CN111908247A

CN111908247A - Power cable pay-off device and use method thereof

Info

Publication number: CN111908247A
Application number: CN202010890761.4A
Authority: CN
Inventors: 侯林
Original assignee: Sichuan Ziyuan Construction Engineering Co ltd
Current assignee: Sichuan Ziyuan Construction Engineering Co ltd
Priority date: 2020-08-29
Filing date: 2020-08-29
Publication date: 2020-11-10

Abstract

The utility model relates to an electric power cable pay-off device and a use method thereof, relating to the technical field of electric power engineering, comprising a frame and a base, wherein two groups of mutually matched conveying devices are arranged on the base, an adjusting mechanism for adjusting the two groups of conveying devices to get close to or away from each other is arranged on the base, the conveying device comprises an installation frame, two rotating wheels and an annular crawler belt, the rotating shaft of the rotating wheels is rotationally connected in the installation frame, the annular crawler belt is sleeved outside the two rotating wheels, the rotating wheels comprise a first wheel and two second wheels, the first wheel is fixed on the rotating shaft of the rotating wheels, the two second wheels are connected on the rotating shaft of the rotating wheels in a sliding way, the first wheel is positioned between the two second wheels, and the radius of one end of the second wheels, which is far away from the; the elastic piece is used for pressing the end part of the second wheel against the end part of the first wheel. The contact area between the annular crawler and the cable is increased, so that the friction force between the annular crawler and the cable is increased, and the cable traction effect of the cable conveyor on the cable is improved.

Description

Power cable pay-off device and use method thereof

Technical Field

The application relates to the technical field of electric power engineering, in particular to a power cable pay-off device and a using method thereof.

Background

Along with the continuous improvement of the social living standard, the scale of the urban power grid is also continuously enlarged, and the traditional manual cabling mode cannot meet the requirements. In order to reduce the labor intensity of laying cables and ensure the construction quality, various hoists for placing cable drums and cable conveyors for drawing cables are developed at home at present.

At present, most of cable conveyors adopt crawler belts, and the opening and closing of the crawler belts are realized by adopting hand-operated double-head screw rods until cables are clamped. But the track is line contact with the outer surface of cable, and cable conveyer is less to the frictional force of cable, when actual laying cable, leads to cable conveyer to the traction effect of cable not good.

Disclosure of Invention

In order to improve the traction effect of a cable conveyor on a cable, the application provides an electric cable pay-off device and a using method thereof.

In a first aspect, the present application provides an electric power cable pay-off device, which adopts the following technical scheme:

an electric cable pay-off device comprises a rack and a base, wherein two groups of conveying devices which are matched with each other are arranged on the base, an adjusting mechanism for adjusting the two groups of conveying devices to be close to or away from each other is arranged on the base, each conveying device comprises an installation frame, two rotating wheels and an annular crawler, rotating shafts of the rotating wheels are rotatably connected in the installation frame, the annular crawler is sleeved outside the two rotating wheels, the rotating wheels comprise a first wheel and two second wheels, the first wheel is fixed on the rotating shafts of the rotating wheels, the two second wheels are connected on the rotating shafts of the rotating wheels in a sliding manner, the first wheel is positioned between the two second wheels, and the radius of one end, away from the first wheel, of each second wheel is larger than that of the first wheel; the elastic piece is used for pressing the end part of the second wheel against the end part of the first wheel.

Through adopting above-mentioned technical scheme, place the one end of cable between two sets of conveyor, adjustment mechanism orders about two sets of conveyor and draws close each other for the working face of the endless track on two sets of conveyor grasps the cable. Meanwhile, the cable is pressed against the two second wheels and is respectively far away from the first wheels, and because the radius of one end of each second wheel far away from the first wheel is larger than that of the first wheel, the second wheels extrude the edge of the annular crawler belt by combining with the elastic piece, so that the shape of the cross section of the annular crawler belt is changed, and the working surface of the annular crawler belt is wrapped on the circumferential surface of the cable; the contact area between the annular crawler and the cable can be increased, so that the friction force between the annular crawler and the cable is increased, and the traction effect of the cable conveyor on the cable is improved. In addition, the cross section of the annular crawler belt is in a groove shape, the cable can be effectively prevented from moving in all directions up and down and left and right, and the guide limiting effect on the cable is achieved.

