A hoisting and lifting device for steel-concrete composite sections and its working method

Abstract

This invention discloses a lifting and hoisting device and its working method for steel-concrete composite sections, including a hoisting vehicle and a telescopic boom mounted thereon, as well as first and second winding mechanisms. The first winding mechanism is connected to a hoisting head mechanism via a third steel cable for lifting and hoisting the steel-concrete composite section. The hoisting head mechanism includes a steel trough body with an inner groove on its bottom surface facing upwards. Stacking rods are rotatably connected to both sides of the bottom of the inner groove. This device utilizes the fact that the stacking rods can be retracted into the inner groove, successfully achieving convenient and flexible stable hoisting of the steel-concrete composite section even when there are obstructions above the target installation location. At the same time, the steel-concrete composite section can be fixed to both sides of the stacking rods by mounting rods, and the steel-concrete composite section can act as a counterweight, which not only makes the steel trough body more stable during hoisting or the stacking rods more stable when unfolded, but also improves the hoisting efficiency of the steel-concrete composite section and saves energy consumption during the hoisting process.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, specifically to a lifting and hoisting device for steel-concrete composite sections and its working method. Background Technology

[0002] Steel-concrete composite sections are a type of precast bridge deck that is widely used in bridge construction. The installation of steel-concrete composite sections using lifting equipment is an important step in bridge construction.

[0003] Currently, under normal circumstances, the steel-concrete composite section is connected to the pre-embedded lifting blocks by steel cables, and the other end of the steel cables is hung on the lifting hook of the lifting equipment. The steel-concrete composite section is then directly lifted to the designed installation position by the lifting equipment.

[0004] However, gantry frames and other structures are often installed above the designed installation location of the steel-concrete composite section. Removing these structures would not only increase labor intensity, but also require the reinstallation of gantry frames and other structures after the steel-concrete composite section is hoisted to the designed installation location to assist in its further installation. Therefore, current lifting equipment is unable to directly hoist the steel-concrete composite section when the space above the designed installation location is restricted, resulting in low hoisting efficiency, limited application scenarios, and unsuitability for widespread use. Summary of the Invention

[0005] The purpose of this invention is to provide a lifting and hoisting device for steel-concrete composite sections and its working method, so as to solve the problems mentioned in the background art.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A lifting and hoisting device for steel-concrete composite sections includes a hoisting vehicle and a telescopic boom mounted thereon, and also includes a first winding mechanism and a second winding mechanism. The first winding mechanism is connected to a hoisting head mechanism via a third steel cable, and is used for lifting and hoisting steel-concrete composite sections.

[0008] The lifting head mechanism includes a steel trough body with an inner groove on the bottom surface facing upwards. Stacking rods are rotatably connected to both sides of the bottom of the inner groove. Connecting lifting lugs are fixedly connected to both sides of the inner top surface of the inner groove. Top mounting blocks are provided on both sides of the top surface of the steel trough body. A top rotating shaft is fixedly connected between the two top mounting blocks. A first pulley is rotatably connected to the middle section of the top rotating shaft. Two bottom through-holes extending to the top surface of the steel trough body are symmetrically opened on the inner top surface of the inner groove. A top through-hole is provided directly above the bottom through-holes on the top rotating shaft.

[0009] The end of the stacked rod away from the bottom of the inner tank is rotatably connected to a second pulley, and the bottom surface of the stacked rod is fixedly connected to several mounting rods for connecting the steel-concrete composite section;

[0010] The two connecting lugs are detachably connected to a first steel cable and a second steel cable, respectively. The first steel cable and the second steel cable pass through the second pulleys on the two stacked rods and then pass through the bottom opening and the top opening, and are finally wound up by the second winding mechanism.

[0011] The top of the telescopic arm is provided with a second fixed pulley, and one end of the third steel cable is fixedly connected to the telescopic arm. The third steel cable passes through the first pulley and the second fixed pulley and is wound up by the first winding mechanism.

