CN113911904A - Steel arch rib single-hook air turning-over device and using method thereof - Google Patents

Abstract

The steel arch rib single-hook air turning-over device comprises the following steps: determining the center of gravity and installing an auxiliary system, connecting a main beam system, lifting equipment lifting devices and steel arch rib sections into the air, starting a power system, turning over the steel arch rib sections in the air, closing the power system, lowering the device to the ground after the device is stabilized, removing the steel arch rib sections from flexible straps, and removing the auxiliary system from the steel arch rib sections to complete turning over. The invention has simple operation, high turnover efficiency, small occupied space and good economical efficiency; the method has obvious effects on safe operation and surface protection of the steel arch rib segments, and has higher practicability and popularization value.

Description

Steel arch rib single-hook air turning-over device and using method thereof

Technical Field

The invention belongs to the technical field of fixed building bridge segment rotating methods and equipment, and particularly relates to a steel arch rib single-hook air turning-over device and a using method thereof.

Background

The steel arch bridge has the advantages that the steel arch bridge is used as a landmark building and becomes the first choice of an urban bridge in recent years due to the superior stress characteristic and the beautiful landscape characteristic, the turnover of the arch rib is inevitable in the manufacturing and installation process of the steel arch rib in order to meet the requirements of welding positions or transportation, and the turnover of the steel arch rib is always the key link of arch rib construction and determines the welding quality and the construction progress. At present, in the manufacturing and field installation processes of a steel arch bridge, the turning over of a large-scale steel arch rib is generally realized by matching a plurality of hoisting devices with an L-shaped lifting appliance, and the scheme has the following defects: (1) the equipment and personnel investment is large, and the production cost is high; (2) the surface of a rod piece is easily damaged in the turning process of the L-shaped lifting appliance, so that the quality control is not facilitated; (3) a plurality of hoisting devices operate synchronously, so that the safety risk is increased; (4) the turning-over process occupies a larger area and influences other operations. In view of this, the following improvement is proposed.

Disclosure of Invention

The technical problems solved by the invention are as follows: the steel arch rib single-hook air turning-over device comprises a main beam system, a gantry lifting hook, a power system, a flexible hanging strip, an auxiliary system and a main beam system, wherein the main beam system is connected with the gantry lifting hook to lift a steel arch rib section into the air; the structure is simple, economical and practical; the steel arch rib segment is free from friction damage, drilling on the steel arch rib is not needed, and the structure of the steel arch rib is not damaged; the turnover is safe and reliable; effectively vacate the space of place, do not disturb other ground operations.

The technical scheme adopted by the invention is as follows: the use method of the steel arch rib single-hook air turning-over device comprises the following steps:

s001, determining the gravity center of the steel arch rib section to be turned, and respectively positioning the positions of the auxiliary systems at the left side and the right side of the gravity center of the steel arch rib section along the length direction of the steel arch rib section to ensure that the auxiliary systems 5 are arranged in a left-right axial symmetry manner along the length direction of the steel arch rib section; fastening the auxiliary system to the left side and the right side of the steel arch rib segment by using fasteners;

s002, connecting the steel arch rib sections provided with the auxiliary system with the main beam system through the flexible hanging strips of the transmission system, and ensuring that the auxiliary system, the flexible hanging strips and the power output end of the power system are on the same plumb line;

s003, lifting the steel arch rib single-hook air turnover device and the steel arch rib segment to the air through hoisting equipment;

s004, after the steel arch rib single-hook air turnover device and the steel arch rib section are stabilized in the air, starting a power system, driving a driving motor of the power system to drive a flexible hanging strip to rotate, driving an auxiliary system to turn over by the flexible hanging strip, and driving the steel arch rib section to turn over in the air by the turned auxiliary system;

s005, turning over the steel arch rib segment by a certain angle, then turning off a power supply of a driving motor in the power system, and after the steel arch rib segment and the steel arch rib single-hook air turning-over device are stabilized, lowering the steel arch rib segment and the steel arch rib single-hook air turning-over device to the ground through hoisting equipment;

s006, removing the steel arch rib segment from the flexible sling of the transmission system, and removing the auxiliary system from the steel arch rib segment to complete the turning of the steel arch rib segment.

