Steel beam truss piece turnover frame structure and steel beam truss piece turnover method

Abstract

The invention relates to a steel beam truss piece turnover frame structure and a steel beam truss piece turnover method. The middle of the rotating tray is hinged to the top of the supporting assembly; one end of the rotating tray is provided with a reset counterweight piece, and two sides of the other end are provided with connecting parts; the driving assembly 5 is connected with the connecting parts through traction ropes and used for winding or unwinding the traction ropes, so that the rotating tray rotates clockwise to be in a vertical state or the rotating tray is reset under the action of the reset balance weight part. In the transportation and installation process of the steel truss pieces which are longitudinally segmented and transversely segmented, the structure solves the problems that the oversized and ultrahigh steel truss pieces avoid height limitation in a lying state and are convenient to hoist in an overturning state, the working efficiency is improved, and the safety is enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of steel truss construction of bridges, and in particular to a steel truss turning frame placed on a transport ship and a steel truss turning method. Background Art

[0002] In recent years, with the rapid economic growth, infrastructure construction has developed rapidly, especially in the field of transportation construction. The number of large-scale cross-river and cross-river bridges has increased. As local governments are considering saving land resources and reducing bridge construction budgets, more and more highway and railway combined bridges or double-deck highway bridges are being used. Therefore, there have been major changes in the load and span directions. Most of them use steel trusses with high rigidity and light weight as the main beam structure. There are also cases where the span and height of newly built bridges exceed those of existing bridges. The above situation puts forward higher requirements on the steel truss rod transport hull, waterway grade, navigation locks, and the navigation height limit of existing bridges.

[0003] Steel trusses are very high, and when transported in sections, they sometimes exceed the height limit of existing bridges. In order to solve the problem of height limit affecting the transportation of steel beam sections, the main trusses are first divided into sections longitudinally and then into blocks horizontally to reduce the width of the super-high components. The blocks are then transported in a flat manner, passing through the existing height-limited bridges, and then flipped to restore the upright state after reaching the bridge position.

[0004] In view of the limited navigation clearance and the need to turn over when lying flat, it is necessary to study a fast, safe and convenient steel beam truss transportation auxiliary structure. Summary of the invention

[0005] The embodiments of the present application provide a steel beam truss turning frame and a steel beam truss turning method placed on a transport ship to solve the problem that the steel trusses that are longitudinally segmented and transversely blocked have an oversized or overhigh structure, are difficult to avoid height restrictions during transportation, and are inconvenient to turn over before lifting.

[0006] In the first aspect, a steel beam truss turning frame placed on a transport ship hull is provided, which includes: a support assembly; a rotating pallet, a middle part of which is hinged to the top of the support assembly; a reset counterweight is provided at one end of the rotating pallet, and connecting parts are provided on both sides of the other end; a driving assembly, which is respectively connected to the connecting parts through a traction rope and is used to reel in or release the traction rope to rotate the rotating pallet clockwise to a vertical state or to reset the rotating pallet under the action of the reset counterweight.

[0007] In some embodiments, the support assembly includes a pad beam, a base is fixed on the top of the pad beam; the pad beam includes a distribution beam and a pad shoe; the two pad shoes are arranged at intervals, the distribution beam connects the two pad shoes, and the base is laterally fixed to the top of the distribution beam.

[0008] In some embodiments, the base includes an upper base, a support member and a lower base; the lower base is transversely fixed to the top of the distribution beam, the upper base is transversely arranged directly above the lower base, and the lower base and the upper base are fixedly connected by the support member.

[0009] In some embodiments, two spaced-apart hinged supports are provided at one end of the upper base; the rotating tray is located between the two hinged supports, and a hinged portion is provided in the middle of its two long sides, and the two hinged portions are respectively hinged to the two hinged supports through pins.

[0010] In some embodiments, the driving assembly includes a balancing pulley, two winches, two fixed pulleys and two movable pulleys; the two winches are respectively arranged on both sides of the cushion beam, the two fixed pulleys are respectively arranged on both sides of the lower base, the balancing pulley is arranged in the middle of the line connecting the two fixed pulleys, the two movable pulleys are respectively connected to the connecting parts, and the winches, fixed pulleys, movable pulleys and balancing pulleys are correspondingly connected through traction ropes.

