CN115596341A - Multi-person cooperation ladder for electric power overhaul - Google Patents

Abstract

The invention discloses a multi-person cooperation ladder for electric power overhaul. A first pulley is arranged on the outer side of the upper part of the first ladder post, and the lower part of the first pulley is connected with a second movable pulley through a string; a third pulley and a fourth pulley are arranged in the second ladder column; a first wire passing hole is formed in the side part, close to the first ladder post, of the cross rod of the first pulley, and a second wire passing hole corresponding to the first wire passing hole is formed in the left side of the cross rod; the third pulley is positioned at the left side of the second wire passing hole; the fourth pulley is positioned below the third pulley and close to the bottom cross rod; the axis of the fourth pulley is fixedly connected with a rotating shaft, the rotating shaft is connected with a handle, and the handle is positioned on the outer side of the second ladder column; a first fixed hook is arranged above the second movable pulley, and a second fixed hook is arranged below the second movable pulley; the second fixing hook is fixed with the tool box; the head of the thin rope is fixed with the first fixing hook, and the tail of the thin rope is fixed with the fourth pulley. The workman need not carry the power maintenance toolbox when climbing the ladder, and is very laborsaving, avoids the potential safety hazard.

Description

Multi-person cooperation ladder for electric power overhaul

Technical Field

The invention relates to the technical field of operation and maintenance of electric power equipment, in particular to a multi-person cooperation ladder for electric power overhaul.

Background

At present, electricity is indispensable energy in human life. In order to ensure a stable supply of power, a large number of power workers and maintenance tools are required for support. The power maintenance ladder is the most common tool, most of the power maintenance ladders in the prior art are the most common ladders, and most of the power maintenance ladders are treated in some insulation aspects.

CN 106382092B discloses a ladder and combination ladder belongs to the life instrument field, and this ladder includes two ladder bodies, a plurality of footboard and at least one connecting piece, and a plurality of footboard rotatable sets up between two ladder bodies, and the both ends of at least one ladder body are fixed respectively and are provided with the mounting, and the mounting of same ladder body is located its inboard, and the connecting piece is articulated with the footboard respectively, and the connecting piece slidable sets up in two mountings of same ladder body. The maintenance personal is difficult for carrying the instrument when climbing the ladder, easily drops when carrying the instrument, has the potential safety hazard.

CN211342736U discloses ladder for power cable maintenance, relate to power equipment maintenance technical field, including removing the base, first folding ladder, the second folding ladder, instrument desk and hoisting accessory, it includes two base pillars and a plurality of horizontal pole to remove the base, the horizontal pole sets up two base pillars of two base pillar intermediate connections, base pillar one end is equipped with anti-skidding landing leg, the regulation hole has been seted up on the base pillar, second folding ladder one end is connected with the first folding ladder other end, the instrument desk sets up the one side at the second folding ladder other end, hoisting accessory sets up the opposite side at the second folding ladder instrument desk one end, first folding ladder, second folding ladder and removal base are the aluminum alloy material. When the lifting platform is used for lifting objects, the lifting platform can only be operated by workers above the ladder, so that the lifting platform is labor-consuming in lifting the objects, and the climbing ladder is easy to shake and dump due to the force applied to the top of the climbing ladder.

Disclosure of Invention

In order to overcome the defects, the invention aims to provide the electric power overhaul multi-person matching ladder, the electric power maintenance toolbox is not required to be carried while the ladder is climbed, the toolbox can be put on the top of the ladder in advance by providing one third of pulling force of the toolbox, the labor is saved, and the potential safety hazard is avoided.

In order to realize the purpose, the invention adopts the following technical scheme:

