A transformer grounding structure

Abstract

This invention relates to the field of grounding conductivity technology and discloses a transformer grounding structure, including a grounding rod and a grounding wire. One end of the grounding wire is connected to an end piece, and a fixed cylinder is installed at the bottom of the end piece. The fixed cylinder has a threaded groove. The top of the grounding rod is connected to a plug for insertion into the end piece. A conductive limiting member is fitted around the plug for threaded engagement with the fixed cylinder. Multiple circumferentially arranged branch grounding members are detachably connected to the bottom of the conductive limiting member. Multiple branching members are connected to the grounding wire and are detachably connected to the conductive limiting member. These branching members form multiple electrical connection structures with the branching grounding members. This invention achieves tight sealing between the plug and the end piece through the threaded connection between the conductive limiting member and the fixed cylinder, constructing multiple current conduction channels to improve current discharge capacity. It also provides a redundant electrical connection structure to offer a backup conductive path when the main path fails, ensuring grounding stability.

Description

Technical Field

[0001] This invention relates to the field of grounding and conductivity technology, and in particular to a transformer grounding structure. Background Technology

[0002] In power transmission and distribution systems, transformers can transform AC voltage. By changing the turns ratio of the primary and secondary coils, they convert AC voltage and current of a certain level into voltage and current of another level at the same frequency to meet the specific voltage requirements of different electrical equipment and ensure that power can be safely transmitted to various power-consuming locations. In practical applications, to ensure the stable operation of transformers and the safety of personnel and equipment, a grounding wire is usually connected to the transformer. The bottom of the grounding wire is connected to a grounding pin inserted into the ground. The grounding pin can form a low-impedance electrical connection with the earth. The grounding wire on the transformer has multiple functions. On the one hand, when a fault such as insulation damage occurs inside the transformer, causing a short circuit between the live parts and the casing, the grounding wire can quickly conduct the fault current to the earth, preventing the casing from becoming live and preventing electric shock accidents. On the other hand, the grounding wire can also provide a discharge path for overvoltages such as lightning. When the transformer is struck by lightning, the lightning current can be conducted to the earth through the grounding wire, thereby protecting the transformer and other electrical equipment from lightning damage and ensuring the stable operation of the entire power system.

[0003] Grounding pins are typically equipped with connecting plates for connecting to the grounding wire. This connection is usually secured by tightening bolts and nuts. Since transformers are usually installed outdoors, the connection between the grounding wire and the grounding pin is exposed. The area around transformers is often occupied by construction work, vehicles, and other activities. When large vehicles pass near a transformer, the severe bumps caused by uneven road surfaces, or excavation and hoisting operations during construction, can accidentally collide with the grounding wire or grounding pin. This instantaneous or continuous external impact is transmitted to the bolt and nut structure at the connection point, causing it to loosen. Once the bolt and nut loosen, the tightness of the connection between the grounding wire and the grounding pin will be compromised, preventing proper contact and significantly reducing the current conduction effect, posing a potential risk to the transformer's operation.

[0004] To address the aforementioned issues, this application proposes a transformer grounding structure. Summary of the Invention

[0005] This invention proposes a transformer grounding structure that solves the problem in related technologies where transformers are installed outdoors, the connection between the grounding pin and the grounding wire is exposed, and external forces generated by surrounding activities can easily loosen the bolts and nuts at the connection, damaging electrical contact, reducing the current conduction effect, and posing risks to the operation of the transformer.

[0006] The present invention proposes a transformer grounding structure, comprising a grounding rod and a grounding wire;

[0007] One end of the grounding wire is connected to an end piece, and a fixing cylinder is installed at the bottom of the end piece. A threaded groove is opened inside the fixing cylinder. The top of the grounding rod is connected to a plug for inserting and engaging with the end piece. A conductive limiting component for threaded engagement with the fixing cylinder is fitted around the outer periphery of the plug.

[0008] The bottom of the conductive limiting component is detachably connected to multiple circumferentially arranged branch grounding components, and the grounding wire is connected to multiple branch wires detachably connected to the conductive limiting component. The multiple branch wires are used to form a multi-way electrical connection structure with the multiple branch grounding components.