[0011] In some embodiments, a locking assembly is also included, which includes a kick rod, a kick seat and a nut; the two kick rods are respectively fixed on both sides of the width direction of the rotating pallet and are located at one end close to the resetting counterweight; screw holes are provided on the top of the kick rod and the kick seat, and the nut is inserted into the screw hole of the kick rod through the screw hole of the kick seat to hold the upper chord of the steel beam truss against the rotating pallet.

[0012] In some embodiments, a weight carrier is provided at the bottom of one end of the rotating tray away from the connecting portion; and a plurality of reset weight members are provided in the weight carrier.

[0013] In some embodiments, a chord support is provided on one end of the rotating tray close to the connection portion, and the chord support is in contact with one end of the upper chord of the steel beam truss close to the diagonal rod.

[0014] In some embodiments, a clamping groove is provided on a side of the chord support member that contacts the upper chord; an end of the upper chord close to the diagonal rod is inserted into the clamping groove.

[0015] On the second aspect, a method for constructing a steel beam truss turning frame is provided, which includes: placing the steel beam truss on a rotating pallet in a horizontal state, fixing the steel beam truss with a locking assembly, and pressing one end of the upper chord rod close to the diagonal rod against a slot of the chord rod support; arranging and starting a driving assembly, driving the rotating pallet to rotate the steel beam truss to a vertical state, and after the lifting device is connected to the steel beam truss, releasing the locking assembly and releasing the slot of the chord rod support to lift the steel beam truss; and starting the driving assembly in reverse, so that the rotating pallet rotates in the opposite direction to a horizontal state under the action of the gravity of the reset counterweight.

[0016] The beneficial effects of the technical solution provided by this application include:

[0017] The embodiment of the present application provides a steel beam truss turning frame and a steel beam truss turning method, wherein the support assembly provides a stable support foundation for the entire device to ensure the stability of the entire turning frame, and uses high-strength materials to bear the weight of the steel beam truss and the load during the turning process; the rotating tray is specially designed to place the steel beam truss, and is hinged to the support assembly through a hinge, so that the rotating tray can rotate freely between a vertical and a horizontal state around the hinge point, and the design of the reset counterweight can use gravity to help the tray return to its initial state. The connecting parts on both sides of the rotating tray are closely connected to the driving assembly to provide sufficient external force for the rotation of the rotating tray, and the rotating tray can be turned over quickly and effectively by winding or releasing the traction rope. This structure can solve some inconveniences in the traditional method in the installation and transportation of the steel beam truss, improve work efficiency, and enhance safety, and solve the problem of the steel truss with longitudinal segmentation and transverse block, which has an oversized or overhigh structure, and the difficulty of avoiding height restrictions during transportation and the inconvenience of turning over before lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of the side structure of the turning frame provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the front structure of the turning frame provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the structure of the turning frame in the turning state provided in the embodiment of the present application;

[0022] Figure 4 A schematic diagram of hoisting steel beam trusses after the turning frame provided in the embodiment of the present application is in a vertical state;

[0023] Figure 5 A flow chart of a method for turning over a steel beam truss placed on a transport ship provided in an embodiment of the present application.

[0024] In the figure: 1. steel beam truss; 2. support assembly; 21. cushion beam; 22. base; 3. rotating tray; 31. hinged part; 4. reset counterweight; 5. drive assembly; 51. winch; 52. fixed pulley; 53. movable pulley; 6. hinged support; 7. pin shaft; 8. locking assembly; 81. anti-lock rod; 82. anti-lock seat; 9. chord support; 10. counterweight carrier; 11. wire rope. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0026] The embodiments of the present application provide a steel beam truss turning frame structure and a steel beam truss turning method, which can solve the problems of longitudinally segmented and transversely blocked steel trusses, which have an oversized or overhigh structure, difficulty in avoiding height restrictions during transportation, and inconvenience in turning over before lifting.

[0027] When the steel truss is high and is transported in sections, it may exceed the height limit of the existing bridge. When the steel truss reaches the target construction section, it needs to be flipped to a vertical state for lifting. It is necessary to take measures to reduce the width of the super-high component by first dividing the main truss longitudinally and then dividing it horizontally into blocks, and then transport it in a flat manner, passing through the existing limited height bridge, and then flip it to restore the upright state after reaching the bridge position. A fast, safe and convenient truss transportation auxiliary structure is designed. This structure can be installed on a transport ship, and the flipping system can provide a large vertical bearing capacity, so that the truss can keep lying flat, taking into account the flipping function of the truss and the pallet, ensuring the safety and practicality of transporting and flipping the beam body; no large-scale rotating special mechanical equipment is required, reducing the mechanical investment during the beam transportation period; it can provide a certain limit and anti-overturning capacity for the flipped beam body, and has strong versatility and adaptability. Thus, the problem of the main truss being divided longitudinally and then divided horizontally into blocks in the prior art to reduce the inconvenience of turning over the super-large or super-high steel truss during transportation is solved, and the longitudinal segmentation is converted to the horizontal block.

