A fixed double pole insulation folding ladder of a pole holding rod and a mounting method thereof

Abstract

The application discloses a double-pole insulation folding ladder of a pole-holding type and a mounting method thereof, comprising a double-pole insulation ladder body, a pole-holding fixing device and a hoisting device. The double-pole insulation ladder body is composed of a plurality of ladder units connected at the head and tail. The ladder units can be folded and combined with each other. The hoisting device stretches the folded ladder and plays a safety role. The folded ladder is fixed by holding the pole through the pole-holding fixing device. The long climbing ladder is set as shorter ladder units, which is convenient for transportation and storage. The ladder units can be quickly unfolded during use, and the number of the ladder units can be increased or decreased according to the required working height. The pole can be automatically fixed by controlling the motor at a long distance. A stable triangular supporting structure is formed, the safety is high, the mounting is convenient and fast, the use range is wide, and the application is almost not affected by the field operation environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power auxiliary equipment, and particularly relates to a double-pole insulated folding ladder of a holding pole fixed type and a mounting method thereof. BACKGROUND

[0002] At present, the State Grid develops climbing distribution network operation, and an insulated boom truck is widely used. The insulated boom truck has advantages of convenient ascending, large operation range and high mechanical strength. However, for distribution lines in hilly, mountainous, farmland and small alleys, the insulated boom truck is too large to be positioned due to complex terrain and traffic restrictions. The centipede ladder and the insulated scaffold can make up for the deficiency of the boom truck and are not limited by terrain.

[0003] CN 117027622 A discloses a foot-pushing type centipede ladder, which comprises a centipede ladder body and a pull rope connected to the upper end of the centipede ladder body and used for keeping the centipede ladder body vertical on the ground. This type of centipede ladder is mainly used in China and less used abroad. Due to the high center of gravity, the centipede ladder is prone to overturning, and the height is limited, so it is difficult to adjust to a suitable working posture and force support point on the top, and it is very inconvenient to carry out high-altitude live-line work.

[0004] CN 117344952 A discloses an insulated scaffold, which comprises a scaffold main body, the scaffold main body is divided into three parts, and the bottom of the scaffold main body is provided with a bottom support structure. Further, the scaffold main body is composed of a bottom support structure, a connection layer structure and a top support structure, the four corners of the bottom support structure are provided with stand columns, a plurality of climbing poles are fixedly connected between every two stand columns, and a hollow plate assembly is connected to the climbing poles. This type of scaffold is convenient to use, but the workload of installation and removal is too large, the ground flatness and space requirement are high, and it is very inconvenient for long-distance transportation in ordinary rural areas. It is generally used for climbing operation of overhead lines in transformer substations or ground hardening.

[0005] Therefore, the present application provides a double-pole insulated folding ladder of a holding pole fixed type to solve the above technical problems. SUMMARY

[0006] The present application aims at solving the shortcomings in the prior art and provides a double-pole insulated folding ladder of a holding pole fixed type and a mounting method thereof.

[0007] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0008] The double-pole insulated folding ladder of the holding pole fixed type comprises a double-pole insulated climbing ladder main body, a holding pole fixing device and a hoisting device, and is characterized in that the double-pole insulated climbing ladder main body comprises a plurality of climbing ladder units connected in a head-to-tail manner through connecting pieces, and the climbing ladder units are in a multi-layer folded state before use.

[0009] The pole holding device comprises a long insulating connecting pipe, the two ends of the long insulating connecting pipe are respectively connected with a pole fastening mechanism and a ladder fastening ring, the ladder fastening ring is used for connecting a double-pole insulating ladder body, and the pole fastening mechanism is used for connecting an external electric pole.

[0010] The hoisting device comprises a triangular support, the two ends of the triangular support are respectively provided with a hoop and an electric hoist, and the hoop is used for connecting an external electric pole.

[0011] Preferably, the ladder unit comprises two vertical poles and a plurality of horizontal poles, the horizontal poles are equidistantly arranged between the two vertical poles, and the ends of the two adjacent vertical poles are connected through a connecting piece.

[0012] Preferably, the connecting piece comprises a male joint at the lower end of the vertical pole, a lower hinge and a lock hook, and a female joint at the upper end of the vertical pole, an upper hinge and a lock, the lower hinge and the upper hinge are connected through a bolt, the lock hook is clamped with the lock, and the male joint and the female joint are respectively provided with corresponding pin holes, and a quick pull safety pin is inserted into the pin holes.

