CN220908174U - Bridge continuous box girder longitudinal prestress beam tensioning platform - Google Patents

Abstract

The utility model relates to the field related to bridge construction, in particular to a longitudinal prestress beam tensioning platform for a continuous box girder of a bridge. The device comprises a platform height adjusting system, a front-back moving system, a left-right moving system and an up-down adjusting system, wherein the front-back moving system is arranged above the platform height adjusting system, the left-right moving system is arranged on the inner side of the front-back moving system, and the up-down adjusting system is arranged on the left-right moving system. Compared with the existing lifting jack with a bracket, the device has the advantages that the problem that the steel bars and templates of a continuous box girder are easy to collide in the process of lifting the lifting jack or the tower crane to install the lifting jack are easy to damage the lifting jack is avoided, and the problem that a large amount of working time is occupied in the process of installing the lifting jack or the tower crane to cause high cost of stretching process equipment is avoided. The device can adjust the height of the tensioning platform and the front-back, left-right, up-down and left-right positions of the jack according to the requirements of different prestress hole positions.

Description

Bridge continuous box girder longitudinal prestress beam tensioning platform

Technical Field

The utility model relates to the field related to bridge construction, in particular to a longitudinal prestress beam tensioning platform for a continuous box girder of a bridge.

Background

At present, the railway and highway construction of China is in a rapid development stage, the bridge is an important component part of the railway and highway construction, the railway and highway bridge relates to continuous box girder construction, the construction procedure is very common, the longitudinal prestress beam tensioning of the continuous box girder is one of the most important procedures in bridge construction, the common tensioning jack mounting process is to lift the tensioning jack by using an automobile crane or a tower crane, and penetrate into the tensioning jack after aligning steel strands, but the steel bars and templates of the continuous box girder are easily collided in the process of lifting the mounting jack due to the construction accuracy of the automobile crane or the tower crane, so that the tensioning jack is easily damaged; on the other hand, more than one prestress bundle is needed to be tensioned, and the continuous matching of the automobile crane or the tower crane is needed in the tensioning process, so that a great amount of working time of the automobile crane or the tower crane is occupied, and the tensioning process is high in cost.

Disclosure of utility model

The utility model aims to overcome the defects of the existing method for installing a tensioning jack on a continuous box girder, and provides a device for adjusting the position of the tensioning jack up and down, front and back and left and right in the process of preparing a prestress tensioning installation tensioning jack on the continuous box girder of a bridge. The device solves the problem that the automobile crane or the tower crane is easy to collide with the steel bars and the templates of the continuous box girder in the process of lifting and installing the jack, and the tensioning jack is easy to damage, and simultaneously solves the problem that the cost of tensioning process equipment is expensive because a large amount of working time of the automobile crane or the tower crane is occupied in the process of installing the tensioning jack. The device facilitates the installation of the tensioning jack, improves the construction efficiency, improves the construction quality and saves the construction cost.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

The utility model provides a bridge continuous box girder longitudinal prestress beam tensioning platform, includes platform height adjustment system, back-and-forth movement system, controls moving system, regulation system from top to bottom, platform height adjustment system's top is equipped with back-and-forth movement system, and the inboard of back-and-forth movement system is equipped with controls moving system, controls and is equipped with regulation system from top to bottom on the moving system.

Further, the platform height adjusting system comprises a left part system and a right part system, wherein the left part system and the right part system are symmetrically distributed, the left part system comprises a lifting adjusting pipe, a lifting fixing pipe, a ladder stand fixing frame, a ladder stand, a frame body cross rod, a front supporting leg and a front supporting leg diagonal brace, the lifting fixing pipe is sleeved on the outer side of the lifting adjusting pipe, the lifting adjusting pipe is connected with the lifting fixing pipe through a lifting fixing bolt, the upper part of the lifting fixing pipe is provided with the ladder stand fixing frame, one side of the ladder stand fixing frame is provided with the ladder stand, the upper end of the lifting adjusting pipe is provided with the frame body cross rod, the front part of the frame body cross rod is provided with the front supporting leg, and the lower part of the front supporting leg is provided with the front supporting leg diagonal brace which is connected with the front supporting leg through the front supporting leg diagonal brace fixing bolt.