a multi-person combined ladder for electric power overhaul comprises a first ladder column, a second ladder column and a plurality of cross rods; the first ladder post and the second ladder post are parallel to each other; the left end and the right end of the cross rod are respectively fixedly connected with two sides of the first ladder post and the second ladder post, and the cross rod is positioned between the first ladder post and the second ladder post; the first ladder post, the second ladder post and the cross rod are all hollow; a first pulley is arranged on the outer side of the upper part of the first ladder post, and the lower part of the first pulley is connected with a second movable pulley through a string; a third pulley and a fourth pulley are arranged inside the second ladder column; a first wire passing hole is formed in the side part, close to the first ladder post, of the cross rod, of the first pulley, the hole opening direction of the first wire passing hole is parallel to the length direction of the cross rod, and a second wire passing hole corresponding to the first wire passing hole is formed in the left side of the cross rod; the third pulley is positioned on the left side of the second wire passing hole; the fourth pulley is positioned below the third pulley and close to the bottom cross bar; the axis of the fourth pulley is fixedly connected with a rotating shaft, the rotating shaft is connected with a handle, and the handle is positioned on the outer side of the second ladder post; a first fixed hook is arranged above the second movable pulley, and a second fixed hook is arranged below the second movable pulley; the second fixing hook is fixed with the tool box, and a power maintenance tool is placed in the tool box; the head of the thin rope is fixed with the first fixing hook, and the tail of the thin rope is fixed with the fourth pulley; the string passes through the first fixed hook, the left side of the first pulley, the right side of the second movable pulley, the left side of the second movable pulley, the first wire passing hole, the cross bar, the second wire passing hole, the left side of the third pulley and the fourth pulley from head to tail respectively.

Optionally, the first wire passing hole and the second wire passing hole are arranged on the uppermost cross bar; the fourth pulley and the handle are arranged at a position 50cm-100cm away from the bottom of the second ladder post.

Optionally, the bottom of the first wire passing hole is provided with an arc shape, and the arc corresponds to the direction of the string; the center of the second wire through hole and the center of the first wire through hole are on the same horizontal line; the aperture size of the second wire passing hole is consistent with that of the first wire passing hole; the first wire passing hole and the second wire passing hole are not in contact with the bottom surface of the cross rod.

Optionally, the first pulley is fixedly connected with the front side and the rear side of the first ladder post through two fixing plates; the fixing plates are trapezoidal and are respectively positioned at the front side and the rear side of the first pulley; the top positions of the two fixing plates correspond to each other and are movably connected with the axis of the first pulley, and the bottoms of the fixing plates are fixedly connected with the front side and the rear side of the first ladder post through screws.

Optionally, the axes of the two sides of the second movable pulley are movably connected with the center of the fixed frame; the fixing frame is in an annular rectangular shape, a through hole is formed in the center of the fixing frame, and the second movable pulley is located in the through hole; the first fixing hook is fixed at the center of the top of the fixing frame; the number of the second fixing hooks is two, and the second fixing hooks are respectively fixed on two sides of the bottom of the fixing frame and are arranged in a shaft symmetry mode; the tool box is rectangular, a rectangular groove is formed in the center of the tool box, ear plates are arranged on the front portion and the rear portion of the tool box, and the ear plates are connected with fixing ropes.

Optionally, the axle centers of two sides of the third pulley are respectively movably connected with two second fixing plates, and the two second fixing plates are respectively fixed at the front and rear parts of the second ladder post; the rotating shafts on two sides of the fourth pulley are movably connected with the left part and the right part; and the outer rotating shaft of the fourth pulley is L-shaped, one end of the outer rotating shaft is fixedly connected with the center of the left side of the fourth pulley, and the other end of the outer rotating shaft is connected with the handle.

Optionally, two limiting holes are formed in the outer side of the second ladder post corresponding to the handle, and the two limiting holes are symmetrically distributed by taking the fourth pulley rotating shaft as the center; the handle comprises a hand holding part and a limiting part; the hand holding part is larger than the width of the limiting part; one end of the limiting part is fixedly connected with the hand holding part, and the other end of the limiting part corresponds to the limiting hole in shape and size; the limiting part is provided with a limiting boss, and the limiting boss is larger than the limiting hole in size.

Optionally, the top of the first ladder post is movably connected with a telescopic post, the telescopic post is in a long strip shape, and the direction of the telescopic post is consistent with the length direction of the first ladder post; the telescopic column is hollow, first observation holes are arranged at positions corresponding to the front face and the rear face of the first ladder column, and a first plane mirror is fixed inside each first observation hole; a second observation hole is arranged at the lower part of the first ladder post, and corresponds to the first observation hole in position; a second plane mirror is fixed inside the second observation hole; the first plane mirror is at an angle of 45 degrees and faces the first observation hole and the second plane mirror; the second plane mirror is at an angle of 45 degrees and faces the first plane mirror and the second observation hole.

