Box girder hole protection device at beam transportation passage

Abstract

The present application relates to the technical field of box girder hole protection at beam transportation channel, in particular to a box girder hole protection device at beam transportation channel, which comprises a device body, the device body comprises a bottom plate, a limiting plate part in the shape of a ring is arranged at the lower end face of the bottom plate, the limiting plate part is used for being placed in the hole opening to form limiting for the bottom plate; the limiting plate part comprises symmetrically arranged first limiting plates, a second limiting plate is symmetrically arranged between the first limiting plates; the first limiting plates and the second limiting plate are orthogonal, the two ends of the second limiting plate form sliding fit with the first limiting plates. Specifically, in use, the device body in the present application is first transported to the hole opening by the staff, then the limiting plate part is placed in the hole opening, the limiting plate part in the shape of a ring can form limiting fit with the inner side wall of the hole opening, so as to effectively avoid the whole device body from being crushed and displaced by vehicles during beam transportation.

Description

Technical Field

[0001] This invention relates to the field of box girder hole protection technology in beam transport channels, and more specifically, to a box girder hole protection device in beam transport channels. Background Technology

[0002] When erecting prestressed small box girder bridges using the machine method, the two already erected sides are usually used as girder transport channels. However, at this time, the wet joints on the girder surface are generally not yet constructed, and the negative bending moment tensioning slots are not yet closed. To ensure the safety of box girder transportation, it is necessary to temporarily seal and protect each slot and hole to allow the girder transport vehicle to move.

[0003] In the past, the method of directly covering the slots and holes with steel plates was usually used to seal them. However, this method could not guarantee the accurate placement of the steel plates. They were easily displaced by vehicles during the transport of the beams, and hoisting and transportation were difficult after use. Summary of the Invention

[0004] This invention provides a protective device for the holes in box girders at the beam transport channel, which can overcome some or all the defects of the prior art.

[0005] According to the present invention, a protective device for box girder holes in a beam transport channel includes a device body, the device body including a base plate, and a ring-shaped limiting plate portion provided on the lower end face of the base plate. The limiting plate portion is used to be placed in the hole to limit the base plate. The limiting plate portion includes symmetrically arranged first limiting plates, and symmetrically arranged second limiting plates between the first limiting plates. The first limiting plates and the second limiting plates are orthogonal, and the two ends of the second limiting plates are in sliding fit with the first limiting plates.

[0006] Specifically, when using the device body of the present invention, the workers first transport the entire device body to the opening, and then place the limiting plate part inside the opening. The annular limiting plate part (the upper end of the first limiting plate is welded to the bottom plate through an extension plate) can form a limiting fit with the inner side wall of the opening, so as to effectively prevent the entire device body from being crushed and displaced by vehicles during the beam transportation process. At the same time, under the limiting support of the limiting plate part, the upper surface of the bottom plate can better serve as the transportation path of the vehicle during the beam transportation process, so as to eliminate the obstruction of the opening to the beam transportation vehicle.

[0007] Preferably, the upper surface of the base plate is provided with lifting rings around the perimeter. The lifting rings are used to connect and cooperate with the wire rope buckles of the crane to lift the device body to the opening.

[0008] Understandably, workers can use lifting rings and a crane to hoist the entire device body to the opening and accurately insert the limiting plate into the opening. However, due to the manufacturing error of the opening size, the overall size of the limiting plate needs to be slightly smaller than the opening size. Both the first and second limiting plates need to maintain a certain distance from the inner wall to facilitate installation. However, while facilitating installation, it is difficult to form a very stable limiting position between the limiting plate of the entire device body and the opening. The base plate may still shift slightly due to being run over by vehicles during beam transportation.

[0009] Preferably, a through opening is formed on the upper surface of the base plate, and the extension direction of the through opening is consistent with that of the first limiting plate; a speed reduction plate with an arc-shaped upper surface is provided at the through opening, and an anti-slip groove is formed on the upper surface of the speed reduction plate; the speed reduction plate is installed on the upper surface of the base plate by multiple elastic columns, and the multiple elastic columns are used to vertically support the speed reduction plate on the upper side of the through opening.

[0010] Specifically, in this embodiment, a speed bump is installed on the upper side of the base plate. The speed bump provides guidance for the transport vehicle's path, ensuring it travels as close to the center of the base plate as possible, effectively preventing vehicles from passing over the sides and thus avoiding the base plate from tilting and shifting. Furthermore, the anti-slip grooves on the speed bump surface effectively prevent vehicles from slipping on the base plate surface (because the base plate is mostly made of steel, with a relatively smooth surface).

[0011] Preferably, multiple elastic columns form a first column column and a second column column, which are symmetrically arranged on both sides of the opening.