Further, the lower part of cat ladder is connected with cat ladder mount, and the upper portion of cat ladder is connected with the support body horizontal pole.

Further, a protection plate is arranged between the left lifting adjusting pipe and the right lifting adjusting pipe.

Further, the lifting fixing pipe and the lifting adjusting pipe are respectively provided with a fixing pipe long slot hole and an adjusting pipe long slot hole, and the fixing pipe long slot hole is connected with the adjusting pipe long slot hole through a lifting fixing bolt.

Further, the front-back moving system comprises a first slideway, a second slideway, a third slideway, a cross bar chute, a front-back moving control rocker and a strip steel plate; the left side is equipped with first slide, second slide, third slide in proper order between the support body horizontal pole, first slide, third slide set up respectively in two the both ends of support body horizontal pole, two be equipped with two horizontal pole spouts on the support body horizontal pole, the both ends of second slide respectively with two horizontal pole spout sliding connection, run through on the third slide and be equipped with fore-and-aft movement control rocker, two the inboard of support body horizontal pole is equipped with two rectangular steel sheets respectively, and two rectangular steel sheets pass through spacing buckle and support body horizontal pole sliding connection, be equipped with the tooth's socket on the rectangular steel sheet, fore-and-aft movement control rocker runs through two rectangular steel sheets respectively and is connected with the tooth's socket meshing, the one end and the second slide of rectangular steel sheet are connected.

Further, a gear is arranged on the front-back movement control rocker, and the gear is in meshed connection with the tooth slot.

Further, the left-right movement system comprises a concave pulley, a left-right movement control rocker, a steel plate slideway, an auxiliary pulley, a sliding hollow pipe and a convex pulley, wherein an upper slot hole is formed in the upper end of the second slideway, the concave pulley is arranged in the upper slot hole, the left-right movement control rocker is arranged on the concave pulley, the steel plate slideway is arranged below the second slideway, two ends of the steel plate slideway are respectively in sliding connection with the first slideway and the third slideway through the auxiliary pulley, a hanging bracket is arranged below the concave pulley, a first steel wire rope is arranged between the hanging bracket and the concave pulley, a sliding hollow pipe is arranged on the first steel wire rope, the upper end of the sliding hollow pipe is connected with the steel plate slideway through the convex pulley, and a movable pulley is arranged at the lower end of the sliding hollow pipe and is connected with the hanging bracket through the second steel wire rope.

Further, a control rod chute is arranged on the third slideway, the left-right movement control rocker penetrates through the control rod chute and is connected with the concave pulley, a limit rod is arranged at the lower part of the second slideway, and a sliding hollow tube is arranged at the inner side of the limit rod.

Further, up-down adjusting system includes first wire rope, gallows, movable pulley, reciprocates control rocker, steering column, jack, second wire rope, concave pulley passes through first wire rope and is connected with the gallows, is equipped with the slip hollow tube on the first wire rope, and the lower extreme of slip hollow tube is equipped with the movable pulley, controls two be equipped with between the lift fixed tube and reciprocate control rocker, the below of first slide is equipped with the steering column, second wire rope and gallows, movable pulley, steering column, reciprocate control rocker and connect gradually, the below of gallows is equipped with the jack.

The utility model has the positive progress effects that: compared with the existing lifting jack with a bracket, the device has the advantages that the problem that the steel bars and templates of a continuous box girder are easy to collide in the process of lifting the lifting jack or the tower crane to install the lifting jack are easy to damage the lifting jack is avoided, and the problem that a large amount of working time is occupied in the process of installing the lifting jack or the tower crane to cause high cost of stretching process equipment is avoided. The device can adjust the height of the tensioning platform and the front and back, left and right, up and down positions of the jack according to the positions and the number of different pre-stress hole sites; only one-time matching of the automobile crane or the tower crane is needed, and a great amount of time of the automobile crane or the tower crane is not needed to be occupied; has the characteristics of reasonable structure, convenient disassembly, simple manufacture, low cost and repeated use.