[0013] Preferably, the pole fastening mechanism comprises an assembly base plate, two worm fixing plates are arranged at the central axis of the assembly base plate, a remote control motor is arranged on the worm fixing plate, a worm is connected to the output end of the remote control motor, two rotating shafts are symmetrically arranged on the two sides of the central axis of the assembly base plate, a worm wheel and a pole holding arm are arranged on each rotating shaft, the worm wheel and the pole holding arm are transmissionally connected through a transmission pin shaft, the two worm wheels are meshed with the worm, a connecting plate and a cover plate are arranged on the assembly base plate, and the connecting plate and the cover plate are assembled into a closed box body, the remote control motor drives the worm to rotate, drives the two worm wheels to rotate in opposite directions synchronously, and realizes the opening and closing of the pole holding arm.

[0014] Preferably, the ladder fastening ring comprises a fixed ring and a movable ring, one end of the fixed ring and the movable ring is connected through a pin shaft to form a hinge structure, a knuckle bolt is assembled at the other end of the fixed ring, a butterfly nut is threadedly connected to the knuckle bolt, the other end of the movable ring is provided with a square opening, after the knuckle bolt is sleeved into the square opening, the butterfly nut is manually tightened, the ladder fastening ring can clamp the vertical pole, and a base square hole is arranged on the side wall of the fixed ring.

[0015] Preferably, the long insulating connecting pipe comprises a long insulating pipe, an ear-shaped round joint and an ear-shaped square joint which are assembled at the two ends of the long insulating pipe, the ear-shaped round joint is connected and assembled with the assembly base plate of the pole fastening mechanism, and the ear-shaped square joint is inserted into the base square hole of the ladder fastening ring and connected and assembled.

[0016] Preferably, the hoop comprises a pole holding chain and a tightening adjuster, one end of the tightening adjuster is connected with the triangular support, the other end of the tightening adjuster is connected with one end of the pole holding chain, and the other end of the pole holding chain is connected with the triangular support.

[0017] Preferably, the tightening adjuster includes an adjusting bolt, an adjusting slider, and a handle. The adjusting slider is slidably mounted on the adjusting bolt, the handle is threadedly connected to the adjusting bolt, the end of the adjusting bolt is hinged to a triangular bracket, and the adjusting slider is connected to a retaining rod chain.

[0018] Preferably, the pole arm is provided with hard rubber, and the lower end of the lowest vertical pole is provided with a protective sleeve.

[0019] An installation method for a pole-mounted, double-pole insulated folding ladder includes the following steps:

[0020] S1. Before use, the main body of the double-pole insulated ladder and the pole fixing device are separated and stored separately. The main body of the double-pole insulated ladder is folded for easy handling.

[0021] S2. When using, first install the lifting device on the upper part of the pole, connect the electric hoist hook to the front horizontal bar of the double-pole insulated ladder body, operate the electric hoist to lift the double-pole insulated ladder body, and at the same time gradually unfold it from the folded state until it is completely straight.

[0022] S3. Starting from the bottom unit of the double-pole insulated climbing ladder, install the pole fixing device near the middle of the vertical pole of the climbing ladder unit. Use the remote control motor of the double worm gear to unscrew the two pole arms, put the pole into the pole arms, and then tighten the pole arms in the opposite direction to fix the pole fixing device horizontally on the pole.

[0023] S4. Insert the two ladder fastening rings of the pole fixing device into the middle of the vertical rod of the climbing ladder unit, tighten the wing nuts, and fix the double-pole insulated climbing ladder body to the pole, forming a stable triangular support structure.

[0024] S5. Lock the top of the double rods of the bottom ladder unit to the bottom of the adjacent ladder unit above using the fastener of the connector, and insert two quick-release safety pins into the side of the hinge for fixation and security.

[0025] S6. Repeat steps S3-S5 to complete the fixed connection between the ladder unit and the pole in sequence.

[0026] S7. During actual construction, the hook of the electric hoist is always kept in a suspended state to assist in the positioning and installation of the main body of the double-pole insulated ladder.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. The double-pole insulated folding ladder of the holding pole fixed type of the present application is particularly used in high-altitude power distribution network construction. The very long climbing ladder is set as a shorter climbing ladder unit. Before use, the climbing ladder unit is in a folded state, facilitating transportation and storage. When in use, the folded unit can be quickly unfolded through the hoisting device and fixed through the lock catch and the bolt. The climbing ladder unit can be increased or decreased according to the required height.

