CN205452569U - Connecting device is drawn to ground connection - Google Patents

Abstract

The utility model relates to the technical field of grounding devices for overhead transmission lines in the electric power industry, in particular to a grounding lead-up connection device. The grounding upper bodies of existing pole towers are mostly metal rods, which are connected to the tower body and the grounding body by welding, which makes on-site construction difficult and low in efficiency. The utility model adopts the segmented structure of the upper ground lead and the lower ground lead. The base of the tower is in contact with the protective cap, which can be processed and formed in the factory according to the specifications of the protective cap to meet the requirements of high-quality engineering standards; the material of the lower ground lead wire is easy to form, and the on-site connection to the ground body is easy to adjust. The construction is convenient and fast, eliminating potential safety hazards and reducing The work difficulty is improved, and the construction efficiency is improved.

Description

Ground lead connection device

technical field

The utility model relates to the technical field of grounding devices for overhead transmission lines in the electric power industry, in particular to a grounding lead-up connection device.

Background technique

At present, the grounding upper body of the transmission line tower is generally a metal rod, and its installation method is mostly directly welded and installed on the grounding body during the civil construction process. When the tower foundation and the grounding body are backfilled, the lower section of the grounding upper body is buried together. The upper part of the grounding upper body is exposed on the ground, and then the tower is assembled and installed; after the construction of the concrete protective cap at the base of the iron tower is completed, the ground part of the grounding upper body is connected to the tower body. Since it is impossible to determine the specific position of the base of the iron tower and its protective cap during the civil construction of the grounding body and the tower foundation, it is difficult to reserve the length of the upper half (above the ground) of the grounding upper body accurately. In , it often appears that the length of the reserved segment of the upper body is inappropriate. In addition, the metal material of the upper body of the grounding guide is hard, and its lower part is fixedly connected to the grounding body and has been buried. It is difficult to bend and shape the upper part, and it is very difficult to join with the connection point of the iron tower. The stress of the upper body itself is difficult to eliminate, and the connection between the upper body and the iron tower is easy to break, posing a safety hazard, and its shape cannot match the protective cap at the base of the iron tower, making it difficult to meet the engineering standard process requirements.

Contents of the invention

The purpose of this utility model is to provide a connection device for grounding guides. The upper and lower parts of the grounding guide body are designed in sections, which can be combined and installed at the construction site, which overcomes the defects of existing products, reduces the difficulty of work, and improves the work efficiency.

The purpose of this utility model is achieved through the following technical solutions:

A grounding connection device, comprising a fastening plate, an upper grounding wire, an upper connection terminal, a lower connection terminal, and a lower grounding wire made of soft material;

There are connecting holes on the fastening plate; the upper terminal and the lower terminal are both rectangular plates, and the boards of the upper and lower terminals are equipped with pressure plates through bolts;

The upper grounding lead is a metal grounding rod made of hard material, and its upper part fits the shape of the base of the iron tower; the fastening plate, the upper grounding The connecting terminal is fixed at the lower end of the upper grounding wire;

The lower ground lead wire (5) is a braided soft graphite ground electrode, and the two ends of the lower ground lead wire are respectively crimped and fixed on the upper terminal and the lower terminal by crimping plates.

Further, the upper and lower terminals are provided with crimping grooves with an arc-shaped cross section, and the effective crimping (overlapping) length of the lead-in wires is not less than 6 times the diameter of the upper grounding lead-in wire.

Further, the upper connection terminal and the lower connection terminal are respectively provided with 2 to 4 wire crimping plates.

Further, the upper ground lead wire rod body is stepped.

Further, the connecting hole of the fastening plate is a long through hole.

The utility model has the advantages of simple and reasonable structure, the upper and lower parts of the ground lead wire are designed in sections, the upper section (the upper ground lead wire) is in contact with the protective cap at the base of the iron tower, and its hard rod body can be processed in the factory according to the specifications of the protective cap Formed to meet the requirements of high-quality engineering standards; the lower section (lower ground lead wire) is made of soft material that is easy to deform, and is used to connect the ground body on site. The construction is convenient and fast, which reduces the difficulty of work, improves construction efficiency, and avoids lead wires The influence of internal stress on the connection point eliminates potential safety hazards; solves the problems of difficult operation and low work efficiency in the prior art.

The technical solution of the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

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

Fig. 2 is the use state figure of the utility model.

detailed description

In the figure: 1. fastening plate, 11. connection hole, 2. upper ground lead and upper wire, 3. upper connection terminal, 4. pressure plate, 5. lower ground lead and upper wire, 6. lower connection terminal, 7. protective cap , L, the effective crimping length of the lead wire.

