Pulley for power transmission line construction

Abstract

The invention discloses a pulley for power transmission line construction, and relates to the technical field of cable laying auxiliary equipment, and the pulley comprises a base frame and at least one pulley part; a gantry-type hanging bracket is further arranged on the base frame, a cross rod part is arranged in the middle of the gantry-type hanging bracket, the device further comprises a downward pressing pulley assembly, a driving part and at least one set of rotary clamping and fixing parts, the end of the downward pressing pulley assembly is located on the upper side of the pulley part, and the downward pressing pulley assembly is used for pressing a cable passing through the pulley part downwards from the upper side; the driving part is used for driving the rotary clamping part to rotate around the connecting position of the rotary clamping part and the transverse rod part, and the end, away from the transverse rod part, of the rotary clamping part can make contact with and clamp a cable passing through the lower side of the rotary clamping part. The cable tensioning device is simple in structure, a cable can be conveniently arranged in the annular groove of the pulley part and is not prone to slipping off during cable laying construction, the cable can be clamped from the two sides during cable tensioning operation, friction between the cable and surrounding objects due to sag when the cable loads a heavy object is avoided, and practicability is high.

Description

Technical Field

[0001] The invention relates to the technical field of cable laying auxiliary equipment, in particular to a pulley for power transmission line construction. Background Art

[0002] The pulley used in the construction of power transmission lines is the wire laying pulley, which is a tool used to protect cable conductors in power construction. The wire laying pulley is mainly used to protect the cable conductors when laying them, which can save time and effort. It is suitable for laying high-voltage cables on the ground and cable trays, which can effectively reduce cable friction and speed up construction.

[0003] The basic structure of the current wire-laying pulley includes a frame and multiple pulleys. The pulleys are installed on the frame, and the cables pass around the pulleys and are in the annular grooves of the pulleys. This type of wire-laying pulley can only play a guiding role and prevent the cables from directly contacting other objects; and the cables are easy to detach from the pulley in a relaxed state, and during the tightening operation, the cables may be loaded with a certain amount of pressure, and the pulley does not have the function of tightening the cables, which causes the cables to sag and rub against surrounding objects. Summary of the invention

[0004] The object of the present invention is to provide a pulley for power transmission line construction to solve the problems raised in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A pulley for power transmission line construction, comprising a base frame and at least one pulley part, wherein the base frame is provided with symmetrical pulley support seats and the pulley part is rotatably installed between the two pulley support seats, and the top of the pulley support seat has a guiding curved portion bent away from the pulley part; a gantry-type hanger is also provided on the base frame, and a crossbar portion is provided in the middle of the gantry-type hanger, and the center line of the pulley part vertically passes through the gantry-type hanger; and further comprising a pressing pulley assembly, a driving part and at least one set of rotating clamping parts, wherein a set of rotating clamping parts is two and the two rotating clamping parts are The center line of the pulley part is symmetrically arranged, and one end of the rotating clamping component close to the pulley part is rotatably connected to the cross bar part, the pressing pulley assembly is arranged in the middle position of the cross bar part and the end of the pressing pulley assembly is located on the upper side of the pulley part, and the pressing pulley assembly is used to press down the cable passing through the pulley part from the upper side; the driving component is arranged on the cross bar part and each group of rotating clamping components is connected to the driving component, and the driving component is used to drive the rotating clamping component to rotate around the connection with the cross bar part, and the end of the rotating clamping component away from the cross bar part can contact and clamp the cable passing through its lower side.

