A lightning protection grounding structure for a weak current box

Abstract

A lightning protection grounding structure for a weak current box relates to the field of safety protection of weak current boxes, and is used to reduce the possibility that the metal shell of the weak current box is electrified when the weak current box guides lightning. The lightning protection grounding structure for the weak current box includes a metal shell, a lightning rod, a lightning induction line, a grounding column, an embedded part, and a conductive column; the lightning rod is arranged on the metal shell; the lightning induction line is arranged on the metal shell, and the lightning induction line is electrically connected to the lightning rod; the grounding column is arranged outside the metal shell, the grounding column is electrically connected to the lightning induction line, the grounding column and the lightning induction line are detachably connected, the embedded part is arranged underground, a mounting hole is formed on the embedded part, the grounding column passes through the mounting hole, and the grounding column is fixedly connected to the embedded part; the conductive column is arranged underground, one end of the conductive column is fixedly connected to the underground part of the grounding column, the conductive column is electrically connected to the grounding column, and the other end of the conductive column extends downward. The present application is used to improve the conductive effect of the grounding column of the weak current box, improve the conductive rate, and reduce the danger of the weak current box guiding lightning.

Description

Technical Field

[0001] The present application relates to the field of safety protection of weak current boxes, and in particular to a lightning protection grounding structure for weak current boxes. Background Art

[0002] The weak-current box is also called a smart home wiring box, multimedia box, and distribution box. The weak-current box is a centralized box for weaker voltage lines. It is also a control box for some assembly lines or large equipment. The weak-current box is mainly used for wiring and weak-current control.

[0003] Some weak current boxes are installed indoors, and some are installed outdoors. The weak current boxes on the outdoor walls are easy to attract lightning due to their metal shells and internal electric and magnetic fields. For this reason, some lightning protection structures have appeared, which install lightning rods and grounding lines on the weak current boxes to improve the safety of the weak current boxes.

[0004] The weak current box originally had a grounding wire in the circuit, and the grounding wire was connected to the shell and had the effect of guiding lightning. Therefore, the grounding line on the weak current box only had a conductive copper rod and an embedded part buried underground. The embedded part was used to keep the conductive copper rod stable. This structure has a good conductive effect, but the contact area between the conductive copper rod and the ground is small, and the ground may absorb lightning slowly, resulting in backflow and causing the weak current box shell to be charged. Summary of the invention

[0005] The present application provides a lightning protection grounding structure for a weak current box, which is used to reduce the possibility that the metal casing of the weak current box becomes charged when the weak current box guides lightning.

[0006] The present application provides a lightning protection and grounding structure for a weak current box, comprising a metal shell, a lightning rod, a lightning induction line, a grounding column, an embedded part and a conductive column; the lightning rod is arranged on the metal shell; the lightning induction line is arranged on the metal shell, and the lightning induction line is electrically connected to the lightning rod; the grounding column is arranged outside the metal shell, the grounding column is electrically connected to the lightning induction line, the grounding column and the lightning induction line are detachably connected, and a part of the grounding column extends underground; the embedded part is arranged underground, an installation hole is formed on the embedded part, the grounding column passes through the installation hole, and the grounding column is fixedly connected to the embedded part; the conductive column is arranged underground, one end of the conductive column is fixedly connected to the part of the grounding column located underground, the conductive column is electrically connected to the grounding column, the other end of the conductive column extends downward, and the other end of the conductive column extends in a direction away from the grounding column.

[0007] The lightning rod, lightning conductor line and grounding pole in the present application can guide lightning underground, and the embedded parts can keep the grounding pole stable; the conductive pole is electrically connected to the grounding pole, and the conductive pole is arranged underground, which can increase the contact area between the grounding pole and the soil and expand the space for effective conduction of the grounding pole underground, thereby improving the conduction efficiency, reducing the possibility of lightning backflow due to slow ground absorption after lightning enters the underground, and improving the safety of the weak current box.

[0008] In some embodiments of the present application, a plurality of conductive posts are provided, and the plurality of conductive posts are spaced around the grounding post. The plurality of conductive posts can further increase the contact area between the grounding post and the conductive post as a whole and the soil, thereby increasing the lightning conduction speed.

[0009] In some embodiments of the present application, multiple conductive posts are evenly distributed along a cross section perpendicular to the axis of the grounding post. The evenly distributed grounding posts can make the soil have similar electrical potential in a short time, avoiding poor lightning conduction effect on the conductive posts in the area due to excessively high local potential.