[0012] Preferably, both the first and second winding mechanisms are mounted on the telescopic arm. Each mechanism includes a first drum and a first servo motor. The top of the telescopic arm is also provided with a first fixed pulley and a third fixed pulley. The first and second steel cables are wound by the second winding mechanism after passing through the first and third fixed pulleys, respectively. The rotation of the output end of the first servo motor in the first winding mechanism drives the corresponding first drum to rotate, thereby winding the third steel cable to lift the steel trough. The rotation of the output end of the first servo motor in the second winding mechanism drives the corresponding first drum to rotate, thereby simultaneously winding the first and second steel cables to pull the two stacked rods into the inner trough.

[0013] Preferably, the first winding mechanism includes a first drum and a first servo motor mounted on the telescopic arm. The rotation of the output end of the first servo motor drives the first drum to rotate, thereby winding the third steel cable passing through the first pulley and the second fixed pulley. The second winding mechanism includes a top steel plate mounted on the top surface of the top mounting block. A second servo motor is mounted on the outer wall of the top steel plate. The output end of the second servo motor is fixedly connected to a connecting shaft. A second drum is sleeved on the connecting shaft. The rotation of the output end of the second servo motor drives the connecting shaft and the second drum to rotate, thereby simultaneously winding the first steel cable and the second steel cable passing through the bottom opening and the top opening.

[0014] Preferably, the lower inner wall of the inner groove is symmetrically provided with bottom rotating shafts, and the end of the stacked rod near the bottom of the steel groove is provided with a rotating opening, and the bottom rotating shaft is placed in the rotating opening.

[0015] Preferably, the end of the stacked rod away from the bottom of the steel trough has an end slot, and a steel shaft is installed in the end slot. The second pulley is rotatably connected to the steel shaft. The middle section of the stacked rod has a through-hole, and the bottom of the through-hole has several fixing holes. The middle section of the mounting rod has a bottom fixing hole. The stacked rod and the mounting rod are fixedly connected by fasteners, bottom fixing holes, and fixing holes. The fasteners include secondary bolts and secondary nuts. The secondary bolts pass through the bottom fixing holes and fixing holes from the bottom of the mounting rod and enter the through-hole. The secondary nuts are threadedly connected to the secondary bolts in the through-hole to fasten the stacked rod and the mounting rod.

[0016] Preferably, both ends of the mounting rod are provided with mounting openings, and the top surface of the steel-concrete composite section is pre-set with a plurality of threaded rods. The threaded rods are threadedly connected to fastening nuts. The threaded rods pass through the mounting openings from the bottom surface of the mounting rod, and the fastening nuts are threadedly connected to the threaded rods on the top surface of the mounting rod to fix the steel-concrete composite section on the mounting rod.

[0017] A working method for a lifting and hoisting device for steel-concrete composite sections includes the following steps: Step 1: Fix two steel-concrete composite sections to the bottom surfaces of mounting rods on both sides of the steel trough body using threaded rods and fastening nuts; Step 2: Start the first or second servo motor controlling the winding of the first and second steel cables to retract the stacked rods on both sides of the steel trough body into the inner trough; Step 3: Start the hoisting vehicle and telescopic boom, and in conjunction with starting the first servo motor controlling the winding of the third steel cable, lift the steel trough body and lower it from the gap in the obstruction (gantry) towards the target position (designed installation position); Step 4: After the steel trough body passes through the gap in the obstruction (gantry), start the first servo motor controlling the winding of the first and second steel cables... Step 5: Install the steel-concrete composite section located directly above the target position (designed installation position), and gradually remove the fastening nuts from the threaded rods. Remove the other steel-concrete composite section located on the bridge deck from the mounting rod. Step 6: Retract the stacked rods on both sides of the steel trough into the inner trough and return along the same path. Repeat the above operations. After each two installations of the steel-concrete composite section, two steel-concrete composite sections will remain on the bridge deck. These can be installed on the mounting rods on both sides of the steel trough. Hoist one of the steel-concrete composite sections to the next target position (designed installation position).

