WO2008009203A1 - Douille résistante anti-foudre et son procédé de fabrication - Google Patents

Douille résistante anti-foudre et son procédé de fabrication Download PDF

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Publication number
WO2008009203A1
WO2008009203A1 PCT/CN2007/002021 CN2007002021W WO2008009203A1 WO 2008009203 A1 WO2008009203 A1 WO 2008009203A1 CN 2007002021 W CN2007002021 W CN 2007002021W WO 2008009203 A1 WO2008009203 A1 WO 2008009203A1
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WO
WIPO (PCT)
Prior art keywords
metal layer
lightning protection
insulating layer
protection sleeve
absorbing metal
Prior art date
Application number
PCT/CN2007/002021
Other languages
English (en)
French (fr)
Inventor
Lianjun Li
Original Assignee
Lianjun Li
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lianjun Li filed Critical Lianjun Li
Priority to CA2644077A priority Critical patent/CA2644077C/en
Publication of WO2008009203A1 publication Critical patent/WO2008009203A1/zh
Priority to US12/231,424 priority patent/US7943869B2/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
    • H02G13/40—Connection to earth
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings

Definitions

  • the invention relates to the technical field of lightning protection devices, in particular to a lightning protection sleeve and a production process thereof. Background technique
  • the lower lead wire and the lead bushing used are not designed to take into account the adverse effects of electromagnetic induction generated during lightning strikes on the electronic equipment in the building.
  • the lightning current passes through the lower lead wire, it is easy to be instantaneously generated.
  • the strong electromagnetic induction causes damage to the electronic equipment in the building.
  • Lightning and lightning strikes on the ground by Thundercloud are due to the fact that the thundercloud with a large number of electrostatic nuclei forms a very high potential difference with respect to the ground, resulting in a strong discharge effect.
  • lightning Because lightning has the characteristics of instantaneous high voltage and large current, after a powerful lightning strike, it will generate electrostatic field, electromagnetic field, electromagnetic radiation, lightning wave intrusion, ground potential counterattack, etc., collectively called lightning electromagnetic pulse, which seriously interferes with radio communication and
  • the normal operation of various electronic monitoring equipments causes damage to many weak electrical equipment within a certain range.
  • Various sensitive weak electrical equipment such as cameras, smoke detecting alarms, and temperature sensors are most vulnerable to lightning damage. Summary of the invention
  • the object of the present invention is to provide a lightning protection sleeve and a production process thereof, so as to prevent the induced electromagnetic field generated when a lightning current passes through the lower lead wire, and the related sensitive weak electrical equipment in the building Prepare for damage.
  • a lightning protection sleeve has a tubular body of a circular tube, the sleeve body is composed of an inner insulating layer, an intermediate electromagnetic absorbing metal layer and an outer insulating layer, wherein the inner insulating layer, the intermediate electromagnetic absorbing metal layer and the outer insulating layer
  • the layer is a one-piece structure, and the intermediate electromagnetic absorbing metal layer is disposed in the middle of the inner and outer insulating layers, and the axial electromagnetic absorbing metal layers are not in contact with each other on the axial sides, and the whole is formed into a circular tube having a radial opening.
  • the inner insulating layer at one end of the sleeve protrudes and forms an external thread with the intermediate electromagnetic absorbing metal layer
  • the outer insulating layer at the other end of the sleeve protrudes and forms an internal thread with the intermediate electromagnetic absorbing metal layer; Matches the external thread.
  • the lightning protection sleeve When in use, the lightning protection sleeve is placed in the lower lead of the lightning protection device, and the intermediate electromagnetic absorption metal layer of the lower lead and the lightning protection sleeve is separately connected to the ground through the wire buried deep in the earth, when a strong lightning current passes through the lower lead wire. There is a strong induction electromagnetic around it. Due to the role of the electromagnetic absorption metal layer in the middle of the lightning protection sleeve, most of the induced electromagnetic radiation will generate electromagnetic induction in the middle electromagnetic absorption metal layer to convert the induced current and be absorbed. The electromagnetic absorption metal layer in the middle of the lightning protection sleeve will be discharged in the form of induced current, thereby protecting various weak electrical equipment in the building.
  • the intermediate electromagnetic absorption metal layer is first made of a conductive strip-shaped metal sheet, and the axial electromagnetic absorption metal layers are not connected to each other at the axial sides, and the whole is a circular tube having a radial opening.