[0012] Preferably, the elastic columns in the first column and the second column are arranged in a linear array along the extension direction of the first limiting plate at the lower end face of the deceleration plate.

[0013] Specifically, the first and second columns can provide relatively stable support for the speed reduction plate.

[0014] Preferably, a pressure block is formed on the lower end face of the deceleration plate at the position between the first column and the second column. Both ends of the pressure block along the extension direction of the opening are formed with a first inclined surface. The side wall of the second limiting plate near the pressure block is formed with a second inclined surface. The second inclined surface is used to cooperate with the first inclined surface. The first inclined surface of the pressure block is used to press down the second inclined surface to press the second limiting plate against the inner wall of the opening.

[0015] Preferably, both ends of the second limiting plate are connected to a first sliding block. A first sliding groove is formed on the inner wall of the first limiting block near the second limiting plate. The first sliding groove and the first sliding block are in sliding engagement. A spring is provided at the bottom wall of the sliding groove. The spring is used to maintain the tendency of the first sliding block to retract inward.

[0016] Preferably, the second limiting plate includes a first plate and a second plate separated from each other. A mounting block is provided at the position of the bottom plate between the first plate and the second plate, and a second sliding groove is formed on the side wall of the mounting block. A second sliding block is formed on the side wall of the first plate and the second plate near the mounting block, which slides in cooperation with the second sliding groove.

[0017] Preferably, both the first and second sliding blocks are T-shaped.

[0018] As a preferred option, the base plate is made of 2.5cm thick steel plate, and the lifting ring is made of 16mm diameter round steel semi-circular ring. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the device body installed at the opening in Example 1, viewed from above.

[0020] Figure 2 This is a structural schematic diagram of the device body from a bottom-view perspective in Example 1;

[0021] Figure 3 for Figure 2 A structural diagram from another perspective;

[0022] Figure 4 for Figure 1 A schematic diagram of the structure of the device body installed at the opening, viewed from below.

[0023] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6 This is a top-view structural diagram of the first limiting plate, the second limiting plate, and the mounting block in Embodiment 1.

[0025] Figure 7 This is a schematic diagram of the structure of the first limiting block, the first sliding block, and the spring in Embodiment 1;

[0026] Figure 8 This is a schematic diagram of the pressure block in Example 1. Detailed Implementation

[0027] To further understand the content of this invention, the invention will be described in detail with reference to the embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0028] Example 1

[0029] This embodiment provides a protective device for box girder holes in a beam transport channel, which includes a device body 100. The device body 100 includes a base plate 110. The lower end face of the base plate 110 is provided with an annular limiting plate portion 210. The limiting plate portion 210 is used to be placed in the hole to limit the base plate 110. The limiting plate portion 210 includes symmetrically arranged first limiting plates 211 and symmetrically arranged second limiting plates 212 between the first limiting plates 211. The first limiting plates 211 and the second limiting plates 212 are orthogonal to each other, and the two ends of the second limiting plates 212 are in sliding fit with the first limiting plates 211.

[0030] Specifically, in this embodiment, when the device body 100 is in use, the staff first transports the entire device body 100 to the opening, and then places the limiting plate part 210 inside the opening. The annular limiting plate part 210 (the upper end of the first limiting plate 211 is welded to the bottom plate 110 through the extension plate 710) can form a limiting fit with the inner wall of the opening, so as to effectively prevent the entire device body 100 from being crushed and displaced by the vehicle during the beam transportation process. At the same time, under the limiting support of the limiting plate part 210, the upper surface of the bottom plate 110 can better serve as the transportation path of the vehicle during the beam transportation process, so as to eliminate the obstruction of the opening to the beam transportation vehicle.

[0031] In this embodiment, lifting rings 120 are provided around the upper surface of the base plate 110. The lifting rings 120 are used to connect and cooperate with the wire rope buckle of the crane to lift the device body 100 to the opening.

[0032] Understandably, workers can use the lifting ring 120 in conjunction with a crane to lift the entire device body 100 to the opening and accurately insert the limiting plate 210 into the opening. However, due to the processing error of the opening size, the overall size of the limiting plate 210 needs to be slightly smaller than the size of the opening. The first limiting plate 211 and the second limiting plate 212 need to maintain a certain distance from the inner wall to facilitate installation. However, while facilitating installation, it is difficult to form a very stable limiting position between the limiting plate 210 of the entire device body 100 and the opening. The base plate 110 may still be slightly displaced during the beam transportation process due to being run over by vehicles.

