CN205429192U - Novel low pressure earth connection device - Google Patents

Abstract

The utility model relates to a new low-voltage grounding wire device, which is composed of three spiral clamps, a straight plug-in clamp, several strands of soft copper wires and insulating operating rods, wherein the three spiral clamps are respectively connected with three soft copper wires. The other ends of the three annealed copper wires are assembled into a bus through a wire connector, the other end of the bus is connected to the in-line clamp, and the insulating operating rod is separately set. The utility model has the advantages of reasonable design, simple operation, and compact design of the chuck, which not only solves the problem that the low-voltage bus bar is difficult to seal and hang in the narrow space of the low-voltage switchgear, but also provides a convenient wire connection device for the maintenance staff without repeated repetitions Work, reduce costs, convenient and fast, save time, improve work efficiency, ensure maintenance safety, and are suitable for vigorous promotion and use in the electric power industry.

Description

A new type of low-voltage grounding wire device

technical field

The utility model belongs to the field of electric power safety, and relates to a safety maintenance auxiliary tool, in particular to a novel low-voltage grounding wire device.

Background technique

In electric power engineering, according to the requirements in the national standards of "Portable Grounding and Grounding Short Circuits for Low-Voltage Cabinets" (DL/T879-2004) and "Portable Grounding and Grounding Short Circuit Devices for Live Work": After the lines and equipment are indeed without voltage, all phase and neutral wires can be grounded and short-circuited to prevent reverse power transmission.

At the actual work site, due to the relatively compact internal layout of some low-voltage switch boxes, such as A-type boxes, CF boxes, and FDF boxes, the low-voltage busbars are relatively short, and the cable head lead strips are too small, so it is very difficult to seal the land. The existing low-voltage grounding wires are all fixed in size, which cannot be adapted to different low-voltage switch boxes. It is necessary to manufacture corresponding grounding wires according to the size of the low-voltage switch box. Small, it is very easy to accidentally touch the charged body and cause a short circuit. It will directly cause danger to the operator, and at the same time affect the work efficiency and the accuracy of the safety maintenance work.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a new low-voltage grounding wire device with simple operation, safe use, fast and efficient maintenance.

The utility model solves the problems of the technologies described above by adopting the following technical solutions:

A new type of low-voltage grounding wire device, which consists of three screw-type chucks, an in-line chuck, several strands of annealed copper wires and an insulated operating rod, wherein the three helical-type chucks are respectively connected to three of the annealed copper The other ends of the three annealed copper wires are assembled into a bus through a hub, the other end of the bus is connected to the in-line chuck, and the insulating operating rod is separately provided.

Moreover, the screw chuck includes a transverse screw, a connecting nut, a ground connecting plate, a lock nut and a branch lug, one end of the transverse screw is coaxially threaded to a force nut; the other end of the transverse screw is coaxially fixed The connecting nut is installed, and the other end of the connecting nut is coaxially provided with a grounding bolt thread groove; the lock nut is coaxially threaded between the booster nut and the connecting nut, and the lock nut The ground connection plate is coaxially and movably connected with the connecting mother, and the lower end of the ground connection plate is connected to the installation end of the branch lug through two vertically spaced screws in sequence, and the other end of the branch lug is One end is connected to the annealed copper wire.

Moreover, a spring washer is arranged between the mounting end of the branch lug and the screw; a pin is installed on the outer surface of the force nut perpendicular to the transverse screw rod.

Moreover, the in-line chuck includes a U-shaped plate, a longitudinal screw and a bus lug, the top plate of the U-shaped plate is vertically mounted on the longitudinal screw, and a movable jaw is fixed at one end of the longitudinal screw. The lower end of the movable jaw is between the upper top plate and the lower bottom plate of the U-shaped plate, and the bus lug is fixed on the vertical right-angled side of the U-shaped plate by screws, and the other end of the bus lug is connected to the bus.

Moreover, the insulating operating rod is composed of a main rod and a handle, the handle is vertically mounted on the main rod, and the two ends of the main rod are coaxially provided with a built-in large sleeve wrench end and a built-in small sleeve. Pipe wrench end.

