阅读说明：本技术 防雷电电磁脉冲lemp装置 (Lightning protection electromagnetic pulse LEMP device ) 是由 黄中根 陈新玉 杨柳 于 2021-01-08 设计创作，主要内容包括：本发明提供了一种防雷电电磁脉冲LEMP装置。其构造为：接闪器通过法兰固定连接在第一金属管顶端,环氧树脂管通过法兰固定连接在第一金属管底端,环氧树脂管套接在底座中,底座固定连接在基板上,在第一金属管的内部焊接固定有金属片材,金属片材向下伸入至环氧树脂管中,在金属片材上开设有接线孔,电缆的一端连接在接线孔上,电缆的另一端连接至地网,在电缆上套接有第二金属管,第二金属管接地。本发明让接闪器与建筑物完全绝缘,当接闪器接闪雷电时大楼没有瞬态高电压和浪涌电流；同时为雷电流设置专门通道,且该通道与建筑物完全绝缘,并增设屏蔽层,从源头上消除电磁脉冲的干扰,可完全保护建筑物内的所有设备。(The invention provides a lightning-protection electromagnetic pulse LEMP device. The structure is as follows: the arrester passes through flange fixed connection on first tubular metal resonator top, the epoxy pipe passes through flange fixed connection in first tubular metal resonator bottom, the epoxy pipe cup joints in the base, base fixed connection is on the base plate, inside welded fastening at first tubular metal resonator has sheet metal, sheet metal stretches into to the epoxy pipe in downwards, the wiring hole has been seted up on sheet metal, the one end of cable is connected on the wiring hole, the other end of cable is connected to the ground net, the second tubular metal has been cup jointed on the cable, second tubular metal ground connection. The lightning arrester is completely insulated from a building, and the building does not have transient high voltage and surge current when the lightning arrester receives lightning; meanwhile, a special channel is arranged for lightning current, the channel is completely insulated from the building, a shielding layer is additionally arranged, the interference of electromagnetic pulses is eliminated from the source, and all equipment in the building can be completely protected.)

1. Lightning protection electromagnetic pulse LEMP device, characterized by comprising a lightning receptor (1), a first metal tube (2), a base (3), a substrate (4), an epoxy resin tube (5), a metal sheet (6), a wiring hole (7), a cable (8) and a second metal tube (9), wherein the lightning receptor (1) is fixedly connected to the top end of the first metal tube (2) through a flange, the epoxy resin tube (5) is fixedly connected to the bottom end of the first metal tube (2) through a flange, the epoxy resin tube (5) is sleeved in the base (3), the base (3) is fixedly connected to the substrate (4), the metal sheet (6) is welded and fixed inside the first metal tube (2), the metal sheet (6) extends downwards into the epoxy resin tube (5), the wiring hole (7) is formed in the metal sheet (6), one end of the cable (8) is connected to the wiring hole (7), the other end of the cable (8) is connected to the ground net, a second metal pipe (9) is sleeved on the cable (8), and the second metal pipe (9) is grounded.

2. The lightning protection electromagnetic pulse LEMP device according to claim 1, characterized in that said metal sheet (6) is flat copper or flat steel.

3. The device of claim 1, characterized in that the number of wiring holes (7) in the metal sheet (6) is 4.

4. The LEMP device according to claim 1, wherein the epoxy tube (5) has an insulation resistance of not less than 10⁶MΩ。

5. The device of claim 1, characterized in that the withstand voltage of the cable (8) is not less than 10 kV.

6. The lightning protection electromagnetic pulse LEMP device according to claim 1, characterized in that the cable (8) is a polyvinyl chloride flame retardant copper core power cable.

7. The lightning protection electromagnetic pulse LEMP device according to claim 1, characterized in that the second metal tube (9) is grounded once every 25 m.

Technical Field

The invention relates to the technical field of lightning protection, in particular to a lightning protection electromagnetic pulse LEMP device.

Background

Lightning electromagnetic pulse (LEMP), which is an instantaneous electromagnetic field generated during the earth strike and its strong flash current, is a serious hazard to electrical equipment. Specifically, induced overvoltage generated by the lightning electromagnetic pulse on the line can invade equipment along the line (including power supply lines, various signals and other lines) to cause damage; furthermore, electromagnetic radiation generated in space by lightning strike electromagnetic pulses may also enter microelectronic devices, causing damage.