In the above technical solution, further: in step S005, the steel arch rib segment turnover angle is 90 ° or less.

The steel arch rib single-hook air turning-over device is provided with a main beam system, and the main beam system is connected with a gantry lifting hook; the symmetrical sides of the horizontal shaft of the main beam system are respectively provided with a power system which is symmetrical with the left and right shafts, and the power systems which are symmetrical with the left and right shafts work synchronously; the power system which works synchronously drives the flexible hanging strips which are in horizontal axial symmetry to the left and the right to rotate synchronously in a vertical plane through belt transmission respectively, the flexible hanging strips which are in horizontal axial symmetry to the left and the right respectively stir the auxiliary systems which are in horizontal axial symmetry to turn in the vertical plane, and the auxiliary systems which are in horizontal axial symmetry to the left and the right tightly hold the left and the right sides of the steel arch rib section to drive the steel arch rib section to turn in the vertical plane in the air.

In the above technical solution, further: the main beam system is provided with a cross beam, and the middle part of the cross beam is connected with a gantry lifting hook in a hanging way through the top point of an isosceles triangle of the isosceles triangle supporting structure.

In the above technical solution, further: the isosceles triangle supporting structure is two connecting rods which are symmetrical in left-right axis and are inclined at equal length; the two connecting rods and the cross beam form an isosceles triangle supporting structure; the gantry lifting hook is of a double-hook head structure with left and right axisymmetric structures, and the double hook heads of the double-hook head structure are respectively hung at the top ends of connecting rods with left and right axisymmetric and inclined directions; the bottom ends of the left and right axisymmetric and inclined connecting rods are symmetrically hinged with the left and right of the beam.

In the above technical solution, further: the left and right axisymmetric power systems of the beam are respectively and fixedly installed; the power system is provided with a mounting seat, the top end of the mounting seat is fixedly connected with the cross beam into a whole, the bottom end of the mounting seat rotatably supports and mounts a transmission shaft, and the shaft end of the transmission shaft is coaxially and fixedly connected with a power output shaft of the driving motor; the transmission shaft axis body middle part is coaxial fixed mounting driving pulley, and driving pulley adaptation flexible suspender rotates in order to drive flexible suspender.

In the above technical solution, further: the driving motor is a three-phase asynchronous speed reducing motor; two axisymmetric three-phase asynchronous speed reducing motors are connected in series with a control switch and then are connected into a power supply circuit to realize the synchronous operation of two driving motors.

In the above technical solution, further: the auxiliary system is provided with a clamping part which is symmetrical with the left and right axes; the clamping part encircles the complete outer side wall of the steel arch rib section; the outer side walls of the clamping parts which are symmetrical with the left and right axes are respectively provided with a left hanging belt groove and a right hanging belt groove, and the left hanging belt groove and the right hanging belt groove form a complete annular groove; the flexible sling is put into the annular groove and is matched with the annular groove, the flexible sling drives the auxiliary system to turn over, and the auxiliary system drives the steel arch rib section to turn over.

In the above technical solution, further: the clamping part consists of a left inner template, a right inner template, a left middle cushion block, a right middle cushion block, a left outer groove and a right outer groove; the left and right inner shaping plates have the same appearance structure with the steel arch rib sections, and the left and right inner shaping plates are fit with the outer side walls of the steel arch rib sections; the left and right external grooves are respectively a left and right semi-circular ring profile structure with left and right axisymmetric axes, the gaps between the left and right external grooves and the left and right internal templates are respectively filled by a left and right middle cushion blocks, and the left and right internal templates are connected with the left and right external grooves into a whole by the left and right middle cushion blocks; the clamping parts with the left and right axisymmetrics are fixedly connected into a whole through fasteners at the end parts of the clamping parts with the left and right axisymmetrics, and the clamping parts with the left and right axisymmetrics are used for encircling and tightly holding and fixedly connecting the outer side walls of the steel arch rib sections.

