Lightning protection transformer

Abstract

The lightning protection transformer comprises a transformer body, a power connection pile and a plurality of ray devices, the grounding end of the transformer body is electrically connected with the surface of the power connection pile through a wire, a plurality of ray holes are formed in the surface of the power connection pile, and the ray devices are fixed in the ray holes. An excitation wire harness used for electrifying the ray device is arranged in the power connection pile, the ray device comprises an excitation seat, a ray tube, a bullet head part and an electrode wire, and a detonator connected with the excitation wire harness is fixedly mounted at one end of the excitation seat. According to the utility model, through the arrangement of the novel transformer grounding structure, the power connection pile is nailed into the ground of the foundation, and the bullet traction electrode lead is led out to be in contact with the ground in an explosion jet mode, so that a dense root-shaped electrode network structure is formed, and the power connection effect with the foundation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a lightning protection transformer. Background Art

[0002] Distribution transformers are widely used key power equipment, and lightning protection for distribution transformers is an important topic. More than 1% of distribution transformers in the country are damaged by lightning strikes, and up to 5% in areas with frequent lightning strikes. Lightning strikes not only damage distribution transformers and electrical equipment, but may also cause large-scale power outages. Distribution transformer grounding methods Distribution transformers usually use two grounding methods: one is that the distribution transformer uses a high-voltage lightning arrester to lead down the line, and the neutral point on the low-voltage side of the transformer, the zero line and the transformer casing are connected together for common grounding.

[0003] The existing grounding structure of lightning protection transformers is mainly vertical grounding bodies on flat ground with low and uniform soil resistivity; on hillsides with low and uneven soil resistivity, horizontal grounding bodies are mainly used. Different grounding methods need to be used according to different ground surfaces to achieve a good grounding effect. They are mainly composed of columnar piles or flat electrodes. The construction method is cumbersome and the grounding effect is unstable. In view of this, the existing problems are studied and improved, and a lightning protection transformer is provided to solve the current problems. The purpose is to solve the problems and improve the practical value through this technology. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0005] To this end, the technical solution adopted by the utility model is: a lightning protection transformer, comprising: a transformer body, a power connection post and a plurality of radiators, the grounding end of the transformer body is electrically connected to the surface of the power connection post through a wire, the surface of the power connection post is provided with a plurality of radiator holes, and the radiator is fixed inside the radiator holes, the inside of the power connection post is provided with an excitation wire bundle for the radiator to pass current, the radiator comprises an excitation seat, a radiator tube, a warhead and an electrode wire, one end of the excitation seat is fixedly mounted with a detonator connected to the excitation wire bundle, the inside of the excitation seat is provided with a gunpowder part, the radiator tube is fixedly mounted on one end of the excitation seat and the warhead and the electrode wire are located on the inner side of the radiator tube, the other end of the radiator tube is provided with a sealing flap sleeved on the outer periphery of the warhead, the electrode wire is spirally arranged on the inner side of the radiator tube and the two sections are respectively fixedly connected to the surfaces of the excitation seat and the warhead.

[0006] In a preferred example, the utility model can be further configured as follows: a plurality of the ray holes are evenly arranged on the surface of the connection post in a spiral direction, and the opposite sides of the ray holes are inclined downward along the axis of the connection post.

[0007] In a preferred example, the utility model can be further configured as follows: a protective film is provided on the inner side of the ray hole close to the outer periphery of the power connection pile, the protective film is used for waterproof sealing of the ray hole, and the protective film is a silicone diaphragm structure with a thickness of less than 3mm.

[0008] In a preferred example, the present invention can be further configured as follows: the excitation seat and the power connection post are metal components, and the electrode conductor is a soft copper wire bare wire structure.

[0009] In a preferred example, the utility model can be further configured as follows: the end layer of the bullet head is cone-shaped and exposed on the outside of the sealing flap, the sealing flap is a multi-petal combination structure, and the outer periphery is in sliding contact with the inner wall of the ray hole.

[0010] In a preferred example, the utility model can be further configured as follows: a beam flange is provided at the bottom end of the excitation seat, and the beam flange is an inverted cone structure that gradually shrinks along the excitation seat to the surface of the bullet head, and one end of the bullet head is interference-fitted on the inner side of the beam flange.

