阅读说明：本技术 一种火花刺型柔性接地模块以及接地施工方法 (Spark-stab type flexible grounding module and grounding construction method ) 是由 张国锋 务孔永 吕坤阳 胡松江 尹栓柱 张明磊 陈见甫 邢远 陈瑞斌 郑伟 陈晓 于 2020-07-30 设计创作，主要内容包括：本发明涉及一种火花刺型柔性接地模块以及接地施工方法,包括第一石墨接地带、第二石墨接地带、石墨导电片以及三个火花刺组件,石墨导电片的两个长边分别连接火花刺组件,第二石墨接地带沿石墨导电片的长度方向设置,第二石墨接地带的一端与石墨导电片的一端短边平齐,第二石墨接地带的另一端伸出石墨导电片设置。本发明的火花刺型柔性接地模块具有多种接地部件,三个火花刺组件分别设置在石墨导电片的其中三个边缘,每个火花刺组件均具有多个放电尖刺,整个火花刺型柔性接地模块通过石墨接地带引入整个接地网络中,当设备遭受雷击时,在泄放雷电流的过程中能够形成火花放电效应,使得接地装置周围的土壤电阻率降低,散流更加容易。(The invention relates to a spark-stab type flexible grounding module and a grounding construction method, and the spark-stab type flexible grounding module comprises a first graphite grounding belt, a second graphite grounding belt, a graphite conducting strip and three spark-stab assemblies, wherein two long edges of the graphite conducting strip are respectively connected with the spark-stab assemblies, the second graphite grounding belt is arranged along the length direction of the graphite conducting strip, one end of the second graphite grounding belt is flush with the short edge of one end of the graphite conducting strip, and the other end of the second graphite grounding belt extends out of the graphite conducting strip. The spark-plug type flexible grounding module is provided with a plurality of grounding parts, three spark-plug assemblies are respectively arranged on three edges of a graphite conducting strip, each spark-plug assembly is provided with a plurality of discharge spikes, the whole spark-plug type flexible grounding module is introduced into the whole grounding network through a graphite grounding strip, when equipment is struck by lightning, a spark discharge effect can be formed in the process of lightning current discharge, the resistivity of soil around a grounding device is reduced, and the current dissipation is easier.)

1. A spark-plug type flexible grounding module characterized in that: including first graphite earthing strip (1), second graphite earthing strip (2), graphite conducting strip (3) and three spark thorn subassembly, graphite conducting strip (3) are the rectangle structure, and first graphite earthing strip (1) and spark thorn subassembly are connected respectively to two minor faces of graphite conducting strip (3), and spark thorn subassembly is connected respectively to two long limits of graphite conducting strip (3), and second graphite earthing strip (2) set up the one side in graphite conducting strip (3), and the length direction setting of graphite conducting strip (3) is followed in second graphite earthing strip (2), and the one end of second graphite earthing strip (2) and the one end minor face parallel and level of graphite conducting strip (3), and the other end of second graphite earthing strip (2) stretches out graphite conducting strip (3) and sets up.

2. The spark-plug type flexible grounding module according to claim 1, wherein: the first graphite grounding belt (1), the second graphite grounding belt (2) and the graphite conducting strip (3) are all of graphite woven structures.

3. The spark-plug type flexible grounding module according to claim 2, wherein: the spark plug component comprises a strip-shaped metal base body (4), and a plurality of discharge spikes (5) are uniformly distributed on one side of the long edge of the metal base body (4).

4. The spark-plug type flexible grounding module according to claim 3, wherein: the metal matrix (4) of the spark plug assembly and the graphite conducting strip (3) are directly woven together, and the first graphite grounding belt (1) and the second graphite grounding belt (2) are sewn with the graphite conducting strip (3) through thin lines.

5. The spark-plug type flexible grounding module according to claim 2, wherein: spark thorn subassembly includes rectangular shape metal base (4), and one side long limit of metal base (4) is provided with a plurality of connecting holes (6) side by side, and the side terminal surface on the long limit of opposite side of metal base (4) is provided with fixed slot (7) and sliding tray (8) side by side, and fixed slot (7) and sliding tray (8) set up along the length direction of metal base (4), and the length of sliding tray (8) is longer than the length of fixed slot (7), evenly distributed has a plurality of fixed spine (9) in fixed slot (7), and fixed spine (9) are fixed to be set up in fixed slot (7), be provided with activity spine (10) in sliding tray (8), activity spine (10) comprise the spine of sliding part and evenly distributed on the sliding part, and the sliding part card is established in sliding tray (8), and the spine stretches out sliding tray (8) setting.

6. The spark-plug type flexible grounding module according to claim 1, wherein: one side of the side edge of the metal base body (4) corresponding to the sliding groove (8) is provided with a long strip-shaped adjusting hole (11), the side edge of the sliding part of the movable spine (10) corresponding to the adjusting hole (11) is provided with an adjusting handle (12), and the adjusting handle (12) extends out of the adjusting hole (11).

7. The spark-plug type flexible ground module according to claim 5 or 6, wherein: the distance between two adjacent discharge spikes (5) in the movable spikes (10) is the same as the distance between two adjacent fixed spikes (9).