[0009] When the conductive limiting component is threadedly connected to the fixed cylinder, the plug and the end piece are inserted and mated, and the conductive limiting component and the end piece contact to form an electrical connection structure, thus sealing the bottom of the fixed cylinder.

[0010] As a further optimization of the present invention, the end piece includes an outer shell and an end head, the fixing cylinder is installed at the bottom of the outer shell, the end head extending into the fixing cylinder is installed inside the outer shell, and the plug is used to insert and cooperate with the end head.

[0011] As a further optimization of the present invention, the end head includes an end core and a first conductive ring. A loading cavity is provided inside the outer shell. The end core is installed in the loading cavity and extends into the fixed cylinder. The bottom of the end core is fixedly fitted with the first conductive ring located inside the fixed cylinder. An insertion cavity is provided inside the end core. One end of the grounding wire is connected to the end core.

[0012] As a further optimization of the present invention, the plug-in includes a conductive core and a conductive round seat. The conductive core is installed at the top of the grounding rod. A protrusion adapted to the insertion cavity is connected to the top of the conductive core. A conductive round seat is fixed to the bottom of the conductive core. A bushing sleeve fitted on the grounding rod is fixed to the bottom of the conductive round seat. The conductive limiting component is fitted on the conductive core and the conductive round seat.

[0013] As a further optimization of the present invention, the conductive limiting component includes a threaded cylinder, which is fitted onto a conductive core and a conductive round base. The outer circumference of the threaded cylinder is integrally formed with external threads, and the threaded cylinder is used to connect with the threaded groove inside the fixed cylinder. A second conductive ring is fixed at the top of the threaded cylinder for contacting the surface of the first conductive ring. The bottom of the threaded cylinder is connected to multiple circumferentially arranged main female ends. Each of the multiple main female ends is connected to a main guide line, and a branch insertion component is used for detachable connection with the main female ends. Each of the multiple main guide lines is connected to an auxiliary docking part, and multiple branch components are detachably connected to the multiple auxiliary docking parts respectively.

[0014] As a further optimization of the present invention, a sealing ring is fixedly fitted at the bottom of the threaded cylinder, and the sealing ring is used to abut against the bottom of the fixed cylinder and seal its interior.

[0015] As a further optimization of the present invention, the auxiliary docking part includes a guide wire and an auxiliary female end. Multiple circumferentially arranged auxiliary female ends are installed on the outer periphery of the sealing ring body. The ends of the multiple auxiliary female ends are connected to guide wires. Multiple guide wires are respectively connected to multiple main guide wires. Multiple branch wires are respectively used for detachable connection with multiple auxiliary female ends.

[0016] As a further optimization of the present invention, the branch grounding component includes branch conductors and grounding parts. The top ends of multiple branch conductors are connected to first connectors, and multiple first connectors are respectively inserted into multiple main female terminals. The bottom ends of multiple branch conductors are fixed with grounding parts for insertion into the ground.

[0017] As a further optimization of the present invention, the grounding part is a grounding rod, and the grounding rod is fixed to the bottom end of the branch conductor.

[0018] As a further optimization of the present invention, the splitter includes a connecting wire and a second connector. Multiple connecting wires are connected to the grounding wire, and one end of each of the multiple connecting wires is connected to a second connector. The multiple second connectors are used to detachably connect to multiple auxiliary female terminals.

[0019] The above-described technical solution of the present invention has the following beneficial technical effects:

[0020] 1. In use, the conductive limiting component is threadedly connected to the threaded groove inside the fixed cylinder. Under the action of the conductive limiting component, the plug-in is inserted and mated with the end piece. The conductive limiting component can achieve tightness between the plug-in and the end piece, and can also seal the bottom of the fixed cylinder, so that the connection between the plug-in and the end piece is in a sealed environment. Then, the grounding rod can be inserted into the ground to complete the assembly of the grounding structure. The above design achieves tightness between the contact surface of the plug-in and the end piece through the threaded connection structure of the conductive limiting component and the fixed cylinder, effectively avoiding loosening caused by external impact and vibration directly acting on the connection point. At the same time, the sealed environment isolates rainwater, dust and other factors from erosion of the grounding connection, avoiding poor contact caused by corrosion at the connection point, and improving the stability of the grounding structure.

