CN213707530U - Adopt truss structure's prefabricated stair hoist device of assembled - Google Patents

Adopt truss structure's prefabricated stair hoist device of assembled Download PDF

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Publication number
CN213707530U
CN213707530U CN202022814341.6U CN202022814341U CN213707530U CN 213707530 U CN213707530 U CN 213707530U CN 202022814341 U CN202022814341 U CN 202022814341U CN 213707530 U CN213707530 U CN 213707530U
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China
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truss structure
track
prefabricated staircase
prefabricated
truss
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Inventor
裴桐
刘天阳
易智煜
张天笑
李卓文
陶佩
马万龙
高元江
王升
贾子超
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China Construction First Group Construction and Development Co Ltd
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China Construction First Group Construction and Development Co Ltd
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Abstract

The utility model discloses an adopt truss structure's prefabricated stair hoist device of assembled, it includes prefabricated stair mounting structure and lifts by crane the mechanism, and prefabricated stair mounting structure includes: the truss structure comprises truss structure rails, two truss structure rails are arranged in parallel, and a plurality of structure connecting positions are arranged at the bottom of each truss structure rail at intervals; the truss structure comprises a truss structure main beam and vertical support frames, the two vertical support frames are symmetrically arranged in the two truss structure tracks and are in sliding connection with the truss structure tracks, the truss structure main beam is arranged at the tops of the vertical support frames, two ends of the truss structure main beam are respectively fixedly connected with the tops of the two vertical support frames, and the truss structure main beam is perpendicular to the truss structure tracks; wherein, the hoisting mechanism is fixedly arranged at the middle position of the bottom of the girder of the truss structure. The utility model discloses an assembled prefabricated staircase hoist device is little to the construction influence on every side, and the security is high, and the installation rate is fast.

Description

Adopt truss structure's prefabricated stair hoist device of assembled
Technical Field
The utility model relates to a construction technical field, concretely relates to adopt truss structure's prefabricated stair hoist device.
Background
With the continuous popularization of the assembly type building and the improvement of the requirement of the assembly rate, the proportion of the assembly type prefabricated staircase used in the high-rise building gradually rises. The application of the prefabricated staircase saves the complex working procedures of template erection, reinforcement, concrete pouring and the like in the construction of the cast-in-place staircase, can make up the defect that the requirement cannot be met only by depending on the assembly rate of prefabricated walls and plates, and has the advantages of high installation speed, convenience and quickness in construction, short construction period and cost saving. But simultaneously, because assembled prefabricated staircase dead weight is great, also brought very big degree of difficulty for the hoist and mount construction operation.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an adopt prefabricated stair hoist device of assembled of truss structure to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides an adopt prefabricated staircase hoist device of assembled of truss structure, including prefabricated staircase mounting structure and hoisting mechanism, wherein, prefabricated staircase mounting structure includes: the truss structure comprises truss structure rails, two truss structure rails are arranged in parallel, and a plurality of structure connecting positions are arranged at the bottom of each truss structure rail at intervals; the truss structure comprises a truss structure main beam and vertical support frames, the two vertical support frames are symmetrically arranged in the two truss structure tracks and are in sliding connection with the truss structure tracks, the truss structure main beam is arranged at the tops of the vertical support frames, two ends of the truss structure main beam are respectively fixedly connected with the tops of the two vertical support frames, and the truss structure main beam is perpendicular to the truss structure tracks; and wherein, the hoisting mechanism is fixedly arranged at the middle position of the bottom of the truss structure main beam, the hoisting mechanism comprises an electric hoist, and the electric hoist is fixedly connected with the bottom of the truss structure main beam.
In a preferred embodiment, the top of the truss structure track is provided with a slotted steel track, the top of the truss structure track and two ends located in the channel steel track are provided with vertical limit baffles, the vertical limit baffles are fixedly connected with the truss structure track through triangular baffle inclined struts, and the inner side surfaces of the two vertical limit baffles are abutted to the two ends of the channel steel track.