8. The spark-plug type flexible grounding module according to claim 7, wherein: the length of the fixing groove (7) is the difference between the length of the sliding groove (8) and half of the distance between two adjacent fixing spikes (9).

9. A grounding construction method is characterized in that: grounding of a desk transformer or a pole switch is performed by using an armored grounding down lead, a graphite-based flexible grounding tape, a graphite-based flexible resistance reducing cloth and the spark-stab type flexible grounding module as claimed in claim 1, 2, 3, 4, 5, 6 or 8.

10. The ground engaging construction method according to claim 9, wherein: the method specifically comprises the following steps:

s1: preparation before construction

Before construction, surveying a site according to a design drawing, and determining a construction scheme, wherein the construction scheme comprises the number or the length of an armored grounding down lead, graphite-based flexible resistance reducing cloth, a spark-stab type flexible grounding module and a non-metal clamp;

s2: digging trench

Excavating a main grounding ditch on an original soil layer or a tamped bedding soil layer, and then excavating epitaxial ditches according to the number of the spark plug type flexible grounding modules;

s3: laying of ground material

Firstly, laying a layer of graphite-based flexible resistance reducing cloth in a grounding main trench, then laying a graphite-based flexible grounding belt above the graphite-based flexible resistance reducing cloth, connecting the upper end of an armored grounding down lead with a grounding part of a desk transformer or an on-column switch through a bolt, connecting the lower end of the armored grounding down lead with the graphite-based flexible grounding belt, and finally placing a spark-spine flexible grounding module in each epitaxial trench, wherein a second graphite grounding belt of the spark-spine flexible grounding module is connected with the graphite-based flexible grounding belt through a non-metal clamp;

s4: buried grounding device

Backfilling in the ground ditch, wherein stones, plastics and construction wastes are not clamped in the backfilled soil, the soil is tamped in layers during backfilling, and an anti-settling layer with the height of 100-300 mm is arranged at the upper part.

Technical Field

The invention relates to the technical field of lightning protection grounding devices, in particular to a spark plug type flexible grounding module and a grounding construction method.

Background

When the transmission line or the tower is struck by lightning, the tower grounding device releases lightning current to the ground, so that the potential of the tower is increased as little as possible, the lightning counterattack tripping rate can be reduced, and the design of the grounding device is very important for lightning protection of the transmission line. The amplitude of the lightning current is generally within the range of 20-200 kA and is far larger than the general power frequency grounding current, the current density of each part in the grounding body is increased due to the increase of the current amplitude, the electric field intensity is further increased, the current density is particularly obvious when the current density is close to the injection point of the grounding body, local spark discharge can occur when the electric field intensity exceeds the critical breakdown field intensity of soil, and the electric conductance of the soil and the size of the grounding body can be equivalently increased. Therefore, under the action of strong enough impulse lightning current, the power frequency grounding resistance of the same grounding device is larger than the impulse grounding resistance of the same grounding device, and the characteristic is the spark effect. When the thunder flows through the grounding electrode and is leaked and dispersed, great field intensity can appear around the grounding body, if the field intensity is larger than the breakdown field intensity Ec of soil, partial discharge can appear, the discharge produces the spark discharge effect in the soil contacted with the electrode in the moment, so that the physical characteristics of the soil are changed, and when the thunder flows through the grounding electrode and is leaked and dispersed, the equivalent is that the size of the grounding electrode is increased.

Disclosure of Invention

The present invention is directed to solve the above-mentioned problems and to provide a spark plug type flexible grounding module and a grounding construction method.

In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a flexible ground connection module of spark thorn type, includes first graphite grounding strap, second graphite grounding strap, graphite conducting strip and three spark thorn subassembly, the graphite conducting strip is the rectangle structure, and first graphite grounding strap and spark thorn subassembly are connected respectively to two minor faces of graphite conducting strip, and spark thorn subassembly is connected respectively on two long limits of graphite conducting strip, and second graphite grounding strap sets up in one side of graphite conducting strip, and second graphite grounding strap sets up along the length direction of graphite conducting strip, and the one end of second graphite grounding strap and the one end minor face parallel and level of graphite conducting strip, the other end in second graphite grounding strap stretch out the graphite conducting strip setting.

The spark-plug type flexible grounding module is further optimized as follows: the first graphite grounding belt, the second graphite grounding belt and the graphite conducting strip are all of graphite woven structures.

The spark-plug type flexible grounding module is further optimized as follows: the spark plug component comprises a strip-shaped metal base body, and a plurality of discharge spikes are uniformly distributed on one side of the long edge of the metal base body.

The spark-plug type flexible grounding module is further optimized as follows: the metal matrix of the spark plug assembly and the graphite conducting strip are directly woven together, and the first graphite grounding belt and the second graphite grounding belt are sewn together through the thin lines and the graphite conducting strip.

