Protection mechanism
By installing discharge components and grounding down conductors on the towers, and combining this with control components to monitor the current, the problem of damage to the cement layer caused by lightning strikes on the towers was solved, thus improving the protection of the towers and the reliability of power supply.
Patent Information
- Application Number
- CN202422561530.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-10-23
AI Technical Summary
Power distribution line towers are susceptible to lightning strikes, which can cause the cement layer of the towers to break down and peel off, seriously affecting the reliability of power supply. Existing prevention methods are insufficient.
Design a protection mechanism including a tower assembly and a discharge assembly. The discharge assembly introduces lightning into the ground and the current is conducted into the earth through a grounding down conductor. The control assembly monitors the current and controls the closing of a switch to introduce underground current.
It effectively prevents the cement layer of the tower from breaking down, reduces lightning damage, improves power supply reliability and safety, and monitors current to handle overvoltage risks in a timely manner.
Smart Images
Figure CN223843510U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lightning protection and grounding technology for power poles and towers, and in particular to a protection mechanism and a device for detecting induced lightning on power distribution line towers. Background Technology
[0002] Power distribution line towers are an important component of power distribution lines. In sections or areas where lightning strikes are frequent, power distribution line towers are particularly vulnerable to lightning strikes, which can cause the cement layer of the towers to break down and peel off, resulting in tower damage and even tower collapse, seriously affecting the reliability of power supply from the power distribution lines.
[0003] However, traditional methods for lightning protection of power distribution line towers have largely neglected this aspect, making existing technologies ineffective in meeting the actual lightning protection needs of power distribution networks. Therefore, to address these issues, we provide a protection mechanism and a device for detecting induced lightning strikes on power distribution line towers. Utility Model Content
[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.
[0005] In view of the problem that towers are susceptible to lightning strikes, which can lead to the breakdown and peeling of the cement layer in the towers, as described above or in the prior art, this utility model is proposed.
[0006] Therefore, the purpose of this utility model is to provide a protective mechanism.
[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a pole and tower assembly, including a pole and tower, a crossbar connected to the upper end of the pole and tower, and an insulator disposed at the top of the crossbar; and a discharge assembly, wherein the discharge assembly is disposed between the pole and tower and the crossbar, including a discharge element connected between the crossbar and the ground, and a grounding lead wire connected between the pole and tower and the ground.
[0008] As a preferred embodiment of the protection mechanism of this utility model, the discharge component includes a first wire connected to the crossbar, a discharge gap connected to the first wire, and a second wire connected between the discharge gap and the tower.
[0009] As a preferred embodiment of the protection mechanism of this utility model, the power frequency grounding resistance of the lead-in wire is less than 10Ω.
[0010] As a preferred embodiment of the protection mechanism of this utility model, the discharge gap is composed of two hemispherical copper materials.
[0011] As a preferred embodiment of the protection mechanism of this utility model, the gap distance of the discharge gap is such that, under the action of an applied 20kV AC voltage, the discharge gap can reliably discharge under standard atmospheric pressure for a duration of 2.6ms.
[0012] As a preferred embodiment of the protection mechanism of this utility model, the second wire forms a reliable electrical connection with the internal steel reinforcement of the tower.
[0013] The beneficial effects of this utility model are as follows: By setting up a tower assembly and a discharge assembly, when the discharge gap breaks down, the current is introduced into the ground through the grounding lead, thus avoiding the breakdown and peeling of the tower cement layer.
[0014] However, in actual use, there is still a problem that the current cannot be monitored.
[0015] To solve the above-mentioned technical problems, this utility model also provides the following technical solution: a power distribution line tower induced lightning detection device includes a protection mechanism and a control component, the control component being connected between a discharge element and a grounding down conductor, including a control element disposed between the discharge element and the grounding down conductor, and a closing switch disposed on the grounding down conductor.
[0016] As a preferred embodiment of the power distribution line tower induced lightning detection device of this utility model, the control component includes a voltage transformer installed on the second wire, a current-limiting resistor electrically connected to the voltage transformer, and an electromagnet.
[0017] As a preferred embodiment of the induced lightning detection device for power distribution line towers of this utility model, the electromagnet and the closing switch constitute an integrated device.
[0018] As a preferred embodiment of the induced lightning detection device for power distribution line towers of this utility model, wherein: the primary side of the voltage transformer monitors the current value from the discharge gap to the inner layer of steel reinforcement of the tower, and the secondary side of the voltage transformer is connected to an electromagnet.