Optionally, the elastic member includes a rubber sleeve, the rubber sleeve is sleeved outside the first wheel, two ends of the rubber sleeve are respectively fixed to the two second wheels, and when the rubber sleeve is in a natural state, the end of each second wheel abuts against the end of the first wheel.

By adopting the technical scheme, the rubber sleeve applies acting force towards the first wheel to the second wheel, and the cable extrudes the working surface of the annular crawler belt and enables the second wheel to be far away from the first wheel; because the radius of the end of the second wheel far away from the first wheel is larger than that of the first wheel, the working surface of the annular crawler belt is wrapped on the circumferential surface of the cable. Meanwhile, the rubber sleeve is flexible, so that the working surface of the annular crawler belt can be better wrapped on the circumferential surface of the cable, and the cable traction effect of the cable conveyor on the cable is further improved.

Optionally, the elastic component includes two extension springs, first holding tank has all been seted up at the both ends of first round, the second holding tank has been seted up towards the one end of first round to the second round, extension spring's both ends are fixed in the cell wall of first holding tank and second holding tank respectively, work as when extension spring is under the natural state, the tip of second round is supported and is pressed in the tip of first round.

By adopting the technical scheme, the tension spring applies acting force towards the first wheel to the second wheel, the cable extrudes the working surface of the annular crawler belt, and the second wheel is far away from the first wheel; because the radius of one end of the second wheel far away from the first wheel is larger than that of the first wheel, the working surface of the annular crawler belt is wrapped on the circumferential surface of the cable, and the structure is simpler.

Optionally, the end of the first wheel is provided with a limiting part, and the end of the second wheel is provided with a limiting groove in plug-in fit with the limiting part.

Through adopting above-mentioned technical scheme, spacing portion cooperatees with the spacing groove for the second wheel rotates along with first round, makes first round and second round better drive the annular track and rotate.

Optionally, the limiting part is sheet-shaped, and the limiting part is located at the edge of the first wheel.

Through adopting above-mentioned technical scheme, flaky spacing portion can support the annular track, avoids the edge of annular track to slide into between first wheel and the second wheel a bit for the annular track better treats that the traction cable carries.

Optionally, the base is provided with two groups of support frames, the two groups of support frames are respectively located at the wire inlet end and the wire outlet end of the conveying device, and the support frames are rotatably connected with support wheels for supporting the cables.

Through adopting above-mentioned technical scheme, the both ends of supporting wheel pair cable are supported for the cable is better pulls between two sets of conveyor.

Optionally, a vertical sliding groove is formed in the support frame, a sliding block is connected in the sliding groove in a sliding manner, and a rotating shaft of the support wheel is rotatably connected to the sliding block; the mounting frame is fixed with the connecting rod, the tip of connecting rod is fixed with the slope piece, the bottom of slider slides and connects in the inclined plane of slope piece, just the inclined plane of slope piece is 45 angles with two sets of conveyor's moving direction.

By adopting the technical scheme, the two groups of conveying devices are close to or far away from each other, and the two inclined blocks are driven to be close to or far away from each other; and the inclined plane of slope piece is 45 angles with two sets of conveyor's moving direction for the distance that conveyor horizontal direction removed is the same with the distance that the vertical direction of supporting wheel removed, and when annular track was lived with cable parcel centre gripping, the supporting wheel just in time supported the below of cable, thereby made the cable better pull between two sets of conveyor.

Optionally, the adjusting mechanism comprises a guide rod, a screw rod and two bolts, a guide hole matched with the guide rod in a sliding manner is formed in the mounting frame, the threads of the screw rod are symmetrical in the middle, the two bolts are respectively matched with the threads at the two ends of the screw rod, and the two bolts are respectively fixed on the two mounting frames.

By adopting the technical scheme, the guide rod is matched with the guide hole, so that the guide rod can guide the movement of the conveying device; the lead screw matches with the bolt, and the rotation of lead screw will drive two installing frames and draw close each other or keep away from, and it is more convenient to adjust.

Optionally, the frame includes two stands and the pole of putting the line, it is connected with the tray to slide on the stand, be provided with the jack that orders about the tray and reciprocate on the stand, the both ends of putting the pole of line are placed on two trays.

Through adopting above-mentioned technical scheme, the jack is adjusted the height of tray, can rise the cable dish through the unwrapping wire pole, and two sets of conveyor are when drawing the cable, and the rotation of cable dish is easier.