[0011] The beneficial effects achieved by the utility model are:

[0012] 1. In the utility model, a new transformer grounding structure is provided, and the power connection pile is nailed into the ground surface, and the warhead pulls the electrode wire to contact the ground by using an explosive jet method, thereby forming a dense root-like electrode network structure, thereby improving the power connection effect with the foundation.

[0013] 2. In the utility model, the lightning protection ground wire of the transformer body is grounded by setting a pile foundation type power connection pile structure, the power connection pile is buried and the gunpowder part is activated with one button to lead the electrode wire to the ground. It is easy to use, can cope with various soil structures, and improve the installation efficiency of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0015] Figure 2 A schematic diagram of the cross-sectional structure of a power connection pile according to an embodiment of the utility model;

[0016] Figure 3 The figure is a schematic diagram of the cross-sectional structure of a ray emitter according to an embodiment of the utility model.

[0017] Reference numerals:

[0018] 100, transformer body; 200, power connection post; 210, ray hole; 220, excitation wire bundle; 211, protective film;

[0019] 300, ray generator; 310, excitation seat; 320, ray tube; 330, warhead; 340, electrode wire; 311, gunpowder section; 312, detonator; 313, beam flange; 321, sealing flap. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0021] A lightning protection transformer provided by some embodiments of the utility model is described below in conjunction with the accompanying drawings.

[0022] Combination Figure 1-3 As shown, the utility model provides a lightning protection transformer, comprising: a transformer body 100, a power connection post 200 and a plurality of ray detectors 300, the grounding end of the transformer body 100 is electrically connected to the surface of the power connection post 200 through a wire, a plurality of ray holes 210 are opened on the surface of the power connection post 200, and the ray detector 300 is fixed inside the ray holes 210, an excitation wire bundle 220 for passing current through the ray detector 300 is arranged inside the power connection post 200, and the ray detector 300 comprises an excitation seat 310, a ray tube 320, a warhead 330 and an electrode wire 340, a detonator 312 connected to the excitation harness 220 is fixedly mounted at one end of the excitation seat 310, a gunpowder portion 311 is arranged inside the excitation seat 310, a ray tube 320 is fixedly mounted at one end of the excitation seat 310, and a warhead portion 330 and an electrode wire 340 are located on the inner side of the ray tube 320, a sealing flap 321 sleeved on the outer periphery of the warhead portion 330 is arranged at the other end of the ray tube 320, the electrode wire 340 is spirally arranged on the inner side of the ray tube 320, and two sections are respectively fixedly connected to the surfaces of the excitation seat 310 and the warhead portion 330.

[0023] In this embodiment, a plurality of ray holes 210 are evenly arranged on the surface of the connection post 200 in a spiral direction, and the opposite directions of the ray holes 210 are inclined downward along the axis of the connection post 200 .

[0024] Specifically, a plurality of ray holes 210 are used to install and guide the movement of the ray device 300 so that the electrode wire bundle is evenly dispersed and released along the outer periphery of the charging post 200 .

[0025] In this embodiment, a protective film 211 is provided on the inner side of the ray hole 210 close to the outer periphery of the power connection post 200. The protective film 211 is used for waterproof sealing of the ray hole 210. The protective film 211 is a silicone membrane structure with a thickness of less than 3 mm.

[0026] Specifically, the protective film 211 is used to seal the port of the ray hole 210 to facilitate the penetration and extraction of the bullet head 330 .

[0027] In this embodiment, the excitation base 310 and the power connection post 200 are metal components, and the electrode wire 340 is a soft copper wire bare wire structure.

[0028] Specifically, the conductive properties of the excitation base 310, the power connection post 200 and the electrode wire 340 are utilized to connect the ground wire of the transformer body 100 to the electrode of the ground formation, thereby realizing the introduction of the ground current.

[0029] In this embodiment, the end of the bullet head 330 is cone-shaped and exposed outside the sealing flap 321 . The sealing flap 321 is a multi-flap combination structure, and the outer periphery is in sliding contact with the inner wall of the ray hole 210 .

[0030] Specifically, after the gunpowder unit 311 is ignited, the explosion pressure can be blocked by the sealing flap 321 along the entire action area of ​​the bullet head 330 and the surface of the sealing flap 321 inside the ray hole 210, thereby improving the effect of the gunpowder unit 311, and after the sealing flap 321 and the bullet head 330 are separated from the ray hole 210, the sealing flap 321 automatically splits and separates from the surface of the bullet head 330, so that a greater propulsion effect can be formed by using a small amount of gunpowder unit 311, reducing the amount of medicine used to improve safety.