Optionally, the horizontal cross-sectional shapes of the first ladder post and the second ladder post are square; the horizontal cross section of the telescopic column is circular; two side parts of the telescopic column close to the top are provided with limiting cylinders, and the top of the first ladder column is provided with a limiting circular groove; the limiting cylinder corresponds to the limiting circular groove in size and position.

Optionally, a first convex lens arranged in the horizontal direction is fixed between the first plane mirror and the second plane mirror, and the arrangement position of the first convex lens is close to the second lookout hole; the second lookout hole external connection eyepiece, set up the correspondence in the eyepiece the second convex lens or the first concave lens of first convex lens, the second convex lens or the vertical direction setting of first concave lens.

In order to ensure the stable supply of electric power, need a large amount of electric power workers and repair tools to support, the repair tools weight that the workman carried when maintaining may be great, when the cat ladder, generally need a hand horizontal pole, the toolbox is embraced to the other hand, it is very unstable to the balance of self, it falls off from the ladder or the toolbox falls off from the ladder very probably to follow, and still can consume a large amount of physical power of self, the maintenance efficiency of power equipment is not enough influenced to physical power, a maintenance point probably needs to change the position of cat ladder many times and climb up, climb the ladder from top to bottom if frequently embracing the toolbox, it is tired, can fall down with the carelessness down slightly, serious potential safety hazard has. When many people cooperate the maintenance, some power maintenance tools or power tool that are difficult to carry too much can not all take to go up at first, reuse when needing, need the workman under the ladder to submit maintenance tool for the workman on the ladder this time, and the workman has probably because the losing hand landing falls to on the ground or the lower workman on one's body in frequent handing over process, causes the instrument to damage or personnel to injure.

The invention has the following positive beneficial effects:

1) When climbing a ladder, a power maintenance tool box is not needed to be carried, so that potential safety hazards are avoided;

2) The power maintenance tool box is lifted to the position near the top of the ladder in advance, so that the power maintenance tool box is convenient to take and use during working;

3) The multifunctional auxiliary ladder is suitable for being operated by multiple persons, and a person who is positioned below the ladder and performs auxiliary work can put a temporarily needed maintenance tool into the tool box and then lift the tool box to the top of the ladder for the person above to take; the electric tool is very convenient, and can not fall off due to the falling of the hands when two persons hand off, thereby avoiding hitting people or damaging tools;

4) The tool box can be put on the top of the ladder in advance by only providing a pull force of one third of the weight of the tool box, so that the physical strength is greatly saved;

5) The ladder cannot shake integrally;

6) The hidden property of each pulley and the transmission string is better, and the beauty is improved

7) Is convenient to disassemble and carry.

Drawings

Fig. 1 is a schematic structural view of an orthographic vertical section of an electric power overhaul multi-person cooperation ladder provided in embodiment 1 of the present invention;

FIG. 2 is an enlarged view of circle A of FIG. 1 in accordance with the present invention;

fig. 3 is an external structural schematic view of an electric power overhaul multi-person cooperation ladder provided in embodiment 1 of the present invention;

fig. 4 is a schematic structural view of an orthographic vertical section of the electric power overhaul multi-person cooperation ladder provided by the embodiment 2 of the invention;

fig. 5 is an external structural schematic view of an electric power overhaul multi-person cooperation ladder provided in embodiment 2 of the present invention;

fig. 6 is a partial structural schematic view of a cylindrical telescopic column provided in embodiment 2 of the present invention;

fig. 7 is a schematic front vertical cross-sectional view of a first ladder column provided in embodiment 2 of the present invention.

1. A first ladder column; 2. a second ladder post; 3. a cross bar; 4. a first pulley; 41. a fixing plate; 5. a second movable pulley; 51. a first fixed hook; 52. a second fixed hook; 53. a fixed mount; 6. a third pulley; 61. A second fixing plate; 7. a fourth pulley; 8. a first wire passing hole; 9. a second wire passing hole; 10. a handle; 101. A hand holding part; 102. a limiting part; 11. a tool box; 111. an ear plate; 12. a string; 13. an outer rotating shaft of the fourth pulley; 14. a limiting hole; 15. a limiting boss; 16. a telescopic column; 17. a first watchhole; 18. A first plane mirror; 19. a second watchhole; 20. a second plane mirror; 21. a limiting cylinder; 22. a limiting circular groove; 23. a first convex lens; 24. an eyepiece; 25. a second convex lens; 26. a first concave lens.

