CN117090138A - Steel box girder construction platform and application method thereof - Google Patents

Abstract

The application relates to the technical field of bridge construction equipment, in particular to a steel box girder construction platform and a use method thereof, wherein the steel box girder construction platform comprises a supporting seat, a supporting frame, a linear driving piece, a driving motor, a main gear, a slave gear, a rack, a lead screw and a working platform; the support frame comprises a top plate and a support rod, the top plate is in sliding connection with the support seat, the support rod and the screw rod are vertically arranged, the screw rod is in rotary connection with the top plate, the support rod is fixedly connected with the top plate, and the working platform is in threaded connection with the screw rod; the linear driving piece is arranged on the top plate, the driving motor is arranged on the linear driving piece, the output shaft of the driving motor is parallel to the lead screw, the main gear is coaxially fixedly connected with the output shaft of the driving motor, the auxiliary gear is coaxially fixedly connected with the lead screw, the rack is horizontally arranged on the supporting seat, the rack is arranged along the length direction of the supporting seat, and the main gear can be respectively meshed with the auxiliary gear and the rack. The application has the effect that the construction platform can achieve the purpose of moving and adjusting so as to improve the flexibility of the construction platform.

Description

Steel box girder construction platform and application method thereof

Technical Field

The application relates to the technical field of bridge construction equipment, in particular to a steel box girder construction platform.

Background

With the rapid development of the steel industry and steel structure technology in China, the number of steel structure bridges is continuously increased, and the steel box girder structure is widely applied. The steel box girder is also called a steel plate box girder, and is a common structural form of a large-span bridge. Is commonly used on bridges with larger spans, and is called a steel box girder because of the appearance of a box. The steel box girder structure has the characteristics of large span, long service life, large torsional rigidity of the box section, small section height and good integrity, and is the first choice of a large-span girder form.

The steel box girder is generally formed by connecting a top plate, a bottom plate, a web plate, a diaphragm plate, a longitudinal diaphragm plate, stiffening ribs and the like in a full welding mode. The construction process of the steel box girder bridge comprises the following steps: and hoisting each steel box girder to a preset position sequentially by using a crane, welding each steel box girder together by constructors, treating welding seams, and carrying out strength acceptance and coating operation by the constructors. The welding operation of the steel box girder can be completed on the bridge deck, but auxiliary tools are needed for the welding operation of the bottom and the side surfaces of the steel box girder, and in order to facilitate the operation of constructors, a construction platform is usually installed on a construction site.

The construction platform described in the related art generally fixes a temporary support on the ground, then installs a fixed working platform on the top of the temporary support, then installs a ladder stand on the temporary support, and a constructor enters the working platform to perform work through the ladder stand. However, once the construction platform is installed, the construction platform cannot be moved, has poor flexibility, has larger limitation and brings inconvenience to construction operation.

Disclosure of Invention

In order to achieve the purpose of moving and adjusting a construction platform and improve the flexibility of the construction platform, the application provides a steel box girder construction platform.

The application provides a steel box girder construction platform which adopts the following technical scheme:

a steel box girder construction platform comprises a supporting seat, a supporting frame, a linear driving piece, a driving motor, a main gear, a slave gear, a rack, a screw rod and a working platform;

the support frame comprises a top plate and a support rod, the top plate is in sliding connection with the support seat, the support rod and the screw rod are vertically arranged, the screw rod is in rotary connection with the top plate, the support rod is fixedly connected with the top plate, and the working platform is in threaded connection with the screw rod;

the linear driving piece is installed on the top plate, the driving motor is installed on the linear driving piece, the output shaft of the driving motor is parallel to the lead screw, the linear driving piece is used for driving the driving motor to achieve lifting, the main gear is fixedly connected with the output shaft of the driving motor coaxially, the auxiliary gear is fixedly connected with the lead screw coaxially, the rack is horizontally arranged on the supporting seat, the rack is arranged along the length direction of the supporting seat, and the main gear can be meshed with the auxiliary gear and the rack respectively.

