CN106848925B - High-voltage operation folding ladder - Google Patents

Abstract

The invention provides a high-voltage working folding ladder. The folding ladder includes folding handrails, two fixed handrails and two pressure equalizing balls. The folding handrails are located at the upper end of the fixed handrails; wherein, the ends of the high-voltage operation folding ladder are respectively connected with the ground and the detection and maintenance device; the folding handrails include a beam and two armrest brackets; the first ends of the two armrest brackets are connected by a beam, and the second ends are detachably connected with two pressure equalizing balls; the length of the beam is greater than the distance between the two fixed armrests; the two armrest brackets They are placed on both sides of the two fixed handrails and are rotatably connected to the two fixed handrails; when the line is running, the beam is in contact with the fixed handrails; when the line is maintained, the beam is in contact with the detection and maintenance device. When the folding ladder of the invention is running on the line, the beam blocks children or suicides from climbing, the pressure equalizing ball increases the curvature radius of the top of the folding ladder, and solves the problem of corona discharge at the top of the high-voltage working ladder in a high-voltage environment.

Description

High voltage work folding ladder

technical field

The invention relates to the technical field of electric power maintenance, in particular to a high-voltage operation folding ladder.

Background technique

Ladders are often required when working at heights near high-voltage lines or in high-voltage environments. At high voltage, near the electrode with a small radius of curvature around the electric field, discharge will occur due to free air, forming a corona. Because the electric field around the corona is very weak and no collision and dissociation occurs, the charged particles around the corona are basically ions, and these ions form the corona discharge current. Due to the high voltage in the working area above the ladder, corona discharge often occurs at the top of the ladder with a small radius of curvature. When the corona discharge occurs, not only the halo light is produced, but also the sound of the discharge, so the corona discharge will cause the loss of electric energy and interfere with the TV broadcast.

In addition, in order to facilitate the climbing of the ladder and the protection of personnel, fixed handrails are provided on both sides of the existing ladder. However, the fixed handrail also facilitates the climbing of other people. In a high-voltage environment, there is a danger of electric shock when people approach, thus causing personal injury to children or suicide.

SUMMARY OF THE INVENTION

In view of this, the present invention proposes a high-voltage working folding ladder, which aims to solve the problems of corona discharge and insecurity at the top of the existing ladder.

In one aspect, the present invention provides a high-voltage operation folding ladder, the device comprising: a folding handrail, two fixed handrails and two pressure equalizing balls, the folding handrails are located at the upper end of the fixed handrails; wherein, the high The ends of the voltage operation folding ladder are respectively connected with the ground and the detection and maintenance device; the folding handrail includes a beam and two handrail brackets; wherein, the first ends of the two handrail brackets are connected through the beam, and, The second ends are detachably connected to the two pressure equalizing balls respectively; the length of the beam is greater than the distance between the two fixed armrests; the two armrest brackets are respectively placed on the two fixed armrests The two sides of the rail are rotatably connected with the two fixed handrails; when the line is running, the beam is in contact with the two fixed handrails to prevent people from climbing; when the line is repaired, the beam is in contact with the two fixed handrails. It is in contact with the detection and maintenance device and is used for supporting the armrest bracket.

Further, the above-mentioned armrest bracket includes: an armrest frame and a support frame; wherein, one end of the armrest frame is rotatably connected to the fixed armrest, and the other end of the armrest frame is connected to the pressure equalizing ball Removably connected; one end of the support frame is rotatably connected to the joint between the armrest frame and the fixed armrest, and the other end of the support frame is fixedly connected to the beam.

Further, the armrest bracket includes: a first bracket, a second bracket and an armrest bracket; wherein, the first end of the first bracket and the first end of the second bracket are connected, and the first bracket The second end of the armrest is connected with the armrest; the second end of the second support is connected with the first end of the armrest, and the first support, the second support and the armrest The frame is surrounded by a triangle; the second end of the armrest frame is placed outside the triangle and is detachably connected with the pressure equalizing ball; the beam is fixedly connected to the first bracket and the second bracket bracket connection.

