CN113526338B - Prefabricated box girder hoisting device and hoisting construction method for hoisting box girder - Google Patents
Prefabricated box girder hoisting device and hoisting construction method for hoisting box girder Download PDFInfo
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- CN113526338B CN113526338B CN202110786690.8A CN202110786690A CN113526338B CN 113526338 B CN113526338 B CN 113526338B CN 202110786690 A CN202110786690 A CN 202110786690A CN 113526338 B CN113526338 B CN 113526338B
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- 230000005540 biological transmission Effects 0.000 claims description 29
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
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- 238000005299 abrasion Methods 0.000 description 1
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- 239000011178 precast concrete Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
- B66C1/425—Gripping members engaging only the external or internal surfaces of the articles motor actuated
- B66C1/427—Gripping members engaging only the external or internal surfaces of the articles motor actuated by hydraulic or pneumatic motors
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The utility model belongs to the technical field of the technique of overpass roof beam construction and specifically relates to a prefabricated box girder hoist device and be used for hoist and mount construction method of this case roof beam is related to, it is including the seat that hangs that is used for hanging prefabricated box girder body, it is provided with two travelling arms to hang the removal of seat bottom, it is provided with and is used for driving two simultaneously to hang the seat the removal subassembly that the travelling arm removed, two the one end that the travelling arm deviates from each other is provided with the linking arm, the linking arm deviates from the articulated support arm that is provided with of one end of travelling arm, the linking arm is provided with and is used for driving support arm wobbling swing subassembly, two the support arm press from both sides respectively in the bottom both sides of prefabricated box girder body, the travelling arm is provided with and is used for compressing tightly the piece that compresses tightly prefabricated box girder body. This application has the effect that reduces the hoist and mount in-process and damage the precast box roof beam.
Description
Technical Field
The application relates to the technical field of viaduct beam construction, in particular to a prefabricated box beam hoisting device and a hoisting construction method for hoisting the box beam.
Background
With the rapid development of highway construction technology, how to make the construction of the highway rapid, effective and quality and quantity guaranteed becomes a new direction for the construction of the viaduct engineering. As is well known, the precast concrete box girder is widely used in the construction of viaduct girders, but because of the large volume of precast box girder, at least two heavy hoisting equipments are usually used in the erection process.
At present, a hoisting device of a prefabricated box girder generally comprises at least two hoisting trucks and at least two steel wire ropes, when the prefabricated box girder needs to be hoisted, a worker firstly moves the at least two hoisting trucks to two ends of the prefabricated box girder respectively, then the worker binds and sleeves one ends of the at least two steel wire ropes at two ends of the prefabricated box girder respectively, the other ends of the at least two steel wire ropes are hung on lifting hooks of the at least two hoisting trucks respectively, and finally the at least two hoisting trucks are started simultaneously to carry and erect the prefabricated box girder.
In view of the above-mentioned related technologies, the inventor thinks that the prefabricated box girder inevitably shakes during the hoisting process, the steel wire rope and the prefabricated box girder are mutually extruded, slid and dislocated, the contact area between the steel wire rope and the prefabricated box girder is small, the pressure is too concentrated, and the prefabricated box girder is easily damaged or the strands of the steel wire rope are broken by abrasion, thereby bringing about potential safety hazards.
Disclosure of Invention
In order to reduce damage to the prefabricated box girder in the hoisting process, the application provides a prefabricated box girder hoisting device and a hoisting construction method for hoisting the box girder.
