CN219621618U

CN219621618U - Integral pushing device for steel box girder

Info

Publication number: CN219621618U
Application number: CN202320793591.7U
Authority: CN
Inventors: 曹洋
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-04-12
Filing date: 2023-04-12
Publication date: 2023-09-01
Anticipated expiration: 2033-04-12

Abstract

The utility model discloses an integral pushing device for a steel box girder, which is arranged at the top of an elevation adjusting mechanism, wherein the elevation adjusting mechanism comprises a box body, a plurality of screws are penetrated through holes at the bottom of the box body, support plates are fixedly connected to the bottom ends of the screws, the screws are in sliding connection with the box body in the vertical direction, nuts are sleeved on the outer wall of the screws in the box body in a matched manner, a sleeve is fixedly connected to the outer wall of the nuts, the sleeve is in rotary connection with the inner wall of the box body, and a motor is fixedly connected to the outer wall of the box body; when the pushing device is used, after the pushing device is arranged on the support platform, the motor is started to drive each sleeve to rotate, the screw rod can downwards extend out of the box body by utilizing the cooperation of the nut and the screw rod until the pushing mechanism is attached to the bottom surface of the beam body, then the beam body can be pushed by utilizing the pushing mechanism, the uniform stress of each pushing mechanism can be ensured, a cushion block is not needed, and the pushing device is more convenient to use.

Description

Integral pushing device for steel box girder

Technical Field

The utility model relates to the field of bridge construction, in particular to an integral pushing device for a steel box girder.

Background

The steel box girder is also called a steel plate box girder, and is a common structural form of a large-span bridge. The construction method is characterized in that the construction method is that the girder body is assembled at the bridge head section by section, and is longitudinally pushed by a jack, so that the girder body is positioned through the temporary sliding support surface of each pier top. The method is widely applied to construction of prestressed reinforced concrete constant-section continuous beam bridges and cable-stayed bridges. With the development of bridge construction in China, the pushing erection of the large-span steel box girder becomes an important development direction.

The steel box girder is constructed by adopting a multipoint pushing method, a pushing platform is arranged on a main span, and a slideway is arranged on the pushing platform. And welding the steel box girders on the platform section by section, and synchronously performing cyclic operation by using pushing equipment to enable the steel box girders to slide forward section by section, wherein the cyclic operation enables the steel box girders to reach the design position. The steel box girder is produced in factories, transported to a construction site through a road, and all sections are assembled and pushed on a support platform to be gradually pushed in place.

When the existing pushing device is used, as all support platforms are formed by welding sectional materials, certain errors exist between the actual height and the design height of the existing pushing device, the distances between the pushing devices on different support platforms and the bottom surface of the steel box girder are unequal, uneven stress of all pushing devices in pushing operation is easily caused, and when the errors are large, the pushing devices are required to be padded up through cushion blocks, so that the pushing device is complex to use and needs to be improved.

Disclosure of Invention

The utility model aims to provide an integral pushing device for a steel box girder, which aims to solve the problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a whole thrustor of steel case roof beam installs the thrustor at elevation adjustment mechanism top, elevation adjustment mechanism includes the box, a plurality of screws are worn to be equipped with through the perforation in the bottom of box, and the equal fixedly connected with backup pad of bottom of screw, screw and box sliding connection in vertical direction, the outer wall cooperation that the screw is located the box has cup jointed the nut, the outer wall fixedly connected with sleeve pipe of nut, the sleeve pipe rotates with the inner wall of box to be connected, the outer wall fixedly connected with motor of box, the sleeve pipe is all connected with the output shaft transmission of motor through actuating mechanism.

As a further scheme of the utility model: the driving mechanism comprises a worm which is rotatably arranged in the box body, one end of the worm is fixedly connected with an output shaft of the motor, worm gears are fixedly sleeved on the outer wall of the sleeve, the worm gears are distributed on two sides of the worm, the worm gears are meshed with the worm, and the screw threads of the screw rods on two sides of the worm are opposite in direction.

As a further scheme of the utility model: the outer wall of the screw rod is provided with a guide groove along the length direction of the screw rod, the inner wall of the through hole is fixedly connected with a guide block, and the guide block is positioned in the corresponding guide groove.

As a further scheme of the utility model: the pushing mechanism comprises a shell positioned above the box body, a plurality of jacking oil cylinders are fixedly arranged at the bottom of the shell in a penetrating mode, push rod ends of the jacking oil cylinders are fixedly connected with the top of the box body, a sliding table is slidably connected to the top of the shell, a plurality of pushing oil cylinders are fixedly connected to the top of the shell at one end of the sliding table, the push rod ends of the pushing oil cylinders are fixedly connected with the end face of the sliding table, the sliding table is connected with a supporting plate through a deviation correcting mechanism, and two limiting plates are symmetrically and fixedly connected to the top of the shell at two sides of the sliding table.