[0019] The beneficial effects of this utility model are: by setting up a control component, when the current on the line is detected to exceed 1A, the control switch is activated to introduce the current in the circuit into the ground. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0022] Figure 2 for Figure 1 A magnified view of A in the middle. Detailed Implementation
[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.
[0026] Example 1
[0027] Reference Figure 1 This is the first embodiment of the present invention. This embodiment provides a protection mechanism that can protect the cement layer of the tower. It includes a tower assembly 100 and a discharge assembly 200. The discharge assembly 200 protects the tower assembly 100. The discharge assembly connects the tower assembly 100 and the ground, and introduces lightning into the ground to prevent lightning from penetrating the cement layer of the tower, thereby avoiding damage to the tower and preventing tower collapse accidents.
[0028] Specifically, the pole assembly 100 includes a pole 101, a crossbar 102 connected to the upper end of the pole 101, and an insulator 103 disposed at the top of the crossbar 102; the crossbar 102 is horizontally disposed at the upper end of the pole 101, and multiple insulators 103 are disposed at the top of the crossbar 102, with wires connected between the insulators 103, and steel bars are disposed inside the pole 101.
[0029] Furthermore, a discharge assembly 200 is disposed between the tower 101 and the crossbar 102, including a discharge element 201 connected between the crossbar 102 and the ground, and a grounding down conductor 202 connected between the tower 101 and the ground. By establishing a reliable electrical connection between the discharge element 201 and the crossbar 102 and the internal reinforcing steel of the tower 101, and then conducting lightning to the ground through the grounding down conductor 202, the outer cement layer of the tower 101 is protected.
[0030] Operation process: Connect the discharge component 201 to the steel bars inside the crossbar 102 and the steel tower 101 to form a reliable electrical connection. Then connect the discharge component 201 to the ground through the grounding down conductor 202. The lightning that strikes the tower 101 or the crossbar 102 is led to the ground through the grounding down conductor 202 to protect the cement layer on the outside of the tower.
[0031] In summary, by installing the pole assembly 100 and the discharge assembly 200, lightning strikes on the pole can be diverted to the ground, protecting the outer cement layer of the pole and preventing its collapse.
[0032] Example 2
[0033] Reference Figure 1 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides further optimization of the protection mechanism, solving the problem of how to protect the cement layer of the tower. It includes the discharge element 201 comprising a first wire 201a connected to the crossbar 102, a discharge gap 201b connected to the first wire 201a, and a second wire 201c connected between the discharge gap 201b and the tower 101. One end of the discharge gap 201b is connected to the crossbar 102 via the first wire 201a, and the other end of the discharge gap 201b is connected to the reinforcing steel inside the tower 101 via the second wire 201c, thus forming a reliable electrical connection between the crossbar 102, the discharge gap 201b, and the tower 101.
[0034] Specifically, the power frequency grounding resistance of the down conductor is less than 10Ω. A power frequency grounding resistance of less than 10Ω allows the current to flow into the ground more quickly when lightning strikes tower 101, effectively dissipating the lightning current and reducing damage to the cement layer on the outside of tower 101.
[0035] Furthermore, the discharge gap 201b is composed of two hemispherical copper materials. The discharge gap 201b, typically composed of two hemispherical copper materials, is primarily used for lightning protection and overvoltage protection. A certain distance is maintained between the two hemispherical copper materials, and this distance can be adjusted as needed. In the event of a transient overvoltage (such as a lightning strike), the gap can be quickly broken down, diverting the overvoltage to the ground, thereby protecting the outer cement layer of the tower from damage.
[0036] Furthermore, the gap distance of the discharge gap 201b is such that, under the applied 20kV AC voltage, the discharge gap 201b can reliably discharge at standard atmospheric pressure for a duration of 2.6ms. The discharge gap 201b can reliably discharge within 2.6ms under 20kV AC voltage, effectively protecting the outer cement layer of tower 101 from overvoltage damage; it helps prevent electric arcing, reduces the risk of lightning strikes, improves insulation compatibility, ensures stable system operation, reduces equipment damage, and enhances safety and reliability.
[0037] Preferably, the second wire 201c forms a reliable electrical connection with the internal reinforcing steel of the tower 101. This ensures that current can flow smoothly from the wire to the tower's grounding system, thereby effectively and safely guiding current generated by lightning strikes or other overvoltage conditions to the ground and reducing damage to the outer cement layer of the tower.
