CN213571583U

CN213571583U - Cable strand midspan sag adjustment retraction system

Info

Publication number: CN213571583U
Application number: CN202022235515.3U
Authority: CN
Inventors: 俞川林; 徐英刚; 吴勇; 黄福兵
Original assignee: Chongqing Traffic Engineering Supervision Consulting Co ltd
Current assignee: Chongqing Traffic Engineering Supervision Consulting Co ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-06-29
Anticipated expiration: 2030-10-09

Abstract

The application relates to a system is receive and release in adjustment of strand midspan sag, it is including setting up in the hoist engine at top of the tower portal top, connecting in the first stay cord of the tensile end of hoist engine and centre gripping in the stretch-draw anchor clamps of strand, the one end that the hoist engine was kept away from to first stay cord is connected in stretch-draw anchor clamps, and the top of the tower portal is fixed with the reaction frame that is used for stabilizing the hoist engine atress, the hoist engine is installed in the reaction frame. This application has the effect of being convenient for adjust the strand sag.

Description

Cable strand midspan sag adjustment retraction system

Technical Field

The application relates to the field of strand sag adjusting devices, in particular to a strand mid-span sag adjusting and retracting system.

Background

A suspension bridge is a bridge with cables (or steel chains) which are suspended and anchored on two banks or main towers through cable towers as main bearing members of an upper structure, the main towers are arranged in the two banks or river channels, when construction is carried out, catwalks are often erected after the construction of the main towers to serve as an operation platform for main cable construction, then door frames are arranged above the main towers to be used for a construction platform erected on the main towers by cable strands and an installation platform of hoisting equipment, and the main cables are mainly formed by winding one reference cable strand and a plurality of cable strands arranged around the reference cable strand through a wire winding machine.

The sag measurement of a common cable strand is based on a reference cable strand as a reference, so the sag adjustment precision of the reference cable strand determines the erection precision of the whole main cable, and the sag of the reference cable is often required to be adjusted for the stability of use after construction is finished.

In view of the above-mentioned related art, the inventor believes that during the adjustment process, manual adjustment requires manual operation of a portal frame on a main tower by a constructor, so that it is relatively inconvenient to adjust the sag of a strand.

SUMMERY OF THE UTILITY MODEL

To facilitate adjusting the sag of a strand, the present application provides a strand mid-span sag adjustment retraction system.

The utility model provides a system that receive and releases is adjusted to strand midspan sag adopts following technical scheme:

the utility model provides a system is receive and release in adjustment of strand midspan sag, is including setting up in the hoist engine at top of the tower portal, connecting in the tensile first stay cord of the tensile end of hoist engine and centre gripping in the stretch-draw anchor clamps of strand, the one end that the hoist engine was kept away from to first stay cord is connected in stretch-draw anchor clamps, and the top of the tower portal is fixed with the reaction frame that is used for stabilizing the hoist engine atress, the hoist engine is installed in the reaction frame.

Through adopting above-mentioned technical scheme, when using, only need to grasp the strand through stretch-draw anchor clamps, then drive the hoist engine shrink and stimulate first stay cord, move towards hoist engine one side with the pulling strand and can adjust the degree of sag that the strand needs the adjustment position, simultaneously because the weight of the strand on the suspension bridge is great relatively, can effectively optimize the hoist engine through the tensile strand of first stay cord through the reaction frame when, the stability of hoist engine itself, simultaneously can effectual optimization adjustment strand degree of sag's convenience.

Optionally, the tensioning clamp is provided with two and both centre gripping in the strand, two the strand is connected with the balanced rope that is used for balancing the atress, the one end that the hoist engine was kept away from to first stay cord is provided with the guide pulley, the guide pulley is located to balanced rope sling.

By adopting the technical scheme, when the first pull rope is contracted, the position of the guide wheel relative to the balance rope can be adjusted by driving the guide wheel to rotate through the balance rope or sliding along the wheel groove of the guide wheel; simultaneously, the cable strand is pulled through the two tensioning clamps, the effect of pulling the cable strand can be effectively optimized, and the possibility that the position adjustment amplitude is insufficient due to the bending of the cable strand is reduced.

