CN105186145B - The portable earthing or grounding means of livewire work - Google Patents

Abstract

The invention provides a portable grounding device for live work, which belongs to the field of electric tools. The device includes an inverted U-shaped clamp, a door-shaped connecting frame, a hollow sleeve, a tilting mechanism and a spring set in the hollow sleeve, a T-shaped bar set in the spring, an insulating rod set on the tilting mechanism, and an inverted The U-shaped wire clamp is flexibly connected with the hollow sleeve through the door-shaped connecting frame. The device has the characteristics of stable wire clamping and convenient wire loosening. It is suitable for grounding of high-voltage wires in different directions such as horizontal and vertical angles. It has high safety, work efficiency and flexibility, and has small weight, low cost and strong practicability. Etc.

Description

Portable grounding device for live work

【Technical field】

The invention relates to the field of electrical tools, in particular to a portable grounding device for live work.

【Background technique】

In modern society, high-voltage wires and cables can be seen everywhere, and the problem of safety insulation when repairing and testing them has become a major problem facing today. Seeking a feasible way to solve the problem has become a requirement to ensure the safety of construction personnel and improve the work efficiency of construction personnel. Long operating distance and large external interference are the common characteristics of these environments, so there are huge defects in the application of spiral grounding clamps and double tongue grounding clamps. The spiral ground wire clamp has greater stability when clamping the wire, but it is difficult to clamp the wire on the high-voltage cable with a large distance, and it clamps the wire through thread adjustment, and the operating lever needs to be twisted many times to make it work. The horizontal locking lever locks the wire in the jaw, which is extremely inconvenient to operate and greatly reduces work efficiency. Although the double-tongue type is easier to clamp than the spiral grounding wire clamp, the elastic force hook can be fixed on the wire through the tension spring of the two tongues, but the wire is located between the two tongues after hanging. At the top of the inverted figure-eight shape, because the wire is often in the outdoor environment of strong wind and heavy rain, and even under the action of wind, the wire will dance, causing the hook to turn over, causing the hook to fall off from the wire, resulting in temporary short circuit failure. Serious personal injury is caused to maintenance personnel, so there is a great potential safety hazard.

In view of this, it is necessary to modify the existing grounding clamp to improve its stability, safety and reduce the difficulty of high-altitude operation.

【Content of invention】

The purpose of the present invention is to provide an improved portable grounding device for live work in view of the above-mentioned problems. Grounding has high safety, work efficiency and flexibility, and has the advantages of small dead weight, low cost and strong practicability.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

Portable grounding device for live work, including the following components:

Inverted U-shaped wire clip, double-tongued spring clip is designed inside the inverted U-shaped wire clip;

A door-shaped connecting frame, the door-shaped connecting frame has a first column, a second column and a hollow part, and the first column is connected to one side of the inverted U-shaped clamp;

A hollow sleeve, the hollow sleeve has a cuboid head, a cylindrical body and a cylindrical tail; the inner wall of the cylindrical tail is provided with four guide rails evenly distributed along the circumference, and the guide rails have a first end and a second end, the first end of the guide rail is a bevel; the inner wall of the cylindrical tail is provided with a ring-shaped limit protrusion along the second end of the four guide rails; the head of the hollow sleeve and the door The second column of the shaped connecting frame is vertically connected;

A tilting mechanism, the tilting mechanism is arranged on the guide rail of the inner wall of the hollow casing, and is composed of a runner and a tilting core; the runner is composed of a first cylinder and a second cylinder with different outer diameters connected, the first A stepped surface is formed between the cylinder and the second cylinder. The inside of the first cylinder with a small outer diameter is hollow, and a card slot is opened on the side wall; the surface of the second cylinder with a large outer diameter is provided with four annular intervals. Distributed right-angled trapezoidal projections, guide grooves are formed between adjacent right-angled trapezoidal projections to engage with the guide rail, and the slope of the right-angled trapezoidal projections can be engaged with the first end surface of the guide rail; the lifting core is cylindrical and has a second One end surface and the second end surface, the lifting core is sleeved on the second cylinder, the first end surface of the lifting core has sawtooth, the sawtooth on the lifting core intersects with the slope of the right-angled trapezoidal protrusion, and the surface of the lifting core is also provided with There are four square protrusions distributed in an annular interval, and guide grooves are formed between adjacent square protrusions to engage with the guide rail. The outer diameter of the lifting core is smaller than the inner diameter of the annular limit protrusion, and the end of the square protrusion away from the sawtooth is in contact with the ring The limit protrusion contacts and is blocked;