[0018] The beneficial effects of this invention are as follows: This equipment, through the arrangement of stacking rods, a first steel cable, and first and second winding mechanisms, utilizes the fact that the stacking rods can be retracted into the inner trough, reducing the space required for the steel trough to carry the steel-concrete composite section through the obstruction gantry. Furthermore, the unfolding of the stacking rods allows the steel-concrete composite section to be placed at the target position, successfully achieving convenient and flexible stable hoisting of the steel-concrete composite section even when there is an obstruction gantry above the target position. Simultaneously, steel-concrete composite sections can be fixed to both sides of the stacking rods via mounting rods, utilizing the steel-concrete composite section as counterweights. This not only makes the steel trough more stable during hoisting or when the stacking rods are unfolded, but also improves the hoisting efficiency by hoisting two steel-concrete composite sections at a time, eliminating the need for separate counterweights for back-and-forth hoisting and saving energy during the hoisting process. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the lifting head mechanism in this invention;

[0022] Figure 3 This is a schematic diagram of the folded state of the hoisting head mechanism in this invention;

[0023] Figure 4 This is a structural schematic diagram of the hoisting head mechanism in its deployed state in this invention;

[0024] Figure 5 This is a schematic diagram of the stacked rods and mounting rods in this invention;

[0025] Figure 6 This is a cross-sectional view of the lifting head mechanism in this invention;

[0026] Figure 7 This is a schematic diagram showing the connection between the second winding mechanism and the lifting head mechanism in this invention;

[0027] Figure 8 This is a schematic diagram showing the connection between the first steel cable, the second steel cable, the third steel cable, and the lifting head mechanism in this invention;

[0028] Figure 9 yes Figure 8 Enlarged diagram of point A in the middle.

[0029] In the diagram: 1. Steel trough; 101. Inner trough; 102. Bottom pivot; 103. Connecting lug; 104. Top mounting block; 105. Top pivot; 106. First pulley; 107. Bottom through-hole; 108. Top through-hole; 2. Stacked rod; 201. End slot opening; 202. Second pulley; 203. Steel shaft; 204. Through-hole; 205. Fixing opening; 206. Rotating opening; 3. Mounting rod; 301. Mounting opening; 302. Bottom fixing opening; 30 3. Fasteners; 4. Steel-concrete composite section; 401. Threaded rod; 402. Fastening nut; 5. First steel cable; 501. Second steel cable; 6. Third steel cable; 7. Crane; 701. Telescopic boom; 702. First drum; 703. First servo motor; 704. First fixed pulley; 705. Second fixed pulley; 706. Third fixed pulley; 8. Top steel plate; 801. Second servo motor; 802. Connecting shaft; 803. Second drum. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Reference Figure 1-9 As shown, the present invention is a lifting and hoisting device for steel-concrete composite sections, including a hoisting vehicle 7 and a telescopic boom 701 mounted thereon, and also includes a first winding mechanism and a second winding mechanism. The first winding mechanism is connected to a hoisting head mechanism via a third steel cable 6, and is used for lifting and hoisting the steel-concrete composite section 4. The hoisting vehicle 7 and the telescopic boom 701 are existing technologies in the field and will not be described in detail here.

[0032] Reference Figure 2 As shown, the lifting head mechanism includes a steel trough 1. An inner trough 101 is formed on the bottom surface of the steel trough 1, with stacked rods 2 rotatably connected to both sides of the bottom of the inner trough 101. Connecting lugs 103 are fixedly connected to both sides of the inner top surface of the inner trough 101. Top mounting blocks 104 are provided on both sides of the top surface of the steel trough 1. A top rotating shaft 105 is fixedly connected between the two top mounting blocks 104. A first pulley 106 is rotatably connected to the middle section of the top rotating shaft 105. Two bottom through-holes 107 are symmetrically formed on the inner top surface of the inner trough 101, extending to the top surface of the steel trough 1. A top through-hole 108 is formed directly above each bottom through-hole 107 on the top rotating shaft 105. (Refer to...) Figure 6 As shown, there are two top openings 108, located on both sides of the first pulley 106.

[0033] Reference Figure 4 As shown, further, a second pulley 202 is rotatably connected to one end of the stacked rod 2 away from the bottom of the inner groove 101, and several mounting rods 3 are fixedly connected to the bottom surface of the stacked rod 2 for connecting the steel-concrete composite section 4.

