Self-propelled box girder web concrete flow guide device and construction method

Abstract

The invention discloses a self-propelled box girder web concrete diversion device and a construction method, and relates to the technical field of concrete diversion, the construction method comprises the following steps: laying a track along the length direction of a box girder web, assembling a self-propelled mechanism with a diversion box on the track, and placing a concrete discharge port in the diversion box; during pouring construction, two material distributors are used for inclined material distribution, continuous pouring, horizontal layering left-right symmetrical equal-height pouring and one-time forming, and the specific construction steps are as follows: step 1, bottom web pouring: 1) uniformly and symmetrically blanking from webs on two sides of a box girder at the same time; according to the self-propelled box girder web concrete flow guide device and the construction method, when the self-propelled box girder web concrete flow guide device works, due to the arrangement of the flow guide box, concrete grout can be effectively prevented from being splashed to a web or a flange plate formwork, and then obvious dry ash, slag inclusion and pitted surfaces can be prevented from being formed by the grout splashed to the formwork after the grout is splashed to the formwork for a long time.

Description

Technical Field

[0001] This invention relates to the field of concrete diversion technology, specifically to a self-propelled box girder web concrete diversion device. Background Technology

[0002] With rapid economic development, especially the large-scale infrastructure construction undertaken to stimulate consumption, the construction industry has experienced unprecedented growth. Box girders are increasingly being used on construction sites. The widespread adoption of box girders in high-speed railways is a natural result of the perfect combination of technological requirements (high rigidity, high stability, and high smoothness) and engineering practices (standardized prefabrication, mechanized erection, high efficiency, and high quality). While meeting the core performance requirements of high-speed rail, it achieves large-scale, high-quality, and high-efficiency construction through industrialized construction methods, and possesses excellent long-term economic benefits and ease of maintenance. Therefore, it has become the undisputed preferred structural form in modern high-speed railway bridge engineering.

[0003] Currently, when pouring concrete for the web of a box girder at the construction site, the concrete slurry splashes onto the web or flange formwork. The slurry splashed onto the formwork will solidify over time, resulting in obvious dry ash, slag inclusions, and pitting on the surface, causing the appearance quality of the finished concrete structure to be substandard. Summary of the Invention

[0004] The purpose of this invention is to provide a self-propelled box girder web concrete diversion device to overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a construction method, comprising laying a track along the length of the web of a box girder, assembling a self-propelled mechanism with a guide box onto the track, and placing the concrete discharge port inside the guide box; during the pouring construction, two concrete placing machines are used to place the concrete obliquely and pour continuously, pouring horizontally in layers with equal height on both sides, forming in one go. The specific construction steps are as follows: Step 1: Pouring the bottom web, 1) Starting simultaneously from both sides of the web of the box girder, uniformly and symmetrically placing the concrete to ensure that the concrete height on both sides is basically the same, avoiding the inner formwork shift; 2) The concrete pouring of the web on the same side is advanced longitudinally, near 1 / 4 span (6-8m). 1) Ensure the structure is balanced under stress by merging the top slab and the bottom slab; 2) Pour the web slab concrete first, then pour the web slab concrete to ensure the joint is tight; 3) Vibrate the web slab concrete in layers, control the height of each layer, and pause when pouring to the top slab joint surface; 4) Pour the bottom slab concrete through the pre-reserved pouring hole on the top surface of the inner formwork, and spread and vibrate it in time to ensure the density; 5) After the bottom slab concrete is replenished, accurately control the top surface elevation, vibrate it to be flat and meet the design requirements; Step 2: Pour the top slab, 1) Pour continuously from both ends of the top slab to the middle, and merge it at the middle of the span; 2) After merging, pour the top layer of bridge deck concrete from one end to the other end to facilitate surface finishing and ensure flatness.

[0006] A self-propelled box girder web concrete diversion device includes: a guide rail frame spliced ​​together, each guide rail frame including two parallel fixed plates for fixing at the construction site, the two fixed plates being fixedly connected by a connecting beam, rails being fixedly connected to the fixed plates, and limit grooves being provided on the rails; a self-propelled mechanism, which is assembled to drive a frame to slide on the rails, the self-propelled mechanism including a frame and multiple drive wheels, each drive wheel being rotatably connected to the frame, each drive wheel having an annular groove for the rails to engage, and a limit ring being fixedly connected in the annular groove to slide in cooperation with the limit groove; and a diversion box, which is installed on the self-propelled mechanism by a detachable mechanism, the diversion box being wider at the top and narrower at the bottom, with concrete flowing from the wide end of the diversion box to the narrow end.

