CN109356024B

CN109356024B - Expansion device of highway bridge

Info

Publication number: CN109356024B
Application number: CN201811418835.3A
Authority: CN
Inventors: 李书芳
Original assignee: Chongqing Vocational Institute of Engineering
Current assignee: Chongqing Vocational Institute of Engineering
Priority date: 2018-11-26
Filing date: 2018-11-26
Publication date: 2020-06-16
Anticipated expiration: 2038-11-26
Also published as: CN109356024A

Abstract

The invention relates to the technical field of highway bridges and discloses a telescopic device of a highway bridge, which comprises a telescopic mechanism and two vertically arranged fixed plates, wherein the telescopic mechanism is positioned between the two fixed plates, a plurality of metal sheets are arranged at intervals on the outer sides of the fixed plates, and the metal sheets are obliquely and upwards arranged; the telescopic mechanism comprises a plurality of rubber belts and a plurality of vertical rods, the rubber belts are perpendicular to the fixed plates, the rubber belts are arranged in parallel at intervals, the rubber belts are connected through the vertical rods, the upper ends of the two fixed plates are horizontally hinged with extension plates, the extension plates are overlapped and slidably connected with each other, the lower ends of the two fixed plates are horizontally and fixedly connected with supporting plates, and a gap is formed between the two supporting plates; the vertical rod is divided into a plurality of supporting rods which are detachably connected. The rubber belt protector protects the rubber belt and facilitates the replacement of the rubber belt.

Description

Expansion device of highway bridge

Technical Field

The invention relates to the technical field of highway bridges, in particular to a telescopic device of a highway bridge.

Background

With the rapid development of economic construction in China, high-grade roads represented by expressways appear like spring shoots after raining, the traffic volume of the roads is increased rapidly, the running speed of vehicles running on the roads and the axle weight of the vehicles are increased, and the requirements of people on the running comfort and the like are higher and higher, so that the problems of the expansion device which is not enough in importance in the previous bridge design and construction become more and more prominent, and the bridge design, construction, maintenance and management departments are forced to pay full attention to the expansion device. The highway bridge expansion device is mainly installed at an expansion joint between two parts of a bridge body, directly bears the repeated impact action of wheel load in a bridge structure, is exposed in the atmosphere for a long time, has a severe use environment, and is a part which is most easily damaged and is difficult to repair the bridge structure.

Most of the existing highway bridge expansion devices are modular highway bridge expansion devices, and the structure of the existing highway bridge expansion devices is composed of two special-shaped steels and a rubber belt, wherein the rubber belt is positioned between the two special-shaped steels. The telescopic device has the following problems: 1. the rubber belt of the device is exposed outside and is rolled by a vehicle and soaked by rainwater, so that the aging degree of the rubber belt is accelerated. 2. The rubber belt is easy to clamp due to different deformation of different parts of the rubber belt, and the rubber belt is inconvenient to replace.

Disclosure of Invention

The invention aims to provide a telescopic device for a highway bridge, which protects a rubber belt and is convenient for replacing the rubber belt.

In order to achieve the purpose, the invention adopts the following technical scheme: a telescopic device of a highway bridge comprises a telescopic mechanism and two vertically arranged fixed plates, wherein the telescopic mechanism is positioned between the two fixed plates, a plurality of metal sheets are arranged at intervals on the outer sides of the fixed plates, and the metal sheets are obliquely and upwards arranged; the telescopic mechanism comprises a plurality of rubber belts and a plurality of vertical rods, the rubber belts are perpendicular to the fixed plates, the rubber belts are arranged in parallel at intervals, the rubber belts are connected through the vertical rods, two ends of each rubber belt are rotatably connected with rollers, the rollers are in sliding connection with one side of the fixed plates, the upper ends of the two fixed plates are horizontally hinged with extension plates, the extension plates are overlapped and in sliding connection with each other, the lower ends of the two fixed plates are horizontally and fixedly connected with supporting plates, and gaps are formed between the two supporting plates; the vertical rod is divided into a plurality of supporting rods which are detachably connected with each other.

Has the advantages that:

1. according to the rubber belt, the fixed plates and the extending plates are arranged, the rubber belt is placed between the two fixed plates, the two extending plates are overlapped with each other, the rubber belt is protected, the rubber belt is prevented from being directly rolled by a vehicle and soaked by rainwater, and the service life of the rubber belt is prolonged. Simultaneously, sliding connection between two extension boards is equipped with the clearance between two backup pads, for the rubber tape provides flexible space, can not influence the flexible function of rubber tape.