[0034] Reference Figure 8 As shown, furthermore, the two connecting lugs 103 are detachably connected to the first steel cable 5 and the second steel cable 501, respectively. It should be noted that the first steel cable 5 and the second steel cable 501 can be fixed to the connecting lugs 103 by bolting. The connecting lugs 103 are as follows... Figure 3 As shown, the first steel cable 5 and the second steel cable 501 pass through the second pulleys 202 on the two stacked rods 2 respectively, and then pass through the bottom through hole 107 and the top through hole 108 and are finally wound up by the second winding mechanism, including unwinding.

[0035] Furthermore, a second fixed pulley 705 is provided at the top of the telescopic arm 701, and one end of the third steel cable 6 is fixedly connected to the telescopic arm 701. After passing through the first pulley 106 and the second fixed pulley 705, the third steel cable 6 is wound up by the first winding mechanism, including unwinding.

[0036] This equipment, through the arrangement of stacking rods 2, first steel cables 5, and first and second winding mechanisms, utilizes the fact that stacking rods 2 can be retracted into the inner trough 101, reducing the space required for the steel trough 1 to carry the steel-concrete composite section 4 through the obstruction gantry. The unfolding of stacking rods 2 allows the steel-concrete composite section 4 to be placed at the target position, successfully achieving convenient and flexible stable hoisting of the steel-concrete composite section 4 even when there is an obstruction gantry above the target position. Simultaneously, steel-concrete composite sections 4 can be fixed to both sides of stacking rods 3, utilizing the steel-concrete composite section 4 as counterweights. This not only makes the steel trough 1 more stable during hoisting or when stacking rods 2 are unfolded, but also improves the hoisting efficiency by hoisting two steel-concrete composite sections 4 at a time, eliminating the need for separate counterweights for back-and-forth hoisting and saving energy during the hoisting process.

[0037] In an optional embodiment, both the first and second winding mechanisms are mounted on the telescopic arm 701, each including a first drum 702 and a first servo motor 703. The top of the telescopic arm 701 is also provided with a first fixed pulley 704 and a third fixed pulley 706. The first steel cable 5 and the second steel cable 501 are wound by the second winding mechanism after passing through the first fixed pulley 704 and the third fixed pulley 706 respectively. The rotation of the output end of the first servo motor 703 in the first winding mechanism drives the corresponding first drum 702 to rotate, so as to wind and unwind the third steel cable 6 to lift and lower the steel trough 1. The rotation of the output end of the first servo motor 703 in the second winding mechanism drives the corresponding first drum 702 to rotate, so as to simultaneously wind and unwind the first steel cable 5 and the second steel cable 501 to pull the two stacked rods 2 into and lower them into the inner groove 101.

[0038] By setting both the first and second winding mechanisms on the telescopic wall 701, unified control and convenient installation are facilitated.

[0039] In an optional embodiment, the first winding mechanism includes a first drum 702 and a first servo motor 703 mounted on the telescopic arm 701. Rotation of the output end of the first servo motor 703 drives the first drum 702 to rotate, thereby winding and unwinding the third steel cable 6 passing through the first pulley 106 and the second fixed pulley 705. (Refer to...) Figure 7 As shown, the second winding mechanism includes a top steel plate 8 disposed on the top surface of the top mounting block 104. There are two top steel plates 8, and a second servo motor 801 is disposed on the outer side wall of each top steel plate 8. The output end of the second servo motor 801 is fixedly connected to a connecting shaft 802. The connecting shaft 802 passes through the top steel plate 8, and a second drum 803 is sleeved on the connecting shaft 802. The rotation of the output end of the second servo motor 801 drives the connecting shaft 802 and the second drum 803 to rotate, so as to simultaneously wind up and unwind the first steel cable 5 and the second steel cable 501 that pass through the bottom through-hole 107 and the top through-hole 108.

[0040] By setting the second winding mechanism on the top mounting block 104, the lengths of the first steel cable 5 and the second steel cable 501 are significantly shortened, avoiding mutual interference between the first steel cable 5, the second steel cable 501 and the third steel cable 6, thereby affecting the stability of the lifting and hoisting.

[0041] Reference Figure 4 and Figure 5 As shown, in an optional embodiment, the lower inner wall of the inner groove 101 is symmetrically provided with bottom rotating shafts 102, and the stacked rod 2 is provided with a rotating opening 206 at one end near the bottom of the steel groove 1, and the bottom rotating shafts 102 are placed in the rotating opening 206.