Compared with the prior art, the invention has the advantages that:

1. the invention breaks through the limitation of cooperative turning of a plurality of devices, adopts a gantry crane of a single hoisting device and combines a synchronous motor, thus realizing the purpose of turning over the steel arch rib segment in the air and saving the cost to the utmost extent.

2. The turning over of the steel arch rib section is realized through the flexible hanging strip, the auxiliary system tightly holds the steel arch rib section, and the dynamic flexible hanging strip avoids the friction contact with the steel arch rib section, so that the damage of an L-shaped lifting appliance in the turning process of the traditional method to the steel arch rib section is avoided, and the manufacturing quality of the steel bridge is improved.

3. The single hoisting equipment has good coordination in the turning process, and the two synchronous motors are connected in series and share one switch and then are connected into the power supply circuit, so that the defect that the synchronous operation of a plurality of hoisting equipment is difficult to synchronize is avoided, and the safety risk is reduced to a certain extent.

4. The turnover mechanism can complete turnover in the air, occupies a small space in the turnover process, is only the horizontal projection area of the steel arch rib segment and the lifting appliance, greatly saves a production field, and does not influence the implementation of other operations.

Drawings

FIG. 1 is a perspective view of the steel arch rib single hook air turn-over device of the present invention in an exploded state;

FIG. 2 is an enlarged detail view of the top end of FIG. 1 according to the present invention;

FIG. 3 is a perspective view of the auxiliary system of FIG. 1 of the present invention installed on a steel rib segment;

FIG. 4 is a state view of the steel arch rib segment of the present invention prior to aerial inversion;

fig. 5 is a view of the arch rib segment of the present invention in an aerial turn;

FIG. 6 is a view of the present invention after the rib segments have been turned over in the air;

in the figure: 1-main beam system, 2-gantry lifting hook, 3-power system, 4-flexible hanging strip, 5-auxiliary system and 6-steel arch rib segment; 101-beam, 102-isosceles triangle support structure, 1021-connecting rod, 201-double hook head structure; 301-mounting seat, 302-transmission shaft, 303-driving motor; 501-clamping part, 502-left and right sling groove; 5011-left and right inner mould plates, 2012-left and right middle cushion blocks, 5013-left and right outer grooves.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 6 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The use method of the steel arch rib single-hook air turning-over device comprises the following steps:

s001, determining the gravity center of a steel arch rib section 6 to be turned, and respectively positioning the auxiliary systems 5 at the left side and the right side of the gravity center of the steel arch rib section 6 along the length direction of the steel arch rib section 6 so that the auxiliary systems 5 are arranged in a left-right axial symmetry manner along the length direction of the steel arch rib section 6; the auxiliary system 5 is tightened with fasteners against the left and right sides of the steel rib segment 6. According to the step, the lifted steel arch rib segment 6 keeps balance in later-stage overturning action, the accidental falling is avoided, and the overturning safety and reliability are improved.

And S002, connecting the steel arch rib segment 6 provided with the auxiliary system 5 with the main beam system 1 through the flexible hanging strip 4 of the transmission system, and ensuring that the auxiliary system 5, the flexible hanging strip 4 and the power output end of the power system 3 are on the same plumb line. The flexible hanging strips 4 and the power system 3 are arranged in a left-right axial symmetry mode relative to the gravity center of the steel arch rib section 6, so that the perpendicularity of the steel arch rib in the vertical direction is guaranteed, and the stability of later turning action is guaranteed.

And S003, lifting the steel arch rib single-hook air turnover device and the steel arch rib segment 6 to the air through hoisting equipment. This step allows the device and the steel arch rib segments 6 to complete their movements in the air, avoiding occupying ground space, providing sufficient ground working space for other ground process operations.