In a preferred embodiment, the truss structure track all is provided with the track structure of preventing toppling along length direction both ends and middle part position, the track structure of preventing toppling includes track backplate and the swash plate of preventing toppling, the track backplate is the rectangle steel sheet, track backplate level sets up the both sides in truss structure track bottom, the vertical setting of swash plate of preventing toppling, the swash plate of preventing toppling is the right trapezoid structure, the right-angle side of the vertical direction of the swash plate of preventing toppling and the orbital side fixed connection of truss structure, the right-angle side of the horizontal direction of the swash plate of preventing toppling and the last fixed surface of track backplate are connected.
In a preferred embodiment, the truss structure rail is an i-shaped structure, the top and the bottom of the overturn-preventing sloping plate are fixedly connected with the inner sides of the top and the bottom of the i-shaped truss structure rail respectively, bolt holes are symmetrically formed in two sides of the overturn-preventing sloping plate on the rail back plate, and the truss structure rail is fixedly connected with the stair position structure through expansion bolts and the bolt holes.
In a preferred embodiment, a hand hoist is mounted on a lifting hook of the electric hoist, and the hand hoist is connected with the prefabricated staircase through a steel wire rope.
In a preferred embodiment, the bottom of the vertical support frame is provided with an orientation wheel and an orientation wheel, the orientation wheel is arranged inside the channel steel rail and can slide in the channel steel rail in an oriented mode.
In a preferred embodiment, the two vertical support frames are fixedly connected through two groups of lateral reinforcement square steels, and each group of lateral reinforcement square steels are two obliquely arranged square steel pipes.
In a preferred embodiment, each vertical support frame comprises a horizontal support steel plate, a frame body, a horizontal support and an inclined support, wherein the frame body is of a triangular structure, a plurality of horizontal supports are arranged between two vertical side frames of the frame body at intervals, the horizontal support steel plate is horizontally arranged at the top of the frame body, two ends of each inclined support are fixedly connected with the frame body and the horizontal support steel plate respectively and form a triangular structure, and a girder of the truss structure is welded with the top of the horizontal support steel plate.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the influence on the surrounding construction is small, the prefabricated staircase is hoisted through the tower crane and the profile steel truss device, the occupied time of the tower crane is reduced, the other subsection construction is not influenced, the hoisting by using a large truck crane is avoided, and the occupation on a site construction site and a construction road is reduced;
(2) the safety is high. The profile steel truss device adopts a matched rail and is matched with the movable fixed snap ring, so that the potential safety hazard that the truss structure can be derailed in the hoisting, moving and lowering installation processes of the prefabricated staircase is solved;
(3) the installation speed is fast, and is efficient. The utility model discloses use the tower crane to hoist prefabricated staircase after the split to the roofing carrier on, use the prefabricated staircase after the carrier will split to hang heavy within range from the tower crane and remove to the stairwell position, use the vertical hoisting that prefabricated staircase was accomplished to truss structure at last. The tower crane hoisting and the truss structure installation can be carried out according to flowing water, the integral installation speed is high, and the construction efficiency is high;
(4) the installation accuracy is high. Adopt the mode that electric block and hand block combined together, realized the flat of prefabricated bench and hung, angular adjustment and transfer the installation, ensured the safe accuracy of work progress.
Drawings
Fig. 1 is a schematic perspective view of an assembled prefabricated staircase hoisting device (hoisting mechanism not shown) adopting a truss structure according to a preferred embodiment of the present invention.
Fig. 2 is a side view of an assembled prefabricated staircase lifting device (a lifting mechanism is not shown) adopting a truss structure according to a preferred embodiment of the present invention.
Fig. 3 is a schematic structural view of the vertical supporting frame of the present invention.
Fig. 4 is a schematic structural diagram of the truss structure track of the present invention.
Fig. 5 is a schematic view of the installation structure of the prefabricated staircase according to an embodiment of the present invention.