[0021] 2. To form multiple current-conducting ground paths and improve the current-conducting ground effect on the transformer, after the conductive limiting component is connected to the fixed cylinder thread, the second conductive ring on the conductive limiting component contacts the first conductive ring in the end component, and multiple main conductors are connected to the bottom of the second conductive ring. Then, multiple branch grounding components are connected to the main female ends at the bottom of the multiple main conductors to form another current-conducting ground structure. The multiple branch grounding components are arranged circumferentially around the grounding rod. Then, the branch grounding components can be inserted into the ground. During the insertion of the branch grounding components into the ground, a downward force can be applied to the grounding rod to maintain the stability of the grounding rod insertion and effectively reduce its tilting during use. The above design constructs multiple current-conducting ground paths through the contact and cooperation of the second conductive ring and the first conductive ring. This not only reduces the grounding resistance and improves the discharge capacity, but also forms a radial support structure with the circumferentially arranged branch grounding components. This enhances its pull-out resistance and vertical stability, prevents the grounding rod from tilting or detaching due to soil loosening or external forces, and realizes the current dispersion into the ground, avoiding the risk of single-point grounding failure.

[0022] 3. If the threaded structure between the conductive limiting component and the fixed cylinder becomes loose during use, it will cause the plug and the end piece to loosen, and the second conductive ring on the conductive limiting component to detach from the end piece, thus affecting the grounding of the current on the transformer. To address this, auxiliary docking parts are connected to multiple main lines, and multiple branching parts are connected to the grounding line. The branching parts and auxiliary docking parts are detachably connected, forming an electrical connection structure from the grounding line to the auxiliary docking parts, main lines, and branch grounding parts. After the conductive limiting component is threadedly connected to the fixed cylinder, the branching parts are connected to the auxiliary docking parts. Even if the threaded structure becomes loose between the plug and the end piece due to vibration, and the second conductive ring detaches from the end piece, the transformer current can still be guided to the ground through the branching parts, auxiliary docking parts, and main lines to the branch grounding parts. This redundant electrical connection structure provides a backup conductive path when the main connection path fails, enabling switching under fault conditions and ensuring the continuous operation of the transformer and the safety of personnel and equipment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a transformer grounding structure proposed in this invention;

[0024] Figure 2 This is a schematic diagram of the separation structure of the fixed cylinder and the conductive limiting member in this invention;

[0025] Figure 3 This is a schematic diagram of the cooperative structure of the end piece, the fixing cylinder, the plug-in and the conductive limiting piece in this invention;

[0026] Figure 4 For the present invention Figure 3 The overall front view in the middle;

[0027] Figure 5 This is an internal sectional view of the end piece and the fixing cylinder in this invention;

[0028] Figure 6 This is a schematic diagram of the mating structure of the grounding wire, the terminal head, and the branching component in this invention;

[0029] Figure 7 This is a schematic diagram of the cooperation structure between the plug-in and the conductive limiting component in this invention;

[0030] Figure 8 For the present invention Figure 7 Enlarged view of A in the middle;

[0031] Figure 9 This is a schematic diagram of the branch insertion component in this invention.

[0032] Reference numerals: 1. Grounding rod; 2. Grounding wire; 3. End piece; 31. Outer shell; 32. End head; 321. End core; 3211. Insert cavity; 322. First conductive ring; 4. Insert; 41. Conductive core head; 411. Protrusion; 42. Conductive round seat; 421. Bushing; 5. Fixing cylinder; 6. Conductive limiting piece; 61. Threaded cylinder; 62. Second conductive ring; 621. Main conductor; 622. Main female end; 63. Auxiliary docking part; 631. Auxiliary conductor; 632. Auxiliary female end; 64. Sealing ring body; 7. Branch grounding piece; 71. Branch conductor; 711. First connector; 72. Grounding part; 721. Grounding rod; 8. Branch piece; 81. Connecting wire; 82. Second connector. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0034] like Figure 1-9 As shown, the transformer grounding structure proposed in this invention includes a grounding rod 1 and a grounding wire 2;

[0035] One end of the grounding wire 2 is connected to an end piece 3. A fixing cylinder 5 is installed at the bottom of the end piece 3, and a threaded groove is opened inside the fixing cylinder 5. The top of the grounding rod 1 is connected to a plug 4 for plugging and mating with the end piece 3. A conductive limiting piece 6 for threaded mating with the fixing cylinder 5 is fitted on the outer periphery of the plug 4.