[0042] Reference Figure 5 As shown, in an optional embodiment, the end of the stacked rod 2 away from the bottom of the steel trough 1 has an end slot 201, and a steel shaft 203 is provided in the end slot 201. The second pulley 202 is rotatably connected to the steel shaft 203. The middle section of the stacked rod 2 has a through-hole 204, and the bottom of the through-hole 204 has several fixing holes 205. The middle section of the mounting rod 3 has a bottom fixing hole 302. The stacked rod 2 and the mounting rod 3 are fixedly connected by fasteners 303, the bottom fixing hole 302, and the fixing holes 205. The fasteners 303 include secondary bolts and secondary nuts. The secondary bolts pass through the bottom of the mounting rod 3 into the bottom fixing holes 302 and fixing holes 205 and into the through-hole 204. The secondary nuts are threadedly connected to the secondary bolts in the through-hole 204 to fasten the stacked rod 2 and the mounting rod 3. The through-hole 204 facilitates manual threading of the secondary nuts and secondary bolts, making the fastening operation of the stacked rod 2 and the mounting rod 3 more convenient.

[0043] Reference Figure 5 and Figure 8 , Figure 9 As shown, in an optional embodiment, mounting rod 3 has mounting openings 301 at both ends. A plurality of threaded rods 401 are pre-installed on the top surface of the steel-concrete composite section 4. Each threaded rod 401 is threadedly connected to a fastening nut 402. The threaded rods 401 pass through the mounting openings 301 from the bottom surface of the mounting rod 3. The fastening nut 402 is threadedly connected to the threaded rod 401 on the top surface of the mounting rod 3 to fix the steel-concrete composite section 4 onto the mounting rod 3. It should be noted that the mounting rod 3 is used to connect with the steel-concrete composite section... 4. Fixing: The steel-concrete composite section 4 is the object to be lifted and hoisted by this equipment. Several installation rods 3 are fixedly connected at equal intervals to the bottom surface of the stacked rods 2, and the stacked rods 2 are perpendicular to the installation rods 3. The stacked rods 2 are located in the middle section of the installation rods 3, so that when this equipment lifts and hoists the steel-concrete composite section 4, the stacked rods 2 are located in the middle section of the steel-concrete composite section 4, so that the weight on the front and rear sides of the stacked rods 2 is balanced and will not tilt. This makes it easy for the steel-concrete composite section 4 to be lifted and hoisted to the target position smoothly, and facilitates the installation of the steel-concrete composite section 4.

[0044] The working steps of this device will now be used to explain its functional principle: Refer to Figure 1 As shown, this equipment is used to hoist the steel-concrete composite section 4 from the gap of the obstruction (gantry, etc.) to the target position (designed installation position). The specific steps are as follows: First, the two steel-concrete composite sections 4 are fixed to the bottom surface of the mounting rods 3 on both sides of the steel trough body 1 by threaded rods 401 and fastening nuts 402. Then, the first servo motor 703 or the second servo motor 801 that controls the winding of the first steel cable 5 and the second steel cable 501 is started, thereby pulling the stacked rods 2 on both sides of the steel trough body 1 into the inner groove 101. (It should be noted that the first steel cable 5 or...) One end of the second steel cable 501 is fixed to the connecting lug 103, and the other end is set on the second winding mechanism. When the second winding mechanism is started, the first servo motor 703 or the second servo motor 801 starts to rotate forward or backward, driving the corresponding first drum 702 or second drum 803 to rotate forward or backward. The other end of the first steel cable 501 and the second steel cable 501 are fixed on the first drum 702 or the second drum 803, thereby realizing the winding or unwinding of the first steel cable 501 and the second steel cable 501. During this process, the first fixed pulley 704 and the third fixed pulley 705... Pulley 706 and the second pulley 202 are in a rotating state (this is existing technology and will not be elaborated further). Next, the hoisting vehicle 7 and the telescopic boom 701 are started. Based on the actual conditions of the construction site, the first servo motor 703, which controls the winding of the third steel cable 6, is activated to lift the steel trough 1 and lower it from the gap in the obstruction gantry towards the designed installation position (similarly, the winding or unwinding of the first steel cable 5 and the second steel cable 501 is also activated). Once the steel trough 1 has passed through the gap in the obstruction gantry, the first servo motor 703 controlling the winding of the first steel cable 5 and the second steel cable 501 is activated. Servo motor 703 or second servo motor 801 is rotated in the opposite direction to slowly and simultaneously flatten the two stacked rods 2, keeping the steel trough 1 stable. Then, the steel-concrete composite section 4 located above the target position (designed installation position) is installed (the specific installation process is existing technology and will not be described in detail here). The fastening nut 402 is gradually removed from the threaded rod 401, and the other steel-concrete composite section 4 located on the bridge deck is removed from the mounting rod 3. Finally, the stacked rods 2 on both sides of the steel trough 1 are put into the inner groove 101 and returned along the original route.