First aspect, the application provides a prefabricated box girder hoist device adopts following technical scheme:
a prefabricated box girder hoisting device comprises a hoisting base used for hoisting a prefabricated box girder body, wherein the bottom of the hoisting base is movably provided with two moving arms, the hoisting base is provided with a moving component used for driving the two moving arms to move simultaneously, one ends of the two moving arms, which are far away from each other, are provided with connecting arms, one ends of the connecting arms, which are far away from the moving arms, are hinged with supporting arms, the connecting arms are provided with swinging components used for driving the supporting arms to swing, the two supporting arms are respectively clamped on two sides of the bottom of the prefabricated box girder body, and the moving arms are provided with pressing pieces used for pressing the prefabricated box girder body;
the supporting arm comprises a swinging sub-arm and a supporting sub-arm, one end of the swinging sub-arm is hinged to the connecting arm, the supporting sub-arm is arranged at one end of the swinging sub-arm, which is far away from the hinged part, the supporting sub-arm is abutted against the bottom of the precast box girder body, and an adjusting mechanism for adjusting the position of the precast box girder body is arranged on the supporting sub-arm;
the adjusting mechanism comprises at least two groups of adjusting wheels, the supporting sub-arm is correspondingly provided with at least two adjusting grooves, the at least two groups of adjusting wheels are respectively and rotatably arranged in the at least two adjusting grooves, the at least two groups of adjusting wheels are respectively abutted against the bottom of the precast box girder body, and the supporting sub-arm is provided with a transmission assembly for simultaneously driving the at least two groups of adjusting wheels to rotate;
the transmission assembly comprises a transmission motor, a driving gear, a driven gear and a transmission chain, a rotating shaft is arranged in the adjusting groove, the adjusting wheel sleeve is arranged at the rotating shaft, one end of the rotating shaft penetrates through the adjusting groove and extends to the outside of the supporting sub-arm side wall, the driven gear sleeve is arranged at one end of the rotating shaft, the transmission motor is arranged at one side of the supporting sub-arm, the driving gear sleeve is arranged at an output shaft of the transmission motor, and the driving gear passes through the transmission chain and the driven gear in a transmission mode.
By adopting the technical scheme, when the prefabricated box girder body needs to be hung, a worker drives the two moving arms to move towards the direction away from each other through the moving assembly, then drives the supporting arms to swing towards the direction close to the prefabricated box girder body through the swinging assembly, the two supporting arms are clamped at the bottom of the prefabricated box girder body at the moment, then the prefabricated box girder body is pressed tightly through the pressing piece, when the hanging seat is lifted, the prefabricated box girder body is hung under the combined action of the two supporting arms, the damage to the prefabricated box girder in the hoisting process is reduced, when the supporting arms swing towards the direction close to the prefabricated box girder body, the supporting sub-arms are abutted against the bottom of the prefabricated box girder body at the moment, and when the prefabricated box girder body is hung between two piers and the position of the prefabricated box girder body needs to be adjusted at the same time, the worker can drive the prefabricated box girder body to move and adjust through the adjusting mechanism, at the moment, the two ends of the prefabricated box girder body are respectively right opposite to the top middle positions of the two piers, and therefore the stability of the prefabricated box girder body hung on the two piers is improved.
Optionally, the moving assembly includes a moving motor, a lead screw and two moving blocks, a moving groove is formed in the bottom of the hanging seat, the two moving blocks slide in the moving groove respectively, the bottoms of the two moving blocks penetrate through the moving groove and extend out of the bottom of the hanging seat, the bottoms of the two moving blocks are connected with the two moving arms respectively, the lead screw is rotatably arranged in the moving groove, the lead screw is provided with two sections of threads in opposite directions, the lead screw penetrates through the two moving blocks and is in threaded connection with the two moving blocks, the moving motor is arranged on one side of the hanging seat, and an output shaft of the moving motor penetrates through the hanging seat and is connected with the lead screw.
Through adopting above-mentioned technical scheme, when the staff started the travelling motor, the output shaft drive lead screw of travelling motor rotated, and under the effect of opposite screw of both ends direction, the lead screw drove two travelling arms through two movable blocks and moves towards the direction of keeping away from each other, and the travelling arm is adapted to the width of prefabricated box girder body this moment, and then is favorable to improving the application scope of travelling arm.
Optionally, the swing subassembly includes first pneumatic cylinder and swinging arms, first pneumatic cylinder set up in one side of linking arm, the swinging arms set up in one side of the sub-arm of swing, the one end of swinging arms with the lateral wall of the sub-arm of swing is articulated, the other end of swinging arms with the output of first pneumatic cylinder is articulated.
Through adopting above-mentioned technical scheme, when the staff started first pneumatic cylinder, the output of first pneumatic cylinder drove the swinging arms swing, and the swinging arms drives the swing sub-arm and swings towards the direction that is close to prefabricated box girder body, and the swing sub-arm drives and supports the sub-arm and swing towards the direction that is close to prefabricated box girder body, supports the sub-arm and supports in the bottom of prefabricated box girder body this moment, and then is favorable to improving the stability that the support arm supported prefabricated box girder body.