Advantage and beneficial effect of the present utility model are:

1. The utility model is composed of three screw-type clamps, one straight-insert clamp, several strands of annealed copper wire and an insulating operating rod, and the three screw-type clamps are just screwed into the switch cabinet with an additional operating rod. On the ignition nut of the ABC three-phase lower port of the air switch, the in-line chuck is clamped on the zero-phase busbar in the switch cabinet to realize low-voltage reliable sealing, prevent reverse power transmission, and do not need to be connected separately to ensure the accuracy of maintenance ,Improve work efficiency.

2. One end of the transverse screw in the spiral chuck of the utility model is threadedly connected to the booster nut, and the other end is fixedly installed with the connecting nut. The linkage of the connecting nut is realized by rotating the booster nut. At the same time, a lock nut is set, and the grounding plate is controlled by adjusting the lock nut. , Increase the contact surface of the ground wire chuck, make the connection tight and controllable, and will not cause arcing short circuit or electrodynamic force to cause the chuck to fly off when a large current passes.

3. The U-shaped plate frame structure of the in-line chuck of the utility model is simple, strong and stable, and it is convenient to insert the ground wire port during use, and the tension can be adjusted through the longitudinal screw and the movable jaw to maintain the stability of the ground wire. , Improve maintenance safety, convenient and fast, simple and efficient operation.

4. The insulating operating rod of the utility model integrates a large wrench and a small wrench, which is convenient to use and can prevent electric shock and arc burns.

5. The utility model has reasonable design, simple operation, and compact design of the chuck, which not only solves the problem that the low-voltage bus bar is difficult to seal and hang in the narrow space of the low-voltage switchgear, but also avoids the possibility of mistakenly touching the charged body due to the dense outlets of the low-voltage cabinet and small spacing It causes the short circuit to threaten the life safety of the staff, and also provides a convenient wire connection device for the maintenance staff, which does not need to repeat the work many times, reduces costs, is convenient and fast, saves time, improves work efficiency, and ensures the safety of maintenance. It is suitable for Vigorously promote the use in the power industry.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a partially enlarged schematic diagram of the screw type chuck in Fig. 1;

Fig. 3 is a partially enlarged schematic diagram of the in-line chuck in Fig. 1;

FIG. 4 is a partially enlarged schematic diagram of the insulating operating rod in FIG. 1 .

detailed description

The utility model is described in further detail below through specific examples, the following examples are only descriptive, not limiting, and cannot limit the protection scope of the utility model with this.

A new type of low-voltage grounding wire device, as shown in Figure 1, consists of three screw-type chucks 1, one in-line chuck 3, several strands of annealed copper wires 2 and an insulating operating rod 5. Wherein said three spiral chucks are respectively connected to three 3-meter-long described annealed copper wires, and the other ends of the three annealed copper wires are assembled into a bus through a hub 4, and the other end of said bus is connected to a The in-line chuck is described above, and the insulating operating rod is separately provided for installing and dismounting the grounding wire.

As shown in Figure 2, the screw chuck includes a transverse screw 10, a connecting nut 7, a ground connection plate 8, a lock nut 9, and a branch lug 15, and one end of the transverse screw is coaxially threaded to a booster nut 11. The outer surface of the booster nut is perpendicular to the transverse screw rod and is equipped with a pin 12; the other end of the transverse screw rod is coaxially fixed with the connecting nut, and the other end of the connecting nut is coaxially built with a grounding bolt wire. Buckle groove 6; the lock nut is coaxially threaded between the booster nut and the connecting nut, and the grounding plate is coaxially and movably connected between the lock nut and the connecting nut. The lower end of the joint plate is connected to the installation end of the branch lug through two screws 13 arranged vertically in sequence, and the other end of the branch lug is connected to the annealed copper wire. Spring washers 14 are arranged between the screws.

As shown in Figure 3, the in-line chuck includes a U-shaped plate 16, a longitudinal screw 17 and a bus lug 19, the top plate of the U-shaped plate is vertically worn through the longitudinal screw, and one end of the longitudinal screw is fixed Movable jaws 18 are installed, and the lower end of the movable jaws is between the upper top plate and the lower bottom plate of the U-shaped plate, and the bus lugs are fixed by screws on the vertical right-angle sides of the U-shaped plate, The other end of the bus lug is connected to the bus.

As shown in Figure 4, the insulating operating rod is composed of a main rod 21 and a handle 22, the handle is vertically mounted on the main rod, and a built-in large sleeve is coaxially arranged at both ends of the main rod Wrench end 20 and built-in small sleeve wrench end 23.