Further, the pressure equalizing ball is provided with a groove matching the second end of the armrest frame; the second end of the armrest frame is clamped in the groove.

Further, the pressure equalizing ball is a hollow sphere, and the pressure equalizing ball is provided with an opening that matches the second end of the armrest frame; the second end of the armrest frame passes through the opening and is sleeved on the armrest frame. inside the pressure equalizing sphere.

Further, the above-mentioned opening is a circular hole with a diameter larger than that of the second end of the armrest frame.

Further, the pressure equalizing ball is connected to the fixed handrail through a connecting piece, and the connecting piece is used for fixing the pressure equalizing ball.

Further, the above-mentioned connector is a lead wire.

Further, the above-mentioned lead rope is a steel wire rope, a steel stranded wire rope, a steel core aluminum stranded wire rope or a copper wire rope.

Further, the above-mentioned cross beam is detachably connected with the detection and maintenance device through a bolt.

In the high-voltage operation folding ladder provided by the present invention, when the line is running, the folding handrail is rotated until the cross beam is in contact with the fixed handrail. It solves the insecurity problem caused by high-voltage working ladders. At the same time, the pressure equalizing ball is connected to the top tip of the high-voltage operation folding ladder, which increases the curvature radius of the top part of the high-voltage operation folding ladder, and solves the problem of corona discharge at the top of the high-voltage operation ladder in a high-voltage environment.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating preferred embodiments only and are not to be considered limiting of the invention. Also, the same components are denoted by the same reference numerals throughout the drawings. In the attached image:

Fig. 1 is the side structure schematic diagram of the high-voltage operation folding ladder provided by the embodiment of the present invention during high-voltage operation;

FIG. 2 is a schematic diagram of the front structure of the high-voltage operation folding ladder provided by the embodiment of the present invention during high-voltage operation;

Fig. 3 is the side structure schematic diagram of the high-voltage operation folding ladder provided by the embodiment of the present invention during line maintenance;

4 is a schematic diagram of the front structure of the high-voltage operation folding ladder during line maintenance provided by an embodiment of the present invention;

5 is a schematic structural diagram of a pressure equalizing ball in a high-voltage operation folding ladder according to an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Referring to FIG. 1 , FIG. 1 is a schematic side structure diagram of the high-voltage operation folding ladder provided by the embodiment of the present invention when the high-voltage operation is performed. As shown in the figure, the high-voltage operation folding ladder includes: a folding handrail 1 , two fixed handrails 2 and two pressure equalizing balls 3 , and the folding handrail 1 is located at the upper end of the fixed handrail 2 (relative to the position shown in FIG. 1 ) ). It is well known to those skilled in the art that the high-voltage operation folding ladder also includes a ladder body, and the ladder body can be placed vertically (relative to the position shown in FIG. 1 ), or can be placed obliquely (relative to the position shown in FIG. 1 ) ), which is not limited in this embodiment. Two fixed handrails 2 are welded on the lower ends of both sides of the ladder body (relative to the position shown in FIG. 1 ). The folding armrest 1 is located at the upper end of the two fixed armrests 2 (relative to the position shown in FIG. 1 ) and is rotatably connected to the two fixed armrests 2 . Preferably, the pressure equalizing ball 3 may be a metal ball. Further preferably, the pressure equalizing ball 3 may be an aluminum ball, a stainless steel ball or an iron ball. Of course, the pressure equalizing ball 3 may also be a sphere of other materials, which is not limited in this embodiment. in,

As shown in Figures 1 to 4, the ends of the high-voltage operation folding ladder are respectively connected to the ground and the detection and maintenance device. Specifically, the bottom end (relative to the position shown in FIG. 1 ) of the high-voltage operation folding ladder, that is, the bottom end of the ladder body (relative to the position shown in FIG. 1 ) is connected to the ground, and the high-voltage operation folds The top end of the ladder (relative to the position shown in FIG. 1 ), that is, the top end of the ladder body (relative to the position shown in FIG. 1 ) is connected to the inspection and maintenance device. In order to further enhance the safety and stability of the folding ladder, preferably, the connection between the folding ladder and the ground and the bottom surface of the inspection and maintenance device may be welding. It is well known to those skilled in the art that the detection and maintenance device may be a corona cage, or may be other devices when an operator is working in a high-voltage environment.