[0029] 2. The holding pole fixing device provided in the present application can realize automatic fixing of the holding pole at a long distance through the control of the motor. When in use, the bottom climbing ladder unit is fixed first, and then the fixing operation is sequentially performed upwards. The double-pole long insulating pole and the insulated ladder can form a stable triangular support structure, and the connection is stable. The folding ladder has high safety, is convenient and fast to install, can save a large amount of distribution network operation preparation time, has a wide range of use, and is almost not affected by the field operation environment.

[0030] 3. The double-pole insulated folding ladder of the holding pole fixed type in the present application uses light and high-strength insulating composite material for the folding ladder main body material and the long insulating pole. The personnel can be insulated and protected during live working, the safety of the folding ladder in use is improved, the application range is expanded, and good social and economic benefits are obtained. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more specifically and intuitively illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced as follows.

[0032] Figure 1 It is a structure schematic view of the completion installation of a holding pole fixed type double-pole insulated folding ladder of the embodiment of the present application.

[0033] Figure 2 It is a structure schematic view of a double-pole insulated climbing ladder main body in a folded state of a holding pole fixed type double-pole insulated folding ladder of the embodiment of the present application.

[0034] Figure 3 It is a structure schematic view of a climbing ladder unit of a holding pole fixed type double-pole insulated folding ladder of the embodiment of the present application.

[0035] Figure 4 It is a structure schematic view of a folding device of a holding pole fixed type double-pole insulated folding ladder of the embodiment of the present application in a fastening state.

[0036] Figure 5 It is a structure schematic view of two states of a quick detachable hinge of a holding pole fixed type double-pole insulated folding ladder of the embodiment of the present application.

[0037] Figure 6Structure schematic view of the electric pole fastening mechanism of a pole-holding fixed double-pole insulation folding ladder of an embodiment of the present application;

[0038] Figure 7 Structure schematic view of the electric pole fastening mechanism of a pole-holding fixed double-pole insulation folding ladder of an embodiment of the present application;

[0039] Figure 8 Structure schematic view of the long insulation connecting pipe of a pole-holding fixed double-pole insulation folding ladder of an embodiment of the present application;

[0040] Figure 9 Structure schematic view of the ladder-holding fastening ring of a pole-holding fixed double-pole insulation folding ladder of an embodiment of the present application;

[0041] Figure 10 Structure schematic view of the hoisting device of a pole-holding fixed double-pole insulation folding ladder of an embodiment of the present application;

[0042] Figure 11 Structure exploded schematic view of the tightening adjuster of a hoisting device of a pole-holding fixed double-pole insulation folding ladder of an embodiment of the present application;

[0043] Figure 12 Structure schematic view of a pole-holding fixed double-pole insulation folding ladder of an embodiment of the present application. Figure 7 Structure schematic view of a pole-holding fixed double-pole insulation folding ladder of an embodiment of the present application.

[0044] In the figure: 1: double-pole insulation ladder body;

[0045] 101: vertical pole; 102: horizontal pole; 103: male joint; 104: lower end hinge; 105: lock hook; 106: female joint; 107: upper end hinge; 108: lock; 109: bolt; 110: quick-release safety pin;

[0046] 2: pole-holding fixed device;

[0047] 21: electric pole fastening mechanism;

[0048] 211: pole-holding arm; 212: hard rubber; 213: remote control motor; 214: worm gear; 215: worm; 216: transmission pin shaft; 217: rotating shaft; 218: assembly base plate; 219: connecting plate; 2110: worm fixing plate; 2111: cover plate;

[0049] 22: long insulation connecting pipe;

[0050] 221: long insulation pipe; 222: ear-shaped round joint; 223: ear-shaped square joint;

[0051] 23: ladder-holding fastening ring;

[0052] 231: fixed ring; 232: movable ring; 233: pin shaft; 234: articulated bolt; 235: wing nut; 236: base square hole;

[0053] 3: hoisting device;

[0054] 301: hoop; 302: triangular support; 303: electric hoist; 304: chain; 305: tightening adjuster; 306: adjusting bolt; 307: adjusting slider; 308: handle;

[0055] 4: protective sleeve; 5: electric pole. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all.

[0057] Referring to Figures 1-12 A fixed double-pole insulating folding ladder of a holding pole, comprising a double-pole insulating ladder body 1, a holding pole fixing device 2 and a hoisting device 3, characterized in that the double-pole insulating ladder body 1 comprises a plurality of ladder units connected in a head-to-tail manner through connecting pieces, and the ladder units are in a folded state before use, facilitating transportation and storage.

