CN214882965U - Steel case roof beam cable-stay bridge cable beam anchor structure - Google Patents

Abstract

The utility model relates to a steel box girder cable-stay bridge cable-girder anchoring structure relates to the field that the bridge was built, and it includes first sleeve, first centre bore has been seted up to first sleeve, is equipped with the stretch-draw pole in the first centre bore, the inside cavity of stretch-draw pole, and first centre bore and stretch-draw pole all reduce gradually along self length direction's one end diameter, leave the clearance between stretch-draw pole and the first centre bore, the less one end of stretch-draw pole diameter has a plurality of first balls along circumference roll connection, the stretch-draw pole overcoat is equipped with first reset spring, under the first reset spring natural state, first ball all with first centre bore inner wall puller, it is comparatively convenient when this application carries out longer length stretch-draw.

Description

Steel case roof beam cable-stay bridge cable beam anchor structure

Technical Field

The application relates to the field of bridge construction, in particular to a cable-girder anchoring structure of a steel box girder cable-stayed bridge.

Background

The cable-stayed bridge is a bridge with a main beam directly pulled on a bridge tower by a stay cable, and is a structural system formed by combining a pressure-bearing bridge tower, a pulled steel cable and a bending-bearing beam body; the cable-stayed bridge has the advantages of strong spanning capability and small structural weight.

In the related art, reference is made to a Chinese patent with publication number CN101922240A, which discloses a tensioning and anchoring device for applying prestress to an FRP rib, wherein the tensioning and anchoring device comprises an anchoring device for anchoring the FRP rib and a tensioning device for tensioning the FRP rib; the anchoring device comprises an anchoring frame, a first sleeve and a limiting member, the anchoring frame is fixedly connected with an anchoring area at the end part of the member to be reinforced, the first sleeve penetrates through the anchoring frame and is used for anchoring the FRP rib, and the limiting member is connected to the first sleeve and is used for limiting the first sleeve after the FRP rib is stretched; the tensioning device comprises a force application device and a soft rope, wherein the force application device is connected with the first sleeve through the soft rope and is used for applying traction force for tensioning the FRP ribs. The device can simply and conveniently realize the tensioning of the FRP bars and the anchoring of the FRP bars after tensioning.

In view of the above-mentioned related arts, the inventor believes that the above-mentioned anchoring device has a limited length of tension to the reinforcing steel bar when in use, and when the length of the steel cable to be tensioned is large, the above-mentioned anchoring device requires much effort to disassemble and reassemble, and is not suitable for rapidly tensioning a long length.

SUMMERY OF THE UTILITY MODEL

In order to facilitate the tensioning of longer length, the application provides a steel box girder cable-stayed bridge cable beam anchor structure.

The application provides a steel box girder cable-stay bridge cable-beam anchoring structure adopts following technical scheme:

the utility model provides a steel box girder cable-stay bridge cable-girder anchor structure, includes first sleeve, first centre bore has been seted up to first sleeve, is equipped with the stretch-draw pole in the first centre bore, the inside cavity of stretch-draw pole, first centre bore and stretch-draw pole all reduce gradually along self length direction's one end diameter, leave the clearance between stretch-draw pole and the first centre bore, the less one end of stretch-draw pole diameter has a plurality of first balls along circumference roll connection, the stretch-draw pole overcoat is equipped with first reset spring, under the first reset spring natural state, first ball all with first centre bore inner wall jack-up.

By adopting the technical scheme, the steel cable penetrates through the interior of the tension rod, a user pulls the first sleeve to the free end of the steel cable, the tension rod is clamped by the first ball bearings from different directions under the action of the first return spring and synchronously moves along with the first sleeve to realize tension; the user removes first sleeve to the direction that deviates from the cable wire free end, and first spring is compressed and then makes first ball lose the clamping action to the cable wire, realizes carrying out the tensioning of longer length comparatively conveniently to cable wire circulation stretch-draw.

Optionally, the outer sliding connection of first sleeve has two guide posts, has set firmly the connecting block between two guide posts, and the connecting block is located one side that first sleeve is close to first ball, and a plurality of fixed orificess have been seted up to the connecting block.

Through adopting above-mentioned technical scheme, the user utilizes the fixed orifices to fix the guide post, and then is convenient for lead to first sleeve, and first sleeve is difficult for driving the cable wire and takes place axial deflection, is difficult for influencing wearing and tearing cable wire influence life when stretch-draw.

