CN201149972Y - Equipotential working curved ladder - Google Patents

Abstract

The utility model discloses a curved ladder for equipotential operation, which comprises a straight ladder and a horizontal frame. The straight ladder and the horizontal frame are both made of insulating materials. Cross-arm connectors for cross-arm angle steel fastening connection. The utility model has the advantages that: for many poles and towers with compact wiring and unable to enter the electric field according to conventional methods, a bent-shaped ideal space passage for entering the electric field is erected from the most suitable space position, and the intervention of the horizontal frame is correspondingly generated. The minimum distance to the ground potential increases the combination gap, so that the utility model can obtain a safe combination gap, enter the electric field and perform equipotential work smoothly.

Description

Equipotential working curved ladder

technical field

The utility model relates to a work tool used in overhead lines, in particular to a curved ladder for equipotential work.

Background technique

According to the provisions of live work in the "State Grid Corporation of China Electricity Safety Work Regulations" (power line part), the combined clearance of equipotential operators must meet the requirements during the operation process. The combined clearance is composed of S1+S2, where S1 is the equipotential electrician's distance from the ground potential The minimum distance, S2 is the minimum distance between the equipotential electrician and the live conductor.

In many high-voltage lines erected on the same tower, the conductors are arranged vertically. The distance is tight. At this time, according to the conventional operation method, for example, when the insulator replacement operation is carried out during the process of the high-tower insulation rope entering the electric field along the insulator string, the equipotential operation cannot be performed because the combined gap cannot meet the requirements.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies in the prior art, and provide an equipotential operation curved ladder on a pole tower with vertically arranged wires and a compact distance between phases to ensure that equipotential operators can safely enter the electric field.

The purpose of this utility model is achieved through the following approaches.

The main points of the structure of the curved ladder for equipotential work are: the curved ladder includes a straight ladder and a horizontal frame, both of which are made of insulating materials, and the two are intersected and connected. Cross-arm connectors for cross-arm angle steel fastening connection.

When in use, the electrician on the tower hangs the equipotential operation curved ladder and fastens the outer end of the horizontal frame with the cross-arm angle steel at the appropriate position above the insulator string, and at the same time supports the lower end of the straight ladder on the wire, thus forming a curved ladder. Folded ladder. The equipotential electrician climbs the tower to the working position, and with the cooperation of the electrician on the tower, enters the horizontal frame of the equipotential operation curved ladder from above the insulator string, moves laterally along the horizontal frame to the straight ladder, and enters the electric field vertically along the straight ladder Carry out live work, and after the work is completed, the equipotential electrician exits the electric field from the wire along the original path of the equipotential work ladder.

In this way, using the curved ladder, a bent-shaped ideal space channel for entering the electric field is erected from the most suitable space position, and the minimum distance to the ground potential generated by the intervention of the horizontal frame increases the combined gap, making In many occasions where the wiring is tight and the electric field cannot be entered by conventional methods, the utility model can be used to obtain a safe combination gap, enter the electric field smoothly and perform equipotential operation.

For the bent ladder frame formed by the curved ladder for equipotential work, when the equipotential work electrician is located at the two ends of the bent ladder frame, the combination gap is the smallest. When it is at the outer end of the horizontal frame, the minimum distance from the ground potential is zero, and the minimum distance from the live conductor is the length of the oblique line between the external end of the horizontal frame to the bottom end of the straight ladder and the wire support; and when When it is at the bottom end of the straight ladder and the wire support, the minimum distance from the live wire is zero, and the minimum distance from the ground potential is the length of the oblique line between the outer end of the horizontal frame and the bottom end of the straight ladder and the wire support . In addition, when the electrician for equipotential work is at any position on the bent ladder frame other than the two ends, the combined gap is greater than the combined gap at the above two ends. According to the way of obtaining the combination gap, those skilled in the art can determine the length of the horizontal frame and the vertical ladder according to the actual situation of the tower and the corresponding national safety requirements for the combination gap.

The purpose of this utility model can also be achieved through the following approaches.

There are many options for the specific form of the cross-arm connector. Since the cross-arm is generally assembled from angle steel, all devices that can be fastened to the angle steel in the prior art are applicable. One option is provided below:

The cross arm connector includes a main body, a pressure plate and fastening bolts. The bottom of the main body is connected to the end of the cross frame. The bottom of the main body vertical plate has a groove that can be embedded in the end of the cross arm angle steel wing plate. The horizontal frame above the main vertical plate Fastening bolts connect the vertical plate of the main body with the pressure plate, and the lower end of the pressure plate has a bending head that can be hooked with the other wing plate end of the cross-arm angle steel.

In this way, the cross-arm angle steel can be firmly fastened between the main body vertical plate and the pressing plate.

The connection mode between the main body and the end of the cross frame can be a fixed connection, but it is preferably hinged.

The main body can be directly connected to the end of the cross frame, or can be connected to the end of the cross frame through an intermediate piece.

The middle part is preferably a kind of "U" hanging ring, its opening is downward and is hinged with the end of the cross frame, its top is hinged with the main body, and the two hinge axes are perpendicular to each other.