Optionally, the pressing piece is a second hydraulic cylinder, the second hydraulic cylinder is arranged on one side of the moving arm, a pressing plate is arranged at the output end of the second hydraulic cylinder, and the pressing plate is pressed on the top of the precast box girder body.
Through adopting above-mentioned technical scheme, when the staff started the second pneumatic cylinder, the output of second pneumatic cylinder drove the clamp plate and pushed down towards the direction that is close to precast box girder body, and the clamp plate compresses tightly in the top of precast box girder body this moment, under the mating reaction of clamp plate, and then is favorable to further improving precast box girder body and is fixed in stability on the support sub-arm.
Optionally, the top of the hanging seat is provided with a hanging lug ring.
Through adopting above-mentioned technical scheme, under the effect of lug ring, be favorable to improving the convenience that the staff hung the hanging seat.
Optionally, the hanging seat is provided with a limiting block based on the moving groove.
Through adopting above-mentioned technical scheme, under the effect of stopper, be favorable to reducing two movable arms and bump when moving towards the direction that is close to each other.
In a second aspect, the present application provides a hoisting construction method for hoisting a box girder, which includes the following steps:
s1: firstly, preparing at least two 260T hoisting cars and at least two hoisting devices, then respectively moving the at least two 260T hoisting cars to two pier positions, and simultaneously hoisting the hoisting seat through the hoisting ear rings;
s2: then, the moving arm is driven to move through the moving assembly, so that the moving arm is adaptive to the width of the prefabricated box girder body;
s3: then the supporting arm is driven by the swinging component to swing towards the direction close to the precast box girder body, and the adjusting wheel is abutted against the bottom of the precast box girder body;
s4: then, a top plate of the prefabricated box girder body is pressed tightly through a pressing piece, and the prefabricated box girder body is fixed below the hanging seat;
s5: then hanging the prefabricated box girder body between the two piers, and then adjusting the position of the prefabricated box girder body through an adjusting mechanism, wherein the two ends of the prefabricated box girder body are respectively erected at the middle positions of the tops of the two piers;
s6: and finally, the supporting arm is driven by the swing assembly to swing towards the direction far away from the prefabricated box girder body, and the supporting sub-arm is separated from the prefabricated box girder body to complete hoisting.
To sum up, the application comprises the following beneficial technical effects:
when the prefabricated box girder body is hung to needs, the staff drives the travelling arm through the removal subassembly and removes towards the direction of keeping away from the seat of hanging, then drives the support arm through the swing subassembly again and swings towards the direction of being close to the prefabricated box girder body, two support arms clamp tightly in the bottom both sides of prefabricated box girder body this moment, rethread compressing tightly spare compresses tightly the prefabricated box girder body after that, and when the seat of hanging hangs, under the combined action of two support arms, the prefabricated box girder body is hung, and then be favorable to reducing the hoist and mount in-process and damage prefabricated box girder.
Drawings
Fig. 1 is an overall structure schematic diagram of the prefabricated box girder hoisting device of the application.
Fig. 2 is a schematic overall structure diagram of the hoisting device of the present application.
Fig. 3 is an enlarged view of a portion a of fig. 2.
