CN115117788A

CN115117788A - Ratchet turn-buckle is used in electric wire installation

Info

Publication number: CN115117788A
Application number: CN202211037247.1A
Authority: CN
Inventors: 余延武
Original assignee: Jiangsu Hengan Electric Power Tool Co ltd
Current assignee: Jiangsu Hengan Electric Power Tool Co ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-09-27
Anticipated expiration: 2042-08-29
Also published as: CN115117788B

Abstract

The invention relates to the technical field of equipment for wire installation and discloses a ratchet wire tightener for wire installation, which comprises a fixed frame, a connecting buckle and a tension meter, wherein a winding roller is movably sleeved in the fixed frame, a steel wire rope is wound on the winding roller and positioned in the fixed frame, and one end of the steel wire rope is fixedly connected with the winding roller. Through the setting of the spacing combination of ratchet, make when the tractive to the electric wire, because the ratchet latch interval is too big, can't guarantee after the electric wire reaches required pulling force again, the pawl can't carry out spacing when stopping to the ratchet, through second ratchet and pawl III, the cooperation of third ratchet and pawl gear, adjust the position at I place of pawl, but with this to the fixed disk the angle of rotation adjust, ensure that the wind-up roll satisfies the pulling force needs to the electric wire to wire rope's rolling, and then accurate completion is to the tractive of electric wire, improve the tensile accurate value of electric wire tractive, it is not enough to avoid the electric wire pulling force to appear when the installation.

Description

Ratchet turn-buckle is used in electric wire installation

Technical Field

The invention relates to the technical field of equipment for installing electric wires, in particular to a ratchet wheel wire tightener for installing electric wires.

Background

A wire tightener, also called ratchet tightener, is used for tightening electric wires in overhead line laying construction, when in use, a steel wire rope on the wire tightener is firstly loosened and fixed on a cross arm, the electric wires are clamped by a wire clamping clamp, then a special spanner is pulled, the steel wire rope is gradually wound on a ratchet wheel roller due to the anti-reversion effect of a pawl to tighten the wires, the tightened wires are fixed on an insulator, then the pawl is firstly loosened to loosen the steel wire rope or galvanized iron wires, then wire clamping pliers are loosened, and finally the steel wire rope or galvanized iron wires are wound on the roller of the ratchet wheel to complete the wire tightening effect, but the wire tightener used at present has some defects as follows:

the existing tensioner limits a roller through a ratchet wheel and a pawl to prevent reversion, but a certain gap exists between adjacent clamping teeth on the ratchet wheel, when a steel wire rope is wound by a roller wheel and an electric wire has certain tension, the tension does not reach the required tension at the moment, but the ratchet wheel is limited by the tension of the electric wire, the next clamping tooth cannot be in contact with the pawl and is limited and clamped by the pawl, so that the tension of the electric wire is small, and the effective tension cannot be reached.

Meanwhile, when the wire is drawn, the clamping position of the wire by the wire clamp cannot be accurately clamped, so that the drawing of the stay wire is not finished after the steel wire rope is wound, at the moment, the wire needs to be loosened and clamped again, and useless work is easily formed during drawing, so that the working efficiency is influenced.

Disclosure of Invention

The invention provides a ratchet wire tightener for wire installation, which has the advantages of high drawing precision and high working efficiency and solves the problems in the background technology.

The invention provides the following technical scheme: a ratchet tightener for installing electric wire is composed of a fixed frame with a winding roller, a connecting fastener and a tension meter, a steel wire rope is wound on the wind-up roll and positioned in the fixed frame, one end of the steel wire rope is fixedly connected with the wind-up roll, the other end of the steel wire rope is fixedly connected with a suspension clasp, two sides of the fixed frame are symmetrically and fixedly provided with a supporting plate, the supporting plate positioned on the right side of the fixed frame is movably provided with a movable locking device, the supporting plate positioned on the left side of the fixed frame is fixedly provided with a fixed locking device, the front end of the wind-up roll is fixedly provided with a ratchet wheel limit combination which is fixedly connected with the fixed frame, the rear end of the winding roller is fixedly sleeved with a ratchet wrench, the connecting buckle is buckled with the left part of the fixed locking device, and the tension meter is installed on the steel wire rope.