As still further aspects of the utility model: the correcting mechanism comprises a sliding seat which is slidably arranged in the sliding table, a plurality of correcting cylinders are fixedly connected to the outer walls of two sides of the sliding table, push rod ends of the correcting cylinders are fixedly connected with the sliding seat, and the top of the sliding seat is fixedly connected with the supporting plate through a plurality of weighing sensors.

Compared with the prior art, the utility model has the beneficial effects that:

when the pushing device is used, after the pushing device is arranged on the support platform, the motor is started to drive each sleeve to rotate, the screw rod can downwards extend out of the box body by utilizing the cooperation of the nut and the screw rod until the pushing mechanism is attached to the bottom surface of the beam body, then the beam body can be pushed by utilizing the pushing mechanism, the uniform stress of each pushing mechanism can be ensured, a cushion block is not needed, and the pushing device is more convenient to use.

Drawings

Fig. 1 is a schematic structural view of an integral pushing device for a steel box girder.

Fig. 2 is a schematic structural view of a slide in a steel box girder integral pushing device.

Fig. 3 is a schematic structural view of a driving mechanism in the steel box girder integral pushing device.

Fig. 4 is a schematic view of the installation position of the steel box girder integral pushing device when in use.

The device comprises a box body 1, a screw rod 2, a supporting plate 3, a guide groove 4, a guide block 5, a nut 6, a sleeve 7, a worm wheel 8, a motor 9, a worm 10, a shell 11, a jacking cylinder 12, a pushing cylinder 13, a sliding table 14, a limiting plate 15, a sliding seat 16, a weighing sensor 17, a supporting plate 18, a deviation correcting cylinder 19, a bridge pier 20, a support platform 21 and a beam body 22.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 4, in the embodiment of the utility model, a steel box girder integral pushing device is installed on a pushing mechanism at the top of an elevation adjusting mechanism, the elevation adjusting mechanism comprises a box body 1, a plurality of screws 2 are penetrated through holes at the bottom of the box body 1, the bottom ends of the screws 2 are fixedly connected with a supporting plate 3, the screws 2 are in sliding connection with the box body 1 in the vertical direction, the outer wall of each screw 2 positioned in the box body 1 is matched and sleeved with a nut 6, the outer wall of each nut 6 is fixedly connected with a sleeve 7, the sleeve 7 is rotationally connected with the inner wall of the box body 1, a motor 9 is fixedly connected with the outer wall of the box body 1, the motor 9 can adopt an electric motor or a hydraulic motor, and the sleeves 7 are in transmission connection with an output shaft of the motor 9 through a driving mechanism.

According to the scheme, when the pushing device is used, after being mounted on the support platform 21, the motor 9 is started to drive each sleeve 7 to rotate, the screw 2 can downwards extend out of the box body 1 by means of the cooperation of the nut 6 and the screw 2 until the pushing mechanism is attached to the bottom surface of the beam body 22, then the beam body 22 can be pushed by the pushing mechanism, uniform stress of each pushing mechanism can be ensured, a cushion block is not needed, and the pushing device is more convenient to use.

With specific reference to fig. 1 and 3, in one embodiment of the present utility model, the driving mechanism includes a worm 10 rotatably installed in the case 1, one end of the worm 10 is fixedly connected with an output shaft of the motor 9, the outer walls of the sleeves 7 are fixedly sleeved with worm gears 8, the worm gears 8 are distributed on two sides of the worm 10, the worm gears 8 are meshed with the worm 10, and the screw threads of the screws 2 located on two sides of the worm 10 are opposite in direction.

The worm 10 is driven to rotate by the motor 9, the worm 10 can be utilized to drive the worm gears 8 to rotate simultaneously, and the worm gears 8 positioned at the two sides of the worm 10 are opposite in direction, so that the screws 2 at the two sides of the worm 10 can be simultaneously lifted or lowered by matching with the nuts 6 in the opposite thread directions of the screws 2 at the two sides of the worm 10, and the length of the screws 2 extending out of the box body 1 is adjusted.

With specific reference to fig. 1-3, in one embodiment of the present utility model, the outer wall of the screw 2 is provided with a guide groove 4 along the length direction thereof, the inner wall of the through hole is fixedly connected with a guide block 5, and the guide block 5 is located in the corresponding guide groove 4.

Through the guiding function that guide block 5 and guide slot 4 cooperation played, can avoid screw rod 2 to rotate along with nut 6 to realize the lift of screw rod 2.

Referring to fig. 1, fig. 2, and fig. 4 specifically, in one embodiment of the present utility model, the pushing mechanism includes a housing 11 located above the box 1, a plurality of jacking cylinders 12 are fixedly disposed on the bottom of the housing 11 in a penetrating manner, a push rod end of the jacking cylinders 12 is fixedly connected with the top of the box 1, a sliding table 14 is slidably connected to the top of the housing 11, a plurality of pushing cylinders 13 are fixedly connected to one end of the sliding table 14 at the top of the housing 11, a push rod end of the pushing cylinders 13 is fixedly connected with an end surface of the sliding table 14, the sliding table 14 is connected with a supporting plate 18 through a deviation rectifying mechanism, and two limiting plates 15 are symmetrically and fixedly connected to two sides of the top of the housing 11 located on the sliding table 14.