The booster nut M10 is coaxially linked with the connecting nut; the pin φ3×18 is used to fasten the booster nut and the transverse screw; the lock nut M14 is used to fasten or loosen the ground connection plate ; the ground connecting plate is 74×24× ⁸ ; the connecting mother M12×φ30×62; the spring washer φ8 is used for fastening screws; The cross-sectional area of the annealed copper wire is not less than 25mm ² .

The material of the screw-type chuck and the in-line chuck is mainly cast iron, the material of the ground connection plate is aluminum, and the material of the insulating operating rod is insulating glass fiber reinforced plastic.

Working principle of the utility model:

In the actual land sealing operation, use the operating rod to screw the screw type chuck on the ignition nut of the ABC three-phase lower port of the air switch in the switch cabinet, and clamp the in-line chuck on the zero-phase busbar in the switch cabinet. Realize low-voltage reliable land closure and prevent reverse power transmission. The specific operation is as follows:

When installing the ground wire: First, connect the 25mm ² multi-strand annealed copper wire to the clamp head of the ground wire through the branch lug. Then use the large casing wrench end of the insulating operating rod to loosen the lock nut, and the grounding connection plate will naturally sag to prevent the linkage between the grounding connection plate and the connecting female; Screw the threaded groove of the grounding bolt into and fasten the threaded end of the intended grounding bolt; then screw the lock nut tightly to the grounding plate with the large sleeve wrench end of the insulating operating rod to fix the cable; finally connect the in-line chuck to the Enter the zero row of the low-voltage switch box to achieve reliable grounding.

When removing the ground wire: first loosen the lock nut to loosen the ground wire connection plate; then use the insulating operating rod to insert the afterburner nut and rotate it to the left to remove the screw clamp.

The above operation and application enterprises have passed GB/T19001, ISO9001 quality management system certification. During operation, strictly abide by the "Electricity Safety Operation Regulations" and the safety operation regulations of portable grounding and grounding short-circuit lines.

Claims (5)

1. a New Low Voltage grounding wire device, it is characterized in that: if being made up of three spiral dops, a direct insertion dop carried interest annealed copper wire and insulating bar, wherein said three spiral dops connect three described annealed copper wires respectively, article three, the other end of described annealed copper wire accumulates a bus by remittance line device, the other end of described bus connects described direct insertion dop, and described insulating bar is the most separately positioned.

A kind of New Low Voltage grounding wire device the most according to claim 1, it is characterised in that: described spiral dop includes transverse screw, connects mother, ground connection yoke plate, locknut and tap wire nose, and described transverse screw one end coaxial threaded connects afterburning nut；The other end at described transverse screw is coaxially fixed with described connection mother, and the other end of this connection mother is the most built-in offers earth stud screw thread groove；Described locknut coaxial threaded is connected between described afterburning nut and described connection mother, described ground connection yoke plate coaxially it is connected with between this locknut with the described mother of connection, the lower end of this ground connection yoke plate screw that vertical spacing is arranged successively by two connects the installation end of described tap wire nose, and the other end of this tap wire nose connects described annealed copper wire.

A kind of New Low Voltage grounding wire device the most according to claim 2, it is characterised in that: between the installation end and described screw of described tap wire nose, it is provided with spring washer；It is perpendicular to described transverse screw at described afterburning nut outer surfaces and is coated with pin.

A kind of New Low Voltage grounding wire device the most according to claim 1, it is characterized in that: described direct insertion dop includes U-shaped plate, longitudinal screw and total Wiring nose, described U-shaped plate upper plate vertically installs described longitudinal screw, it is fixed with moving jaw in one end of this longitudinal screw, the lower end of this moving jaw is between upper plate and the lower shoe of described U-shaped plate, being fixed with described total Wiring nose by screw on the straight vertical arm of angle of described U-shaped plate, the other end of this total Wiring nose connects described bus.

A kind of New Low Voltage grounding wire device the most according to claim 1, it is characterized in that: described insulating bar is made up of mobile jib and handle, described handle is vertically threaded onto on described mobile jib, is coaxially arranged with built-in big socket wrench end and built-in small casing spanner end respectively at the two ends of described mobile jib.