Bottom-wrapping platform for steel box composite beam

Abstract

The invention discloses a steel box composite beam bottom-holding platform which comprises a framework, positioning columns, barrier strips and steel hanging belts are welded to the upper surface of the framework, the number of the barrier strips is two, a middle plate and edge plates are arranged between the two barrier strips, the middle plate can be spliced with the edge plates, the middle plate and the edge plates are both connected with the positioning columns in an inserted mode, and the steel hanging belts are connected with the positioning columns in an inserted mode. The upper end of the steel sling can be connected with the steel box combined bridge; according to the steel box combination beam bottom-carrying platform, the framework is welded into a grid shape through channel steel in a fragmented mode, then the anti-skid middle plates and the anti-skid side plates are densely laid, the framework and the beam bottom are welded through the steel hanging belts, and the bottom-carrying platform under a bridge is formed; under the condition that passing clearance of vehicles under the bridge is guaranteed, workers can walk and work on the bottom-carrying platform, the structure is safe and reliable, mounting and dismounting are convenient, the whole platform is manufactured in advance, and the advantages of being light in weight, convenient to hoist, rapid in welding and the like are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, in particular to a steel box composite beam bottom support platform. Background Art

[0002] Steel box composite beams are a conventional structure currently used in span bridges in municipal engineering projects. Most span bridges cross urban main roads with heavy traffic. If on-site construction conditions permit, the steel box composite beams can be divided into longitudinal and transverse sections, and then temporary piers can be erected. They can be hoisted in situ using a truck crane and then welded into a bridge. The hoisting of temporary piers and steel beams requires traffic diversion at night when traffic flow is low, and fully enclosed construction is required.

[0003] At the same time, when welding, testing and painting operations are carried out across the line segment after the steel beam is hoisted, traditional protective facilities use a scaffolding structure, and steel pipe columns need to be erected on the road construction foundation. The scaffolding protection structure is limited by the material and has a limited span. The steel columns and foundation will affect the road traffic flow and reduce road traffic efficiency. For this reason, we proposed a steel box composite beam bottom platform. Summary of the Invention

[0004] The purpose of the present invention is to provide a steel box composite beam bottom support platform to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a steel box composite beam bottom platform, comprising a frame, the upper surface of the frame is respectively welded with a positioning column, a stop bar and a steel sling, the stop bar is provided with two, a middle plate and an edge plate are provided between the two stop bars, the middle plate can be spliced ​​with the side plate, and the middle plate and the side plate are both plugged into the positioning column, the upper end of the steel sling can be connected to the steel box composite bridge; a guardrail assembly is provided on the stop bar, and the guardrail assembly includes a first node seat fixed to the upper surface of the stop bar, a transverse rod and a second node seat fixed to the lower surface of the transverse rod, a vertical rod is provided between the first node seat and the second node seat, the two ends of the vertical rod are respectively rotatably connected to the first node seat and the second node seat, the end of the transverse rod is provided with a connecting tube, a central axis is rotatably provided inside the transverse rod, and a convex plate is fixedly installed on the side wall of the inner cavity of the transverse rod, and the transverse The top end face of said sliding panel also is provided with an inserting rod, and said inserting rod can be inserted into the vertical rod, and said first spring is provided between said convex plate and said expansion plate, and said inserting rod can be inserted into the vertical rod, and said first spring is provided between said convex plate and said expansion plate, and a short connecting rod is provided between said central axis and said expansion plate. A bearing for rotatably connecting with said transverse rod is provided on the side of said connecting tube, and a fixing rod is fixedly installed inside said connecting tube, and said fixing rod is fixedly connected to the central axis; a limiting assembly is provided on said side plate, and said limiting assembly includes a sliding seat and a ball head rod slidably arranged on the side plate, and a connecting plate is fixedly installed on the rod body of said ball head rod, a second spring is fixedly installed on the side of said connecting plate, and the end of said ball head rod can be inserted into the positioning column, a protrusion is fixedly installed on the side of said sliding seat, and a third spring is fixedly installed on the side of said protrusion

[0006] Preferably, the middle plate is designed as a T-shaped structure, and the side plates are located on the sides of the middle plate.

[0007] Preferably, the skeleton is formed by welding a plurality of channel steels into one piece, and the skeleton has a grid-shaped structure design.

[0008] Preferably, the side ends of the vertical rods adjacent to the blocking bars are designed to be at right angles, and the bottom surface of the vertical rods can be in contact with the blocking bars.