[0036] The bottom of the conductive limiting component 6 is detachably connected to multiple circumferentially arranged branch grounding components 7, and the grounding wire 2 is connected to multiple branch wires 8 that are detachably connected to the conductive limiting component 6. The multiple branch wires 8 are used to form a multi-way electrical connection structure with the multiple branch grounding components 7.

[0037] When the conductive limiting component 6 is threadedly connected to the fixed cylinder 5, the plug-in 4 and the end component 3 are inserted and engaged, and the conductive limiting component 6 and the end component 3 contact to form an electrical connection structure, and form a seal on the bottom of the fixed cylinder 5.

[0038] The conductive limiting member 6 is threadedly connected to the threaded groove inside the fixed cylinder 5. The plug 4, under the action of the conductive limiting member 6, inserts and engages with the end piece 3 to form the main conductive path. The conductive limiting member 6 can tighten the plug 4 and end piece 3, and also seal the bottom of the fixed cylinder 5, ensuring the connection between the plug 4 and end piece 3 is in a sealed environment. Simultaneously, the conductive limiting member 6 and end piece 3 form an electrical connection. Then, multiple branch grounding plugs 7 are connected to the bottom of the conductive limiting member 6 to form branch conductive paths. Finally, the grounding rod 1 is connected to the multiple branch grounding plugs 7. Inserted into the ground, the grounding structure is assembled. During the insertion of multiple branch grounding components 7 into the ground, a downward force can be applied to the grounding rod 1 to maintain the stability of the grounding rod 1. The cooperation between the grounding rod 1 and the multiple branch grounding components 7 forms a multi-channel current conduction to the ground, which not only reduces the grounding resistance and improves the discharge capacity, but also forms a radial support structure with the circumferentially arranged branch grounding components 7. This enhances its pull-out resistance and vertical stability, prevents the grounding rod 1 from tilting or falling off due to soil loosening or external forces, and realizes the current dispersion to the ground, avoiding the risk of single-point grounding failure.

[0039] It should be noted that if the threaded structure between the conductive limiting component 6 and the fixed cylinder 5 becomes loose during use, it will cause the plug 4 and the end component 3 to become loose, and the conductive limiting component 6 will also lose contact with the end component 3, causing the branch grounding component 7 to fail to function. Therefore, after the grounding rod 1 and the branch grounding component 7 are inserted into the ground, multiple branch wires 8 on the grounding wire 2 can be connected to the conductive limiting component 6, so that multiple branch wires 8 and multiple branch grounding components 7 form a multi-path backup current grounding structure. When the threaded connection between the conductive limiting component 6 and the fixed cylinder 5 becomes loose or even fails due to vibration or other reasons, that is, the main connection path fails, the current can still be introduced to the ground through this backup path, through the branch wires 8 and the conductive limiting component 6 to the branch grounding component 7, forming a backup conductive path independent of the main connection path, realizing the switching under fault conditions, ensuring the continuity of transformer operation and the safety of personnel and equipment.

[0040] It should be further noted that the grounding wire 2 of the present invention is connected to the grounding terminal on the transformer.

[0041] In this embodiment, the end piece 3 includes an outer shell 31 and an end piece 32. The fixing cylinder 5 is installed at the bottom of the outer shell 31. The end piece 32, which extends into the fixing cylinder 5, is installed inside the outer shell 31. The plug-in 4 is used to plug into and cooperate with the end piece 32. During assembly, the conductive limiting member 6 is threadedly connected to the fixing cylinder 5. The plug-in 4 on the grounding rod 1 is inserted into the end piece 32 to achieve electrical connection. The conductive limiting member 6 can apply an upward pressing force to the plug-in 4 to complete the installation of the plug-in 4 and the end piece 32. The current can be introduced into the ground through the grounding wire 2, the end piece 32, the plug-in 4 and the grounding rod 1.

[0042] It should be noted that the outer casing 31 is made of insulating material.