In a second aspect, the application provides a method for using an electric power cable pay-off device, which adopts the following technical scheme:

a method of using a power line cable pay-off device, comprising the steps of:

putting one end of the cable between the two conveying devices;

the two conveying devices are driven to mutually approach through the adjusting mechanism, so that the annular tracks on the two conveying devices clamp the cable;

and the two conveying devices are driven to further approach, and the two second wheels are pressed to be away from the first wheel, so that the annular crawler belt is wrapped on the circumferential surface of the cable.

By adopting the technical scheme, the cross section shape of the annular crawler is changed, so that the working surface of the annular crawler is wrapped on the circumferential surface of the cable; the contact area between the annular crawler and the cable can be increased, so that the friction force between the annular crawler and the cable is increased, and the traction effect of the cable conveyor on the cable is improved.

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

1. the cable presses the two second wheels to be away from the first wheel respectively, and the radius of one end of each second wheel, which is far away from the first wheel, is larger than that of the first wheel, so that the second wheels extrude the edge of the annular crawler belt by combining the elastic piece, the shape of the cross section of the annular crawler belt is changed, and the working surface of the annular crawler belt is wrapped on the circumferential surface of the cable; the contact area between the annular crawler and the cable can be increased, so that the friction force between the annular crawler and the cable is increased, and the cable traction effect of the cable conveyor on the cable is improved;

2. the cross section of the annular crawler belt is in a groove shape, so that the cable can be effectively prevented from moving in all directions up and down and left and right, and the guide and limiting effects on the cable are realized;

3. the rubber sleeve is flexible, so that the working surface of the annular crawler belt can be better wrapped on the circumferential surface of the cable, and the cable traction effect of the cable conveyor on the cable is further improved.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present application.

Fig. 2 is a schematic structural diagram of a base, a conveying device and an adjusting mechanism in the first embodiment of the present application.

Fig. 3 is a schematic structural diagram of a conveying device in an embodiment of the present application.

Fig. 4 is a schematic structural diagram of the first wheel, the second wheel and the elastic member in the first embodiment of the present application.

Fig. 5 is a schematic structural view of the first wheel, the second wheel and the elastic member in the second embodiment of the present application.

Description of reference numerals: 1. a frame; 101. a column; 102. a wire releasing rod; 2. a base; 31. installing a frame; 32. a rotating wheel; 321. a first wheel; 322. a second wheel; 323. an elastic member; 33. an endless track; 4. an adjustment mechanism; 41. a guide bar; 42. a screw rod; 43. a bolt; 44. a guide hole; 5. a first accommodating groove; 6. a second accommodating groove; 7. a limiting part; 8. a limiting groove; 9. a support frame; 10. a support wheel; 11. a sliding groove; 12. a slider; 13. a connecting rod; 14. an inclined block; 15. a support block; 16. a jack; 17. a sliding wheel; 18. a motor; 19. a first bevel gear; 20. a second bevel gear; 21. and (7) fixing the plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to fig. 1-5 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The embodiment of the application discloses power cable pay-off, refer to fig. 1, including frame 1 and base 2, be provided with two sets of conveyor that mutually support on the base 2, be provided with on the base 2 and be used for adjusting two sets of conveyor and draw close each other or keep away from adjustment mechanism 4 each other. The rack 1 comprises two upright posts 101 and a pay-off rod 102, the upright posts 101 are connected with support blocks 15 in a sliding mode, jacks 16 for driving the support blocks 15 to move up and down are arranged on the upright posts 101, and two ends of the pay-off rod 102 are placed on the two support blocks 15.

Specifically, the upright column 101 comprises a frame, two vertical rods and two inclined rods, the vertical rods are fixed on the frame, and two ends of each inclined rod are respectively fixed on the frame and the vertical rods; and the frame, the vertical bar and the diagonal bar form a triangle to increase the structural strength of the upright 101. Two sliding wheels 17 are arranged on one side of the frame, and the two sliding wheels 17 are positioned on one side of the frame away from the vertical rod; the vertical rod is overturned to enable the sliding wheel 17 to be supported on the ground, and the upright post 101 can be more easily carried through the sliding wheel 17. In addition, the bracket is connected to the two vertical rods in a sliding manner, and the jack 16 is fixed to the two vertical rods.