Optionally, one end of the first pull rope, which is far away from the winch, is fixedly connected with a first fixing plate, the first fixing plate is of a channel steel-shaped structure, and the guide wheel is rotatably connected to the inner side of the first fixing plate.

Through adopting above-mentioned technical scheme, when using, can restrict balanced rope through first fixed plate, can make the relative first fixed plate of guide pulley rotate and optimize the effect of the relative balanced rope position of guide pulley simultaneously.

Optionally, the reaction frame includes a mounting seat fixed on the tower top gantry, a frame body fixed on the top of the mounting seat, and a jack fixed on the frame body, the winch is mounted on the mounting seat, the cable strand extends from the winch towards the jack, and the jack is abutted to the base of the winch.

Through adopting above-mentioned technical scheme, when using, the jack supports the base of locating the hoist engine, can make the hoist engine when through the tensile stretch-draw anchor clamps of first stay cord, the power that the hoist engine received can pass through the jack and transmit to the support body, and then transmit to the mount pad to make when using, the load that the hoist engine bore can effectual transmission to the top of the tower portal, reduces the shearing force that connecting portion between mount pad and the top of the tower portal received, in order to optimize the result of use.

Optionally, stretch-draw anchor clamps include mounting and holder, the mounting includes the pressure strip and the second fixed plate through the mutual fastening of bolt, the restriction groove of two fixed slots and two fixed slots of intercommunication is all seted up to second fixed plate and pressure strip opposite side, balanced rope by the centre gripping between the fixed slot on second fixed plate and pressure strip and between the restriction groove, the holder includes two grip blocks that are arc platelike structure, one of them the grip block universal articulation is in the second fixed plate, and the strand is by the centre gripping between two grip blocks and both all pass through bolt-up.

Through adopting above-mentioned technical scheme, when using, the strand is through being connected in the holder by two grip block centre grippings, and one of them grip block universal hinge in the second fixed plate, make the angular adjustment that can do the adaptability between holder and the mounting when the atress, the result of use is better relatively, balanced rope is held between the fixed slot on second fixed plate and pressure strip and between the restriction groove simultaneously, can be when balanced rope atress, the cell wall in restriction groove can be to the restriction of balanced rope, the probability that effectual increase balanced rope fixed relatively piece breaks away from.

Optionally, the cross section of the limiting groove is triangular or isosceles trapezoid and the limiting groove is open at the large end.

Through adopting above-mentioned technical scheme, when using, because the cross section of restriction groove is triangle-shaped or isosceles trapezoid, balanced rope can have the trend that the direction of keeping away from first fixed plate slided towards two restriction grooves when the atress, can further press from both sides tight balanced rope this moment to optimize the stability that balanced rope was held.

Optionally, a plurality of restriction arris grooves have all been seted up to the inner wall of restriction groove and grip block.

Through adopting above-mentioned technical scheme, restriction arris groove can further optimize the stability that balanced rope was by the centre gripping.

Optionally, an opening of the restriction groove communicated with one of the fixing grooves is larger than an opening of the restriction groove communicated with the other fixing groove, an end of the balance rope is clamped in the fixing groove communicated with the opening of the large end of the restriction groove, the opening of the restriction groove communicated with one of the fixing grooves is larger than the opening of the restriction groove communicated with the other fixing groove, and the end of the balance rope is clamped in the fixing groove communicated with the opening of the large end of the restriction groove.

Through adopting above-mentioned technical scheme, when balanced rope atress, have along fixed slot, restriction groove and another fixed slot shrink and break away from the trend of mounting, when balanced rope shrink this moment, the passageway of the balanced rope of centre gripping that forms between two restriction grooves can dwindle gradually to can further press from both sides tight balanced rope.

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

1. when using, only need to grasp the strand through stretch-draw anchor clamps, then drive the hoist engine shrink and stimulate first stay cord to the pulling strand moves towards hoist engine one side and to adjust the degree of hanging down that the strand needs the adjustment position, simultaneously because the weight of the strand on the suspension bridge is great relatively, can effectively optimize the hoist engine through the tensile strand of first stay cord through the reaction frame when, the stability of hoist engine itself, simultaneously can effectual optimization adjustment strand degree of hanging down's convenience.