[0043] In this embodiment, the end head 32 includes an end core 321 and a first conductive ring 322. A loading cavity is provided inside the outer shell 31. The end core 321 is installed in the loading cavity and extends into the fixed cylinder 5. The bottom of the end core 321 is fixedly fitted with the first conductive ring 322 located inside the fixed cylinder 5. An insertion cavity 3211 is provided inside the end core 321. One end of the grounding wire 2 is connected to the end core 321. During assembly, the conductive limiting member 6 is threadedly connected to the fixed cylinder 5. Under the action of the conductive limiting member 6, the plug 4 is inserted and engaged with the insertion cavity 3211 inside the end core 321. After the conductive limiting member 6 is threadedly connected to the fixed cylinder 5, its top end contacts the first conductive ring 322 to achieve electrical connection, which can realize the branch conduction function of the branch grounding member 7.

[0044] In this embodiment, the plug-in 4 includes a conductive core 41 and a conductive round seat 42. The conductive core 41 is installed at the top of the grounding rod 1. The top of the conductive core 41 is connected to a protrusion 411 that is adapted to the insertion cavity 3211. The bottom of the conductive core 41 is fixed with a conductive round seat 42. The bottom of the conductive round seat 42 is fixed with a bushing 421 that is sleeved on the grounding rod 1. The conductive limiting member 6 is sleeved on the conductive core 41 and the conductive round seat 42. During assembly, after the conductive limiting member 6 is threadedly connected to the fixing cylinder 5, the protrusion 411 on the conductive core 41 is inserted into the insertion cavity 3211 in the end core 321.

[0045] It should be noted that in actual use, a slot or threaded hole can be opened in the conductive core 41 (the slot and threaded hole pass through the conductive round seat 42 and the bushing 421). If a slot is opened in the conductive core 41, the top of the grounding rod 1 can be inserted into the slot. If a threaded hole is opened in the conductive core 41, a thread structure can be formed on the outer periphery of the top of the grounding rod 1, and then the top of the grounding rod 1 can be threadedly connected to the threaded hole in the conductive core 41 to complete the installation of the grounding rod 1.

[0046] In this embodiment, the conductive limiting member 6 includes a threaded cylinder 61, which is fitted onto the conductive core 41 and the conductive round seat 42. The outer circumference of the threaded cylinder 61 is integrally formed with external threads, and the threaded cylinder 61 is used to be threadedly connected to the threaded groove in the fixed cylinder 5. The top of the threaded cylinder 61 is fixed with a second conductive ring 62 for contacting the surface of the first conductive ring 322. The bottom of the threaded cylinder 61 is connected to a plurality of circumferentially arranged main female ends 622. Each of the plurality of main female ends 622 and the second conductive ring 62 is connected with a main guide line 621, and a branch insertion member 7 is used to be detachably connected to the main female ends 622. Each of the plurality of main guide lines 621 is connected with an auxiliary docking part 63, and a plurality of branching members 8 are detachably connected to the plurality of auxiliary docking parts 63 respectively.

[0047] During assembly, the threaded cylinder 61 is screwed into the fixed cylinder 5, and the protrusion 411 on the conductive core 41 is inserted into the cavity 3211 in the end core 321. After the threaded cylinder 61 is connected in place, the protrusion 411 on the conductive core 41 and the cavity 3211 of the end core 321 can be tightly fitted to ensure the stability of the main conductive path. During the connection process, the second conductive ring 62 at the top of the threaded cylinder 61 is in surface contact with the first conductive ring 322 to achieve electrical connection. The main female end 622 arranged circumferentially at the bottom is connected to the second conductive ring 62 through the main guide line 621. The branch grounding component 7 is detachably connected to the main female end 622 to form a multi-branch current grounding path, which reduces the grounding resistance and improves the current discharge capacity. At the same time, the auxiliary docking part 63 on the main guide line 621 is detachably connected to the branch component 8 on the grounding wire 2 to form a redundant electrical connection structure. When the main connection path fails, it can ensure that the current can still be conducted to the ground.