By adopting the technical scheme, when the construction machine is used, constructors enter the working platform, the linear driving piece is adjusted, so that the main gear is meshed with the auxiliary gear, the driving motor is started, the driving motor drives the screw rod to rotate, the working platform is lifted, and the constructors can reach a preset height to perform construction operation; when the working platform needs to be horizontally moved, the linear driving piece is adjusted, so that the main gear is meshed with the rack, the driving motor is started, and the working platform is horizontally moved through the cooperation of the gear and the rack. Therefore, the construction platform can achieve the purpose of moving and adjusting, the flexibility and the adaptability of the construction platform are improved, and the aim of adjusting the two directions of the working platform can be achieved through one driving source, so that the purpose of saving energy is achieved.

Optionally, the support frame further includes two supports and a plurality of guide bars, two the supports are installed on the upper surface of supporting seat, two the supports are located the both ends of supporting seat, each the both ends of guide bar respectively with the support rigid coupling, each the guide bar parallel arrangement, each the guide bar wears to establish on the roof, roof and each the equal sliding connection of guide bar.

Through adopting above-mentioned technical scheme, through support and guide bar, indirectly fixed work platform, improve stability at drive work platform horizontal migration's in-process simultaneously.

Optionally, the support frame further comprises two groups of guiding mechanisms, the support frame further comprises two support plates arranged in parallel, the two support plates are respectively located at two sides of the support seat, and the two groups of guiding mechanisms are respectively installed at one sides of the two support plates, which are close to each other.

Through adopting above-mentioned technical scheme, the backup pad can play the supporting role, improves intensity, and the leading wheel can reduce friction at the slip in-process simultaneously, plays the guard action.

Optionally, the support frame further comprises a connecting plate, the bottom of the support seat is fixedly connected with the bottom plate, a groove is formed in the bottom plate, the connecting plate is embedded in the groove and can slide in the groove, the screw rod is rotationally connected with the connecting plate, and each support rod is fixedly connected with the connecting plate.

Through adopting above-mentioned technical scheme, the connecting plate can provide the support basis for lead screw and bracing piece, improves work platform and rises or descend the stability in-process.

Optionally, work platform includes loading board and rail guard, the loading board is used for supplying constructor to stand, the rail guard is followed the marginal ring of loading board sets up.

Through adopting above-mentioned technical scheme, loading board and rail guard have constituteed work platform jointly, and the rail guard can play safety protection's purpose.

Optionally, the device further comprises a winch and a basket, wherein the winch is installed on the guard rail, and the basket is connected to the free end of a steel wire rope of the winch.

Through adopting above-mentioned technical scheme, in constructor work progress, can be through the required material of lifting basket replenishment or instrument, no longer need with work platform whole decline, improve the convenience of efficiency of construction and construction.

Optionally, still include control box, weight detection device and alarm lamp, the control box is installed on the work platform, weight detection device with the alarm lamp all with the control box electricity is connected, be provided with the safety threshold in the control box, works as the quality on the loading board is not less than the safety threshold, the control box control the alarm lamp reports to the police.

Through adopting above-mentioned technical scheme, weight detection device can detect the total mass on the loading board, and when the total mass on the loading board was in overweight state, alarm lamp can send alarm signal to remind constructor, thereby improve the security, ensure personal safety.

Optionally, an emergency stop button is arranged on the control box.

By adopting the technical scheme, when equipment has a problem, the emergency stop button stops running, so that the possibility of accidents is reduced.

Optionally, the device further comprises a balancing weight, wherein the balancing weight is arranged on the top plate, and the balancing weight is located at one end, far away from the screw rod, of the top plate.

Through adopting above-mentioned technical scheme, through the balancing weight that sets up, can make whole be in a state of relative equilibrium, reduce the possibility that takes place to empty because of unbalance.

Optionally, the application method of the steel box girder construction platform comprises the following steps:

s1, preparing work before construction: excavating a foundation trench, tamping a substrate, installing a reinforcing steel bar net, embedding a steel connecting piece and pouring concrete;

s2, hoisting the construction platform;

s3, the bottom plate is fixedly connected with the steel connecting piece;

s4, adjusting the linear driving piece to enable the main gear to be meshed with the auxiliary gear;

s5, starting the driving motor, and lifting the working platform to a preset position;

s6, adjusting the linear driving piece to enable the main gear to be meshed with the rack;

s7, starting the driving motor, and horizontally moving the working platform to a preset position.