Drawings

FIG. 1 is a schematic view of an installation structure of an embodiment of the present application;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

FIG. 3 is a schematic structural diagram of a reaction frame according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of an embodiment of the present application;

fig. 5 is an exploded view of a tensioning clamp according to an embodiment of the present application.

Description of reference numerals: 1. a tower top portal; 2. a winch; 3. a first draw cord; 31. a guide wheel; 32. a first fixing plate; 4. a cable strand; 41. a balancing rope; 5. tensioning the clamp; 51. a fixing member; 511. a compression plate; 512. a second fixing plate; 513. fixing grooves; 514. a limiting groove; 515. a limiting edge groove; 52. a clamping member; 521. a clamping plate; 6. a reaction frame; 61. a mounting seat; 62. a frame body; 63. a jack; 64. and (6) pre-burying a steel plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a mid-span sag adjustment retraction system for a strand.

Referring to fig. 1 and 2, the tower crane comprises a winch 2 arranged at the top of a tower top gantry 1, a first pulling rope 3 connected to the pulling end of the winch 2, and a tensioning clamp 5 clamped on a rope strand 4. The stretching end of the winding machine 2 is a winding drum thereof, and the first pulling rope 3 is partially or completely wound on the winding drum of the winding machine 2.

One end of the first pulling rope 3, which is far away from the winch 2, is connected to the tensioning clamp 5, the top of the tower top gantry 1 is fixedly connected with a reaction frame 6 used for stabilizing the stress of the winch 2, and the winch 2 is installed on the reaction frame 6.

When using, only need to grasp 4 cable strands through stretch-draw anchor clamps 5, then drive 2 shrink of hoist engine and pulling first stay cord 3, move towards 2 one side of hoist engine with 4 cable strands of pulling and can adjust the degree of sag that 4 cable strands need the adjusting position, simultaneously because the weight of 4 cable strands of suspension bridge is great relatively, can effectively optimize 2 hoist engine when stretching 4 cable strands through 3 first stay cords through

reaction frame

6, 2 stability of hoist engine itself, simultaneously can effectual optimization adjustment 4 cable strand's of sag convenience.

Referring to fig. 1 and 2, the two tensioning clamps 5 are provided to clamp the strands 4, the two strands 4 are connected to a balance rope 41 for balancing stress, and a guide wheel 31 is provided at an end of the first pulling rope 3 away from the winding machine 2. The guide wheel 31 is a sheave and the balance rope 41 is sleeved in the sheave of the guide wheel 31. When the first pull rope 3 is contracted, the position of the guide wheel 31 relative to the balance rope 41 can be adjusted by driving the guide wheel 31 to rotate through the balance rope 41 or sliding along the wheel groove of the guide wheel 31; simultaneously, the cable strand 4 is pulled through the two tensioning clamps 5, the effect of pulling the cable strand 4 can be effectively optimized, and the possibility that the position adjustment amplitude is insufficient due to the bending of the cable strand 4 is reduced.

One end of the first pulling rope 3, which is far away from the winch 2, is fixedly connected with a first fixing plate 32, the first fixing plate 32 is of a channel steel-shaped structure, the guide wheel 31 is rotatably connected to the inner side of the first fixing plate 32, and the balance rope 41 penetrates through a gap between the first fixing plate 32 and the guide wheel 31. In use, the balance cord 41 can be restrained by the first fixing plate 32, and the effect of the position of the guide wheel 31 relative to the balance cord 41 can be optimized by rotating the guide wheel 31 relative to the first fixing plate 32.

Referring to fig. 2 and 3, the reaction frame 6 includes a mounting base 61 fixed to the tower top gantry 1, a frame body 62 fixedly coupled to the top of the mounting base 61, and a jack 63 fixed to the frame body 62. Jack 63 is the level setting, and hoist engine 2 installs in mount pad 61 and the flexible end of jack 63 supports the base of locating hoist engine 2, and strand 4 extends from hoist engine 2 towards the direction of jack 63. Wherein, the mount pad 61 is connected to the top of the tower portal 1 through the embedded steel bar that is embedded in the top of the tower portal 1.

