64 to expand and clamp the inside of the connecting sleeve 64, so that the connector 61 is fixed in the inside of the connecting sleeve 64.

[0033] The inside of the joint 61 is installed with the support 71, the inside of the connecting sleeve 64 is installed with the second fixed block 72 and the first spring 77, in order to facilitate the joint 61 to drive the support 71 and the pressing rod 73 to move downward into the inside of the second fixed block 72, the pressing rod 73 pushes the cork 74 to move downward and separate from the second fixed block 72 while compressing the first spring 77.

[0034] The cork 74 and the rubber pad 76 are respectively arranged on both sides of the second fixed block 72, and a plurality of limiting rods 75 are arranged obliquely in the inside of the second fixed block 72, in order to facilitate the rubber pad 76 to expand and tightly adhere to the inner side wall of the second fixed block 72, so that the rubber pad 76 separates the liquid in the inside of the connecting sleeve 64, avoiding that the upward thrust of the liquid in the inside of the connecting sleeve 64 to the joint 61 is too large.

[0035] The one-way valve 8 includes a fixed net 81, a second spring 82, a notch 83 and a sealing plug 84, the inside of the pressing rod 73 is installed with the fixed net 81 and the second spring 82, both ends of the second spring 82 are respectively connected with the fixed net 81 and the sealing plug 84, the sealing plug 84 abuts against the surface of the cork 74; the sealing plug 84 engages the bottom end of the pressing rod 73, and the bottom end of the pressing rod 73 is provided with the notch 83; in order to generate suction in the inside of the pressing rod 73 and the hose 33 when the protruding block 51 moves downward, so that the sealing plug 84 moves upward to open the pressing rod 73, and the liquid in the inside of the connecting sleeve 64 moves upward through the notch 83 and the fixed net 81, reducing the liquid in the inside of the connecting sleeve 64.

[0036] The working principle of the prefabricated stair positioning structure comprises the following steps: placing the rubber plate 22 on the surface of the installation platform 2, and then placing the steel base 41 on the surface of the installation platform 2. The joint 61 is placed in the inside of the connecting sleeve 64, the joint 61 drives the elastic rubber ring 63 to pass through the through hole 62 and enter the inside of the connecting sleeve 64, the rubber ring 63 is in a hollow funnel shape, the rubber ring 63 passes through the through hole 62 and enters the inside of the connecting sleeve 64 to support and engage the inside of the connecting sleeve 64, so as to fix the joint 61 in the inside of the connecting sleeve 64, and at the same time, the joint 61 drives the support 71 and the pressing rod 73 to enter the inside of the connecting sleeve 64, the pressing rod 73 passes through the rubber pad 76 and contacts the plug 74, the pressing rod 73 pushes the plug 74 to move downward to open the second fixing block 72 and compress the first spring 77. The hydraulic rod 32 is connected with a power supply, the valve 36 on the side wall of the connecting pipe 35 is opened, the hydraulic rod 32 operates to push the compression plate 34 to move in the inside of the storage box 31, the liquid in the inside of the storage box 31 enters the inside of the connecting pipe 35, the liquid in the inside of the storage box 31 enters the inside of the second sliding rod 48 through the connecting pipe 35, the liquid pushes the piston 47 and the first sliding rod 46 to move in the inside of the second sliding rod 48, the first sliding rod 46 pushes the positioning plate 42 and the fixing block 45 to move, the fixing block 45 moves along the sliding groove 44 to increase the stability of the sliding of the positioning plate 42, the movement of the positioning plate 42 drives the movement of the roller 43, and the roller 43 moves to be aligned with the positioning and installation line of the prefabricated stair 1 on the surface of the installation platform 2. The prefabricated stair 1 is hoisted by using a crane, when the prefabricated stair 1 is more than 1 m away from the installation platform 2, the worker moves the prefabricated stair 1, the reserved hole 11 on the surface of the prefabricated stair 1 is aligned with the reserved steel bar 21, the prefabricated stair 1 is vertically placed downward, and the prefabricated stair 1 is in contact with the roller 43 (as shown in the attached Figure 1When the installation is completed, if the surface of the prefabricated stair 1 is not level with the surface of the installation platform 2, the valve 36 on the side wall of the hydraulic rod 32 and the hose 33 is opened, the liquid in the storage tank 31 is pressed into the inside of the joint 61 and the second fixed block 72, the liquid in the inside of the second fixed block 72 extrudes the rubber pad 76 downwards, the elastic rubber pad 76 is separated from the inside wall of the second fixed block 72, the liquid can pass through the second fixed block 72, the connecting sleeve 64 and the water pipe 54 into the inside of the cylinder 52, the liquid in the inside of the cylinder 52 extrudes the convex block 51 upwards, the convex block 51 moves upwards from the inside of the cylinder 52, the convex block 51 extrudes the prefabricated stair 1 upwards, the height of the prefabricated stair 1 is changed; the bottom end of the prefabricated stair 1 is installed with multiple convex blocks 51, each convex block 51 can move upwards individually, when a convex block 51 moves downwards, the valve 36 corresponding to the convex block 51 is opened, the hydraulic rod 32 operates to contract, the compression plate 34 moves upwards, the inside of the hose 33 and the compression rod 73 generates suction, the sealing plug 84 moves upwards to open the compression rod 73, the liquid in the inside of the connecting sleeve 64 moves upwards through the gap 83 and the fixed net 81, the liquid in the inside of the connecting sleeve 64 is reduced, the convex block 51 moves downwards. By controlling the height of each convex block 51 rising upwards, the convex block 51 lifts the surface of the prefabricated stair 1 to make it level, at the same time, the surface of the prefabricated stair 1 is level with the surface of the installation platform 2 (as shown in FIG. 1 1 ). Figure 2When the protruding block 51 lifts the prefabricated stair 1, the prefabricated stair 1 reversely extrudes the protruding block 51, the protruding block 51 extrudes the liquid inside the cylinder 52 and the connecting sleeve 64, and the liquid reversely moves upward into the inside of the second fixing block 72, the liquid extrudes the rubber pad 76 inside the second fixing block 72 upward, the rubber pad 76 is tightly attached to the inner side wall of the second fixing block 72, and the limiting rod 75 inside the second fixing block 72 presses the rubber pad 76, so that the rubber pad 76 is prevented from being turned upward, the rubber pad 76 seals the inside of the second fixing block 72, and the upward extrusion force of the rubber pad 76 is transmitted to the limiting rod 75 and the side wall of the second fixing block 72, the sealing plug 84 inside the pressing rod 73 abuts against the plug 74, the contact area of the liquid with the plug 74 is reduced, the extrusion force of the liquid on the plug 74 is reduced, the extrusion force of the liquid on the joint 61 is reduced, and the stability of the joint 61 and the connecting sleeve 64 is increased. When the installation is completed, the joint 61 is pulled out from the inside of the connecting sleeve 64, the first spring 77 pushes the plug 74 to move upward, the plug 74 seals the inside of the second fixing block 72, the protruding block 51 is prevented from moving downward, and the position of the prefabricated stair 1 is unchanged.