Preferably, the ratchet limiting combination comprises a fixed disc, the fixed disc is fixedly sleeved with a winding roller, a first ratchet is fixedly arranged on the inner side of the fixed disc, a movable supporting disc I is sleeved on the winding roller and located in the inner portion of the fixed disc, a pawl I is movably arranged in the top inner cavity of the movable supporting disc I through a movable shaft, the top of the pawl I is movably clamped with the first ratchet, a second ratchet is fixedly arranged on the inner side of the movable supporting disc I, a movable supporting disc II is sleeved on the winding roller and located in the inner portion of the movable supporting disc I, a pawl III is movably arranged in the top inner cavity of the movable supporting disc II through a shaft, the top end of the pawl III is movably clamped with the second ratchet, supporting springs are fixedly arranged on the left sides of the pawl I and the pawl III, and a third ratchet is fixedly arranged on the inner side of the movable supporting disc II, the winding roller is provided with a pawl gear in a sleeved mode, the pawl gear is movably connected with a third ratchet wheel in a clamped mode, a movable sleeve is fixedly connected to the front of the pawl gear, the movable sleeve is movably sleeved with the winding roller, a limiting sleeve is movably sleeved on the movable sleeve, a connecting plate is evenly and fixedly connected to the side face of the limiting sleeve, and the outer end of the connecting plate is fixedly connected with the front of the fixing frame.

Preferably, the number of teeth of the first ratchet wheel, the second ratchet wheel and the third ratchet wheel is increased in sequence, and the diameter of the teeth of the first ratchet wheel, the second ratchet wheel and the third ratchet wheel is decreased in sequence, so that the adjacent tooth spaces of the first ratchet wheel, the second ratchet wheel and the third ratchet wheel are decreased in sequence.

Preferably, the specification of activity locking device and fixed locking device is the same, activity locking device is including fixed case, fixed case and backup pad activity joint, there is spacing cutting ferrule at the top of fixed case through axisymmetric movable mounting, the locking cutting ferrule has been cup jointed in the inside activity of spacing cutting ferrule, the left side fixed mounting of fixed case has the go-between, suspension clasp and go-between lock joint, the locking cutting ferrule comprises two parts in front and back, the top of two parts is articulated around the locking cutting ferrule forms, the whole toper that is of locking cutting ferrule, the double-layered line hole has been seted up to the inside of locking cutting ferrule, the bell mouth has been seted up to the inside of spacing cutting ferrule, the locking cutting ferrule cup joints with the bell mouth activity.

Preferably, a sliding plate is movably clamped on the upper surface of the fixed box, a clamping plate is movably mounted on the upper surface of the sliding plate, locking bolts I are symmetrically sleeved on the clamping plate in a threaded manner, and the locking bolts I penetrate through the clamping plate and are in threaded connection with the sliding plate.

Preferably, the bottoms of the two limiting clamping sleeves are respectively and movably provided with a movable plate through a shaft, a locking bolt II is in threaded connection between the movable plates, and the left ends of the movable plates are movably connected with the fixed box through fixed shafts.

The invention has the following beneficial effects:

1. through the setting of the spacing combination of ratchet, make when the tractive to the electric wire, because the ratchet latch interval is too big, can't guarantee after the electric wire reaches required pulling force again, the pawl can't carry out spacing when stopping to the ratchet, through second ratchet and pawl III, the cooperation of third ratchet and pawl gear, adjust the position at I place of pawl, but with this to the fixed disk the angle of rotation adjusts, ensure that the wind-up roll satisfies the pulling force needs to the electric wire to wire rope's rolling, and then accurate completion is to the tractive of electric wire, improve the tensile accurate value of electric wire tractive, it is not enough to avoid the electric wire to appear the pulling force when the installation, lead to the electric wire in the use, break down.