[0048] In this embodiment, a sealing ring 64 is fixedly fitted at the bottom of the threaded cylinder 61, and the sealing ring 64 is used to abut against the bottom of the fixed cylinder 5 and seal its interior. When the threaded cylinder 61 is threaded into the fixed cylinder 5, the sealing ring 64 at the bottom of the threaded cylinder 61 will abut against the bottom of the fixed cylinder 5. The sealing ring 64 can fill the gap between the bottom of the fixed cylinder 5 and the threaded cylinder 61 to form a sealed space, effectively preventing rainwater, mud, dust and other external impurities from entering the interior of the fixed cylinder 5, avoiding oxidation and corrosion of the internal conductive components such as the first conductive ring 322, the second conductive ring 62, and the plug 4, extending the service life of the components and ensuring stable conductivity.

[0049] In this embodiment, the auxiliary docking part 63 includes a guide wire 631 and an auxiliary female end 632. Multiple circumferentially arranged auxiliary female ends 632 are installed on the outer periphery of the sealing ring body 64. The ends of the multiple auxiliary female ends 632 are connected to the guide wires 631. The multiple guide wires 631 are respectively connected to multiple main lines 621. Multiple branch wires 8 are respectively used to detachably connect to the multiple auxiliary female ends 632. When the branch grounding insert 7 and the grounding rod 1 are inserted into the ground, the branch wires 8 can be connected to the auxiliary female ends 632. The current of the grounding wire 2 can be conducted to the main line 621 through the branch wires 8, auxiliary female ends 632, and guide wires 631, and then split to each branch grounding insert 7 to form a backup conductive path independent of the main path. This design not only realizes the redundant configuration of multiple grounding paths, but also facilitates the later inspection and replacement of the branch wires 8 or auxiliary docking parts 63 through the detachable connection method, improving the maintenance convenience of the grounding structure.

[0050] In this embodiment, the branch grounding component 7 includes branch wires 71 and grounding parts 72. The top ends of multiple branch wires 71 are all connected to first connectors 711. Multiple first connectors 711 are respectively plugged into multiple main female terminals 622. The bottom ends of multiple branch wires 71 are all fixed with grounding parts 72 for insertion into the ground.

[0051] During assembly, the first connector 711 at the top of the multiple branch conductors 71 is plugged into multiple main female terminals 622 to achieve electrical connection. Then, the grounding part 72 at the bottom of the conductor is inserted into the ground to expand the contact range between the grounding structure and the earth. The multiple branch grounding parts 7 are arranged around the grounding rod 1 in a circumferential manner. After being inserted into the ground, they form a radial grounding network. Compared with a single grounding rod 1, this reduces the grounding resistance and increases the discharge speed of lightning current and fault current. It also prevents the transformer casing from becoming energized or equipment from being damaged due to current accumulation. At the same time, after the branch grounding parts 7 are inserted into the ground, they can provide lateral support to the main grounding rod 1, enhance the pull-out resistance and vertical stability of the overall structure, and effectively resist the tilting and displacement of the grounding rod 1 caused by wind, soil settlement or external impact, ensuring the long-term stable operation of the grounding structure.

[0052] It should be noted that in order to seal the connection between the first connector 711 and the main female end 622, tape can be wrapped around the connection. This will not only ensure the tightness of the connection between the first connector 711 and the main female end 622, but also seal the connection and prevent dust from entering the connection.

[0053] In this embodiment, the grounding part 72 is a grounding rod 721, which is fixed to the bottom end of the branch conductor 71. During installation, the grounding rod 721 can be inserted into the ground and the current can be conducted to the ground through the grounding rod 721.

[0054] It should be noted that in actual use, insulating tape can be wrapped around the connection between the branch wire 71 and the grounding pole 721 to protect the connection.

[0055] In this embodiment, the splitter 8 includes a connecting wire 81 and a second connector 82. Multiple connecting wires 81 are connected to the grounding wire 2. One end of each of the multiple connecting wires 81 is connected to a second connector 82. The multiple second connectors 82 are used to detachably connect to multiple auxiliary female terminals 632.