The folding armrest 1 includes: a cross beam 11 and two armrest brackets 12 . Wherein, the first ends of the two armrest brackets 12 (the lower right end as shown in FIG. 1 ) are connected by the beam 11 , and the second ends of the two armrest brackets 12 (the upper right end as shown in FIG. 1 ) are respectively connected with The two pressure equalizing balls 3 are detachably connected. Specifically, the beam 11 can be placed horizontally (relative to the position shown in FIG. 2 ), the two armrest brackets 12 can be placed vertically (relative to the position shown in FIG. 2 ), and the two armrest brackets 12 can pass through The beams 11 are connected. The handrail bracket 12 and the beam 11 can be integrally formed. Of course, the connection method of the handrail bracket 12 and the beam 11 can also be other connection methods known to those skilled in the art, such as welding, which is not limited in this embodiment. The second ends of the two armrest brackets 12 (the upper right end as shown in FIG. 1 ) are detachably connected to the two pressure equalizing balls 3 respectively. When the line is repaired, the two pressure equalizing balls 3 are removed and placed. During operation, the two pressure equalizing balls 3 are connected with the second ends of the two handrail brackets 12 (the upper right end shown in FIG. 1 ).

The length of the beam 11 is greater than the distance between the two fixed handrails 2 . The two armrest brackets 12 are respectively placed on both sides of the two fixed armrests 2 and are rotatably connected to the two fixed armrests 2 . Specifically, the horizontal length of the beam 11 (relative to the position shown in FIG. 2 ) may be greater than the horizontal distance between the two fixed handrails 2 (relative to the position shown in FIG. 2 ), and the two handrail brackets 12 are respectively placed on the left and right sides of the two fixed handrails 2 (relative to the position shown in FIG. 2 ), and the two handrail brackets 12 can be rotatably connected to the two fixed handrails 2 through fastener bolts Of course, the connection between the two armrest brackets 12 and the two fixed armrests 2 may also be connected by other means known to those skilled in the art, such as connecting rods, which are not limited in this embodiment.

As shown in Figures 1 to 2, when the line is running, the beam 11 is in contact with the two fixed handrails 2 for preventing people from climbing. Specifically, when the line is running, the cross beam 11 is in contact with the two fixed handrails 2, the fixed handrails 2 can support the folding handrail 1 to prevent it from rotating, and the cross beam 11 can prevent personnel from climbing along the folding ladder to the dangerous area of the inspection and maintenance device . At the same time, at this time, the two pressure equalizing balls 3 are connected with the second ends of the two armrest brackets 12 .

As shown in FIGS. 3 to 4 , when the line is maintained, the beam 11 is in contact with the detection and maintenance device, and is used to support the handrail bracket 12 . Specifically, after the line stops running and before line maintenance, after removing the two pressure equalizing balls 3 and placing them in other positions, the folding armrest 1 rotates around the connection between the two fixed armrests 2 and the two armrest brackets 12 , and rotates to the beam 11 . Contact with inspection and maintenance device. When the line is repaired, the beam 11 is in contact with the detection and maintenance device, and the detection and maintenance device can support the folding handrail 1 to prevent it from rotating.

The working process of this embodiment is as follows: firstly, rotate the folding armrest 1 until the beam 11 contacts the fixed armrest 2, and then connect the two pressure equalizing balls 3 to the second ends of the two armrest brackets 12 (as shown in the upper right of FIG. 1). In this state, the line runs; when the line needs to be repaired, the line stops running. First, connect the two pressure equalizing balls 3 to the second ends of the two handrail brackets 12 (the upper right end as shown in Figure 1) Separate and place them in other positions, and then turn the folding armrest 1 counterclockwise (relative to the direction shown in FIG. 1 ) around the first end of the two armrest brackets 12 (the lower right end as shown in FIG. 1 ), and turn to the beam 11 After being in contact with the detection and maintenance device (the state shown in Figure 4), the maintenance personnel can climb and then repair the line.

