CN109449869B - Wiring protection device for replacing electric energy meter with power on - Google Patents

Abstract

The utility model provides a wiring protection device of electric energy meter is changed in electrified, includes insulating ripple flexible cover, is equipped with the insulating plastic cover of external screw thread, is equipped with the tight cover of clamp of internal screw thread, all be equipped with an opening along the axial through hole wall on insulating ripple flexible cover, insulating plastic cover, insulating flexible cover one end is connected with insulating plastic cover, insulating plastic cover's opening and insulating ripple flexible cover's opening intercommunication are located the homonymy, insulating plastic cover internal fixation has two at least elastic copper pieces along the axial extension, elastic copper pieces are located insulating plastic cover's inside wall respectively, be equipped with the via hole that corresponds with elastic copper piece on the insulating plastic cover wall, be equipped with the plug wire hole and correspond with the via hole on the tight cover of clamp, the extension end of elastic copper piece stretches into in the insulating ripple flexible cover, the tight cover of clamp is screwed up through the external screw thread cooperation of internal screw thread and insulating plastic cover, makes insulating plastic cover reducing drive elasticity to the center motion to and the copper piece hole counterpoint with insulating plastic cover's via hole.

Description

Wiring protection device for replacing electric energy meter with power on

Technical field

The invention relates to a protection device, in particular to a wiring protection device for replacing an electric energy meter when it is live.

Background technique

At present, the electric energy meter of the power supply line is damaged. During the construction process of replacing the electric energy meter, because the power cannot be cut off, the workers always replace the electric energy meter under live conditions. When replacing an electric energy meter, the three-phase four wires connected to the old electric energy meter are usually pulled out from the terminals. Since the terminals of the pulled out wires are exposed, to prevent electric shock, workers usually use insulating tape to expose the wires. The terminals are wrapped and wrapped. However, when the wire is to be re-inserted into the new meter terminal, the wrapped insulating tape must also be removed. During the removal of the tape, if you are not careful, it can easily come into contact with the bare wire, resulting in Electric shock. In actual work, an insulating telescopic tube is also used to replace the insulating tape. That is, an insulating telescopic tube is put on the exposed terminal of the wire pulled out from the electric energy meter, so that the exposed end of the wire is blocked in the insulating telescopic tube. To prevent contact and electric shock, when re-inserting the new meter terminal, just press the insulating telescopic tube against the end face of the terminal, compress the insulating telescopic tube forcefully, insert the exposed terminal end of the wire into the terminal hole, and complete the replacement after fixing The new meter is wired, but an insulated telescopic tube is used. When the insulated telescopic tube is put on the wire from the exposed terminal of the wire, there is still a situation where the worker touches the exposed terminal of the wire. If the worker is not careful, when putting the insulated telescopic tube on, the It will touch the exposed terminal of the wire and cause electric shock. This kind of insulated telescopic tube cannot fundamentally prevent electric shock. In order to prevent workers from getting electric shock when replacing the electric energy meter of the three-phase four-wire power supply line during live work, a protection device is needed that can completely avoid electric shock when replacing the electric energy meter of the three-phase four-wire power supply line.

Contents of the invention

The object of the present invention is to address the shortcomings of the existing technology and provide a wiring protection device for replacing an electric energy meter when it is powered on, which can replace the electric energy meter without interruption and avoid contact with bare wires during the process of replacing the electric energy meter. .

The technical solution of the present invention is: a wiring protection device for live replacement of electric energy meters, including an insulating corrugated telescopic sleeve, an insulating plastic sleeve provided with external threads, and a clamping sleeve provided with internal threads. The insulating telescopic sleeve, the insulating plastic sleeve The hole wall of the sleeve and the clamping sleeve is provided with an opening that penetrates the hole wall in the axial direction. One end of the insulating telescopic sleeve is fixedly connected to the insulating plastic sleeve. The opening of the insulating plastic sleeve is connected to the opening of the insulating telescopic sleeve and is located on the same side. , the insulating plastic sleeve is fixed with at least two elastic copper sheets extending in the axial direction. The elastic copper sheets are respectively located on the inner side walls of the insulating plastic sleeve. The walls of the insulating plastic sleeve are provided with elastic copper sheets respectively. Corresponding via holes, the extended end of the elastic copper sheet extends into the insulating corrugated telescopic sleeve. The wall of the clamping sleeve is provided with plug holes corresponding to the via holes of the insulating plastic sleeve. The clamping sleeve By tightening the internal thread provided with the external thread of the insulating plastic sleeve, the insulating plastic sleeve is reduced in diameter and drives the elastic copper piece to move toward the center, and the wire insertion hole is aligned with the via hole of the insulating plastic sleeve.