Description of reference numerals: 1. a bridge pier; 12. prefabricating a box girder body; 2. a hanging seat; 21. a moving groove; 22. a lug ring; 3. a moving arm; 31. a connecting arm; 4. a support arm; 41. a swing sub-arm; 42. a support sub-arm; 421. an adjustment groove; 5. a moving motor; 51. a screw rod; 511. a thread; 52. a moving block; 53. a limiting block; 6. a first hydraulic cylinder; 61. a swing lever; 62. a first cylinder; 63. a first piston rod; 7. an adjustment wheel; 71. a rotating shaft; 8. a drive motor; 81. a driving gear; 82. a driven gear; 83. a drive chain; 9. a second hydraulic cylinder; 91. a second cylinder; 92. a second piston rod; 93. and (7) pressing a plate.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
Example (b):
referring to fig. 1, a prefabricated box girder hoisting device comprises a hoisting seat 2 for hoisting a prefabricated box girder body 12 on two piers 1. The hanging seat 2 is cuboid, the bottom of the hanging seat 2 is moved to be provided with two moving arms 3, the two moving arms 3 are symmetrically arranged along the vertical central axis direction of the hanging seat 2, and the hanging seat 2 is provided with a moving assembly which is used for driving the two moving arms 3 to move towards the direction close to or away from each other. One side that two moving arm 3 deviate from each other is fixed with linking arm 31 respectively, and linking arm 31 and moving arm 3 enclose to close and form the contained angle and be the obtuse angle setting. The one end that two linking arms 31 deviate from moving arm 3 articulates respectively has support arm 4, and two support arms 4 are used for the centre gripping to support the bottom both sides of precast box girder body 12 simultaneously, and are provided with the swing subassembly that is used for driving support arm 4 towards the direction wobbling that is close to or keeps away from precast box girder body 12 on two linking arms 31 respectively. The two moving arms 3 are respectively provided with a pressing piece for pressing the precast box girder body 12.
Specifically, referring to fig. 2, the moving assembly includes a moving motor 5, a lead screw 51 and a moving block 52, a moving groove 21 is formed at the bottom of the hanging seat 2, and the moving groove 21 is formed along the length direction of the hanging seat 2. Two moving blocks 52 are correspondingly arranged, the two moving blocks 52 move in the moving grooves 21 respectively, the bottoms of the two moving blocks 52 penetrate through the moving grooves 21 and extend out of the bottom of the hanging seat 2, and the bottoms of the two moving blocks 52 are correspondingly fixedly connected with the two moving arms 3 respectively. The screw rod 51 is horizontally arranged, and the screw rod 51 rotates in the moving groove 21. Two sections of threads 511 in opposite directions are fixed on the screw rod 51, and the two sections of threads 511 are symmetrically arranged along the center of the screw rod 51. The lead screw 51 penetrates through the two moving blocks 52 respectively and is in threaded connection with the two moving blocks 52, and the two moving blocks 52 are located on the two sections of threads 511 respectively. The movable motor 5 is fixed on one side of the hanging seat 2, an output shaft of the movable motor 5 penetrates through the hanging seat 2 and extends into the hanging seat 2, and the output shaft of the movable motor 5 is coaxially and fixedly connected with one end of the screw rod 51.
When a worker starts the moving motor 5, the output shaft of the moving motor 5 drives the lead screw 51 to rotate, the lead screw 51 drives the two moving blocks 52 to move towards the direction away from each other through the two sections of threads 511, and the two moving blocks 52 drive the moving arms 3 to move towards the direction away from each other.
It should be noted that, referring to fig. 2, in order to prevent the two moving blocks 52 from colliding when moving toward each other, the hanger 2 is fixed with a stopper 53 in the moving groove 21. The limiting block 53 is located in the middle of the moving groove 21, and the screw rod 51 penetrates through the limiting block 53 and is rotatably connected with the limiting block 53.
Specifically, see fig. 2, the swing assembly includes a first hydraulic cylinder 6 and a swing rod 61, the first hydraulic cylinder 6 is fixed on the outer side of the connecting arm 31, the first hydraulic cylinder 6 includes a first cylinder 62 and a first piston rod 63, and the first hydraulic cylinder 6 is hinged to the outer side of the connecting arm 31. The swing rod 61 is disposed outside the support arm 4, one end of the swing rod 61 is hinged to the outside of the support arm 4, and the other end of the swing rod 61 is hinged to the first piston rod 63.
When the worker starts the first hydraulic cylinder 6, the first piston rod 63 drives the swing rod 61 to swing in the direction close to the precast box girder body 12, and the swing rod 61 drives the supporting arm 4 to swing in the direction close to the precast box girder body 12.
Referring to fig. 2, in order to improve the stability of the supporting arm 4 for clamping and supporting the precast box girder body 12, the supporting arm 4 includes a swing sub-arm 41 and a supporting sub-arm 42. One end of the swing sub-arm 41 is hinged to the end of the connecting arm 31 facing away from the moving arm 3, and one end of the swing lever 61 is hinged to the outside of the swing sub-arm 41. The supporting sub-arm 42 is disposed at the other end of the swing sub-arm 41, and the supporting sub-arm 42 is fixedly connected to the other end of the swing sub-arm 41. The angle formed by the enclosing of the swing sub-arm 41 and the support sub-arm 42 is adapted to the two sides of the bottom of the precast box girder body 12, and the support sub-arm 42 is supported on the two sides of the bottom of the precast box girder body 12.