[0033] In this embodiment, a through opening 130 is formed through the upper end face of the base plate 110, and the extending direction of the through opening 130 is consistent with that of the first limiting plate 211; a deceleration plate 140 with an arc-shaped upper surface is provided at the through opening 130, and an anti-slip groove 141 is formed at the upper end face of the deceleration plate 140; the deceleration plate 140 is installed at the upper end face of the base plate 110 by a plurality of elastic columns 150, and the plurality of elastic columns 150 are used to vertically support the deceleration plate 140 on the upper side of the through opening 130.

[0034] Specifically, in this embodiment, a speed reduction plate 140 is installed on the upper side of the base plate 110. The speed reduction plate 140 can provide a guide for the transport vehicle to travel as close as possible to the center of the base plate 110, thereby effectively preventing the vehicle from passing through the sides of the base plate 110 and making it easier to lift and shift the base plate 110. In addition, the anti-slip grooves 141 on the surface of the speed reduction plate 140 can also better prevent the vehicle from slipping when traveling on the surface of the base plate 110 (because the base plate 110 is mostly made of steel plate, and the surface is relatively smooth).

[0035] Furthermore, in this embodiment, the speed reduction plate 140 is supported and installed by the elastic column 150. When a vehicle passes by, the speed reduction plate 140 can press down on the elastic column 150 to form a buffer and slow down the vehicle to prevent it from passing through the device body 100 at a high speed, thereby better ensuring the positional stability of the entire device body 100 and the safety of vehicle transportation.

[0036] In this embodiment, multiple elastic columns 150 form a first column column and a second column column, which are symmetrically arranged on both sides of the opening 130.

[0037] In this embodiment, the elastic columns 150 in the first column and the second column are arranged in a linear array along the extension direction of the first limiting plate 211 at the lower end face of the deceleration plate 140.

[0038] Specifically, the first and second columns can provide relatively stable support for the speed reduction plate 140.

[0039] In this embodiment, a pressure block 310 is formed protruding from the lower end face of the deceleration plate 140 at the position between the first column and the second column. Both ends of the pressure block 310 along the extension direction of the opening 130 are formed with a first inclined surface 510. The side wall of the second limiting plate 212 near the pressure block 310 is formed with a second inclined surface 520. The second inclined surface 520 is used to cooperate with the first inclined surface 510. The first inclined surface 510 of the pressure block 310 is used to press down the second inclined surface 520 to press the second limiting plate 212 against the inner wall of the opening.

[0040] Specifically, when a vehicle passes over the speed bump 140, the vehicle's weight will press the speed bump 140 down. After the speed bump 140 is pressed down, the pressure block 310 at the bottom of the speed bump 140 will push the second inclined surface 520 through the first inclined surface 510, thereby driving the second limiting plate 212 to move outward to fill the space previously reserved between the second limiting plate 212 and the inner wall of the opening for ease of installation. Thus, after the second limiting plate 212 moves outward under the push, it will press against the inner wall of the opening, thereby better ensuring the stable positioning of the entire device body 100 and the opening. That is, when the transport vehicle passes over the speed bump 140, the downward pressure of the speed bump 140 can achieve stable positioning of the device body 100, thereby better avoiding the displacement of the base plate 110 that may be caused by the vehicle running over it.

[0041] In this embodiment, both ends of the second limiting plate 212 are connected to the first sliding block 530. A first sliding groove 540 is formed on the inner wall of the first limiting block near the second limiting plate 212. The first sliding groove 540 and the first sliding block 530 slide together. A spring 550 is provided at the bottom wall of the sliding groove. The spring 550 is used to maintain the tendency of the first sliding block 530 to retract inward.

[0042] Furthermore, in this embodiment, the sliding of the second limiting plate 212 is achieved through the first sliding groove 540 at the first limiting plate 211. After the second limiting plate 212 is pressed outward and the vehicle passes through, the spring 550 can drive the second limiting plate 212 to reset, and the deceleration plate 140 can also be reset upward under the action of the elastic column 150, thereby maintaining the distance between the second limiting plate 212 and the inner wall of the opening, so as to facilitate the subsequent hoisting and removal of the device body 100.

[0043] In this embodiment, the second limiting plate 212 includes a first plate 610 and a second plate 620 separated from each other. The first plate 610 and the second plate 620 are respectively used to correspond one-to-one with the two deceleration plates 140 and the through 130. The bottom plate 110 is located between the first plate 610 and the second plate 620 and a mounting block 630 is provided. A second sliding groove 640 is formed on the side wall of the mounting block 630. A second sliding block 650 is formed on the side wall of the first plate 610 and the second plate 620 near the mounting block 630 and slides with the second sliding groove 640.