In the embodiment of the present application, a cable drum to be paid off is placed between the two sets of columns 101, the paying off rod 102 penetrates through the center hole of the cable drum, and the two ends of the paying off rod 102 are located above the supporting blocks 15 of the two sets of columns 101. The jack 16 is manually driven to lift the two support blocks 15, so as to drive the cable tray to lift, so that the cable tray leaves the ground, and the rotation of the cable tray is easier.

The first embodiment is as follows: referring to fig. 2 and 3, the conveying device includes a mounting frame 31, two rotating wheels 32 and an endless track 33, wherein the rotating shafts of the rotating wheels 32 are rotatably connected in the mounting frame 31, and the endless track 33 is sleeved outside the two rotating wheels 32. Place the one end of cable between two sets of conveyor, adjustment mechanism 4 orders about two sets of conveyor and draws close each other for the working face of the endless track 33 on two sets of conveyor grips the cable.

For the better regulation of two sets of conveyor, adjustment mechanism 4 of this application includes guide bar 41, lead screw 42 and two bolts 43, offers on the installing frame 31 with guide bar 41 sliding fit's guiding hole 44, the screw thread of lead screw 42 is middle symmetry, two bolts 43 respectively with the both ends screw-thread fit of lead screw 42, and two bolts 43 are fixed in respectively on two installing frames 31.

Specifically, the two sides of the base 2 are both fixed with the fixing plates 21, two parallel guide rods 41 are fixed between the two fixing plates 21, and the guide rods 41 are matched with the guide holes 44, so that the movement of the conveying device can be guided. Two ends of the screw rod 42 are respectively and rotatably connected to the two fixing plates 21, the end part of the screw rod 42 penetrates through the fixing plates 21, and the end part of the screw rod 42, which is positioned outside the fixing plates 21, is in a square shape, so that the screw rod 42 can be conveniently rotated; lead screw 42 is parallel to each other with guide bar 41, and bolt 43 is fixed in the outside of installing frame 31, cooperatees through lead screw 42 and bolt 43, and lead screw 42's rotation will drive two installing frames 31 and draw close each other or keep away from, and it is more convenient to adjust.

In order to support the towed cable, two groups of supporting frames 9 are fixed on the base 2, the two groups of supporting frames 9 are respectively positioned at the wire inlet end and the wire outlet end of the conveying device, and the supporting frames 9 are rotatably connected with supporting wheels 10 used for supporting the cable. The support wheels 10 support the two ends of the cable so that the cable is better pulled between the two sets of conveyors.

A vertical sliding groove 11 is formed in the supporting frame 9, a sliding block 12 is connected in the sliding groove 11 in a sliding manner, and a rotating shaft of the supporting wheel 10 is rotatably connected to the sliding block 12; the connecting rod 13 is fixed on the mounting frame 31, the inclined block 14 is fixed at the end part of the connecting rod 13, the bottom end of the sliding block 12 is connected with the inclined surface of the inclined block 14 in a sliding way, and the inclined surface of the inclined block 14 forms an angle of 45 degrees with the moving direction of the two groups of conveying devices.

In the embodiment of the application, the two groups of conveying devices are close to or far away from each other, and the two inclined blocks 14 are driven to be close to or far away from each other; and the inclined plane of the inclined block 14 and the moving direction of the two groups of conveying devices form an angle of 45 degrees, so that the moving distance of the conveying devices in the horizontal direction is the same as the moving distance of the supporting wheel 10 in the vertical direction, and the supporting wheel 10 just supports the lower part of the cable when the annular crawler 33 clamps the cable package, so that the cable is better pulled between the two groups of conveying devices.

In order to drive the rotating wheel 32 to rotate, the lower surface of the mounting frame 31 is fixed with the motor 18, the output shaft of the motor 18 is fixed with the first bevel gear 19, the rotating shaft of the rotating wheel 32 is fixed with the second bevel gear 20, and the first bevel gear 19 is meshed with the second bevel gear 20. The first bevel gear 19 is driven by the motor 18 to rotate, so that the second bevel gear 20 rotates, and the endless track 33 moves along with the rotation of the rotating wheel 32 to pull the cable clamped between the two endless tracks 33.

Referring to fig. 3 and 4, the rotating wheel 32 includes a first wheel 321 and two second wheels 322, the first wheel 321 is fixed on the rotating shaft of the rotating wheel 32, the two second wheels 322 are connected to the rotating shaft of the rotating wheel 32 in a sliding manner, the first wheel 321 is located between the two second wheels 322, and the radius of one end of the second wheel 322 far away from the first wheel 321 is larger than that of the first wheel 321; an elastic member 323 for pressing the end of the second wheel 322 against the end of the first wheel 321 is also included.

