CN209913242U

CN209913242U - Lightning current leading-out system of power transmission line

Info

Publication number: CN209913242U
Application number: CN201920940451.1U
Authority: CN
Inventors: 艾婞
Original assignee: Wuhan Xingmiao Technology Co ltd
Current assignee: Wuhan Xingmiao Technology Co ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-01-07
Anticipated expiration: 2029-06-21

Abstract

The utility model is suitable for a lightning protection technical field provides a transmission line lightning current draws forth system, connect ware, downlead and earthing device including connecing the sudden strain of a muscle, still include the spool, the arrester is including connecing sudden strain of a muscle portion and basal portion, the basal portion includes mounting plate, and fixes hollow cover on the mounting plate, the conducting rod has been inserted in the hollow cover, downlead one end through drawing forth jogged joint to conducting rod bottom, the other end passes behind the spool with earthing device's earth connection is connected, and the hookup location of lead-out wire and earth connection is located the spool and is close to spool tail end position. The system is convenient to install and transport, light in weight, low in cost and good in corrosion resistance.

Description

Lightning current leading-out system of power transmission line

Technical Field

The utility model belongs to the technical field of the lightning protection, especially, relate to a transmission line lightning current draws forth system.

Background

When a power transmission line is struck by lightning, the lightning is generally guided to the ground grid through an overhead ground wire and a tower and then discharged to the underground. Under normal conditions, as long as the grounding resistance value reaches the standard, no counterattack lightning and no shielding lightning are generated. However, the power supply bureau is in the district that the lightning thunderbolt density is large, the lightning current value is large, contact resistance still exists between the iron tower and the ground grid, and when the lightning strikes the iron tower, the lightning cannot be rapidly discharged into the ground, so counterattack lightning and shielding failure lightning are generated, and the normal operation of the power transmission line is damaged.

In order to solve the lightning protection problem, lightning needs to be led underground, generally, the lightning current leading-out system is realized through a lightning current leading-out system, the system comprises a lightning receptor and a down conductor, and a grounding device is designed at the tail end of the down conductor to form a complete lightning current leading-out system formed by the links of lightning receptor, down conductor, grounding and the like. There are some problems with the current systems:

1. the outgoing line is generally arranged on the side wall of the lightning receptor and exposed outside, and the connecting position is easy to corrode;

2. the lead-out wire is exposed and corroded for a long time;

3. the lightning receptor is high in height, heavy in weight and inconvenient to transport and install;

4. the connection position of the lead-out wire and the grounding device is easy to corrode.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, an object of the present invention is to provide a lightning current extraction system for a power transmission line, so as to solve the above problems.

The utility model adopts the following technical scheme:

the lightning current leading-out system of the power transmission line comprises a lightning connector, a down lead, a grounding device and a line tube, the lightning receptor comprises a lightning receptor and a base part, the lightning receptor comprises a connecting piece, a lightning receiving ball and a lightning receiving needle from bottom to top respectively, the bottom of the connecting piece is internally provided with a threaded hole, the base part comprises an installation bottom plate, and a hollow sleeve fixed on the mounting base plate, a conductive rod is inserted in the hollow sleeve, the top of the conductive rod extends out of the hollow sleeve and is tightly screwed into the threaded hole, the mounting plate is just right conducting rod bottom position is opened has the hole of drawing forth, the downlead one end is passed through draw forth the hole and be connected to the conducting rod bottom, the other end passes behind the spool with earthing device's earth connection is connected, and the hookup location of lead-out wire and earth connection is located the spool and is close to spool tail end position.

Furthermore, the conducting rod comprises a thin rod section positioned in the hollow sleeve and a thread section exposed out of the top of the hollow sleeve, the diameter of the thread section is larger than that of the thin rod section, and the top of the thread section is conical.

Furthermore, the tail end of the slender rod section is screwed with a locking nail, a conducting ring penetrates through the locking nail, and the outgoing line is connected with the conducting ring.

Furthermore, the tail end of the outgoing line is connected with a first clamping plate, the grounding wire of the grounding device is connected with a second clamping plate, and the first clamping plate and the second clamping plate are locked through bolts.

Further, the tail end of the line pipe is covered with an end cover, and a grounding wire of the grounding device penetrates through the end cover.

The utility model has the advantages that:

1. the outgoing line is led out from the tail end of the conducting rod and is shielded by the mounting bottom plate, so that the outgoing line cannot be corroded by rainwater and dirt, and the conducting reliability of the connecting position is ensured;

2. the outgoing line penetrates into the line pipe to avoid external direct contact;

3. the lightning receptor is divided into two sections, the two sections can be disconnected, and the two sections are connected through threads, so that the lightning receptor is convenient to transport and install; meanwhile, the base part of the lightning arrester is provided with a hollow sleeve and a conducting rod structure, the thread section of the conducting rod is thicker than that of the thin rod section, so that the whole conducting rod is lighter in weight, the hollow sleeve is arranged on the periphery of the thin rod section, the conducting rod is prevented from being exposed outside, the conducting rod can be made of a low-cost conducting material, a high-cost alloy material is not required, the conducting performance is ensured, and the cost is reduced;

4. the connection position of the outgoing line and the grounding device is positioned in the line pipe and is also not corroded.

Drawings

Fig. 1 is a structural diagram of a lightning current extraction system of a power transmission line provided by an embodiment of the present invention;

FIG. 2 is a view showing the structure of the tail end of the conductive rod;

fig. 3 is a connection structure diagram of the lead wire and the ground wire of the grounding device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In order to explain the technical solution of the present invention, the following description is made by using specific examples.