[0009] Preferably, both ends of the first spring are fixedly connected to the convex plate and the expansion plate respectively.

[0010] Preferably, both ends of the short connecting rod are rotatably connected to the central shaft and the expansion plate respectively.

[0011] Preferably, a shield is fixedly mounted on the side of the connecting cylinder, and the bearing is located in the inner cavity of the shield.

[0012] Preferably, the end of the second spring is also fixedly connected to the edge plate, and the end of the third spring is also fixedly connected to the edge plate.

[0013] Preferably, a sliding groove with closed design at both ends is provided on the edge plate, and the pull rod and the sliding seat are both located inside the sliding groove.

[0014] Preferably, there is a gap between the pull rod and the side wall of the slide groove, and the corners of the slide seat are all rounded.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, the skeleton is welded into a grid shape by segmented channel steel, and then non-slip middle plates and side plates are densely laid. The skeleton is welded to the bottom of the beam by steel slings to form a bottom platform under the bridge. Workers can walk and work on the bottom platform while ensuring the clearance for vehicles to pass under the bridge. The structure is safe and reliable, and it is easy to install and dismantle. The entire platform is manufactured in advance and has the advantages of light weight, easy lifting, and fast welding.

[0017] 2. The present invention improves the safety of the entire platform by adding a guardrail assembly to the guard bar. At the same time, the guardrail assembly can be flexibly folded to improve the practicality of the overall structure. A limit assembly is also set on the side plate to strengthen the stability of the connection between the side plate and the frame, so as to provide workers with a stable working platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is an exploded view of the overall structure of the present invention;

[0020] Figure 3 This is an exploded view of the vertical rod structure of the present invention;

[0021] Figure 4 This is a schematic cross-sectional view of the transverse rod structure of the present invention;

[0022] Figure 5 This is an exploded view of the bearing structure of the present invention;

[0023] Figure 6 This is a side view of the connecting tube structure of the present invention;

[0024] Figure 7 This is a schematic cross-sectional view of the edge plate structure of the present invention;

[0025] Figure 8 This is an exploded view of the third spring structure of the present invention.

[0026] In the figure: 1. Skeleton; 2. Positioning column; 3. Middle plate; 4. Side plate; 5. Baffle; 6. Steel sling; 7. Guardrail assembly; 71. First node seat; 72. Vertical rod; 73. Horizontal rod; 74. Second node seat; 75. Connecting tube; 76. Insert rod; 77. Expansion plate; 78. First spring; 79. Protruding plate; 710. Center axis; 711. Short connecting rod; 712. Bearing; 713. Shield; 714. Fixed rod; 8. Limiting assembly; 81. Pull rod; 82. Sliding seat; 83. Bump; 84. Ball head rod; 85. Second spring; 86. Connecting plate; 87. Long connecting rod; 88. Third spring. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-8 The present invention provides a technical solution: a steel box composite beam bottom platform, including a frame 1, the upper surface of the frame 1 is welded with positioning columns 2, baffles 5 and steel slings 6, there are two baffles 5, a middle plate 3 and an edge plate 4 are arranged between the two baffles 5, the middle plate 3 can be spliced ​​with the edge plate 4, and the middle plate 3 and the edge plate 4 are both plugged into the positioning columns 2, and the upper end of the steel sling 6 can be connected to the steel box composite bridge; the middle plate 3 is a T-shaped structure design, and the edge plate 4 is located on the side of the middle plate 3, so that the middle plate 3 and the edge plate 4 can overlap each other without generating any gaps. The frame 1 is formed by welding multiple channel steels into one piece, and the frame 1 is a grid-shaped structure design.