[0007] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0008] The cam is connected to the drive mechanism, and the cam is connected with the drive mechanism by the support of the driving member, and the cam is connected with the drive mechanism by the support of the driving member, and the cam is connected with the drive mechanism by the support of the driving member, and the cam is connected with the drive mechanism by the support of the driving member, and the cam is connected with the drive mechanism by the support of the driving member

[0009] In an optional scheme: the pulling part includes a T-rod, a movable push-pull member and a clamping pull rope, the front end of the T-rod is fixedly connected to the rotating frame and a guide roller is provided on the T-rod, the movable push-pull member is slidably arranged on the T-rod and the movable push-pull member is connected to the tops of the two clamping parts, one end of the clamping pull rope is connected to the movable push-pull member and the other end bypasses the guide roller and is connected to the side of the cross bar, and the movable push-pull member is also connected to the front end of the T-rod through a reset spring.

[0010] In an optional scheme: the movable push-pull member includes a sliding sleeve and two clamping connecting rods, the sliding sleeve is slidably mounted on the T-bar and connected to one end of the clamping pull rope, and the sliding sleeve is also connected to one end of the T-bar; two upper columns are arranged on the sliding sleeve and one end of the two clamping connecting rods are respectively hinged to the two upper columns, and the other end of the upper column is hinged to the top of the clamping part located on the same side.

[0011] In an optional scheme: the clamping part includes a connecting body, an arc-shaped clamping plate and an upper sliding sleeve, the connecting body is attached to the surface of the contact roller and the upper side of the connecting body is fixedly connected to the upper sliding sleeve on the front fixed rod shaft, and the arc top of the upper sliding sleeve is provided with an upper connecting column connected to one end of the clamping connecting rod; the arc-shaped clamping plate is fixed to the lower side of the connecting body and the inner wall of the arc-shaped clamping plate is provided with a plurality of friction-increasing strips equidistantly distributed along the axis of the arc-shaped clamping plate.

[0012] In an optional scheme: a connecting frame is provided on the rotating frame, and the driving component includes a screw rod, a rotating motor and two toggle blocks, the screw rod is rotatably arranged on the cross bar and the two toggle blocks are slidably arranged on the cross bar; one end of the screw rod is connected to the rotating motor and the rotating motor is used to drive the screw rod to rotate, the two ends of the screw rod have opposite spiral directions and the two ends are respectively spirally passed through the two toggle blocks, the side of the toggle block is provided with an extension column and the extension column passes through the corresponding connecting frame.

[0013] In an optional scheme: a vertical connecting rod is also fixed in the middle position of the cross bar part, and the vertical connecting rod is rotatably connected to the main shaft part of the pulley part; the downward pressure pulley assembly includes a downward pressure sleeve, an upper extension rod frame and at least one downward pressure pulley member, the downward pressure sleeve is slidably sleeved on the vertical connecting rod and the side of the downward pressure sleeve is provided with a downward pressure side column extending to the upper side of the pulley part, the downward pressure pulley member is rotatably arranged on the downward pressure side column, the lower end of the upper extension rod frame is rotatably connected to the downward pressure side column, the top of the upper extension rod frame extends to the upper side of the cross bar part, and the top of the upper extension rod frame is connected to the upper side wall of the cross bar part through a downward pressure spring member.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The pressing pulley assembly in the present invention can press down the cable on its lower side to prevent the cable from falling off the pulley part when it is loose. The distance between the pressing pulley assembly and the pulley part can be adjusted, so that when laying the cable, the cable slides from the side between the pressing pulley assembly and the pulley part.

[0016] 2. In the present invention, the ends of the two rotating clamping parts of each group away from the cross bar part can also clamp the cable from both sides of the pulley part to facilitate the tightening operation and avoid the phenomenon that the cable sag changes and may cause friction with other objects when the cable is loaded with heavy objects.

[0017] 3. The present invention has a simple structure, and the cable is placed in the annular groove of the pulley part during cable laying construction and is not easy to slip off. During the cable tightening operation, the cable can be clamped from both sides to avoid the cable sag and friction with surrounding objects when the cable is loaded with heavy objects, and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the pulley in one embodiment of the present invention.

[0019] Figure 2 The figure is a schematic diagram of the pulley structure without the rotating clamping component in one embodiment of the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of a rotating clamping component in one embodiment of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of the clamping part in one embodiment of the present invention.