[0058] The holding pole fixing device 2 comprises a long insulating connecting pipe 22, the two ends of the long insulating connecting pipe 22 are respectively connected with a pole fastening mechanism 21 and a ladder fastening ring 23, the ladder fastening ring 23 is used for connecting the double-pole insulating ladder body 1, and the pole fastening mechanism 21 is used for connecting an external electric pole.

[0059] The hoisting device 3 comprises a triangular support 302, the two ends of the triangular support 302 are respectively provided with a hoop 301 and an electric hoist 303, and the hoop 301 is used for connecting an external electric pole.

[0060] In the embodiment, the ladder unit comprises two vertical poles 101 and a plurality of horizontal poles 102, the horizontal poles 102 are equidistantly installed between the two vertical poles 101, and the end portions of the two adjacent vertical poles 101 are connected through connecting pieces.

[0061] In the embodiment, the connecting piece comprises a male connector 103 at the lower end of the vertical pole 101, a lower end hinge 104 and a lock hook 105, and a female connector 106 at the upper end of the vertical pole 101, an upper end hinge 107 and a lock 108, the lower end hinge 104 and the upper end hinge 107 are connected through a bolt 109, the lock hook 105 is clamped with the lock 108, the male connector 103 and the female connector 106 are both provided with corresponding pin holes, and a quick pull safety pin 110 is inserted in the pin hole.

[0062] In the embodiment, the electric pole fastening mechanism 21 comprises an assembly base plate 218, two worm fixing plates 2110 are arranged at the central position of the assembly base plate 218, a remote control motor 213 is arranged on the worm fixing plates 2110, a worm 215 is connected to the output end of the remote control motor 213, two rotating shafts 217 are symmetrically arranged at the two sides of the central position of the assembly base plate 218, a worm gear 214 and a pole arm 211 are arranged on each of the two rotating shafts 217, the worm gear 214 and the pole arm 211 are drivingly connected through a transmission pin shaft 216, the two worm gears 214 are engaged with the worm 215, a connecting plate 219 and a cover plate 2111 are arranged on the assembly base plate 218, the connecting plate 219 and the cover plate 2111 are assembled into a closed box, the remote control motor 213 drives the worm 215 to rotate, and drives the two worm gears 214 at the two sides to synchronously rotate in opposite directions, so that the pole arm 211 is opened and closed.

[0063] In the embodiment, the ladder fastening ring 23 comprises a fixed ring 231 and a movable ring 232, one end of the fixed ring 231 and the movable ring 232 is connected into a hinge structure through a pin shaft 233, the other end of the fixed ring 231 is assembled with a joint bolt 234, a butterfly nut 235 is threadedly connected to the joint bolt 234, the other end of the movable ring 232 is provided with a square opening, after the joint bolt 234 is sleeved into the square opening, the butterfly nut 235 is manually tightened, the ladder fastening ring 23 can clamp the vertical pole 101, and a base square hole 236 is arranged on the side wall of the fixed ring 231.

[0064] In the embodiment, the long insulation connecting pipe 22 comprises a long insulation pipe 221, and ear-shaped round joints 222 and ear-shaped square joints 223 assembled at the two ends of the long insulation pipe 221, the ear-shaped round joints 222 are connected and assembled with the assembly base plate 218 of the electric pole fastening mechanism 21, and the ear-shaped square joints 223 are inserted into the base square hole 236 of the ladder fastening ring 23 and connected and assembled.

[0065] In the embodiment, the hoop 301 comprises a pole arm chain 304 and a tightening adjuster 305, one end of the tightening adjuster 305 is connected with the triangular support 302, the other end of the tightening adjuster 305 is connected with one end of the pole arm chain 304, and the other end of the pole arm chain 304 is connected with the triangular support 302.

[0066] In the embodiment, the tightening adjuster 305 comprises an adjusting bolt 306, an adjusting sliding block 307 and a handle 308, the adjusting sliding block 307 is slidingly arranged on the adjusting bolt 306, the handle 308 is threadedly connected with the adjusting bolt 306, the end of the adjusting bolt 306 is hingedly connected with the triangular support 302, and the adjusting sliding block 307 is connected with the pole arm chain 304.

[0067] In the embodiment, hard rubber 212 is arranged on the pole arm 211, and a protective sleeve 4 is arranged at the lower end of the lowermost vertical pole 101.