Step S004, after the steel arch rib single-hook air turnover device and the steel arch rib section 6 are stabilized in the air, starting the power system 3, driving a driving motor 303 of the power system 3 to drive a flexible hanging strip 4 to rotate, driving an auxiliary system 5 to turn over by the flexible hanging strip 4, and driving the steel arch rib section 6 to turn over in the air by the turned auxiliary system 5. The auxiliary system 5 is turned over through belt transmission, the turned auxiliary system 5 drives the steel arch rib sections 6 to turn over, manpower is replaced, turning action is completed, and the steel arch rib turning device is good in synchronism, energy-saving, time-saving, labor-saving and efficient.

Step S005, after the steel arch rib section 6 is turned over for a certain angle, the power supply of the driving motor 303 in the power system 3 is turned off, and after the steel arch rib section 6 and the steel arch rib single-hook air turning-over device are stabilized, the steel arch rib section 6 and the steel arch rib single-hook air turning-over device are lowered to the ground through hoisting equipment. This step allows the device and the inverted steel rib segment 6 to be lowered to the assembly point, ready for a subsequent welding operation.

Step S006, removing the steel arch rib section 6 from the flexible suspender 4 of the transmission system, and removing the auxiliary system 5 from the steel arch rib section 6 to complete the turning of the steel arch rib section 6.

In the above embodiment, further: in step S005, the steel arch rib segment 6 is turned over at an angle of less than or equal to 90 °, for example, 45 ° or 90 °. This angle can be accurately controlled by controlling the operating time of the drive motor 303 in the power system 3.

The invention also comprises a steel arch rib single-hook air turning-over device (shown in figures 1 to 6), which is provided with a main beam system 1, wherein the main beam system 1 is connected with a gantry hook 2. In the above embodiment, further: the main beam system 1 is provided with a cross beam 101, and the cross beam 101 is welded by steel plates to form a hollow horizontal supporting structure.

The middle part of the beam 101 is connected with the gantry hook 2 through the top point of an isosceles triangle of the isosceles triangle supporting structure 102 in a hanging way. The isosceles triangle supporting structure 102 is stable in structural support, one lifting point of the isosceles triangle can stably lift two supported structures which are symmetrical in a left-right axis mode on the bottom edges of the two isosceles triangles in a shaking-proof mode, the structural support is stable, and the deformation-preventing effect is achieved.

In the above embodiment, further: the isosceles triangle support structure 102 is formed by two links 1021 with equal length and being inclined and symmetrical about the left-right axis. The connecting rod 1021 consists of a front connecting plate, a rear connecting plate and a pin shaft. Simple structure, the preparation is easy, and structural support is stable.

The upper end and the lower end of the inclined front connecting plate and the inclined rear connecting plate are respectively and fixedly provided with a pin shaft. The front connecting plate and the rear connecting plate are connected into a whole by a pin shaft, and the pin shaft at the upper end is used for hanging and connecting the gantry hook 2; the lower pin shaft is used for hinging a cross beam 101 described later. The two connecting rods 1021 and the beam 101 form an isosceles triangle support structure 102.

As shown in fig. 2, the gantry hook 2 is a double hook head structure 201 with left and right axisymmetric, and the double hook heads of the double hook head structure 201 are respectively hooked with pin shafts at the top ends of the left and right axisymmetric and inclined connecting rods 1021.

The bottom ends of the left and right axisymmetric and inclined connecting rods 1021 are symmetrically hinged with the left and right axisymmetric of the beam 101, so that the connecting rods 1021 and the double-hook head structure 201 of the gantry hook 2 can be conveniently hung manually, and the device can be conveniently detached from the gantry hook 2 after the overturning is completed.

The hanging connection is convenient to operate, the hanging connection is convenient, the isosceles triangle supporting structure 102 is combined, the supporting is stable, and the structure is firm.