2. Through activity locking device and fixed locking device's setting, make and carry out dual locking to the electric wire through activity locking device, improve the locking degree of electric wire, avoid droing at the tractive in-process, and simultaneously, after wire rope is whole by the rolling, because the position to the electric wire clamping appears the deviation, then the electric wire does not reach when required pulling force, still need carry out one step of tractive, then this moment, remove the clamping action of gliding board and clamp plate to the electric wire, fix the tail end and the fixed locking device of electric wire, make the locking cutting ferrule remove left earlier afterwards, break away from with spacing cutting ferrule, remove spacing to the electric wire, make activity locking device pull out wire rope afterwards, carry out the tractive once more after fixing the middle part to the electric wire, make the electric wire reach required pulling force value, avoid repetition to carry out the tractive to the electric wire, improve the installation effectiveness of electric wire.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic top view of the structure of the present invention;

FIG. 3 is a partial cross-sectional view of the ratchet limiting assembly of the present invention;

FIG. 4 is a front view of a half-section view of the ratchet limiting assembly of the present invention;

FIG. 5 is a schematic view of the third ratchet and pawl gear installation configuration of the present invention;

FIG. 6 is a partial cross-sectional view of the structural movable locking device of the present invention;

FIG. 7 is a schematic view of the installation of the structure limiting clamp sleeve and the movable plate of the present invention;

fig. 8 is a schematic view of a structural locking ferrule of the present invention.