[0007] Preferably, the two fixed plates are fixedly connected by a connecting beam.

[0008] Preferably, the self-propelled mechanism further includes a control box, which is fixedly connected to the frame. The controller inside the control box is electrically connected to the drive source of the drive wheels. Under the control of the controller, each drive wheel can drive the frame to move along the corresponding guide rail.

[0009] Preferably, multiple wheels are arranged in a rectangular pattern on the frame.

[0010] Preferably, the detachable mechanism includes four locking units arranged in a rectangular shape. Each locking unit includes: a guide groove formed on the vehicle frame; a guide strip fixedly connected to the air deflector and capable of engaging with the corresponding guide groove; a locking pin threadedly connected to the vehicle frame; and a locking hole formed on the air deflector.

[0011] Preferably, any two adjacent guide rail frames of each guide rail frame are spliced ​​together by a docking mechanism. The docking mechanism includes a docking groove opened at one end of a fixed plate, and a docking post that docks with the docking groove is fixedly connected to the other end of the fixed plate. During splicing and installation, the docking post on one of the two adjacent guide rail frames is inserted into the corresponding docking groove of the other guide rail frame, and the insertion end of each docking post is hemispherical.

[0012] Preferably, the frame is provided with a plurality of cleaning components corresponding to each drive wheel. Each cleaning component includes a cleaning unit located on the front and rear sides of the corresponding drive wheel. The cleaning unit includes a limit rod fixedly connected via an extension frame. The bottom of the limit rod is fixedly connected to a cleaning plate located in the corresponding limit groove.

[0013] Preferably, each cleaning plate has a first inclined surface, wherein the first inclined surface faces the direction of travel of the corresponding drive wheel.

[0014] Preferably, each limiting groove has a threaded passage, and a threaded tube is fixedly connected to the corresponding locking pin. The circumferential side of the threaded tube is threaded with threads that mate with the threaded passage.

[0015] Preferably, a barrier plate is fixedly connected to the limiting rod, and the barrier plate has two symmetrically arranged guide slopes, the inclination direction of which is downward from the center of the barrier plate outward.

[0016] In the above technical solution, the present invention provides a self-propelled box girder web concrete diversion device. During operation, concrete is first poured into a diversion box, allowing it to flow from the wide end to the narrow end, thus completing the pouring. The diversion box effectively prevents concrete slurry from splashing onto the web or flange formwork, preventing the slurry splashed onto the formwork from forming obvious dry ash, slag inclusions, and pitting after solidification, further ensuring the final concrete structure meets appearance quality standards. Based on this, under the control of the controller in the control box, the drive wheels rotatably connected to the frame move along corresponding guide rails, allowing the diversion box to synchronously follow the frame. The entire process requires only operator intervention, eliminating the need for manual pulling, thus reducing workload and allowing for extended pouring operations. The design of the limiting slip ring and limiting groove prevents the frame from shifting during movement, enabling more precise pouring operations. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 Provided for embodiments of the present invention Figure 1 Enlarged view of A in the middle; Figure 3 This is a schematic diagram of the structure of the cleaning unit provided in an embodiment of the present invention; Figure 4 This is a split view of the air deflector and vehicle frame provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the locking unit provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the baffle provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the docking mechanism provided in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Chassis; 2. Guide rail frame; 21. Fixing plate; 22. Rail; 23. Limiting groove; 3. Drive wheel; 4. Annular groove; 5. Limiting slip ring; 6. Cleaning unit; 61. Limiting rod; 62. Cleaning plate; 63. First inclined plane; 64. Barrier plate; 65. Guide inclined plane; 7. Flow box; 8. Control box; 9. Locking unit; 91. Guide groove; 92. Guide bar; 93. Locking pin; 94. Locking hole; 10. Threaded passage; 11. Threaded pipe; 12. Connecting groove; 13. Connecting post; 14. Connecting beam; 15. Baffle. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Please see Figure 1-8 The present invention provides a construction method in which a track is laid along the length of the web of a box girder, a self-propelled mechanism with a guide box is assembled onto the track, and the concrete discharge port is placed inside the guide box. During the pouring construction, two concrete placing machines are used to place the concrete obliquely and pour it continuously, pouring it horizontally in layers at equal heights, forming it in one go. The specific construction steps are as follows: Step 1: Cast the bottom web. 1) Start from both sides of the box girder webs simultaneously, and cut the concrete evenly and symmetrically to ensure that the concrete height on both sides is basically the same and to avoid the inner formwork shifting. 2) The concrete pouring of the web plate on the same side is carried out longitudinally and closed near 1 / 4 span (6-8m) to ensure the structural stress is balanced; 3) First pour the concrete at the joint between the web and the bottom slab, then pour the web concrete to ensure a tight joint; 4) Vibrate the web concrete in layers, controlling the height of each layer, and pause when pouring to the interface with the top slab; 5) Pour the concrete through the pre-reserved pouring hole on the top surface of the inner mold, pour the bottom slab concrete, and level and vibrate it in time to ensure compaction; 6) After replenishing the bottom slab concrete, accurately control the top surface elevation, vibrate and level it to meet the design requirements; Step 2: Pour the top slab. 1) The concrete is poured continuously from both ends of the top slab toward the middle, and then closed at the mid-span. 2) After the bridge is closed, the top layer of concrete for the bridge deck is poured from one end to the other to facilitate surface finishing and ensure flatness.