Detailed Description

The invention will be further described with reference to some specific embodiments.

Example 1

As shown in fig. 1 to 3, an electric power overhaul multi-person cooperation ladder comprises a first ladder column 1, a second ladder column 2 and a plurality of cross bars 3; the first ladder post 1 and the second ladder post 2 are parallel to each other; the left end and the right end of the cross rod 3 are respectively fixedly connected with two sides of the first ladder post 1 and the second ladder post 2, and the cross rod 3 is positioned between the first ladder post 1 and the second ladder post 2; the first ladder post 1, the second ladder post 2 and the cross rod 3 are hollow; a first pulley 4 is arranged on the outer side of the upper part of the first ladder post 1, and the lower part of the first pulley 4 is connected with a second movable pulley 5 through a string 12; a third pulley 6 and a fourth pulley 7 are arranged inside the second ladder column 2; a first wire passing hole 8 is formed in the side portion, close to the first ladder post 1, of the cross rod 3, of the first pulley 4, the hole opening direction of the first wire passing hole 8 is parallel to the length direction of the cross rod 3, and a second wire passing hole 9 corresponding to the first wire passing hole 8 is formed in the left side of the cross rod 3; the third pulley 6 is positioned at the left side of the second wire passing hole 9; the fourth pulley 7 is positioned below the third pulley 6 and close to the bottom cross bar 3; the axis of the fourth pulley 7 is fixedly connected with a rotating shaft, the rotating shaft is connected with a handle 10, and the handle 10 is positioned on the outer side of the second ladder post 2; a first fixed hook 51 is arranged above the second movable pulley 5, and a second fixed hook 52 is arranged below the second movable pulley; the second fixing hook 52 is fixed with the tool box 11, and a power maintenance tool is placed in the tool box 11; the head of the string 12 is fixed to the first fixing hook 51, and the tail of the string 12 is fixed to the fourth pulley 7; the string 12 passes through the first fixed hook 51, the left side of the first pulley 4, the right side of the second movable pulley 5, the left side of the second movable pulley 5, the first thread passing hole 8, the crossbar 3, the second thread passing hole 9, the left side of the third pulley 6, and the fourth pulley 7 from head to tail, respectively.

A plurality of tools need to be carried for power maintenance or repair, if a single person carries out power maintenance work, all tools can be placed into the tool box 11 or a tool box carried with the person is placed into the tool box 11, the fourth pulley 7 is rotated by shaking the rotating handle 10, so that the thin rope 12 is driven to move, and the third pulley 6 is used for reducing the friction force borne by the thin rope 12 and reducing the force; first pulley 4 mainly bears 11 weights of most toolboxes, and ascending power is applyed to second movable pulley 5 to common three-section of string 12, and maintenance person only need provide 11 third of toolbox pulling force with the in-process that toolbox 11 promoted can, very laborsaving can not lead to the ladder whole to rock, and it is spacing to twine many rings produced frictional force through string 12 and fourth pulley 7 again, prevents that toolbox 11 from gliding. If many people carry out power maintenance work, the people that is located the ladder below can put into toolbox 11 with the maintenance tool of interim needs, rotates handle 10 again, sends toolbox 11 to the ladder top, and need not climb to the ladder on, or the people on the ladder climb down and take, and is very convenient, can not drop because of taking off the hand when handing over power tool moreover, avoids the potential safety hazard.

Specifically, the first wire through hole 8 and the second wire through hole 9 are arranged on the uppermost cross rod 3, the tool box 11 can be lifted to the position of the cross rod 3 by rotating the handle 10 to the highest degree, even if a maintenance worker is positioned at the uppermost part of the ladder, the tool box 11 is approximately positioned slightly above the thigh side of the worker, and the worker can easily take the tool box by hanging down the hand; the fourth pulley 7 and the handle 10 are disposed at a distance of 50cm-100cm from the bottom of the second ladder post 2 so that the user does not crouch down or stoop down when turning the handle 10 to raise or lower the height of the toolbox 11. The distance between the adjacent cross rods 3 is 20cm-30cm, the heights of the first ladder column 1 and the second ladder column 2 are generally 350cm-500cm, so that the number of the cross rods 3 is about twenty, the cross rods 3 in the attached drawings are not completely shown in order to improve the size and the definition of the attached drawings, and the structure, the matching mode and the operation principle of the head and the tail of the multi-person power overhaul matching ladder are mainly highlighted.