Fig. 6 is a flow chart of the construction method for hoisting prefabricated staircases according to an embodiment of the present invention.
Fig. 7 is an angle adjustment schematic diagram of the prefabricated staircase according to an embodiment of the present invention.
Fig. 8 is a schematic view of height adjustment of the prefabricated staircase according to an embodiment of the present invention.
Fig. 9 is a schematic view of a structure of fixing a truss structure and a truss structure track by using snap rings according to an embodiment of the present invention.
Description of reference numerals:
1-truss structure girder, 2-vertical support frame, 21-horizontal support steel plate, 22-frame body, 23-transverse support, 24-oblique support, 25-directional wheel, 3-lateral reinforcement square steel, 4-truss structure rail, 41-triangular baffle inclined strut, 42-vertical limit baffle, 43-channel steel rail, 45-rail back plate 46-overturn preventing inclined plate, 47-bolt hole, 5-inter-stair position structure, 6-expansion bolt, 7-prefabricated stair, 81-electric block, 82-manual block, 83-steel wire rope, 84-lifting hook, 9-round steel snap ring and 10-structure top plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below. The embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative work, all belong to the protection scope of the present invention.
Example 1:
as shown in fig. 1-5, the utility model discloses preferred embodiment's assembled prefabricated staircase hoist device who adopts truss structure, including prefabricated staircase mounting structure and hoisting mechanism, wherein, prefabricated staircase mounting structure includes: truss structure track 4 and truss structure. Two truss structure tracks 4 parallel arrangement, truss structure track 4 bottom interval is provided with a plurality of structural connection positions. The truss structure comprises truss structure main beams 1 and vertical support frames 2, wherein the two vertical support frames 2 are symmetrically arranged in two truss structure tracks 4 and are in sliding connection with the truss structure tracks 4. Truss structure girder 1 sets up at the top of vertical support frame 2, and truss structure girder 1's both ends respectively with the top fixed connection of two vertical support frames 2 to truss structure girder 1 is mutually perpendicular with truss structure track 4. And wherein, the fixed intermediate position that sets up in truss structure girder 1 bottom of hoisting mechanism, hoisting mechanism is used for hoisting prefabricated staircase 7 or transferring prefabricated staircase 7 to the assigned position. The hoisting mechanism comprises an electric hoist 81, and the electric hoist 81 is fixedly connected with the bottom of the truss structure main beam 1.
In a preferred embodiment, the top of the truss structure track 4 is provided with a channel steel track 43, the top of the truss structure track 4 and two ends located at the channel steel track 43 are provided with vertical limit baffles 42, the vertical limit baffles 42 are fixedly connected with the truss structure track 4 through triangular baffle inclined struts 41, and inner side surfaces of the two vertical limit baffles 42 are abutted to the two ends of the channel steel track 43.
In the above scheme, truss structure track 4 all is provided with the track along length direction both ends and middle part position and prevents the structure of toppling, and the track prevents the structure of toppling and includes track backplate 45 and anti-overturning swash plate 46, and track backplate 45 is the rectangle steel sheet, and track backplate 45 level sets up the both sides in truss structure track 4 bottom. The anti-overturning sloping plate 46 is vertically arranged, the anti-overturning sloping plate 46 is of a right trapezoid structure, the right-angle side of the vertical direction of the anti-overturning sloping plate 46 is fixedly connected with the side surface of the truss structure track 4, and the right-angle side of the horizontal direction of the anti-overturning sloping plate 46 is fixedly connected with the upper surface of the track back plate 45. The truss structure track 4 is of an I-shaped structure, the top and the bottom of the overturn-preventing sloping plate 46 are fixedly connected with the inner side of the top and the inner side of the bottom of the I-shaped truss structure track 4 respectively, bolt holes 47 are symmetrically formed in two sides of the overturn-preventing sloping plate 46 on the track back plate 45, and the truss structure track 4 is fixedly connected with the stair position structure 5 through expansion bolts 6 and the bolt holes 47.