Optionally, the connecting block has set firmly the second sleeve, and the second centre bore has been seted up to the second sleeve, is equipped with hollow anchor rod in the second centre bore, and the anchor rod cover is equipped with second reset spring, and second centre bore and anchor rod deviate from first telescopic one end diameter and all reduce gradually, and the anchor rod deviates from first telescopic one end and has a plurality of second balls along circumference roll connection, and under the second reset spring natural state, the second ball all with second centre bore inner wall top tightly.

Through adopting above-mentioned technical scheme, during first sleeve stretch-draw cable wire, second reset spring is compressed, and the cable wire slides in the anchor pole, and when the cable wire slided in the stretch-draw pole, second reset spring kick-backed makes the tight cable wire of second ball clamp, and the difficult anchorage device that leads to because of stretch-draw of cable wire is not hard up takes place to kick-back, has improved the stretch-draw effect.

Optionally, two the guide way has all been seted up to the one side that the guide post is close to each other, and first sleeve has set firmly two guide blocks, and two guide blocks imbed respectively in two guide ways and the guide post sliding connection who corresponds, all set firmly the cylinder in two guide ways, the output of two cylinders respectively with two guide block fixed connection.

Through adopting above-mentioned technical scheme, the cylinder drives first sleeve and slides between two guide posts, realizes the cable wire circulation stretch-draw automatically, and first sleeve is difficult for taking place to rotate, and the damage of stretch-draw process to the cable wire is less.

Optionally, the one end that first sleeve deviates from first ball and the equal threaded connection of one end that the second sleeve deviates from the second ball have a stopper, and the through-hole has all been seted up to the stopper, and stretch-draw pole and anchor board pass corresponding through-hole and equal sliding connection respectively have an anchor ring, and anchor ring is along the direction diameter grow gradually that deviates from the connecting block, and a plurality of bar grooves have been seted up to the great one end of anchor ring diameter.

By adopting the technical scheme, the anchoring ring slides relative to the anchoring rod or the tension rod under the action of friction force, so that the clamping capacity of the anchoring rod and the tension rod to the steel cable is enhanced, and the tension capacity is improved.

Optionally, the inner wall of the anchoring ring is provided with anti-slip lines.

Through adopting above-mentioned technical scheme, the frictional force between anti-skidding line increase cable wire and the anchor ring, and then improved the result of use.

Optionally, the limiting block all sets firmly spacing cover, spacing cover set up with the spacing groove of anchor ring adaptation, the round hole has all been seted up to the one end that spacing cover deviates from the connecting block, the round hole diameter is less than the maximum diameter of anchor ring.

Through adopting above-mentioned technical scheme, when the cable wire removed, the anchor ring of stretch-draw pole and anchor rod slided in the spacing groove that corresponds, and difficult emergence is dropped and is influenced the result of use.

Optionally, two the guide post deviates from the one end of connecting block and can dismantle and be connected with the reinforcement piece.

Through adopting above-mentioned technical scheme, reinforcing block cooperation connecting block is fixed two guide bars from both ends, and two guide bars are difficult for taking place to buckle and influence the first telescopic slip, are favorable to increase of service life.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the first sleeve and the tension rod, the steel cable penetrates through the tension rod, a user pulls the first sleeve to the free end of the steel cable, and the tension rod is clamped by the first ball bearings from different directions under the action of the first return spring and synchronously moves along with the first sleeve to realize tension; a user moves the first sleeve in the direction departing from the free end of the steel cable, the first spring is compressed, so that the first ball loses the clamping effect on the steel cable, the steel cable is circularly tensioned, and the longer-length tensioning is more convenient;

2. through setting up the anchor ring, the anchor ring takes place relative slip with anchor rod or stretch-draw pole under the frictional force effect, is favorable to strengthening the clamping capacity of anchor rod and stretch-draw pole to the cable wire, has improved the stretch-draw ability.

Drawings

Fig. 1 is a schematic view of the overall structure of a cable-girder anchoring structure of a steel box girder cable-stayed bridge.

Fig. 2 is a schematic sectional view of a cable-girder anchoring structure of a steel box girder cable-stayed bridge.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

Fig. 4 is an enlarged schematic view of a portion B in fig. 2.

Description of reference numerals: 1. a guide post; 11. connecting blocks; 12. a reinforcing block; 2. a first sleeve; 21. a first central aperture; 22. stretching a pull rod; 23. a first ball bearing; 24. a first return spring; 25. a guide block; 3. a limiting block; 4. a second sleeve; 41. a second central aperture; 42. an anchoring rod; 43. a second ball bearing; 44. a second return spring; 5. an anchoring ring; 6. a guide groove; 61. a cylinder; 7. a limiting cover; 71. a limiting groove; 72. a circular hole.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses steel box girder cable-stayed bridge cable beam anchoring structure.