  • the mold comprises an inner core and an outer mold, and the inner core is stepped, and one step is outside. Threaded, just like the internal thread at one end of the intermediate electromagnetic absorbing layer; the inner cavity of the outer mold is also stepped, and is internally threaded at one step, just in line with the external thread of the other end of the intermediate electromagnetic absorbing metal layer.
  • the intermediate electromagnetic absorption metal layer is placed in a cavity formed by the synthesis of the inner core and the outer mold, and the screw is screwed and fixed; then the insulating material in the molten state is poured into the cavity by the device; the pressure is maintained and cooled. Forming, mold opening and taking out the formed lightning protection sleeve.
  • FIG. 1 is a schematic structural view of a first embodiment of a lightning protection sleeve of the present invention
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
  • FIG. 3 is a schematic structural view of a second embodiment of the lightning protection sleeve of the present invention.
  • Figure 4 is a cross-sectional view taken along line B-B of Figure 3;
  • FIG. 5 is a schematic structural view of a lightning protection sleeve of the present invention applied to a lightning protection device;
  • FIG. 6 is a schematic view showing the working principle of the lightning protection sleeve of the present invention.
  • Figure 7. is a cross-sectional view of the D-D of Figure 8, is a schematic view of the mold synthetic casting lightning protection sleeve;
  • Figure 8. is a cross-sectional view taken along line C-C of Figure 7;
  • Figure 9. is a schematic view of the mold decomposition. detailed description
  • the intermediate electromagnetic absorbing metal layer 1 is disposed between the inner insulating layer 3 and the outer insulating layer 2, and the intermediate electromagnetic absorbing metal layer 1 is axially both sides.
  • the inner insulating layer 3 at one end of the sleeve protrudes and constitutes the external thread 11 with the intermediate electromagnetic absorbing metal layer 1, and the outer insulating layer 2 at the other end of the sleeve protrudes And forming an internal thread 12 with the intermediate electromagnetic absorbing metal layer 1; the internal thread 12 and the external thread 11 are matched with each other.
  • the intermediate electromagnetic absorbing metal layer 1 is integrally formed into a thread shape.
  • the length is cut as needed, and then the corresponding inner insulating layer 3 is removed at one end of the sleeve, and the internal thread 12 is in the sleeve.
  • the other end of the strip is removed from the corresponding outer insulating layer 2 and is externally threaded 11.
  • the product of the invention When the product of the invention is used, it can be synchronized with the building infrastructure.
  • the lightning protection sleeve and the lower bow I line of the invention are embedded in the concrete interior of the building body, because the lightning protection sleeve has a functional structure connected end to end. Therefore, it is not subject to the height of the building.
  • the connection mode is as follows: The internal thread 12 of one lightning protection sleeve is screwed onto the external thread 11 of the other lightning protection sleeve, so that the electromagnetic absorption metal layer in the middle of the lightning protection sleeve is non-closed and the mouth is annularly aligned outward.
  • the lightning protection sleeve is inserted into the lower lead 4 of the lightning protection device, and the intermediate electromagnetic absorption metal layer 1 of the lower lead 4 and the lightning protection sleeve is separately connected to the ground through the wire 5 buried deep in the earth.
  • the electromagnetic absorbing layer in the middle of the lightning protection sleeve is in a non-closed open loop, a small part of the induced electromagnetic E leaks out, and the inductive electric current of the intermediate electromagnetic absorbing metal layer 1 also releases a small amount of secondary Inductive electromagnetic radiation, but these leakage radiation is already very small, does not have a great impact on indoor electrical equipment, thus achieving the purpose of protecting electrical and electronic equipment in the room.
  • the lightning protection sleeve can also be placed outdoors.
  • the intermediate electromagnetic absorption layer 1 is first prepared, and the intermediate electromagnetic absorption layer is made of a conductive strip-shaped metal sheet, one end is pressed into an external thread 11, and the other end is pressed into an internal thread 12, and coated.
  • the mold comprises an inner core 9 and an outer mold 8.
  • the inner core 9 is stepped, and a step is externally threaded 91, which is exactly opposite to the internal thread 12 at one end of the intermediate electromagnetic absorbing layer 1.
  • the inner cavity of the outer mold 8 is stepped, and has an internal thread 81 at one step thereof, which is just screwed with the external thread 11 at the other end of the intermediate electromagnetic absorbing layer 1; the intermediate electromagnetic absorbing layer 1 is placed in the inner core 9
  • the threads are screwed and set.
  • the insulating material in the molten state is poured into the mold cavity to form the outer insulating layer 2 and the inner insulating layer 3.
  • the outer mold 8 and the inner core 9 are opened, and the outer mold 8 and the inner core 9 are opened and formed. Lightning protection sleeve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Elimination Of Static Electricity (AREA)
  • Insulating Bodies (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Description

