Self-balancing small radius bridge construction equipment

Abstract

The invention discloses a self-balancing bridge erection equipment for small-radius bridge construction, relates to the field of bridge erection equipment, and aims to solve the problem that the support and balance components on the existing bridge erection machine are fixedly pulled on the bridge erection machine, which is easy to cause safety problems when the bridge frame passes through a position with weak support. The invention comprises a main truss structure, a support structure is arranged below the main truss structure, a first beam frame and a second beam frame are slidably connected above the main truss structure, a first sliding sleeve is fixedly connected to the first beam frame, a second sliding sleeve is arranged between the first beam frame and the second beam frame, a counterweight frame is fixedly connected to the head end of the main truss structure, a balance pull rod is connected to the counterweight frame, a traction assembly is arranged on the side of the balance pull rod, a slide table is slidably connected to the first beam frame and the second beam frame, and a lifting rope and a lifting frame are matched on the slide table. The advantage is that the traction assembly cooperates with the first sliding sleeve and the second sliding sleeve, so that the two traction support points on the main truss structure move along with the first beam frame and the second beam frame, thereby improving the overall stability of the device.

Description

Technical Field

[0001] The invention relates to the technical field of bridge erection equipment, in particular to self-balancing bridge erection equipment for small-radius bridge construction. Background Art

[0002] In bridge construction, especially the construction of small radius curved bridges, it has always been a major challenge in the engineering community. Such bridges not only have complex and changeable lines, but also complex structural forces. Especially in difficult construction environments such as mountainous areas, the difficulty of safety and quality control is further increased. Under these complex conditions, traditional bridge erection equipment is often unable to cope with the task, especially when it is necessary to lift and move large bridge frames, and its safety and efficiency are severely tested.

[0003] In existing bridge erection equipment, the support points of most trusses are fixed. This design has obvious limitations when facing the construction of small radius curved bridges. When the bridge is moving, its gravity will cause the force on the truss to change continuously. Especially when the swing arm is too long and the bridge gravity is too large, the support points on the truss may experience a change in force from strong to weak. When the bridge passes through a weakly supported position, it is easy to cause a safety accident.

[0004] The invention patent with application number "CN201310363276.1" discloses "a bridge erecting machine, which includes front legs, rear legs, front supports, rear supports, cross beams, a hoisting trolley and a beam transporting trolley, wherein the hoisting trolley includes a first hoisting trolley and a second hoisting trolley, the beam transporting trolley includes a first beam transporting trolley and a second beam transporting trolley, the first hoisting trolley is located on the right side of the second hoisting trolley, and the first hoisting trolley also includes a first driving mechanism for driving the first hoisting trolley to move along the length direction of the cross beam and a high-speed end controller for controlling the first driving mechanism; the first beam transporting trolley and the second The two beam transport trolleys are respectively arranged at the left and right ends of the bottom of the bridge to be erected, and are respectively provided with a second driving mechanism and a third driving mechanism; the first winch trolley can move synchronously with the first beam transport trolley. "In this application, the first winch trolley and the first beam transport trolley move synchronously, which ensures the stability of the equipment when feeding the beam at the tail of the bridge to be erected to a certain extent; however, during the translation of the bridge to be erected, the bridge to be erected moves relative to the device, causing the main force points on the truss to change continuously. If the stability of the truss body cannot be guaranteed, accidents will still occur in the bridge to be erected during a certain process. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a self-balancing bridge-building equipment for small-radius bridge construction. Through this design, the problem of fixed traction of the support and balance components on the existing bridge-building machine is effectively solved. When the bridge to be built moves with the device, the support points on the truss may experience a change in force from strong to weak. When the bridge passes through a position with weak support, it is easy to cause safety problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: the present invention comprises a main truss structure, a supporting structure is provided below the main truss structure, a first beam frame and a second beam frame are slidably connected above the main truss structure, a first sliding sleeve is fixedly connected to the first beam frame, a connecting rod is fixedly connected to the first sliding sleeve, a second sliding sleeve is provided between the first beam frame and the second beam frame, the second sliding sleeve is slidably connected to the main truss structure, a counterweight frame is fixedly connected to the head end of the main truss structure, a balancing pull rod is fixedly connected to the counterweight frame, the height of the balancing pull rod is higher than that of the first beam frame, a traction assembly is provided on the counterweight frame on the side of the balancing pull rod, a slide table is slidably connected to both the first beam frame and the second beam frame, and a lifting rope and a lifting frame are matched on the slide table;