Example 1

As can be seen from Figures 1 to 2, the technical solution of the utility model includes a fastening plate 1, an upper grounding lead wire 2, a lower grounding lead wire 5, an upper connecting terminal 3, and a lower connecting terminal 6;

There are two connection holes 11 for connecting with the iron tower on the fastening plate 1, and the connection holes are long through holes; the upper connection terminal 3 and the lower connection terminal 6 are rectangular metal plates, and the plates of the upper and lower connection terminals The body is equipped with a pressure plate 4 through bolts;

The fastening plate 1, the upper ground lead wire 2 and the upper connection terminal 3 have an integrated structure. The upper ground lead wire 2 is a metal ground rod made of hard material. The construction drawings of the cap and the iron tower are made into a ladder shape in the processing plant to make the protective cap fit better; the fastening plate 1 is welded and fixed on the top of the upper ground lead wire 2; the upper terminal 3 is welded and fixed on the upper ground lead wire 2 lower end.

The lower ground lead and the upper line 5 adopt the GL-R20 soft graphite ground electrode of Henan Gaoli Lightning Protection Technology Co., Ltd. The ground electrode is made of non-metallic conductive material, which is braided and formed after high-temperature puffing processing. It has stable performance, low resistivity, and is easy to deform. , high and low temperature resistance, acid and alkali corrosion resistance, long service life, safety and environmental protection. The two ends of the lower ground lead upper wire 5 are respectively crimped and fixed on the upper terminal 3 and the lower terminal 6 through the crimping plate 4; Increase the contact area; in order to ensure that a good conductive path is formed between the upper grounding wire and the upper and lower terminals after crimping, 2 to 4 crimping plates 4 are installed on the upper terminal and the lower terminal respectively, and ensure that the upper wire The effective crimping length L is not less than 6 times the diameter of the upper grounding lead wire to reduce the contact resistance.

The grounding lead-up device of the utility model is designed in upper and lower sections, which effectively solves the problems in the prior art that the grounding lead-up body is difficult to be shaped according to the site conditions and construction is difficult; Made of metal materials, according to the design drawings of the tower and its base protection cap, it is processed and formed by equipment in the factory to meet the requirements of high-quality engineering standards; during the civil construction process of the tower foundation, the lower terminal 6 is welded and fixed on the grounding body, and the The two ends of the soft lower leading wire (lower grounding leading wire) are respectively crimped and connected to the upper and lower terminals 3 and 6, and then the tower base and the grounding body are backfilled. After the iron tower is assembled and the construction of the concrete protective cap is completed, the fastening plate 1 on the top of the upper grounding lead wire is connected and fastened to the reserved hole of the iron tower through bolts. Since the upper and lower ground leads are easy to shape, the construction is convenient and fast, which greatly reduces the difficulty of on-site operations, improves work efficiency, avoids the influence of internal stress on the connection points of the lead and upper leads, and eliminates potential safety hazards.

Finally, it should be noted that: the above examples are used to illustrate the technical solution of the utility model rather than to limit it. Those skilled in the art can modify the implementation or equivalently replace some technical features without departing from the technology of the utility model. The essence of the scheme should be covered within the scope of protection required by the utility model.

Claims (4)

1. attachment means on a grounding lead, it is characterised in that: include fastening plate (1), upper grounding lead is reached the standard grade (2), the lower grounding lead of upper connecting terminal (3), lower connecting terminal (6) and soft material matter reaches the standard grade (5)；

Fastening plate (1) is provided with connecting hole (11)；Upper connecting terminal (3), lower connecting terminal (6) are rectangular slab, by bolt equipped with tension disc (4) on the plate body of upper and lower binding post；

Upper grounding lead is reached the standard grade the metallic ground bar that (2) are hard material, and its epimere is stepped with steel tower base in contact；

Fastening plate (1), upper grounding lead is reached the standard grade (2) and upper connecting terminal (3) is structure as a whole, and fastening plate (1) is fixed on grounding lead and reaches the standard grade the top of (2), and upper connecting terminal (3) is fixed on grounding lead and reaches the standard grade the lower end of (2)；

Lower grounding lead is reached the standard grade the software graphite earthing pole that (5) are knitting forming, and the reach the standard grade two ends of (5) of lower grounding lead are fixed on upper connecting terminal (3) and lower connecting terminal (6) by tension disc (4) crimping respectively.

Attachment means on a kind of grounding lead the most according to claim 1, it is characterized in that: described upper connecting terminal (3) and lower connecting terminal (6) are provided with the line ball groove that cross section is curved, it draws the effective crimping length reached the standard grade not less than on upper grounding lead 6 times of linear diameter.

Attachment means on a kind of grounding lead the most according to claim 1, it is characterised in that: described upper connecting terminal (3) and lower connecting terminal (6) are respectively provided with 2～4 road tension discs (4).

Attachment means on a kind of grounding lead the most according to claim 1, it is characterised in that: the connecting hole (11) of described fastening plate (1) is long through-hole.