[0044] Specifically, in this embodiment, there are two speed reduction plates 140. Therefore, correspondingly, the second limiting plate 212 in this embodiment also has a first plate 610 and a second plate 620. When a vehicle passes through one of the speed reduction plates 140, the corresponding first plate 610 (second plate 620) is pressed down and pushed outward by the protrusion to achieve tight positioning. In this way, the movement and reset process of the entire first plate 610 (second plate 620) can be more stable, and the pressing down of the protrusion and the reset of the spring 550 can be more stable.

[0045] In this embodiment, both the first sliding block 530 and the second sliding block 650 are T-shaped.

[0046] In this embodiment, the base plate 110 is made of 2.5cm thick steel plate, and the lifting ring 120 is made of 16mm diameter round steel semi-circular ring.

[0047] It is readily understood that those skilled in the art can combine, separate, and reorganize the embodiments provided in this application to obtain other embodiments, all of which do not exceed the protection scope of this application. The invention and its embodiments have been described above illustratively, and this description is not restrictive. The embodiments shown are only part of the embodiments of the invention, and the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, they should all fall within the protection scope of this invention.

Claims

1. A protective device for box girder holes in a beam transport passage, characterized in that, The device includes a device body (100), which includes a base plate (110). The lower end face of the base plate (110) is provided with a ring-shaped limiting plate portion (210). The limiting plate portion (210) is used to be placed in the opening to limit the base plate (110). The limiting plate portion (210) includes a first limiting plate (211) symmetrically arranged, and a second limiting plate (212) symmetrically arranged between the first limiting plates (211). The first limiting plate (211) and the second limiting plate (212) are orthogonal, and the two ends of the second limiting plate (212) are in sliding fit with the first limiting plate (211). A through-hole (130) is formed on the upper end face of the base plate (110), and the extension direction of the through-hole (130) is consistent with the first limiting plate (211); a speed reduction plate (140) with an arc-shaped upper surface is provided at the through-hole (130), and an anti-slip groove (141) is formed on the upper end face of the speed reduction plate (140); the speed reduction plate (140) is installed on the upper end face of the base plate (110) by multiple elastic columns (150), and the multiple elastic columns (150) are used to vertically support the speed reduction plate (140) on the upper side of the through-hole (130); Multiple elastic columns (150) form a first column column and a second column column, which are symmetrically arranged on both sides of the opening (130); The elastic columns (150) in the first column and the second column are arranged in a linear array along the extension direction of the first limiting plate (211) at the lower end face of the deceleration plate (140). The lower end face of the deceleration plate (140) protrudes to form a pressure block (310) at the position between the first column and the second column. Both ends of the pressure block (310) along the extension direction of the opening (130) are formed with a first inclined surface (510). The side wall of the second limiting plate (212) near the pressure block (310) is formed with a second inclined surface (520). The second inclined surface (520) is used to cooperate with the first inclined surface (510). The first inclined surface (510) of the pressure block (310) is used to press down the second inclined surface (520) to press the second limiting plate (212) against the inner wall of the opening. Both ends of the second limiting plate (212) are connected to the first sliding block (530). The inner wall of the first limiting plate (211) near the second limiting plate (212) has a first sliding groove (540). The first sliding groove (540) and the first sliding block (530) slide together. A spring (550) is provided at the bottom wall of the sliding groove. The spring (550) is used to maintain the tendency of the first sliding block (530) to retract inward.

2. The protective device for box girder holes at a beam transport passage according to claim 1, characterized in that: The upper surface of the base plate (110) is provided with lifting rings (120) around the perimeter. The lifting rings (120) are used to connect and cooperate with the wire rope buckle of the crane to lift the device body (100) to the opening.

3. The protective device for box girder holes at a beam transport passage according to claim 1, characterized in that: There are two openings (130) and speed reducers (140). The second limiting plate (212) includes a first plate (610) and a second plate (620) separated from each other. The first plate (610) and the second plate (620) are respectively used to correspond one-to-one with the two speed reducers (140) and the opening (130). The base plate (110) is provided with a mounting block (630) located between the first plate (610) and the second plate (620), and a second sliding groove (640) is formed on the side wall of the mounting block (630); a second sliding block (650) is formed on the side wall of the first plate (610) and the second plate (620) near the mounting block (630) to slide in cooperation with the second sliding groove (640).

4. The protective device for box girder holes at a beam transport passage according to claim 3, characterized in that: The first sliding block (530) and the second sliding block (650) are both T-shaped; the upper end of the first limiting plate (211) is welded to the base plate (110) through the extension plate (710).

5. A protective device for box girder holes in a beam transport channel according to any one of claims 1-4, characterized in that: The base plate (110) is made of 2.5cm thick steel plate, and the lifting ring (120) is made of 16mm diameter round steel semi-circular ring.

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