Referring to fig. 1 and 2, the cable-beam anchoring structure of the steel box-beam cable-stayed bridge comprises two guide columns 1, wherein the two guide columns 1 are made of solid metal materials, are not easy to deform and have long service life; two guide post 1 parallel arrangement each other, install connecting block 11 and reinforcing block between two guide post 1, connecting block 11 and reinforcing block are located 1 length direction's of guide post both ends respectively, connecting block 11 and reinforcing block carry on spacingly to two guide post 1's both ends respectively, make two guide post 1 remain the parallel state throughout and the difficult emergence of interval changes, a plurality of fixed orificess have all been seted up along length direction's both sides to connecting block 11, the user utilizes the bolt to pass fixed orifices and fixes connecting block 11.

Referring to fig. 2 and 3, the connecting block 11 is provided with a first connecting hole, a user penetrates a free end of the steel cable into the first connecting hole, the connecting block 11 is fixedly provided with a second sleeve 4, the second sleeve 4 is coaxially arranged with the first connecting hole, a second central hole 41 is formed in the center of the second sleeve 4, and the steel cable enters the second central hole 41 through the first connecting hole; an anchor rod 42 is installed in the second center hole 41, the anchor rod 42 is hollow and is coaxially arranged with the second sleeve 4, and the steel cable is inserted into the anchor rod 42.

Referring to fig. 1 and 3, the one end sliding connection that anchor rod 42 deviates from connecting block 11 has anchor ring 5, anchor ring 5 is the frustum form, and along the direction external diameter that deviates from anchor rod 42 grow gradually, the internal diameter of anchor ring 5 is unchangeable along length direction, the cable wire gets into in anchor ring 5 through anchor rod 42, the inner wall of anchor ring 5 is equipped with anti-skidding line, 5 inner wall roughness of anchor ring is great promptly, the cable wire drives anchor ring 5 and slides in the direction of anchor ring 5 dorsad under the effect of frictional force.

Referring to fig. 1 and 3, a limiting cover 7 is fixedly mounted at one end of the anchor rod 42, which is far away from the connecting block, the limiting cover 7 and the anchor rod 42 are coaxially arranged, a limiting groove 71 is formed in the center of the limiting cover 7, the diameter of the limiting groove 71 is matched with the maximum diameter of the anchor ring 5, and the anchor ring 5 is driven by a steel cable to slide in the limiting groove 71; a round hole 72 is formed in one end, away from the connecting block 11, of the limiting cover 7, and the steel cable penetrates through the limiting cover 7 through the round hole 72 and then extends between the two guide columns 1; the diameter of the round hole 72 is smaller than the maximum diameter of the anchoring ring 5, the length of the limiting cover 7 is smaller than that of the anchoring ring 5, the limiting cover 7 limits the anchoring ring 5, and the anchoring ring 5 is not easy to break away from the anchoring rod 42.

Referring to fig. 1 and 4, a first sleeve 2 is installed between two guide posts 1, a first central hole 21 is formed in the first sleeve 2, a steel cable is inserted into the first central hole 21 by a user, an extension rod 22 is installed in the first central hole 21, the extension rod 22 and the first sleeve 2 are coaxially arranged, the extension rod 22 is hollow inside, the steel cable is inserted into the extension rod 22, one end, deviating from the second sleeve 4, of the extension rod 22 is provided with a same anchoring ring 5 and a limiting cover 7, the steel cable penetrates through the anchoring ring 5 and the limiting cover 7 of the extension rod 22 to be separated from the first sleeve 2, and is close to a reinforcing block, a second connecting hole coaxial with the first connecting hole is formed in the reinforcing block, and the steel cable penetrates out of the reinforcing block through the second connecting hole.

Referring to fig. 1, guide grooves 6 are formed in the sides, close to each other, of the two guide posts 1; first sleeve 2 fixed mounting have two with the guide block 25 of guide way 6 adaptation, two guide blocks 25 imbed respectively in two guide ways 6 and with the guide post 1 sliding connection that corresponds, the user promotes first sleeve 2 to the direction that guide post 1 is close to second sleeve 4.