In the figure: 1. a fixed mount; 2. a wind-up roll; 3. a wire rope; 4. hanging buckles; 5. a support plate; 6. a movable locking device; 7. fixing the locking device; 8. a ratchet wheel limiting combination; 9. a connecting buckle; 10. an electric wire; 11. fixing the disc; 12. a first ratchet wheel; 13. a movable support plate I; 14. a pawl I; 15. a second ratchet wheel; 16. a movable support plate II; 17. a pawl III; 18. a third ratchet wheel; 19. a pawl gear; 20. a movable sleeve; 21. a limiting sleeve; 22. a connecting plate; 23. a fixed box; 24. a limiting clamping sleeve; 25. locking the clamping sleeve; 26. a slide plate; 27. a clamping plate; 28. locking a bolt I; 29. a movable plate; 30. locking a bolt II; 31. a connecting ring; 32. a ratchet wrench.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1-5, a ratchet tightener for electric wire installation comprises a fixed frame 1, a connecting buckle 9 and a tension meter, wherein a wind-up roll 2 is movably sleeved in the fixed frame 1, a steel wire rope 3 is wound on the wind-up roll 2 and positioned in the fixed frame 1, one end of the steel wire rope 3 is fixedly connected with the wind-up roll 2, a suspension buckle 4 is fixedly connected with the other end of the steel wire rope 3, support plates 5 are symmetrically and fixedly installed on two sides of the fixed frame 1, a movable locking device 6 is movably installed on the support plate 5 positioned on the right side of the fixed frame 1, a fixed locking device 7 is fixedly installed on the support plate 5 positioned on the left side of the fixed frame 1, a ratchet limiting combination 8 is fixedly installed at the front end of the wind-up roll 2, the ratchet limiting combination 8 is fixedly connected with the fixed frame 1, a ratchet wrench 32 is fixedly sleeved on the rear end of the wind-up roll 2, and the connecting buckle 9 is fastened with the left part of the fixed locking device 7, the tension meter is arranged on the steel wire rope 3; the ratchet wheel limiting combination 8 comprises a fixed disc 11, the fixed disc 11 is fixedly sleeved with a winding roller 2, a first ratchet wheel 12 is fixedly installed on the inner side of the fixed disc 11, a movable supporting disc I13 is movably sleeved on the winding roller 2 and located inside the fixed disc 11, a pawl I14 is movably installed in the inner cavity of the top of the movable supporting disc I13 through a movable shaft, the top of the pawl I14 is movably clamped with the first ratchet wheel 12, a second ratchet wheel 15 is fixedly installed on the inner side of the movable supporting disc I13, a movable supporting disc II 16 is movably sleeved on the winding roller 2 and located inside the movable supporting disc I13, a pawl III 17 is movably installed in the inner cavity of the top of the movable supporting disc II 16 through a shaft, the top end of the pawl III 17 is movably clamped with the second ratchet wheel 15, supporting springs are fixedly installed on the left sides of the pawl I14 and the pawl III 17, and a third ratchet wheel 18 is fixedly installed on the inner side of the movable supporting disc II 16, a pawl gear 19 is movably sleeved in the winding roller 2 and positioned in a movable supporting plate II 16, the pawl gear 19 is movably clamped with a third ratchet wheel 18, a movable sleeve 20 is fixedly connected to the front of the pawl gear 19, the movable sleeve 20 is movably sleeved with the winding roller 2, a limiting sleeve 21 is movably sleeved on the movable sleeve 20, a connecting plate 22 is uniformly and fixedly connected to the side surface of the limiting sleeve 21, the outer end of the connecting plate 22 is fixedly connected with the front of the fixed frame 1, the tail end of the wire is fixed by a wire clamp, then the wire rope 3 is pulled out by the suspension buckle 4, the suspension buckle 4 is buckled with the wire clamp, then the winding roller 2 is rotated by a ratchet wrench 32 to wind the wire rope 3, when the wire rope 3 is wound to a certain extent and the wire is under certain tension, the winding roller 2 cannot drive the next tooth on the first ratchet wheel 12 to cross the pawl I14 by the fixed disc 11, and further reach the required electric wire pulling force value, then, at this moment, drive the movable support disc I13 to rotate through the pawl I14, make it rotate certain angle, and remove the pawl III 17 to the second ratchet 15 restriction, and then make the pawl III 17 pass the next latch on the second ratchet 15, and then adjust the position that the pawl I14 limited to the first ratchet 12, make the pawl I14 rotate with the first ratchet 12 synchronously, stop after reaching the required pulling force position of the electric wire, if the next latch of the second ratchet 15 passes the pawl III 17, when there is certain distance to the required position of the electric wire still, the same thing, synchronous adjustment pawl III 17 and movable support disc I13 position, at this moment pull out the pawl gear 19 through the movable sleeve 20, rotate the third ratchet 18 by the angle of a latch, then limit the pawl gear 19 and third ratchet 18, so as to adjust the rotatable angle of the fixed disc 11, the winding roller 2 is ensured to wind the steel wire rope 3 to meet the tension requirement of the electric wire, so that the electric wire is accurately drawn, the precision of electric wire drawing is improved, and the problems that the electric wire is not enough in tension when being installed, so that the electric wire is easy to swing greatly when being blown by wind, such as the tension is reduced and the tension of the electric wire is insufficient in the use process, are avoided; the tooth numbers of the first ratchet wheel 12, the second ratchet wheel 15 and the third ratchet wheel 18 are sequentially increased, and the diameters of the first ratchet wheel 12, the second ratchet wheel 15 and the third ratchet wheel 18 are sequentially reduced, so that the adjacent tooth spaces of the first ratchet wheel 12, the second ratchet wheel 15 and the third ratchet wheel 18 are sequentially reduced, the limiting position of the pawl I14 on the first ratchet wheel 12 is gradually adjusted, the tension difference of the electric wire 10 is further reduced, and the installation requirement of the electric wire 10 is met;