By adopting the technical scheme, before use, the preparation work is prepared, and a foundation is laid for fixing the construction platform. When the horizontal movement device is used, constructors enter the working platform, the linear driving piece is adjusted, the main gear is meshed with the slave gear, the working platform can ascend, the linear driving piece is adjusted, the main gear is meshed with the rack, and the working platform horizontally moves through the cooperation of the gear and the rack. Therefore, the construction platform can achieve the purpose of moving and adjusting, and the flexibility and adaptability of the construction platform are improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the application is provided with a supporting seat, a supporting frame, a linear driving piece, a driving motor, a main gear, a slave gear, a rack, a lead screw and a working platform, wherein the supporting frame can slide along the length direction of the supporting seat; when the master gear is meshed with the slave gear, the driving motor drives the screw rod to rotate, and the working platform is lifted; when the main gear is meshed with the rack, the working platform can move horizontally. Therefore, the construction platform can achieve the purpose of moving and adjusting, and the flexibility and adaptability of the construction platform are improved;

2. according to the application, the winch is arranged on the working platform, and the lifting basket is connected with the winch, so that when a constructor works, required materials or tools can be supplemented through the lifting basket, the whole working platform does not need to be lowered, and the construction efficiency and convenience of construction are improved;

3. the application is provided with the controller, the weight detection device and the alarm lamp, when the weight detected by the weight detection device is not less than the safety threshold, the controller controls the alarm lamp to alarm so as to remind constructors, thereby improving the safety of the device.

Drawings

FIG. 1 is a schematic structural view of a steel box girder construction platform according to the present application;

FIG. 2 is a side view of the steel box girder construction platform of the present application;

FIG. 3 is an elevation view of a steel box girder construction platform of the present application;

FIG. 4 is a schematic view of the construction of the work platform of the present application;

fig. 5 is a flow chart of a method of using the steel box girder construction platform of the present application.

Reference numerals illustrate: 1. a support base; 2. a support frame; 21. a top plate; 22. a support rod; 23. a support; 24. a guide rod; 25. a support plate; 26. a connecting plate; 3. a first drive assembly; 31. a driving motor; 32. a main gear; 33. a slave gear; 34. a screw rod; 4. a second drive assembly; 41. a rack; 5. a working platform; 51. a carrying plate; 52. a guard rail; 6. a bottom plate; 61. a groove; 7. a slide block; 8. a linear driving member; 9. a guide mechanism; 10. a control box; 11. an emergency stop button; 12. a hoist; 13. a basket; 14. an alarm lamp; 15. and (5) balancing weights.

Detailed Description

The application is described in further detail below with reference to fig. 1-5.

The embodiment of the application discloses a steel box girder construction platform, referring to fig. 1, the steel box girder construction platform comprises a supporting seat 1, a supporting frame 2, a first driving component 3, a second driving component 4 and a working platform 5, wherein the supporting seat 1 can be fixed with an embedded part on the ground through a fastener, the supporting frame 2 is in sliding connection with the supporting seat 1, the first driving component 3 and the working platform 5 are both arranged on the supporting frame 2, the first driving component 3 drives the working platform 5 to vertically lift, and the second driving component 4 drives the supporting frame 2 to move along the length direction of the supporting seat 1.

When the working platform is used, after a constructor enters the working platform 5, the working platform 5 rises to a corresponding height under the action of the first driving assembly 3, and then the working platform 5 can horizontally move to a working position under the action of the second driving assembly 4. Like this, work platform 5 just can reach the purpose of removal regulation, has improved work platform 5's range of motion to make work platform 5's flexibility and practicality stronger.