Compared with the prior art, in the high-voltage operation folding ladder provided in this embodiment, when the line is running, the folding handrail 1 is rotated until the cross beam 11 is in contact with the fixed handrail 2, and the cross beam 11 can prevent children or suicides from climbing, reducing The possibility of electric shock around the high-voltage line is eliminated, and the insecurity problem caused by the high-voltage working ladder is solved. At the same time, the pressure equalizing ball 3 is connected to the top tip of the high-voltage operation folding ladder, which increases the curvature radius of the top part of the high-voltage operation folding ladder, and solves the problem of corona discharge at the top of the high-voltage operation ladder in a high-voltage environment.

In one implementation of this embodiment, the armrest bracket 12 may include: an armrest frame and a support frame; wherein, one end of the armrest frame may be rotatably connected to the fixed armrest 2, and the other end of the armrest frame may be connected to the The pressure balls 3 are detachably connected. One end of the support frame can be rotatably connected with the joint between the handrail frame and the fixed handrail 2 , and the other end of the support frame can be fixedly connected with the beam 11 .

In a specific implementation, each handrail bracket includes a handrail bracket and a support bracket, and the folding ladder includes two handrail brackets, that is, the folding ladder includes a total of two handrail brackets and two support brackets. One end of the two armrests can be rotatably connected to the two fixed armrests 2 respectively, and the other end can be detachably connected to the two pressure equalizing balls 3 respectively. One end of the two support frames can be respectively rotatably connected with the connection between the armrest frame and the fixed armrest 2 and the connection between the other armrest frame and the fixed armrest 2 . Preferably, in order to facilitate replacement and disassembly, the connection between one end of the support frame and the handrail frame and the fixed handrail 2 can be connected by bolts. The other ends of the two support frames can be fixedly connected with the beam 11, the support frame and the beam 11 can be integrally formed, and of course other connection methods known to those skilled in the art, such as welding, are not limited in this embodiment. .

It can be seen that in this embodiment, the handrail frame of the handrail bracket 12 can increase the length of the handrail, and when the maintenance personnel climbs to the top of the folding ladder, a climbable handrail is added, which increases the safety of the maintenance personnel, and the beam When 11 is in contact with the fixed handrail 12, that is, after the folding ladder is folded, there is no handrail at the top, which can further prevent children or suicides from climbing to the dangerous area in the detection and maintenance device. At the same time, the rotatable connection between the handrail frame and the support frame is convenient for installation and transportation.

Only referring to FIGS. 1 to 4 , in another implementation of this embodiment, the armrest bracket 12 may include: a first bracket 121 , a second bracket 122 and an armrest bracket 123 . Specifically, the two armrest brackets 12 on the left and right sides (relative to the position shown in FIG. 2 ) may each include a first bracket 121 , a second bracket 122 and an armrest bracket 123 . in,

The first end of the first bracket 121 (the lower end shown in FIG. 1 ) can be connected to the first end of the second bracket 122 (the upper right end shown in FIG. 1 ), and the second end of the first bracket 121 (the upper end shown in FIG. 1 ) can be connected with the armrest frame 123 . The second end of the second bracket 122 (the lower left end shown in FIG. 1 ) can be connected with the first end of the armrest frame 123 (the lower left end shown in FIG. 1 ), and the first bracket 121 , the second bracket 122 and the armrest frame 123 can enclose a triangle. Specifically, the first bracket 121 , the second bracket 122 and the armrest frame 123 are connected in two phases to form a triangle. In order to further increase the strength, preferably, the first end of the first bracket 121 (the lower end as shown in FIG. 1 ) and the first end of the second bracket 122 (the upper right end as shown in FIG. 1 ) are set to form a right angle .

The second end of the armrest frame 123 (the upper right end shown in FIG. 1 ) can be placed outside the triangle and can be detachably connected with the pressure equalizing ball 3 , and the beam 11 can be fixedly connected to the first bracket 121 and the second bracket 122 . Junction.