[0068] A method for installing a double-pole insulated folding ladder fixed by a holding pole, comprising the following steps:

[0069] S1, before use, the double-pole insulated ladder body 1 and the holding pole fixing device 2 are in a separated state and are stored separately, and the double-pole insulated ladder body 1 is in a folded state, facilitating transportation;

[0070] S2, when in use, first install a hoisting device 3 on the upper part of the electric pole 5, connect the electric hoist 303 hook with the frontmost horizontal pole 102 of the double-pole insulated ladder body 1, and control the electric hoist 303 to hoist the double-pole insulated ladder body 1, while the folded state is gradually unfolded until it is completely in a straight line state;

[0071] S3, start from the bottom unit of the double-pole insulated ladder 1, install the holding pole fixing device 2 on the vertical pole 101 of the ladder unit near the middle position, remotely control the remote control motor 213 of the double worm gear, rotate open the two holding pole arms 211, put the electric pole 5 into the holding pole arms 211, and then reversely tighten the holding pole arms 211 to horizontally fix the holding pole fixing device 2 on the electric pole 5;

[0072] S4, put the two ladder fastening rings 23 of the holding pole fixing device 2 into the middle part of the vertical pole 101 of the ladder unit, tighten the wing nuts 235, realize the fixation of the double-pole insulated ladder body 1 and the electric pole 5, and form a stable triangular supporting structure;

[0073] S5, lock the double-pole top of the bottom ladder unit and the bottom end of the adjacent ladder unit above by the lock catch 108 of the connecting piece, and insert two quick pull safety pins 110 into the side of the hinge to fix and secure;

[0074] S6, repeat steps S3-S5 to sequentially complete the fixed connection of the ladder unit and the electric pole 5 upwards;

[0075] S7, during actual construction, the hook of the electric hoist 303 is always kept in a hoisting state to assist the positioning and installation of the double-pole insulated ladder body 1.

[0076] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A double pole insulated folding ladder of the guyed type comprising a double pole insulated ladder body (1), a guyed fixing device (2) and a hoisting device (3), characterized in that, The double-pole insulated ladder body (1) comprises a plurality of ladder units connected head to tail through connecting pieces, and the ladder units are in a folded state before use. The pole holding fixing device (2) comprises a long insulation connecting pipe (22), and the long insulation connecting pipe (22) is connected with a pole fastening mechanism (21) and a ladder fastening ring (23) at two ends respectively, the ladder fastening ring (23) is used for connecting the double-pole insulated ladder body (1), and the pole fastening mechanism (21) is used for connecting an external electric pole. The lifting device (3) comprises a triangular support (302), and the triangular support (302) is provided with a hoop (301) and an electric hoist (303) at two ends respectively, and the hoop (301) is used for connecting an external electric pole. The pole fastening mechanism (21) comprises an assembly bottom plate (218), and two worm fixing plates (2110) are arranged at the central axis position of the assembly bottom plate (218), a remote control motor (213) is arranged on the worm fixing plate (2110), a worm (215) is connected to the output end of the remote control motor (213), rotating shafts (217) are symmetrically arranged at the two sides of the central axis of the assembly bottom plate (218), a worm wheel (214) and a pole holding arm (211) are arranged on each rotating shaft (217), the worm wheel (214) and the pole holding arm (211) are in transmission connection through a transmission pin shaft (216), the two worm wheels (214) are in meshing connection with the worm (215), a connecting plate (219) and a cover plate (2111) are arranged on the assembly bottom plate (218), and the connecting plate (219) and the cover plate (2111) are assembled into a closed box body, the remote control motor (213) drives the worm (215) to rotate, and drives the worm wheels (214) at the two sides to rotate in opposite directions synchronously, so that the pole holding arm (211) is opened and closed.

2. The self-closing, double-rail, insulated, folding ladder of claim 1, wherein, The ladder unit comprises two vertical poles (101) and a plurality of horizontal poles (102), the horizontal poles (102) are equidistantly arranged between the two vertical poles (101), and the end portions of the two adjacent vertical poles (101) are connected through connecting pieces.

3. The self-supporting double-rail folding platform ladder of claim 2, wherein, The connecting piece comprises a male connector (103) at the lower end of the vertical pole (101), a lower end hinge (104) and a lock hook (105), a female connector (106) at the upper end of the vertical pole (101), an upper end hinge (107) and a lock (108), the lower end hinge (104) and the upper end hinge (107) are connected through a bolt (109), the lock hook (105) is in clamping connection with the lock (108), the male connector (103) and the female connector (106) are provided with corresponding pin holes, and a quick pull safety pin (110) is arranged in the pin hole.