一种防雷套管及其生产工艺 技术领域
本发明涉及防雷装置技术领域，具体是一种防雷套管及其生产工 艺。 背景技术
在防雷技术中，使用的下引线和引线套管在设计时没有考虑到雷 击时产生的电磁感应对建筑物内的电子设备造成的不良影响，当雷电 流通过下引线时，容易因瞬时产生的强电磁感应造成建筑物内电子设 备的损坏。雷雨云对地产生的闪电和雷击， 是由于带有大量静电核的 雷雨云相对地面形成一个很高的电位差，从而产生强烈放电效应。 由 于雷电具有瞬间性高电压、大电流的特点， 在强大的雷电闪击后， 将 产生静电场、 电磁场、 电磁辐射， 以及雷电波侵入、 地电位反击等， 统称雷电电磁脉冲，严重干扰无线电通讯和各种电子监控设备的正常 工作， 在一定范围内造成许多弱电设备损坏， 如摄像头、烟雾探测警 报器，温度传感器等各种敏感性弱电设备在遇到雷电时最容易遭到破 坏。 发明内容
本发明的目的是提供一种防雷套管及其生产工艺，以防止雷电流 通过下引线时，所产生的感应电磁场对建筑物内有关敏感性弱电器设 备造成损害。
为了实现上述目的， 本发明采用下述的技术方案：
一种防雷套管，具有一圆管形的套管本体，套管本体由内绝缘层、 中间电磁吸收金属层和外绝缘层构成， 其中， 内绝缘层、 中间电磁吸 收金属层和外绝缘层为一体式结构， 中间电磁吸收金属层设在内、外 绝缘层的中间，中间电磁吸收金属层轴向两侧边不相接且使其整体呈 具有径向开口的圆管状。
更优的，套管一端的内绝缘层凸出并与中间电磁吸收金属层形成 外螺纹，套管另一端的外绝缘层凸出并与中间电磁吸收金属层形成内 螺纹； 所述的内螺紋与外螺纹相匹配。
采用上述技术方案后， 可以将若干防雷套管连接在一起。
使用时，将防雷套管套入避雷设备的下引线，下引线和防雷套管 的中间电磁吸收金属层分别通过深埋于大地的导线单独连接大地，当 强大的雷电流通过下引线时，在其周围会产生很强的感应电磁， 由于 防雷套管的中间电磁吸收金属层的作用，大部分感应电磁辐射会在中 间电磁吸收金属层产生电磁感应而转化感应电流从而被吸收，并将以 感应电流的形式从防雷套管的中间电磁吸收金属层泄放出去，从而起 到保护建筑物内的各种弱电设备。由于防雷套管中间电磁吸收层呈非 闭合的开口环状，会有很少部分的感应电磁泄漏出去，此外中间电磁 吸收金属层的感应电流也会释放出微量的二次感应电磁辐射，但，这 些泄漏性的辐射已经很小了， 并不会对室内电气设备产生很大的影 响， 从而达到保护室内的电子电器设备之目的。 制造这种防雷套管，先用导电长条形金属簿片做好中间电磁吸收 金属层， 中间电磁吸收金属层轴向两侧边不相接且使其整体呈具有 径向开口的圆管状， 一端压成外螺纹， 另一端压成内螺紋，并镀膜； 同时根据相关规格做好相应模具，模具包含有内模芯和外模组成，内 模芯呈阶梯状， 其一台阶处呈外螺纹状,正好与中间电磁吸收层一端 的内螺纹相旋合;外模的内腔也呈阶梯状，在其一台阶处呈内螺紋状， 正好与中间电磁吸收金属层另一端的外螺紋相旋合；中间电磁吸收金 属层置于内模芯与外模合成后形成的模腔内， 螺紋旋合并定好位;然 后用设备浇注熔融状态下的绝缘材料到模腔内；适当保压、冷却成形、 开模取出成形了的防雷套管。 附图说明
图 1是本发明防雷套管实施例一的结构示意图；