Referring to fig. 1 and 3, the connecting block 11 is fixedly provided with two cylinders 61, the two cylinders 61 correspond to the two guide posts 1 one by one, the output ends of the two cylinders 61 respectively extend to the output ends of the two cylinders 61 in the guide grooves 6 of the corresponding guide posts 1 and are respectively fixedly connected with the guide blocks 25 in the corresponding guide grooves 6, and a user starts the cylinders 61 and drives the first sleeve 2 to move along the length direction of the guide posts 1 through the guide blocks 25.

Referring to fig. 3 and 4, the equal threaded connection in one end that first sleeve 2 and second sleeve 4 deviate from connecting block 11 (refer to fig. 1) has stopper 3, the through-hole has all been seted up to stopper 3, anchor rod 42 and stretch-draw rod 22 respectively with pass the through-hole that corresponds stopper 3 and the stopper 3 sliding connection that corresponds, install first reset spring 24 between stretch-draw rod 22 and the stopper 3 that corresponds, when first sleeve 2 deviates from second sleeve 4 and slides, first reset spring 24 is not stressed, its elastic reaction force will stretch-draw rod 22 and promote to the direction that is close to second sleeve 4.

Referring to fig. 1 and 4, frictional force between 2 interior cable wires of first sleeve and the anchor ring 5 makes the cable wire drive anchor ring 5 and slides to the direction that is close to stretch-draw pole 22, anchor ring 5 along the direction diameter grow gradually that deviates from connecting block 11, anchor ring 5 gradually with stretch-draw pole 22 top tight, a plurality of bar grooves have been seted up to the great one end of 5 diameters of anchor ring, under the effect of cable wire, the bar groove is by extrusion deformation, 5 clamp force grow to the cable wire of anchor ring simultaneously, and cooperate first reset spring 24 to promote stretch-draw pole 22 to the direction that is close to second sleeve 4.

Referring to fig. 2 and 4, the diameters of the first center hole 21 and the end of the tension rod 22 close to the second sleeve 4 are both gradually reduced, the end of the tension rod 22 close to the second sleeve 4 is connected with three first balls 23 in a rolling manner at equal intervals along the circumferential direction, the first balls 23 are both communicated with the interior of the tension rod 22, the tension rod 22 drives the first balls 23 to abut against the hole wall of the first center hole 21 under the action of the anchoring ring 5 and the first return spring 24, at the moment, the three first balls 23 are mutually matched to tightly squeeze the steel cable from different directions, so that the steel cable is moved by the tension rod 22 in a direction away from the second sleeve 4.

Referring to fig. 2 and 4, when the first sleeve 2 moves to the position where the guide post 1 deviates from one end of the second sleeve 4, the user controls the cylinder 61 (refer to fig. 4) to contract, and drives the first sleeve 2 to move towards the direction close to the second sleeve 4, at this time, the anchoring ring 5 of the tension rod 22 slides towards the corresponding limiting cover 7, and the clamping effect on the steel cable is lost, meanwhile, the first return spring 24 is compressed, the first ball 23 also loses the clamping effect on the steel cable, and the tension rod 22 slides relative to the steel cable until the first sleeve 2 returns to the position close to the second sleeve 4, and the steel cable is tensioned again, and the steel cable can be tensioned circularly, so that the long length tensioning is facilitated.

Referring to fig. 1 and 3, the anchorage device for fixing the steel cable is easily loosened temporarily in the stretching process, the steel cable is easily retracted in the resetting process of the first sleeve 2, the second return spring 44 is installed between the anchoring rod 42 and the corresponding limiting block 3, the steel cable is retracted to pull the anchoring ring 5 of the anchoring rod 42 to clamp the steel cable, and meanwhile, the anchoring rod 42 slides in the second sleeve 4.

Referring to fig. 2 and 3, anchor rod 42 cover is equipped with second reset spring 44, the one end diameter that second centre bore 41 and anchor rod 42 deviate from first sleeve 2 all reduces gradually, anchor rod 42 deviates from the one end of first sleeve 2 and has three second ball 43 along circumference equidistant roll connection, three second ball 43 all communicates with anchor rod 42 is inside, tight with second centre bore 41 inner wall top under anchor rod 42's effect, press from both sides the cable wire from equidirectional tight simultaneously, and then at first sleeve 2 reset in-process, fix the cable wire automatically, the difficult longer retraction that takes place of cable wire, tensioning effect has been improved.