In a preferred embodiment, a hand block 82 is mounted on a hook 84 of the electric block 81, and the hand block 82 is connected with the prefabricated staircase 7 through a wire rope 83.
In a preferred embodiment, the bottom of the vertical support frame 2 is provided with an orientation wheel 25, the orientation wheel 25 is arranged inside the channel steel rail 43 and can slide in the channel steel rail 43 in an oriented manner, the two vertical support frames 2 are fixedly connected through two groups of lateral reinforcement square steels 3, and each group of lateral reinforcement square steels 3 is two obliquely arranged square steel pipes.
In a preferred embodiment, each vertical support frame 2 comprises a horizontal support steel plate 21, a frame body 22, a plurality of horizontal supports 23 and an inclined support 24, wherein the frame body 22 is of a triangular structure, the plurality of horizontal supports 23 are arranged between two vertical side frames of the frame body 22 at intervals, the horizontal support steel plate 21 is horizontally arranged at the top of the frame body 22, two ends of each of the two inclined supports 24 are respectively and fixedly connected with the frame body 22 and the horizontal support steel plate 21 to form a triangular structure, and the truss structure girder 1 is welded to the top of the horizontal support steel plate 21.
Example 2:
in another preferred embodiment, as shown in fig. 9, the prefabricated staircase installation structure further comprises a round steel snap ring 9 for fixing the truss structure and the truss structure rail together, so as to prevent the fixed pulley from jumping out of the truss structure rail 4 due to excessive acceleration during the hoisting process of the prefabricated staircase.
In the present embodiment, the horizontal support steel plate 21 has a specification of 800mm × 300mm and a thickness of 10 mm.
The specification of the lateral reinforcing square steel 3 is 40mm × 40mm × 3 mm. The track back plate 45 is a steel plate with the specification of 200mm multiplied by 500mm multiplied by 10mm, and the overturn-preventing sloping plate 46 is a trapezoidal steel plate with the thickness of 10 mm. The vertical limiting baffle 42 is a steel plate with the specification of 150mm multiplied by 100mm multiplied by 10mm, and the triangular baffle inclined strut 41 is a right-angled triangular steel plate with the thickness of 10 mm.
Example 3:
as shown in FIG. 6, the construction method for hoisting prefabricated stairs by using the hoisting device of the utility model comprises the following steps:
s1, according to the actual situation of engineering construction, combining site construction conditions, using BIM software to carry out split and deepened design on the prefabricated staircase, and selecting a prefabricated staircase installation structure and a hoisting mechanism according to the self weight, the length size and the staircase size of the split prefabricated staircase;
s2, simulating a construction process, namely simulating the whole process of hoisting the prefabricated staircase to a structural top plate by a tower crane and transferring the prefabricated staircase by a carrying vehicle, and accurately positioning the truss structure and the truss structure rail in the hoisting process;
s3, assembling the truss structure and the hoisting mechanism on site, and carrying out a loading test;
step S4, accurately positioning and installing the truss structure, the truss structure track and the hoisting mechanism;
step S5, hoisting the prefabricated staircase by using a tower crane, and transferring the prefabricated staircase to a structural top plate between two truss structure rails fixed above the structure at the position between the stairways;
step S6, hoisting and moving the prefabricated staircase by using the prefabricated staircase hoisting device adopting the truss structure;
step S7, adjusting the angle and the height of the prefabricated staircase;
step S8, lowering the prefabricated staircase and installing the prefabricated staircase in place;
and step S9, constructing at the prefabricated staircase joint.