The symmetrical sides of the horizontal shaft of the main beam system 1 are respectively provided with a power system 3 which is symmetrical with the left and right shafts, and the power systems 3 which are symmetrical with the left and right shafts work synchronously. The power system referred to herein includes any one of the drive motors.

In the above embodiment, further: the left and right axisymmetric power systems 3 are respectively and fixedly arranged on the left and right axisymmetric beam 101; the power system 3 has a mount 301. The mounting seat 301 is made of steel plates through tailor welding. The reinforcing ribs are arranged on the outer side of the mounting seat 301 to prevent the mounting seat from being twisted and deformed.

The top end of the mounting seat 301 and the cross beam 101 can be welded and fixedly connected into a whole, and can also be fixedly connected with the cross beam 101 into a whole by using a fastener.

The transmission shaft 302 is rotatably supported and mounted at the bottom end of the mounting seat 301, the transmission shaft 302 can be rotatably supported and mounted at the bottom of the mounting seat 301 through a bearing, and the transmission shaft 302 can also be rotatably supported and mounted at the bottom of the mounting seat 301 through a shaft sleeve.

The shaft end of the transmission shaft 302 can be coaxially and fixedly connected with a power output shaft of a driving motor 303 through a coupling; the driving motor 303 rotates at a low speed to drive the transmission shaft 302 to rotate. Where the drive motor includes a speed reducer.

The middle part of the shaft body of the transmission shaft 302 is coaxially and fixedly provided with a transmission belt wheel, and the transmission belt wheel is matched with the flexible hanging strip 4 so as to drive the flexible hanging strip 4 to rotate in a vertical plane. The transmission belt wheel in the middle of the transmission shaft 302, the flexible hanging strip 4 and the auxiliary device 5 are on the same plumb line.

In the above embodiment, preferably: the driving motor 303 is a three-phase asynchronous reduction motor; two axisymmetric three-phase asynchronous speed reducing motors are connected in series with a control switch and then are connected into a power supply circuit to realize the synchronous operation of two driving motors 303. Two three-phase asynchronous speed reducing motors are connected in series, and the two motors are connected in series and then connected with a control switch in series to be connected to a power supply circuit. The synchronous start-stop power supply switching of the two three-phase asynchronous speed reducing motors is realized by pressing and controlling a control switch, so that the synchronous operation of the two motors is realized; the circuit is greatly simplified, the structure is simple, and the device is economical and practical.

In addition, the three-phase asynchronous speed reducing motor is adopted for driving, and the three-phase asynchronous speed reducing motor has the advantages of simple structure, reliable operation, low price, strong overload capacity, convenience in use, installation and maintenance and the like.

The synchronously working power system 3 respectively drives the flexible hanging strips 4 which are horizontally symmetrical to the left and the right through belt transmission to synchronously rotate.

The horizontal left and right axisymmetric flexible braces 4 respectively stir the horizontal left and right axisymmetric auxiliary systems 5 to turn over in the vertical plane, and the horizontal left and right axisymmetric auxiliary systems 5 tightly hold the left and right sides of the steel arch rib section 6 to drive the steel arch rib section 6 to turn over in the vertical plane. The steel arch rib segment 6 is turned over in a belt transmission mode, the structure is simple, the manufacture is easy, the turning is stable, reliable, convenient and fast, and the turning angle is controlled accurately.

It should be noted that: the mounting position of the auxiliary system 5 is accurately determined according to the gravity center position of the steel arch rib segment 6, and the stability of the steel arch rib segment 6 in the turning process is ensured; the two auxiliary systems 5 are always kept in a parallel state; the transmission system, namely the flexible sling 4, has enough strength to ensure the safety of turning over the steel arch rib section in the air; the three-phase asynchronous speed reducing motors have enough torsion and are controlled by the same control switch, so that the two three-phase asynchronous speed reducing motors can synchronously drive the steel arch rib sections 6 to turn.