A spring, the spring is arranged inside the hollow sleeve, one end of which is connected to the head of the hollow sleeve, and the other end is sleeved on the first cylinder, and is connected to the stepped surface formed between the first cylinder and the second cylinder touch;

T-shaped bar, the vertical bar of the T-shaped bar runs through the inside of the spring and the inside of the first cylinder of the runner, and half of the cross bar of the T-shaped bar falls into the hollow part of the door-shaped connecting frame; the T-shaped bar The length of the cross bar is twice the opening width of the inverted U-shaped clamp;

The insulating rod is connected with the second end surface of the lifting core.

A further improvement is that a through hole vertically passing through the second column is provided in the second column of the door-shaped connecting frame, and a stud is fixed at the head of the hollow sleeve, and the stud is provided with threads, and the stud The length is greater than the length of the through hole, and the stud passes through the through hole of the second column to connect the door-shaped connecting frame with the hollow sleeve.

A further improvement is that the heights of the right-angled trapezoidal bumps and the square bumps are the same.

In summary, owing to adopting above-mentioned technical scheme, the beneficial effect of the present invention is:

1. The present invention designs a T-shaped bar assembly to block the opening of the inverted U-shaped clamp after clamping the wire, which can avoid falling off and turning over of the high-voltage wire after clamping the wire, and improves the reliability and safety of the portable grounding device for live work.

2. By designing the cooperation between the T-shaped bar assembly and the tilting mechanism, the present invention can realize that when the tilting mechanism is pressed, the T-shaped bar will rotate 90°, thereby opening and closing the opening of the inverted U-shaped clamp, which is convenient for threading , fixed line and offline.

3. In the present invention, the connection mode between the door-shaped connecting frame and the hollow sleeve is a movable connection, and the door-shaped connecting frame can drive the inverted U-shaped clamp to perform multi-angle tightening, and can be arbitrarily tightened according to the positional relationship between the high-voltage line and the operator. Angle adjustment, strong practicability, and the operation speed can be greatly improved, the operation efficiency is high, and it has good flexibility.

【Description of drawings】

Fig. 1 is the plane semi-sectional view of the portable grounding device for live work of the present invention;

Fig. 2 is the sectional view of runner;

Figure 3 is a sectional view of lifting the core;

Among them, 1-inverted U-shaped clamp, 2-door-shaped connecting frame, 21-first column, 22-hollow part, 23-second column, 3-hollow sleeve, 31-cuboid head, 32-rail , 321-the first end of the guide rail, 322-the second end of the guide rail, 4-runner, 41-the first cylinder, 42-the second cylinder, 43-step surface, 44-right-angled trapezoidal bump, 5- Lifting core, 51-first end face of lifting core, 52-square protrusion, 53-second end face of lifting core, 6-insulating rod, 7-spring, 8-T-shaped bar, 81-T-shaped bar cross bar, 82-T-bar upright, 9-stud.

【detailed description】

Hereinafter, the present invention will be further described in detail through specific embodiments and with reference to the accompanying drawings.

As shown in Figure 1, it is a plane half-sectional view of the portable grounding device for live work of the present invention. Moving mechanism, the T-shaped bar 8 that is enclosed within the hollow casing 3, the insulating rod 6.

A double-tongue type spring clip is designed in the inverted U-shaped wire clamp 1 . The door-shaped connecting frame 2 has a first column 21, a second column 23 and a hollow portion 22, and the first column 22 is connected to one side of the inverted U-shaped clamp 1; the second column 23 is connected to the head of the hollow casing 3 connected vertically.

The main body of the hollow sleeve 3 is cylindrical, and in order to facilitate the connection with the door-shaped connecting frame 2, its head is preferably made as a cuboid; Guide rails 32, these guide rails 32 all have a first end 321 and a second end 322, the first end 321 of the guide rail is an inclined plane; the second end 322 of the four guide rails along the second end 322 of the hollow casing 3 is provided with an annular stopper rise.