Referring to fig. 2, in order to facilitate adjustment of the two ends of the bottom of the precast box girder body 12 to be erected at the middle positions of the tops of the two piers 1, the support sub-arm 42 is provided with an adjusting mechanism. The adjusting mechanism comprises an adjusting wheel 7, an adjusting groove 421 is formed in one side, supported at the bottom of the precast box girder body 12, of the supporting sub-arm 42, and the adjusting groove 421 is formed in the thickness direction of the supporting sub-arm 42. Two adjusting grooves 421 are provided, and the two adjusting grooves 421 are respectively distributed in a linear array along the width direction of the supporting sub-arm 42.
Two sets of adjusting wheels 7 are provided, and the two sets of adjusting wheels 7 respectively rotate in the two adjusting grooves 421. The number of each group of adjusting wheels 7 is two, the two adjusting wheels 7 are respectively arranged in a linear array along the length direction of the adjusting groove 421, and the tops of the two adjusting wheels 7 respectively penetrate through the adjusting groove 421 and extend out of the side wall of the supporting sub-arm 42.
Referring to fig. 2 and 3, in order to facilitate the rotation of the two sets of adjustment wheels 7 at the same time, a transmission assembly is provided on the side of the support sub-arm 42 facing the swing sub-arm 41. The transmission assembly includes a transmission motor 8, a driving gear 81, a driven gear 82, and a transmission chain 83. The support sub-arm 42 rotates a rotating shaft 71 based on the adjusting groove 421, and the two adjusting wheels 7 are respectively and fixedly sleeved on the rotating shaft 71. One end of the rotating shaft 71 facing the swing sub-arm 41 penetrates through the adjusting groove 421 and extends out of the side wall of the support sub-arm 42, and the driven gear 82 is fixedly sleeved on one end of the rotating shaft 71 facing the swing sub-arm 41. The transmission motor 8 is fixed on the side wall of the support sub-arm 42, the driving gear 81 is fixedly sleeved on the output end of the transmission motor 8, and the driving gear 81 is in meshing transmission with the driven gear 82 through the transmission chain 83.
When the worker starts the transmission motor 8, the output shaft of the transmission motor 8 drives the driving gear 81 to rotate, the driving gear 81 drives the driven gear 82 to rotate through the transmission chain 83, the driven gear 82 drives the adjusting wheel 7 to rotate through the rotating shaft 71, the adjusting wheel 7 drives the prefabricated box girder body 12 to move, and at the moment, two ends of the bottom of the prefabricated box girder body 12 are respectively aligned to the middle positions of the tops of the two piers 1.
Specifically, referring to fig. 2, the pressing member includes a second hydraulic cylinder 9, and the second hydraulic cylinder 9 is disposed on a side of the moving arm 3 away from the hanging seat 2. The second hydraulic cylinder 9 includes a second cylinder 91 and a second piston rod 92, and the second cylinder 91 is fixedly connected to the moving arm 3. The second piston rod 92 is slidably connected to the second cylinder 91, and a pressing plate 93 is coaxially fixed to one end of the second piston rod 92 away from the second cylinder 91, and the pressing plate 93 presses against the top of the precast box girder body 12.
It should be noted that, referring to fig. 2, a lifting lug ring 22 is fixed at the middle position of the top of the lifting base 2, and the lifting lug ring 22 is used for hanging a hook of a crane.