Specifically, referring to fig. 2 and 3, a bottom plate 6 is fixedly connected to the bottom of the supporting seat 1, the bottom plate 6 is vertically arranged with the supporting seat 1, and the bottom plate 6 is fixed with an embedded part on the ground through a connecting piece. The bottom plate 6 can increase the contact area, improves the stability of construction platform after installation, is convenient for fix simultaneously. It should be noted that, the connection mode of the supporting seat 1 and the bottom plate 6 may be welding, or may be detachable through a connecting piece, which is not limited in this embodiment. The length of the supporting seat 1 needs to be adjusted according to actual conditions so as to meet construction requirements.

Referring to fig. 2 and 3, the support frame 2 includes a top plate 21 and a support rod 22, the top plate 21 can be slidably connected with the support base 1, the support rod 22 is vertically disposed, the support rod 22 is fixedly connected with the top plate 21, and the working platform 5 is slidably connected with the support rod 22. Thus, the working platform 5 can be lifted along the arrangement direction of the support bar 22; the top plate 21 can horizontally move along the setting direction of the support base 1, indirectly realizing the horizontal movement of the working platform 5. Of course, a plurality of support rods 22 may be provided, and in this embodiment, only two support rods 22 are illustrated as examples, and two support rods 22 are respectively located at two sides of the screw 34.

Referring to fig. 2 and 3, the first driving assembly 3 includes a driving motor 31, a main gear 32, a sub gear 33, and a screw 34, the driving motor 31 is mounted on the top plate 21, an output shaft of the driving motor 31 is parallel to the screw 34, the main gear 32 is coaxially and fixedly connected with an output shaft of the driving motor 31, an upper end of the screw 34 is rotatably connected with the top plate 21, the sub gear 33 is coaxially and fixedly connected with the screw 34, the screw 34 is adjacent to an upper end of the screw 34 at a fixed position of the sub gear 33, and the main gear 32 and the sub gear 33 are engaged. Of course, in order to facilitate the connection of the working platform 5 and the screw 34, the sliding block 7 is fixed on the working platform 5, the sliding block 7 is in threaded connection with the screw 34, the supporting rod 22 is arranged on the sliding block 7 in a penetrating manner, and the supporting rod 22 is in sliding connection with the sliding block 7. Thus, the driving motor 31 is started, the driving motor 31 drives the screw rod 34 to rotate, and the working platform 5 can automatically lift under the cooperation of the screw rod 34 and the supporting rod 22.

Referring to fig. 2 and 3, a rack 41 is installed at a side of the support base 1 near the work platform 5, the rack 41 is installed at a position near the top of the support base 1, the rack 41 is disposed along the length direction of the support base 1, and the rack 41, the driving motor 31, and the main gear 32 together constitute the second driving assembly 4. By the cooperation of the main gear 32 and the rack 41, the automatic movement of the top plate 21 in the horizontal direction, that is, the horizontal movement of the work platform 5 is realized.

In particular, the lower surface of the top plate 21 is fixed with a linear driving member 8, the driving motor 31 is mounted on the linear driving member 8, and the linear driving member 8 can drive the driving motor 31 to move vertically, that is, under the action of the linear driving member 8, the main gear 32 can be meshed with the auxiliary gear 33 or the rack 41, and of course, the rack 41 is not coplanar with the auxiliary gear 33, that is, the main gear 32 cannot be meshed with the auxiliary gear 33 and the rack 41 at the same time. Thus, when the main gear 32 is meshed with the auxiliary gear 33, the driving motor 31 drives the screw rod 34 to rotate, and the working platform 5 is lifted; when the main gear 32 is engaged with the rack 41, the work platform 5 can be moved horizontally. Through a driving source, the two directions of the working platform 5 can be adjusted, the structure is simpler, and the purpose of energy saving is achieved.

Thus, after the constructor enters the working platform 5, the linear driving piece 8 is started to drive the main gear 32 to move vertically, so that the main gear 32 is meshed with the auxiliary gear 33, the driving motor 31 is started, the working platform 5 can ascend, then when the position needs to be horizontally adjusted, the linear driving piece 8 is started again, so that the main gear 32 is meshed with the rack 41, the driving motor 31 is started, and the working platform 5 can move horizontally.

