CN214832019U

CN214832019U - Watertight access door structure of steel box arch bridge

Info

Publication number: CN214832019U
Application number: CN202120763789.1U
Authority: CN
Inventors: 刘昌文; 王超; 刘定凤; 王艳; 李昕蕊
Original assignee: China 19th Metallurgical Corp
Current assignee: China 19th Metallurgical Corp
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-11-23
Anticipated expiration: 2031-04-14

Abstract

The utility model belongs to the technical field of the bridge construction and specifically relates to a when guaranteeing the switching convenience, can also guarantee the steel box arched bridge watertight access door structure of the leakproofness of leakproofness, including setting up in the manhole of steel box roof beam bottom, along the fixed manhole stiffening ring that sets up of manhole and with the airtight complex manhole apron of manhole stiffening ring, rotatable coupling between the apron connecting piece that manhole apron and fixed set up on the steel box roof beam, the manhole apron through set up the apron sealing mechanism on the steel box roof beam and with the airtight cooperation of manhole stiffening ring, manhole apron orientation stiffening ring one side be provided with on the surface with the mutual assorted sealing ring structure of manhole stiffening ring edge, sealing ring constructs and the manhole stiffening ring edge is hugged closely sealedly. The utility model discloses a let manhole cover plate towards manhole stiffening ring one side be provided with on the surface with the mutual assorted sealing ring structure of manhole stiffening ring edge, guaranteed sealed performance requirement. The utility model discloses be particularly useful for among the steel case bridge structure of bridge.

Description

Watertight access door structure of steel box arch bridge

Technical Field

The utility model belongs to the technical field of bridge structures and specifically relates to a steel case arched bridge watertight access door structure.

Background

In the steel box bridge structure, in order to facilitate field installation personnel to carry out final operation inside the box and maintain and repair the steel box bridge in the later stage, a watertight door is usually arranged at the position of a web plate of the steel box bridge. At present, the access hole of the steel box girder is arranged at the bottom plate position of the steel box girder, and the access door is not easy to open due to the heavy weight and the gravity, the structure sealing performance is poor, and great potential safety hazards exist after the time is too long. Taking patent technology CN201920610114.6 as an example, it discloses a door type manhole dedicated to steel box bridges, which has the disadvantages that the sealing performance between the door plate structure and the main beam bottom plate is poor, and especially, the inside of the steel box beam can be rusted for a long time in a humid environment, which brings adverse effects to the related structures.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a steel case arched bridge watertight access door structure of leakproofness can also be guaranteed in the time of guaranteeing the switching convenience.

The utility model provides a technical scheme that its technical problem adopted is: steel case arched bridge watertight access door structure, including set up in the manhole of steel case roof beam bottom portion, along the fixed manhole stiffening ring that sets up of manhole and with the airtight complex manhole cover plate of manhole stiffening ring, wherein manhole cover plate and fixed rotatable coupling between the cover connection spare that sets up on the steel case roof beam, manhole cover plate through set up the apron sealing mechanism on the steel case roof beam and with the airtight cooperation of manhole stiffening ring, wherein, manhole cover plate is provided with on the surface towards manhole stiffening ring one side and is provided with the sealing ring structure of each other assorted with manhole stiffening ring edge, sealing ring structure hugs closely sealedly with manhole stiffening ring edge.

Further, the sealing ring structure comprises an outer reinforcing ring, an inner reinforcing ring and a sealing strip structure arranged between the outer reinforcing ring and the inner reinforcing ring.

Further, the cover plate sealing mechanism comprises a fixed base and a manhole cover plate locking mechanism, wherein the fixed base is arranged on the steel box girder, and the manhole cover plate is fixedly arranged on the fixed base by the manhole cover plate locking mechanism.

Further, the manhole cover plate fixing device comprises a fixing screw fastener, wherein a fixing screw is arranged on the fixing base, a cover plate connecting plate is arranged at the end of the manhole cover plate, the fixing screw is arranged in a through hole in the cover plate connecting plate, and the manhole cover plate is fixedly arranged on the fixing base through matching with the fixing screw fastener.

Further, the fixed screw fastener is a fastening hand wheel matched with the fixed screw.

Further, the fixed screw and the fixed base are connected through a screw connecting bolt.

Further, the fixed base comprises a bottom plate, a clamping plate and a stiffening plate.

Further, the bottom plate of the fixed base is arranged on the steel box girder.

Furthermore, the outer side wall surface of the manhole cover plate is provided with a handrail.

Further, the manhole cover plate connecting rod is arranged on the wall surface of the manhole cover plate, and the manhole cover plate is rotatably connected with the cover plate connecting piece through the cover plate connecting rod.