[0022] Figure 5 It is a schematic structural diagram of a push-down pulley assembly in one embodiment of the present invention.

[0023] Reference numerals: base frame 100, pulley support seat 110, guide bending portion 120, pulley portion 200, gantry type hanger 300, cross bar portion 310, vertical connecting rod 320, downward pressure pulley assembly 400, downward pressure sleeve body 410, upper extension rod frame 420, downward pressure side column 430, downward pressure pulley member 440, downward pressure spring member 450, rotating clamping member 500, rotating frame body 510, supporting shaft portion 520, connecting frame body 530, front fixed rod shaft 5 40. Contact roller 550, clamping part 560, connecting body 561, arc-shaped clamping plate 562, upper sliding sleeve 563, upper connecting column 564, friction strip 565, T-bar 570, movable push-pull member 580, sliding sleeve 581, upper column 582, clamping link 583, clamping pull rope 590, guide roller body 591, return spring member 592, driving member 600, screw rod member 610, toggle block 620, extension column 630, rotating motor 640. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; in the accompanying drawings or descriptions, similar or identical parts use the same reference numerals, and in practical applications, the shape, thickness or height of each component can be enlarged or reduced. The various embodiments listed in the present invention are only used to illustrate the present invention and are not used to limit the scope of the present invention. Any obvious modifications or changes made to the present invention do not depart from the spirit and scope of the present invention.

[0025] The left, right, up, and down positions of the various components given in the drawings are only one arrangement method, and the specific positions are set according to specific needs.

[0026] In one embodiment, Figure 1-Figure 4As shown, a pulley for power transmission line construction includes a base frame 100 and at least one pulley part 200, wherein the base frame 100 is provided with symmetrical pulley support seats 110 and the pulley part 200 is rotatably installed between the two pulley support seats 110, and the top of the pulley support seat 110 has a guiding curved portion 120 curved toward a side away from the pulley part 200; a gantry type hanger 300 is also provided on the base frame 100, and a cross bar portion 310 is provided in the middle of the gantry type hanger 300, and the center line of the pulley part 200 vertically passes through the gantry type hanger 300; and further includes a pressing pulley assembly 400, a driving component 600 and at least one set of rotating clamping components 500, wherein a set of rotating clamping components 500 is two and the two rotating clamping components 510 are arranged on the base frame 100. 00 is symmetrically arranged about the center line of the pulley portion 200, one end of the rotating clamping component 500 close to the pulley portion 200 is rotatably connected to the cross bar portion 310, the pressing pulley assembly 400 is arranged in the middle position of the cross bar portion 310 and the end of the pressing pulley assembly 400 is located on the upper side of the pulley portion 200, and the pressing pulley assembly 400 is used to press down the cable passing through the pulley portion 200 from the upper side; the driving component 600 is arranged on the cross bar portion 310 and each group of rotating clamping components 500 is connected to the driving component 600, and the driving component 600 is used to drive the rotating clamping component 500 to rotate around the connection with the cross bar portion 310, and the end of the rotating clamping component 500 away from the cross bar portion 310 can contact and clamp the cable passing through its lower side.

[0027] In the embodiment of the present invention, in the initial state, the rotating clamping member 500 is in a horizontal state, and the pressing pulley assembly 400 is pulled upward and is moved away from the corresponding pulley portion 200; because the guiding curved portion 120 is bent outward, the diameter of the area where the cable passes through the pulley portion 200 can be hung on the guiding curved portion 120, and under the guidance of the guiding curved portion 120, the cable passes through the pulley portion 200 from the upper side and the cable is between the pulley portion 200 and the pressing pulley assembly 400, the pressing pulley assembly 400 is released and the pressing pulley assembly 400 automatically moves downward, and the pressing pulley assembly 400 presses downward. The cable on its lower side is to prevent the cable from falling off the pulley part 200 when it is loose; when the cable is laid and needs to be tightened, the driving component 600 starts to work and drives the rotating clamping component 500 to rotate downward around the connection between it and the cross bar part 310, and one end of the rotating clamping component 500 rotating downward gradually approaches the cable surface and contacts it. The ends of the two rotating clamping components 500 of each group away from the cross bar part 310 can also clamp the cable from both sides of the pulley part 200 to facilitate the tightening operation and avoid the phenomenon that the cable sag changes when heavy objects are loaded on the cable and may cause friction with other objects.