It should be noted that, the linear driving member 8 may be an electric guide rod, an air cylinder, an electric cylinder, or the like, and in this embodiment, the limitation is not limited. Of course, according to practical situations, the driving motor 31 may be connected to a frequency converter or a speed reducing mechanism to achieve control of the rotation speed of the driving motor 31.

Referring to fig. 2 and 3, in order to improve stability and safety of the working platform 5 during moving, the supporting frame 2 further includes two supports 23 and a plurality of guide rods 24, the two supports 23 are mounted on the upper surface of the supporting seat 1, the two supports 23 are respectively located at two ends of the supporting seat 1, two ends of each guide rod 24 are respectively fixedly connected with the supports 23, the guide rods 24 are arranged in parallel, each guide rod 24 is penetrated on the top plate 21, and the top plate 21 is slidably connected with each guide rod 24. In this way, the guide bar 24 can play a guiding role, so that the stability of the top plate 21 in the horizontal movement process can be improved; since each guide rod 24 is inserted through the top plate 21, the guide rods 24 can play a supporting role, and the connection strength is improved. Of course, the number of the guide bars 24 is not limited, and in the present embodiment, only three are described as an example.

Referring to fig. 2 and 3, the support frame 2 further includes two parallel support plates 25, the two support plates 25 are respectively located at two sides of the support base 1, the guide mechanisms 9 are mounted on the support plates 25, and the guide mechanisms 9 are mounted at one sides of the two support plates 25, which are close to each other. The supporting plate 25 plays a role in reinforcement, and when constructors work on the working platform 5, the supporting plate 25 can play a role in supporting, so that the supporting strength is further improved; meanwhile, the guide mechanism 9 can play a role in guiding, and the guide wheel can reduce friction in the sliding process, so that the support plate 25 and the support seat 1 are protected. It should be noted that, the guiding mechanism 9 may be a guiding wheel or a guiding rail, or may be a guiding assembly such as a sliding rail and a sliding block 7, and when the guiding wheel is selected, a plurality of guiding wheels may be disposed on each supporting plate 25.

Referring to fig. 2 and 3, the support frame 2 further includes a connection plate 26, a groove 61 is formed on the bottom plate 6, the connection plate 26 is embedded in the groove 61 and can slide in the groove 61, the screw 34 is rotationally connected with the connection plate 26, and each support rod 22 is fixedly connected with the connection plate 26. Thus, by providing the connection plate 26, which corresponds to the support established at the bottom of the screw 34 and the support bar 22, stability can be improved when the work platform 5 moves vertically, while the design of the groove 61 can ensure that the work platform 5 does not interfere with the horizontal movement.

Referring to fig. 3 and 4, specifically, the working platform 5 includes a bearing plate 51 and a guard rail 52, the bearing plate 51 is used for a constructor to stand or place construction materials and construction tools, the guard rail 52 is annularly arranged along the periphery of the bearing plate 51, the guard rail 52 can play a role in safety protection, and safety of the constructor in the construction process can be improved.

Install control box 10 on work platform 5, control box 10 can install on rail guard 52, also can install on loading board 51, through control box 10, the constructor can be in work platform 5 according to actual demand, adjusts work platform 5's position fast, and the adjustment precision is more accurate. The control box 10 is provided with a scram button 11, and when the equipment has a problem, the scram button 11 is pressed, so that the operation can be interrupted, and the possibility of accidents is reduced.

Referring to fig. 3 and 4, a hoist 12 is further installed on the working platform 5, the hoist 12 is installed on the guard rail 52, and a basket 13 is connected to a free end of a wire rope of the hoist 12. In the construction process of constructors, required materials or tools can be supplemented through the lifting basket 13, the whole work platform 5 does not need to be lowered, and the construction efficiency and convenience of construction are improved.

The weight detection device (not shown in the figure) is installed on the bearing plate 51, the alarm lamp 14 is installed on the working platform 5, the weight detection device and the alarm lamp 14 are electrically connected with the control box 10, a safety threshold is arranged in the control box 10, and when the quality on the bearing plate 51 is not less than the safety threshold, the control box 10 controls the alarm lamp 14 to alarm. Thus, the working platform 5 can be conveniently in an overweight state, and the safety in the construction process is improved. Of course, the weight detecting device may be a pressure sensor, a load cell, or the like, and in this embodiment, no specific limitation is made.