A large number of highly precise control devices are arranged in the center of a communication hub, the working voltage of the devices is generally +/-5V or even lower, the devices have high requirements on the working environment, no interference source exists, otherwise wrong codes can be generated to generate false actions (for example, the collision accident of two high-speed trains in Wenzhou in 7-23 th of 2011 is caused by the control system error caused by lightning stroke through expert analysis). The inventor finds that the digital switch of the telecommunication system is frequently damaged in rare times in daily work, and the main reason of the inventor is caused by the change of the magnetic field generated instantaneously around when lightning current flows through the main steel bar in the upright post of the building after the iron tower on the top of the building is struck by lightning through investigation and detailed analysis by the inventor. In order to prevent the lightning electromagnetic pulse from entering the microelectronic device, the radiation of the lightning electromagnetic pulse to the surroundings must be blocked to achieve a shielding effect.

Disclosure of Invention

The invention aims to overcome the technical defects in the prior art and provides a lightning-protection electromagnetic pulse LEMP device so as to solve the technical problem that electrical equipment is damaged due to electromagnetic pulse generated when a building is struck by lightning.

Another technical problem to be solved by the present invention is how to make a building uncharged when it is struck by lightning.

The invention also aims to solve the technical problem of how to shield the electromagnetic pulse generated by lightning.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

lightning protection electromagnetic pulse LEMP device, including the arrester, first tubular metal resonator, a pedestal, the base plate, the epoxy pipe, sheet metal, the wiring hole, the cable, the second tubular metal resonator, wherein, the arrester passes through flange fixed connection on first tubular metal resonator top, the epoxy pipe passes through flange fixed connection in first tubular metal resonator bottom, the epoxy pipe cup joints in the base, base fixed connection is on the base plate, inside welded fastening at first tubular metal resonator has sheet metal, sheet metal stretches into to the epoxy pipe downwards, the wiring hole has been seted up on sheet metal, the one end of cable is connected on the wiring hole, the other end of cable is connected to the ground net, the second tubular metal resonator has been cup jointed on the cable, second tubular metal ground connection.

Preferably, the metal sheet is flat copper or flat steel.

Preferably, the number of wiring holes in the metal sheet is 4.

Preferably, the epoxy resin tube has an insulation resistance of not less than 10⁶MΩ。

Preferably, the withstand voltage of the cable is not less than 10 kV.

Preferably, the cable is a polyvinyl chloride flame-retardant copper-core power cable.

Preferably, the second metal tube is grounded once every 25 m.

The invention is designed into a four-section structure from top to bottom:

a first section: the lightning arrester (needle) is pointed at the top end, adopts phi 16-22 mm stainless steel round steel to be welded with a phi 40-50 mm stainless steel pipe, the length of each stainless steel round steel pipe is 30-50 cm, and the bottom end of each lightning arrester round steel pipe is welded on a flange plate.

A second section: the stainless steel pipe or the galvanized steel pipe with the inner diameter phi of 75mm is about 1-1.2 m long. The upper end and the lower end are welded on the flange. A50 mm by 5mm flat copper is welded in the pipe, the length of the flat copper extending out of the flange opening is about 20cm, and 4 round holes (used for installing 4 lightning current special down leads) with the diameter of 10mm are machined in the extending part.

Third stage: the thickness of the epoxy resin tube is 10mm (the required insulation resistance is more than or equal to 10)⁶M omega), the length is 1.2M, and the inner diameter is 110-120 mm. The upper end is processed into a flange disc which is convenient to be connected with the second section.

And a fourth section: the fixed base (metal base) is mainly made of galvanized steel.

On the basis of the above construction, 4 pieces of 95mm with withstand voltage not less than 10kV are adopted²And a down lead of the special power cable with multiple strands of copper cores is connected to the flat copper of the second section (4 holes are reserved), is led out from the inside of the epoxy resin pipe of the third section, is sleeved with a layer of metal pipe in the whole process from a leading-out point and is connected to the ground grid. The metal tube should be grounded once every 25 m.

The invention is based on the principle of point discharge, the lightning receiving point is arranged at a safe distance from a machine room of microelectronic equipment, a special current down lead for lightning is installed, and the down lead is laid in a shielding device to be connected to the ground, so that the lightning flows to the ground to be discharged. The lightning receptor and the down conductor are isolated from the fixing device, the down conductor is shielded in the whole process, and no electromagnetic pulse is generated around the down conductor in the process. The invention makes the building uncharged when being struck by lightning and shields the electromagnetic pulse generated by the lightning.