[0028] refer to Figure 1-4 A steel beam truss turning frame structure includes: a support assembly 2; a rotating tray 3, the middle part of which is hinged to the top of the support assembly 2; a reset counterweight 4 is provided at one end of the rotating tray 3, and connecting parts are provided on both sides of the other end; a driving assembly 5, which is connected to the connecting parts through a traction rope, and is used to reel in or release the traction rope, so that the rotating tray 3 rotates clockwise to a vertical state or resets the rotating tray 3 under the action of the reset counterweight 4.

[0029] Through this structural design, the support assembly 2 provides a stable support foundation for the entire device, ensuring the stability of the entire turning frame, and adopts high-strength materials to bear the weight of the steel beam truss 1 and the load during the turning process; the rotating tray 3 is specially designed to place the steel beam truss 1, and is hinged with the support assembly 2 through a hinge, so that the rotating tray 3 can rotate freely between the vertical and horizontal states around the hinge point, and the design of the reset counterweight 4 can use gravity to help the rotating tray 3 return to the horizontal state. The connecting parts on both sides of the rotating tray 3 are closely connected with the driving assembly 5, providing sufficient external force for the rotation of the rotating tray 3, and the rotating tray 3 can be turned over quickly and effectively by winding or releasing the traction rope. This structure can solve some inconveniences in the traditional method during the installation and transportation of the steel beam truss 1, improve work efficiency, and enhance safety, as well as the problem that the main truss is first divided into longitudinal sections and then divided into horizontal blocks in the prior art to reduce the inconvenience of turning over the oversized or over-high steel trusses during transportation, and the problem of converting from longitudinal sections to horizontal blocks.

[0030] In some preferred embodiments, the support assembly 2 includes a pad beam 21, and a base 22 is fixed on the top of the pad beam 21; the pad beam 21 includes a distribution beam and a pad shoe; the two pad shoes are arranged at intervals, the distribution beam connects the two pad shoes, and the base 22 is laterally fixed to the top of the distribution beam.

[0031] Through this structural design, the main function of the cushion beam 21 is to transfer the deadweight of all the structures above it to the transport hull; and the base 22 is fixed to the top of the cushion beam 21. It is an important force transmission component and is integrally formed with the cushion beam 21, which enhances the compressive resistance and stability of the overall support system. The distribution beam is arranged on the deck of the transport ship, which can evenly distribute the load on the steel beam truss 1 supported by it and reduce the impact of local stress concentration on the hull. The two pads are arranged on the deck of the transport ship at intervals to support the distribution beam. The design of the pads should take into account the shape and material of the hull to ensure good fit and stability. The distribution beam fixes the two pads by connecting them with cross braces to ensure overall stability. The base is laterally fixed to the top of the distribution beam to provide a hinged foundation for rotating the tray 3.

[0032] In some preferred embodiments, the base 22 includes an upper base, a support member and a lower base; the lower base is transversely fixed to the top of the distribution beam, the upper base is transversely arranged directly above the lower base, and the lower base and the upper base are fixedly connected by the support member.

[0033] In this embodiment, the lower base is transversely fixed to the top of the distribution beam to play a supporting role; the upper base is transversely arranged directly above the lower base, and is mainly used to carry the rotating tray 3 and the steel beam truss 1 thereon. The shape and size of the upper base should ensure that it is sufficient to cover the lower base and provide a stable foundation for the rotation mechanism; the support member should have sufficient strength and rigidity to achieve a fixed support connection between the lower base and the upper base. The upper and lower bases form a solid support system through the design of the support members, which effectively prevents the relative displacement between the components and improves the stability of the overall structure. The structural design of the base enables the steel beam truss 1 to evenly distribute the gravity when turning over at any angle, ensuring the safety of the hull.