The utility model has the advantages that: when in actual use, when the manhole cover plate needs to be opened so as to facilitate an operator to pass through the access hole and carry out maintenance and repair, the manhole cover plate can be opened under the action of gravity by simply opening the cover plate sealing mechanism. When the manhole cover plate needs to be closed, only the cover plate sealing mechanism is needed. Wherein, when the manhole cover plate is in the closed condition, because the utility model discloses a let manhole cover plate be provided with on the surface towards manhole stiffening ring one side with the sealed ring structure of manhole stiffening ring edge mutual assorted, sealed ring structure hugs closely sealedly with manhole stiffening ring edge promptly to sealed performance requirement has been guaranteed. The utility model discloses be particularly useful for among the steel case bridge structure of bridge.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a sectional view a-a of fig. 1.

Fig. 3 is a sectional view B-B of fig. 1.

Fig. 4 is the utility model discloses a manhole cover plate and the connection schematic diagram of the apron connecting piece on the steel case roof beam.

Fig. 5 is a schematic view of the fixing base of the present invention.

Fig. 6 is a schematic view of the fixing base of the present invention.

Fig. 7 is a schematic view of the fixing base of the present invention.

Labeled as: manhole stiffening ring 1, manhole cover plate 2, outer stiffening ring 3, inner stiffening ring 4, cover plate connecting rod 5, cover plate connecting piece 6, cover plate connecting piece connecting pin 7, handrail 8, cover plate connecting plate 9, unable adjustment base 10, bottom plate 101, stiffening plate 102, splint 103, fixing screw fastener 11, sealing ring structure 12, screw connecting bolt 13, fixing screw 14, manhole 15, steel box girder 16.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The watertight access door structure of the steel box arch bridge as shown in fig. 1 to 7 comprises an access hole 15 arranged at the bottom of a steel box beam 16, a manhole stiffening ring 1 fixedly arranged along the access hole 15 and a manhole cover plate 2 in airtight fit with the manhole stiffening ring 1, wherein the manhole cover plate 2 is rotatably connected with a cover plate connecting piece 6 fixedly arranged on the steel box beam 16, the manhole cover plate 2 is in airtight fit with the manhole stiffening ring 1 through a cover plate sealing mechanism arranged on the steel box beam 16, wherein a sealing ring structure 12 matched with the edge of the manhole stiffening ring 1 is arranged on the surface of one side, facing the manhole stiffening ring 1, of the manhole cover plate 2, and the sealing ring structure 12 is tightly attached to the edge of the manhole stiffening ring 1 and sealed.

The watertight access door is mainly used for overhauling the internal structure of the steel box girder and preventing external air, water and the like from entering the steel box girder. The existing watertight access door structure for the steel box arch bridge often faces the balance between the convenience of opening and closing and the sealing performance of closing due to the defects of structural design. The utility model discloses an in the structure, manhole stiffening ring 1 welds in manhole 15 department, and inside manhole stiffening ring 1's some stretched into the box of steel box girder 16, thereby some end is then hugged closely with sealing ring structure 12 and is realized sealedly, and this has just guaranteed that manhole cover plate 2 can obtain fine sealed effect when closing. Generally, it is preferred to include the apron connecting rod 5 that sets up on the manhole cover 2 wall, the manhole cover 2 through apron connecting rod 5 with lap 6 between rotatable coupling, the apron connecting rod 5 through lap 6 between rotatable coupling of connecting pin 7 and the apron connecting piece, thereby realize the firm and rotatable connection between manhole cover 2 and the apron connecting piece 6.

In order to obtain a stronger sealing effect, the following scheme is preferred: the sealing ring structure 12 comprises an outer reinforcing ring 3, an inner reinforcing ring 4 and a sealing strip structure arranged between the outer reinforcing ring 3 and the inner reinforcing ring 4. As shown in fig. 2, the sealing strip structure disposed between the outer reinforcing ring 3 and the inner reinforcing ring 4 can be tightly attached to the edge of the manhole stiffening ring 1 to form a strong sealing effect due to the strong restraint and support, so that the sealing performance is greatly improved.

In order to further simplify the corresponding structure on the premise of ensuring the convenience of opening and closing, the scheme is preferably as follows: the cover plate sealing mechanism comprises a fixed base 10 and a manhole cover plate locking mechanism, wherein the fixed base 10 and the manhole cover plate locking mechanism are arranged on the steel box girder 16, and the manhole cover plate 2 is fixedly arranged on the fixed base 10 by the manhole cover plate locking mechanism. Generally, the fixed base 10 mainly includes a bottom plate 101, a stiffener 102 and a clamping plate 103, the bottom plate 101 of the fixed base 10 is disposed on the steel box girder 16, and the clamping plate 103 fixes the manhole cover 2.