Specifically, in step S1, the prefabricated staircase is disassembled and deeply designed by using the BIM software, and the prefabricated staircase installation structure and the lifting mechanism are selected according to the self weight, the length dimension and the staircase dimension of the disassembled prefabricated staircase, including the following steps: step S11, dividing the original prefabricated staircase into two independent staircases evenly along the longitudinal direction, reserving a 20mm construction joint in the middle, splicing and installing the two staircases during site construction, filling the two staircases by adopting a foamed polystyrene rod, caulking the joints by using building sealant on the surface, designing the positions of lifting points according to corresponding sizes after the prefabricated staircase is split, arranging four lifting points on each split staircase, and completing the pre-embedding of the lifting points during the production of the prefabricated staircase; and S12, selecting the specification and model of the truss structure main beam according to the self weight, length size and staircase size of the split prefabricated staircase, designing the vertical support frame according to the self weight of the split prefabricated staircase and the self weight of the truss structure main beam, wherein the safety coefficient of stress of each component and a welding line of the truss structure is required to be more than or equal to 2, and the design is required to be checked by a steel structure working room after the design is finished. Calculating bending moment according to the dead weight of the prefabricated staircase, thereby determining the type of the truss structure track, and selecting the specification of an electric hoist in the hoisting mechanism according to the dead weight and the hoisting height of the prefabricated staircase; step S13, determining the specification of a hand block according to the self weight and the angle adjusting range of the split prefabricated staircase, selecting the upper end of the prefabricated staircase to use a steel wire rope, and the lower end of the prefabricated staircase to be hoisted in a mode of matching the hand block with the steel wire rope, and designing the lengths of two steel wire ropes according to the minimum distance between a top hook and a hoisting point after the hand block is installed so as to ensure that the prefabricated staircase is kept in a horizontal state during initial hoisting; s14, according to the height and the width of the directional wheel at the bottom of the vertical support frame, a channel steel rail welded at the top of the truss structure rail is selected as a rail for limiting the moving direction of the truss structure; step S15, welding vertical limit baffles at the positions of two ends of a channel steel track on the truss structure track; and S16, welding rail overturn prevention structures at the two ends and the middle part of the truss structure rail along the length direction, and fixedly connecting the truss structure rail with the stair position structure through expansion bolts.
Specifically, in step S2, the construction process simulation specifically includes: according to a field structure plane layout diagram, a roof equipment foundation layout diagram, the actual size in a structural roof reserved hole diagram and the position of a tower crane in the tower crane layout diagram, the coverage range of available hoisting weights of the tower crane, a truss structure rail, a truss structure, a carrying vehicle and other appliances are drawn and formed according to corresponding proportions, the whole process that the prefabricated staircase is hoisted to the structural roof and the carrying vehicle is transferred by the tower crane is simulated, the positions of the truss structure and the rail in the hoisting process are accurately positioned, feasibility deep research analysis is carried out on the whole installation process, and the transfer route of the carrying vehicle is determined conveniently, quickly and feasible.
Specifically, in step S3, the field assembly of the truss structure and the hoisting mechanism includes the following steps: two holes are respectively formed in a rail back plate of the rail anti-overturning structure along the vertical direction and the longitudinal direction; welding and assembling the vertical support frame according to the sequence of the frame body, the transverse support, the horizontal support steel plate, the oblique support and the directional wheel; welding the truss structure main beam and the vertical support frames together, and connecting and fixing the two vertical support frames by using lateral reinforced square steel; sequentially welding and assembling the truss structure track, the track back plate, the overturn-preventing inclined plate, the channel steel track, the limiting baffle plate and the triangular baffle plate inclined strut; measuring and positioning to determine the position of the truss structure track, placing the truss structure track on a staircase position structure, and leveling and adjusting the level of the truss structure track through mortar; fixedly connecting the truss structure track with the stair position structure through expansion bolts and bolt holes; and after the truss structure is assembled, fixing the electric hoist on the main beam of the truss structure. After the electric hoist is installed, the electric hoist needs to be checked and debugged firstly, and the electric hoist comprises a limit switch, a steel wire rope, a lifting hook and the like. Before the construction, a loading test needs to be carried out by simulating a construction environment: and (3) heightening the position (the position connected with the structure in design) of the steel plate welded below the track, so that the truss and the movable track are integrally lifted off the ground. The truss structure is moved to the designed original prefabricated staircase hoisting position, an object with the hoisting quality larger than that of the prefabricated staircase is hoisted, the object is lifted for multiple times and then stands still for 30min, the changes of the truss structure, the truss structure rail and the electric hoist in the whole process are observed, and the truss structure is reinforced and adjusted according to the test condition. Determining a lower back-jacking area and an upper steel plate laying range according to the optimized transfer route of the transfer trolley; when the back-jacking is carried out, the tray buckle frame body is used, the tray buckle frame body is fully spanned in the area below the moving route of the carrier (the frame body needs to be fully distributed below each top plate where the moving route of the carrier passes), and the back-jacking support is provided with three layers. Should lay the waste form above the moving route in the carrier use, increase lifting surface area prevents to crush the floor. According to the on-site installation progress plan requirement, a cement mortar leveling layer is paved at the lap joint position of the prefabricated bench and the main body bench beam in advance, and the elevation of the leveling layer needs to be accurately controlled.