图 2是图 1的 A- A剖视图；
图 3是本发明防雷套管实施例二的结构示意图；
图 4是图 3的 B-B剖视图；
图 5是本发明防雷套管应用于防雷装置中的结构示意图； 图 6是本发明防雷套管工作过程原理示意图；
图 7.是图 8的 D-D的剖视图， 是模具合成浇注防雷套管示意图； 图 8.是图 7的 C-C剖视图；
图 9.是模具分解示意图。 具体实施方式
下面结合附图对本发明作详细的说明，如图 1到图 9所示， 中间 电磁吸收金属层 1设在内绝缘层 3与外绝缘层 2中间，中间电磁吸收 金属层 1轴向两侧边不相接且使其整体呈具有径向开口的圆管状；套 管一端的内绝缘层 3凸出并与中间电磁吸收金属层 1组成外螺紋 11， 套管另一端的外绝缘层 2凸出并与中间电磁吸收金属层 1组成内螺纹 12； 所述的内螺纹 12与外螺紋 11相互匹配。
图 4中则是将中间电磁吸收金属层 1整体都做成螺紋状，使用时， 根据需要截取长短， 然后在套管的一端部除去相应的内绝缘层 3， 呈 内螺纹 12， 在套管的另一端除去相应的外绝缘层 2， 呈外螺紋 11。
本发明产品使用时，可以与建筑物基建同步，在基建时先预埋本 发明的防雷套管及下弓 I线于建筑主体的混凝土内部，因防雷套管具有 首尾相连接的功能结构，故不会受到建筑物高度的限制。连接方式为： 一根防雷套管的内螺纹 12旋接到另一防雷套管的外螺纹 11上，使防 雷套管中间电磁吸收金属层呈非闭合的幵口环状对齐朝外，将防雷套 管套入避雷设备的下引线 4， 下引线 4和防雷套管的中间电磁吸收金 属层 1分别通过深埋于大地的导线 5单独接大地。
如图 6所示， 当强大的雷电流 I通过下引线 4时，强大的雷电流 I通过下引线 4和深埋于大地的导线 5流入大地； 与此同时， 强大的 雷电流 I通过下引线 4时由于瞬间电流突然变大，在其周围会产生很 强的感应磁场 E， 在防雷套管的中间电磁吸收金属层 1上会吸收大部 分感应磁场 E并转为感应电流 Γ 经中间电磁吸收金属层泄放出去， 从而起到保护建筑物内的各种敏感性的弱电设备。由于防雷套管中间 电磁吸收层呈非闭合的开口环状，会有很少部分的感应电磁 E泄漏出 去， 此外中间电磁吸收金属层 1的感应电^ I' 也会释放出微量的二 次感应电磁辐射，但这些泄漏性的辐射已经很小了，并不会对室内电 气设备产生很大的影响， 从而达到保护室内的电子电器设备之目的。
该防雷套管也可设置于室外。
制造这种防雷套管， 要先做好中间电磁吸收层 1，用导电长条形 金属簿片做好中间电磁吸收层， 一端压成外螺纹 11，另一端压成内螺 纹 12，并镀膜； 再做好模具， 模具包含有内模芯 9和外模 8组成， 内 模芯 9呈阶梯状， 其一台阶处呈外螺紋 91，正好与中间电磁吸收层 1 一端的内螺纹 12相旋合； 外模 8的内腔呈阶梯状， 在其一台阶处呈 内螺纹 81， 正好与中间电磁吸收层 1另一端的外螺纹 11相旋合； 将 中间电磁吸收层 1置于内模芯 9与外模 8合成后形成的模腔内，螺纹 旋合并定好位。然后放入设备中浇注熔融状态下的绝缘材料到模腔内， 形成外绝缘层 2和内绝缘层 3， 保压、 冷却成形后， 打开外模 8和内 模芯 9， 即可取出成形了的防雷套管。