[0007] The traction assembly comprises a winding roller, a first traction rope is fixedly connected to the winding roller, the other end of the first traction rope is passed around the balance rod and the connecting rod, and the other end of the first traction rope is fixedly connected to the counterweight frame;

[0008] The traction assembly also includes a second traction rope, one end of which is fixedly connected to the counterweight frame, and the other end of the second traction rope is fixedly connected to the tail end of the main truss structure. A support rod is provided at the tail end of the main truss structure, and the second traction rope is in an M shape and passes around the balance rod, the second sliding sleeve and the support rod.

[0009] Preferably, the main truss structure includes two groups of symmetrically distributed upper chords, two lower chords are provided below the two upper chords, a web is fixedly connected between the two lower chords and the upper chords, and the upper chords and the lower chords are both I-beams.

[0010] Preferably, the first sliding sleeve and the second sliding sleeve are both provided with a T-shaped first sliding groove, and the first sliding groove is slidably connected to the upper chord rod.

[0011] Preferably, the supporting structure includes movable legs, supporting legs and sliding legs, the movable legs are fixedly connected to the main truss structure, the upper ends of the supporting legs and the sliding legs are fixedly connected to a slide, and the slide is slidably connected to the main truss structure.

[0012] Preferably, the supporting leg includes a first support rod and a second support rod, the first support rod and the second support rod are slidably connected, and a first hydraulic rod is installed between the first support rod and the second support rod.

[0013] Preferably, the sliding support leg includes a third support rod and a fourth support rod, the third support rod is slidably connected to the fourth support rod, and a second hydraulic rod is installed between the third support rod and the fourth support rod.

[0014] Preferably, the balancing rod includes two groups of symmetrically distributed first connecting rods, two of the first connecting rods are respectively hinged to two main truss structures, the other end of the first connecting rod is hinged to a first telescopic rod, the other end of the first telescopic rod is hinged to the counterweight frame, and cylindrical rods are hinged to the two first connecting rods.

[0015] Preferably, the support rod is hinged to the main truss structure, a second telescopic rod is hinged to the main truss structure, and the second telescopic rod is hinged to the support rod.

[0016] Preferably, the first traction rope and the second traction rope are equipped with multiple sets of fixed pulleys, and the multiple sets of fixed pulleys are rotatably mounted on the cylindrical rod, the balance pull rod, the second sliding sleeve and the support rod respectively.

[0017] Compared with the prior art, the present invention has the following outstanding advantages:

[0018] The present invention adds a first sliding sleeve and a second sliding sleeve for tensile traction on the main truss structure. The first sliding sleeve and the second sliding sleeve translate with the movement of the first beam and the second beam, thereby ensuring that the traction point is adjusted synchronously with the movement of the first beam and the second beam, avoiding the first beam and the second beam from moving to the weak support point of the main truss structure, and ensuring the stability of the main truss structure.

[0019] In the present invention, the length of the first traction rope can be adjusted by the winding roller, and the winding roller is wound as the first beam moves. The length of the second traction rope is fixed and remains unchanged. As the second sliding sleeve moves, the traction point of the second traction rope changes accordingly, thereby ensuring the stabilizing effect of the second sliding sleeve on the main truss mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the overall forward structure of the present invention.

[0022] Figure 3 It is a schematic diagram of the upper end connection structure of the counterweight frame of the present invention.

[0023] Figure 4 It is a schematic diagram of the connection structure of the support leg and the sliding leg of the present invention.

[0024] Figure 5 This is a schematic diagram of the first traction rope connection structure of the present invention.

[0025] Figure 6 It is a schematic diagram of the second sliding sleeve connection structure of the present invention.

[0026] Figure 7 It is a schematic diagram of the supporting leg structure of the present invention.

[0027] Figure 8 It is a schematic diagram of the sliding support structure of the present invention.