[0031] In this embodiment, a beam flange 313 is provided at the bottom end of the excitation base 310 , and the beam flange 313 is an inverted cone structure that gradually shrinks along the excitation base 310 to the surface of the bullet head 330 , and one end of the bullet head 330 is interference fit on the inner side of the beam flange 313 .

[0032] Specifically, the beam flange 313 is used to guide the explosion jet of the gunpowder part 311 , and the force is applied to the surface of the bullet part 330 , so as to avoid unnecessary damage to the electrode wire 340 inside the ray tube 320 .

[0033] The working principle and use process of this utility model:

[0034] During the installation of the lightning protection transformer, the power connection pile 200 is driven into the ground or buried in the ground by a pile driver, and the detonator 312 and the gunpowder part 311 are detonated by connecting the excitation current to the excitation wire harness 220. The explosion pressure of the gunpowder part 311 is used to push the warhead 330 along the ray tube 320 and the ray hole 210 to penetrate the protective film 211 and shoot into the soil layer. The warhead 330 is used to pull the electrode wire 340 to release the movement, so that the electrode wire 340 is introduced into the ground, and the electrode wire 340 is introduced into the ground. The tension after all the wires 340 are extracted and the resistance of the soil layer consumes the power of the bullet head 330. After all the electrode wires 340 are released, the kinetic energy of the bullet head 330 is completely eliminated. Several ray detectors 300 arranged in a spiral direction are synchronously excited to form a root-like dense power grid structure composed of several electrode wires 340, which is tightly grounded to the soil layer. The surface of the power connection pile 200 and the grounding line of the transformer body 100 can be connected. The dense root-like electrode network structure improves the power connection effect between the transformer and the foundation.

[0035] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lightning protection transformer, characterized in that: The invention comprises: a transformer body (100), a power connection post (200) and a plurality of radiators (300); the grounding end of the transformer body (100) is electrically connected to the surface of the power connection post (200) through a wire; a plurality of radiator holes (210) are provided on the surface of the power connection post (200); the radiator (300) is fixed inside the radiator holes (210); an excitation wire bundle (220) for passing current through the radiator (300) is provided inside the power connection post (200); the radiator (300) comprises an excitation seat (310), a radiator tube (320), a warhead (330) and an electrode wire (340); the excitation seat ( A detonator (312) connected to an excitation wire bundle (220) is fixedly mounted on one end of the excitation seat (310); a gunpowder portion (311) is arranged inside the excitation seat (310); the ray tube (320) is fixedly mounted on one end of the excitation seat (310); a bullet portion (330) and an electrode wire (340) are located inside the ray tube (320); a sealing flap (321) sleeved on the outer periphery of the bullet portion (330) is arranged on the other end of the ray tube (320); the electrode wire (340) is spirally arranged on the inner side of the ray tube (320); and two sections of the electrode wire (340) are respectively fixedly connected to the surfaces of the excitation seat (310) and the bullet portion (330).

2. A lightning protection transformer according to claim 1, characterized in that: A plurality of the ray holes (210) are evenly arranged in a spiral direction on the surface of the power connection post (200), and the opposite direction of the ray holes (210) is inclined downward along the axis of the power connection post (200).

3. A lightning protection transformer according to claim 1, characterized in that: A protective film (211) is provided on the inner side of the ray hole (210) close to the outer periphery of the power connection post (200), and the protective film (211) is used for waterproof sealing of the ray hole (210). The protective film (211) is a silicone diaphragm structure and has a thickness of less than 3 mm.

4. A lightning protection transformer according to claim 1, characterized in that: The excitation seat (310) and the power connection post (200) are metal components, and the electrode lead (340) is a soft copper wire bare wire structure.

5. A lightning protection transformer according to claim 1, characterized in that: The end layer of the bullet head (330) is cone-shaped and exposed on the outside of the sealing flap (321). The sealing flap (321) is a multi-flap combined structure, and the outer periphery is in sliding contact with the inner wall of the ray hole (210).

6. A lightning protection transformer according to claim 1, characterized in that: A beam flange (313) is provided at the bottom end of the excitation seat (310), and the beam flange (313) is in an inverted cone structure that gradually shrinks along the excitation seat (310) to the surface of the bullet head (330), and one end of the bullet head (330) is interference-fitted on the inner side of the beam flange (313).

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