example two

Referring to fig. 6-8, the specifications of the movable locking device 6 and the fixed locking device 7 are the same, the movable locking device 6 includes a fixed box 23, the fixed box 23 is movably clamped with the support plate 5, a position-limiting cutting sleeve 24 is movably mounted on the top of the fixed box 23 through axial symmetry, a locking cutting sleeve 25 is movably sleeved inside the position-limiting cutting sleeve 24, a connecting ring 31 is fixedly mounted on the left side of the fixed box 23, a suspension buckle 4 is fastened with the connecting ring 31, the locking cutting sleeve 25 is composed of a front part and a rear part, the front part and the rear part of the locking cutting sleeve 25 are hinged with each other, the locking cutting sleeve 25 is integrally conical, a wire clamping hole is formed inside the locking cutting sleeve 25, a conical hole is formed inside the position-limiting cutting sleeve 24, the locking cutting sleeve 25 is movably sleeved with the conical hole, the tail end of the electric wire 10 is inserted from the right end hole of the locking cutting sleeve 25, then the locking cutting sleeve 25 is inserted into the position-limiting cutting sleeve 24, the locking cutting sleeve 24 is limited by the conical hole of the position-limiting cutting sleeve 24, then, the suspension buckle 4 is buckled with the connecting ring 31, then the movable locking device 6 is pulled by using the steel wire rope 3, the movable locking device 6 pulls the electric wire 10 through the limiting of the limiting clamping sleeve 24 and the locking clamping sleeve 25, in the pulling process, the electric wire 10 forms opposite pulling force on the limiting clamping sleeve 24, but under the limiting of the conical hole of the locking clamping sleeve 25, the limiting clamping sleeve 24 is clamped more and more tightly, and the electric wire 10 is prevented from falling off from the limiting clamping sleeve 24; a sliding plate 26 is movably clamped on the upper surface of the fixed box 23, a clamping plate 27 is movably mounted on the upper surface of the sliding plate 26, locking bolts I28 are symmetrically sleeved on the clamping plate 27 in a threaded manner, the locking bolts I28 penetrate through the clamping plate 27 to be in threaded connection with the sliding plate 26, the tail end of the electric wire 10 penetrates through the locking clamping sleeve 25, the tail end of the electric wire 10 is bent for 180 degrees and then penetrates through a position between the sliding plate 26 and the clamping plate 27, then the sliding plate 26 and the clamping plate 27 are locked by the locking bolts I28, the electric wire 10 is locked again, double locking is carried out on the electric wire 10, when the electric wire 10 is pulled, the bent position of the electric wire 10 can also have the pressing effect on the locking clamping sleeve 25, the locking clamping sleeve 25 is pressed towards the limiting clamping sleeve 24, the locking degree of the limiting clamping sleeve 24 to the locking clamping sleeve 25 is enhanced, and the falling off of the electric wire 10 in the drawing process is avoided, so that the working efficiency is affected, even accidents are caused, meanwhile, after the steel wire rope 3 is completely rolled up, because the position for clamping the electric wire deviates, when the electric wire does not reach the required tension, one-step traction is needed, at the moment, the clamping effect of the sliding plate 26 and the clamping plate 27 on the electric wire is relieved, the tail end of the electric wire 10 is fixed with the fixed locking device 7, the fixing method is the same as that when the electric wire 10 is fixed on the movable locking device 6, after the fixing is finished, the locking clamping sleeve 25 moves leftwards firstly and is separated from the limiting clamping sleeve 24, the limiting on the electric wire 10 is relieved, then the movable locking device 6 pulls out the steel wire rope 3, the middle part of the electric wire 10 is fixed and then is subjected to traction again, the electric wire reaches the required tension value, the electric wire is prevented from being repeatedly pulled, and the installation efficiency of the electric wire is improved; the bottom of two spacing cutting ferrule 24 all has the fly leaf 29 through axle movable mounting, and threaded connection has locking bolt II 30 between two fly leaves 29, and the left end of fly leaf 29 is through fixed axle and fixed case 23 swing joint, adjusts two spacing cutting ferrule 24's bottom interval through fly leaf 29 and locking bolt II 30, and then adjusts the diameter size of the inside bell mouth of spacing cutting ferrule 24 to this improves the degree of clamp to locking cutting ferrule 25, increases the degree of clamp to electric wire 10.