[0022] It should be noted that the pouring sequence is as follows: first, chamfer the bottom and web slabs, then the bottom slab, then the web slab, and finally the top slab. Two concrete placing booms are used to place the concrete at an angle and pour it continuously. The concrete is poured horizontally in layers, symmetrically at the same height, and formed in one go. The thickness of each layer should not exceed 30cm, and the interval between pouring two layers of concrete should not exceed 45 minutes.

[0023] Furthermore, during the pouring process, designated personnel should inspect the formwork, attached vibrators, and reinforcing bars. Any loose bolts or supports should be tightened and secured promptly. Any grout leakage should be plugged immediately, and any displacement of reinforcing bars or embedded parts should be adjusted to ensure correct positioning.

[0024] When pouring concrete into the formwork, the material should be poured evenly, and attention should be paid to coordinating it with vibration. The vibration and pouring of concrete should be carried out alternately. Each time the concrete is poured, the attached vibrator on the corresponding section should be turned on.

[0025] When pouring concrete for the bottom web slab, the discharge port must not be directly opposite the prestressing hose or the outer formwork flange. Concrete residue adhering to the flange should be removed promptly before pouring concrete onto the flange to prevent the formation of dry ash, slag inclusions, and pitted surfaces at the bottom of the flange.

[0026] To prevent a large amount of material from gushing out of the inner box during concrete pouring, the aforementioned diversion box should be used to stop the material gushing out when pouring the web and end concrete.

[0027] The height of the concrete discharge port from the concrete pouring surface should not exceed 2m.

[0028] Furthermore, the concrete vibration process employs a combination of immersion vibrators and attached vibrators. Immersion vibrators should be the primary method, supplemented by side vibration when necessary. To meet concrete quality requirements, high-frequency vibrators are installed on the bottom, side, and end forms. These vibrators are activated during concrete pouring according to the material distribution to ensure concrete density. During pouring, special attention should be paid to strengthening vibration at the box girder ends, chamfers, and areas with dense reinforcement, especially in areas with small working surfaces and poor conditions, particularly at corners, the interface between the web and bottom slab, and controlling the bottom slab elevation. When operating immersion vibrators, they should be inserted quickly and withdrawn slowly, vibrating vertically, avoiding horizontal pulling, ensuring no areas are missed, and preventing over-vibration. The vibrator insertion points should be evenly spaced, and the vibrator's movement distance should cover the edge of the vibrated section. The vibrator's movement distance should not exceed 1.5 times its effective radius and should not exceed 400mm. When vibrating the web concrete, the insertion point spacing should be controlled at 30cm. When vibrating the top slab concrete, the insertion point spacing can be adjusted appropriately according to the spacing of the upper layer of reinforcement in the top slab. When vibrating the top slab concrete, the vibrator insertion points can be moved in a "quincunx" pattern to avoid missed vibration and repeated vibration. The vibration time for a single point is about 20 to 30 seconds. During vibration, the vibrator should be moved up and down slightly. The insertion depth of the vibrator should be 5 to 10 cm below the surface of the previously poured concrete. The vibration should be stopped when the concrete surface no longer sinks significantly, no large air bubbles appear, and laitance appears on the surface. When using the vibrator, it should not be vibrated close to the formwork. It should be kept 5 to 10 cm away from the side formwork, and collisions with reinforcing bars and rubber tubes should be avoided as much as possible.