Drawings

Fig. 1 is a perspective structural view of a longitudinal prestress beam tensioning platform of a bridge continuous box girder.

Fig. 2 is a front view of a longitudinal prestressed strand tensioning platform of a continuous box girder of a bridge according to the present utility model.

Fig. 3 is a side view of a longitudinal prestressed strand tensioning platform of a continuous box girder of a bridge of the present utility model.

Fig. 4 is a top view of a longitudinal prestressed strand tensioning platform of a continuous box girder of a bridge of the present utility model.

Fig. 5 is a schematic diagram of an up-down adjusting system of a longitudinal prestress beam tensioning platform of a bridge continuous box girder.

Fig. 6 is a schematic diagram of a left-right moving system of the longitudinal prestress beam tensioning platform of the bridge continuous box girder.

Fig. 7 is a schematic diagram of a structure of a back-and-forth moving system of a longitudinal prestress beam tensioning platform of a bridge continuous box girder.

Fig. 8 is a schematic diagram of an application structure of the longitudinal prestress beam tensioning platform of the bridge continuous box girder of the utility model.

Reference numerals illustrate: the lifting adjusting pipe 1, the lifting fixing pipe 2, the ladder fixing frame 3, the lifting fixing bolt 4, the ladder 5, the frame body cross bar 6, the front supporting leg 7, the front supporting leg diagonal bracing 8, the protection plate 9, the fixed pipe long slot 10, the adjusting pipe long slot 11, the first slide rail 12, the second slide rail 13, the third slide rail 14, the cross bar slide slot 15, the front and back movement control rocker 16, the long steel plate 17, the limit buckle 18, the tooth slot 19, the gear 20, the concave pulley 21, the left and right movement control rocker 22, the steel plate slide 23, the auxiliary pulley 24, the convex pulley 25, the upper slot 26, the first steel wire rope 27, the hanging bracket 28, the movable pulley 29, the up and down movement control rocker 30, the steering rod 31, the jack 32, the second steel wire rope 33, the sliding hollow pipe 34 and the limit rod 35.

Detailed Description

The utility model will now be more fully described by way of example only and with reference to the accompanying drawings, but the utility model is not thereby limited to the scope of the examples described.

As shown in figures 1-8, the longitudinal prestress beam tensioning platform for the continuous box girder of the bridge comprises a platform height adjusting system, a front-back moving system, a left-right moving system and an up-down adjusting system, wherein the front-back moving system is arranged above the platform height adjusting system, the left-right moving system is arranged on the inner side of the front-back moving system, and the up-down adjusting system is arranged on the left-right moving system.

Further, the platform height adjusting system comprises a left part system and a right part system, the left part system and the right part system are symmetrically distributed, the left part system comprises a lifting adjusting pipe 1, a lifting fixing pipe 2, a ladder support frame 3, a ladder 5, a frame body cross rod 6, a front supporting leg 7 and a front supporting leg diagonal bracing 8, the lifting fixing pipe 2 is sleeved on the outer side of the lifting adjusting pipe 1, the lifting adjusting pipe 1 is connected with the lifting fixing pipe 2 through a lifting fixing bolt 4, the ladder support frame 3 is arranged on the upper part of the lifting fixing pipe 2, the ladder 5 is arranged on one side of the ladder support frame 3, the frame body cross rod 6 is arranged at the upper end of the lifting adjusting pipe 1, the front supporting leg 7 is arranged at the front part of the frame body cross rod 6, and the front supporting leg diagonal bracing 8 is connected with the front supporting leg 7 through a front supporting leg diagonal bracing 8 fixing bolt.

Further, the lower part of the cat ladder 5 is connected with the cat ladder fixing frame 3, and the upper part of the cat ladder 5 is connected with the frame body cross bar 6.

Further, a protection plate 9 is arranged between the left and right lifting adjusting pipes 1.