[0034] In some preferred embodiments, two spaced-apart hinged supports 6 are provided at one end of the upper base; the rotating tray 3 is located between the two hinged supports 6, and a hinged portion 31 is provided in the middle of its two long sides, and the two hinged portions 31 are respectively hinged to the two hinged supports 6 through pins 7.

[0035] In this embodiment, two spaced hinge supports 6 are provided at one end of the upper base, and the two hinge supports support the flipping of the rotating tray 3 by providing a rotation axis; the pins 7 are respectively provided at the two hinged parts 31 and are respectively hinged to the two hinge supports 6, so that the rotating tray 3 can rotate smoothly around the pins 7; the rotating tray 3 is located between the two hinge supports 6, so that its center position is balanced. The rotating tray 3 relies on the support of the hinge supports 6 and realizes rotation through a fixed hinge point.

[0036] In some preferred embodiments, the driving assembly 5 includes a balancing pulley, two winches 51, two fixed pulleys 52 and two movable pulleys 53; the two winches 51 are respectively arranged on both sides of the cushion beam 21, the two fixed pulleys 52 are respectively arranged on both sides of the lower base, the balancing pulley is arranged in the middle of the line connecting the two fixed pulleys 52, the two movable pulleys 53 are respectively connected to the connecting parts, and the winches 51, the fixed pulleys 52, the movable pulleys 53 and the balancing pulleys are correspondingly connected through a traction rope.

[0037] Through this structural design, the winch 51 serves as the core power source for the rotation drive. The winch 51 on one side is responsible for winding and releasing the traction rope, and the rotation operation is realized by the motor drive; the fixed pulley 52 on the same side is connected to the winch 51, fixed at the bottom of the lower base, and is responsible for guiding the movement path of the traction rope. One of the movable pulleys 53 is connected to the connecting part on the same side. The coordinated use of the winch on the other side ensures the balance and power distribution of the turning frame. The fixed pulley 52 on the other side is symmetrically fixed on the other side of the lower base, responsible for guiding the operation of the traction rope connected to the winch 51 on this side, and the movable pulley 53 on this side is connected to another corresponding connecting part, and forms a symmetrical drive with the movable pulley 53 on the other side. The balancing pulley is arranged at the bottom of the lower base, located at the center axis position of the two fixed pulleys 52. The function of the balancing pulley is to reduce the lateral deviation of the traction rope during the hoisting process, and ensure that the rotating tray 3 always maintains balance during rotation. The coordination of the traction rope, the winch 51, and the pulley system can effectively realize the rotation of the rotating tray 3, forming a closed-loop power transmission system. The design of the entire structure not only ensures the smoothness of operation, but also enhances the stability of the system.

[0038] In some preferred embodiments, a locking assembly 8 is also included, which includes a reverse lock rod 81, a reverse lock seat 82 and a nut; the two reverse lock rods 81 are respectively fixed on both sides of the width direction of the rotating tray 3, and are located at one end close to the reset counterweight 4; screw holes are provided on the top of the reverse lock rod 81 and the reverse lock seat 82, and the nut is inserted into the screw hole of the reverse lock rod 81 through the screw hole of the reverse lock seat 82, so as to hold the upper chord of the steel beam truss 1 against the rotating tray 3.

[0039] Through this structural design, the reverse buckle seat 82 is detachably connected to the two reverse buckle rods 81, and its screw hole design is simple and effective, and can be quickly matched with the nut. The nut is inserted into the screw hole of the reverse buckle rod 81 through the screw hole of the reverse buckle seat 82 to resist the steel beam truss 1 located below it, thereby realizing the locking function. Such a design ensures the fixing force during operation, can resist the upper chord of the steel beam truss 1, and effectively prevent any accidental displacement. This component ensures that the steel beam truss 1 will not slide or tilt during the rotation process by providing a solid longitudinal support, thereby achieving a stable fixing effect.

[0040] In some preferred embodiments, a counterweight carrier 10 is provided at the bottom of one end of the rotating tray 3 away from the connecting portion; and a plurality of reset counterweight members 4 are provided in the counterweight carrier 10 .

[0041] Through this structural design, multiple reset counterweights 4 are arranged in the counterweight carrier 10, which can be flexibly added or reduced as needed, and multiple reset counterweights 4 that are suitable for the weight of the steel beam truss 1 are placed to achieve a smooth reset effect. This modular design enables the counterweight system to be adjusted according to the load requirements in different working scenarios, increasing the flexibility of use.