The implementation principle of the cable-beam anchoring structure of the steel box girder cable-stayed bridge is as follows: a user starts the air cylinder 61, the first sleeve 2 is driven by the guide block 25 to slide in a direction away from the second sleeve 4, the anchoring ring 5 is matched with the first return spring 24 to push the tension rod 22 in a direction close to the second sleeve 4, and the three first balls 23 are matched with each other to tightly squeeze the steel cable in different directions, so that the steel cable is moved in a direction away from the second sleeve 4 by the tension rod 22; first sleeve 2 removes when deviating from the position of 4 one ends of second sleeve to guide post 1, user control cylinder 61 contracts, drive first sleeve 2 and remove to the direction that is close to second sleeve 4, stretch-draw bar 22's anchor ring 5 slides to the spacing cover 7 that corresponds this moment, lose the clamping action to the cable wire, first reset spring 24 is compressed simultaneously, first ball 23 also loses the clamp tight to the cable wire, stretch-draw bar 22 takes place relative slip with the cable wire, reset to the position that is close to second sleeve 4 until first sleeve 2, stretch-draw to the cable wire again, can circulate and stretch-draw to the cable wire, be convenient for carry out the stretch-draw of longer length.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a steel box girder cable-stay bridge cable-beam anchor structure, includes first sleeve (2), its characterized in that: first centre bore (21) have been seted up in first sleeve (2), be equipped with stretch-draw pole (22) in first centre bore (21), stretch-draw pole (22) inside cavity, first centre bore (21) and stretch-draw pole (22) all reduce gradually along self length direction's one end diameter, leave the clearance between stretch-draw pole (22) and first centre bore (21), the less one end of stretch-draw pole (22) diameter has a plurality of first balls (23) along circumference roll connection, stretch-draw pole (22) overcoat is equipped with first reset spring (24), under first reset spring (24) natural state, first ball (23) all with first centre bore (21) inner wall top tightly.

2. The cable-girder anchoring structure of the steel box girder cable-stayed bridge according to claim 1, wherein: the outer sliding connection of first sleeve (2) has two guide posts (1), has set firmly connecting block (11) between two guide posts (1), and connecting block (11) are located one side that first sleeve (2) are close to first ball (23), and a plurality of fixed orificess have been seted up in connecting block (11).

3. The cable-girder anchoring structure of the steel box girder cable-stayed bridge according to claim 2, wherein: connecting block (11) have set firmly second sleeve (4), second centre bore (41) have been seted up in second sleeve (4), be equipped with hollow anchor rod (42) in second centre bore (41), anchor rod (42) cover is equipped with second reset spring (44), the one end diameter that second centre bore (41) and anchor rod (42) deviate from first sleeve (2) all reduces gradually, the one end that anchor rod (42) deviate from first sleeve (2) has a plurality of second ball (43) along circumference roll connection, under second reset spring (44) natural state, second ball (43) all with second centre bore (41) inner wall top tight.

4. The cable-girder anchoring structure of the steel box girder cable-stayed bridge according to claim 2, wherein: two guide way (6) have all been seted up to one side that guide post (1) is close to each other, and first sleeve (2) have set firmly two guide blocks (25), and in embedding two guide ways (6) respectively with guide post (1) sliding connection that corresponds, cylinder (61) have all set firmly in two guide ways (6), the output of two cylinders (61) respectively with two guide blocks (25) fixed connection.

5. The cable-girder anchoring structure of a steel box girder cable-stayed bridge according to claim 3, wherein: the one end that first sleeve (2) deviate from first ball (23) and second sleeve (4) deviate from the equal threaded connection of one end of second ball (43) have stopper (3), and the through-hole has all been seted up in stopper (3), and stretch-draw pole (22) and anchor board pass corresponding through-hole and equal sliding connection have anchor ring (5) respectively, and anchor ring (5) are along the direction diameter that deviates from connecting block (11) grow gradually, and a plurality of bar grooves have been seted up to the great one end of anchor ring (5) diameter.

6. The cable-girder anchoring structure of a steel box girder cable-stayed bridge according to claim 5, wherein: the inner wall of the anchoring ring (5) is provided with anti-skid lines.

7. The cable-girder anchoring structure of a steel box girder cable-stayed bridge according to claim 5, wherein: limiting blocks (3) all set firmly limiting cover (7), limiting groove (71) with anchor ring (5) adaptation is seted up in limiting cover (7), and round hole (72) have all been seted up to limiting cover (7) one end that deviates from connecting block (11), and round hole (72) diameter is less than the maximum diameter of anchor ring (5).

8. The cable-girder anchoring structure of the steel box girder cable-stayed bridge according to claim 2, wherein: two the guide post (1) deviates from the one end of connecting block (11) and can dismantle and be connected with the reinforcement piece.

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