[0038] Operation process: One end of the discharge gap 201b is connected to the crossbar 102 via the first current 201a, and the other end of the discharge gap 201b is connected to the steel reinforcement inside the tower 101 via the second wire 201c, thus forming a reliable electrical connection between the discharge gap 201b, the crossbar 102, and the steel reinforcement inside the tower 101. Then, the grounding down conductor 202 is connected to the second wire 201c. When the tower and crossbar are struck by lightning, the discharge gap 201b is broken down, and the current is introduced into the ground through the grounding down conductor 202, thereby protecting the outer cement layer of the tower 101.
[0039] In summary, by installing the discharge component 201 and the grounding down conductor 202, lightning on the tower 101 can be conducted to the ground, thus protecting the outer cement layer of the tower 101.
[0040] Example 3
[0041] Reference Figures 1-2This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a lightning detection device for power distribution line towers, solving the problem of monitoring line current. It includes a control component 300 connected between the discharge element 201 and the grounding down conductor 202. The control component 300 includes a control element 301 disposed between the discharge element 201 and the grounding down conductor 202, and a pull-in switch 302 disposed on the grounding down conductor 202. When the discharge gap 201b is broken down, the ball gap generates current in the steel reinforcement inside the tower 101. The control element 301 monitors the current in its line. When the generated current is greater than 1A, the control element 301 controls the pull-in switch 302 to close, the grounding down conductor 202 becomes conductive, and the current is introduced to the ground from the grounding down conductor 202. In this invention, both the control element 301 and the pull-in switch are disposed within a housing, which is fixed between the grounding down conductor 202 and the second wire 201c.
[0042] Specifically, the control unit 301 includes a voltage transformer 301a mounted on the second wire 201c, a current-limiting resistor 301b electrically connected to the voltage transformer 301a, and an electromagnet 301c. The current-limiting resistor 301b is provided on the primary side of the voltage transformer 301a to prevent excessive current from burning out the transformer.
[0043] Furthermore, the electromagnet 301c and the pull-in switch 302 form an integrated device. When current is detected, the electromagnet operates to attract the pull-in switch 302, causing the pull-in switch 302 to close and the grounding lead 202 to become conductive.
[0044] Furthermore, the primary side of the voltage transformer 301a monitors the current value from the discharge gap to the inner layer of the tower reinforcement, and the secondary side of the voltage transformer 301a is connected to the electromagnet 301c. After the pull-in switch 302 is closed, the switch limit is maintained, keeping the switch in the closed state for 2 seconds. After 2 seconds, the switch is opened, returning to the previous state.
[0045] Operating Procedure: A voltage transformer 301a is installed on the second wire 201c. An electromagnet 301c is connected to the secondary side of the voltage transformer 301a. A closing switch 302 is installed on one side of the electromagnet 301c. When the discharge gap 201b is broken down, the ball gap generates current to the internal steel bars of the tower 101. The voltage transformer 301a monitors this current. When the detected current is greater than 1A, the control unit 301 controls the closing switch 302 to close, and the grounding down conductor 202 is connected, allowing the current to be introduced to the ground through the grounding down conductor 202.
[0046] In summary, by setting up the control component 300, the current in the line can be monitored, and the closing of the pull-in switch 302 can be controlled to make the grounding lead-down wire 202 conduct, so that the current is introduced into the ground.
[0047] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (variations in installation arrangement, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure performing the function described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of this utility model. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.
[0048] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments may be omitted.
[0049] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine task in design, manufacturing, and production without requiring extensive experimentation.
[0050] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A protective mechanism, characterized in that: include, The pole assembly (100) includes a pole (101), a crossbar (102) connected to the upper end of the pole (101), and an insulator (103) disposed at the top of the crossbar (102); and, The discharge assembly (200) is disposed between the tower (101) and the crossbar (102), and includes a discharge element (201) connected between the crossbar (102) and the ground, and a grounding lead (202) connected between the tower (101) and the ground.
2. The protection mechanism as described in claim 1, characterized in that: The discharge device (201) includes a first wire (201a) connected to the crossbar (102), a discharge gap (201b) connected to the first wire (201a), and a second wire (201c) connected between the discharge gap (201b) and the tower (101).
3. The protection mechanism as described in claim 1, characterized in that: The power frequency grounding resistance of the grounding lead (202) is less than 10Ω.
4. The protection mechanism as described in claim 2, characterized in that: The discharge gap (201b) is composed of two hemispherical copper materials.
5. The protection mechanism as described in claim 2, characterized in that: The gap distance of the discharge gap (201b) is such that, under the action of an applied AC voltage of 20kV, the discharge gap (201b) can reliably discharge at standard atmospheric pressure for a duration of 2.6ms.
6. The protection mechanism as described in claim 2, characterized in that: The second wire (201c) forms a reliable electrical connection with the internal steel bars of the tower (101).