[0028] In one embodiment, Figure 1-Figure 4As shown, the rotating clamping component 500 includes a rotating frame body 510, a supporting shaft portion 520, a contact roller 550, a pulling portion and two clamping portions 560. One end of the rotating frame body 510 is rotatably connected to the side of the cross bar portion 310 through the supporting shaft portion 520. The rotating frame body 510 is also connected to the driving component 600 and the driving component 600 can drive the rotating frame body 510 to rotate around the axis of the supporting shaft portion 520. The other end of the rotating frame body 510 is provided with a front fixed rod shaft 540 and the contact roller 550 is rotatably provided on the front fixed rod shaft 540. The two clamping portions 560 are both axially slidably provided on the front fixed rod shaft 540 and the two clamping portions 560 are symmetrically provided relative to the contact roller 550. The pulling portion is provided on the rotating frame body 510, and one end of the pulling portion is connected to the two clamping portions 560. And the other end is connected to the side of the cross bar portion 310. When the pulling portion rotates around the supporting shaft portion 520 along with the rotating frame body 510, the pulling portion can drive the two clamping portions 560 to move axially on the front fixed rod shaft 540 and the two clamping portions 560 move in opposite directions. In this embodiment of the present invention, when it is necessary to tighten the cable, the driving component 600 acts on the rotating frame body 510 and the rotating frame body 510 moves downward around the supporting shaft portion 520. The contact roller 550 and the clamping portion 560 both rotate downward. The cable passes between the two clamping portions 560 and contacts the outer wall of the contact roller 550. When the pulling portion rotates downward along with the rotating frame body 510, the two clamping portions 560 move toward each other on the front fixed rod shaft 540. When the cable contacts the outer wall of the contact roller 550, the two clamping portions 560 clamp the cable.

[0029] In one embodiment, Figure 1-Figure 4 As shown, the pulling part includes a T-bar 570, a movable push-pull member 580 and a clamping pull rope 590. The front end of the T-bar 570 is fixedly connected to the rotating frame 510 and a guide roller 591 is provided on the T-bar 570. The movable push-pull member 580 is slidably arranged on the T-bar 570 and the movable push-pull member 580 is connected to the tops of the two clamping parts 560. One end of the clamping pull rope 590 is connected to the movable push-pull member 580 and the other end bypasses the guide roller 591 and is connected to the side of the cross bar 310. The movable push-pull member 580 is also connected to the T-bar 570 through a reset spring member 592. The front ends are connected; in the embodiment of the present invention, when the rotating frame body 510 rotates downward around the supporting shaft portion 520, the clamping pull rope 590 will pull the movable push-pull member 580 due to its own length and make the movable push-pull member 580 move toward the side away from the contact roller 550 on the T-bar 570, and the movable push-pull member 580 pulls the two clamping parts 560 to move toward each other; when the rotating frame body 510 moves upward, the clamping pull rope 590 no longer pulls the movable push-pull member 580, and the movable push-pull member 580 is reset under the elastic action of the reset spring member 592, so that the two clamping parts 560 move away from each other and release the cable.