Compared with the common lightning rod, the invention realizes insulation and shielding, and is completely independent in structure; on one hand, the lightning receptor is completely insulated from the building through the insulating resin pipe, and the building has no transient high voltage and surge current when lightning is received; on the other hand, the invention leads lightning current to flow into the ground along a preset channel, and a shielding layer is added to realize complete shielding, eliminate the interference of electromagnetic pulse from the source and completely protect all equipment in the building.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a schematic view of the structure of the lightning receptor according to the present invention;

FIG. 3 is a schematic view of the structure of a first metal tube and a metal sheet according to the present invention;

FIG. 4 is a front view of an epoxy tube of the present invention;

FIG. 5 is a top view of an epoxy tube of the present invention;

FIG. 6 is a front view of the base of the present invention;

FIG. 7 is a top view of the base of the present invention;

in the figure:

1. lightning receptor 2, first metal tube 3, base 4 and substrate

5. Epoxy resin tube 6, metal sheet 7, wiring hole 8 and cable

9. A second metal tube.

Detailed Description

Hereinafter, specific embodiments of the present invention will be described in detail. Well-known structures or functions may not be described in detail in the following embodiments in order to avoid unnecessarily obscuring the details. Approximating language, as used herein in the following examples, may be applied to identify quantitative representations that could permissibly vary in number without resulting in a change in the basic function. Unless defined otherwise, technical and scientific terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Lightning protection electromagnetic pulse LEMP device, as shown in fig. 1, including arrester 1, first tubular metal resonator 2, base 3, base plate 4, epoxy pipe 5, sheet metal 6, wiring hole 7, cable 8, second tubular metal resonator 9, wherein, arrester 1 passes through flange fixed connection at first tubular metal resonator 2 top, epoxy pipe 5 passes through flange fixed connection at first tubular metal resonator 2 bottom, epoxy pipe 5 cup joints in base 3, base 3 fixed connection is on base plate 4, inside welded fastening has sheet metal 6 at first tubular metal resonator 2, sheet metal 6 stretches into to epoxy pipe 5 downwards, wiring hole 7 has been seted up on sheet metal 6, the one end of cable 8 is connected on wiring hole 7, the other end of cable 8 is connected to the ground net, second tubular metal resonator 9 has been cup jointed on cable 8, second tubular metal resonator 9 ground connection.

The structure of the lightning receptor 1 is shown in fig. 2, the upper part of the lightning receptor is hot-dip galvanized round steel with the diameter of 16-22 mm, the lower part of the lightning receptor is a 32mm steel pipe with a flange (the diameter of the flange is 150mm) welded at the bottom end, and the two parts are welded into a whole.

The first metal pipe 2 and the metal sheet 6 are structured as shown in FIG. 3, the first metal pipe 2 is a steel pipe with an inner diameter of 100mm, the wall thickness is 6-8 mm, the pipe length is 1-1.2 m, and flanges are welded on the upper and lower parts of the pipe; the metal sheet 6 is a flat steel of 60 × 6mm or 50 × 5mm, and is welded to the first metal pipe 2. The length of the metal sheet 6 is 300 to 350mm, and the length of the part of the metal sheet extending below the first metal pipe 2 is 200 mm. The diameter of the wiring hole 7 is 10 mm.

The structure of the epoxy resin tube 5 is shown in fig. 4 and 5, and the structure of the base 3 is shown in fig. 6 and 7. Epoxy pipe 5 and base 3 are overlapped together, and epoxy pipe 5 is used for insulating, is the core component of this lightning protection device, and its centre is hollow, internal diameter 150mm, and 12mm of pipe wall thickness, pipe external diameter 170mm, pipe length 900 ~ 1000mm, flange external diameter 250 ~ 280 mm. The inner diameter of the base 3 is more than 170mm larger than the outer diameter of the epoxy resin pipe 5, so that the epoxy resin pipe 5 can be freely sleeved in the base 3, and the wall thickness of the base 3 is 8 mm.

The base plate 4 is a platform for fixing the base 3, and may be a platform on an iron tower, for example, and a steel plate with a thickness of 10mm is generally used.

The cable 8 is a special down lead for lightning current, the withstand voltage value is required to be more than or equal to 15kV, and a polyvinyl chloride flame-retardant copper core power cable is generally adopted. The specification is ZR-YJV multiplied by 10kV multiplied by 1 multiplied by 95mm²4 in total. The upper end is connected to the metal sheet 6 through the wire baits, and every two second metal tubes 9 of the group at the lower end are directly connected with the ground net.

The second metal pipe 9 is a galvanized steel pipe or a stainless steel pipe, and the steel pipe is required to be connected with a grounding device.

The embodiments of the present invention have been described in detail, but the description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. Any modification, equivalent replacement, and improvement made within the scope of the application of the present invention should be included in the protection scope of the present invention.