[0010] In some embodiments of the present application, the lightning protection grounding structure of the weak current box further includes a connector, the connector is conductive, the connector is arranged between the grounding column and the conductive column, the connector includes an inner ring, a connector and an outer ring, the inner ring is sleeved on the underground portion of the grounding column, the outer ring is arranged outside the inner ring, the connector is arranged between the outer ring and the inner ring, the connector is fixedly connected to the inner ring and the outer ring, and the conductive column is fixedly connected to the outer ring. The connector can facilitate the stable connection between the conductive column and the grounding column.

[0011] In some embodiments of the present application, the inner ring and the outer ring are coaxially distributed. The coaxial distribution of the inner ring and the outer ring can make the distribution of the grounding column and the conductive paper more uniform, and the charges on the unit volume of soil are closer when the soil is conductive, avoiding the generation of local current backflow.

[0012] In some embodiments of the present application, the connecting body is an arc-shaped rod or a straight rod. Both the straight rod and the arc-shaped rod can meet the requirement of fixed connection between the inner ring and the outer ring.

[0013] In some embodiments of the present application, the weak current box lightning protection grounding structure further includes a protective layer, which is arranged outside the grounding column, fixedly connected to the grounding column, and made of an insulating material. The protective layer can protect the grounding column from scratches, and can also prevent surrounding flammable materials from catching fire or people from getting electric shocks when conducting electricity.

[0014] In some embodiments of the present application, the weak current box lightning protection grounding structure further includes a clamp, which is arranged outside the protective layer and is used to fix the grounding column to the preset wall surface. The clamp is used to stabilize the installation of the part of the grounding column located on the ground.

[0015] In some embodiments of the present application, a wiring terminal is provided at the upper end of the grounding column, and the lightning induction line is detachably connected to the wiring terminal, and the lightning induction line is electrically connected to the wiring terminal. The wiring terminal can make the lightning induction line and the grounding column detachable, which is helpful for the installation and maintenance of the weak current box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the technical solution of the utility model and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the utility model and do not constitute a limitation on the technical solution of the utility model.

[0017] Figure 1 A schematic diagram of a lightning protection grounding structure for a weak current box provided in an embodiment of the present application.

[0018] Figure numerals: 1-metal casing; 2-lightning rod; 3-lightning line; 4-grounding column; 41-connecting terminal; 42-protective layer; 43-hoop; 5-embedded part; 6-conductive column; 7-connector; 71-inner ring; 72-connector; 73-outer ring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, when describing a pipeline, the "connected" and "connection" used in this application have the meaning of conduction. The specific meaning needs to be understood in conjunction with the context.

[0023] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0024] The weak-current box is also called a smart home wiring box, multimedia box, and distribution box. The weak-current box is a centralized box for weaker voltage lines. It is also a control box for some assembly lines or large equipment. The weak-current box is mainly used for wiring and weak-current control.

[0025] Some weak current boxes are installed indoors, and some are installed outdoors. The weak current boxes on the outdoor walls are easy to attract lightning due to their metal shells and internal electric and magnetic fields. For this reason, some lightning protection structures have appeared, which install lightning rods and grounding lines on the weak current boxes to improve the safety of the weak current boxes.

[0026] The weak current box originally had a grounding wire in the circuit, and the grounding wire was connected to the shell and had the effect of guiding lightning. Therefore, the grounding line on the weak current box only had a conductive copper rod and an embedded part buried underground. The embedded part was used to keep the conductive copper rod stable. This structure has a good conductive effect, but the contact area between the conductive copper rod and the ground is small, and the ground may absorb lightning slowly, resulting in backflow and causing the weak current box shell to be charged.

[0027] To do this, please refer to Figure 1 The present application provides a lightning protection and grounding structure for a weak current box, including a metal shell 1, a lightning rod 2, a lightning line 3, a grounding column 4, an embedded part 5 and a conductive column 6.

[0028] Please refer to Figure 1 The lightning rod 2 is arranged on the metal shell 1; the lightning line 3 is arranged on the metal shell 1, and the lightning line 3 is electrically connected to the lightning rod 2. The lightning rod 2 can be a conventional lightning rod 2, and the lightning rod 2 and the metal shell 1 can be directly connected or directly or indirectly connected.

[0029] Please refer to Figure 1 The metal shell 1 may be cast iron or other metal materials, such as stainless steel. The lightning induction line 3 may be a metal frame, such as a copper frame or an iron frame, and the lightning induction line 3 and the metal shell 1 may be fixedly connected, such as by bolt connection or clamping, or by other connection methods.

[0030] Please refer to Figure 1The grounding post 4 is arranged outside the metal housing 1, the grounding post 4 is electrically connected to the lightning induction line 3, the grounding post 4 is detachably connected to the lightning induction line 3, and a part of the grounding post 4 extends underground. The grounding post 4 can be a metal post, and its material can be copper. The metal post can be a cylinder of equal diameter or a stepped shaft.