The bottom of the first wire passing hole 8 is in an arc shape, the arc corresponds to the direction of the thin rope 12, so that the friction force between the thin rope 12 and the cross rod 3 is reduced when the thin rope 12 is pulled to move, the material of the thin rope 12 can be smooth, wear-resistant and firm steel wire ropes, nylon ropes and polypropylene ropes, and the first ladder column 1, the second ladder column 2 and the cross rod 3 are made of glass fiber reinforced plastics, aluminum alloy and the like, so that the ladder is firm, insulating, light in weight and convenient to carry; the center of the second wire through hole 9 and the center of the first wire through hole 8 are on the same horizontal line; the aperture size of the second wire through hole 9 is consistent with that of the first wire through hole 8; the first wire through hole 8 and the second wire through hole 9 are not in contact with the bottom surface of the cross rod 3, so that friction with the bottom of the cross rod 3 is avoided.

The first pulley 4 is fixedly connected with the front side and the rear side of the first ladder post 1 through two fixing plates 41, and the two fixing plates 41 are axisymmetric from front to rear by taking the first pulley 4 as a center; the fixing plates 41 are trapezoidal and are respectively positioned at the front side and the rear side of the first pulley 4; the top positions (the width is shorter) of two fixed plates 41 correspond to each other, and with the axle center pivot swing joint of first pulley 4, the junction can set up the convenient pivoted miniature bearing, the bottom (the width of fixed plate 41 is longer) with both sides pass through screw fixed connection around first ladder post 1 for first pulley 4 can't rock first ladder post 1 relatively.

The axes of the two sides of the second movable pulley 5 are movably connected with the center of the fixed frame 53; the fixed frame 53 is in an annular rectangular shape, a through hole is formed in the center of the fixed frame, and the second movable pulley 5 is located in the through hole, so that the second movable pulley 5 can rotate relatively in the fixed frame 53, and the friction force between the second movable pulley and the thin rope 12 is reduced; the first fixing hook 51 is fixed at the center of the top of the fixing frame 53 and is used for being fixed with the head of the thin rope 12, and the head of the thin rope 12 can be provided with a circular knot which extends into the first fixing hook 51 so as to be convenient to detach at any time; the number of the second fixing hooks 52 is two, and the two second fixing hooks are respectively fixed at two sides of the bottom of the fixing frame 53 and are arranged in a shaft symmetry manner; 11 shapes of toolbox are the rectangle, and 11 length direction of toolbox are unanimous with the fore-and-aft direction of cooperation ladder, and the center is provided with direction rectangular channel up, and anterior and rear portion's edge sets up otic placode 111, and otic placode 111 is located 11 anterior and rear portion's central point of toolbox and puts, fixed rope is connected to otic placode 111, fixed rope is used for hanging on the second fixed hook 52.

The axle centers of the two sides of the third pulley 6 are movably connected with two second fixing plates 6141 respectively, and the two second fixing plates 6141 are fixed at the front and rear parts of the second ladder post 2 respectively; the rotating shafts on the two sides of the fourth pulley 7 are movably connected with the left part and the right part; the shape of the outside pivot 13 of fourth pulley is the L type, one end with the left side center fixed connection of fourth pulley 7, the other end with handle 10 is connected can fixed connection also can swing joint, and swing joint more facilitates the use of handle 10, and handle 10 not only can rotate together along with the pivot, still can self rotate, rotates along with user's hand. The center joints of all the pulleys can be provided with corresponding bearings.