Preferably, the left end of the beam 11 (relative to the position shown in FIG. 2 ) can be fixedly connected to the first bracket 121 and the second bracket 122 of the left armrest bracket 12 (relative to the position shown in FIG. 2 ) At the connection point, the right end of the beam 11 (relative to the position shown in FIG. 2 ) can be fixedly connected to the first bracket 121 and the second bracket of the right handrail bracket 12 (relative to the position shown in FIG. 2 ) 122 connection. During specific implementation, the first bracket 121 , the second bracket 122 and the armrest bracket 123 may be integrally formed, and of course other connection methods known to those skilled in the art such as welding, which are not limited in this embodiment.

In this embodiment, when the line is repaired, not only the beam 11 is in contact with the detection and maintenance device to support the handrail bracket 12 , but also the second bracket 122 can support the handrail frame 123 to reduce the climbing force on the beam 11 . At the same time, the first bracket 121 , the second bracket 122 and the handrail bracket 123 of the handrail bracket 12 are encircled into a triangle, which increases the strength of the handrail bracket 11 and thus increases the service life of the folding ladder.

In one implementation of the above embodiments, the pressure equalizing ball 3 may be provided with a groove matching the second end of the armrest frame 123 (the upper right end shown in FIG. 2 ), and the second end of the armrest frame 123 ( The upper right end shown in Figure 2) can be snapped into the groove. In order to further increase the stability of the pressure equalizing ball 2, the groove opened by the pressure equalizing ball 2 is matched with the second end of the armrest frame 123 (the upper right end shown in FIG. 2 ). The upper right end shown in 2) is a cylinder, and the groove opened by the pressure equalizing ball 2 can be a circular groove that matches the outer diameter of the above-mentioned cylinder, and the inner diameter of the circular groove can be the same as the outer diameter of the above-mentioned cylinder. The same or slightly larger than the outer diameter of the above cylinder.

It can be seen that in this embodiment, the structure and connection method of the pressure equalizing ball 3 and the second end of the armrest frame 123 are simple in structure and easy to implement, and the pressure equalizing ball 3 is easy to disassemble and install.

Referring to FIG. 5 , FIG. 5 is a schematic structural diagram of a pressure equalizing ball in a high-voltage operation folding ladder according to an embodiment of the present invention. In another implementation of the above embodiment, as shown in the figure, the pressure equalizing ball 3 is a hollow sphere, and the pressure equalizing ball 3 is provided with an opening 31 that matches the second end of the armrest frame 123 , and the armrest frame 123 The second end of the ball is inserted through the opening 31 and sleeved in the pressure equalizing ball 3 . For simplicity of manufacture, preferably, the pressure equalizing ball 3 may be a hollow sphere with a uniform wall thickness.

In this embodiment, if the pressure equalizing ball 3 is a hollow sphere, not only can the pressure equalizing ball 3 be stably connected to the second end of the armrest frame 123 , but also material and manufacturing costs can be saved.

Further, in the above embodiment, the opening 31 may be a circular hole with a diameter larger than that of the second end of the armrest frame 123 . Specifically, the opening 31 may be a circular hole, and the diameter of the circular hole may be larger than the outer diameter of the second end of the armrest frame 123 . However, the present invention is not limited thereto, and in other embodiments, the opening 31 may have other suitable shapes, such as a square hole and the like.

In the above embodiments, the pressure equalizing ball 3 is connected to the fixed handrail 2 through the connecting member 4 , and the connecting member 4 is used for fixing the pressure equalizing ball 3 . In specific implementation, the folding ladder may include two connecting pieces, one end of each connecting piece may be connected with a fixed handrail 2 respectively, and the other end of the connecting piece 4 may be connected with a pressure equalizing ball 4 respectively. Wherein, the connecting member 4 may be a telescopic rod member or a bendable plastic member, which is not limited in this embodiment. During line maintenance, the two pressure equalizing balls 3 can be separated from the second end of the armrest bracket 123 (the upper right end shown in FIG. 1 ), and hung on both sides of the two fixed armrests 2 through the connecting piece 4 .