[0031] Please refer to Figure 1 The embedded part 5 is arranged underground, and a mounting hole is formed on the embedded part 5. The grounding column 4 passes through the mounting hole and the grounding column 4 is fixedly connected to the embedded part 5. The embedded part 5 can be made of metal or non-metal, for example, a cement product.

[0032] The conductive column 6 is arranged underground, one end of the conductive column 6 is fixedly connected to the underground portion of the grounding column 4, the conductive column 6 is electrically connected to the grounding column 4, and the other end of the conductive column 6 extends downward and the other end of the conductive column 6 extends in a direction away from the grounding column 4. The conductive column 6 can be made of metal, and its material can also be copper, or iron, or silver.

[0033] Please refer to Figure 1 The conductive column 6 can be a cylinder with a constant diameter, or a deformed cylinder or a prism. The conductive column 6 and the grounding column 4 can be connected by snapping, welding, integral molding or bolts.

[0034] The lightning rod 2, lightning conductor line 3 and grounding column 4 in the present application can guide lightning to the underground, and the embedded part 5 can keep the grounding column 4 stable; the conductive column 6 is electrically connected to the grounding column 4, and the conductive column 6 is arranged underground, which can increase the contact area between the grounding column 4 and the soil and expand the space for effective conduction of the grounding column 4 underground, thereby improving the conduction efficiency, reducing the possibility of lightning backflow due to slow ground absorption after lightning enters the underground, and improving the safety of the weak current box.

[0035] Please refer to Figure 1 In some examples, the conductive column 6 is provided in plurality, and the plurality of conductive columns 6 are spaced around the grounding column 4. The plurality of conductive columns 6 can further increase the contact area between the grounding column 4 and the conductive column 6 as a whole and the soil, thereby increasing the lightning conduction speed.

[0036] In some examples, the number of the conductive pillars 6 may be three, four, or six.

[0037] Please refer to Figure 1 In some examples, multiple conductive posts 6 are evenly distributed along a cross section perpendicular to the axis of the grounding post 4. The evenly distributed grounding posts 4 can make the soil have similar short-term potential, avoiding poor lightning conduction effect on the conductive posts 6 in the area due to excessively high local potential.

[0038] In some examples, uniform distribution may be understood as the angles between two conductive pillars 6 being equal, or the corresponding intervals between two conductive pillars 6 being equal.

[0039] Please refer to Figure 1 In some examples, the lightning protection grounding structure of the weak current box further includes a connector 7, which is conductive, disposed between the grounding column 4 and the conductive column 6, and includes an inner ring 71, a connector 72, and an outer ring 73. The inner ring 71 is sleeved on the underground portion of the grounding column 4, the outer ring 73 is disposed outside the inner ring 71, the connector 72 is disposed between the outer ring 73 and the inner ring 71, the connector 72 is fixedly connected to the inner ring 71 and the outer ring 73, and the conductive column 6 is fixedly connected to the outer ring 73. The connector 7 can facilitate the stable connection between the conductive column 6 and the grounding column 4.

[0040] In some examples, the inner ring 71, the connector 7 and the outer ring 73 can be made of the same material, such as copper, lead-nickel alloy, carbon steel, silver or gold. The inner ring 71, the connector 7 and the outer ring 73 can be integrally formed or welded.

[0041] Please refer to Figure 1 In some examples, the inner ring 71 is coaxially distributed with the outer ring 73. The coaxial distribution of the inner ring 71 and the outer ring 73 can make the distribution of the grounding column 4 and the conductive paper more uniform, and the charges on the unit volume of soil are closer when the soil is conductive, thereby avoiding the generation of local current backflow.

[0042] In some examples, the inner ring 71 and the outer ring 73 may also be distributed in different axes. For example, when the grounding column 4 is close to a door body or other pedestrian areas, a gap may be formed in the area or the outer ring 73 may be moved away from the area, thereby improving the overall safety of the structure and avoiding the possibility of step voltage.

[0043] Please refer to Figure 1 In some examples, the connector 7 is an arc-shaped rod or a straight rod. Both the straight rod and the arc-shaped rod can meet the requirement of fixed connection between the inner ring 71 and the outer ring 73.

[0044] In some examples, when the connector 7 is an arc-shaped rod, the arc center of the arc-shaped rod may be located below the arc-shaped rod, so that the connector 7 as a whole extends deep underground.

[0045] When the connecting body 7 is a straight rod, the straight rod can be arranged obliquely or horizontally.