In the embodiment of the present application, the first wheel 321 is a cylindrical wheel, the second wheel 322 is a frustum-shaped wheel, and the larger end of the second wheel 322 is far away from the first wheel 321, so that the middle of the rotating wheel 32 is concave inwards. The cable presses the two second wheels 322 to be far away from the first wheels 321 respectively, and the second wheels 322 press the edge of the endless track 33 by combining the elastic piece 323, so that the cross section shape of the endless track 33 is changed, and the working surface of the endless track 33 is wrapped on the circumferential surface of the cable; the contact area between the endless track 33 and the cable can be increased, so that the friction force between the endless track 33 and the cable is increased, and the cable traction effect of the cable conveyor on the cable is improved. In addition, the cross section of the annular crawler 33 is groove-shaped, so that the cable can be effectively prevented from moving in all directions, and the cable can be guided and limited.

Referring to fig. 4, the elastic member 323 includes a rubber sleeve, the rubber sleeve is sleeved outside the first wheel 321, two ends of the rubber sleeve are respectively fixed on the two second wheels 322, and when the rubber sleeve is in a natural state, the end of the second wheel 322 is pressed against the end of the first wheel 321.

In the embodiment of the application, the rubber sleeve applies acting force towards the first wheel 321 to the second wheel 322, and the cable presses the working surface of the endless track 33, so that the second wheel 322 is far away from the first wheel 321; since the radius of the end of the second wheel 322 remote from the first wheel 321 is greater than the radius of the first wheel 321, the working surface of the endless track 33 will be wrapped around the circumference of the cable. Meanwhile, the rubber sleeve is flexible, so that the working surface of the annular crawler 33 can be better wrapped on the circumferential surface of the cable, and the cable traction effect of the cable conveyor on the cable is further improved.

A limiting part 7 is fixed at the end part of the first wheel 321, and a limiting groove 8 which is in inserting fit with the limiting part 7 is formed at the end part of the second wheel 322; the limiting portion 7 is engaged with the limiting groove 8, so that the second wheel 322 rotates along with the first wheel 321, and the first wheel 321 and the second wheel 322 preferably drive the endless track 33 to rotate. The limiting part 7 is sheet-shaped, and the limiting part 7 is located at the edge of the first wheel 321; the sheet-shaped limiting portion 7 can support the endless track 33, and the edge of the endless track 33 is prevented from sliding between the first wheel 321 and the second wheel 322, so that the endless track 33 can better convey the cable to be pulled.

In the second embodiment, referring to fig. 5, the difference between the first embodiment and the second embodiment is that the elastic element 323 includes two extension springs, the first receiving groove 5 is disposed at both ends of the first wheel 321, the second receiving groove 6 is disposed at one end of the second wheel 322 facing the first wheel 321, both ends of the extension springs are respectively fixed to the groove walls of the first receiving groove 5 and the second receiving groove 6, and when the extension springs are in a natural state, the end of the second wheel 322 abuts against the end of the first wheel 321.

In the embodiment of the present application, the tension spring applies a force to the second wheel 322 toward the first wheel 321, and the cable presses the working surface of the endless track 33, so that the second wheel 322 is away from the first wheel 321; because the radius of the end of the second wheel 322 far away from the first wheel 321 is larger than that of the first wheel 321, the working surface of the endless track 33 is wrapped on the circumferential surface of the cable, and the structure is simpler.

The embodiment of the application also discloses a using method of the power cable pay-off device, which comprises the following steps: putting one end of the cable between the two conveying devices; the two conveying devices are driven to approach each other through the adjusting mechanism 4, so that the annular crawler belts 33 on the two conveying devices clamp the cable; the two conveyors are urged further together against the two second wheels 322 away from the first wheels 321 so that the endless track 33 wraps around the circumference of the cable. The contact area between the endless track 33 and the cable can be increased, so that the friction force between the endless track 33 and the cable is increased, and the cable traction effect of the cable conveyor on the cable is improved.