It can be seen that in this embodiment, the pressure-equalizing ball 3 and the folding handrail 1 can be directly hung on the fixed handrail 2 after being disassembled, so the folding ladder can prevent the pressure-equalizing ball 3 from being lost, and at the same time, can prevent the pressure-equalizing ball 3 from appearing. Unsafe accidents caused by rolling.

Further, the connecting member 4 may be a lead wire. Specifically, one end of the lead rope can be tied to the fixed handrail 2 , and the other end can be inserted into the pressure equalizing ball 3 . In order to prevent the pressure equalizing ball 3 from falling, preferably, the lead wire can be a metal wire. Further preferably, the lead wire rope can be a steel wire rope, a steel strand rope, a steel core aluminum stranded wire rope or a copper wire rope. Of course, the lead rope can also be a rope made of other materials, which is not limited in this embodiment. In this embodiment, the connecting piece 4 can be bent at will, and its length can also be changed at will, so the connecting piece 4 is easy to install, and the position of the pressure equalizing ball 4 can be adjusted when the line is repaired.

In the above-mentioned embodiments, the beam 11 can be detachably connected to the inspection and maintenance device through a latch. Specifically, when the line is repaired, the plug is inserted, and the beam 11 is connected to the detection and maintenance device; when the line is repaired, after the plug is pulled out, the beam 11 can be separated from the detection and maintenance device. In this embodiment, during line maintenance, the arrangement of the latch can further stabilize the fixed connection between the beam 11 and the detection and maintenance device, and can prevent the beam 11 from driving the folding handrail 1 to shake.

The following is a more detailed description of the high-voltage operation folding ladder provided by the embodiment of the present invention.

As shown in FIGS. 1 to 5 , the folding ladder includes a ladder body, a folding handrail 1 , two fixed handrails 2 , two pressure equalizing balls 3 and two connecting pieces 4 . Wherein, the pressure equalizing ball 3 is a hollow sphere with uniform wall thickness, its outer diameter can be 200-500mm, and its wall thickness can be 1-10mm, preferably, its outer diameter and wall thickness decibels are 400mm and 5mm, and the bottom (relative to In the direction shown in Figure 5), a circular hole is opened. The ladder body can be a straight ladder or an inclined ladder, two fixed handrails 2 are arranged on the lower end of the ladder body, and a folding handrail 1 is arranged on the upper end of the fixed handrails. The folding armrest 1 includes two armrest brackets 12 and a cross beam 11 , and the armrest bracket 12 includes a first bracket 121 , a second bracket 122 and an armrest bracket 123 . In order to comprehensively consider the cost and foldability of the folding handrail, the length of the handrail frame 123 is 0.5-1.7 m, preferably, the length of the handrail frame 123 is 1 m. The first bracket 121 , the second bracket 122 and the armrest frame 123 are connected in sequence to form a right triangle, and the second end of the armrest frame 123 (the upper right end as shown in FIG. 1 ) is placed outside the triangle. The ends of the beam 11 are fixedly connected to the connection between the first bracket 121 and the second bracket, and the connection between the first bracket 121 and the armrest frame 123 is rotatably connected to the fixed armrest 2 . The diameter of the circular hole opened by the pressure equalizing ball 3 is 1-50 mm larger than the outer diameter of the third bracket. Preferably, the diameter of the circular hole opened by the pressure equalizing ball 3 is 30 mm larger than the outer diameter of the third bracket, and the second The end (the upper right end as shown in FIG. 1 ) passes through the circular hole and is placed in the pressure equalizing ball 3 . The pressure-equalizing ball 3 can be connected to the fixed handrail 2 through the connecting piece 4. When the line is maintained, the pressure-equalizing ball 4 is suspended on both sides of the ladder body through the connecting piece 4. The two ends (the upper right end shown in Figure 1) are connected. In order to sufficiently bear the weight of the pressure equalizing ball, the connecting member 4 can be a steel wire rope with a diameter of 1-10 mm, a steel strand rope, a steel core aluminum stranded wire rope or a copper wire rope, preferably, a steel wire rope with a diameter of 5 mm. The corona cage is 70m long and consists of two cages with a cross-section of 10m×10m. There are 2 layers of intermediate nets between the two cages. The corona cage is arranged in a catenary structure, and the distance between the cages at both ends is about 100 m from the ground. When the height is 3m, for safety and stability, the corona cage is provided with 4 high-voltage operation folding ladders arranged at 60° to the bottom surface. The beam 11 is fixed and separated from the corona cage by means of latches.