[0037] The above description is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is based on the content of the specification and drawings, is also included in the patent protection scope of the present application.

Claims

1. A prefabricated stair positioning structure, characterized in that The utility model relates to a prefabricated stair fixing device, which comprises the following parts: An installation platform (2); A prefabricated stair (1) fixed to one end of the installation platform (2); An alignment mechanism (4) installed on the surface of the installation platform (2) and in sliding connection with the prefabricated stair (1); A compression mechanism (3) fixed to one side of the alignment mechanism (4), which comprises a storage box (31), a hydraulic rod (32), a hose (33), a compression plate (34), a connecting pipe (35) and a valve (36), the top surface of the storage box (31) is provided with the hydraulic rod (32), the bottom end of the hydraulic rod (32) is fixedly connected with the compression plate (34), and the compression plate (34) is in sliding connection with the inside of the storage box (31); the bottom end of the storage box (31) is provided with a plurality of hoses (33) and connecting pipes (35), respectively, and the side walls of the hoses (33) and the connecting pipes (35) are provided with the valves (36), respectively; the hydraulic rod (32) operates to push the compression plate (34) to move inside the storage box (31), so that the liquid inside the storage box (31) enters the inside of the hoses (33) and the connecting pipes (35), thereby controlling the movement of the alignment mechanism (4) and the adjusting mechanism (5); A connecting mechanism (6) in communication with the compression mechanism (3); An adjusting mechanism (5) comprising a protruding block (51), a cylinder (52), a limiting block (53) and a water pipe (54), the protruding block (51) abuts against the surface of the prefabricated stair (1), the cylinder (52) is in sliding connection with the protruding block (51) with a "T"-shaped side wall inside; the bottom end of the cylinder (52) is fixedly connected with the water pipe (54), and the water pipe (54) is in communication with the bottom end of the connecting mechanism (6); the inside bottom end of the cylinder (52) is symmetrically provided with the limiting block (53), and the limiting block (53) abuts against the bottom surface of the protruding block (51). The closing mechanism (7) comprises a support (71), a second fixed block (72), a pressing rod (73), a plug (74), a limiting rod (75), a rubber pad (76) and a first spring (77), the top end of the connecting mechanism (6) is internally provided with the support (71), and the bottom end of the support (71) is fixedly connected with the pressing rod (73); the connecting mechanism (6) is internally provided with the funnel-shaped second fixed block (72), the second fixed block (72) is internally clamped with the plug (74); the bottom end of the plug (74) is provided with the first spring (77), and the top surface of the plug (74) abuts against the pressing rod (73); the top end of the second fixed block (72) is internally provided with a plurality of limiting rods (75), and the limiting rods (75) are fixedly connected with the top surface of the hollow circular truncated cone-shaped rubber pad (76); the rubber pad (76) abuts against the inner side wall of the second fixed block (72), and the rubber pad (76) is in sliding connection with the pressing rod (73); The one-way valve (8) is internally arranged in the pressing rod (73).