The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the application in any way, and any features disclosed in this specification (including the abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

Claims

1. The utility model provides an electric power cable pay-off, includes frame (1) and base (2), be provided with two sets of conveyor that mutually support on base (2), be provided with on base (2) and be used for adjusting adjustment mechanism (4) that two sets of conveyor draw close each other or keep away from, conveyor includes installing frame (31), two runners (32) and annular track (33), the pivot of runner (32) is rotated and is connected in installing frame (31), annular track (33) cup joint outside two runners (32), its characterized in that: the rotating wheel (32) comprises a first wheel (321) and two second wheels (322), the first wheel (321) is fixed on a rotating shaft of the rotating wheel (32), the two second wheels (322) are connected to the rotating shaft of the rotating wheel (32) in a sliding mode, the first wheel (321) is located between the two second wheels (322), and the radius of one end, far away from the first wheel (321), of each second wheel (322) is larger than that of the first wheel (321); and an elastic piece (323) for pressing the end part of the second wheel (322) against the end part of the first wheel (321).

2. An electrical power line pay-off device as claimed in claim 1, wherein: the elastic piece (323) comprises a rubber sleeve, the rubber sleeve is sleeved outside the first wheel (321), two ends of the rubber sleeve are respectively fixed on the two second wheels (322), and when the rubber sleeve is in a natural state, the end part of each second wheel (322) is pressed against the end part of the corresponding first wheel (321).

3. An electrical power line pay-off device as claimed in claim 1, wherein: elastic component (323) includes two extension spring, first holding tank (5) have all been seted up at the both ends of first round (321), second holding tank (6) have been seted up towards the one end of first round (321) in second round (322), extension spring's both ends are fixed in the cell wall of first holding tank (5) and second holding tank (6) respectively, work as when extension spring is under the natural state, the tip of second round (322) is supported and is pressed in the tip of first round (321).

4. An electrical power line pay-off device as claimed in claim 2 or 3, wherein: the end part of the first wheel (321) is provided with a limiting part (7), and the end part of the second wheel (322) is provided with a limiting groove (8) which is in plug-in fit with the limiting part (7).

5. An electrical power line pay-off device as claimed in claim 4, wherein: the limiting part (7) is sheet-shaped, and the limiting part (7) is located at the edge of the first wheel (321).

6. An electrical power line pay-off device as claimed in claim 1, wherein: the cable conveying device is characterized in that two groups of supporting frames (9) are arranged on the base (2), the two groups of supporting frames (9) are respectively located at a wire inlet end and a wire outlet end of the conveying device, and supporting wheels (10) used for supporting cables are connected to the supporting frames (9) in a rotating mode.

7. An electrical power line pay-off device as claimed in claim 6, wherein: a vertical sliding groove (11) is formed in the supporting frame (9), a sliding block (12) is connected in the sliding groove (11) in a sliding manner, and a rotating shaft of the supporting wheel (10) is rotatably connected to the sliding block (12); the mounting frame (31) is fixed with connecting rod (13), the tip of connecting rod (13) is fixed with slope piece (14), the bottom of slider (12) slides and connects in the inclined plane of slope piece (14), just the inclined plane of slope piece (14) is 45 angles with two sets of conveyor's moving direction.

8. An electrical power line pay-off device as claimed in claim 1, wherein: adjustment mechanism (4) include guide bar (41), lead screw (42) and two bolt (43), set up on installing frame (31) with guide bar (41) sliding fit's guiding hole (44), the screw thread of lead screw (42) is middle symmetry, two bolt (43) respectively with the both ends screw-thread fit of lead screw (42), and two bolt (43) are fixed in respectively on two installing frame (31).

9. An electrical power line pay-off device as claimed in claim 1, wherein: the wire releasing machine is characterized in that the rack (1) comprises two upright posts (101) and a wire releasing rod (102), the upright posts (101) are connected with supporting blocks (15) in a sliding mode, jacks (16) driving the supporting blocks (15) to move up and down are arranged on the upright posts (101), and two ends of the wire releasing rod (102) are placed on the two supporting blocks (15).

10. A method of using a device for paying out an electric power cable, applied to a device for paying out an electric power cable according to any one of claims 1 to 4, characterized in that it comprises the following steps:

one end of the cable is placed between the two groups of conveying devices;

the two groups of conveying devices are driven to mutually approach through the adjusting mechanism (4), so that the working surfaces of the annular tracks (33) on the two groups of conveying devices clamp the cables;

the two groups of conveying devices are driven to further close and press the two second wheels (322) away from the first wheels (321), so that the working surface of the annular crawler belt (33) is wrapped on the circumferential surface of the cable.