Fig. 1 shows the structure of the lightning current extraction system for the power transmission line provided by the embodiment of the present invention, and only the relevant parts of the embodiment of the present invention are shown for convenience of description.

The lightning current leading-out system of the power transmission line comprises a lightning arrester 1, a down conductor 2 and an earthing device 3, and further comprises a line tube 4, the lightning arrester 1 comprises a lightning arresting part and a base part, the lightning arresting part is a connecting piece 11, a lightning arresting ball 12 and a lightning arresting needle 13 from bottom to top respectively, a threaded hole is formed in the bottom of the connecting piece 11 inwards, the base part comprises an installation bottom plate 14 and is fixed to a hollow sleeve 15 on the installation bottom plate 14, a conducting rod 16 is inserted into the hollow sleeve 15, relative rotation cannot occur between the hollow sleeve 15 and the conducting rod 16, the top of the conducting rod 16 stretches out the hollow sleeve 15 and is tightly screwed into the threaded hole, the installation bottom plate 14 is just opposite to the bottom end of the conducting rod, one end of the down conductor 2 is connected to the bottom end of the conducting rod 16, and the other end of the down conductor 4 is connected with an earthing wire 31 of the earthing device 3, the connection position of the outgoing line and the grounding line is positioned in the line pipe and close to the tail end of the line pipe.

In this structure, the conductive rod 16 includes a thin rod segment 161 located inside the hollow sleeve and a threaded segment 162 exposed out of the top of the hollow sleeve, the diameter of the threaded segment 162 is larger than that of the thin rod segment 161, and the top of the threaded segment is tapered.

During the use, will dodge and connect the ware to install in the take the altitude position, it is concrete, fix the mounting plate earlier, then twist and connect the portion of dodging, then arrange the spool, worn the lead-out wire in the spool, then fixed the thin rod section tail end to the conducting rod with the lead-out wire head end, the lead-out wire end is connected with earthing device's earth connection, and the hookup location pushes away in the spool, and earthing device buries underground together with the earth connection. When lightning current flows, the lightning current instantly flows into the ground from the lightning receiving pin, the lightning receiving ball, the connecting piece, the conducting rod, the outgoing line and the grounding device, and the safety is guaranteed. The leading-out wire is led out from the tail end of the conducting rod and is shielded by the mounting bottom plate, so that the leading-out wire cannot be corroded by rainwater and dirt, and the conducting reliability of the connecting position is ensured; in addition, the outgoing line penetrates into the line pipe, so that the direct contact of the outside can be avoided, and the connecting position of the outgoing line and the grounding device is positioned in the line pipe and is not corroded. In the embodiment, the lightning receptor is divided into two sections, the two sections can be disconnected, and the two sections are connected through threads, so that the lightning receptor is convenient to transport and install; meanwhile, the base part of the lightning arrester is set into a hollow sleeve and a conducting rod structure, the thread section of the conducting rod is thicker than that of the thin rod section, so that the whole conducting rod is lighter in weight, the hollow sleeve is arranged on the periphery of the thin rod section, the conducting rod is prevented from being exposed outside, the conducting rod can be made of a low-cost conducting material, a high-cost alloy material is not required to be used, and the cost is reduced while the conducting performance is ensured.

As a specific structure, as shown in FIG. 2, the tail end of the slender rod section 161 is screwed with a locking pin 18, the locking pin 18 is penetrated with a conductive ring 19, and the outgoing line 2 is connected with the conductive ring 19, which facilitates the fixing of the outgoing line. In addition, as shown in fig. 3, a first clamping plate 21 is connected to the end of the lead wire 2, a second clamping plate 32 is connected to the ground wire 31 of the grounding device 3, the first clamping plate 31 and the second clamping plate 32 are locked by bolts, an end cover 41 is covered on the tail end of the conduit 4, and the ground wire of the grounding device passes through the end cover 41.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A lightning current leading-out system of a power transmission line comprises a lightning receptor, a down lead and a grounding device, characterized in that the system also comprises a line pipe, the lightning receptor comprises a lightning receptor and a base part, the lightning receiving part is respectively provided with a connecting piece, a lightning receiving ball and a lightning receiving needle from bottom to top, the bottom of the connecting piece is internally provided with a threaded hole, the base part comprises an installation bottom plate, and a hollow sleeve fixed on the mounting base plate, a conductive rod is inserted in the hollow sleeve, the top of the conductive rod extends out of the hollow sleeve and is tightly screwed into the threaded hole, the mounting plate is just right conducting rod bottom position is opened has the hole of drawing forth, the downlead one end is passed through draw forth the hole and be connected to the conducting rod bottom, the other end passes behind the spool with earthing device's earth connection is connected, and the hookup location of lead-out wire and earth connection is located the spool and is close to spool tail end position.

2. The power transmission line lightning current extraction system of claim 1, wherein the conductive rod comprises a thin rod section located inside the hollow sleeve and a threaded section exposed at the top of the hollow sleeve, the threaded section has a diameter larger than that of the thin rod section, and the top of the threaded section is tapered.

3. The lightning current leading-out system of the power transmission line according to claim 2, wherein a locking nail is screwed into the tail end of the slender rod section, a conductive ring is penetrated through the locking nail, and the leading-out wire is connected with the conductive ring.

4. The lightning current leading-out system of claim 3, wherein the tail end of the outgoing line is connected with a first clamping plate, the grounding wire of the grounding device is connected with a second clamping plate, and the first clamping plate and the second clamping plate are locked through bolts.

5. The power transmission line lightning current leading-out system of claim 4, wherein the tail end of the conduit is covered with an end cover, and a grounding wire of the grounding device penetrates through the end cover.