In this way, the main body obtains a turning margin in two spatial directions relative to the end of the horizontal frame, so that the curved ladder can be more conveniently fastened and connected with the horizontal frame in the actual operation at high altitude.

There are many options for the specific structure of the horizontal frame:

It can be a flat plate, or a stair plate with steps distributed on the plate at intervals. The shape and structure of this stair plate is the same as the springboard used by the ship to dock. The rods are parallel and spaced apart and fixed into an integral frame.

A straight ladder is a ladder with rungs.

The horizontal frame and the vertical ladder are fastened and connected by a position adjustment mechanism.

The junction of the vertical ladder and the horizontal frame can be adjusted through the position adjustment mechanism, so that the length from the junction to the wire can be adjusted according to the actual situation.

The position adjustment mechanism can take many forms, the following are two of them:

There are connecting holes distributed at intervals along the length of the ladder, and a bolt passes through the holes and the holes on the horizontal frame to fasten the horizontal frame and the vertical ladder;

The upper part of the straight ladder has a bare rod section without steps, and a hollow rod sleeve is fixed at the inner end of the horizontal frame. The screw is fastened on the outer wall of the bare rod section.

The lower section of the straight ladder is fixedly provided with a supporting mechanism connected with the wire support.

Generally speaking, the bottom rung of the ladder can support the conductor. In order to support firmly, a kind of supporting mechanism can be specially set up. The specific position and multiple options of the support mechanism in the lower section of the ladder:

The support mechanism is either located at the bottom end of the side bar of the straight ladder, or at the center of transverse symmetry of the steps of the straight ladder, preferably at the center of transverse symmetry of the steps of the straight ladder, so that it will be supported more firmly.

The structures that can be supported on the wires in the prior art can be selected, and the following is one of them:

The support mechanism is a kind of inner groove.

When supporting, the wire is contained in the inner groove.

In the above-mentioned inner groove, it is preferable to also be embedded with a kind of retaining ring bent into a groove shape by a spring piece.

The wires are clamped by the circlip so that the support can be more stable.

The snap ring port is preferably flared outwardly.

Preferably, the depth of the inner groove should be more than 1.5 times the diameter of the wire, and the width of the inner groove should be between 1.01-1.5 times the diameter of the wire.

In this way, a snap-in effect can be obtained for a more stable support.

In summary, compared with the prior art, the utility model has the following advantages: for many towers with compact wiring and unable to enter the electric field according to conventional methods, a bent-shaped ideal space for entering the electric field is erected from the most suitable space position , and the minimum distance to the ground potential generated by the intervention of the horizontal frame increases the combination gap, so that a safe combination gap can be obtained by using the equipotential operation curved ladder described in the present invention, and the electric field can be smoothly entered and the etc. Potential work.

Description of drawings

Fig. 1 is the structural representation of the equipotential work platform of embodiment 1 of the present utility model

Fig. 2 is the structural representation of the cross-arm connector of embodiment 1

The structural schematic diagram of the straight ladder of Fig. 3 embodiment 1

Fig. 4 is the cross frame structure schematic diagram of embodiment 1

Fig. 5 is the cross frame structure schematic diagram of embodiment 2

Explanation of symbols 1 Straight ladder 2 Cross frame 21 Cross arm connector 211 Main body 2111 Main body bottom 212 Press plate 2121 Bending head 213 Fastening bolt 215 Main body vertical plate 2151 Groove 216 Intermediate piece 3 Position adjustment mechanism 31 Rod sleeve 32 Fastening screw 4 Support mechanism 41 inner groove 42 snap ring

Detailed ways

Below in conjunction with embodiment the utility model is described in more detail.

Example 1

A curved ladder for equipotential work as shown in Figure 1-4, the curved ladder includes a straight ladder 1 and a horizontal frame 2, both the straight ladder and the horizontal frame are made of insulating materials, the two are crossed and connected, and the outer end of the horizontal frame A cross-arm connecting piece 21 that can be fastened to the pole-tower cross-arm angle steel is provided at the top. The cross arm connector 21 includes a main body 211, a pressure plate 212 and a fastening bolt 213, the bottom of the main body 2111 is connected to the end of the cross frame, and the bottom of the side of the main body vertical plate 215 has a groove into which the end of the cross arm angle steel wing plate can be embedded. 2151, the fastening bolts of the horizontal frame above the main body vertical plate connect the main body vertical plate and the pressure plate, and the lower end of the pressure plate has a bending head 2121 that can be hooked with the other wing plate end of the cross arm angle steel. The connection mode between the main body and the end of the cross frame is through a middle piece 216 and then hinged to the end of the cross frame. The middle part is a "U" hanging ring, which opens downward and is hinged with the end of the horizontal frame, and its upper part is hinged with the main body, and the axes of the two hinges are perpendicular to each other. The said horizontal frame distributes step ladders at intervals on the flat plate, and the shape and structure of the ladder boards are the same as the springboards used by ships to dock. The straight ladder is a ladder with steps. The horizontal frame and the straight ladder are fastened and connected by a position adjustment mechanism 3. The position adjustment mechanism is that the upper part of the straight ladder has a bare rod section without steps, and a hollow rod section is fixed at the inner end of the horizontal frame. Rod sleeve 31, in which the bare rod section is threaded, and a kind of end face fastening screw 32 threaded in the rod sleeve is fixed on the outer wall of the bare rod section. The lower part of the straight ladder is fixedly provided with a kind of supporting mechanism 4 connected with the wire support, and the supporting mechanism is positioned on the transverse symmetrical center of the vertical ladder steps, so that it will be more firmly supported. The supporting structure is an inner groove 41, and a retaining spring 42 bent into a groove shape by a spring piece is embedded in the groove. The depth of the inner groove should be more than 1.5 times the diameter of the wire, and the width of the inner groove should be 1.3 times the diameter of the wire.