[0029] Furthermore, after the bridge deck concrete is poured to the design elevation, it should be promptly compacted and smoothed to ensure drainage slope and flatness. A screed leveling machine should be used to level the surface, followed by finishing with a finishing frame to ensure drainage slope and flatness. A second finishing process must be performed on the bridge deck before the concrete initially sets. Water should not be sprinkled during finishing, and excessive operation should be avoided to prevent affecting the surface concrete quality, thus preventing cracks and unevenness. The concrete surface should not be stepped on before initial setting after finishing. A finishing frame is used for finishing the inner side of the retaining wall, while manual finishing is used for the outer side. A second finishing process is performed one hour after the first finishing. The screed leveling machine operates as follows: The size of the bottom leveler of the screed leveling machine is adjusted in advance according to the drainage slope of the beam top. Before concrete construction, the screed leveling machine is installed on the rails of the side formwork flanges. After the top slab concrete is vibrated by the vibrator, the vibrating beam is activated to generate vibration force through the attached vibrators mounted on it. Under the action of its own weight and excitation force, the vibrating beam spreads the concrete and vibrates it again to raise the slurry and compact the concrete surface. The vibrating beam should be moved slowly and steadily, and its moving speed and the number of repeated vibrations should be determined according to the slump of the concrete. Post-construction cleanup: After pouring, disconnect the power supply, clean the mixer and all concrete containers, and sweep the site; remove the vibrator control cabinet, dismantle and clean the concrete delivery pipe and concrete delivery pump; immediately cover the beam concrete with geotextile after the beam concrete is poured; after the beam concrete has initially set, promptly pull out the hole-forming tools for the hoisting holes, ventilation holes, and static load test reserved holes; based on field experience, it is appropriate to pull out the rubber extraction tube about 4 to 6 hours after the concrete is poured, when the concrete surface is "not soft under light pressure, not sinking under heavy pressure, the slurry is not sticky to the hand, and no mark is visible".

[0030] In the above construction method, to further avoid the formation of dry ash, slag inclusions, and pitting at the bottom of the flange during pouring, this embodiment of the invention provides a self-propelled box girder web concrete diversion device, comprising a track, a self-propelled mechanism, and a diversion box. The track is formed by splicing multiple guide rail frames 2. Each guide rail frame 2 includes two parallel fixed plates 21 for fixing on the construction site. The two fixed plates 21 are fixedly connected by a connecting beam 14. Rails 22 are fixedly connected to the fixed plates 21, and limit grooves 23 are provided on the rails 22. The self-propelled mechanism is assembled to drive the frame 1 to slide on the track. The self-propelled mechanism includes the frame 1 and multiple drive wheels 3, each rotatably connected to the frame 1. Each drive wheel 3 has an annular groove 4 for the rail 22 to engage, and a limiting slip ring 5 is fixedly connected within the annular groove 4 to slide in conjunction with a limiting slide groove 23. A flow guide box 7 is mounted on the self-propelled mechanism via a detachable mechanism. The flow guide box 7 is wider at the top and narrower at the bottom, with concrete flowing from the wide end to the narrow end of the flow guide box 7. It should be noted that the multiple wheels are rectangularly distributed on the frame 1.

[0031] The self-propelled mechanism also includes a control box 8, which is fixedly connected to the frame 1. The controller inside the control box 8 is electrically connected to the drive source of the drive wheels 3. Under the control of the controller, each drive wheel 3 can drive the frame 1 to move along the length of the corresponding guide rail 2.

[0032] It should be noted that the controller and drive wheel 3 inside the control box 8 are common knowledge in the field, and their working principles are well-known technologies. The appropriate model is selected according to the actual use. The control principles of the control box 8 and drive wheel 3 are clear to those skilled in the art, and will not be described in detail here.

[0033] The connecting beam between the two fixed plates 21 includes a crossbeam, a first inclined beam, and a second inclined beam. The connecting beam allows the track to be laid stably on the construction site, increases the contact area between the track and the construction site, and thus enables the self-propelled mechanism to move stably on the track. The connecting beam and the fixed plates are fixedly connected by welding.

[0034] A rubber pad is fixedly connected to the circumferential side of the limiting slip ring 5. This increases friction and improves sliding stability.