[0028] Fig. 9 It is a schematic diagram of the second telescopic rod connection structure of the present invention.

[0029] Fig.10 It is a schematic diagram of the slide connection structure of the present invention.

[0030] Numbers in the figure: 1, main truss structure; 101, upper chord; 102, lower chord; 103, web; 2, support structure; 201, mobile support; 202, support support; 2021, first support rod; 2022, second support rod; 2023, first hydraulic rod; 203, sliding support; 2031, third support rod; 2032, fourth support rod; 2033, second hydraulic rod; 3, first beam frame; 4, second beam frame; 5, The first sliding sleeve; 6. connecting rod; 7. second sliding sleeve; 8. counterweight frame; 9. balancing rod; 901. first connecting rod; 902. first telescopic rod; 903. cylindrical rod; 10. traction assembly; 1001. winding roller; 1002. first traction rope; 1003. second traction rope; 1004. supporting rod; 11. lifting rope; 12. hanging bracket; 13. first slide groove; 14. second telescopic rod; 15. fixed pulley; 16. slide table. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] Please see attached Figure 1-10The self-balancing small-radius bridge erection equipment of this embodiment comprises a main truss structure 1, a support structure 2 is provided below the main truss structure 1, a first beam frame 3 and a second beam frame 4 are slidably connected above the main truss structure 1, a first sliding sleeve 5 is fixedly connected to the first beam frame 3, a connecting rod 6 is fixedly connected to the first sliding sleeve 5, a second sliding sleeve 7 is provided between the first beam frame 3 and the second beam frame 4, the second sliding sleeve 7 is slidably connected to the main truss structure 1, and a counterweight frame 8 is fixedly connected to the head end of the main truss structure 1 The counterweight frame 8 is fixedly connected with a balancing rod 9, and the height of the balancing rod 9 is higher than the height of the first beam frame 3. A traction assembly 10 is provided on the counterweight frame 8 on the side of the balancing rod 9. The first beam frame 3 and the second beam frame 4 are both slidably connected with a slide 16, and the slide 16 is equipped with a lifting rope 11 and a lifting frame 12, which mainly bears and transfers the load to ensure the safety and stability of the project. The main truss structure 1 has two groups, the first beam frame 3 and the second beam frame 4 are located above the two main truss structures 1, and the first beam frame 3 and The second beam frame 4 is provided with a roller, and a motor is provided on the roller. The motor drives the first beam frame 3 and the second beam frame 4 to move horizontally on the main truss structure 1 through the roller. The first beam frame 3 and the second beam frame 4 are provided with a slide 16. The slide 16 can move forward and backward on the first beam frame 3 and the second beam frame 4. Under the action of the first beam frame 3, the second beam frame 4 and the slide 16, the suspension rope 11 and the hanger 12 have lateral and longitudinal movement, so that the suspension rope 11 and the hanger 12 have adjustment functions in different directions, thereby ensuring the accurate alignment installation of the box beam. The beam 3, the second beam 4, the slide 16 and the main truss structure 1 are also provided with a hydraulic system, an electrical system, a diesel generator set, a safety protection monitoring system and other auxiliary components, wherein the hydraulic system provides power for various actions of the bridge-building machine, and the electrical system controls various operations of the bridge-building machine. The main truss structure 1, the first beam 3, the second beam 4, the slide 16, the suspension rope 11 and the hanger 12 are all the same as those in the prior art, and the control system therein is the same as the control method of the existing bridge-building machine, and the bridge-building machine operates in the existing manner.