Further, the lifting fixing pipe 2 and the lifting adjusting pipe 1 are respectively provided with a fixing pipe long slot 10 and an adjusting pipe long slot 11, and the fixing pipe long slot 10 is connected with the adjusting pipe long slot 11 through a lifting fixing bolt 4.

In the platform height adjusting system shown in fig. 1, a ladder stand 5 is arranged, a lifting fixing pipe 2 of a frame body is sleeved outside a lifting adjusting pipe 1, corresponding through long slotted holes are formed in the two lifting fixing pipes, a fixing pipe long slotted hole 10 and an adjusting pipe long slotted hole 11 are formed in the lifting fixing pipe, lifting fixing bolts 4 penetrate through the long slotted holes to fix the lifting fixing pipes, a front supporting leg 7 long slotted hole is formed in a front supporting leg 7, and a front supporting leg diagonal brace 8 can adjust the height through bolts according to the long slotted holes of the front supporting leg 7; the platform height adjusting system mainly adopts a rectangular pipe to form a long slot hole to adjust the platform height, and adopts bolts for fixation, the cat ladder 5, the cat ladder fixing frame 3, the lifting fixing pipe 2, the lifting adjusting pipe 1, the frame body cross rod 6 and the front supporting leg 7 are all made of rectangular pipes, the front supporting leg diagonal bracing 8 is made of channel steel, and the height adjustment is finished and then the front supporting leg diagonal bracing 8 is fixed by bolts. The cat ladder 5 is fixed on the cat ladder fixing frame 3 of the platform height adjusting system, and the height of the cat ladder 5 is not changed along with the change of the platform height.

Further, the back and forth movement system comprises a first slideway 12, a second slideway 13, a third slideway 14, a cross bar slideway 15, a back and forth movement control rocker 16 and a strip steel plate 17; the left and right sides are equipped with first slide 12, second slide 13, third slide 14 in proper order between the support body horizontal pole 6, first slide 12, third slide 14 set up respectively in two support body horizontal pole 6's both ends, two be equipped with two horizontal pole spouts 15 on the support body horizontal pole 6, the both ends of second slide 13 respectively with two horizontal pole spouts 15 sliding connection, run through on the third slide 14 and be equipped with fore-and-aft movement control rocker 16, two the inboard of support body horizontal pole 6 is equipped with two rectangular steel sheet 17 respectively, two rectangular steel sheet 17 pass through spacing buckle 18 and support body horizontal pole 6 sliding connection, be equipped with tooth groove 19 on the rectangular steel sheet 17, fore-and-aft movement control rocker 16 runs through two rectangular steel sheet 17 respectively and tooth groove 19 meshing connection, the one end and the second slide 13 of rectangular steel sheet 17 are connected.

Further, a gear 20 is arranged on the back-and-forth movement control rocker 16, and the gear 20 is in meshed connection with the tooth groove 19.

Further, the left-right moving system comprises a concave pulley 21, a left-right moving control rocker 22, a steel plate slideway 23, an auxiliary pulley 24, a sliding hollow tube 34 and a convex pulley 25, an upper slotted hole 26 is formed in the upper end of the second slideway 13, the concave pulley 21 is arranged in the upper slotted hole 26, the left-right moving control rocker 22 is arranged on the concave pulley 21, the steel plate slideway 23 is arranged below the second slideway 13, two ends of the steel plate slideway 23 are respectively in sliding connection with the first slideway 12 and the third slideway 14 through the auxiliary pulley 24, a hanging bracket 28 is arranged below the concave pulley 21, a first steel wire rope 27 is arranged between the hanging bracket 28 and the concave pulley 21, a sliding hollow tube 34 is arranged on the first steel wire rope 27, the upper end of the sliding hollow tube 34 is connected with the steel plate slideway 23 through the convex pulley 25, a movable pulley 29 is arranged at the lower end of the sliding hollow tube 34, and the movable pulley 29 is connected with the hanging bracket 28 through the second steel wire rope 33.