The front of the external thread of the insulating plastic sleeve is provided with a tapered diameter reducing guide section, and the front end of the clamping sleeve is provided with a tapered diameter reducing compression section to cooperate with the reducing diameter guide section of the insulating plastic sleeve.

The outer shape of the clamping sleeve is set as a hexagonal long cylinder, and the length of the thread is 1/6 of the total length of the clamping sleeve.

The clamping sleeve is made of steel or hard plastic.

An insulating rubber pad is provided around the inner wall of the wiring hole on the clamping sleeve.

Adopt the above technical solution: when replacing the electric energy meter, since the openings provided on the insulating corrugated telescopic sleeve and the insulating plastic sleeve are connected on the same side, the wires on the old electric energy meter can be placed between the insulating corrugated telescopic sleeve and the insulating plastic sleeve through these two openings. In the plastic sleeve, slide the insulating corrugated telescopic sleeve and the insulating plastic sleeve along the wire to the position of the electric energy meter socket, and tighten them through the internal threads of the clamping sleeve and the external threads of the insulating plastic sleeve. Since the insulating corrugated telescopic sleeve cannot Continuing to move forward, the rotation of the thread forces the insulating corrugated telescopic sleeve to compress, and closes the opening of the insulating plastic sleeve and shrinks the diameter, driving the elastic copper piece to move toward the center to clamp the wire. At this time, the insulating plastic sleeve is clamped and fixed on the wire. After removing the bare wire segment of the wire from the socket of the old electric energy meter, stretch the insulating corrugated telescopic sleeve to one end of the bare wire so that the bare wire segment is wrapped in the insulating corrugated telescopic sleeve, and then place the insulating corrugated telescopic sleeve on the new At the socket of the meter, compress the insulating corrugated telescopic sleeve to expose the bare wire section of the wire. Connect it to the corresponding position of the socket of the new meter. Rotate the clamping sleeve in the opposite direction to loosen the insulating plastic sleeve and clamp the insulating corrugated telescopic sleeve in the opposite direction. Stretch one end of the sleeve to release the pressure clamping the wire and remove the wire from the opening. It can be seen that in the process of replacing the meter, since the wires are first covered in the insulation device and then the bare wires on the old electric energy meter are removed, the original method of workers first removing the bare wires on the old electric energy meter and then covering them is changed. Insulation device is installed in this operating mode to prevent workers from coming into contact with bare wires, thereby preventing electric shock accidents.

The front ends of the insulating plastic sleeve and the clamping sleeve are both tapered, so that when the clamping sleeve and the insulating plastic sleeve are rotated and tightened, the pressure of the insulating plastic sleeve shrinking can be increased, making the insulating plastic sleeve, copper sheet, and wire The contact is closer, increasing the pressure to fix the wire and preventing the insulating plastic sleeve from slipping on the wire. The clamping sleeve is set into a hexagonal cylindrical shape. The hexagonal shape and long length are convenient for workers to grasp and prevent slipping during tightening. In addition, the external thread on the insulating plastic sleeve is set shorter, allowing it to be tightened quickly.

Since the insertion hole on the clamping sleeve is equipped with an insulating rubber pad, and the insulating rubber pad has a large wrapping range, it can prevent electric shock when inserting the current wire of each phase. In addition, the clamping sleeve can also The use of hard plastic can also further provide insulation and avoid electric shock accidents.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments of the description.

Description of the drawings

Figure 1 is a schematic structural diagram of the present invention;

Figure 2 is a front view of the present invention;

Figure 3 is a schematic diagram of the present invention inserted into the electric energy meter socket;

Figure 4 is a schematic diagram of taking out the wire according to the present invention.

In the drawing, 1 is the insulating plastic sleeve, 1-1 is the reducing guide section, 1-2 is the via hole, 1-3 is the opening of the plastic sleeve, 2 is the clamping sleeve, 2-1 is the reducing compression section, 2 -2 is the opening of the clamping sleeve, 3 is the insulating rubber pad, 4 is the bare wire, 5 is the elastic copper sheet, 6 is the electric energy meter socket, 7 is the insulating corrugated telescopic sleeve, 7-1 is the opening of the telescopic sleeve, 8 is Wire insulation tube, 9 is the wire insertion hole.