[0033] Furthermore, in order to improve the stability of the main truss structure 1, a first sliding sleeve 5 and a second sliding sleeve 7 are installed on the main truss structure 1. The first sliding sleeve 5 and the second sliding sleeve 7 cooperate with the traction assembly 10 on the counterweight frame 8. The traction assembly 10 has an oblique upward traction force on the first sliding sleeve 5 and the second sliding sleeve 7 through the balance pull rod 9. When the main truss structure 1 is subjected to downward gravity, the traction assembly 10 offsets the vertical gravity of the main truss structure 1 through the oblique pulling force of the first sliding sleeve 5 and the second sliding sleeve 7, thereby increasing the bearing safety of the main truss structure 1. In addition, in order to prevent the first sliding sleeve 5 and the second sliding sleeve 7 from affecting the first The beam frame 3 and the second beam frame 4 slide left and right on the main truss structure 1. At the same time, the first beam frame 3 and the second beam frame 4 are the two points with the greatest force when lifting the bridge frame. In order to improve the safety performance of lifting, the first sliding sleeve 5 is fixedly connected to the first beam frame 3. The oblique pulling traction force on the first sliding sleeve 5 also changes the point of action on the main truss structure 1 as the first beam frame 3 moves. In the process of lifting, the point on the main truss structure 1 with the heaviest force is obliquely pulled. The second sliding sleeve 7 is located between the first beam frame 3 and the second beam frame 4. A driving wheel is also provided on the sliding sleeve. The sliding sleeve can move freely on the main truss structure 1. When the first beam frame 3 or When the second beam 4 moves, the second sleeve 7 will also move accordingly, so that the second sleeve 7 is always maintained between the first beam 3 and the second beam 4. The second traction rope 1003 in the traction assembly 10 passes through the balance rod 9, the second sleeve 7 and the support rod 1004 in an M-shaped structure. The stability of the middle part of the main truss structure 1 is improved through two sets of oblique pulls at both ends. At the same time, the horizontal movement of the second sleeve 7 does not affect the oblique pull effect of the second traction rope 1003 on the two ends of the second sleeve 7. The left and right sliding of the second sleeve 7 will not interfere with the second traction rope 1003, ensuring that the second sleeve 7 can Freely adjust to the position between the first beam 3 and the second beam 4; the counterweight frame 8 balances the weight of the crane arm and the cargo by mounting counterweight blocks, so that the bridge-building machine can remain stable during lifting, hoisting and construction to prevent overturning or shaking caused by weight imbalance. When the bridge-building machine is in operation, the counterweight blocks on the counterweight frame 8 need to be adjusted according to the weight of the crane arm and the cargo. By increasing or decreasing the number or position of the counterweight blocks, the center of gravity of the bridge-building machine can be made to coincide with the center of gravity of the supporting surface, thereby achieving a balanced state. This helps to ensure the stability and safety of the bridge-building machine during lifting, hoisting and construction.

[0034] The traction assembly 10 includes a winding roller 1001, to which a first traction rope 1002 is fixedly connected, the other end of the first traction rope 1002 is passed around the balancing rod 9 and the connecting rod 6, and the other end of the first traction rope 1002 is fixedly connected to the counterweight frame 8; the traction assembly 10 also includes a second traction rope 1003, one end of the second traction rope 1003 is fixedly connected to the counterweight frame 8, and the other end of the second traction rope 1003 is fixedly connected to the tail end of the main truss structure 1, and a support rod 1004 is provided at the tail end of the main truss structure 1, and the second traction rope 1003 is in an M shape and passes around the balancing rod 9, the second sliding sleeve 7 and the support rod 1004.

[0035] The first traction rope 1002 and the second traction rope 1003 in the traction assembly 10 are both used for balancing the main truss structure 1, wherein the winding roller 1001 is used for winding and releasing the first traction rope 1002, and the winding roller 1001 is rotated by a motor to realize the winding and releasing of the first traction rope 1002, and the winding roller 1001 is located on the counterweight frame 8, the purpose is to balance the gravity of the main truss structure 1, the balance rod 9 acts to raise the pulling point of the first traction rope 1002 and the second traction rope 1003, and the left and right sides of the connecting rod 6 are connected. The two first sliding sleeves 5 are connected on the side, and the first traction rope 1002 is passed around the balance rod 9 and the connecting rod 6. The lower end of the second traction rope 1003 is flush with the horizontal plane. The traction of the first traction rope 1002 ensures the stability of the main truss structure 1. Compared with the first traction rope 1002, the length of the second traction rope 1003 is fixed. The second traction rope 1003 connects the counterweight frame 8 and the tail end of the main truss structure 1. The second traction rope 1003 is M-shaped and passes around the balance rod 9, the second sliding sleeve 7 and the support rod 1004. This bypass path design helps to ensure that the second traction rope 1003 can maintain a stable tension during movement and prevent it from being broken or damaged due to excessive tension or pressure. At the same time, this design also helps to improve the stability and safety of the entire mechanical structure.