[0045] Repeat the above operation. After each two steel-concrete composite sections are installed, two steel-concrete composite sections 4 will remain on the bridge deck. These can be installed on the mounting rods 3 on both sides of the steel trough 1. One of the steel-concrete composite sections 4 will be hoisted to the next target location designed for installation.

[0046] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A lifting and hoisting device for steel-concrete composite sections, comprising a hoisting vehicle (7) and a telescopic boom (701) mounted thereon, characterized in that, It also includes a first winding mechanism and a second winding mechanism. The first winding mechanism is connected to a lifting head mechanism via a third steel cable (6) for lifting and hoisting the steel-concrete composite section (4). The lifting head mechanism includes a steel trough (1), with an inner groove (101) opened on the bottom surface of the steel trough (1) facing upwards. Stacking rods (2) are rotatably connected to both sides of the bottom of the inner groove (101). Connecting lugs (103) are fixedly connected to both sides of the inner top surface of the inner groove (101). Top mounting blocks (104) are provided on both sides of the top surface of the steel trough (1). A top rotating shaft (105) is fixedly connected between the two top mounting blocks (104). A first pulley (106) is rotatably connected to the middle section of the top rotating shaft (105). Two bottom through holes (107) are symmetrically opened on the inner top surface of the inner groove (101) and extend to the top surface of the steel trough (1). A top through hole (108) is opened directly above the bottom through hole (107) of the top rotating shaft (105). The stacked rod (2) is rotatably connected to a second pulley (202) at one end away from the bottom of the inner groove (101), and a number of mounting rods (3) are fixedly connected to the bottom surface of the stacked rod (2) for connecting the steel-concrete composite section (4). The two connecting lugs (103) are detachably connected to the first steel cable (5) and the second steel cable (501). The first steel cable (5) and the second steel cable (501) pass through the second pulley (202) on the two stacked rods (2) and then pass through the bottom opening (107) and the top opening (108) and are finally wound up by the second winding mechanism. The top of the telescopic arm (701) is provided with a second fixed pulley (705), and one end of the third steel cable (6) is fixedly connected to the telescopic arm (701). The third steel cable (6) passes through the first pulley (106) and the second fixed pulley (705) and is wound up by the first winding mechanism.

2. The lifting and hoisting equipment for steel-concrete composite sections according to claim 1, characterized in that, The first winding mechanism and the second winding mechanism are both mounted on the telescopic arm (701). The first winding mechanism and the second winding mechanism each include a first drum (702) and a first servo motor (703). The top of the telescopic arm (701) is also provided with a first fixed pulley (704) and a third fixed pulley (706). The first steel cable (5) and the second steel cable (501) are wound by the second winding mechanism after passing through the first fixed pulley (704) and the third fixed pulley (706) respectively. The rotation of the output end of the first servo motor (703) in the first winding mechanism drives the corresponding first drum (702) to rotate, so as to wind up the third steel cable (6) and lift the steel trough (1). The rotation of the output end of the first servo motor (703) in the second winding mechanism drives the corresponding first drum (702) to rotate, so as to simultaneously wind up the first steel cable (5) and the second steel cable (501) and pull the two stacked rods (2) into the inner groove (101).