Detailed ways

Referring to Figures 1 to 4, a wiring protection device for replacing electric energy meters when hot is provided, including an insulating corrugated telescopic sleeve 7, an insulating plastic sleeve 1 provided with external threads, and a clamping sleeve 2 provided with internal threads. The insulating corrugated telescopic sleeve 7 The hole walls of the sleeve 7, the insulating plastic sleeve 1 and the clamping sleeve 2 are all provided with an opening that penetrates the hole wall in the axial direction. One end of the insulating corrugated telescopic sleeve 7 is fixedly connected to the insulating plastic sleeve 1, and the insulating plastic sleeve 1 The opening is connected to the opening of the insulating corrugated telescopic sleeve 7 and is located on the same side. The insulating plastic sleeve 1 is fixedly provided with at least two elastic copper sheets 5 extending in the axial direction. The elastic copper sheets 5 are respectively located on the insulating plastic sleeve 1. On the inner wall, the inner wall of the insulating plastic sleeve 1 is provided with through holes 1-2 corresponding to the elastic copper sheet 5. The extended end of the elastic copper sheet 5 extends into the insulating corrugated telescopic sleeve 7. The clamping sleeve The wall of 2 is provided with plug holes 9 corresponding to the through holes of the insulating plastic sleeve 1. The clamping sleeve 2 is tightened with the external thread of the insulating plastic sleeve 1 through the internal thread provided, so that the insulating plastic sleeve 1 The diameter is reduced and the elastic copper piece 5 is driven to move toward the center, and the wire insertion hole 9 is aligned with the via hole 1-2 of the insulating plastic sleeve 1. The front end of the external thread of the insulating plastic sleeve 1 is provided with a tapered diameter reduction guide section 1-1, and the front end of the clamping sleeve 2 is provided with a tapered diameter reduction compression section 2-1 and the reduction section 2-1 of the insulating plastic sleeve 1. The diameter guide section 1-1 fits. The outer shape of the clamping sleeve 2 is set as a hexagonal long cylinder, and the length of the thread is 1/6 of the total length of the clamping sleeve. The clamping sleeve 2 can be made of steel or hard plastic. Insulating rubber pads 3 are provided around the inner wall of the plug hole 9 on the clamping sleeve.

It can be seen from the above structure that when replacing an electric energy meter, taking the replacement of a certain wire as an example, the insulating corrugated telescopic sleeve 7 of the present invention is provided with a telescopic sleeve opening 7-1, and the insulating plastic sleeve 1 is provided with a plastic sleeve opening 1-3 , and the opening 7-1 of the telescopic sleeve is connected with the opening 1-3 of the plastic sleeve on the same side. The voltage wire on the old electric energy meter can be inserted into the insulating corrugated telescopic sleeve 7 and the insulating plastic sleeve 1 through these two openings, and the insulation Slide the corrugated telescopic sleeve 7 and the insulating plastic sleeve 1 along the wire to the position of the old electric energy meter socket 6. Remove the two current wires of this phase and place them in the plug hole 9 provided on the clamping sleeve 2 and the elastic The copper sheets 5 are in contact, so the voltage and current wires of this phase form a short circuit. The insulating plastic sleeve 1 is clamped through the clamping sleeve openings 2-2 provided in the clamping sleeve 2, and the internal threads provided in the clamping sleeve 2 cooperate with the external threads of the insulating plastic sleeve 1 to tighten. Since the insulating corrugated telescopic sleeve 7 Unable to continue moving forward, the rotation of the thread forces the insulating corrugated telescopic sleeve 7 to compress, and closes the opening of the insulating plastic sleeve 1 and reduces the diameter, driving the elastic copper sheet 5 to move toward the center to clamp the wire. At this time, the insulating plastic sleeve 1 is on the wire. Instead of clamping and fixing, the bare wire 4 of this wire is removed from the old electric energy meter socket 6, and the insulating corrugated telescopic sleeve 7 is stretched toward one end of the bare wire, so that the bare wire 4 is wrapped in the insulating corrugated telescopic sleeve 7, and the wire The insulating tube 8 is wrapped in an insulating plastic sleeve 1, and then the insulating corrugated telescopic sleeve 7 is placed at the socket 6 of the new electric energy meter. The compressed insulating corrugated telescopic sleeve 7 exposes the bare wire 4 of the wire, and is connected to the plug of the new electric energy meter. At the corresponding position of the base 6, rotate the clamping sleeve in the opposite direction to loosen the insulating plastic sleeve 1, take out the current wire in the plug hole 9 and replace it with a new meter. When loosening the clamping sleeve 2, the insulating corrugated telescopic sleeve 7 Stretch toward one end of the clamping sleeve 2, release the pressure of clamping the wire, take out the wire insulation tube from the opening 7-1 of the telescopic sleeve and the opening 1-3 of the plastic sleeve, complete the meter replacement operation of one wire, and replace the other wires. The operation method is the same and the replacement of the electric energy meter is completed in sequence. It can be seen that in the present invention, when replacing the meter, since the wires are first covered in the insulation device and then the bare wires 4 on the old electric energy meter are removed, the original method of workers first removing the bare wires on the old electric energy meter is changed. This operating mode of inserting an insulation device prevents workers from coming into contact with bare wires, thereby preventing electric shock accidents.