Specifically, in step S4, the step of accurately positioning and installing the truss structure, the truss structure rails, and the hoisting mechanism includes the steps of: positioning the accurate position of the truss structure track in the installation process, and placing the truss structure track; connecting the truss structure track with the structure at the position between the stairs by using expansion bolts; after the completion of the positioning of the structural track in the stairwell, the truss structure is placed into the channel steel track at the top of the truss structure track, the truss structure is moved along the channel steel track to make a round trip, the channel steel track and the truss structure directional wheel are ensured to move between without obstruction, and the vertical limiting baffle can play a limiting effect.
Specifically, in step S5, utilize tower crane handling prefabricated staircase to on transporting the prefabricated staircase to the structure roof between two truss structure tracks of fixing above the stair position structure including the following step: and S51, transferring the prefabricated staircase sections to a structural top plate from a prefabricated staircase material yard on the ground by using a tower crane, and directly placing the prefabricated staircases on a transfer trolley for transfer within the allowable range of the hoisting weight of the tower crane. And S52, paying attention to light lifting and light releasing in the tower crane lifting process, carrying out trial lifting on the prefabricated staircase by the height of about 200mm, moving along a straight line path from the transfer site to the position of the carrier, ascending firstly, then moving to avoid collision, adjusting the speed when the prefabricated staircase is lifted to the specified height in the lifting process, and ensuring that the prefabricated staircase keeps a stable state. And step S53, dragging the transport cart to transport the prefabricated staircase to the space between the fixed truss structure rails above the staircase and on the structure top plate according to the simulated transport moving path of the transport cart. And S54, when a reserved hole exists in the area where the carrier passes through, laying a steel plate with the thickness of 20mm above the reserved hole, and using the plate buckle frame body to jack back below the steel plate. The carrier is not capable of being dragged brute force by paying attention to cooperation of multiple persons in the moving process so as to avoid damage to the carrier. The transport process needs to be paid attention to surrounding buildings, and the collision between the transport vehicle or the prefabricated staircase and other buildings is avoided, so that the irreparable damage is caused.
Specifically, in step S6, the steps of hoisting and moving the prefabricated staircase by using the prefabricated staircase hoisting device adopting the truss structure include: step S61, after the prefabricated staircase is transported to the structural top plate between the two truss structure rails by the carrier, the truss structure is moved to the upper part of the prefabricated staircase along the truss structure rails; step S62, checking the hook condition of the hoisting mechanism before hoisting, and checking the state of the clamping ring and the hoisting rope after the hoisting rope is stressed to be in a tight state; step S63, installing a manual hoist on a lifting hook matched with the electric hoist, fixing a prefabricated staircase lifting point by using a lifting appliance, matching with a designed steel wire rope, and horizontally and slowly lifting the prefabricated staircase; step S64, when the prefabricated staircase does not shake any more, the truss structure is pushed to the corresponding mounting position of the upper empty staircase section of the prefabricated staircase, the directional wheel is braked and locked, and the truss fixed pulley is prevented from jumping out of the I-shaped steel rail due to overlarge acceleration in the hoisting process of the prefabricated staircase; and step S65, fixing the truss structure and the truss structure rail by using a round steel snap ring.