[0056] If the threaded structure between the threaded cylinder 61 and the fixed cylinder 5 becomes loose during use, the protrusion 411 on the conductive core 41 will loosen in the insertion cavity 3211 inside the end core 321, and the second conductive ring 62 on the threaded cylinder 61 will also detach from the first conductive ring 322 at the bottom of the end core 321, thus affecting the grounding effect of the current on the transformer. Therefore, after the grounding rod 1 and the branch grounding plug 7 are inserted into the ground, the second connectors 82 on the multiple connecting wires 81 can be connected to the multiple auxiliary female terminals 632 respectively to realize the connection of multiple branch wires. The component 8 corresponds one-to-one with multiple auxiliary connecting parts 63 to construct a redundant conductive path. Even if the threaded structure of the screw cylinder 61 and the fixed cylinder 5 loosens during use, the current can be switched to the backup path through the branch component 8. The current is conducted through the connecting line 81, the second connecting head 82, the auxiliary female end 632, the auxiliary line 631, the main line 621, and the main female end 622 to the branch grounding component 7, and finally to the ground, forming a backup conductive path independent of the main connecting path. This realizes the switching under fault conditions and ensures the continuity of transformer operation and the safety of personnel and equipment.

[0057] It should be noted that in actual use, the connection between the second connector 82 and the auxiliary female end 632 is wrapped with tape, which can not only ensure the stability of the connection between the two, but also play a protective role.

[0058] The specific working principle of this invention is as follows:

[0059] When installing the transformer grounding structure, the threaded cylinder 61 is threadedly connected to the fixed cylinder 5. The protrusion 411 at the top of the conductive core 41 on the grounding rod 1 is inserted into the cavity 3211 inside the end core 321, so that the protrusion 411 at the top of the conductive core 41 and the cavity 3211 inside the end core 321 fit tightly. During this process, the second conductive ring 62 at the top of the threaded cylinder 61 and the first conductive ring 322 at the bottom of the end core 321 come into contact with each other to form an electrical connection. The sealing ring 64 at the bottom of the threaded cylinder 61 abuts against the bottom of the fixed cylinder 5 to seal the inside and prevent external factors from corroding the connection. Then the grounding rod 1 is inserted into the ground to achieve the initial assembly.

[0060] Subsequently, the first connectors 711 on the multiple branch conductors 71 are respectively connected to the main female ends 622 at the bottom of the multiple main conductors 621. Then, the grounding rods 721 at the bottom of the multiple branch conductors 71 are inserted into the ground around the grounding rod 1. The multiple branch conductors 71 form a radial support structure, which not only enhances its pull-out resistance and vertical stability, preventing the grounding rod 1 from tilting or falling off due to soil loosening or external force, but also realizes the current dispersion to the ground, avoiding the risk of single-point grounding failure. The current on the transformer can be introduced into the ground through multiple paths through the grounding wire 2, conductive core 41, grounding rod 1, second conductive ring 62, main conductor 621, branch conductors 71 and grounding rod 721.

[0061] Finally, the second connectors 82 on the multiple connecting wires 81 are respectively connected to the multiple auxiliary female terminals 632 to form a redundant electrical connection structure. When the threaded structure between the threaded cylinder 61 and the fixed cylinder 5 becomes loose, that is, when the main connection path fails, the current can be conducted through the connecting wires 81, the second connectors 82, the auxiliary female terminals 632, the auxiliary wires 631, the main wires 621, the main female terminals 622, and the branch wires 71 to the grounding rod 721, and finally to the ground, forming a backup conductive path independent of the main connection path. This realizes the switching under fault conditions and ensures the continuity of transformer operation and the safety of personnel and equipment.

[0062] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A transformer grounding structure, characterized in that, Includes grounding rod (1) and grounding wire (2); One end of the grounding wire (2) is connected to an end piece (3), and a fixing cylinder (5) is installed at the bottom of the end piece (3). A threaded groove is provided inside the fixing cylinder (5). The top end of the grounding rod (1) is connected to a plug-in (4) for inserting and engaging with the end piece (3). A conductive limiting piece (6) for threaded engagement with the fixing cylinder (5) is fitted around the outer periphery of the plug-in (4). The bottom of the conductive limiting member (6) is detachably connected to multiple circumferentially arranged branch grounding members (7), and the grounding wire (2) is connected to multiple branch wires (8) that are detachably connected to the conductive limiting member (6). The multiple branch wires (8) are used to form a multi-way electrical connection structure with the multiple branch grounding members (7). When the conductive limiting component (6) is threadedly connected to the fixed cylinder (5), the plug (4) and the end component (3) are plugged in and engaged, the conductive limiting component (6) and the end component (3) contact each other to form an electrical connection structure, and form a seal on the bottom of the fixed cylinder (5).