[0030] In one embodiment, Figure 1-Figure 4 As shown, the movable push-pull member 580 includes a sliding sleeve 581 and two clamping links 583, the sliding sleeve 581 is slidably mounted on the T-bar 570 and connected to one end of the clamping pull rope 590, and the sliding sleeve 581 is also connected to one end of the T-bar 570; two upper cylinders 582 are arranged on the sliding sleeve 581 and one end of the two clamping links 583 are respectively hinged to the two upper cylinders 582, and the other end of the upper cylinder 582 is hinged to the top of the clamping portion 560 located on the same side; in the embodiment of the present invention, when the sliding sleeve 581 moves along the T-bar 570 under the action of the clamping pull rope 590 and the return spring member 592, the ends of the two clamping links 583 connected to the sliding sleeve 581 move, so that the ends of the clamping links 583 connected to the clamping portion 560 move along the front fixed rod shaft 540 under the restriction of the clamping portion 560, so that the two clamping portions 560 move on the front fixed rod shaft 540.

[0031] In one embodiment, Figure 1-Figure 4 As shown, the clamping portion 560 includes a connecting body 561, an arc-shaped clamping plate 562 and an upper sliding sleeve 563, the connecting body 561 is attached to the surface of the contact roller 550 and the upper side of the connecting body 561 is fixedly connected to the upper sliding sleeve 563 which slides on the front fixed rod shaft 540, and the arc top of the upper sliding sleeve 563 is provided with an upper connecting column 564 connected to one end of the clamping link 583; the arc-shaped clamping plate 562 is fixed to the lower side of the connecting body 561 and the inner wall of the arc-shaped clamping plate 562 is provided with a plurality of friction strips 565 which are equidistantly distributed along the axis of the arc-shaped clamping plate 562; in the embodiment of the present invention, the connecting body 561 can move along the surface of the contact roller 550 and a semicircular groove is formed between the connecting body 561 and the arc-shaped clamping plate 562, the interior of the semicircular groove is in contact with the outer wall of the cable and through the action of the friction strips 565, the firmness of the cable clamping is effectively increased.

[0032] In one embodiment, Figure 1-Figure 3As shown, the rotating frame 510 is provided with a connecting frame 530, and the driving component 600 includes a screw rod 610, a rotating motor 640 and two toggle blocks 620, wherein the screw rod 610 is rotatably arranged on the cross bar 310 and the two toggle blocks 620 are slidably arranged on the cross bar 310; one end of the screw rod 610 is connected to the rotating motor 640 and the rotating motor 640 is used to drive the screw rod 610 to rotate, and the two ends of the screw rod 610 have opposite spiral directions and the two ends thereof are respectively spirally penetrated through the two toggle blocks 620, and the side of the toggle block 620 is provided with an extension column 6 30 and the extension column 630 passes through the corresponding connecting frame 530; in the embodiment of the present invention, the rotating motor 640 drives the screw rod 610 to rotate, and the screw rod 610 drives the toggle block 620 to move along the cross bar portion 310 by cooperating with the toggle block 620, and the extension column 630 moves with the toggle block 620 and causes the rotating frame 510 to rotate around the supporting shaft portion 520 by toggling the connecting frame 530; since the two rotating clamping components 500 are respectively located on both sides of the pulley portion 200, the rotation directions of the two rotating clamping components 500 need to be kept in opposite states.