Specifically, in step S7, the step of adjusting the angle and the height of the prefabricated staircase includes the following steps: after the prefabricated staircase is hoisted to the upper side of the staircase by the hoisting mechanism, the hand-operated hoist is extended to enable the lower end of the prefabricated staircase to fall, the angle formed by the prefabricated staircase and the horizontal plane is gradually increased, the length of the prefabricated staircase in the horizontal direction is gradually reduced, the length of the prefabricated staircase in the vertical direction is gradually increased, and when the length of the prefabricated staircase in the horizontal direction is smaller than the horizontal distance between the staircase beams at the two ends when the prefabricated staircase is installed, the prefabricated staircase begins to be placed downwards for installation, as shown in fig. 7-8.
Specifically, in step S8, care should be taken to maintain a constant falling speed during the installation of the prefabricated staircase below, so as to avoid multiple stop and start during the falling process. And (3) before the prefabricated staircase is in place, checking the flatness of a cement mortar leveling layer on the staircase beam by using a level gauge. When the stair plates are in place, the stair plates are vertically lifted downwards from the top, a pause is slightly made at the position which is about 30cm above an operation layer, constructors hold the stair plates to adjust the direction, the side lines of the stair plates are aligned with the placing position lines on the stair beams, the stair plates are stopped stably and slowly when the stair plates are put down, and quick and violent placing is strictly forbidden so as to avoid the phenomenon that the plate faces are cracked due to overlarge impact force. Because the stair split hoist and mount, pay attention to the relative position of two parts prefabricated stair boards during the installation, both avoid mutual destruction, guarantee again to connect completely.
Specifically, in step S9, the construction of the prefabricated staircase connection includes the following steps: after the prefabricated staircase is hoisted, the abutted seams between the prefabricated staircase and the staircase beams are filled by using the PE rods, and the building sealant is used above the PE rods for plugging. Holes are reserved in pin keys at the joints of the prefabricated stairways and the pin keys, and C40-grade CGM grouting material is used for grouting after the prefabricated stairways are installed. During construction, firstly, according to the use instruction of grouting materials provided by a supplier, a specially-assigned person is arranged to quantitatively take materials and quantitatively add water for stirring, and the stirred mixture is injected into a reserved round hole of a stair section within 30 min. The maintenance should be enhanced within 4 hours after the filling operation of the grouting material, and harmful effects such as vibration, impact, etc. should not be applied. After the two stair sections are spliced and installed in field construction, joints between the prefabricated stairs are filled with foamed polystyrene rods at connecting positions between the prefabricated stair sections, and building sealant is used for caulking the surfaces of the stair sections.
The prefabricated staircase is hoisted to the roof by the tower crane, and the prefabricated staircase is moved to the position of the staircase to be installed by the carrier; moving the profile steel truss structure to the position above the prefabricated staircase along the truss structure rail, then hoisting the prefabricated staircase by using an electric hoist fixed on the truss structure, moving the truss structure, and transferring the prefabricated staircase to the position right above the installation position; adopt hand hoist to adjust the angle of prefabricated stair and horizontal plane, adjust electric block and make prefabricated stair transfer gradually until satisfying the installation requirement, wholly adopt from the hoist and mount order up down, finally realized the safe high quality installation of prefabricated stair.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides an adopt truss structure's prefabricated stair hoist device which characterized in that: adopt truss structure's assembled prefabricated stair hoist device includes prefabricated stair mounting structure and lifts by crane the mechanism, wherein, prefabricated stair mounting structure includes:
the truss structure rails (4) are arranged in parallel, and a plurality of structure connecting positions are arranged at the bottom of each truss structure rail (4) at intervals; and
the truss structure comprises truss structure main beams (1) and vertical support frames (2), the two vertical support frames (2) are symmetrically arranged in the two truss structure tracks (4) and are in sliding connection with the truss structure tracks (4), the truss structure main beams (1) are arranged at the tops of the vertical support frames (2), two ends of each truss structure main beam (1) are fixedly connected with the tops of the two vertical support frames (2), and the truss structure main beams (1) are perpendicular to the truss structure tracks (4);
and the hoisting mechanism is fixedly arranged in the middle of the bottom of the truss structure main beam (1), the hoisting mechanism comprises an electric hoist (81), and the electric hoist (81) is fixedly connected with the bottom of the truss structure main beam (1).