[0035] In this system, any two adjacent guide rail frames 2 are connected by a docking mechanism. This docking mechanism includes a docking groove 12 on one end of a fixed plate, and a docking post 13 fixedly connected to the other end of the fixed plate to dock with the docking groove 12. The insertion end of each docking post 13 is hemispherical. It should be noted that the diameter of the hemisphere is slightly smaller than the diameter of the docking post 13, and the connection between the hemispherical insertion end and the docking post 13 is chamfered to facilitate guidance of the docking post and smoother insertion into the corresponding docking groove 12. Specifically, during assembly, the docking post 13 on one of the two adjacent guide rail frames 2 is docked into the corresponding docking groove 12 of the other guide rail frame 2, facilitating installation and improving the reusability of the device.

[0036] Specifically, during operation, concrete is first poured into the guide box 7, allowing it to flow from the wide end to the narrow end, thus completing the pouring. The guide box 7 effectively prevents concrete slurry from splashing onto the web or flange formwork, avoiding the formation of noticeable dry ash, slag inclusions, and rough surfaces after solidification, and further ensuring the final concrete structure meets aesthetic standards. Based on this, under the control of the controller in the control box 8, the drive wheels 3, rotatably connected to the frame 1, move along their corresponding guide rails 2, allowing the guide box 7 to synchronously follow the frame 1. The entire process requires only operator intervention, eliminating the need for manual pulling, thus reducing workload and allowing for extended pouring operations. The design of the limiting slip ring 5 and limiting groove 23 prevents the frame 1 from shifting during movement, enabling more precise pouring operations.

[0037] The detachable mechanism includes four locking units 9 arranged in a rectangular pattern. Each locking unit 9 includes: a guide groove 91 formed on the frame 1; a guide strip 92 fixedly connected to the air deflector 7 and capable of engaging with the corresponding guide groove 91; a locking pin 93 threadedly connected to the frame 1; and a locking hole 94 formed on the air deflector 7. The guide groove 91 and guide strip 92 facilitate the installation of the air deflector 7 onto the frame 1, and also facilitate the subsequent alignment of the locking pin 93 with the locking hole 94 to complete the locking operation.

[0038] Each limiting groove has a threaded passage 10, and a threaded tube 11 is fixedly connected to the corresponding locking pin 93. The peripheral side of the threaded tube 11 is threaded with threads that mate with the threads of the threaded passage 10. It should be noted that when the threads on the threaded tube 11 rotate with the threads in the threaded passage 10, the locking pin 93 can be inserted into the locking hole 94, thus completing the locking operation. Therefore, the diameter of the threaded tube 11 is larger than the diameter of the locking pin 93, and the two ends of the threaded passage 10 have slides adapted to the locking pin 93, preventing the locking pin 93 from falling off the frame 1.

[0039] The frame 1 is equipped with multiple cleaning components that correspond one-to-one with each drive wheel 3. Each cleaning component includes a cleaning unit 6 located on the front and rear sides of the corresponding drive wheel 3. The cleaning unit 6 includes a limit rod 61 fixedly connected via an extension frame. The bottom of the limit rod 61 is fixedly connected to a cleaning plate 62 located in the corresponding limit groove 23.

[0040] Each cleaning plate 62 has a first inclined surface 63, which faces the forward direction of the corresponding drive wheel 3.

[0041] It should be noted that a barrier plate 64 is fixedly connected to the limiting rod 61. The barrier plate 64 has two symmetrically arranged guide slopes 65. The inclination direction of the guide slopes 65 is downward and outward from the center of the barrier plate 64.

[0042] Specifically, during the forward movement of the self-propelled mechanism, impurities (such as concrete residue) located in the limiting groove 23 will be cleaned by the corresponding cleaning plate 62 and rolled out of the limiting groove 23 along the first inclined surface 63 and the guide inclined surface, thereby effectively preventing the driving wheels 3 of the self-propelled mechanism from getting stuck during the movement.

[0043] In a preferred embodiment of the present invention, such as Figure 6-7 As shown, baffles 15 are symmetrically arranged at the discharge port of the guide box 7, and each baffle 15 is fixedly installed on the guide box 7 at an angle. It should be noted that the distance between the lower ends of the two baffles 15 is smaller than the distance between the upper ends of the two baffles 15. Based on this, the discharge space at the discharge port of the guide box 7 can be reduced, which can further prevent concrete from leaking out to the web of the box girder.