The working principle is that a connecting buckle 9 is connected with an electric wire pile for installing an electric wire, the other end of the connecting buckle 9 is buckled with a connecting ring 31 on a fixed locking device 7, a steel wire rope 3 is pulled out through a movable locking device 6, the tail end of the electric wire 10 is inserted into a right end hole of a locking cutting sleeve 25, the locking cutting sleeve 25 is inserted into a limiting cutting sleeve 24, the locking cutting sleeve 25 is limited through a conical hole of the limiting cutting sleeve 24, the tail end of the electric wire 10 penetrates through the locking cutting sleeve 25, the tail end of the electric wire 10 is bent 180 degrees and then penetrates through a position between a sliding plate 26 and a clamping plate 27, the sliding plate 26 and the clamping plate 27 are locked through a locking bolt I28, then a winding roller 2 is rotated through a ratchet wrench 32 to wind the steel wire rope 3, when the steel wire rope 3 is wound to a certain degree and the electric wire is under certain tension, at the moment, the winding roller 2 cannot drive the next tooth on a first ratchet 12 to cross a pawl I14 through a fixed disc 11, and further reach the required electric wire pulling force value, then, at this moment, drive the movable support disc I13 to rotate through the pawl I14, make it rotate certain angle, and remove the pawl III 17 to the second ratchet 15 restriction, and then make the pawl III 17 pass the next latch on the second ratchet 15, and then adjust the position that the pawl I14 limited to the first ratchet 12, make the pawl I14 rotate with the first ratchet 12 synchronously, stop after reaching the required pulling force position of the electric wire, if the next latch of the second ratchet 15 passes the pawl III 17, when there is certain distance to the required position of the electric wire still, the same thing, synchronous adjustment pawl III 17 and movable support disc I13 position, at this moment pull out the pawl gear 19 through the movable sleeve 20, rotate the third ratchet 18 by the angle of a latch, then limit the pawl gear 19 and third ratchet 18, so as to adjust the rotatable angle of the fixed disc 11, when the tension value of the wire is adjusted by the ratchet limiting combination 8, the torsion force needs to be continuously applied to the wind-up roll 2 through the ratchet wrench 32;

after the steel wire rope 3 is completely wound, due to the fact that the position for clamping the electric wire deviates, when the electric wire does not reach the required tension, one-step traction is needed, at the moment, the contact sliding plate 26 and the clamping plate 27 clamp the electric wire, the tail end of the electric wire 10 is fixed with the fixed locking device 7, the fixing method is the same as that of the electric wire 10 when the electric wire 10 is fixed on the movable locking device 6, after the fixing is finished, the locking clamping sleeve 25 moves leftwards firstly and is separated from the limiting clamping sleeve 24, the limitation on the electric wire 10 is relieved, then the movable locking device 6 pulls out the steel wire rope 3, the middle of the electric wire 10 is fixed and then is subjected to traction again, and the electric wire reaches the required tension value and is installed.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a ratchet turn-buckle is used in electric wire installation, includes mount (1), connector link (9) and tensiometer, its characterized in that: the winding roll (2) is sleeved in the middle of the fixing frame (1), the steel wire rope (3) is wound on the winding roll (2) and is positioned in the fixing frame (1), one end of the steel wire rope (3) is fixedly connected with the winding roll (2), the other end of the steel wire rope (3) is fixedly connected with a suspension buckle (4), supporting plates (5) are symmetrically and fixedly arranged on two sides of the fixing frame (1), a movable locking device (6) is movably arranged on the supporting plate (5) on the right side of the fixing frame (1), a fixed locking device (7) is fixedly arranged on the supporting plate (5) on the left side of the fixing frame (1), a ratchet limiting combination (8) is fixedly arranged at the front end of the winding roll (2), the ratchet limiting combination (8) is fixedly connected with the fixing frame (1), and a ratchet wrench (32) is fixedly sleeved at the rear end of the winding roll (2), the connecting buckle (9) is buckled with the left part of the fixed locking device (7), and the tension meter is installed on the steel wire rope (3).