The front ends of the insulating plastic sleeve 1 and the clamping sleeve 2 are both tapered, so that when the clamping sleeve 2 and the insulating plastic sleeve 1 are rotated and tightened, the pressure for the diameter reduction of the insulating plastic sleeve 1 can be increased, making the insulating plastic sleeve 1 more elastic. The copper sheet 5 and the wire can be tightly clamped, which increases the pressure of fixing the wire and prevents the insulating plastic sleeve 1 from slipping on the wire. In addition, at least two elastic copper sheets 5 are provided, which increases the contact area between the bare wire section of the wire and ensures the conduction of the wire and prevents the formation of an open circuit. The clamping sleeve 2 is set in a hexagonal cylindrical shape. The hexagonal shape and long length are convenient for workers to grasp and prevent slipping during tightening. In addition, the external thread on the insulating plastic sleeve 1 is set to be shorter, so that it can be tightened quickly.

Since the insertion hole 9 on the clamping sleeve 2 is provided with an insulating rubber pad 3, and the wrapping range of the insulating rubber pad 3 is large, it can prevent electric shock when inserting the current wire of each phase. In addition, the clamping The tight sleeve 2 can also be made of hard plastic, which can also further play an insulating role to avoid electric shock accidents.

Claims (5)

1. The utility model provides a wiring protection device of electrified replacement electric energy meter which characterized in that: the insulating plastic sleeve (1) with external threads and the clamping sleeve (2) with internal threads are arranged, the wall of the insulating plastic sleeve (7), the insulating plastic sleeve (1) and the wall of the clamping sleeve (2) are respectively provided with an opening penetrating through the wall along the axial direction, one end of the insulating plastic sleeve (7) is fixedly connected with the insulating plastic sleeve (1), the opening of the insulating plastic sleeve (1) is communicated with the opening of the insulating plastic sleeve (7) at the same side, at least two elastic copper sheets (5) extending along the axial direction are fixedly arranged in the insulating plastic sleeve (1), the elastic copper sheets (5) are respectively positioned on the inner side wall of the insulating plastic sleeve (1), the extending ends of the elastic copper sheets (5) extend into the insulating plastic sleeve (7), the wall of the clamping sleeve (2) is provided with holes (9) corresponding to the through holes (1-2) of the insulating plastic sleeve (1) respectively, the elastic copper sheets (5) are respectively positioned on the wall of the insulating plastic sleeve (1) and are screwed with the inner side wall of the insulating plastic sleeve (1) respectively, the elastic copper sheets (5) are screwed down to the central threads of the insulating plastic sleeve (1) through the inner threads, and the plug wire hole (9) is aligned with the via hole (1-2) of the insulating plastic sleeve (1).

2. The connection protection device for live replacement of an electric energy meter of claim 1, wherein: the front end of the external thread of the insulating plastic sleeve (1) is provided with a conical reducing guide section (1-1), and the front end of the clamping sleeve (2) is provided with a conical reducing compression section (2-1) which is matched with the reducing guide section (1-1) of the insulating plastic sleeve (1).

3. The connection protection device for live replacement of an electric energy meter of claim 1, wherein: the shape of the clamping sleeve (2) is a six-edge long cylinder, and the length of the screw thread is 1/6 of the total length of the clamping sleeve (2).

4. The connection protection device for live replacement of an electric energy meter of claim 1, wherein: the clamping sleeve (2) is made of steel or hard plastic.

5. The connection protection device for live replacement of an electric energy meter of claim 1, wherein: insulating rubber pads (3) are arranged around the inner wall of the plug wire hole (9) on the clamping sleeve (2).