Referring to fig. 2, two limiting holes 14 are formed in the outer side of the second ladder post 2 corresponding to the handle 10, and the two limiting holes 14 are symmetrically distributed around the rotating shaft of the fourth pulley 7; the handle 10 comprises a hand-holding part 101 and a limiting part 102; the width of the hand holding part 101 is larger than that of the limiting part 102; one end of the limiting part 102 is fixedly connected with the hand holding part 101, the other end of the limiting part 102 corresponds to the shape and size of the limiting hole 14, the limiting part 102 can extend into the limiting hole 14, so that the hand holding part 101 is limited to rotate, when the tool box 11 rises to the position near the highest position or in the middle part, the limiting part 102 can extend into the limiting hole 14 for limiting, and the tool box 11 can be kept stable in the air after being released; the limiting portion 102 is provided with a limiting boss 15, the limiting boss 15 is larger than the size of the limiting hole 14, the limiting portion 102 is prevented from extending into the limiting portion, and meanwhile the limiting boss 15 can also limit the handle 10 and cannot be separated from the rotating shaft.

Example 2

As shown in fig. 4 to 7, the top of the first ladder post 1 is not sealed, the top of the first ladder post 1 is movably connected with a telescopic post 16, the telescopic post 16 is long and has the same direction as the length direction of the first ladder post 1, the telescopic post 16 can be freely lifted or lowered in the length direction of the first ladder post 1, when in use, a maintenance worker on the ladder can hold the top of the telescopic post 16 to pull the telescopic post up, so that the length of the telescopic post 16 is increased, and the length of the telescopic post 16 after being put down is not more than that of the top cross bar 3; the telescopic column 16 is hollow, first observation holes 17 are arranged at positions corresponding to the front face and the rear face of the first ladder column 1, and a first plane mirror 18 is fixed inside the first observation holes 17; a second observation hole 19 is formed in the lower part of the first ladder post 1, and the second observation hole 19 corresponds to the first observation hole 17 in position; a second plane mirror 20 is fixed inside the second observation hole 19; the first plane mirror 18 is at an angle of 45 degrees and faces the first lookout hole 17 and the second plane mirror 20; the second planar mirror 20 is angled at 45 deg. towards the first planar mirror 18 and the second observation aperture 19.

Along with the vigorous implementation of the smart grid technology, power maintenance often involves multiple fields, complex circuits are arranged in a power cabinet, multiple fields such as machinery, electric control and software debugging are involved, and the maintenance often needs multiple workers in multiple fields or the same field to participate simultaneously, share business volume, provide schemes and cooperate maintenance. When the power equipment is maintained in some indoor narrow spaces, if a plurality of power ladders cannot be placed at the same time, workers need to climb the ladders in turn to analyze or maintain the conditions in the power equipment, the operation is very troublesome, the ladder is unsafe to frequently climb up and down, and the communication and maintenance work among the workers can be difficult.

The ladder is certainly placed in front of or behind and provides a supporting point when in use, and under the condition that the telescopic column 16 and the first ladder column 1 are both rectangular, the first lookout hole 17 is arranged at the front and back of the first ladder column 1, so that the first lookout hole 17 faces the direction of power equipment to be overhauled conveniently. Light rays reflected by the overhauled power equipment pass through the first plane mirror 18 and are reflected to the second plane mirror 20 by the first plane mirror 18, the light rays are reflected out in a direction parallel to the second observation hole 19 by the second plane mirror 20, other workers below the ladder can see the situation of the power equipment located at a high position in the second observation hole 19, and workers on the ladder can adjust the height of the telescopic column 16 to control a picture displayed at the second observation hole 19.

The bottoms of the first flat mirror 18 and the second flat mirror 20 are fixedly supported by snap plates or buckles fixed inside the telescopic column 16 and the first ladder column 1. In the embodiment 1, the first ladder post 1 is hollow inside and only has one thin rope 12, so that the observation and guidance are not affected when a worker looks at the second observation hole 19 under the ladder, and the main structure of the power equipment can be displayed.

Further, referring to fig. 6, the horizontal cross-sectional shapes of the first ladder post 1 and the second ladder post 2 are square; the horizontal cross section of the telescopic column 16 is circular; the diameter of the horizontal cross section of the telescopic column 16 is slightly smaller than the side length of the horizontal cross section of the second ladder post 2, so that the telescopic column 16 can not only move up and down, but also rotate left and right to adjust the angle, and the view field range of the first lookout hole 17 is improved; two side parts of the telescopic column 16 close to the top are provided with limiting cylinders 21, and the top of the first ladder column 1 is provided with a limiting circular groove 22; the size and the position of the limiting cylinder 21 correspond to those of the limiting circular groove 22. After the observation is finished, the telescopic column 16 can be placed on the top of the first ladder column 1 to be fixed and can not fall all the way under the influence of gravity.