[0036] The main truss structure 1 includes two groups of symmetrically distributed upper chords 101, two lower chords 102 are arranged below the two upper chords 101, a web 103 is fixedly connected between the two lower chords 102 and the upper chords 101, and the upper chords 101 and the lower chords 102 are both I-beams.

[0037] The upper chord 101 and the two lower chords 102 are distributed in a triangular shape, and the three are fixedly connected by multiple groups of web members 103 to form a stable three-dimensional space structure. The main truss structure 1 composed of multiple members has good rigidity and stability and can withstand large loads. The main truss structure 1 has two groups, and the main truss structure 1 is symmetrical in the horizontal direction, which helps to improve its overall stability. The upper chord 101 and the lower chord 102 are both in the shape of I-beams, which provides a larger sectional moment of inertia, thereby enhancing its ability to resist bending deformation.

[0038] The first sliding sleeve 5 and the second sliding sleeve 7 are both provided with a T-shaped first sliding groove 13, and the first sliding groove 13 is slidably connected to the upper chord rod 101; the first sliding sleeve 5 and the second sliding sleeve 7 are both provided with the same first sliding groove 13, and parts of the first sliding sleeve 5 and the second sliding sleeve 7 are stuck in the I-shaped structure of the upper chord rod 101, so as to ensure that the first sliding sleeve 5 and the second sliding groove can slide relative to the upper chord rod 101, and at the same time, when the first sliding sleeve 5 and the second sliding sleeve 7 are subjected to oblique tension, the oblique tension will also be applied to the main truss structure 1, thereby having a lifting effect on the main truss structure 1.

[0039] The support structure 2 includes a movable support leg 201, a supporting support leg 202 and a sliding support leg 203. The movable support leg 201 is fixedly connected to the main truss structure 1. The upper ends of the supporting support leg 202 and the sliding support leg 203 are fixedly connected with a slide, and the slide is slidably connected to the main truss structure 1.

[0040] The support structure 2 is a system composed of multiple components, which is intended to provide additional stability and support for the main girder structure 1. It includes key components such as mobile legs 201, support legs 202, sliding legs 203 and slides. The mobile legs 201 are the fixed parts of the support structure 2, and are fixedly connected to the main girder structure 1 by welding or bolting. A plurality of electric casters are installed under the mobile legs 201. The mobile legs 201 are driven by the electric casters to move the mobile legs 201, and the mobile legs 201 drive the horizontal movement of the main girder structure 1. The support legs 202 and sliding legs 203 are the movable parts of the support structure 2, and are slidably connected to the main girder structure 1 through the slide. The support legs 202 are usually used to provide additional vertical support, while the sliding legs 203 can be slidably adjusted along the main girder structure 1 when needed. The slide is connected to the support legs 202 and the sliding legs 203. 03 is a key component of the main truss structure 1, which is designed with a sliding track or slide groove that matches the main truss structure 1 to achieve a smooth sliding connection. The material and manufacturing process of the slide usually require high wear resistance and strength to ensure good performance and stability during long-term use; the sliding connection between the slide and the main truss structure 1 is achieved by matching the sliding track or slide groove on the slide with the corresponding part on the main truss structure 1. The sliding connection allows the support legs 202 and the sliding legs 203 in the support structure 2 to slide and adjust along the main truss structure 1 when necessary to adapt to different construction conditions or load requirements. The sliding connection enables the support structure 2 to flexibly adapt to the deformation and displacement of the main truss structure 1, thereby improving the stability and safety of the entire structure. During the construction process, the sliding connection also allows fine-tuning of the support structure 2 to ensure that it can meet specific engineering requirements.