2. The transformer grounding structure according to claim 1, characterized in that, The end piece (3) includes an outer shell (31) and an end head (32). The fixing cylinder (5) is installed at the bottom of the outer shell (31). The end head (32) is installed inside the outer shell (31) and the plug (4) is used to plug into the end head (32).

3. A transformer grounding structure according to claim 2, characterized in that, The end head (32) includes an end core (321) and a first conductive ring (322). The outer shell (31) has a loading cavity. The end core (321) is installed in the loading cavity and extends into the fixed cylinder (5). The bottom of the end core (321) is fixedly fitted with the first conductive ring (322) located in the fixed cylinder (5). The end core (321) has an insertion cavity (3211). One end of the grounding wire (2) is connected to the end core (321).

4. A transformer grounding structure according to claim 3, characterized in that, The plug-in (4) includes a conductive core (41) and a conductive round seat (42). The conductive core (41) is installed on the top of the grounding rod (1). The top of the conductive core (41) is connected to a protrusion (411) that is adapted to the insertion cavity (3211). The bottom of the conductive core (41) is fixed with a conductive round seat (42). The bottom of the conductive round seat (42) is fixed with a bushing (421) that is sleeved on the grounding rod (1). The conductive limiting member (6) is sleeved on the conductive core (41) and the conductive round seat (42).

5. A transformer grounding structure according to claim 4, characterized in that, The conductive limiting component (6) includes a threaded cylinder (61), which is fitted onto the conductive core (41) and the conductive round seat (42). The outer circumference of the threaded cylinder (61) is integrally formed with external threads, and the threaded cylinder (61) is used to connect with the threaded groove in the fixed cylinder (5). The top of the threaded cylinder (61) is fixed with a second conductive ring (62) for contacting the surface of the first conductive ring (322). The bottom of the threaded cylinder (61) is connected to multiple circumferentially arranged main female ends (622). Each of the multiple main female ends (622) and the second conductive ring (62) is connected with a main guide line (621), and a branch insertion component (7) is used to detachably connect with the main female ends (622). Each of the multiple main guide lines (621) is connected with an auxiliary docking part (63), and multiple branching components (8) are detachably connected to the multiple auxiliary docking parts (63).

6. A transformer grounding structure according to claim 5, characterized in that, The bottom of the threaded cylinder (61) is fixedly fitted with a sealing ring (64), and the sealing ring (64) is used to abut against the bottom of the fixed cylinder (5) and seal its interior.

7. A transformer grounding structure according to claim 6, characterized in that, The auxiliary docking part (63) includes a guide wire (631) and an auxiliary female end (632). Multiple circumferentially arranged auxiliary female ends (632) are installed on the outer periphery of the sealing ring body (64). The ends of the multiple auxiliary female ends (632) are connected to the guide wire (631). The multiple guide wires (631) are respectively connected to multiple main wires (621). Multiple branch wires (8) are respectively used to detachably connect with the multiple auxiliary female ends (632).

8. A transformer grounding structure according to claim 5, characterized in that, The branch insertion component (7) includes branch conductors (71) and insertion parts (72). The top ends of multiple branch conductors (71) are connected to first connectors (711). Multiple first connectors (711) are respectively inserted into multiple main female terminals (622). The bottom ends of multiple branch conductors (71) are fixed with insertion parts (72) for insertion into the ground.

9. A transformer grounding structure according to claim 8, characterized in that, The grounding part (72) is a grounding rod (721), which is fixed to the bottom end of the branch conductor (71).

10. A transformer grounding structure according to claim 7, characterized in that, The splitter (8) includes a connecting wire (81) and a second connector (82). Multiple connecting wires (81) are connected to the grounding wire (2). One end of each of the multiple connecting wires (81) is connected to a second connector (82). The multiple second connectors (82) are used to detachably connect to multiple auxiliary female terminals (632).

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