3. The lifting and hoisting equipment for steel-concrete composite sections according to claim 1, characterized in that, The first winding mechanism includes a first drum (702) and a first servo motor (703) mounted on a telescopic arm (701). The rotation of the output end of the first servo motor (703) drives the first drum (702) to rotate, so as to wind up the third steel cable (6) passing through the first pulley (106) and the second fixed pulley (705). The second winding mechanism includes a top steel plate (8) mounted on the top surface of the top mounting block (104). A second servo motor (801) is mounted on the outer side wall of the top steel plate (8). A connecting shaft (802) is fixedly connected to the output end of the second servo motor (801). A second drum (803) is sleeved on the connecting shaft (802). The rotation of the output end of the second servo motor (801) drives the connecting shaft (802) and the second drum (803) to rotate, so as to simultaneously wind up the first steel cable (5) and the second steel cable (501) passing through the bottom opening (107) and the top opening (108).

4. A lifting and hoisting device for steel-concrete composite sections according to claim 2 or 3, characterized in that, The lower inner wall of the inner groove (101) is symmetrically provided with bottom rotating shafts (102), and the stacked rod (2) has a rotating opening (206) at one end near the bottom of the steel groove body (1), and the bottom rotating shaft (102) is placed in the rotating opening (206).

5. A lifting and hoisting device for steel-concrete composite sections according to claim 2 or 3, characterized in that, The stacking rod (2) has an end slot (201) at one end away from the bottom of the steel trough (1). A steel shaft (203) is installed inside the end slot (201). The second pulley (202) is rotatably connected to the steel shaft (203). A through-hole (204) is opened in the middle section of the stacking rod (2). Several fixing holes (205) are opened at the bottom of the through-hole (204). A bottom fixing hole (302) is opened in the middle section of the mounting rod (3). The rod (2) and the mounting rod (3) are fixedly connected by fasteners (303), bottom fixing port (302) and fixing port (205). The fasteners (303) include secondary bolts and secondary nuts. The secondary bolts pass through the bottom of the mounting rod (3) into the bottom fixing port (302), the fixing port (205) and enter the through port (204). The secondary nuts are threadedly connected to the secondary bolts in the through port (204) to fasten the stacked rod (2) and the mounting rod (3).

6. A lifting and hoisting device for steel-concrete composite sections according to claim 2 or 3, characterized in that, Both ends of the mounting rod (3) are provided with mounting ports (301). Several threaded rods (401) are pre-installed on the top surface of the steel-concrete composite section (4). The threaded rods (401) are threadedly connected to fastening nuts (402). The threaded rods (401) pass through the mounting ports (301) from the bottom surface of the mounting rod (3). The fastening nuts (402) are threadedly connected to the threaded rods (401) on the top surface of the mounting rod (3) to fix the steel-concrete composite section (4) on the mounting rod (3).

7. A working method for the hoisting equipment for steel-concrete composite sections according to claim 6, characterized in that, Includes the following steps: Step 1: Fix the two steel-concrete composite sections (4) to the bottom surface of the mounting rods (3) on both sides of the steel trough (1) using threaded rods (401) and fastening nuts (402); Step 2: Start the first servo motor (703) and the second servo motor (801) to control the winding of the first steel cable (5) and the second steel cable (501), so that the stacked rods (2) on both sides of the steel trough (1) are all drawn into the inner trough (101); Step 3: Start the crane (7) and telescopic boom (701), and start the first servo motor (703) that controls the winding of the third steel cable (6) to lift the steel trough (1) and lower it from the gap of the obstruction toward the target position; Step 4: After the steel trough (1) passes through the gap of the obstruction, start the first servo motor (703) and the second servo motor (801) that control the first steel cable (5) and the second steel cable (501) and make them rotate in the opposite direction, so that the two stacked rods (2) are slowly flattened at the same time, so that the steel trough (1) remains stable. Step 5: Install the steel-concrete composite section (4) located directly above the target position, and gradually remove the fastening nut (402) from the threaded rod (401), and remove the other steel-concrete composite section (4) located on the bridge deck from the mounting rod (3); Step 6: Take the stacked rods (2) on both sides of the steel trough (1) into the inner trough (101) and return along the same route. Repeat the above operation. After each two installations of the steel-concrete composite section (4), there will be two steel-concrete composite sections (4) left on the bridge deck. These can be installed on the mounting rods (3) on both sides of the steel trough (1). One of the steel-concrete composite sections (4) is then hoisted to the next target position.

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