Further, a control rod chute is arranged on the third slideway 14, the left-right movement control rocker 22 penetrates through the control rod chute and is connected with the concave pulley 21, a limit rod is arranged at the lower part of the second slideway 13, and a sliding hollow tube 34 is arranged at the inner side of the limit rod.

Further, the up-down adjusting system comprises a first steel wire rope 27, a hanging bracket 28, a movable pulley 29, an up-down movement control rocker 30, a steering rod 31, a jack 32 and a second steel wire rope 33, wherein the concave pulley 21 is connected with the hanging bracket 28 through the first steel wire rope 27, a sliding hollow pipe 34 is arranged on the first steel wire rope 27, the movable pulley 29 is arranged at the lower end of the sliding hollow pipe 34, the up-down movement control rocker 30 is arranged between the left lifting fixed pipe 2 and the right lifting fixed pipe 2, the steering rod 31 is arranged below the first slideway 12, the second steel wire rope 33 is sequentially connected with the hanging bracket 28, the movable pulley 29, the steering rod 31 and the up-down movement control rocker 30, and the jack 32 is arranged below the hanging bracket 28.

As shown in fig. 7, the front-back moving system adopts a long steel plate 17, a tooth slot 19 is arranged in the long steel plate 17, a limit buckle 18 fixes a front-back moving control rocker 16 and the long steel plate 17, a convex pulley 25 slot is arranged on a steel plate slideway 23, the convex pulley 25 is clamped in the convex pulley 25 slot, the convex pulley 25 is welded with the upper end of a sliding hollow tube 34, a movable pulley 29 is welded at the lower end of the sliding hollow tube 34, and the convex pulley 25 is hung on the upper and lower part slideways of the first slideway 12 and the third slideway 14 of the left-right moving system through an auxiliary pulley 24 of the steel plate slideway 23. The long steel plate 17 adopts Q235 steel plate, and tooth grooves 19 on the long steel plate 17 and gears 20 on the back and forth movement control rocker 16 are customized. The other end of the strip steel plate 17 is connected with a second slideway 13, a convex pulley 25 is arranged on the second slideway 13, the convex pulley 25 is connected with a sliding hollow tube 34, and a steel wire rope penetrates through the sliding hollow tube 34 and is connected with a jack 32 through a hanging bracket 28.

As shown in fig. 6, the left-right moving system uses a left-right moving control rocker 22 to shake a moving turntable to move in control rod sliding grooves of the first sliding way 12, the second sliding way 13 and the third sliding way 14, the left-right moving control rocker 22 penetrates through the control rod sliding grooves to be connected with a concave pulley 21, the concave pulley 21 drives a sliding hollow pipe 34 through a first steel wire rope 27, the sliding hollow pipe 34 is connected with a convex pulley 25 of the front-back moving system to drive a jack 32 to move left and right along with the left-right moving control rocker 22, and a steel plate sliding way 23 moves on the first sliding way 12 and the third sliding way 14 through an auxiliary pulley 24; the movable turntable, the left-right movement control rocker 22 and the concave pulley 21 are connected, the movable turntable rotates on the first slideway 12, and the concave pulley 21 slides on the second turntable.

As shown in fig. 5, the up-down adjusting system uses a second wire rope 33 on a rocking up-down control rocker 30, the second wire rope 33 connects a movable pulley 29 with a hanger 28 through a steering rod 31, drives a jack 32 on the hanger 28 to move up and down, and one end of the hanger 28 is suspended with the jack 32 and the other end is connected with the wire rope. The longitudinal prestress beam tensioning platform for the continuous box girder of the bridge is formed by combining the above steps. The second wire rope 33 is wound on the up-and-down movement control rocker 30, the second wire rope 33 turns downwards again through the turning rod 31 and the movable pulley 29 in the left-and-right movement system, and is connected with the hanging bracket 28, and the hanging bracket 28 hangs the jack 32.

