CN104533277A - Adjustable soft ladder for power transmission line - Google Patents

Abstract

The invention relates to a flexible ladder connector for high-altitude operation of power transmission lines, in particular to an adjustable ladder head for power transmission lines. There are fixed ladder columns and movable ladder columns. The upper part of the fixed ladder columns is hollow, and a plurality of through holes are distributed in the axial direction. The movable ladder columns are located in the hollow inner cavity of the fixed ladder columns, and can be relatively fixed. Move up and down to adjust the length of the adjustable ladder column end, and finally fix it with a latch. The main point is that the upper end of the ladder column of the soft ladder head can be adjusted in height. Hanging a ladder on the overhead line with a large height difference in the transmission line span can lower the high ladder column, so that the two pulleys at the head of the soft ladder can be hung into the overhead line without falling off. The height of the soft ladder head can be adjusted arbitrarily according to the height difference of the span of the overhead line, so it is easy to operate, high in safety and good in reliability.

Description

Adjustable soft ladder head for transmission line

technical field

The invention relates to a flexible ladder connector for high-altitude operation of a power transmission line, in particular to an adjustable soft ladder head of a power transmission line.

Background technique

In the transmission line, the operation of the overhead line usually requires the use of a ladder. The end of the ladder is called the ladder head. The soft ladder head in the prior art adopts ladder columns of equal height, and is fixed on the line by binding or sliding hooking and other methods. Its shortcoming is that, first of all, the feature of equal-height ladder columns will inevitably require lines to provide equal-height positions to facilitate connection and installation, which limits the use conditions of the soft ladder and cannot be used according to needs, which brings great inconvenience ; In addition, once there is a unequal height position with excessive height difference, one side of the soft ladder head will easily fall off from the overhead line, which will bring great personal safety hazards to the operators.

Contents of the invention

The object of the present invention is to provide an adjustable soft ladder head for transmission lines with convenient operation, high safety and good reliability according to the shortcomings of the prior art.

The purpose of the present invention is achieved by the following approach:

The key point of the structure of the adjustable soft ladder head of the transmission line is that it includes two adjustable ladder columns and a pulley device. Each adjustable ladder column includes a fixed ladder column and a movable ladder column. The upper part of the fixed ladder column is hollow. And there are a plurality of through-holes distributed along the axial direction. The movable ladder column is located in the hollow inner cavity of the fixed ladder column and can move up and down relative to the fixed ladder column. The pin hole corresponding to the through hole, when the through hole on the fixed ladder column corresponds to the pin hole on the movable ladder column, the pin can be inserted to connect and fix the fixed ladder column and the movable ladder column; at the upper end of the movable ladder column The part is fixedly equipped with a pulley device, and the pulley device includes a half-enclosed inverted U-shaped frame with an opening downward and a pulley installed in the frame; the lower end of the fixed ladder column is connected to the working ladder.

Before use, according to the working position of the transmission line, calculate the height difference between the two ends of the soft ladder head that needs to be hung, and then adjust the position of the movable ladder column in the cavity of the fixed ladder column, thereby adjusting the length of the adjustable ladder column end, and finally Fastened with pins. When in use, put the opening side of the pulley device close to the transmission line at the working position, and make the transmission line enter the inverted U-shaped frame from the opening, and the frame leans against the pulley below to realize the connection between the adjustable ladder head and the line. The gist of the present invention is that the upper end of the ladder column of the soft ladder head can be adjusted in height. Hanging the ladder on the overhead line of the transmission line with a large height difference can lower the high ladder column so that the two pulleys at the head of the soft ladder can be hung into the overhead line without falling off. The height of the soft ladder head can be adjusted arbitrarily according to the height difference of the span of the overhead line, so it is easy to operate, high in safety and good in reliability.

The present invention can further specifically be:

Also includes a manual brake device, which includes a brake handle, a brake block and a spring pin, the spring pin is installed in the inner cavity of the wheel shaft of the pulley, and the brake blocks are symmetrically installed on the two sides of the pulley on the corresponding inverted U-shaped frame. One end is hinged with the upper end surface of the inverted U-shaped frame, the movable end of the spring pin is positioned on the other end side of the brake block, and the brake handle is connected to the fixed end of the spring pin.

When in use, the brake handle is pulled to press the spring pin to the brake block, and further the brake block is pressed to the direction of the pulley, and under the friction of the brake block, the braking effect is realized. Thereby, it can be ensured that the ladder head will not slide down when hanging on the overhead wire with large height difference, and the operator can also move the ladder to the working position through the manual brake device and then fix the ladder head.