[0033] In one embodiment, Figure 1 , Figure 2 and Figure 5 As shown, a vertical connecting rod 320 is also fixed to the middle position of the cross bar portion 310, and the vertical connecting rod 320 is rotatably connected to the main shaft portion of the pulley portion 200; the downward pressure pulley assembly 400 includes a downward pressure sleeve body 410, an upper extension rod frame 420 and at least one downward pressure pulley member 440, the downward pressure sleeve body 410 is slidably sleeved on the vertical connecting rod 320, and the side of the downward pressure sleeve body 410 is provided with a downward pressure side column 430 extending to the upper side of the pulley portion 200, the downward pressure pulley member 440 is rotatably arranged on the downward pressure side column 430, the lower end of the upper extension rod frame 420 is rotatably connected to the downward pressure side column 430, the top of the upper extension rod frame 420 extends to the upper side of the cross bar portion 310, and the top of the upper extension rod frame 420 is connected to the upper side wall of the cross bar portion 310 through a downward pressure spring member 45 0 is connected; in the embodiment of the present invention, when the upper extension rod frame 420 is lifted upward, the downward pressing sleeve 410 moves upward along the vertical connecting rod 320 and the downward pressing pulley member 440 moves along with the downward pressing sleeve 410, so that the gap between the downward pressing pulley member 440 and the pulley portion 200 increases, thereby facilitating the cable to slide from the guide curved portion 120 into the annular groove 220; after the upper extension rod frame 420 is released, the upper extension rod frame 420 moves downward under the elastic force of the downward pressing spring member 450, and the downward pressing sleeve 410 and the downward pressing pulley member 440 both move downward, so the downward pressing pulley member 440 can press the cable from the upper side, and due to the rotational cooperation between the downward pressing pulley member 440 and the downward pressing side column 430, the downward pressing pulley member 440 will not restrict the movement of the cable.

[0034] The above embodiment provides a pulley for power transmission line construction, wherein when installing the cable, the pressing pulley assembly 400 is pulled upward and the pressing pulley assembly 400 is moved away from the corresponding pulley portion 200; since the guide curved portion 120 is bent outward, the diameter of the area where the cable passes through the pulley portion 200 can be hung on the guide curved portion 120, and under the guidance of the guide curved portion 120, the cable passes through the pulley portion 200 from the upper side and the cable is between the pulley portion 200 and the pressing pulley assembly 400, the pressing pulley assembly 400 is released and the pressing pulley assembly 400 automatically moves downward, and the pressing pulley assembly 400 presses downward. The cable on its lower side is to prevent the cable from falling off the pulley part 200 when it is loose; when the cable is laid and needs to be tightened, the driving component 600 starts to work and drives the rotating clamping component 500 to rotate downward around the connection between it and the cross bar part 310, and one end of the rotating clamping component 500 rotating downward gradually approaches the cable surface and contacts it. The ends of the two rotating clamping components 500 of each group away from the cross bar part 310 can also clamp the cable from both sides of the pulley part 200 to facilitate the tightening operation and avoid the phenomenon that the cable sag changes when heavy objects are loaded on the cable and may cause friction with other objects.

[0035] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A pulley for power transmission line construction, comprising a base frame and at least one pulley portion, wherein the base frame is provided with symmetrical pulley support seats and the pulley portion is rotatably mounted between two pulley support seats, characterized in that: The top of the pulley support seat has a guiding curved portion curved toward a side away from the pulley portion; A gantry type hanger is also provided on the base frame, and a crossbar portion is provided in the middle of the gantry type hanger, and the center line of the pulley portion vertically passes through the gantry type hanger; Also included is a hold-down pulley assembly, a drive component, and at least one set of rotating clamping components; A set of rotating clamping parts is two and the two rotating clamping parts are symmetrically arranged about the center line of the pulley part. One end of the rotating clamping part close to the pulley part is rotatably connected to the cross bar part. The pressing pulley assembly is arranged in the middle of the cross bar part and the end of the pressing pulley assembly is located on the upper side of the pulley part. The pressing pulley assembly is used to press down the cable passing through the pulley part from the upper side. The driving component is arranged on the crossbar and each group of rotating clamping components is connected to the driving component, and the driving component is used to drive the rotating clamping component to rotate around the connection with the crossbar. The end of the rotating clamping component away from the crossbar can contact and clamp the cable passing under it.