The second steel wire rope 33 is turned by the hanging bracket 28 and is connected with the first steel wire rope 27, and the first steel wire rope 27 is turned upwards by the concave pulley 21 and is connected with the hanging bracket 28 downwards, so that a labor-saving pulley block is formed.

The specific implementation method comprises the following steps:

After the whole height of the platform is adjusted by the lifting adjusting pipe 1, the height is fixed by the lifting fixing bolt 4. The control rocker 30 is rocked to move up and down, and the lifting frame 28 is lifted by the lifting jack 32 through the second steel wire rope 33, the steering rod 31 and the movable pulley 29, so that the lifting jack 32 is lifted to a proper height, and the lifting jack 32 is aligned with the tensioning hole position from the up and down direction.

In this embodiment, the rocking of the left and right movement control rocker 22 will drive the concave pulley 21 to rotate on the second slideway 13, and the concave pulley 21 will drive the sliding hollow tube 34 and the convex pulley 25 to move left and right, wherein the sliding hollow tube 34 is driven to move left and right within the range of the upper slot 26 and the limit rod, so that the jack 32 is aligned with the tensioning hole from left and right directions. The control rocker 16 is rocked to move back and forth, the long steel plate 17 is driven by the gear 20 on the control rocker 16 to move along the tooth slot 19 towards the stretching hole position, meanwhile, the long steel plate 17 is connected with the second slideway 13 to drive the concave pulley 21, the sliding hollow tube 34, the hanging frame 28 and the jack 32, so that the jack 32 is aligned with the stretching hole position in the front-back direction. The longitudinal prestress beam tensioning platform for the continuous box girder of the bridge is formed.

In this embodiment, the ladder 5 is welded to a rectangular pipe and fixed to the ladder holder 3. The landing leg 7 before this platform is placed on the roof beam, and the position of landing leg bracing 8 adopts fixing bolt to fix before the adjustment, and landing leg 7 adopts rectangular pipe fluting preparation before, and landing leg bracing 8 adopts the channel-section steel fluting preparation before. The lifting fixing pipe 2 and the lifting adjusting pipe 1 are respectively lifted and adjusted through the fixing pipe long slot holes 10 and the adjusting pipe long slot holes 11, are manufactured by purchasing rectangular pipe slotted holes with different sections on the market, are fixed by adopting the lifting fixing bolts 4, and can also be purchased from the market. The height adjusting system of the longitudinal prestress beam tensioning platform of the continuous box girder is formed.

In this embodiment, the up-down movement control rocker 30 and the steering rod 31 are made of plain round bars, the movable pulley 29 is required to be customized, and the first wire rope 27, the second wire rope 33, the hanger 28 and the jack 32 are purchased from the market.

In this embodiment, the first slideway 12, the second slideway 13 and the third slideway 14 are all formed by welding steel plates with different sizes, the moving turntable is formed by welding a left-right moving control rocker 22, the left-right moving control rocker 22 is welded with a concave pulley 21, and the moving turntable and the concave pulley 21 rotate together with the left-right moving control rocker 22, wherein the moving turntable and the concave pulley 21 are all ordered, and the left-right moving control rocker 22 is made of round steel.

In this embodiment, the long steel plate 17 and the tooth slot 19 are made by forming the tooth slot 19 on the Q steel plate, the tooth slot 19 is matched with the gear 20, the limit buckle 18 is welded and fixed with the first slideway 12, and the control rocker 16 moves back and forth to pass through the limit buckle 18 so as to fix the rocker. The control rocker 16 is made of round steel, and the limiting buckle 18 needs to be customized. The convex pulley 25 and the sliding hollow tube 34 are welded, the first steel wire rope 27 is penetrated in the sliding hollow tube 34, and the length of the first steel wire rope 27 is long enough to meet the length of up-down adjustment. The strip steel plate 17 drives the second slideway 13 to move forwards and backwards together, the first steel wire rope 27 is arranged in the concave pulley 21, the first steel wire rope 27 penetrates through the sliding hollow tube 34, and the sliding hollow tube 34 is fixed on the movable pulley 29 and moves forwards and backwards together through the steel plate slideway 23. Wherein, the convex pulley 25, the sliding hollow tube 34 and the concave pulley 21 all need to be customized, the steel plate slideway 23 is made of steel plates, and the first steel wire rope 27 is purchased from the market.