Through the adoption of the scheme, when the beam body 22 is pushed, after all the supporting plates 18 are contacted with the bottom surface of the beam body 22 through the elevation adjusting mechanism, the jacking cylinder 12 is started to drive the shell 11 to ascend so as to jack up the beam body 22, the beam body 22 is separated from the support on the support platform 21 and the bridge pier 20, the pushing cylinder 13 is started again so as to push the beam body 22 through the supporting plates 18, the jacking cylinder 12 is started to drive the shell 11 to descend, the beam body 22 falls on the support platform 21 and the bridge pier 20 again, the supporting plates 18 are separated from the bottom of the beam body 22, and finally the pushing cylinder 12 is reset, so that the pushing action is completed once, the operations of the jacking cylinder 12 and the pushing cylinder 13 are repeated, and the beam body 22 can be continuously pushed.

With specific reference to fig. 1 and fig. 2, further on the basis of the above embodiment, the deviation rectifying mechanism includes a sliding seat 16 slidably mounted in the sliding table 14, a plurality of deviation rectifying cylinders 19 are fixedly connected to outer walls of two sides of the sliding table 14, push rod ends of the deviation rectifying cylinders 19 are fixedly connected with the sliding seat 16, and top portions of the sliding seat 16 are fixedly connected with the supporting plate 18 through a plurality of weighing sensors 17.

When the beam body 22 deviates in the pushing process, the beam body 22 is pushed up to be separated from the support on the support platform 21 and the bridge pier 20 by the jacking cylinder 12, and then the deviation rectifying cylinder 19 is started, so that the beam body 22 can be pushed to move in the width direction of the bridge, and the deviation rectifying of the beam body 22 is realized;

the reaction force applied by the bridge to the pushing device can be monitored in real time through the arrangement of the weighing sensor 17, and in the process of adjusting the heights of the pushing mechanisms through the elevation adjusting mechanism, the heights of the pushing mechanisms are conveniently adjusted to be consistent with the stress of the supporting plate 18, so that the pushing mechanisms are uniformly stressed during pushing operation.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. The utility model provides a whole thrustor of steel case roof beam which characterized in that: install the pushing mechanism at elevation adjustment mechanism top, elevation adjustment mechanism includes box (1), a plurality of screw rods (2) are worn to be equipped with through the perforation in the bottom of box (1), and the equal fixedly connected with backup pad (3) of bottom of screw rod (2), screw rod (2) and box (1) are in vertical direction sliding connection, outer wall cooperation that screw rod (2) are located box (1) has cup jointed nut (6), the outer wall fixedly connected with sleeve pipe (7) of nut (6), the inner wall rotation of sleeve pipe (7) and box (1) is connected, the outer wall fixedly connected with motor (9) of box (1), sleeve pipe (7) all are connected with the output shaft transmission of motor (9) through actuating mechanism.

2. The steel box girder integral pushing device according to claim 1, wherein: the driving mechanism comprises a worm (10) rotatably mounted in the box body (1), one end of the worm (10) is fixedly connected with an output shaft of the motor (9), worm gears (8) are fixedly sleeved on the outer wall of the sleeve (7), the worm gears (8) are distributed on two sides of the worm (10), the worm gears (8) are meshed with the worm (10) mutually, and the screw threads of the screw rods (2) on two sides of the worm (10) are opposite in direction.

3. The steel box girder integral pushing device according to claim 2, wherein: the outer wall of the screw rod (2) is provided with a guide groove (4) along the length direction, the inner wall of the through hole is fixedly connected with a guide block (5), and the guide block (5) is positioned in the corresponding guide groove (4).

4. The steel box girder integral pushing device according to claim 1, wherein: the pushing mechanism comprises a shell (11) located above a box body (1), a plurality of jacking oil cylinders (12) are fixedly arranged at the bottom of the shell (11) in a penetrating mode, push rod ends of the jacking oil cylinders (12) are fixedly connected with the top of the box body (1), a sliding table (14) is slidably connected to the top of the shell (11), a plurality of pushing oil cylinders (13) are fixedly connected to the top of the shell (11) at one end of the sliding table (14), push rod ends of the pushing oil cylinders (13) are fixedly connected with the end face of the sliding table (14), a supporting plate (18) is connected to the sliding table (14) through a deviation correcting mechanism, and two limiting plates (15) are symmetrically and fixedly connected to the top of the shell (11) at two sides of the sliding table (14).

5. The steel box girder integral pushing device according to claim 4, wherein: the correcting mechanism comprises a sliding seat (16) which is slidably arranged in a sliding table (14), a plurality of correcting cylinders (19) are fixedly connected to the outer walls of two sides of the sliding table (14), push rod ends of the correcting cylinders (19) are fixedly connected with the sliding seat (16), and the top of the sliding seat (16) is fixedly connected with a supporting plate (18) through a plurality of weighing sensors (17).