2. According to the rubber belt fixing device, the metal sheet is arranged on the outer side of the fixing plate, the pulleys are arranged at two ends of the rubber belt, and due to the fact that deformation quantities of different parts of the rubber belt are different, the rubber belt can be pulled out by grabbing the vertical rod, and friction between the rubber belt and the fixing plate is reduced due to the arrangement of the pulleys. Simultaneously, the sheetmetal upwards sets up for the slope, and when telescopic machanism did not all break away from the fixed plate, the fixed plate can smooth downstream, but can not outwards pull out it, takes the fixed plate out when avoiding changing the rubber tape, can guarantee like this when changing the rubber tape, can not influence the flexible performance of whole highway bridge.

3. According to the rubber belt replacing device, the rubber belt is divided into the plurality of rubber belts, the rubber belts are connected through the vertical rods, the vertical rods are divided into the plurality of support rods which are detachably connected, the rubber belt can only be partially pulled out due to different deformation quantities of different parts of the rubber belt, the support rods connected with the rubber belt can be detached and replaced, the rubber belt is prevented from being clamped, and the rubber belt is convenient to replace.

Furthermore, the upper ends between two adjacent vertical rods are connected through the elastic strip, so that people can hold the elastic strip to pull out the rubber belt, and the operation is more convenient.

Further, be provided with first lug in the backup pad, the lower extreme of vertical pole seted up with first lug complex first recess, be convenient for fix a position vertical pole for the rubber tape between the vertical pole is flexible to be out of shape, and the deformation of rubber tape is more stable.

Further, the quantity of vertical pole is two, and the distance between two vertical poles is greater than the distance between vertical pole and the homonymy gyro wheel, increases the deformation space between the rubber tape to play the effect of direction and support through vertical pole, make the flexible deformation of rubber tape more stable.

Further, the tip of extension board is equipped with sealed piece, and the vertical setting of sealed piece avoids the rainwater or the dust in the outside to get into the gap between two extension boards for sliding connection between two extension boards is more smooth and easy, avoids both to block.

Drawings

FIG. 1 is a front view of an embodiment of a telescopic device for road bridges according to the present invention;

fig. 2 is a front view of the slider of fig. 1.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the rubber belt structure comprises a first fixing plate 1, a second fixing plate 2, a metal sheet 3, a rubber belt 4, a vertical rod 5, an elastic strip 6, a roller 7, a first sliding groove 8, a second sliding groove 9, a first extending plate 10, a second extending plate 11, a sliding block 12, a third sliding groove 13, a sealing block 14, a supporting plate 15, a first protruding block 16, a first groove 17 and a deformation layer 18.

Examples are shown in fig. 1 and 2: the utility model provides a public road bridge roof beam's telescoping device, includes telescopic machanism, first fixed plate 1 and second fixed plate 2, the equal vertical setting of first fixed plate 1 and second fixed plate 2, and telescopic machanism is located between first fixed plate 1 and the second fixed plate 2, and first fixed plate 1 and second fixed plate 2 all adopt steel to make, and the equal interval in the outside of first fixed plate 1 and second fixed plate 2 is provided with a plurality of

sheetmetals

3, and 3 slopes of sheetmetal upwards set up.

The telescopic mechanism comprises a plurality of rubber belts 4 and two vertical rods 5, the rubber belts 4 are perpendicular to each other with a first fixing plate 1, the rubber belts 4 are arranged in parallel at intervals, the rubber belts 4 are connected through the vertical rods 5, the upper ends of the two vertical rods 5 are connected through elastic strips 6, the vertical rods 5 are divided into a plurality of supporting rods, the supporting rods are connected through threads, and the threaded connection parts of the two adjacent supporting rods are located between the two adjacent rubber belts 4. The both ends of every rubber tape 4 are rotated and are connected with gyro wheel 7, and the distance between two vertical rods 5 is greater than the distance between vertical rod 5 and the homonymy gyro wheel 7, and first spout 8 has been seted up to one side that first fixed plate 1 is close to rubber tape 4, and second spout 9 has been seted up to one side that second fixed plate 2 is close to rubber tape 4, and gyro wheel 7 slides from top to bottom along first spout 8 and second spout 9, and the upper end of first spout 8 and second spout 9 is opened. The upper end of the first fixing plate 1 is horizontally hinged with a first extending plate 10, the upper end of the second fixing plate 2 is horizontally hinged with a second extending plate 11, the first extending plate 10 is located above the second extending plate 11, the upper end face of the elastic strip 6 is abutted to the lower end face of the second extending plate 11, and the first extending plate 10 and the second extending plate 11 are partially overlapped. The lower terminal surface welding of first extension board 10 has slider 12, and the outside of slider 12 is provided with deformation layer 18, and deformation layer 18 adopts rubber materials to make, and third spout 13 has been seted up to the up end of second extension board 11, through setting up deformation layer 18, is convenient for artificially pull out slider 12 from third spout 13. The right end of the first extension plate 10 is bonded with a sealing block 14, the sealing block 14 is made of rubber materials, the sealing block 14 is vertically arranged, and the lower end of the sealing block 14 is abutted to the upper end face of the second extension plate 11. The equal horizontal welding of the lower extreme of first fixed plate 1 and second fixed plate 2 has backup pad 15, is equipped with the clearance between two backup pads 15, and the welding has first lug 16 in the backup pad 15, and first recess 17 has been seted up to the lower extreme of vertical pole 5, and first recess 17 cooperatees with first lug 16.