The bottom fixedly connected with of mount pad 61 has a plurality of pre-buried steel sheets 64, and pre-buried steel sheet 64 predetermines in top of the tower portal 1 to be used for strengthening the joint strength between reaction frame 6 and the top of the tower portal 1.

When using, jack 63 supports the base of hoist engine 2, can be so that hoist engine 2 when stretching tensioning anchor clamps 5 through first stay cord 3, the power that hoist engine 2 received can transmit to support body 62 through jack 63, transmits to mount pad 61 again to make when using, the load that hoist engine 2 bore can effectual transmission to top of the tower portal 1, reduces the shearing force that connecting portion between mount pad 61 and the top of the tower portal 1 received, in order to optimize the result of use.

Referring to fig. 4 and 5, the tension clamp 5 includes a fixing member 51 connecting the balance cord and a clamping member 52 clamping the strand 4, the fixing member 51 includes a pressing plate 511 and a second fixing plate 512, and the pressing plate 511 and the second fixing plate 512 are parallel to each other and connected by a plurality of bolts. The second fixing plate 512 is provided with two fixing grooves 513 with mutually parallel extending directions and a limiting groove 514 communicating the two fixing grooves 513 on one side of the pressing plate 511, the pressing plate 511 is also provided with two fixing grooves 513 with mutually parallel extending directions and a limiting groove 514 communicating the two fixing grooves 513 on the outer wall of one side of the second fixing plate 512, and the two fixing grooves 513 and the limiting groove 514 on the second fixing plate 512 correspond to the two fixing grooves 513 and the limiting groove 514 on the pressing plate 511 respectively.

The ends of the balance string 41 are clamped between the fixing grooves 513 and the restricting grooves 514 of the second fixing plate 512 and the pressing plate 511. The clamping member 52 includes two clamping plates 521 having an arc-shaped plate structure, and the two clamping plates 521 are disposed on the same central axis. One of the clamping plates 521 is universally hinged to the second fixing plate 512, the strand 4 is clamped between the two clamping plates 521, and the two clamping plates 521 are fastened by bolts to clamp the strand 4.

When the balance rope 41 is stressed, the groove wall of the limiting groove 514 can limit the balance rope 41, and the probability that the balance rope 41 is separated from the fixing piece 51 is effectively increased.

Referring to fig. 4 and 5, the cross section of the limiting groove 514 is triangular or isosceles trapezoid and is open at the large end, a plurality of limiting edge grooves 515 are formed in the inner walls of the limiting groove 514 and the clamping plate 521, and the limiting edge grooves 515 in the limiting groove 514 are formed in the side wall of the limiting groove 514 facing the end opening side of the fixing groove 513. In use, since the cross section of the limiting groove 514 is triangular or isosceles trapezoid, the balance cord 41 will tend to slide towards the direction of the two limiting grooves 514 away from the first fixing plate 32 when being stressed, and at this time, the balance cord 41 will be further clamped, so as to optimize the stability of the clamping of the balance cord 41, and meanwhile, the limiting rib groove 515 can further optimize the stability of the clamping of the balance cord 41.

The opening of the limiting groove 514 communicated with one fixing groove 513 is larger than the opening of the limiting groove 514 communicated with the other fixing groove 513, the end part of the balancing rope 41 is clamped in the fixing groove 513 communicated with the opening of the large end of the limiting groove 514, so that when the balancing rope 41 is stressed, the balancing rope 41 tends to shrink along the fixing groove 513, the limiting groove 514 and the other fixing groove 513 and is separated from the fixing piece 51, and at the moment, when the balancing rope 41 shrinks, a channel formed between the two limiting grooves 514 and used for clamping the balancing rope 41 is gradually reduced, so that the balancing rope 41 can be further clamped.