2. The pre-fabricated stair positioning structure according to claim 1, wherein, A reserved steel bar (21) is symmetrically arranged on one side of the mounting platform (2), and a reserved hole (11) is symmetrically arranged on the two sides of the prefabricated stair (1), and the reserved steel bar (21) extends into the inside of the reserved hole (11).

3. The pre-fabricated stair positioning structure according to claim 2, wherein, A rubber plate (22) is arranged on the surface of the mounting platform (2), the rubber plate (22) abuts against the side wall of the prefabricated stair (1), and a plurality of cylinder bodies (52) are symmetrically arranged in the rubber plate (22).

4. The pre-fabricated stair positioning structure according to claim 3, wherein, The alignment mechanism (4) comprises a base (41), a positioning plate (42), a roller (43), a sliding groove (44), a first fixed block (45), a first sliding rod (46), a piston (47) and a second sliding rod (48), the base (41) is arranged on the surface of the mounting platform (2), the storage box (31) is arranged on one side of the base (41), and the sliding groove (44) is symmetrically arranged in the base (41); the first fixed block (45) is in sliding connection with the sliding groove (44), and the first fixed block (45) is fixedly connected with the positioning plate (42); a plurality of rollers (43) are equidistantly arranged on one side of the positioning plate (42), and the bottom end of the positioning plate (42) is fixedly connected with the first sliding rod (46); the second sliding rod (48) is fixed to the side wall of the base (41), the piston (47) and the first sliding rod (46) are in sliding connection with the inside of the second sliding rod (48), and the first sliding rod (46) is fixedly connected with the piston (47).

5. The pre-fabricated stair positioning structure according to claim 4, wherein, The connecting mechanism (6) comprises a joint (61), a through hole (62), a rubber ring (63) and a connecting sleeve (64), the rubber plate (22) is internally provided with a plurality of connecting sleeves (64), the top surface of the connecting sleeve (64) is provided with the through hole (62), and the bottom end of the connecting sleeve (64) is fixedly connected with the water pipe (54); the joint (61) is in sliding connection with the connecting sleeve (64), the side wall of the joint (61) is provided with the hollow circular truncated cone-shaped rubber ring (63), and the rubber ring (63) is clamped on one side of the through hole (62); the connecting pipe (35) is in communication with the inside of the second sliding rod (48), and the hose (33) is fixedly connected with the joint (61).

6. The pre-fabricated stair positioning structure according to claim 5, wherein, The inside of the joint (61) is provided with the support (71), and the inside of the connecting sleeve (64) is provided with the second fixed block (72) and the first spring (77).

7. The pre-fabricated stair positioning structure according to claim 1, wherein, The plug (74) and the rubber pad (76) are arranged on the two sides of the second fixed block (72) respectively, and a plurality of limiting rods (75) are arranged in the second fixed block (72) in an inclined manner.

8. The pre-fabricated stair positioning structure according to claim 1, wherein, The one-way valve (8) comprises a fixed net (81), a second spring (82), a notch (83) and a sealing plug (84), the inside of the pressing rod (73) is provided with the fixed net (81) and the second spring (82), the two ends of the second spring (82) are connected with the fixed net (81) and the sealing plug (84) respectively, and the sealing plug (84) abuts against the surface of the plug (74); the sealing plug (84) is clamped on the bottom end of the pressing rod (73), and the bottom end of the pressing rod (73) is provided with the notch (83).

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