4. The telescopic double pole folding ladder of claim 3, wherein, The ladder holding fastening ring (23) comprises a fixed ring (231) and a movable ring (232), one end of the fixed ring (231) and the movable ring (232) is connected by a hinge structure through a pin shaft (233), the other end of the fixed ring (231) is equipped with a joint bolt (234), the joint bolt (234) is threadedly connected with a butterfly nut (235), the other end of the movable ring (232) is provided with a square opening, after the joint bolt (234) is sleeved into the square opening, the butterfly nut (235) is manually screwed, the ladder holding fastening ring (23) can clamp the vertical pole (101), and the side wall of the fixed ring (231) is provided with a base square hole (236).

5. The self-supporting double-rail folding platform ladder of claim 4, wherein, The long insulation connecting pipe (22) comprises a long insulation pipe (221), and ear-shaped round joints (222) and ear-shaped square joints (223) assembled at two ends of the long insulation pipe (221), the ear-shaped round joints (222) are connected and assembled with the assembling bottom plate (218) of the electric pole fastening mechanism (21), and the ear-shaped square joints (223) are inserted into the base square hole (236) of the ladder holding fastening ring (23) and connected and assembled.

6. The self-supporting double-rail folding platform ladder of claim 5, wherein, The hoop (301) comprises a pole holding chain (304) and a tightening adjuster (305), one end of the tightening adjuster (305) is connected with the triangular support (302), the other end of the tightening adjuster (305) is connected with one end of the pole holding chain (304), and the other end of the pole holding chain (304) is connected with the triangular support (302).

7. The telescopic double pole folding ladder of claim 6, wherein, The tightening adjuster (305) comprises an adjusting bolt (306), an adjusting sliding block (307) and a handle (308), the adjusting sliding block (307) is slidably arranged on the adjusting bolt (306), the handle (308) is threadedly connected with the adjusting bolt (306), the end of the adjusting bolt (306) is hingedly connected with the triangular support (302), and the adjusting sliding block (307) is connected with the pole holding chain (304).

8. The telescopic double pole folding ladder of claim 7, wherein, Hard rubber (212) is arranged on the pole holding arm (211), and a protective sleeve (4) is arranged at the lower end of the vertical pole (101) located at the lowermost position.

9. The method of installing a fixed davit double pole insulated folding ladder of claim 8, wherein, The installation method comprises the following steps: S1, before use, the double-pole insulation ladder body (1) and the pole holding fixing device (2) are in a separated state and are stored separately, and the double-pole insulation ladder body (1) is in a folded state, so that the double-pole insulation ladder body (1) is convenient to carry; S2, when in use, the hoisting device (3) is first installed on the upper part of the electric pole (5), the electric hoist (303) hook is connected with the horizontal pole (102) at the front end of the double-pole insulation ladder body (1), the electric hoist (303) is controlled to hoist the double-pole insulation ladder body (1), and the double-pole insulation ladder body (1) is gradually unfolded until it is in a straight line state; S3, the pole holding fixing device (2) is installed on the vertical pole (101) of the ladder unit at a position close to the middle of the double-pole insulation ladder body (1) from the bottom unit of the double-pole insulation ladder body (1), the remote control motor (213) of the double worm gear is remotely controlled, the two pole holding arms (211) are rotated open, the electric pole (5) is sleeved into the pole holding arms (211), and the pole holding arms (211) are reversely tightened, so that the pole holding fixing device (2) is horizontally fixed on the electric pole (5). S4. Insert the two ladder fastening rings (23) of the pole fixing device (2) into the middle of the vertical rod (101) of the climbing unit, and tighten the wing nut (235) to fix the double-pole insulated climbing ladder body (1) to the pole (5) and form a stable triangular support structure. S5. Lock the top of the double rod of the bottom ladder unit to the bottom of the adjacent ladder unit above through the latch (108) of the connector, and insert two quick-release safety pins (110) into the side of the hinge for fixing and securing. S6. Repeat steps S3-S5 to complete the fixed connection between the climbing ladder unit and the pole (5) in sequence. S7. During actual construction, the hook of the electric hoist (303) is always kept in a hoisting state to assist in the positioning and installation of the main body (1) of the double-pole insulated ladder.

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