It also includes a movable sliding sleeve, which includes a movable frame, a guide rod and a hook-shaped door. The movable frame is composed of four sets, two pedals and two compression springs to form a quadrilateral frame, and two sets of left and right are respectively inserted through it. On the lower side of the fixed ladder column, it is the four vertices of the quadrilateral frame, and the two pedals are the upper side and the lower side of the quadrilateral frame respectively. On the left and right of the left and right sides, the compression spring is located between the two sets of the same fixed ladder column; a guide rod is installed on the outside of the two sets of the same fixed ladder column, the lower part of the guide rod runs through the two sets, and the upper part is connected with the hook-shaped sealing door; The hook-shaped door is an L-shaped rod, one end of which is connected to the upper part of the guide rod, and then extends from one side plate of the inverted U-shaped frame to the other side plate according to the L shape, and seals and closes the opening of the inverted U-shaped frame. , the other end of the L-shaped bar is hooked and connected with the other side plate of the inverted U-shaped frame.

When in use, the operator can step on the upper side of the movable frame to make the upper side close to the lower side under the elastic force of the compression spring, and at the same time drive the guide rod to pull down, further driving the L-shaped rod as the door seal to swing, thus Pull the side plate of the inverted U-shaped frame and press it to the pulley in the middle to realize the braking effect and control the soft ladder head from slipping. In this way, when the operator cannot manually brake and fix due to operation requirements, he can use the foot brake. On the other hand, while the brake is fixed, the inverted U-shaped frame can also be closed to prevent the adjustable soft ladder head from jumping off the wire during use, and improve the safety and operational reliability of operators.

To sum up, the present invention provides an adjustable soft ladder head for power transmission lines. The main point is that the height of the upper end of the ladder column of the soft ladder head can be adjusted. Hanging the ladder on the overhead line of the transmission line with a large height difference can lower the high ladder column so that the two pulleys at the head of the soft ladder can be hung into the overhead line without falling off. The height of the soft ladder head can be adjusted arbitrarily according to the height difference of the span of the overhead line, so it is easy to operate, high in safety and good in reliability.

Description of drawings

Fig. 1 is a schematic structural diagram of the adjustable soft ladder head of the transmission line according to the present invention.

Figure 2 is a left side view of Figure 1. In particular, due to making the composition clearer, only the braking device on the short end side is shown in Fig. 1 and Fig. 2, and the high-end movable ladder column side also has the same hand brake and door sealing structure, but it is not shown in the figure.

The present invention will be further described below in combination with specific embodiments.

Detailed ways

Best practice:

With reference to accompanying drawing 1 and Fig. 2, the adjustable soft ladder head of power transmission line includes two adjustable ladder columns, pulley device manual braking device and movable sliding sleeve. Each adjustable ladder column includes a fixed ladder column 1 and a movable ladder column 2. The upper part of the fixed ladder column 1 is hollow, and a plurality of through holes 3 are distributed along the axial direction. The movable ladder column 2 is located on the fixed ladder column. In the hollow cavity of the ladder column 1, it can move up and down relative to the fixed ladder column 1. At the same time, the movable ladder column 2 is axially distributed with pin holes 4 corresponding to the through holes on the fixed ladder column 1. When the fixed ladder column 1 When the through hole of the through hole corresponds to the pin hole on the movable ladder column 2, the latch can be inserted, thereby connecting and fixing the fixed ladder column 1 and the movable ladder column 2. The lower end of the fixed ladder column 1 is the lower end ring, which is used to connect the working ladder. A waist protection device 16 is provided on the soft ladder head, which is connected with the fixed ladder column 1 . The top end of the movable ladder column 2 is provided with a clamping plate 17 for fixing the soft ladder head on the overhead line.

A pulley device is fixedly installed on the upper end of the movable ladder column 2, and the pulley device includes a half-enclosed inverted U-shaped frame with an opening downward and a pulley 5 installed in the frame; the inverted U-shaped frame includes left and right side plates 6 and upper The end face 7 and the axle of the pulley 5 are hollow, and run through the left and right side plates 6 of the inverted U-shaped frame. The left side panel 6 of the inverted U-shaped frame is inclined from the top of the movable rod to the upper left, then vertically upwards, and the vertical upward section is parallel to the movable ladder column. At this time, the central axis of the pulley 5 coincides with the central axis of the movable ladder column 2 , and the inclined section of the left side plate 6 provides the lead-in function for hanging the overhead line.

The manual brake device includes a brake handle 8, a brake block 9 and a spring pin 10, the spring pin 10 is installed in the inner cavity of the wheel shaft of the pulley 5, and the brake block 9 is symmetrically installed on the left and right side plates of the inverted U-shaped frame corresponding to the two sides of the pulley 5 6, the upper end of the brake block 9 is hinged with the upper end face 7 of the inverted U-shaped frame, the movable end of the spring pin 10 is positioned on the lower side of the brake block 9, and the brake handle 8 is connected to the fixed end of the spring pin 10.