In order to further improve safety, a safety rope (not shown) may be provided on the work platform 5, and the safety rope may be connected to the top plate 21. A ladder (not shown) may be provided between the top plate 21 and the bottom plate 6, and when an emergency is encountered, a constructor may reach a safe position through the ladder.

Referring to fig. 1, a counterweight 15 is disposed on the top plate 21, and the counterweight 15 is located at an end of the top plate 21 away from the screw 34. By providing the weight 15, the whole body can be in a relatively balanced state, and the possibility of toppling due to unbalance is reduced. Of course, the weight of the balancing weight 15 needs to be adjusted according to practical situations.

The implementation principle of the steel box girder construction platform provided by the embodiment of the application is as follows: when the construction machine is used, a constructor enters the working platform 5, adjusts the linear driving piece 8, enables the main gear 32 to be meshed with the auxiliary gear 33, starts the driving motor 31, drives the screw rod 34 to rotate by the driving motor 31, enables the working platform 5 to ascend, and enables the constructor to ascend to a designated height for construction operation; when the working platform 5 needs to be moved horizontally, the linear driving member 8 is adjusted so that the main gear 32 is meshed with the rack 41, the driving motor 31 is started, and the working platform 5 is moved horizontally through the cooperation of the gear and the rack 41. Therefore, the construction platform can achieve the purpose of moving and adjusting, the flexibility and the adaptability of the construction platform are improved, and the two directions of the working platform 5 can be adjusted through one driving source, so that the purpose of energy saving is achieved.

The embodiment of the application also discloses a use method of the steel box girder construction platform, and referring to fig. 5, the use method of the steel box girder construction platform comprises the following steps:

s1, preparing work before construction;

specifically, the preparation work before construction comprises the following steps:

s11, excavating a foundation trench;

s12, tamping the substrate;

s13, installing a reinforcing mesh;

s14, embedding a steel connecting piece;

s15, casting concrete.

The excavation of foundation trenches, the tamping of the foundation, the installation of the reinforcing mesh, the embedding of the steel connectors and the casting of the concrete are all operations known to the person skilled in the art, and in this embodiment, the above steps are not described in detail.

S2, hoisting the construction platform;

the construction platform is hoisted to a preset position through a crane, the crane tonnage needs to be guaranteed in the hoisting process to meet the required requirement, and the preformed hole on the bottom plate 6 needs to be guaranteed to be aligned with the embedded steel connecting piece in the hoisting process.

S3, connecting and fixing the bottom plate 6 with the steel connecting piece;

the bottom plate 6 is fixedly connected with the steel connecting piece, so that the strength requirement needs to be met, and the bottom plate and the steel connecting piece can be connected through welding.

S4, adjusting the linear driving piece 8 to enable the main gear 32 to be meshed with the auxiliary gear 33;

the telescopic travel of the linear actuator 8 can be controlled by the control box 10, i.e. by pressing the start button of the control box 10, the master gear 32 and the slave gear 33 are automatically aligned and meshed.

S5, starting the driving motor 31, and lifting the working platform 5 to a preset position;

s6, adjusting the linear driving piece 8 to enable the main gear 32 to be meshed with the rack 41;

s7, starting the driving motor 31, and horizontally moving the working platform 5 to a preset position.

Of course, when constructors finish construction operation, the constructors can contact the connection relation between the steel connecting piece and the bottom plate 6, and the construction platform is lifted to the next construction position through a crane.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (10)