In order to further realize convenient opening and closing of the manhole cover plate 2, the following scheme is preferred: including clamping screw fastener 11, unable adjustment base 10 is provided with clamping

screw

14, and 2 ends of manhole apron are provided with apron connecting plate 9, wherein, clamping screw 14 sets up in the through-hole on apron connecting plate 9 and through with clamping screw fastener 11 cooperation and with manhole apron 2 fixed the setting on unable adjustment base 10. Generally, the screw fastener 11 is preferably a fastening hand wheel which is matched with the fixing screw 14, so that the operation is convenient. In addition, the fixing screw 14 and the fixing base 10 are preferably connected through the screw connecting bolt 13, so that convenience in aligning the fixing screw 14 with the through hole of the cover plate connecting plate 9 is improved, and the through hole can be conveniently and quickly found to realize fixing. In addition, in order to facilitate the operation, it is preferable that the outer side wall surface of the manhole cover 2 is provided with a handrail 8, thereby facilitating the operation when the manhole cover 2 is opened and closed.

In actual operation, the watertight access door structure of the steel box arch bridge is preferably arranged at the bottom web plate position of the steel box arch bridge structure. The access hole 15 is obtained by forming a round hole in the steel box arch bridge web, and the diameter range of the general hole diameter can be considered to be 500-600 mm. The structure can be optimized to be made of the same material as the original steel box arch bridge, so that the requirement of the structure is met, and the structure is firm, durable, superior in sealing performance, convenient to open and convenient to overhaul the steel box arch bridge structure.

Claims

1. Steel case arched bridge watertight access door structure, including setting up in manhole (15) of steel case roof beam (16) bottom, along manhole stiffening ring (1) of fixed setting of manhole (15) and with manhole stiffening ring (1) airtight complex manhole cover plate (2), wherein manhole cover plate (2) and fixed rotatable coupling between apron connecting piece (6) that set up on steel case roof beam (16), its characterized in that: manhole cover board (2) through set up the apron sealing mechanism on steel box girder (16) and with manhole stiffening ring (1) airtight fit, wherein, manhole cover board (2) are provided with on the surface towards manhole stiffening ring (1) one side with manhole stiffening ring (1) edge sealing ring structure (12) that matches each other, sealing ring structure (12) are hugged closely sealed with manhole stiffening ring (1) edge.

2. The watertight access door structure for a steel box arch bridge of claim 1, wherein: the sealing ring structure (12) comprises an outer reinforcing ring (3), an inner reinforcing ring (4) and a sealing strip structure arranged between the outer reinforcing ring (3) and the inner reinforcing ring (4).

3. The watertight access door structure for steel box arch bridges of claim 1 or 2, wherein: the cover plate sealing mechanism comprises a fixed base (10) and a manhole cover plate locking mechanism, wherein the fixed base (10) is arranged on the steel box girder (16), and the manhole cover plate locking mechanism is used for fixedly arranging the manhole cover plate (2) on the fixed base (10).

4. A watertight access door structure for a steel box arch bridge according to claim 3, wherein: including clamping screw fastener (11), unable adjustment base (10) are provided with clamping screw (14), and manhole apron (2) end is provided with apron connecting plate (9), wherein, clamping screw (14) set up in the through-hole on apron connecting plate (9) and through cooperating with clamping screw fastener (11) and set up manhole apron (2) fixedly on unable adjustment base (10).

5. The watertight access door structure for steel box arch bridges of claim 4, wherein: the fixed screw rod fastener (11) is a fastening hand wheel matched with the fixed screw rod (14).

6. The watertight access door structure for steel box arch bridges of claim 4, wherein: the fixed screw (14) is connected with the fixed base (10) through a screw connecting bolt (13).

7. A watertight access door structure for a steel box arch bridge according to claim 3, wherein: the fixed base (10) comprises a bottom plate (101), a clamping plate (103) and a stiffening plate (102).

8. The watertight access door structure for a steel box arch bridge of claim 7, wherein: and the bottom plate (101) of the fixed base (10) is arranged on the steel box girder (16).

9. The watertight access door structure for steel box arch bridges of claim 1 or 2, wherein: and the outer side wall surface of the manhole cover plate (2) is provided with a handrail (8).

10. The watertight access door structure for steel box arch bridges of claim 1 or 2, wherein: including setting up apron connecting rod (5) on manhole apron (2) wall, manhole apron (2) through apron connecting rod (5) and apron connecting piece (6) between rotatable coupling.