The application provides a hoisting construction method for hoisting a box girder, which comprises the following steps:
s1: the worker first prepares two 260T cranes and two lifting devices. Then, the worker respectively moves the two 260T lifting trucks to one side of the bottoms of the two piers 1, and simultaneously the worker respectively lifts the two lifting seats 2 through the lifting lug rings 22 by the other two 260T lifting trucks and simultaneously swings close to the upper part of the precast box girder body 12;
s2: then, the worker starts the movable motor 5 again, an output shaft of the movable motor 5 drives the lead screw 51 to rotate, the lead screw 51 simultaneously drives the two movable blocks 52 to move towards the directions away from each other, the two movable blocks 52 respectively drive the movable arms 3 to move towards the directions away from each other, and at the moment, the two movable arms 3 adapt to the width of the precast box girder body 12;
s3: then, the worker starts the first hydraulic cylinder 6 again, the first hydraulic cylinder 6 drives the swing sub-arms 41 to swing towards the direction close to the precast box girder body 12 through the swing rods 61, the swing sub-arms 41 drive the support sub-arms 42 to swing towards the direction close to the precast box girder body 12, at the moment, the two swing sub-arms 41 clamp the precast box girder body 12, and the adjusting wheels 7 on the two support sub-arms 42 abut against the two sides of the bottom of the precast box girder body 12;
s4: then, the worker starts the second hydraulic cylinder 9 again, the second piston rod 92 drives the pressing plate 93 to press downwards towards the direction close to the top of the precast box girder body 12, at the moment, the pressing plate 93 presses the top of the precast box girder body 12, and the precast box girder body 12 is clamped and fixed in the hoisting device;
s5: then, the worker starts two 260T hoisting cranes simultaneously, the two 260T hoisting cranes finally hoist the prefabricated box girder body 12 through the hoisting seats 2 simultaneously, meanwhile, the prefabricated box girder body 12 is hoisted to the middle position of the two piers 1, then the worker starts the transmission motor 8 according to the field condition, the transmission motor 8 finally drives the adjusting wheel 7 to rotate, the adjusting wheel 7 drives the prefabricated box girder body 12 to perform position movement adjustment, and at the moment, the two ends of the bottom of the prefabricated box girder body 12 are respectively erected at the middle position of the tops of the two piers 1;
s6: and finally, the worker starts the first hydraulic cylinder 6 again, the first hydraulic cylinder 6 drives the swing sub-arm 41 to swing towards the direction far away from the precast box girder body 12 through the swing rod 61, the swing sub-arm 41 drives the support sub-arm 42 to swing towards the direction far away from the precast box girder body 12, and at the moment, the support sub-arm 42 is separated from the precast box girder body 12 and the hoisting is completed.
To sum up, hang precast box girder body 12 through hoist device, and then be favorable to reducing the hoist and mount in-process and damage precast box girder.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. A prefabricated box girder hoisting device comprises a hoisting seat (2) used for hoisting a prefabricated box girder body (12), wherein two moving arms (3) are movably arranged at the bottom of the hoisting seat (2), the hoisting seat (2) is provided with a moving assembly used for simultaneously driving the two moving arms (3) to move, one ends of the two moving arms (3) which are deviated from each other are provided with connecting arms (31), one ends of the connecting arms (31) which are deviated from the moving arms (3) are hinged with supporting arms (4), the connecting arms (31) are provided with swinging assemblies used for driving the supporting arms (4) to swing, the two supporting arms (4) are respectively clamped on two sides of the bottom of the prefabricated box girder body (12), and the moving arms (3) are provided with pressing pieces used for pressing the prefabricated box girder body (12);
the supporting arm (4) comprises a swinging sub-arm (41) and a supporting sub-arm (42), one end of the swinging sub-arm (41) is hinged to the connecting arm (31), the supporting sub-arm (42) is arranged at one end, away from the hinged part, of the swinging sub-arm (41), the supporting sub-arm (42) abuts against the bottom of the precast box girder body (12), and an adjusting mechanism used for adjusting the position of the precast box girder body (12) is arranged on the supporting sub-arm (42);
the adjusting mechanism comprises at least two groups of adjusting wheels (7), at least two adjusting grooves (421) are correspondingly formed in the supporting sub-arm (42), the at least two groups of adjusting wheels (7) are respectively and rotatably arranged in the at least two adjusting grooves (421), the at least two groups of adjusting wheels (7) are respectively abutted against the bottom of the prefabricated box girder body (12), and the supporting sub-arm (42) is provided with a transmission assembly for simultaneously driving the at least two groups of adjusting wheels (7) to rotate;
the transmission assembly comprises a transmission motor (8), a driving gear (81), a driven gear (82) and a transmission chain (83), a rotating shaft (71) is arranged in an adjusting groove (421), the adjusting wheel (7) is sleeved on the rotating shaft (71), one end of the rotating shaft (71) penetrates through the adjusting groove (421) and extends to the outside of the side wall of the supporting sub-arm (42), the driven gear (82) is sleeved on one end of the rotating shaft (71), the transmission motor (8) is arranged on one side of the supporting sub-arm (42), the driving gear (81) is sleeved on the output shaft of the transmission motor (8), and the driving gear (81) is connected with the transmission chain (83) in a transmission mode.