(see again fig. 1) in the above embodiment, further: the assist system 5 has a clamping portion 501 that is axisymmetric to the left and right; the clamping portion 501 embraces the complete outer side wall of the steel arch rib segment 6. Embrace tightly, prevent that flexible suspender 4 friction from contacting steel arch rib festival section 6, prevent the appearance of steel arch rib festival section friction damage problem.

The outer side walls of the clamping parts 501 which are symmetrical to each other in the left-right axis are respectively provided with a left sling groove 502 and a right sling groove 502, and the left sling groove 502 and the right sling groove 502 form a complete annular groove; so that flexible suspender 4 can be brought into the ring channel to with the ring channel adaptation, drive auxiliary system 5 upset through flexible suspender 4 promptly belt transmission, auxiliary system 5 drives the upset of steel arch rib festival section 6. Namely, the auxiliary system 5 is stirred to overturn through belt transmission, and the auxiliary system 5 drives the steel arch rib segment 6 fixedly connected with the auxiliary system to overturn.

In the above embodiment, further: the clamp 501 is comprised of left and right inner die plates 5011, left and right middle spacers 5012, and left and right outer slots 5013. And a middle cushion block is arranged between the inner shaping plate and the outer shaping groove.

The left and right inner die plates 5011 are identical to the steel arch rib sections 6 in shape and structure, and the left and right inner die plates 5011 are in fit with the outer side walls of the steel arch rib sections 6 so as to be tightly attached to the outer side walls of the steel arch ribs through the left and right inner die plates 5011 to stably clamp the steel arch rib sections 6.

The left and right outer slots 5013 are left and right semi-circular ring profile structures with left and right axisymmetric shapes respectively, and are spliced to form a complete circular groove, so that the effect of a driven belt wheel is achieved, and then the overturning is completed.

Gaps between the left and right outer-shaped grooves 5013 and the left and right inner templates 5011 are filled with left and right middle cushion blocks 5012 respectively, and the left and right middle cushion blocks 5012 can be of a plastic structure to reduce the weight of the device, so that the effective work of the motor is improved.

The left and right middle spacers 5012 connect the left and right inner plates 5011 and the left and right outer slots 5013 together, and may be specifically bonded together, so that the left and right inner plates 5011 and the left and right outer slots 5013 are prevented from being deformed by the left and right middle spacers 5012.

The end parts of the clamping parts 501 with the left and right axisymmetric axes fixedly connect the left and right clamping parts 501 into a whole through fasteners, and the clamping parts 501 with the left and right axisymmetric axes are used for embracing and tightly connecting the outer side wall of the steel arch rib segment 6. The fastening piece used in the position comprises a fastening bolt and a nut, the end parts of the clamping parts 501 with the left and right axisymmetrics are respectively provided with a connecting lug plate, and the fastening bolt passes through the lug plate through holes at the involutory end parts of the clamping parts 501 with the left and right axisymmetrics and is fastened by using a nut piece to realize involutory fixed connection of the end parts of the clamping parts 501.

Therefore, the invention breaks through the limitation of cooperative turning of a plurality of devices, adopts a single hoisting device gantry crane and combines a synchronous motor, thus realizing the purpose of turning over the steel arch rib segment in the air and saving the cost to the utmost extent.

The turning over of the steel arch rib section is realized through the flexible hanging strip 4, the auxiliary system 5 tightly holds the steel arch rib section 6, the dynamic flexible hanging strip 4 avoids frictional contact with the steel arch rib section 6, the damage to the steel arch rib section in the turning process of the L-shaped lifting appliance in the traditional method is avoided, and the manufacturing quality of the steel bridge is improved.

The single hoisting equipment has good coordination in the turning process, and the two synchronous motors are connected in series and share one control switch and then are connected into the power supply circuit, so that the defect that the synchronous operation of a plurality of hoisting equipment is difficult to synchronize is avoided, and the safety risk is reduced to a certain extent.