2. The prefabricated staircase hoisting device adopting the truss structure as claimed in claim 1, wherein: the top of truss structure track (4) is provided with slotted steel track (43), the top of truss structure track (4) just is located two tip of channel-section steel track (43) are provided with vertical limit baffle (42), vertical limit baffle (42) through triangle baffle bracing (41) with truss structure track (4) fixed connection, and two the medial surface of vertical limit baffle (42) with two tip looks butt of channel-section steel track (43).
3. The prefabricated staircase hoisting device adopting the truss structure as claimed in claim 1, wherein: truss structure track (4) all are provided with the track structure of preventing toppling along length direction both ends and middle part position, the track structure of preventing toppling includes track backplate (45) and anti-overturning swash plate (46), track backplate (45) are the rectangle steel sheet, track backplate (45) level sets up the both sides of truss structure track (4) bottom, anti-overturning swash plate (46) vertical setting, anti-overturning swash plate (46) are the right trapezoid structure, the right angle limit of the vertical direction of anti-overturning swash plate (46) with the side fixed connection of truss structure track (4), the right angle limit of the horizontal direction of anti-overturning swash plate (46) with the upper surface fixed connection of track backplate (45).
4. The prefabricated staircase hoisting device adopting the truss structure as claimed in claim 3, wherein: truss structure track (4) are the I shape structure, prevent toppling the top and the bottom of swash plate (46) respectively with the I shape the inboard fixed connection in top and the inboard bottom of truss structure track (4), just lie in on track backplate (45) and prevent toppling both sides of swash plate (46) and be provided with bolt hole (47) symmetrically, truss structure track (4) through expansion bolts (6) with bolt hole (47) and stair position structure (5) fixed connection.
5. The prefabricated staircase hoisting device adopting the truss structure as claimed in claim 1, wherein: the hand-operated hoist (82) is installed on the lifting hook of the electric hoist (81), and the hand-operated hoist (82) is connected with the prefabricated staircase (7) through a steel wire rope (83).
6. The prefabricated staircase hoisting device adopting the truss structure as claimed in claim 2, wherein: the bottom of the vertical support frame (2) is provided with an orientation wheel (25), the orientation wheel (25) is arranged in the channel steel track (43) and can slide in the channel steel track (43) in an oriented mode.
7. The prefabricated staircase hoisting device adopting the truss structure as claimed in claim 2, wherein: two through two sets of side direction reinforcement square steel (3) fixed connection between vertical support frame (2), every group side direction reinforcement square steel (3) are the square steel pipe that two slopes set up.
8. The prefabricated staircase hoisting device adopting the truss structure as claimed in claim 1, wherein: every vertical bracing frame (2) include horizontal support steel sheet (21), support body (22), horizontal support (23) and diagonal bracing (24), wherein support body (22) are the triangle-shaped structure, the interval is provided with a plurality of horizontal supports (23) between the vertical both sides frame of support body (22), horizontal support steel sheet (21) level sets up the top of support body (22), two the both ends of diagonal bracing (24) respectively with support body (22) with horizontal support steel sheet (21) fixed connection to constitute the triangle-shaped structure, truss structure girder (1) with the top welded connection of horizontal support steel sheet (21).
CN202022814341.6U 2020-11-30 2020-11-30 Adopt truss structure's prefabricated stair hoist device of assembled Active CN213707530U (en)

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