The front support leg 7 is placed on the top surface of the box girder, and the front support leg diagonal bracing 8 is adjusted to a proper angle through the front support leg 7 fixing bolt and then screwed down. Lifting jack 32 is hung on the longitudinal prestress beam tensioning platform through hanging frame 28, lifting fixing bolt 4 is loosened, lifting fixing pipe 2 is kept motionless, lifting adjusting pipe 1 is adjusted to a proper height, lifting fixing bolt 4 is screwed through fixing pipe long slot hole 10 and transverse rod long slot hole, and platform height adjustment is completed.

The control rocker 30 is rocked to move up and down, the lower end of the second steel wire rope 33 is wound on the control rocker 30 to move up and down, the second steel wire rope 33 is wound on the movable pulley 29 to the hanging bracket 28 through the steering rod 31, and the jack 32 is hung on the hanging bracket 28 to finish the up and down height adjustment.

The rocking left-right movement control rocker 22 drives the concave pulley 21 to rotate left and right, a suspension steel wire rope and a sliding hollow tube 34 are arranged on the concave pulley 21, the sliding hollow tube 34, the convex pulley 25 and the steel plate slideway 23 are driven to move left and right, wherein an auxiliary pulley 24 on hanging rings at two ends of the steel plate slideway 23 slides on the first slideway 12 and the third slideway 14 along with the steel plate slideway 23, and the left-right direction position adjustment is completed.

The control rocker 16 is rocked to move forwards and backwards, the gear 20 on the control rocker 16 moves forwards and backwards along with the rotation of the control rocker 16, the gear is matched with the tooth groove 19 to drive the long steel plate 17 to move forwards and backwards, the long steel plate 17 drives the concave pulley 21, the first steel wire rope 27, the sliding hollow tube 34 and the convex pulley 25 on the second slideway 13 to move forwards and backwards in the groove hole of the convex pulley 25 on the steel plate slideway 23, and the position adjustment in the front and rear directions is completed. And (5) after the tensioning construction is completed, the tensioning construction is accommodated, and the tensioning construction is recycled next time.

In the embodiment, the device can be adjusted and installed on the basis of the device according to the requirements of different box girder heights and different prestress tensioning hole numbers on site, so that the device meets the requirements of tensioning construction of a longitudinal prestress beam tensioning platform.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.

Claims (10)

1. A bridge continuous box girder longitudinal prestress beam tensioning platform is characterized in that: the device comprises a platform height adjusting system, a front-back moving system, a left-right moving system and an up-down adjusting system, wherein the front-back moving system is arranged above the platform height adjusting system, the left-right moving system is arranged on the inner side of the front-back moving system, and the up-down adjusting system is arranged on the left-right moving system.

2. A bridge continuous box girder longitudinal prestress beam tensioning platform as claimed in claim 1, wherein: the platform height adjusting system comprises a left part system and a right part system, wherein the left part system and the right part system are symmetrically distributed, the left part system comprises a lifting adjusting pipe, a lifting fixing pipe, a ladder fixing frame, a ladder, a frame body cross rod, a front supporting leg and a front supporting leg diagonal brace, the lifting fixing pipe is sleeved on the outer side of the lifting adjusting pipe, the lifting adjusting pipe is connected with the lifting fixing pipe through a lifting fixing bolt, the ladder fixing frame is arranged on the upper part of the lifting fixing pipe, a ladder stand is arranged on one side of the ladder fixing frame, the frame body cross rod is arranged at the upper end of the lifting adjusting pipe, the front supporting leg is arranged at the front part of the frame body cross rod, and the front supporting leg diagonal brace is connected with the front supporting leg through a front supporting leg diagonal brace fixing bolt.