The implementation principle of the strand mid-span sag adjustment retraction system in the embodiment of the application is as follows: when using, only need to grasp strand 4 through tensioning anchor clamps 5, then drive 2 shrink of hoist engine and pulling first stay cord 3, when first stay cord 3 shrinks, can drive guide pulley 31 through balanced rope 41 and rotate or slide along the race of guide pulley 31 and adjust the position of the relative balanced rope 41 of guide pulley 31, move towards hoist engine 2 with two tensioning anchor clamps 5 of 41 pulling through balanced rope, thereby can pull strand 4 and move towards hoist engine 2 one side, with the sag that adjustment strand 4 needs the adjusting position, simultaneously because strand 4's on the suspension bridge weight is great relatively, when can effectively optimize hoist engine 2 through first stay cord 3 tensile strand 4 through reaction frame 6, the stability of hoist engine 2 itself.

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

1. A mid-span sag adjustment retraction system for a strand is characterized in that: including setting up in hoist engine (2) at top of the tower portal (1) top, connecting in first stay cord (3) and the centre gripping in stretch-draw anchor clamps (5) of strand (4) of hoist engine (2) tensile end, the one end that hoist engine (2) were kept away from in first stay cord (3) is connected in stretch-draw anchor clamps (5), and the top of the tower portal (1) is fixed with reaction frame (6) that are used for stabilizing hoist engine (2) atress, install in reaction frame (6) hoist engine (2).

2. The strand mid-span sag adjustment retraction system according to claim 1, wherein: the tensioning clamp (5) is provided with two tensioning clamps which are clamped on the cable strands (4), the cable strands (4) are connected with balance ropes (41) used for balancing stress, one end, away from the winch (2), of the first pull rope (3) is provided with a guide wheel (31), and the guide wheel (31) is sleeved with the balance ropes (41).

3. The strand mid-span sag adjustment retraction system according to claim 2, wherein: one end, far away from the winch (2), of the first pulling rope (3) is fixedly connected with a first fixing plate (32), the first fixing plate (32) is of a channel steel-shaped structure, and the guide wheel (31) is rotatably connected to the inner side of the first fixing plate (32).

4. The strand mid-span sag adjustment retraction system according to claim 1, wherein: the reaction frame (6) comprises a mounting seat (61) fixed on the top of the tower portal frame (1), a frame body (62) fixed on the top of the mounting seat (61) and a jack (63) fixed on the frame body (62), the winch (2) is mounted on the mounting seat (61), the cable strand (4) extends from the winch (2) towards the jack (63), and the jack (63) abuts against the base of the winch (2).

5. The strand mid-span sag adjustment retraction system according to claim 2, wherein: the tensioning clamp (5) comprises a fixing piece (51) and a clamping piece (52), the fixing piece (51) comprises a pressing plate (511) and a second fixing plate (512) which are fastened to each other through bolts, two fixing grooves (513) and limiting grooves (514) communicated with the two fixing grooves (513) are formed in opposite sides of the second fixing plate (512) and the pressing plate (511), the balance rope (41) is clamped between the fixing grooves (513) on the second fixing plate (512) and the pressing plate (511) and between the limiting grooves (514), the clamping piece (52) comprises two clamping plates (521) which are of arc-shaped plate-shaped structures, one of the clamping plates (521) is universally hinged to the second fixing plate (512), and the cable strand (4) is clamped between the two clamping plates (521) and fastened by the bolts.

6. The strand mid-span sag adjustment retraction system according to claim 5, wherein: the cross section of the limiting groove (514) is triangular or isosceles trapezoid and the limiting groove is open at a large end.

7. The strand mid-span sag adjustment retraction system according to claim 6, wherein: a plurality of limit arris grooves (515) are respectively arranged on the inner walls of the limit groove (514) and the clamping plate (521).

8. The strand mid-span sag adjustment retraction system according to claim 7, wherein: the opening of the limiting groove (514) communicated with one fixing groove (513) is larger than the opening of the limiting groove (514) communicated with the other fixing groove (513), and the end part of the balancing rope (41) is clamped in the fixing groove (513) communicated with the large end opening of the limiting groove (514).