[0029] The guardrail assembly 7 is provided on the baffle 5. The guardrail assembly 7 includes a first node seat 71 fixed to the upper surface of the baffle 5, a transverse rod 73 and a second node seat 74 fixed to the lower surface of the transverse rod 73. A vertical rod 72 is provided between the first node seat 71 and the second node seat 74. The two ends of the vertical rod 72 are rotatably connected to the first node seat 71 and the second node seat 74 respectively. A connecting cylinder 75 is provided at the end of the transverse rod 73. A central axis 710 is rotatably provided inside the transverse rod 73, and a convex plate 79 is fixedly installed on the side wall of the inner cavity of the transverse rod 73, and an expansion plate 77 is also slidably provided inside the transverse rod 73. A plug rod 76 is fixedly installed on the lower surface of the expansion plate 77, and the plug rod 76 can be plugged with the vertical rod 72. A first spring 78 is provided between the convex plate 79 and the expansion plate 77, a short connecting rod 711 is provided between the central axis 710 and the expansion plate 77, and a side of the connecting cylinder 75 is provided. The cam 714 is fixedly mounted on the inside of the connecting tube 75, and the fixing rod 714 is fixedly connected to the central axis 710; the side ends of the vertical rod 72 and the adjacent ends of the baffle 5 are designed at right angles, and the bottom surface of the vertical rod 72 can contact the baffle 5, which can limit the rotation angle of the vertical rod 72 and ensure the vertical state of the vertical rod 72 after rotation, so as to ensure the protective effect of the entire guardrail assembly 7, improve the safety of the overall device, and meet the actual application requirements. The two ends of the first spring 78 are fixedly connected to the convex plate 79 and the expansion plate 77 respectively, and the two ends of the short connecting rod 711 are rotatably connected to the central axis 710 and the expansion plate 77 respectively. A shield 713 is also fixedly mounted on the side of the connecting tube 75, and the bearing 712 is located in the internal cavity of the shield 713. The shield 713 can prevent dust from entering the bearing 712 and ensure the flexibility of the bearing 712.

[0030] A limit assembly 8 is provided on the edge plate 4. The limit assembly 8 includes a slide 82 and a ball rod 84 slidably provided on the edge plate 4. A connecting plate 86 is fixedly installed on the rod body of the ball rod 84. A second spring 85 is fixedly installed on the side of the connecting plate 86. The end of the ball rod 84 can be plugged into the positioning column 2. A protrusion 83 is fixedly installed on the side of the slide 82. A third spring 88 is fixedly installed on the side of the protrusion 83. A long connecting rod 87 is also rotatably connected to the slide 82. The end of the long connecting rod 87 away from the slide 82 is rotatably connected to the pull rod 81, the end of the second spring 85 is also fixedly connected to the edge plate 4, and the end of the third spring 88 is also fixedly connected to the edge plate 4. A sliding groove with closed ends is provided on the edge plate 4. The pull rod 81 and the slide 82 are both located inside the sliding groove. There is a gap between the pull rod 81 and the side wall of the sliding groove. The remaining gap can make it easier for workers to pick up the pull rod 81, which is convenient for actual operations. The edges and corners of the slide 82 are all rounded, which makes it easier for the slide 82 to squeeze the ball head rod 84 to prompt the ball head rod 84 to slide into the positioning column 2.