Claims

权 利 要 求
1.一种防雷套管，具有一圆管形的套管本体，其特征在于套管本 体由内绝缘层、 中间电磁吸收金属层和外绝缘层构成， 其中， 内绝缘 层、中间电磁吸收金属层和外绝缘层为一体式结构， 中间电磁吸收金 属层设在内、外绝缘层中间， 中间电磁吸收金属层轴向两侧边不相接 且使其整体呈具有径向开口的圆管状。
2.根据权利要求 1所述的防雷套管，其特征在于所述的中间电磁 吸收金属层的圆弧度大于 180度。
3.根据权利要求 1或 2所述的防雷套管，其特征在于套管本体一 端的内绝缘层凸出并与中间电磁吸收金属层形成外螺紋，套管另一端 的外绝缘层凸出并与中间电磁吸收金属层形成与套管本体外螺纹相 匹配的内螺纹。
4.一种防雷套管生产工艺，是先做好径向开口的圆管状中间电磁 吸收金属层， 并镀膜， 然后放在模具上定好位， 再向模具内浇注熔融 状态下的绝缘材料， 形成内绝缘层和外绝缘层， 经保压、 冷却成形、 开模取出。
5. 根据权利要求 4所述的防雷套管生产工艺， 其特征在于径向 开口的圆管状中间电磁吸收金属层是取长条形的金属薄片，两头压制 成螺纹，然后放入模具上折弯成弧度大于 180度的弧形状。
6. 根据权利要求 4所述的防雷套管生产工艺， 其特征在于： 外 模设有内螺纹与径向开口.的圆管状中间电磁吸收金属层上的外螺纹 相配合，内模芯设有外螺纹与径向开口的圆管状中间电磁吸收金属层 上的内螺紋相配合。
PCT/CN2007/002021 2006-07-10 2007-06-28 Douille résistante anti-foudre et son procédé de fabrication WO2008009203A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA2644077A CA2644077C (en) 2006-07-10 2007-06-28 A lightning resistive bush and manufacture procedure thereof
US12/231,424 US7943869B2 (en) 2006-07-10 2008-08-18 Lightning resistive and manufacture procedure

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CN200610036410.7 2006-07-10
CN200610036410.7A CN100492792C (zh) 2006-07-10 2006-07-10 一种防雷套管及其生产工艺

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CN112659497B (zh) * 2020-12-02 2023-10-24 宁波兴晟石油管件制造有限公司 一种螺母螺纹检验机的自动上料装置

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