The turnover mechanism can complete turnover in the air, occupies a small space in the turnover process, is only the horizontal projection area of the steel arch rib segment and the lifting appliance, greatly saves a production field, and does not influence the implementation of other operations.

Fig. 3 is a schematic view of the installation of the auxiliary device 5 on the steel arch rib segment 6 to be turned over, and fig. 4 is a schematic view of the steel arch rib segment 6 to be turned over after the installation of the auxiliary system 5 and the flexible suspender 4 of the transmission system; fig. 5 is a schematic view of a steel arch rib segment 6 turned 45 ° in the air; fig. 6 is a schematic view of a completed inversion of a steel rib segment.

In conclusion, the device has the characteristics of simple operation, high turnover efficiency, small occupied space, good economical efficiency and the like. The method has obvious effect in the aspects of safe operation and surface protection of the steel arch rib segment without drilling processing and the like, and has higher practical and popularization values.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (9)

1. The using method of the steel arch rib single-hook air turning-over device is characterized by comprising the following steps:

s001, determining the gravity center of the steel arch rib segment (6) to be turned, and respectively positioning the auxiliary systems (5) at the left side and the right side of the gravity center of the steel arch rib segment (6) along the length direction of the steel arch rib segment (6) so that the auxiliary systems (5) are arranged in a left-right axial symmetry mode along the length direction of the steel arch rib segment (6); fastening the auxiliary system (5) to the left and right sides of the steel arch rib segment (6);

s002, connecting the steel arch rib segment (6) provided with the auxiliary system (5) with the main beam system (1) through the flexible sling (4) of the transmission system, and ensuring that the auxiliary system (5), the flexible sling (4) and the power output end of the power system (3) are on the same plumb line;

s003, lifting the steel arch rib single-hook air turnover device and the steel arch rib segment (6) to the air through hoisting equipment;

s004, after the steel arch rib single-hook air turnover device and the steel arch rib section (6) are stabilized in the air, starting the power system (3), driving a driving motor (303) of the power system (3) to drive a flexible hanging strip (4) to rotate, driving an auxiliary system (5) to turn over by the flexible hanging strip (4), and driving the steel arch rib section (6) to turn over in the air by the turning auxiliary system (5);

s005, turning over the steel arch rib section (6) by a certain angle, then closing a power supply of a driving motor (303) in the power system (3), and after the steel arch rib section (6) and the steel arch rib single-hook air turning-over device are stabilized, lowering the steel arch rib section (6) and the steel arch rib single-hook air turning-over device to the ground through hoisting equipment;

s006, removing the steel arch rib section (6) from the flexible suspender (4) of the transmission system, and removing the auxiliary system (5) from the steel arch rib section (6) to complete the turning of the steel arch rib section (6).

2. The use method of the steel arch rib single-hook air turn-over device according to claim 1, characterized in that: in step S005, the steel arch rib segment (6) is turned by an angle of 90 ° or less.

3. A steel arch rib single-hook air turn-over device used in the method for using the steel arch rib single-hook air turn-over device according to any one of claims 1 to 2, which is characterized in that: the steel arch rib single-hook air turning-over device is provided with a main beam system (1), wherein the main beam system (1) is connected with a gantry lifting hook (2); the symmetrical sides of the horizontal shaft of the main beam system (1) are respectively provided with a power system (3) which is symmetrical to the left and right shafts, and the power systems (3) which are symmetrical to the left and right shafts work synchronously; the power system (3) which synchronously works drives the flexible hanging strips (4) which are in horizontal axial symmetry to the left and the right to synchronously rotate in a vertical plane through belt transmission respectively, the flexible hanging strips (4) which are in horizontal axial symmetry to the left and the right respectively stir the auxiliary systems (5) which are in horizontal axial symmetry to turn in the vertical plane, and the auxiliary systems (5) which are in horizontal axial symmetry to the left and the right tightly hold the left and the right sides of the steel arch rib section (6) to drive the steel arch rib section (6) to turn in the air.