The spring 7 is located inside the hollow sleeve 3, one end of which is connected to the head of the hollow sleeve 3, and the other end is sleeved on the runner 4, specifically on the first cylinder 41 of the runner 4, and with the first The stepped surface 43 formed between the cylinder 41 and the second cylinder 42 is in contact. The vertical bar 81 of the T-shaped bar 8 runs through the inside of the first cylinder 41 of the spring 7 and the runner, and half of the cross bar 82 of the T-shaped bar 8 falls into the hollow portion 22 of the door-shaped connecting frame 2, and the T-shaped bar 8 The length of cross bar 82 is 2 times of the opening width of inverted U-shaped wire clamp 1, just can block the opening of inverted U-shaped wire clamp, avoids that high voltage line comes off. The insulating rod 6 is connected with the lifting core 5 of the tilting mechanism, and is used to push the lifting core 5 to move along the guide rail.

The tilting mechanism is located on the guide rail 32 of the inner wall of the hollow casing 3 and is composed of a runner 4 and a lifting core 5 . FIG. 2 and FIG. 3 are structural schematic diagrams of the runner 4 and the lifting core 5 respectively.

See Fig. 2, the runner 4 is formed by connecting the first cylinder 41 and the second cylinder 42 with different outer diameters, a stepped surface 43 is formed between the first cylinder 41 and the second cylinder 42, and the first cylinder 41 with a small outer diameter The inside of a cylinder 41 is hollow, and a draw-in groove is provided on the side wall; the surface of the second cylinder 42 with a large outer diameter is provided with four right-angled trapezoidal protrusions 44 distributed in an annular interval, and between adjacent right-angled trapezoidal protrusions 44 A guide groove is formed between them to engage with the guide rail 32 on the inner wall of the hollow casing 3;

As shown in Fig. 3, the lifting core 5 is cylindrical and has a first end face 51 and a second end face 53. The lifting core 5 is sleeved on the second cylinder 42 of the runner 4, and the first end face 51 of the lifting core 5 has sawtooth. The sawtooth on the lifting core 5 is in contact with the slope of the right-angled trapezoidal bump 44 alternately. The surface of the lifting core 5 is also provided with four square bumps 52 distributed in an annular interval, and guide grooves and hollow spaces are formed between adjacent square bumps 52. The guide rail 32 on the inner wall of the casing 3 engages, and the outer diameter of the lifting core 5 is smaller than the inner diameter of the annular limiting protrusion. After the runner 4 and the core 5 are assembled on the guide rail 23, they can slide up and down along the guide rail 23. The height of the square projection 52 is required to be the same as the height of the right-angled trapezoidal projection 44, and the square projection 52 can be covered by the hollow casing. 3 is blocked by the annular stop protrusion.

The working principle of the present invention is: push the insulating rod 6, and then push the shovel core 5, the shovel core 5 pushes the runner 4, the sawtooth of the shovel core 5 moves along the hypotenuse of the right-angled trapezoidal bump 44, the spring 7 is compressed, and the runner The right-angled trapezoidal bump 44 of 4 moves to the top of the guide rail 23 slope on the hollow sleeve 3, the runner 4 loses the constraint of the guide rail 23, and rotates 90°, driving the T-shaped bar 8 to rotate 90°, and the T-shaped bar 8 blocks the inverted U The opening of the shaped wire clamp 1 prevents the hanging high-voltage wire from falling off. When continuing to promote the insulating rod 6, the power is transmitted to the T-shaped bar 8 by the tilting assembly, so that the T-shaped bar 8 is rotated 90° again, and the opening of the inverted U-shaped wire clamp 1 is opened.

When the present invention is in use, first put the portable grounding device for live work on the high-voltage wire, and then pull down the device of the present invention to press the high-voltage wire into the duck tongue of the inverted U-shaped wire clamp 1, clamp the high-voltage wire, and then push the insulation Bar 6 makes T-shaped bar 8 rotate 90 °, seals the opening of inverted U-shaped wire clamp 1. After the live work is completed, push the insulating rod 6 again, the T-shaped bar 8 rotates 90° again, the opening of the inverted U-shaped wire clamp 1 is opened, and the restraint to the high-voltage wire is ended, and the action of releasing the wire is completed.