2. The ratchet turnbuckle for electric wire installation according to claim 1, wherein: the ratchet wheel limiting combination (8) comprises a fixed disc (11), the fixed disc (11) is fixedly sleeved with a winding roller (2), a first ratchet wheel (12) is fixedly installed on the inner side of the fixed disc (11), an movable supporting disc I (13) is sleeved on the winding roller (2) and located in the inner portion of the fixed disc (11), a pawl I (14) is movably installed in the inner cavity of the top of the movable supporting disc I (13) through a movable shaft, the top of the pawl I (14) is movably connected with the first ratchet wheel (12), a second ratchet wheel (15) is fixedly installed on the inner side of the movable supporting disc I (13), a movable supporting disc II (16) is sleeved on the winding roller (2) and located in the inner portion of the movable supporting disc I (13), a pawl III (17) is movably installed in the inner cavity of the top of the movable supporting disc II (16) through a shaft, and the top end of the pawl III (17) is movably connected with the second ratchet wheel (15), the equal fixed mounting in left side of pawl I (14) and pawl III (17) has supporting spring, the inboard fixed mounting of activity supporting disk II (16) has third ratchet (18), its inside activity that just is located activity supporting disk II (16) has cup jointed pawl gear (19) on wind-up roll (2), pawl gear (19) and third ratchet (18) activity joint, the preceding fixedly connected with movable sleeve (20) of pawl gear (19), movable sleeve (20) and wind-up roll (2) activity are cup jointed, stop collar (21) have been cup jointed in the activity on movable sleeve (20), the even fixedly connected with connecting plate (22) in side of stop collar (21), the outer end of connecting plate (22) and the preceding fixed connection of mount (1).

3. The ratchet turnbuckle for electric wire installation according to claim 2, wherein: the number of teeth of the first ratchet wheel (12), the second ratchet wheel (15) and the third ratchet wheel (18) is increased in sequence, and the diameter of the first ratchet wheel, the second ratchet wheel and the third ratchet wheel is decreased in sequence, so that the adjacent tooth spaces of the first ratchet wheel (12), the second ratchet wheel (15) and the third ratchet wheel (18) are decreased in sequence.

4. The ratchet turnbuckle for electric wire installation according to claim 1, wherein: the specifications of the movable locking device (6) and the fixed locking device (7) are the same, the movable locking device (6) comprises a fixed box (23), the fixed box (23) is movably clamped with the supporting plate (5), the top of the fixed box (23) is provided with a limit cutting sleeve (24) through axial symmetry, a locking cutting sleeve (25) is movably sleeved in the limiting cutting sleeve (24), a connecting ring (31) is fixedly arranged at the left side of the fixed box (23), the hanging buckle (4) is buckled with the connecting ring (31), the locking cutting sleeve (25) consists of a front part and a rear part, the upper parts of the front part and the rear part of the locking cutting sleeve (25) are hinged, the locking cutting sleeve (25) is integrally conical, the wire clamping hole is formed in the locking clamping sleeve (25), the conical hole is formed in the limiting clamping sleeve (24), and the locking clamping sleeve (25) is movably sleeved with the conical hole.

5. The ratchet turnbuckle for electric wire installation according to claim 4, wherein: the upper surface activity joint of fixed case (23) has slide board (26), the upper surface movable mounting of slide board (26) has clamping plate (27), symmetrical screw thread cover has locking bolt I (28) on clamping plate (27), locking bolt I (28) pass clamping plate (27) and slide board (26) threaded connection.

6. The ratchet turnbuckle for electric wire installation according to claim 4, wherein: the bottom of each of the two limiting clamping sleeves (24) is movably provided with a movable plate (29) through a shaft, a locking bolt II (30) is connected between the movable plates (29) in a threaded mode, and the left end of each movable plate (29) is movably connected with the fixed box (23) through a fixed shaft.