[0031] Working principle: the frame 1 is welded into a grid shape with channel steel, and then the positioning columns 2 and the baffles 5 are welded on the frame 1 respectively. The middle plate 3 and the side plate 4 are stacked on the frame 1 in turn through the positioning columns 2 and the baffles 5 to form a bottom platform. Then, the steel slings 6 welded on the frame 1 are used to hoist and fix the entire bottom platform to the bottom of the bridge. At this time, workers can weld, inspect and paint the steel beams of the bridge on the bottom platform. In order to facilitate the dismantling of the bottom platform, when the limit assembly 8 is folded up, the rotation utilizes the connecting cylinder 75 that is rotatably connected to the horizontal rod 73 by the bearing 712, and the central axis 710 fixedly connected to the connecting cylinder 75 by the fixing rod 714 rotates together inside the horizontal rod 73, because When the locking cam 73 is in the unlocked position, the locking cam 73 is in the unlocked position, and the winch 73 is unlocked, so that the winch 73 can be unlocked. The cam 79 of the cam 73 is fixed to the inner side of the cam 77, and the cam 79 of the cam 77 is fixed to the inner side of the cam 77. The cam 79 of the cam 77 is fixed to the inner side of the cam 77, and the cam 79 of the cam 77 is fixed to the inner side of the cam 77. The cam 79 of the cam 77 is fixed to the inner side of the cam 77, and the cam 79 of the cam 77 is fixed to the inner side of the cam 77. The rod 84 loses its restriction because the connecting plate 86 fixed on the ball head rod 84 is connected by the second spring 85. Under the elastic force of the second spring 85, the ball head rod 84 slides in the direction away from the positioning column 2, and the ball head rod 84 is separated from the positioning column 2. At this time, the pull rod 81 can be used to lift the edge plate 4 and remove the edge plate 4. After loosening the pull rod 81, under the action of the third spring 88 whose two ends are respectively fixed to the protrusion 83 fixed on the slide 82 and the edge plate 4, the slide 82 slides back, and the ball head end of the ball head rod 84 is squeezed. The other end of the ball head rod 84 can be inserted into the positioning column 2 again, and at the same time, the pull rod 81 can be placed in the receiving groove on the edge plate 4, thereby ensuring the flatness of the upper surface of the edge plate 4.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A steel box composite beam bottom platform, characterized by: It comprises a frame (1), the upper surface of which is respectively welded with a positioning column (2), a baffle (5) and a steel sling (6), two baffles (5) are provided, a middle plate (3) and an edge plate (4) are provided between the two baffles (5), the middle plate (3) can be spliced ​​with the edge plate (4), and the middle plate (3) and the edge plate (4) are both plugged into the positioning column (2), and the upper end of the steel sling (6) can be connected to the steel box combined bridge; The guardrail assembly (7) is provided on the blocking bar (5), and the guardrail assembly (7) includes a first node seat (71) fixed on the upper surface of the blocking bar (5), a transverse rod (73) and a second node seat (74) fixed on the lower surface of the transverse rod (73). A vertical rod (72) is provided between the first node seat (71) and the second node seat (74). The two ends of the vertical rod (72) are respectively connected to the first node seat (71) and the second node seat (74) for rotation. A connecting tube (75) is provided at the end of the transverse rod (73). A central axis (710) is provided for rotation inside the transverse rod (73), and a convex screw is fixedly installed on the side wall of the inner cavity of the transverse rod (73). Plate (79), and an expansion plate (77) is also slidably provided inside the transverse rod (73), an insertion rod (76) is fixedly installed on the lower surface of the expansion plate (77), and the insertion rod (76) can be plugged into the vertical rod (72), a first spring (78) is provided between the convex plate (79) and the expansion plate (77), a short connecting rod (711) is provided between the central shaft (710) and the expansion plate (77), a bearing (712) for rotationally connecting with the transverse rod (73) is provided on the side of the connecting tube (75), and a fixing rod (714) is fixedly installed inside the connecting tube (75), and the fixing rod (714) is fixedly connected to the central shaft (710); A limiting assembly (8) is provided on the edge plate (4), and the limiting assembly (8) includes a slide seat (82) and a ball head rod (84) slidably provided on the edge plate (4), a connecting plate (86) is fixedly installed on the rod body of the ball head rod (84), a second spring (85) is fixedly installed on the side of the connecting plate (86), the end of the ball head rod (84) can be plugged into the positioning column (2), a protrusion (83) is fixedly installed on the side of the slide seat (82), a third spring (88) is fixedly installed on the side of the protrusion (83), and a long connecting rod (87) is also rotatably connected to the slide seat (82), and the end of the long connecting rod (87) away from the slide seat (82) is rotatably connected to the pull rod (81).

2. The steel box composite beam bottom support platform according to claim 1, characterized in that: The middle plate (3) is designed as a T-shaped structure, and the side plates (4) are located on the side surfaces of the middle plate (3).

3. The steel box composite beam bottom support platform according to claim 1, characterized in that: The frame (1) is formed by welding a plurality of channel steels into one piece, and the frame (1) is designed as a grid-shaped structure.

4. The steel box composite beam bottom support platform according to claim 1, characterized in that: The side ends of the vertical rod (72) and the adjacent ends of the blocking bar (5) are designed to be at right angles, and the bottom surface of the vertical rod (72) can contact the blocking bar (5).

5. The steel box composite beam bottom support platform according to claim 1, characterized in that: The two ends of the first spring (78) are fixedly connected to the convex plate (79) and the expansion plate (77) respectively.

6. The steel box composite beam bottom support platform according to claim 1, characterized in that: The two ends of the short connecting rod (711) are rotatably connected to the central shaft (710) and the expansion plate (77) respectively.

7. The steel box composite beam bottom support platform according to claim 1, characterized in that: A shield (713) is also fixedly mounted on the side of the connecting cylinder (75), and the bearing (712) is located in the inner cavity of the shield (713).

8. The steel box composite beam bottom support platform according to claim 1, characterized in that: The end of the second spring (85) is also fixedly connected to the edge plate (4), and the end of the third spring (88) is also fixedly connected to the edge plate (4).

9. The steel box composite beam bottom support platform according to claim 1, characterized in that: The edge plate (4) is provided with a sliding groove with both ends being closed, and the pull rod (81) and the sliding seat (82) are both located inside the sliding groove.

10. The steel box composite beam bottom support platform according to claim 9, characterized in that: There is a gap between the pull rod (81) and the side wall of the slide groove, and the corners of the slide seat (82) are all rounded.

Images