[0042] In some preferred embodiments, a chord support 9 is provided on one end of the rotating tray 3 close to the connection portion, and the chord support 9 contacts one end of the upper chord of the steel beam truss 1 close to the diagonal rod.

[0043] Through this structural design, when the rotating pallet 3 rotates to a vertical state, in order to prevent the steel beam truss 1 from falling off, a chord support 9 is provided at the end that contacts the upper chord of the steel beam truss 1. It is intended to provide effective support for the steel beam truss 1. The width of the chord support 9 should be designed according to the actual size of the steel beam truss 1 to ensure that the steel beam truss 1 can be effectively restrained. The chord support 9 can be made of corrosion-resistant materials to adapt to the marine environment during transportation and increase its durability and stability. It should be noted that the design should ensure that the chord support 9 does not hinder other operations when the rotating pallet 3 rotates, and can quickly provide support when needed.

[0044] In some preferred embodiments, a clamping groove is provided on a side of the chord support member 9 that contacts the upper chord; an end of the upper chord close to the diagonal rod is inserted into the clamping groove.

[0045] In this embodiment, the design of the snap-in slot can facilitate the transportation and placement of the upper chord to reduce its horizontal swing, and can also cooperate with the locking assembly 8 to better temporarily fix the steel beam truss 1 to reduce the impact of vibration and displacement.

[0046] The present application embodiment provides a method for turning over a steel beam truss, referring to Figure 5 , Figure 5 The flow chart of the method for turning over the steel beam truss is as follows: Figure 5 As shown, the method for turning over the steel beam truss includes:

[0047] Step 101, place the steel beam truss 1 on the rotating pallet 3 in a horizontal state, fix the steel beam truss 1 with the locking assembly 8, and press the end of the upper chord rod close to the diagonal rod against the slot of the chord rod support 9; this step is the initial placement of the steel beam truss 1, adjust the turning frame to a horizontal state, hoist and place it horizontally on the turning frame, and fix the steel beam truss 1 with the locking assembly 8 and the slot of the chord rod support 9, and then it can be transported.

[0048] Step 102, arrange and start the driving component 5, drive the rotating pallet 3 to rotate the steel beam truss 1 to a vertical state, and after the hoist is connected to the steel beam truss 1, release the locking component 8 and lift the steel beam truss 1; through this step, after the transportation of the steel beam truss 1 is realized, the steel beam truss 1 needs to be processed to a vertical state to cooperate with the crane for lifting, and the driving component 5 is used to provide rotational power to adjust the rotating pallet 3 carrying the steel beam truss 1 to a vertical state. The locking device between the fixed pulleys 52 fixes the rotating pallet 3 in the vertical state. After the crane uses the hoist to connect the steel beam truss 1, the locking component 8 is released and the slot of the chord support 9 is released to complete the lifting.

[0049] Step 103, reversely start the driving assembly 5, and the rotating tray 3 rotates in the opposite direction to a horizontal state under the gravity of the reset counterweight 4. Through this step, under the reverse driving action of the driving assembly 5, the rotating tray 3 will slowly rotate in the opposite direction under the gravity of the reset counterweight 4. The rotating tray 3 is safely and effectively reset to a horizontal state, and the transportation work of the next steel beam truss 1 can be carried out.

[0050] The beneficial effects brought by the present invention include:

[0051] The support assembly 2 provides a stable support foundation for the entire device, ensuring the stability of the entire turning frame, and adopts high-strength materials to bear the weight of the steel beam truss 1 and the load during the turning process; the rotating tray 3 is specially designed to place the steel beam truss 1, and is hinged to the support assembly 2 through a hinge, so that the rotating tray 3 can rotate freely between the vertical and horizontal states around the hinge point, and the design of the reset counterweight 4 can use gravity to help the rotating tray 3 return to the horizontal state. The connecting parts on both sides of the rotating tray 3 are closely connected with the driving assembly 5, providing sufficient external force for the rotation of the rotating tray 3, and the rotating tray 3 can be turned over quickly and effectively by winding or releasing the traction rope. This structure can solve some inconveniences in the traditional method in the installation and transportation of the steel beam truss 1, improve work efficiency, and enhance safety, and solve the problem of the steel truss with longitudinal segmentation and transverse block, which has an oversized or overhigh structure, and the difficulty of avoiding height restrictions during transportation and the inconvenience of turning over before lifting.