[0046] Please refer to Figure 1In some examples, the weak current box lightning protection grounding structure further includes a protective layer 42, which is disposed outside the grounding column 4, is fixedly connected to the grounding column 4, and is made of an insulating material. The protective layer 42 can protect the grounding column 4 from being scratched, and can also prevent surrounding flammable materials from catching fire or people from getting electric shock when conducting electricity.

[0047] In some examples, the protective layer 42 may be made of an insulating material, specifically a rubber material, or a synthetic material, such as a composite layer of rubber and plastic.

[0048] Please refer to Figure 1 In some examples, the weak current box lightning protection grounding structure further includes a clamp 43, which is disposed outside the protective layer 42 and is used to fix the grounding column 4 to the preset wall. The clamp 43 is used to stabilize the installation of the grounding column 4 located on the ground.

[0049] In some examples, there may be multiple clamps 43 , and the specific number of clamps 43 may be determined according to the length of the grounding column 4 on the ground. For example, a clamp 43 may be provided at intervals of 0.5 m to 2 m, so that the grounding column 4 can be installed stably.

[0050] Please refer to Figure 1 In some examples, a wiring terminal 41 is provided at the upper end of the grounding column 4, and the lightning induction line 3 is detachably connected to the wiring terminal 41, and the lightning induction line 3 is electrically connected to the wiring terminal 41. The wiring terminal 41 can make the lightning induction line 3 and the grounding column 4 detachable, which is helpful for the installation and maintenance of the weak current box.

[0051] In some examples, the terminal block 41 may be a terminal block 41 used in conventional circuits, which can achieve a stable connection between the lightning conductor line 3 and the terminal block through a movable buckle, and is easy to disassemble.

[0052] In some examples, there may be one or more wiring terminals 41 , and multiple wiring terminals 41 can make the connection between the lightning conductor line 3 and the grounding column 4 more stable.

[0053] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0054] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A lightning protection grounding structure for a weak current box, characterized in that: include: Metal housing; A lightning rod is arranged on the metal casing; A lightning induction line is arranged on the metal casing, and the lightning induction line is electrically connected to the lightning rod; A grounding post is arranged outside the metal housing, the grounding post is electrically connected to the lightning induction line, the grounding post and the lightning induction line are detachably connected, and a portion of the grounding post extends underground; An embedded part is arranged underground, a mounting hole is formed on the embedded part, the grounding post passes through the mounting hole and the grounding post is fixedly connected to the embedded part; A conductive column is arranged underground, one end of which is fixedly connected to the underground portion of the grounding column, the conductive column is electrically connected to the grounding column, and the other end of the conductive column extends downward and in a direction away from the grounding column.

2. The lightning protection grounding structure for a weak current box according to claim 1 is characterized in that: The conductive posts are provided in plurality, and the plurality of conductive posts are distributed around the grounding post at intervals.

3. The lightning protection grounding structure for a weak current box according to claim 2 is characterized in that: In a cross section perpendicular to the axis of the grounding post, the plurality of conductive posts are evenly distributed.

4. The lightning protection grounding structure for a weak current box according to claim 2 is characterized in that: The lightning protection grounding structure of the weak current box also includes a connector, which is able to conduct electricity and is arranged between the grounding column and the conductive column. The connector includes an inner ring, a connector and an outer ring. The inner ring is sleeved on the underground portion of the grounding column, the outer ring is arranged on the outside of the inner ring, the connector is arranged between the outer ring and the inner ring, the connector fixedly connects the inner ring and the outer ring, and the conductive column is fixedly connected to the outer ring.

5. The lightning protection grounding structure for a weak current box according to claim 4 is characterized in that: The inner ring and the outer ring are coaxially distributed.

6. The lightning protection grounding structure for a weak current box according to claim 4 is characterized in that: The connecting body is an arc-shaped rod or a straight rod.

7. The lightning protection grounding structure for a weak current box according to any one of claims 1 to 6, characterized in that: The low-voltage box lightning protection grounding structure also includes a protective layer, which is arranged outside the grounding column, the protective layer is fixedly connected to the grounding column, and the protective layer is made of an insulating material.

8. The lightning protection grounding structure for a weak current box according to claim 7 is characterized in that: The lightning protection grounding structure of the weak current box also includes a clamp, which is arranged outside the protective layer and is used to fix the grounding column to a preset wall.

9. The lightning protection grounding structure for a weak current box according to claim 1 is characterized in that: A wiring terminal is arranged at the upper end of the grounding column, and the lightning induction line is detachably connected to the wiring terminal, and the lightning induction line is electrically connected to the wiring terminal.

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