Temporary manhole cover plate applied to steel box bridge welding

Abstract

The utility model provides a manhole temporary cover plate applied to steel box bridge welding, which comprises a protective part and a grating protective part, the protective part and the grating protective part are overlapped to form a protective unit, the protective part comprises a panel and a hinge rod arranged on one side of the panel, and the grating protective part comprises a grating net and a connecting rod arranged on the grating net; the number of the rotating seats is two, the rotating seats comprise the first rotating seat and the second rotating seat, the first rotating seat and the second rotating seat are oppositely arranged, and the first rotating seat comprises a connecting seat and a rotating shaft; the connecting rod and the hinge rod are hinged to the portions, located on the two sides of the connecting base, of the rotating shaft respectively, and the first rotating base is provided with a limiting piece used for limiting rotation of the protection piece. According to the grid protection piece, the protection piece and the limiting piece are matched with each other to meet the requirements of ventilation and daily shielding in the welding process, and the diversified shielding requirements of a manhole for welding a steel box bridge are met.

Description

Technical Field

[0001] This utility model belongs to the field of manholes for steel box girder bridges, and particularly relates to a temporary manhole cover plate used in the welding of steel box girder bridges. Background Technology

[0002] Steel box girder bridges are usually part of the bridge structure. During construction, manholes are provided on the steel box girder bridges to allow workers to enter the interior for welding operations. During the welding process, the manholes of the steel box girder bridges are usually not completely sealed and need to be kept ventilated.

[0003] Most manhole cover structures adopt an integral structure. When the cover is closed, it will isolate the interior of the steel box girder bridge from the outside world. After the manhole is closed, the working environment of the operators deteriorates. However, keeping it open during welding will pose a safety hazard to people passing by. It is also necessary to shield it to reduce safety hazards. Existing technical structures cannot meet the diversified shielding needs of manholes during construction. Utility Model Content

[0004] This utility model provides a temporary manhole cover for welding steel box girder bridges, aiming to solve the problem that the current manhole cover structure cannot meet the diverse shielding needs of manholes during construction.

[0005] This utility model is implemented as follows: a temporary manhole cover plate for welding steel box girder bridges, comprising:

[0006] Protective components and grid protective components are stacked to form a protective unit. The protective component includes a panel and a hinge rod disposed on one side of the panel. The grid protective component includes a grid mesh and connecting rods disposed on the grid mesh.

[0007] The rotating seat consists of two sets, namely a first rotating seat and a second rotating seat, which are arranged opposite to each other. The first rotating seat includes a connecting seat fixedly connected to the steel box bridge and a rotating shaft passing through the connecting seat. The connecting rod and the hinge rod are respectively hinged to the rotating shaft on both sides of the connecting seat. The first rotating seat and the second rotating seat have the same structure.

[0008] A limiting member is provided on a first rotating seat. The limiting member includes an outer fixed seat and a sliding rod that slides on the outer fixed seat. The sliding rod extends out of the outer fixed seat to block the rotation of the hinge rod.

[0009] Preferably, the limiting member further includes a content receiving groove and a lock disposed inside the first rotating seat. The content receiving groove communicates with a sliding hole provided on the outer fixed seat. The sliding rod slides in the sliding groove formed by the content receiving groove and the sliding hole. The lock is disposed inside the outer fixed seat, and the lock tongue extends into the sliding hole.

[0010] Preferably, the sliding rod portion extends into a sliding groove, and the portion of the sliding rod extending into the sliding groove prevents the hinge rod from rotating.

[0011] Preferably, the outer fixing seat is further provided with a locking tongue groove, which is connected to the sliding hole. The locking tongue of the lock is located in the locking tongue groove, and when the locking tongue rotates, it extends from the locking tongue groove into the sliding hole.

[0012] Preferably, the sliding rod is provided with two sets of limiting units, which are respectively arranged at both ends of the sliding rod. The limiting unit includes a limiting ring and a locking groove. When the locking tongue rotates, it extends from the locking tongue groove into the sliding hole and engages with the locking groove.

[0013] Preferably, the inner diameter of the content receiving groove is greater than the outer diameter of the limiting ring, and the inner diameter of the sliding hole is smaller than the outer diameter of the limiting ring.

[0014] Preferably, the end face of the panel that contacts the grille guard is provided with a groove for accommodating the connecting rod.

[0015] Compared with the prior art, the embodiments of this application have the following main advantages:

[0016] The temporary manhole cover plate for steel box girder bridge welding provided by this utility model is designed by separating the grid protective component and the rotating component of the protective component. The limiting component independently limits the protective component. With the independent limiting function of the limiting component, the grid protective component, the protective component and the limiting component work together to meet the ventilation and daily shielding needs during the welding process, thus meeting the diversified shielding needs of the manhole for steel box girder bridge welding. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of a temporary manhole cover plate for welding steel box girder bridges provided by this utility model.