Referring to fig. 7, a first convex lens 23 is fixed between the first plane mirror 18 and the second plane mirror 20, and the first convex lens 23 is positioned close to the second observation hole 19; the eyepiece 24 is connected to the outside of second observation hole 19, set up in the eyepiece 24 and correspond second convex lens 25 or first concave lens 26 of first convex lens 23, second convex lens 25 or the vertical direction setting of first concave lens 26. Setting the positions of a convex lens and a concave lens according to the principle of a telescope; the method has the function of amplifying the power equipment, and improves the definition and the accuracy of command participation. First convex lens 23 is equivalent to objective, according to observing the distance, can set up convex lens or concave lens in eyepiece 24, and eyepiece 24 can adjust the distance in second convex lens 25 or first concave lens 26 and the second observation hole 19 to adjust the focus of eyepiece 24 and objective, improve the definition. The eyepiece 24 can be detached from the second observation hole 19, and the second convex lens 25 or the first concave lens 26 with different curvatures or multiples can be replaced at any time for matching.

Because the flexible post 16 of top internal connection of first ladder post 1, look out hole 19's definition in order to improve ladder overall structure intensity or improve the second, the shape of first ladder post 1 and second ladder post 2, length and size are the same, the cross section size of first ladder post 1 and second ladder post 2 can suitably increase, the inner space is left sufficient, the flexible post 16 cross section that corresponds also suitably increases, the size of looking out hole 17 first also increases, be equivalent to the bore that improves the objective, improve bottom workman's observation effect. The bottom of the first ladder post 1 and the second ladder post 2 and the top of the cross rod 3 are provided with anti-skid pads, so that the anti-skid property of the ladder is improved. Can adopt solid post or inside packing and fixed counterweight in the inside below of second ladder post 2 in order to improve the weight of second ladder post 2, can improve the stability of ladder when the too much instrument in toolbox 11, reduce and stabilize the focus, prevent to promote toolbox 11 and make the ladder topple over to the direction of first ladder post 1 when no one on the ladder.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A multi-person combined ladder for electric power overhaul is characterized by comprising a first ladder column, a second ladder column and a plurality of cross rods; the first ladder post and the second ladder post are parallel to each other; the left end and the right end of the cross rod are respectively fixedly connected with two sides of the first ladder post and the second ladder post, and the cross rod is positioned between the first ladder post and the second ladder post; the first ladder post, the second ladder post and the cross rod are hollow; a first pulley is arranged on the outer side of the upper part of the first ladder post, and the lower part of the first pulley is connected with a second movable pulley through a string; a third pulley and a fourth pulley are arranged inside the second ladder column; a first wire passing hole is formed in the side part, close to the first ladder post, of the cross rod, of the first pulley, the hole opening direction of the first wire passing hole is parallel to the length direction of the cross rod, and a second wire passing hole corresponding to the first wire passing hole is formed in the left side of the cross rod; the third pulley is positioned on the left side of the second wire passing hole; the fourth pulley is positioned below the third pulley and close to the bottom cross rod; the axis of the fourth pulley is fixedly connected with a rotating shaft, the rotating shaft is connected with a handle, and the handle is positioned on the outer side of the second ladder post; a first fixed hook is arranged above the second movable pulley, and a second fixed hook is arranged below the second movable pulley; the second fixing hook is fixed with the tool box, and a power maintenance tool is placed in the tool box; the head of the thin rope is fixed with the first fixing hook, and the tail of the thin rope is fixed with the fourth pulley; the string passes through the first fixed hook, the left side of the first pulley, the right side of the second movable pulley, the left side of the second movable pulley, the first wire passing hole, the cross bar, the second wire passing hole, the left side of the third pulley and the fourth pulley from head to tail respectively.

2. An electric power overhaul multi-person cooperation ladder as claimed in claim 1, wherein the first and second wire passing holes are provided on the uppermost cross bar; the fourth pulley and the handle are arranged at a position 50cm-100cm away from the bottom of the second ladder post.