Another better embodiment of the present invention is to improve the connection mode between the door-shaped connecting frame 2 and the hollow sleeve 3, and a through hole vertically penetrating through the second column 23 is set in the second column 23 of the door-shaped connecting frame 2. The head of hollow casing 3 fixes a stud 9, and stud 9 is provided with screw thread, and the length of stud 9 is greater than the length of through hole, and stud 9 is put on nut after passing through the through hole of second column 23 to make the door Connecting frame 2 and hollow sleeve 3 are connected. The advantage of this design is that when the high-voltage line is not horizontal, the relative angle between the inverted U-shaped clamp 1 and the hollow sleeve 3 can be adjusted as needed, and it is suitable for high-voltage lines, busbars, and steel-cored aluminum conductors at different angles such as horizontal and vertical. It is used for grounding to ensure safe grounding within the operating range of power failure equipment.

The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not used to limit the scope of the patent application of the present invention. All equivalent changes or modifications completed under the technical spirit suggested by the present invention shall belong to The scope of patents covered by the present invention.

Claims (3)

1. the portable earthing or grounding means of livewire work, it is characterised in that：Including

Inverted U-shaped wire clamp (1), inverted U-shaped wire clamp (1) is interior to be designed with double tongue type spring clip；

Door shape link (2), the door shape link (2) have the first column (21), the second column (23) and hollow bulb (22), First column (21) is connected with a side of the inverted U-shaped wire clamp (1)；

Hollow sleeve (3), the hollow sleeve (3) have cuboid head (31), cylinder-shaped body and cylindrical tail portion；Institute Stating cylindrical tail portion inwall, circumferentially equally distributed guide rail (32), the guide rail (32) have first end provided with four (321) and the second end (322), the first end (321) of the guide rail is inclined-plane；Along described four on the cylindrical tail portion inwall It is raised that the second end (322) of bar guide rail is provided with an annular stop；The head (31) of the hollow sleeve and the door shape link The second column (23) vertical connection；

Mechanism is lifted, the mechanism of lifting is located on the guide rail (32) of hollow sleeve (3) inwall, by runner (4) and lifts core (5) group Into；The runner (4) is made up of different the first cylinder (41) of external diameter and the second cylinder (42) connection, the first cylinder (41) form step surface (43) between the second cylinder (42), the inside of small the first cylinder (41) of external diameter to be hollow and Neck is offered in side wall；Big the second cylinder (42) surface of external diameter is provided with the right-angled trapezium projection of four annular space distributions (44), between adjacent right-angled trapezium projection (44) formed guide groove engaged with the guide rail (32), right-angled trapezium projection (44) it is oblique Face can engage with the first end (321) of guide rail (32)；It is described to lift core (5) as cylindrical and there is first end face (51) and second End face (53), lift core (5) and be set on the second cylinder (42), the first end face (51) for lifting core has sawtooth, lifts on core (5) The inclined-plane of sawtooth and right-angled trapezium projection (44) staggeredly touches, and the surface for lifting core (5) is additionally provided with the side of four annular space distributions Shape projection (52), guide groove is formed between adjacent prismatic projection (52) and is engaged with the guide rail (32), the external diameter for lifting core (5) is less than ring The internal diameter of shape spacing preiection, one end and annular stop projection contacts of the bumping square (52) away from sawtooth and is blocked；

Spring (7), the spring (7) are located at hollow sleeve (3) inside, and its one end is connected to the head (31) of hollow sleeve, separately The step surface that one end is enclosed on the first cylinder (41) and formed between the first cylinder (41) and the second cylinder (42) (43) contact；

T-bar (8), the montant (81) of the T-bar (8) are applied in the first cylinder of the spring (7) inside and runner (4) (41) internal, the cross bar (82) of the T-bar (8) has half to fall into the hollow bulb (22) of a shape link (2)；T-bar The length of cross bar (82) is twice of the A/F of inverted U-shaped wire clamp (1)；

Insulating bar (6), the insulating bar (6) are connected with lifting the second end face (53) of core (5).

2. the portable earthing or grounding means of livewire work according to claim 1, it is characterised in that：The door shape link (2) The second column (23) in be provided with the vertical through hole for running through the second column (23), be fixed with one in the head of hollow sleeve (31) Stud (9), stud (9) are provided with screw thread, and the length of stud (9) is more than the length of through hole, and stud (9) passes through the second column (23) Through hole a shape link (2) is connected with hollow sleeve (3).

3. the portable earthing or grounding means of livewire work according to claim 1, it is characterised in that：The right-angled trapezium projection (44) it is identical with the height that bumping square (52) is raised.