The specific implementation process is as follows: the lower end of a vertical rod 5 with a plurality of rubber belts 4 is inserted into a first groove 17, and a first fixing plate 1, a second fixing plate 2 and a telescopic mechanism are installed. Then, the first extension plate 10 is buckled above the second extension plate 11, the sealing block 14 abuts against the upper end face of the second extension plate 11, the sliding block 12 slides along the third sliding groove 13, and the first extension plate 10 and the second extension plate 11 are basically flush with the road surface of the highway bridge. Then with first fixed plate 1 and second fixed plate 2 along the gap downstream of public road bridge roof beam, the sheetmetal 3 of first fixed plate 1 and the 2 outsides of second fixed plate extrudes to the telescopic machanism direction and warp, whole telescoping device and public road bridge roof beam's gap interference fit. Vehicle above the public road bridge roof beam rolls first extension board 10 and second extension board 11, and elasticity strip 6 plays certain support and cushioning effect to both, and simultaneously, first extension board 10, second extension board 11, first fixed plate 1 and second fixed plate 2 form a protective layer each other, play the effect of protection to rubber band 4, have prolonged the life of rubber band 4. With the change of weather, because the temperature is different between the upper and the lower of the highway bridge and the stress condition of each layer of the highway bridge is different, the deformation condition of the rubber belt 4 is different, and the rubber belt 4 of each layer can deform to different degrees.

When the rubber belt 4 with part of aging needs to be replaced, the first extension plate 10 and the second extension plate 11 are opened, the elastic strip 6 is manually held to pull the whole telescopic mechanism outwards, two sides of the rubber belt 4 move upwards along the first sliding groove 8 and the second sliding groove 9, part of the rubber belt 4 is pulled out to be separated from the first fixing plate 1 and the second fixing plate 2, and at the moment, the first fixing plate 1 and the second fixing plate 2 are fixed under the action of the metal sheet 3 and the rubber belt 4 inside the metal sheet 3. Afterwards, rotate the rubber tape 4 that breaks away from out for two adjacent branch separation, thereby dismantle ageing rubber tape 4, through this kind of mode, can change ageing rubber tape 4 far away in position, improved the flexibility of changing rubber tape 4.

Claims

1. The telescopic device of the highway bridge is characterized by comprising a telescopic mechanism and two vertically arranged fixed plates, wherein the telescopic mechanism is positioned between the two fixed plates, a plurality of metal sheets are arranged at intervals on the outer sides of the fixed plates, and the metal sheets are obliquely and upwards arranged; the telescopic mechanism comprises a plurality of rubber belts and a plurality of vertical rods, the rubber belts are perpendicular to the fixed plates, the rubber belts are arranged in parallel at intervals, the rubber belts are connected through the vertical rods, two ends of each rubber belt are rotatably connected with rollers, the rollers are in sliding connection with one side of the fixed plates, the upper ends of the two fixed plates are horizontally hinged with extension plates, the extension plates are overlapped and in sliding connection with each other, the lower ends of the two fixed plates are horizontally and fixedly connected with supporting plates, and gaps are formed between the two supporting plates; the vertical rod is divided into a plurality of supporting rods which are detachably connected with each other; a first protruding block is arranged on the supporting plate, and a first groove matched with the first protruding block is formed in the lower end of the vertical rod.

2. A telescopic device for road bridges according to claim 1, characterised in that: the upper ends between two adjacent vertical rods are connected through an elastic strip.

3. A telescopic device for road bridges according to claim 2, characterised in that: the quantity of vertical pole is two, and the distance between two vertical poles is greater than the distance between vertical pole and the homonymy gyro wheel.

4. A telescopic device for road bridges according to claim 3, characterised in that: the tip of extension board is equipped with sealed piece, and sealed piece is vertical to be set up.