2. The pulley for power transmission line construction according to claim 1, characterized in that: The rotating clamping component includes a rotating frame, a supporting shaft portion, a contact roller, a pulling portion and two clamping portions; One end of the rotating frame is rotatably connected to the side of the crossbar portion through the supporting shaft portion, and the rotating frame is also connected to the driving component, and the driving component can drive the rotating frame to rotate around the axis of the supporting shaft portion; The other end of the rotating frame is provided with a front fixed rod shaft and the contact roller is rotatably arranged on the front fixed rod shaft, and the two clamping parts are axially slidably arranged on the front fixed rod shaft and the two clamping parts are symmetrically arranged relative to the contact roller; The pulling part is arranged on the rotating frame, one end of the pulling part is connected to the two clamping parts and the other end is connected to the side of the cross bar part. When the pulling part rotates around the supporting shaft part along with the rotating frame, the pulling part can drive the two clamping parts to move axially on the front fixed rod axis and the two clamping parts move in opposite directions.

3. The pulley for power transmission line construction according to claim 2, characterized in that: The pulling part includes a T-shaped rod, a movable push-pull member and a clamping pulling rope; The front end of the T-shaped rod is fixedly connected to the rotating frame and a guide roller is arranged on the T-shaped rod. The movable push-pull member is slidably arranged on the T-shaped rod and the movable push-pull member is connected to the tops of the two clamping parts. One end of the clamping pull rope is connected to the movable push-pull member and the other end is connected to the side of the crossbar portion by passing around the guide roller body. The movable push-pull member is also connected to the front end of the T-bar through a reset spring member.

4. The pulley for power transmission line construction according to claim 3, characterized in that: The movable push-pull member comprises a sliding sleeve and two clamping connecting rods; The sliding sleeve is slidably mounted on the T-shaped rod and connected to one end of the clamping and pulling rope, and the sliding sleeve is also connected to one end of the T-shaped rod; Two upper columns are arranged on the sliding sleeve, and one end of two clamping connecting rods is hinged to the two upper columns respectively, and the other end of the upper columns is hinged to the top of the clamping part located on the same side.

5. The pulley for power transmission line construction according to claim 4, characterized in that: The clamping part comprises a connecting body, an arc-shaped clamping plate and an upper sliding sleeve; The connecting body is attached to the surface of the contact roller and an upper sliding sleeve which is slidably mounted on the front fixed rod shaft is fixedly connected to the upper side of the connecting body, and an upper connecting column connected to one end of the clamping connecting rod is arranged at the arc top of the upper sliding sleeve; The arc-shaped clamping plate is fixed on the lower side of the connecting body and a plurality of friction-increasing strips equidistantly distributed along the axis of the arc-shaped clamping plate are arranged on the inner wall of the arc-shaped clamping plate.

6. The pulley for power transmission line construction according to claim 2, characterized in that: The rotating frame is provided with a connecting frame, and the driving component includes a screw rod, a rotating motor and two toggle blocks; The screw rod part is rotatably arranged on the cross bar part and the two toggle blocks are slidably arranged on the cross bar part; one end of the screw rod part is connected to a rotating motor and the rotating motor is used to drive the screw rod part to rotate, the spiral directions of the two ends of the screw rod part are opposite and the two ends are respectively spirally passed through the two toggle blocks, and the side of the toggle block is provided with an extension column and the extension column passes through the corresponding connection frame.

7. The pulley for power transmission line construction according to any one of claims 1 to 6, characterized in that: A vertical connecting rod is also fixed at the middle of the crossbar portion, and the vertical connecting rod is rotatably connected to the main shaft portion of the pulley portion; The pressing pulley assembly comprises a pressing sleeve, an upper extension rod frame and at least one pressing pulley member; The pressing sleeve body is slidably sleeved on the vertical connecting rod and a pressing side column extending to the upper side of the pulley part is arranged on the side of the pressing sleeve body; The pressing pulley is rotatably arranged on the pressing side column, the lower end of the upper extension rod frame is rotatably connected with the pressing side column, the top of the upper extension rod frame extends to the upper side of the cross bar part, and the top of the upper extension rod frame is connected with the upper side wall of the cross bar part through the pressing spring part.

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