1. The utility model provides a steel case roof beam construction platform which characterized in that: the device comprises a supporting seat (1), a supporting frame (2), a linear driving piece (8), a driving motor (31), a main gear (32), a slave gear (33), a rack (41), a screw (34) and a working platform (5);

the support frame (2) comprises a top plate (21) and a support rod (22), the top plate (21) is in sliding connection with the support seat (1), the support rod (22) and the screw rod (34) are vertically arranged, the screw rod (34) is in rotary connection with the top plate (21), the support rod (22) is fixedly connected with the top plate (21), and the working platform (5) is in threaded connection with the screw rod (34);

the linear driving piece (8) is installed on the top plate (21), the driving motor (31) is installed on the linear driving piece (8) and the output shaft of the driving motor (31) is parallel to the lead screw (34), the linear driving piece (8) is used for driving the driving motor (31) to achieve lifting, the main gear (32) is fixedly connected with the output shaft of the driving motor (31) coaxially, the auxiliary gear (33) is fixedly connected with the lead screw (34) coaxially, the rack (41) is horizontally arranged on the supporting seat (1), the rack (41) is arranged along the length direction of the supporting seat (1), and the main gear (32) can be meshed with the auxiliary gear (33) and the rack (41) respectively.

2. The steel box girder construction platform according to claim 1, wherein: the support frame (2) further comprises two supports (23) and a plurality of guide rods (24), the two supports (23) are arranged on the upper surface of the support seat (1), the two supports (23) are located at two ends of the support seat (1), two ends of each guide rod (24) are fixedly connected with the supports (23) respectively, the guide rods (24) are arranged in parallel, the guide rods (24) are arranged on the top plate (21) in a penetrating mode, and the top plate (21) is in sliding connection with the guide rods (24).

3. The steel box girder construction platform according to claim 2, wherein: the support frame (2) further comprises two support plates (25) which are arranged in parallel, the two support plates (25) are respectively located at two sides of the support seat (1), and the two guide mechanisms (9) are respectively arranged at one sides of the two support plates (25) which are close to each other.

4. The steel box girder construction platform according to claim 1, wherein: still include bottom plate (6), support frame (2) still include connecting plate (26), the bottom of supporting seat (1) with bottom plate (6) rigid coupling, set up recess (61) on bottom plate (6), connecting plate (26) inlay and establish in recess (61) and can be in slide in recess (61), lead screw (34) with connecting plate (26) rotate and are connected, each bracing piece (22) with connecting plate (26) rigid coupling.

5. The steel box girder construction platform according to claim 1, wherein: the working platform (5) comprises a bearing plate (51) and a protective guard (52), wherein the bearing plate (51) is used for a constructor to stand, and the protective guard (52) is circumferentially arranged along the edge of the bearing plate (51).

6. The steel box girder construction platform according to claim 5, wherein: the novel steel wire rope lifting device is characterized by further comprising a winch (12) and a lifting basket (13), wherein the winch (12) is installed on the protective guard (52), and the lifting basket (13) is connected to the free end of the steel wire rope of the winch (12).

7. The steel box girder construction platform according to claim 1, wherein: still include control box (10), weight detection device and alarm lamp (14), alarm lamp (14) control box (10) are all installed on work platform (5), weight detection device installs on loading board (51), weight detection device with alarm lamp (14) all with control box (10) electricity is connected, be provided with the safety threshold in control box (10), works as when the quality on loading board (51) is not less than the safety threshold, control box (10) control alarm lamp (14) report to the police.

8. The steel box girder construction platform of claim 7, wherein: the control box (10) is provided with an emergency stop button (11).

9. The steel box girder construction platform according to claim 1, wherein: still include balancing weight (15), balancing weight (15) set up on roof (21), balancing weight (15) are located roof (21) are kept away from one end of lead screw (34).

10. A method for using a steel box girder construction platform, based on the steel box girder construction platform as claimed in claims 1-9, characterized in that: the method comprises the following steps:

s1, preparing work before construction: excavating a foundation trench, tamping a substrate, installing a reinforcing steel bar net, embedding a steel connecting piece and pouring concrete;

s2, hoisting the construction platform;

s3, the bottom plate (6) is fixedly connected with the steel connecting piece;

s4, adjusting the linear driving piece (8) to enable the main gear (32) to be meshed with the auxiliary gear (33);

s5, starting the driving motor (31), and lifting the working platform (5) to a preset position;

s6, adjusting the linear driving piece (8) to enable the main gear (32) to be meshed with the rack (41);

s7, starting the driving motor (31), and horizontally moving the working platform (5) to a preset position.