[0052] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0053] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0054] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A steel beam truss turning frame structure, characterized in that: It includes: Support assembly (2); A rotating tray (3), the middle of which is hinged to the top of the supporting assembly (2); a resetting counterweight (4) is provided at one end of the rotating tray (3), and connecting parts are provided on both sides of the other end; A driving assembly (5) is connected to the connecting parts respectively via a traction rope and is used to reel in or unroll the traction rope to rotate the rotating tray (3) clockwise to a vertical state or to reset the rotating tray (3) under the action of the reset counterweight (4).

2. The steel beam truss turning frame structure according to claim 1, characterized in that: The support assembly (2) comprises a cushion beam (21), and a base (22) is fixedly provided on the top of the cushion beam (21); The pad beam (21) comprises a distribution beam and a pad shoe; the two pad shoes are arranged at an interval, the distribution beam connects the two pad shoes, and the base (22) is transversely fixed to the top end of the distribution beam.

3. The steel beam truss turning frame structure according to claim 2, characterized in that: The base (22) comprises an upper base, a support member and a lower base; The lower base is transversely fixed to the top end of the distribution beam, the upper base is transversely arranged just above the lower base, and the lower base is fixedly connected to the upper base through the support member.

4. The steel beam truss turning frame structure according to claim 3, characterized in that: One end of the upper base is provided with two hinged supports (6) arranged at intervals; The rotating tray (3) is located between the two hinged supports (6), and a hinged portion (31) is provided in the middle of the two long sides thereof. The two hinged portions (31) are respectively hinged to the two hinged supports (6) via pins (7).

5. The steel beam truss turning frame structure according to claim 4, characterized in that: The driving assembly (5) comprises a balancing pulley, two winches (51), two fixed pulleys (52) and two movable pulleys (53); The two hoists (51) are respectively arranged on both sides of the cushion beam (21), the two fixed pulleys (52) are respectively arranged on both sides of the lower base, the balancing pulley is arranged in the middle of the line connecting the two fixed pulleys (52), the two movable pulleys (53) are respectively connected to the connecting parts, and the hoists (51), the fixed pulleys (52), the movable pulleys (53) and the balancing pulleys are respectively connected to each other through the traction rope.

6. The steel beam truss turning frame structure according to claim 1, characterized in that: Also included is a locking assembly (8), which includes a buckle rod (81), a buckle seat (82) and a nut; The two reverse levers (81) are respectively fixedly arranged on both sides of the width direction of the rotating tray (3) and are located at one end close to the resetting counterweight (4); screw holes are arranged on the top of the reverse lever (81) and the reverse seat (82); the nut is inserted into the screw hole of the reverse lever (81) through the screw hole of the reverse seat (82) to hold the upper chord of the steel beam truss (1) against the rotating tray (3).

7. The steel beam truss turning frame structure according to claim 1, characterized in that: A counterweight carrier (10) is provided at the bottom of one end of the rotating tray (3) away from the connecting portion; a plurality of resetting counterweight members (4) are arranged in the counterweight carrier (10).

8. The steel beam truss turning frame structure according to claim 1, characterized in that: A chord support member (9) is provided on one end of the rotating tray (3) close to the connecting portion, and is in contact with one end of the upper chord of the steel beam truss (1) close to the diagonal rod.

9. The steel beam truss turning frame structure according to claim 8, characterized in that: A clamping groove is provided on a side of the chord support member (9) that contacts the upper chord; One end of the upper chord rod close to the oblique rod is inserted into the clamping groove.

10. A method for constructing a steel beam truss turning frame, characterized in that: It includes: Providing a steel beam truss turning frame structure as described in any one of claims 1 to 9; The steel beam truss piece (1) is placed on the rotating tray (3) in a horizontal state, the locking assembly (8) fixes the steel beam truss piece (1), and the end of the upper chord rod close to the diagonal rod is pressed against the clamping groove of the chord rod support member (9); Arrange and start the driving assembly (5), drive the rotating tray (3) to rotate the steel beam truss (1) to a vertical state, and after the lifting device is connected to the steel beam truss (1), release the locking assembly (8) and release the slot of the chord support (9), so as to lift the steel beam truss (1); The driving assembly (5) is started in the reverse direction, and the rotating tray (3) rotates in the reverse direction to a horizontal state under the action of the gravity of the resetting counterweight (4).

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