[0041] The support leg 202 includes a first support rod 2021 and a second support rod 2022, the first support rod 2021 and the second support rod 2022 are slidably connected, and a first hydraulic rod 2023 is installed between the first support rod 2021 and the second support rod 2022; the first support rod 2021 and the second support rod 2022 are both H-shaped structures, and the first support rod 2021 and the second support rod 2022 are relatively moved by a sliding connection, and the sliding connection allows the first support rod 2021 and the second support rod 2022 to move relative to each other in the length direction, so as to adjust the overall height of the support leg 202, and there are two support legs 202, and the two support legs 202 are respectively located below the two main truss structures 1, and the first hydraulic rod 2023 is installed on the first support rod 2 021 and the second support rod 2022, it is used to provide driving force so that the first support rod 2021 and the second support rod 2022 can move relative to each other. When the hydraulic rod is extended or shortened, it will push or pull the first support rod 2021 and the second support rod 2022 to move relative to each other, thereby adjusting the height of the support leg 202. By adjusting the sliding connection between the first support rod 2021 and the second support rod 2022 and the extension or shortening of the first hydraulic rod 2023, the overall height of the support leg 202 can be easily adjusted, so that the device can adapt to different construction conditions or load requirements. In addition, the design of the support leg 202 enables it to provide additional stability and supporting force, especially in scenarios that need to withstand larger loads or require higher stability.

[0042] The sliding support leg 203 includes a third support rod 2031 and a fourth support rod 2032, the third support rod 2031 is slidably connected to the fourth support rod 2032, and a second hydraulic rod 2033 is installed between the third support rod 2031 and the fourth support rod 2032; the sliding support leg 203 has the same function as the supporting support leg 202, and also provides an additional support for the main truss structure 1, and can also be slidably adjusted along the main truss structure 1, the third support rod 2031 and the fourth support rod 2032 constitute the main structure of the sliding support leg 203, and the two can slide in the vertical direction, thereby allowing the sliding support leg 203 to be adjusted in the length direction, and the sliding connection is realized by a slide groove, a guide rail or a similar sliding mechanism to ensure that the third support rod 2031 and the fourth support rod 2032 can slide relative to each other smoothly and reliably, and the design of the sliding connection enables the third support rod 2031 and the fourth support rod 2032 to fit closely together, and the sliding support The foot 203 has high wear resistance and strength to ensure that the sliding foot 203 can maintain good performance and stability during long-term use. The second hydraulic rod 2033 is a key component installed between the third support rod 2031 and the fourth support rod 2032. It uses the pressure transmission principle of liquid to provide driving force so that the third support rod 2031 and the fourth support rod 2032 can move relative to each other. When the second hydraulic rod 2033 is extended or shortened, it will push or pull the third support rod 2031 and the fourth support rod 2032 to move relative to each other, thereby adjusting the overall length or angle of the sliding foot 203. This adjustment capability enables the sliding foot 203 to better adapt to different construction conditions and load requirements. The design of the sliding foot 203 not only provides additional supporting force, but also enhances the overall stability through its sliding connection and hydraulic adjustment mechanism. This design enables the sliding foot 203 to remain stable when subjected to large loads, ensuring construction safety and project quality.

[0043] The balancing rod 9 includes two groups of symmetrically distributed first connecting rods 901, the two first connecting rods 901 are respectively hinged to the two main truss structures 1, the other end of the first connecting rod 901 is hinged to the first telescopic rod 902, the other end of the first telescopic rod 902 is hinged to the counterweight frame 8, and the two first connecting rods 901 are hinged to a cylindrical rod 903; the support rod 1004 is hinged to the main truss structure 1, and the main truss structure 1 is also hinged to a second telescopic rod 14, and the second telescopic rod 14 is hinged to the support rod 1004.