3. The electric power overhaul multi-person cooperation ladder as claimed in claim 1, wherein the bottom of the first wire passing hole is provided in a shape of an arc corresponding to the direction of the string; the center of the second wire through hole and the center of the first wire through hole are on the same horizontal line; the aperture size of the second wire passing hole is consistent with that of the first wire passing hole; the first wire through hole and the second wire through hole are not contacted with the bottom surface of the cross rod.

4. The electric power overhaul multi-person cooperation ladder as claimed in claim 1, wherein the first pulley is fixedly connected with the front and rear sides of the first ladder column through two fixing plates; the fixing plates are trapezoidal and are respectively positioned at the front side and the rear side of the first pulley; the top positions of the two fixing plates correspond to each other and are movably connected with the axis of the first pulley, and the bottoms of the fixing plates are fixedly connected with the front side and the rear side of the first ladder post through screws.

5. The electric power overhaul multi-person cooperation ladder as claimed in claim 1, wherein the axes of the two sides of the second movable pulley are movably connected with the center of the fixed frame; the fixing frame is in an annular rectangular shape, a through hole is formed in the center of the fixing frame, and the second movable pulley is located in the through hole; the first fixing hook is fixed at the center of the top of the fixing frame; the number of the second fixing hooks is two, and the second fixing hooks are respectively fixed on two sides of the bottom of the fixing frame and are arranged in a shaft symmetry mode; the tool box is rectangular, a rectangular groove is formed in the center of the tool box, ear plates are arranged on the front portion and the rear portion of the tool box, and the ear plates are connected with fixing ropes.

6. An electric power overhaul multi-person combined ladder as claimed in claim 1, wherein the axes of the two sides of the third pulley are movably connected with two second fixing plates respectively, and the two second fixing plates are fixed at the front and rear parts of the second ladder posts respectively; the rotating shafts on two sides of the fourth pulley are movably connected with the left part and the right part; and the outer rotating shaft of the fourth pulley is L-shaped, one end of the outer rotating shaft is fixedly connected with the center of the left side of the fourth pulley, and the other end of the outer rotating shaft is connected with the handle.

7. An electric power overhaul multi-person cooperation ladder as claimed in claim 6, wherein two limiting holes are provided at the outer side of the second ladder post corresponding to the handle, and the two limiting holes are symmetrically distributed around the fourth pulley rotating shaft; the handle comprises a hand holding part and a limiting part; the hand holding part is larger than the width of the limiting part; one end of the limiting part is fixedly connected with the hand holding part, and the other end of the limiting part corresponds to the limiting hole in shape and size; the limiting part is provided with a limiting boss, and the limiting boss is larger than the limiting hole in size.

8. An electric power overhaul multi-person cooperation ladder as claimed in claim 1, wherein the top of the first ladder post is movably connected with a telescopic post, the telescopic post is long and the direction of the telescopic post is consistent with the length direction of the first ladder post; the telescopic column is hollow, a first observation hole is arranged at a position corresponding to the front face and the rear face of the first ladder column, and a first plane mirror is fixed inside the first observation hole; a second observation hole is arranged at the lower part of the first ladder column, and corresponds to the position of the first observation hole; a second plane mirror is fixed inside the second observation hole; the first plane mirror is at an angle of 45 degrees and faces the first observation hole and the second plane mirror; the second plane mirror is at an angle of 45 degrees and faces the first plane mirror and the second observation hole.

9. The electric power overhaul multi-person cooperation ladder of claim 8, wherein the horizontal cross-sectional shape of the first ladder leg and the second ladder leg is square; the horizontal cross section of the telescopic column is circular; two side parts of the telescopic column close to the top are provided with limiting cylinders, and the top of the first ladder column is provided with a limiting circular groove; the limiting cylinder corresponds to the limiting circular groove in size and position.

10. An electric power overhaul multi-person cooperation ladder as claimed in claim 8, wherein a first convex lens is fixed between the first plane mirror and the second plane mirror, and the first convex lens is arranged close to the second observation hole; the second lookout hole external connection eyepiece, set up the correspondence in the eyepiece the second convex lens or the first concave lens of first convex lens, the second convex lens or the vertical direction setting of first concave lens.

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