The spark-plug type flexible grounding module is further optimized as follows: spark thorn subassembly includes rectangular shape metal base, and the long limit in one side of metal base is provided with a plurality of connecting holes side by side, and the long limit side terminal surface in opposite side of metal base is provided with fixed slot and sliding tray side by side, and fixed slot and sliding tray set up along metal base's length direction, and the length of sliding tray is longer than the length of fixed slot, evenly distributed has a plurality of fixed spines in the fixed slot, and fixed spines are fixed to be set up in the fixed slot, be provided with movable spines in the sliding tray, movable spines comprise sliding part and evenly distributed's spine in the sliding part, and the sliding part card is established in the sliding tray, and the sliding tray setting is stretched out to the spines.

The spark-plug type flexible grounding module is further optimized as follows: one side of the side edge of the metal base body, which corresponds to the sliding groove, is provided with a strip-shaped adjusting hole, the side edge of the sliding part of the movable spine, which corresponds to the adjusting hole, is provided with an adjusting handle, and the adjusting handle extends out of the adjusting hole.

The spark-plug type flexible grounding module is further optimized as follows: the distance between two adjacent discharge spikes in the movable spikes is the same as the distance between two adjacent fixed spikes.

The spark-plug type flexible grounding module is further optimized as follows: the length of the fixing groove is the difference between the length of the sliding groove and half of the distance between two adjacent fixing spikes.

A grounding construction method comprises the following steps: and the grounding of the desk transformer or the pole switch is carried out by utilizing the armored grounding down lead, the graphite-based flexible grounding belt, the graphite-based flexible resistance reducing cloth and the spark-stab type flexible grounding module.

A grounding construction method specifically comprises the following steps:

s1: preparation before construction

Before construction, surveying a site according to a design drawing, and determining a construction scheme, wherein the construction scheme comprises the number or the length of an armored grounding down lead, graphite-based flexible resistance reducing cloth, a spark-stab type flexible grounding module and a non-metal clamp;

s2: digging trench

Excavating a main grounding ditch on an original soil layer or a tamped bedding soil layer, and then excavating epitaxial ditches according to the number of the spark plug type flexible grounding modules;

s3: laying of ground material

Firstly, laying a layer of graphite-based flexible resistance reducing cloth in a grounding main trench, then laying a graphite-based flexible grounding belt above the graphite-based flexible resistance reducing cloth, connecting the upper end of an armored grounding down lead with a grounding part of a desk transformer or an on-column switch through a bolt, connecting the lower end of the armored grounding down lead with the graphite-based flexible grounding belt, and finally placing a spark-spine flexible grounding module in each epitaxial trench, wherein a second graphite grounding belt of the spark-spine flexible grounding module is connected with the graphite-based flexible grounding belt through a non-metal clamp;

s4: buried grounding device

Backfilling in the ground ditch, wherein stones, plastics and construction wastes are not clamped in the backfilled soil, the soil is tamped in layers during backfilling, and an anti-settling layer with the height of 100-300 mm is arranged at the upper part.

Advantageous effects

The spark plug type flexible grounding module is provided with a plurality of grounding parts, three spark plug assemblies are respectively arranged on three edges of a graphite conducting strip, each spark plug assembly is provided with a plurality of discharging spikes, the whole spark plug type flexible grounding module is introduced into a whole grounding network through a graphite grounding belt, when equipment is struck by lightning, a spark discharging effect can be formed in the process of discharging lightning current, so that the resistivity of soil around a grounding device is reduced, and the current dissipation is easier;

the spark plug type flexible grounding module is provided with the adjustable movable spikes, the position of the movable spikes can be changed through the adjusting handle according to the actual grounding requirement, and the integral discharge spike number of the spark plug type flexible grounding module is further changed so as to meet various grounding requirements;

and thirdly, the grounding construction method skillfully combines the armored grounding down lead, the graphite-based flexible grounding belt, the graphite-based flexible resistance reducing cloth and the spark-stab type flexible grounding module together to form a set of grounding device, and the grounding device has good grounding effect and is convenient to popularize and apply.

Drawings

Fig. 1 is a schematic structural view of a flexible grounding module of a spark-ignited type in embodiment 1;

fig. 2 is a schematic structural view of a spark plug assembly of the spark plug type flexible grounding module according to embodiment 1;

fig. 3 is a schematic structural view of a flexible grounding module of a spark-gap type (initial state) in embodiment 2;

fig. 4 is a schematic structural view of a flexible grounding module of a spark-gap type (reinforcing state) in embodiment 2;

fig. 5 is a schematic structural view of a metal base of the flexible grounding module of the spark-ignited type in embodiment 2;

fig. 6 is a schematic view of a positional relationship between the graphite-based flexible resistance reducing cloth and the graphite-based flexible grounding strip in example 3;

fig. 7 is a schematic positional relationship diagram of a flexible grounding module of a spark-ignited structure in embodiment 3;

fig. 8 is a schematic structural diagram ii of a spark plug assembly of the spark plug type flexible grounding module in embodiment 1;

the labels in the figure are: 1. the device comprises a first graphite grounding belt, a second graphite grounding belt, a graphite conducting strip, a metal substrate, a discharging spine, a connecting hole, a fixing groove, a sliding groove, a fixing spine, a movable spine, a fixing groove, a sliding spine, a sliding groove.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The technical solution of the present invention is further described below with reference to specific embodiments.