[0044] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A construction method, characterized in that, The process includes laying tracks along the length of the box girder web, assembling a self-propelled mechanism with a guide box onto the tracks, and placing the concrete outlet inside the guide box. During pouring, two concrete placing booms are used to place the concrete obliquely and pour it continuously, with horizontal layers poured symmetrically at the same height, forming a single pour. The specific construction steps are as follows: Step 1: Cast the bottom web. 1) Start from both sides of the box girder webs simultaneously, and cut the concrete evenly and symmetrically to ensure that the concrete height on both sides is basically the same and to avoid the inner formwork shifting. 2) The concrete pouring of the web plate on the same side is carried out longitudinally and closed near 1 / 4 span (6-8m) to ensure the structural stress is balanced; 3) First pour the concrete at the joint between the web and the bottom slab, then pour the web concrete to ensure a tight joint; 4) Vibrate the web concrete in layers, controlling the height of each layer, and pause when pouring to the interface with the top slab; 5) Pour the concrete through the pre-reserved pouring hole on the top surface of the inner mold, pour the bottom slab concrete, and level and vibrate it in time to ensure compaction; 6) After replenishing the bottom slab concrete, accurately control the top surface elevation, vibrate and level it to meet the design requirements; Step 2: Pour the top slab. 1) The concrete is poured continuously from both ends of the top slab toward the middle, and then closed at the mid-span. 2) After the bridge is closed, the top layer of concrete for the bridge deck is poured from one end to the other to facilitate surface finishing and ensure flatness.

2. A self-propelled box girder web concrete diversion device, used to implement the construction method described in claim 1, characterized in that, include: The track is formed by splicing multiple guide rail frames. Each guide rail frame includes two parallel fixed plates for fixing on the construction site. Rails are fixedly connected to the fixed plates, and limit grooves are provided on the rails. The self-propelled mechanism is assembled to drive the frame to slide on the track. The self-propelled mechanism includes the frame and multiple drive wheels. Each drive wheel is rotatably connected to the frame. Each drive wheel has an annular groove for the rail to be inserted into. A limiting slip ring that slides with the limiting slip groove is fixedly connected in the annular groove. The flow guide box is mounted on the self-propelled mechanism via a detachable mechanism. The flow guide box is wider at the top and narrower at the bottom, and the concrete flows from the wide end of the flow guide box to the narrow end.

3. The self-propelled box girder web concrete diversion device according to claim 2, characterized in that, The two fixed plates are fixedly connected by a connecting beam.

4. A self-propelled box girder web concrete diversion device according to claim 2, characterized in that, The self-propelled mechanism also includes a control box, which is fixedly connected to the frame. The controller inside the control box is electrically connected to the drive source of the drive wheels. Under the control of the controller, each drive wheel can drive the frame to move along the corresponding guide rail.

5. A self-propelled box girder web concrete diversion device according to claim 2, characterized in that, The detachable mechanism includes four locking units arranged in a rectangular pattern. Each locking unit includes: Guide slots are formed on the vehicle frame; The guide bar is fixedly connected to the flow guide box and can be inserted and matched with the corresponding guide groove; Locking pin, which is threadedly rotatably connected to the frame; The keyhole is located on the air deflector.

6. A self-propelled box girder web concrete diversion device according to claim 2, characterized in that, Each guide rail frame is spliced ​​between any two adjacent guide rail frame segments by a docking mechanism. The docking mechanism includes a docking groove on one end of a fixed plate, and a docking post that docks with the docking groove is fixedly connected to the other end of the fixed plate. During installation, the docking post on one of the adjacent guide rail frame segments is inserted into the docking groove of the other guide rail frame segment, and the insertion end of each docking post is hemispherical.

7. A self-propelled box girder web concrete diversion device according to claim 2, characterized in that, The frame is equipped with multiple cleaning components that correspond one-to-one with each drive wheel. Each cleaning component includes a cleaning unit located on the front and rear sides of the corresponding drive wheel. The cleaning unit includes a limit rod fixedly connected via an extension frame. The bottom of the limit rod is fixedly connected to a cleaning plate located in the corresponding limit groove.

8. A self-propelled box girder web concrete diversion device according to claim 2, characterized in that, Each cleaning plate has a first ramp, which faces the direction of travel of the corresponding drive wheel.

9. A self-propelled box girder web concrete diversion device according to claim 7, characterized in that, Each limiting groove has a threaded passage, and a threaded tube is fixedly connected to the corresponding locking pin. The circumferential side of the threaded tube is threaded with threads that mate with the threaded passage.

10. A self-propelled box girder web concrete diversion device according to claim 5, characterized in that, A barrier plate is fixedly connected to the limit rod. The barrier plate has two symmetrically arranged guide ramps. The guide ramps are inclined downwards from the center of the barrier plate.

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