4. A steel arch rib single hook air turn-over device as claimed in claim 3, wherein: the main beam system (1) is provided with a cross beam (101), and the middle part of the cross beam (101) is connected with a gantry lifting hook (2) in a hanging way through the top point of an isosceles triangle of the isosceles triangle supporting structure (102).

5. The steel arch rib single-hook air turning-over device as claimed in claim 4, wherein: the isosceles triangle supporting structure (102) is two connecting rods (1021) which are axially symmetrical left and right and are inclined at equal length; the two connecting rods (1021) and the cross beam (101) form an isosceles triangle supporting structure (102); the gantry lifting hook (2) is a double-hook head structure (201) which is axisymmetric left and right, and double hook heads of the double-hook head structure (201) are respectively hung at the top ends of connecting rods (1021) which are axisymmetric left and right and inclined; the bottom ends of the left and right axisymmetric and inclined connecting rods (1021) are hinged with the left and right axisymmetric of the beam (101).

6. A steel arch rib single-hook air turn-over device as claimed in claim 4 or 5, wherein: the left and right axisymmetric power systems (3) are respectively and fixedly arranged on the cross beam (101) in a left-right axisymmetric manner; the power system (3) is provided with a mounting seat (301), the top end of the mounting seat (301) is fixedly connected with the cross beam (101) into a whole, the bottom end of the mounting seat (301) rotatably supports and mounts a transmission shaft (302), and the shaft end of the transmission shaft (302) is coaxially and fixedly connected with a power output shaft of a driving motor (303); the transmission shaft (302) is coaxially and fixedly provided with a transmission belt wheel in the middle, and the transmission belt wheel is matched with the flexible hanging strip (4) to drive the flexible hanging strip (4) to rotate.

7. The steel arch rib single-hook air turning-over device as claimed in claim 6, wherein: the driving motor (303) is a three-phase asynchronous speed reducing motor; two axisymmetric three-phase asynchronous speed reducing motors are connected in series with a control switch and then are connected into a power supply circuit to realize the synchronous operation of two driving motors (303).

8. A steel arch rib single hook air turn-over device as claimed in claim 3, wherein: the auxiliary system (5) has a clamping part (501) with axial symmetry; the clamping part (501) embraces and tightly holds the complete outer side wall of the steel arch rib section (6); the outer side walls of the clamping parts (501) which are symmetrical to each other in the left-right axis are respectively provided with a left hanging belt groove (502) and a right hanging belt groove (502), and the left hanging belt groove and the right hanging belt groove (502) form a complete annular groove; the flexible sling (4) is accommodated in the annular groove and matched with the annular groove, the flexible sling (4) drives the auxiliary system (5) to turn over, and the auxiliary system (5) drives the steel arch rib section (6) to turn over.

9. The steel arch rib single-hook air turning-over device as claimed in claim 8, wherein: the clamping part (501) consists of a left inner template (5011), a right inner template (5011), a left middle cushion block (5012), a right middle cushion block (5012) and a left outer groove (5013); the left and right inner templates (5011) have the same appearance structure as the steel arch rib segment (6), and the left and right inner templates (5011) are fit with the outer side wall of the steel arch rib segment (6); the left outer groove (5013) and the right outer groove (5013) are respectively of a left semi-circular section structure and a right semi-circular section structure which are axially symmetrical to each other, gaps between the left outer groove (5013) and the left inner template (5011) and between the right outer groove (5013) and the left inner template (5011) are respectively filled with a left middle cushion block (5012) and a right middle cushion block (5012), and the left inner template (5011) and the right inner template (5011) are connected with the left outer groove (5013) and the right outer groove (5013) into a whole through the left middle cushion blocks (5012); the clamping parts (501) with the left and right axisymmetrics are fixedly connected into a whole by the end parts of the clamping parts (501) with the left and right axisymmetrics through fasteners, and the clamping parts (501) with the left and right axisymmetrics are used for encircling and tightly holding the outer side wall of the steel arch rib section (6).

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