[0044] The two groups of first connecting rods 901 are mirror-symmetrical in layout. The two groups of first connecting rods 901 are respectively located on the two main truss structures 1. One end of each first connecting rod 901 is hinged to the main truss structure 1. This connection method allows the first connecting rod 901 to have a certain degree of rotational freedom relative to the main truss structure 1, so that it can adapt to forces of various angles and directions. A first telescopic rod 902 is hinged to the other end of the first connecting rod 901. The first telescopic rod 902 has a telescopic characteristic and can be adjusted in length as needed. The other end of the first telescopic rod 902 is hinged to the counterweight frame 8. In this way, by adjusting the length of the first telescopic rod 902, the first connecting rod 901 can be effectively adjusted. The elevation angle is adjusted to adjust the horizontal height of the cylindrical rod 903. In addition, the other end of the main truss structure 1 is hinged with a support rod 1004 and a second telescopic rod 14, and the second telescopic rod 14 can also be telescopically adjusted. The height of the upper end of the support rod 1004 is adjusted by changing the length of the second telescopic rod 14, so that the support rod 1004 and the first connecting rod 901 are consistent in height. Through the adjustment of the support rod 1004 and the first connecting rod 901, the first traction rope 1002 and the second traction rope 1003 are used to pull the main truss structure 1 obliquely, so that the first traction rope 1002 and the second traction rope both have an upward vertical component on the main truss structure 1, which has a good supporting effect on the stability of the main truss structure 1.

[0045] The first traction rope 1002 and the second traction rope 1003 are equipped with multiple sets of fixed pulleys 15, and the multiple sets of fixed pulleys 15 are respectively rotatably installed on the cylindrical rod 903, the balance rod 9, the second sliding sleeve 7 and the support rod 1004. The fixed pulley 15 is a simple machine that can change the direction of the pulling force. When the first traction rope 1002 and the second traction rope 1003 pass around the fixed pulley 15, the direction of the pulling force will also change accordingly, but the magnitude of the pulling force remains unchanged. The multiple sets of fixed pulleys 15 are respectively rotatably installed on the cylindrical rod 903, the balance rod 9, the second sliding sleeve 7 and the support rod 1004. The fixed pulley 15 is rotatably installed on these components to ensure that the first traction rope 1002 and the second traction rope 1003 can smoothly exchange positions and flexibly control the stability and balance of the structure.

[0046] The overall workflow of the present invention when in use is as follows: the main truss structure 1 is a stable component, and a support structure 2 is provided below the main truss structure 1 to ensure overall stability. In the initial position, the support structure 2 drives the main truss structure 1 and the counterweight frame 8 to move toward the position of the pier. Driven by the support structure 2, the right end of the main truss structure 1 moves to above the unpaved pier, and then the sliding legs 203 and the supporting legs 202 in the support structure 2 move to the right along the main truss structure 1, thereby moving the supporting legs 202 and the sliding legs 203 to above the unpaved pier, and then the sliding legs 203 and the supporting legs 202 stand on the pier, and then the first beam frame 3 and the second beam frame 4 are lifted to the bridge frame by the suspension rope 11 and the suspension frame 12, and then the first beam frame 3 and the second beam frame 4 drive the bridge frame to move to the right along the main truss structure 1, thereby moving the bridge frame to the pier to complete the laying, and due to the overall stability of the bridge frame The body weight is too large and the span of the main truss structure 1 is long during laying. In order to improve the stability of the main truss structure 1, the counterweight frame 8 and the traction assembly 10 on the side of the main truss structure 1 stabilize the main truss structure 1, wherein the first traction rope 1002 in the traction assembly 10 cooperates with the connecting rod 6 and the first sliding sleeve 5, and the oblique tension of the first traction rope 1002 moves with the movement of the first beam 3, and the main load-bearing position of the device is pulled and stabilized to ensure the stability of the entire device. In addition, the second traction rope 1003 plays a lifting role through the second sliding sleeve 7, and the second sliding sleeve 7 can slide horizontally on the main truss structure 1 to ensure that the second sliding sleeve 7 is located between the first beam 3 and the second beam 4, and to ensure that there is an upward pulling force between the second beam 4 and the first beam 3, thereby ensuring the stability of the main truss structure 1 and avoiding accidents of the main truss structure 1 during construction.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Self-balancing small radius bridge construction equipment, characterized by: The invention comprises a main truss structure (1), a supporting structure (2) is provided below the main truss structure (1), a first beam frame (3) and a second beam frame (4) are slidably connected above the main truss structure (1), a first sliding sleeve (5) is fixedly connected to the first beam frame (3), a connecting rod (6) is fixedly connected to the first sliding sleeve (5), a second sliding sleeve (7) is provided between the first beam frame (3) and the second beam frame (4), the second sliding sleeve (7) is slidably connected to the main truss structure (1), a counterweight frame (8) is fixedly connected to the head end of the main truss structure (1), a balancing pull rod (9) is fixedly connected to the counterweight frame (8), the height of the balancing pull rod (9) is higher than the height of the first beam frame (3), a traction assembly (10) is provided on the counterweight frame (8) on the side of the balancing pull rod (9), a slide table (16) is slidably connected to both the first beam frame (3) and the second beam frame (4), and a lifting rope (11) and a lifting frame (12) are matched on the slide table (16); The traction assembly (10) comprises a winding roller (1001), a first traction rope (1002) being fixedly connected to the winding roller (1001), the other end of the first traction rope (1002) passing around a balancing rod (9) and a connecting rod (6), and the other end of the first traction rope (1002) being fixedly connected to the counterweight frame (8); The traction assembly (10) further comprises a second traction rope (1003), one end of the second traction rope (1003) being fixedly connected to the counterweight frame (8), and the other end of the second traction rope (1003) being fixedly connected to the tail end of the main truss structure (1), the tail end of the main truss structure (1) being provided with a support rod (1004), and the second traction rope (1003) being in an M shape and passing around the balance pull rod (9), the second sliding sleeve (7) and the support rod (1004).