[0018] Figure 2 This is a top view of the structure of a temporary manhole cover plate for welding steel box girder bridges provided by this utility model.

[0019] Figure 3 This utility model provides a schematic diagram of the protective component and the grid protective component for a temporary manhole cover plate used in the welding of steel box girder bridges.

[0020] Figure 4 This is a schematic diagram of the structure of a limiting component in a temporary manhole cover plate for welding steel box girder bridges, provided by this utility model.

[0021] Figure 5 This is a schematic diagram of the internal structure of a limiting component for a temporary manhole cover plate used in the welding of steel box girder bridges, provided by this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10. Steel box girder bridge; 110. Manhole;

[0024] 210. Protective component; 211. Panel; 212. Hinge rod; 220. Grille protective component; 221. Grille mesh; 222. Connecting rod;

[0025] 300, Rotating seat; 301, First rotating seat; 302, Second rotating seat; 310, Connecting seat; 311, Sliding hole; 312, Content receiving groove; 313, Lock tongue groove; 314, External fixing seat; 320, Rotating shaft; 330, Sliding rod; 331, Limiting ring; 332, Locking groove; 340, Lock. Detailed Implementation

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] This utility model embodiment provides a temporary manhole cover plate for welding steel box girder bridges, applied to the outside of the manhole 110 of the steel box girder bridge 10, such as... Figures 1-5 As shown, the temporary manhole cover plate used for welding steel box girder bridges includes:

[0029] The protective component 210 and the grille protective component 220 are stacked to form a protective unit. The protective component 210 includes a panel 211 and a hinge rod 212 disposed on one side of the panel 211. The grille protective component 220 includes a grille mesh 221 and connecting rods 222 disposed on the grille mesh 221. The panel 211 adopts an integral structure and mainly undertakes the function of complete sealing, while the grille mesh 221 constitutes an air vent communicating with the outside air.

[0030] The rotating seat 300 consists of two sets, namely a first rotating seat 301 and a second rotating seat 302. The first rotating seat 301 and the second rotating seat 302 are arranged opposite to each other. The protective member 210 and the grid protective member 220 are simultaneously hinged to the first rotating seat 301 and the second rotating seat 302. Therefore, both the protective member 210 and the grid protective member 220 can rotate around the first rotating seat 301 and the second rotating seat 302. The first rotating seat 301 and the second rotating seat 302 have the same structure.

[0031] The first rotating seat 301 includes a connecting seat 310 fixedly connected to the steel box bridge 10 and a rotating shaft 320 passing through the connecting seat 310; the connecting rod 222 and the hinge rod 212 are respectively hinged to the portions of the rotating shaft 320 located on both sides of the connecting seat 310; both ends of the rotating shaft 320 extend out of the connecting seat 310, and the connecting rod 222 and the hinge rod 212 are respectively hinged to both sides of the connecting seat 310; the purpose here is to set a limiting member to restrict the rotation of the protective member 210. The limiting member is set on the first rotating seat 301, and the limiting member and the hinge rod 212 are located on the same side of the connecting seat 310. In this way, the limiting member can only interfere with the rotation of the hinge rod 212, and the connecting rod 222 can still rotate because its rotation area is not located on the same side as the hinge rod 212;

[0032] The limiting component includes an outer fixing base 314, a sliding rod 330 sliding on the outer fixing base 314, an inner receiving groove 312 disposed inside the first rotating seat 301, and a lock 340; the sliding rod 330 slides through a sliding hole 311 with a different diameter structure.

[0033] The content receiving groove 312 is connected to the sliding hole 311 provided on the outer fixing base 314. The sliding rod 330 slides in the sliding groove formed by the content receiving groove 312 and the sliding hole 311. A portion of the sliding rod 330 extends out of the sliding groove, and the portion of the sliding rod 330 extending out of the sliding groove blocks the rotation of the hinge rod 212.

[0034] The lock 340 is disposed inside the outer fixing seat 314. The lock tongue of the lock 340 can extend into the sliding hole 311 through the lock tongue groove 313 provided inside the outer fixing seat 314. The lock tongue can restrict the sliding rod 330 from sliding in the sliding groove. For example, when it is necessary to restrict the sliding rod 330 from sliding, the lock tongue can lock the sliding rod 330, so that the sliding rod 330 can block the hinge rod 212 from rotating.

[0035] In practical applications, the grille protective component 220 is deflected and covers the manhole 110, while the protective component 210 is on the side away from the manhole 110. The sliding rod 330 blocks the rotation path of the hinge rod 212. At this time, the grille protective component 220 provides temporary support to prevent personnel from falling into the manhole and ensures airflow during welding inside the manhole. This prevents the structure of the protective component 210 from affecting airflow. Since the grille protective component 220 can be opened at this time without hindrance, operators can freely enter and exit. After welding is completed, the protective component 210 is also placed over the grille protective component 220, and the limiting component is locked again. Because the protective component 210 cannot return to the side away from the manhole 110, the grille protective component 220 cannot be opened. This prevents unauthorized personnel from accidentally entering the manhole 110 or opening the protective components 210 and 220, which could lead to accidental falls. When the protective components 210 and 220 are closed, it reduces the entry of external debris into the steel box girder bridge structure.