3. A bridge continuous box girder longitudinal prestress beam tensioning platform as claimed in claim 2, wherein: the lower part of cat ladder is connected with cat ladder mount, and the upper portion of cat ladder is connected with the support body horizontal pole.

4. A bridge continuous box girder longitudinal prestress beam tensioning platform as claimed in claim 3, wherein: a protection plate is arranged between the left lifting adjusting pipe and the right lifting adjusting pipe.

5. A bridge continuous box girder longitudinal prestress beam tensioning platform as claimed in claim 4, wherein: the lifting fixing pipe and the lifting adjusting pipe are respectively provided with a fixing pipe long slot and an adjusting pipe long slot, and the fixing pipe long slot is connected with the adjusting pipe long slot through a lifting fixing bolt.

6. A bridge continuous box girder longitudinal prestress beam tensioning platform as claimed in claim 5, wherein: the front-back moving system comprises a first slideway, a second slideway, a third slideway, a cross bar chute, a front-back moving control rocker and a strip steel plate; the left side is equipped with first slide, second slide, third slide in proper order between the support body horizontal pole, first slide, third slide set up respectively in two the both ends of support body horizontal pole, two be equipped with two horizontal pole spouts on the support body horizontal pole, the both ends of second slide respectively with two horizontal pole spout sliding connection, run through on the third slide and be equipped with fore-and-aft movement control rocker, two the inboard of support body horizontal pole is equipped with two rectangular steel sheets respectively, and two rectangular steel sheets pass through spacing buckle and support body horizontal pole sliding connection, be equipped with the tooth's socket on the rectangular steel sheet, fore-and-aft movement control rocker runs through two rectangular steel sheets respectively and is connected with the tooth's socket meshing, the one end and the second slide of rectangular steel sheet are connected.

7. The bridge continuous box girder longitudinal prestress beam tensioning platform of claim 6, wherein: the front-back movement control rocker is provided with a gear, and the gear is connected with the tooth slot in a meshed manner.

8. A bridge continuous box girder longitudinal prestress beam tensioning platform as claimed in claim 7, wherein: the left-right moving system comprises a concave pulley, a left-right moving control rocker, a steel plate slideway, an auxiliary pulley, a sliding hollow pipe and a convex pulley, wherein an upper slot hole is formed in the upper end of the second slideway, the concave pulley is arranged in the upper slot hole, the left-right moving control rocker is arranged on the concave pulley, the steel plate slideway is arranged below the second slideway, two ends of the steel plate slideway are respectively in sliding connection with the first slideway and the third slideway through the auxiliary pulley, a hanging bracket is arranged below the concave pulley, a first steel wire rope is arranged between the hanging bracket and the concave pulley, a sliding hollow pipe is arranged on the first steel wire rope, the upper end of the sliding hollow pipe is connected with the steel plate slideway through the convex pulley, and a movable pulley is arranged at the lower end of the sliding hollow pipe and is connected with the hanging bracket through the second steel wire rope.

9. A bridge continuous box girder longitudinal prestress beam tensioning platform as claimed in claim 8, wherein: the third slideway is provided with a control rod chute, the left-right movement control rocker penetrates through the control rod chute and is connected with the concave pulley, the lower part of the second slideway is provided with a limit rod, and the inner side of the limit rod is provided with a sliding hollow tube.

10. A bridge continuous box girder longitudinal prestress beam tensioning platform as claimed in claim 9, wherein: the vertical adjustment system comprises a first steel wire rope, a hanging bracket, movable pulleys, vertical movement control rockers, a steering rod, a jack and a second steel wire rope, wherein the concave pulleys are connected with the hanging bracket through the first steel wire rope, a sliding hollow pipe is arranged on the first steel wire rope, the lower end of the sliding hollow pipe is provided with the movable pulleys, vertical movement control rockers are arranged between the left lifting fixed pipe and the right lifting fixed pipe, the steering rod is arranged below the first slideway, the second steel wire rope is sequentially connected with the hanging bracket, the movable pulleys, the steering rod and the vertical movement control rockers, and the jack is arranged below the hanging bracket.