To sum up, in the high-voltage operation folding ladder provided in this embodiment, when the line is running, the contact between the beam 11 and the fixed handrail 2 can prevent children or suicides from climbing, and reduce the possibility of electric shock around the high-voltage line , to solve the problem of insecurity caused by high-voltage working ladders. At the same time, the pressure equalizing ball 3 is connected to the top tip of the high-voltage operation folding ladder, which increases the curvature radius of the top part of the high-voltage operation folding ladder, and solves the problem of corona discharge at the top of the high-voltage operation ladder in a high-voltage environment.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (9)

1. A high voltage operation folding ladder, comprising: the foldable handrail (1) is positioned at the upper end of the fixed handrail (2); wherein,

the end part of the high-voltage operation folding ladder is respectively connected with the ground and the detection and maintenance device;

the folding handrail (1) comprises a cross beam (11) and two handrail supports (12); wherein the first ends of the two armrest supports (12) are connected through the cross beam (11), and the second ends are respectively detachably connected with the two pressure equalizing balls (3);

the length of the cross beam (11) is greater than the distance between the two fixed armrests (2);

the two handrail supports (12) are respectively arranged on two sides of the two fixed handrails (2) and are rotatably connected with the two fixed handrails (2);

when the line runs, the cross beam (11) is in contact with the two fixed handrails (2) and is used for blocking people from climbing;

when the line is maintained, the cross beam (11) is in contact with the detection and maintenance device and is used for supporting the handrail support (12).

2. High voltage service stepladder according to claim 1, characterized in that the handrail support (12) comprises: a first bracket (121), a second bracket (122) and an armrest frame (123); wherein,

a first end of the first bracket (121) is connected with a first end of the second bracket (122), and a second end of the first bracket (121) is connected with the armrest frame (123);

the second end of the second bracket (122) is connected with the first end of the handrail frame (123), and the first bracket (121), the second bracket (122) and the handrail frame (123) enclose a triangle;

the second end of the armrest frame (123) is arranged outside the triangle and is detachably connected with the pressure equalizing ball (3);

the cross beam (11) is fixedly connected to the joint of the first bracket (121) and the second bracket (122).

3. The high voltage service attic ladder of claim 2,

the pressure equalizing ball (3) is provided with a groove matched with the second end of the armrest frame (123);

the second end of the armrest frame (123) is clamped in the groove.

4. The high voltage service attic ladder of claim 2,

the pressure equalizing ball (3) is a hollow ball body, and the pressure equalizing ball (3) is provided with an opening (31) matched with the second end of the armrest frame (123);

the second end of the armrest frame (123) penetrates through the opening (31) and is sleeved in the pressure equalizing ball (3).

5. A high voltage operating ladder according to claim 4, wherein the opening (31) is a circular hole with a diameter larger than the diameter of the second end of the handrail frame (123).

6. A high voltage service attic ladder as claimed in any one of claims 1 to 5,

the pressure equalizing ball (3) is connected with the fixed handrail (2) through a connecting piece (4), and the connecting piece (4) is used for fixing the pressure equalizing ball (3).

7. A high voltage operating stepladder according to claim 6, wherein the connection (4) is a lead wire.

8. The high voltage operating attic ladder of claim 7, wherein the lead wire rope is a wire rope, a steel strand wire rope, a steel-reinforced aluminum strand wire rope, or a copper wire rope.

9. A high voltage service attic ladder as claimed in any one of claims 1 to 5, wherein said cross member (11) is detachably connected to said service detection device by means of a latch.

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