The parts not described in this embodiment are the same as the prior art.

Example 2

The structure of embodiment 2 is basically the same as that of embodiment 1, and its horizontal frame part is a framework in which a plurality of rods with the same length are distributed in parallel and at intervals and fixedly connected into one. The position adjustment mechanism between the horizontal frame and the vertical ladder is that connecting holes are distributed on the vertical ladder at intervals along its length direction, and a kind of bolt passes through the holes and the holes on the horizontal frame to fasten the horizontal frame and the vertical ladder. The supporting mechanism of the lower section of the straight ladder is located at the bottom end of the side bar of the straight ladder.

The parts not described in this embodiment are the same as those in Embodiment 1.

Claims (15)

1. Equipotential operating curve ladder, it is characterized in that: this curved ladder comprises vertical ladder (1) and crossbearer (2), vertical ladder and crossbearer are made by insulating material, the two intersection and connection, the crossbearer outer end be provided with a kind of can with the fastening cross-arm connector (21) that connects of shaft tower cross-arm angle steel.

2. Equipotential operating curve ladder according to claim 1, it is characterized in that: cross-arm connector (21) comprises main body (211), pressing plate (212) and fastening bolt (213), bottom part body (2111) is connected with the crossbearer termination, main body riser (215) side bottom has the groove (2151) that a kind of cross-arm angle steel wing plate end can embed, the fastening bolt of crossbearer above the main body riser links together main body riser and pressing plate, and the pressing plate lower end has a kind of bending head (2121) that can connect with another wing plate end hook of cross-arm angle steel.

3. Equipotential operating curve ladder according to claim 2 is characterized in that: the connected mode of main body and crossbearer termination is hinged.

4. Equipotential operating curve ladder according to claim 3 is characterized in that: main body or be connected with the crossbearer termination perhaps is connected with the crossbearer termination by a kind of middleware (216) again.

5. Equipotential operating curve ladder according to claim 4 is characterized in that: middleware preferably a kind of " U " link, and Open Side Down and hinged with the crossbearer termination for it, and its top and main body are hinged, and two hinged axle center are vertical mutually.

6. according to any one described Equipotential operating curve ladder of claim 1 to 5, it is characterized in that: described crossbearer (2) is a kind of flat board, perhaps at gangboard or a kind of ladder of step spaced apart on flat board, or by parallel and the spaced apart and affixed all-in-one-piece framework of the identical bar of complex root length.

7. Equipotential operating curve ladder according to claim 6 is characterized in that: the fastening connection by a kind of position adjusting mechanism (3) between crossbearer and the vertical ladder.

8. Equipotential operating curve ladder according to claim 7 is characterized in that: described position adjusting mechanism is that its length direction of vertical ladder upper edge is intervally distributed with connecting hole, and a kind of bolt passes hole on this hole and the crossbearer and fastening connection crossbearer and vertical ladder.

9. Equipotential operating curve ladder according to claim 7, it is characterized in that: described position adjusting mechanism is a kind of naked bar section that does not have step for vertical ladder top has, the crossbearer inner termination is installed with a kind of bar cover of hollow, naked bar section is set in this bar cover, and a kind of end face trip bolt that is threaded in the bar cover is fixed on the naked bar section outer wall.

10. it is characterized in that according to Claim 8 or 9 described Equipotential operating curve ladders: the vertical ladder hypomere is installed with a kind of and supporting mechanisms (4) the lead support and connection.

11. Equipotential operating curve ladder according to claim 10 is characterized in that: supporting mechanism or be positioned at vertical ladder side lever bottom head, or be positioned on the vertical ladder step lateral symmetry center.

12. Equipotential operating curve ladder according to claim 11 is characterized in that: supporting mechanism is a kind of inner groovy.(41)

13. Equipotential operating curve ladder according to claim 12 is characterized in that: in groove, also be embedded with a kind of jump ring (42) that is bent into fluted body by spring leaf.

14. Equipotential operating curve ladder according to claim 13 is characterized in that: preferably outer the opening of jump ring port is the enlarging type.

15. Equipotential operating curve ladder according to claim 14 is characterized in that: the degree of depth of described inner groovy should be more than 1.5 times of diameter of wire, the 1.01-1.5 that the width of inner groovy should be diameter of wire doubly between.

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