[0036] As a preferred embodiment of this embodiment, the sliding rod 330 is provided with two sets of limiting units, which are respectively arranged at both ends of the sliding rod 330. The limiting unit includes a limiting ring 331 and a locking groove 332. When the locking tongue rotates, it extends from the locking tongue groove 313 into the sliding hole 311 and engages in the locking groove 332.

[0037] In this embodiment, the inner diameter of the content receiving groove 312 is larger than the outer diameter of the limiting ring 331, and the inner diameter of the sliding hole 311 is smaller than the outer diameter of the limiting ring 331. When one end of the sliding rod 330 is inserted into the content receiving groove 312 and contacts the end of the content receiving groove 312, the sliding rod 330 will release the interference to the rotation path of the hinge rod 212. When the sliding rod 330 is pulled outward, the sliding rod 330 will interfere with the rotation path of the hinge rod 212.

[0038] The distance between the two sets of limiting rings 331 is greater than the depth of the sliding hole 311, which satisfies the back-and-forth movement limit and helps the locking groove 332 reach the lock tongue groove 313, so that the locking of the lock 340 can accurately enter the locking groove 332. The lock 340 adopts the existing lock structure.

[0039] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0040] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A temporary manhole cover for welding steel box girder bridges, applied to the outside of the manhole (110) of a steel box girder bridge (10), characterized in that, include: The protective component (210) and the grid protective component (220) are stacked to form a protective unit. The protective component (210) includes a panel (211) and a hinge rod (212) disposed on one side of the panel (211). The grid protective component (220) includes a grid mesh (221) and a connecting rod (222) disposed on the grid mesh (221). The rotating seat (300) consists of two sets: a first rotating seat (301) and a second rotating seat (302). The first rotating seat (301) and the second rotating seat (302) are arranged opposite to each other. The first rotating seat (301) includes a connecting seat (310) fixedly connected to the steel box bridge (10) and a rotating shaft (320) passing through the connecting seat (310). The connecting rod (222) and the hinge rod (212) are respectively hinged to the portion of the rotating shaft (320) located on both sides of the connecting seat (310). The first rotating seat (301) and the second rotating seat (302) have the same structure. A limiting member is provided on the first rotating seat (301). The limiting member includes an outer fixed seat (314) and a sliding rod (330) that slides on the outer fixed seat (314). The sliding rod (330) extends out of the outer fixed seat (314) to block the rotation of the hinge rod (212).

2. A temporary manhole cover for welding steel box girder bridges as described in claim 1, characterized in that, The limiting member also includes a content receiving groove (312) and a lock (340) disposed inside the first rotating seat (301). The content receiving groove (312) communicates with a sliding hole (311) provided on the outer fixed seat (314). The sliding rod (330) slides in the sliding groove formed by the content receiving groove (312) and the sliding hole (311). The lock (340) is disposed inside the outer fixed seat (314), and the locking tongue of the lock (340) extends into the sliding hole (311).

3. A temporary manhole cover for welding steel box girder bridges as described in claim 2, characterized in that, The sliding rod (330) extends into a sliding groove, and the portion of the sliding rod (330) extending into the sliding groove blocks the rotation of the hinge rod (212).

4. A temporary manhole cover for welding steel box girder bridges as described in claim 3, characterized in that, The outer fixing seat (314) is also provided with a locking tongue groove (313), which is connected to the sliding hole (311). The locking tongue of the lock (340) is located in the locking tongue groove (313), and when the locking tongue rotates, it extends from the locking tongue groove (313) into the sliding hole (311).

5. A temporary manhole cover for welding steel box girder bridges as described in claim 4, characterized in that, The sliding rod (330) is provided with two sets of limiting units, which are respectively arranged at both ends of the sliding rod (330). The limiting unit includes a limiting ring (331) and a locking groove (332). When the locking tongue rotates, it extends from the locking tongue groove (313) into the sliding hole (311) and engages in the locking groove (332).

6. A temporary manhole cover for welding steel box girder bridges as described in claim 5, characterized in that, The inner diameter of the content slot (312) is larger than the outer diameter of the limiting ring (331), and the inner diameter of the sliding hole (311) is smaller than the outer diameter of the limiting ring (331).

7. A temporary manhole cover for welding steel box girder bridges as described in claim 1, characterized in that, The end face of the panel (211) that is in contact with the grille guard (220) is provided with a groove for accommodating the connecting rod (222).

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