2. The self-balancing small-radius bridge erection equipment according to claim 1 is characterized in that: The main truss structure (1) comprises two groups of symmetrically distributed upper chords (101), two lower chords (102) are provided below the two upper chords (101), a web member (103) is fixedly connected between the two lower chords (102) and the upper chord (101), and the upper chords (101) and the lower chords (102) are both I-beams.

3. The self-balancing small-radius bridge erection equipment according to claim 2 is characterized in that: The first sliding sleeve (5) and the second sliding sleeve (7) are both provided with a T-shaped first sliding groove (13), and the first sliding groove (13) is slidably connected to the upper chord rod (101).

4. The self-balancing small-radius bridge erection equipment according to claim 1 is characterized in that: The support structure (2) comprises a movable support foot (201), a support support foot (202) and a sliding support foot (203); the movable support foot (201) is fixedly connected to the main truss structure (1); the upper ends of the support support foot (202) and the sliding support foot (203) are both fixedly connected to a slide; and the slide is slidably connected to the main truss structure (1).

5. The self-balancing small-radius bridge erection equipment according to claim 4 is characterized in that: The supporting leg (202) comprises a first supporting rod (2021) and a second supporting rod (2022), the first supporting rod (2021) and the second supporting rod (2022) being slidably connected, and a first hydraulic rod (2023) being installed between the first supporting rod (2021) and the second supporting rod (2022).

6. The self-balancing small-radius bridge erection equipment according to claim 4 is characterized in that: The sliding support foot (203) comprises a third support rod (2031) and a fourth support rod (2032), the third support rod (2031) and the fourth support rod (2032) are slidably connected, and a second hydraulic rod (2033) is installed between the third support rod (2031) and the fourth support rod (2032).

7. The self-balancing small-radius bridge erection equipment according to claim 1 is characterized in that: The balancing rod (9) comprises two groups of symmetrically distributed first connecting rods (901), the two first connecting rods (901) being hinged to the two main truss structures (1) respectively, the other end of the first connecting rod (901) being hinged to a first telescopic rod (902), the other end of the first telescopic rod (902) being hinged to the counterweight frame (8), and the two first connecting rods (901) being hinged to a cylindrical rod (903).

8. The self-balancing small-radius bridge erection equipment according to claim 7 is characterized in that: The support rod (1004) is hinged to the main truss structure (1), a second telescopic rod (14) is also hinged to the main truss structure (1), and the second telescopic rod (14) is hinged to the support rod (1004).

9. The self-balancing small-radius bridge erection equipment according to claim 8, characterized in that: The first traction rope (1002) and the second traction rope (1003) are equipped with a plurality of fixed pulleys (15), and the plurality of fixed pulleys (15) are rotatably mounted on the cylindrical rod (903), the balancing pull rod (9), the second sliding sleeve (7) and the support rod (1004).

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