2. The precast box girder hoisting device according to claim 1, characterized in that: the moving assembly comprises a moving motor (5), a lead screw (51) and two moving blocks (52), a moving groove (21) is formed in the bottom of the hanging seat (2), the two moving blocks (52) slide in the moving groove (21) respectively, the bottoms of the two moving blocks (52) penetrate through the moving groove (21) and extend out of the bottom of the hanging seat (2), the bottoms of the two moving blocks (52) are connected with the two moving arms (3) respectively, the lead screw (51) is rotatably arranged in the moving groove (21), the lead screw (51) is provided with two sections of threads (511) with opposite directions, the lead screw (51) penetrates through the two moving blocks (52) and is in threaded connection with the two moving blocks (52), the moving motor (5) is arranged on one side of the hanging seat (2), and an output shaft of the moving motor (5) penetrates through the hanging seat (2), and is connected with the screw rod (51).
3. The precast box girder hoisting device according to claim 1, characterized in that: the swing subassembly includes first pneumatic cylinder (6) and swinging arms (61), first pneumatic cylinder (6) set up in one side of linking arm (31), swinging arms (61) set up in one side of swing sub-arm (41), the one end of swinging arms (61) with the lateral wall of swing sub-arm (41) is articulated, the other end of swinging arms (61) with the output of first pneumatic cylinder (6) is articulated.
4. The precast box girder hoisting device according to claim 1, characterized in that: the pressing piece is a second hydraulic cylinder (9), the second hydraulic cylinder (9) is arranged on one side of the moving arm (3), a pressing plate (93) is arranged at the output end of the second hydraulic cylinder (9), and the pressing plate (93) is pressed on the top of the prefabricated box girder body (12).
5. The precast box girder hoisting device according to claim 1, characterized in that: the top of the hanging seat (2) is provided with a hanging ear ring (22).
6. The precast box girder hoisting device according to claim 2, characterized in that: the hanging seat (2) is provided with a limiting block (53) based on the moving groove (21).
7. A hoisting construction method for hoisting a box girder is characterized in that the prefabricated box girder hoisting device based on any one of claims 1 to 6 comprises the following steps:
s1: firstly, preparing at least two 260T hoisting trolleys and at least two hoisting devices, then respectively moving the at least two 260T hoisting trolleys to the positions of two piers (1), and simultaneously respectively hoisting the hoisting seat (2) through the hoisting ear rings (22);
s2: then, the moving arm (3) is driven to move through the moving assembly, so that the moving arm (3) is adaptive to the width of the precast box girder body (12);
s3: then the swinging component drives the supporting arm (4) to swing towards the direction close to the precast box girder body (12), and the adjusting wheel (7) is abutted against the bottom of the precast box girder body (12);
s4: then, a top plate of the precast box girder body (12) is pressed tightly through a compression part, and at the moment, the precast box girder body (12) is fixed below the hanging seat (2);
s5: then hanging the prefabricated box girder body (12) between the two piers (1), and then adjusting the position of the prefabricated box girder body (12) through an adjusting mechanism, wherein the two ends of the prefabricated box girder body (12) are erected at the middle positions of the tops of the two piers (1) respectively;
s6: and finally, the support arm (4) is driven by the swing component to swing towards the direction far away from the precast box girder body (12), and at the moment, the support sub-arm (42) is separated from the precast box girder body (12), so that the hoisting is completed.
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Denomination of invention: A prefabricated box girder lifting device and a lifting construction method for lifting the box girder Granted publication date: 20220607 Pledgee: China Co. truction Bank Corp Jiangmen branch Pledgor: GUANGDONG JIANBANG XINGYE GROUP CO.,LTD. Registration number: Y2024980013806 |
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