The movable sliding sleeve includes a movable frame, a guide rod 11 and a hooked door 12. The movable frame is composed of four sets 13, two pedals 14 and two compression springs 15 to form a quadrilateral frame, of which there are 13 sets of two sets on the left and right. Wear on the lower side of two fixed ladder columns 1, which are the four vertices of the quadrilateral frame, and the two pedals 14 are respectively the upper and lower sides of the quadrilateral frame, and the two ends of the pedals 14 are fixedly connected with the left and right sleeves 14 respectively, and the two Two compression springs 15 are respectively the left side and the right side of the quadrilateral frame, and the compression springs 15 are located between the two sets of the same fixed ladder column; guide rods 11 are installed outside the two sets of fixed ladder columns 1, and the guide rod 11 bottoms run through Two kits, the upper part is connected with the hook-shaped door 12; the hook-shaped door 12 is an L-shaped rod, one end is connected with the upper part of the guide rod 11, and then according to the structural characteristics of the L-shaped, first left along the inverted U-shaped frame The inclined section of the side plate extends and is parallel to the inclined section, and then turns vertically to the right and extends to the right side plate of the inverted U-shaped frame. The hanging points provided on the side panels hook to seal the opening of the inverted U-frame closed.

The adjustable soft ladder head of the present invention has two functions: one, the height of the upper end of the ladder column of the soft ladder head can be adjusted. Hanging the ladder on the overhead line of the transmission line with a large height difference can lower the high ladder column so that the two pulleys at the head of the soft ladder can be hung into the overhead line without falling off. The height of the soft ladder head can be adjusted arbitrarily according to the height difference of the span of the overhead line. 2. Set the brake device on the side of the ladder head wheel. The device can ensure that the soft ladder head will not slide down when hanging on the overhead line with large height difference. The operator fixes the head of the ladder after moving the ladder to the working position through the brake device. 1. Tighten the two rubber brakes on the side of the wheel quickly by operating the handle, so as to clamp the wire to play a braking role. 2. By stepping on the movable sliding sleeve by the operator, the spring is stretched to drive the brake block to press the wire, increase the friction with the wire, and control the soft ladder head from sliding forward.

The parts not described in the present invention are the same as the prior art.

Claims (3)

1. the adjustable rope ladder head of transmission line of electricity, it is characterized in that, include two adjustable cleat stanchions and pulley gear, every root is adjustable, and cleat stanchion all includes fixing cleat stanchion and movable cleat stanchion, the upper portion hollow of fixing cleat stanchion, and be distributed with the through hole that a plurality of transverse direction runs through vertically, movable cleat stanchion is arranged in the hollow cavity of fixing cleat stanchion, can relatively fix cleat stanchion to move up and down, movable cleat stanchion is distributed with the pin-and-hole corresponding with through hole on fixing cleat stanchion vertically simultaneously, when the through hole on fixing cleat stanchion corresponding with the pin-and-hole on movable cleat stanchion through time, latch can be inserted, thus connect and fixing cleat stanchion and movable cleat stanchion, be installed with pulley gear in the upper end of movable cleat stanchion, pulley gear includes the semi-surrounding inverted U framework that Open Side Down and the pulley installed in the frame, the bottom of fixing cleat stanchion connects operating rope ladder.

2. the adjustable rope ladder head of transmission line of electricity according to claim 1, it is characterized in that, also include Manual brake device, it includes brake hand handle, brake shoes and spring catch, spring catch is arranged on the wheel shaft inner chamber of pulley, and brake shoes symmetry is arranged on inverted U framework biside plate corresponding to the two sides of pulley, and the upper surface of its one end and inverted U framework is hinged, the movable end of spring catch is positioned on the other end side of brake shoes, and brake hand is the fixed end of linking springs pin.

3. the adjustable rope ladder head of transmission line of electricity according to claim 1, it is characterized in that, also include a movable sliding sleeve, it includes movable frame, guide rod and hook-shapedly to seal up a door, described movable frame is by four external members, two treadles and two compression spring set quadrangularly frameworks, wherein each two the external member covers in left and right are through on fixed ladder post following side, for four summits of quadrilateral frame, two treadles are respectively the bottom and upper segment of quadrilateral frame, the two ends of treadle are fixedly connected with left and right external member respectively, two Compress Springs are respectively the left side and the right of quadrilateral frame, Compress Spring is between two external members of same fixing cleat stanchion, outside two external members of same fixing cleat stanchion, be provided with guide rod, two external members are run through in guide rod bottom, and top is connected with hook-shaped sealing up a door, describedly hook-shapedly seal up a door as a kind of rod member of L-type, one end is connected with guide rod top, then extends to another side plate according to the side plate of L-type from inverted U framework, seals closed by the opening of inverted U framework, the other end of L-type rod member, then in hook-shaped, is connected with another side plate of inverted U framework.