Grounding cable protection device for transformer substation

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By designing a grounding cable protection device for substations, the contact area between the grounding end and the soil is increased by using the lifting rod and the conductive cone, and the soil structure is stabilized through multiple conductive shafts, the problem of unstable connection between the grounding end of the traditional grounding cable and the soil contact surface is solved, achieving a more stable grounding connection and higher grounding cable reliability.

CN222620399UActive Publication Date: 2025-03-14CHINESE PEOPLES ARMED POLICE FORCE JIANGXI HYDRO POWER NO 2 GENERAL GRP

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Patent Information

Application Number: CN202420431753.7
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-03-06
Publication Date: 2025-03-14
Estimated Expiration: 2034-03-06

AI Technical Summary

Technical Problem

When the grounding end of traditional substations is connected to the soil for a long time, it is easy to cause unstable connection between the grounding end and the soil contact surface, resulting in short circuit damage.

Method used

A grounding cable protection device for substations is designed. The lifting rod is gradually squeezed and moved downward through the connecting shaft, driving the conductive cone to extend downward, increasing the contact area between the grounding end and the soil, and inserting it into the soil from different directions through multiple conductive shafts to stabilize the soil structure.

Benefits of technology

It effectively avoids the short circuit problem caused by insufficient contact between the ground end and the soil, enhances the stable connection between the grounding cable and the soil, avoids soil collapse and hollowing, and ultimately improves the normal grounding conductive work of the grounding cable.

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Abstract

The utility model relates to the technical field of grounding protection for a transformer station, and especially relates to a grounding cable protection device for a transformer station. According to the technical scheme, the box comprises a box body and two box doors, and the two box doors are rotationally connected to the two ends of one side of the box body respectively; the first junction box is fixedly arranged at the top of the box body and is connected with an external cable; the supporting plate is movably mounted in the box body; and the second junction box is mounted at the top of the supporting plate and is connected with the first junction box. According to the utility model, the conductive cone and the plurality of conductive shafts in the protection mechanism extend out of the grounding pole and are inserted into surrounding soil, the contact area between the wiring end and the soil is increased, and the plurality of conductive shafts are respectively inserted into the soil from different directions, so that the soil structure can be stabilized, and the soil stability can be enhanced; the soil collapse and hollowness are avoided, and finally the stable connection effect of the grounding end of the grounding cable and the soil contact surface is improved.

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Description

Technical Field

[0001] The utility model relates to the technical field of grounding protection for transformer substations, in particular to a grounding cable protection device for transformer substations. Background Art

[0002] When constructing and installing a substation, a grounding wire needs to be installed to ensure the safety of current transportation and avoid leakage problems. When grounding, the grounding cable generally uses a conductive metal body, which is connected to the grounding cable and then connected to the ground after safety treatment, to guide the unexpected current into the ground to avoid electric shock accidents.

[0003] When the grounding cable for traditional substations is connected to the soil at the grounding end for a long time, the connection between the grounding end and the soil is prone to instability. Since the soil in some areas is soft and moist, the soil is prone to collapse or hollowing, resulting in a reduction in the contact area between the soil and the grounding end, which in turn causes a short circuit, damages the cable, and ultimately affects the normal grounding and conductive work of the power cable. Summary of the invention

[0004] The purpose of the utility model is to propose a grounding cable protection device for a substation to address the problem that when the cable grounding end is connected to the soil for a long time in the background technology, the connection between the grounding end and the soil contact surface is unstable, which may cause cable short circuit damage.

[0005] The technical solution of the utility model: a grounding cable protection device for a substation, comprising a box body and two box doors, the two box doors are rotatably connected to the two ends of one side of the box body; a first junction box, the first junction box is fixedly installed on the top of the box body and connected to an external cable; a support plate, the support plate is movably installed inside the box body; a second junction box, the second junction box is installed on the top of the support plate and connected to the first junction box; a plurality of protection mechanisms, a plurality of the protection mechanisms are installed at the bottom of the box body; a connecting shaft, a plurality of the connecting shafts are installed at the bottom of the support plate, and the two ends are respectively connected to the second junction box and the protection mechanism.

[0006] Optionally, the protection mechanism includes a connecting groove and an installation cavity, the connecting groove is plugged into the connecting shaft, a lifting rod is connected through the inside of the connecting groove, the bottom end of the lifting rod extends into the installation cavity, the lifting rod is located in the installation cavity and is rotatably connected to a plurality of connecting blocks on a rod body, and the ends of the plurality of connecting blocks away from the lifting rod are rotatably connected to a conductive shaft, the plurality of conductive shafts are respectively connected through the grounding column, and an end of the connecting block close to the lifting rod is higher than an end close to the conductive shaft.

[0007] Optionally, the protection mechanism further includes a conductive cone, which is fixedly connected to the bottom end of the lifting rod, and a through groove is formed at the bottom end of the installation cavity, and the conductive cone is slidably connected in the through groove.

[0008] Optionally, the protection mechanism also includes a baffle, which is sleeved and fixed on the lifting rod near the bottom end, and a plurality of springs are fixedly connected between the lower surface of the baffle and the bottom of the installation cavity. Through the above arrangement, on the one hand, it can prevent small animals and soil in the soil from being accidentally brought into the installation cavity when the conductive cone moves up and down, and on the other hand, in conjunction with the spring, it can also assist in resetting the relevant structures in the protection mechanism.

[0009] Optionally, a plurality of groups of bristles are arranged on the outer contour of the baffle.

[0010] Optionally, a mounting ring is sleeved and fixed at the top of the grounding column, the mounting ring and the box are installed at the bottom of the inner wall of the box, and two handles for easy grasping are provided on the top of the mounting ring.

[0011] Optionally, a motor and two limit rods are installed at the bottom of the box, the two limit rods are respectively located on both sides of the motor and penetrate the connecting support plate, and a threaded rod is fixedly installed at the output end of the motor, and the threaded rod is threadedly connected to the support plate.

[0012] Optionally, four supporting shafts are fixedly connected to the top of the box body, and a top cover is commonly installed on the top ends of the four supporting shafts.

[0013] Compared with the prior art, the utility model has the following beneficial technical effects:

[0014] The connecting shaft connected to the cable gradually squeezes the lifting rod to move downward, thereby driving the conductive cone to extend downward and contact the deep layer of the soil, thereby further increasing the contact area between the grounding terminal and the soil, avoiding insufficient contact between the grounding terminal and the soil to cause a short circuit, and causing multiple conductive shafts on the grounding column to extend out of the grounding column and insert into the surrounding soil to increase the contact area between the terminal and the soil. At the same time, since multiple conductive shafts are inserted into the soil from different directions, the soil structure can also be stabilized, the soil stability can be enhanced, and the soil collapse and hollowness can be avoided, ultimately achieving the effect of enhancing the stable connection between the grounding terminal of the grounding cable and the soil contact surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Provide a schematic diagram of the structure of the utility model;

[0016] Figure 2 A schematic diagram of the structure of the protection mechanism of the utility model before and after it is deployed is given;

[0017] Figure 3A schematic cross-sectional view of the structure of the protection mechanism of the utility model is given;

[0018] Figure 4 A schematic structural diagram of the motor, threaded rod and support plate of the utility model is given.

[0019] Figure numerals: 1. box body; 2. box door; 3. first junction box; 4. support plate; 5. limit rod; 6. threaded rod; 7. motor; 8. protection mechanism; 9. connecting shaft; 10. grounding column; 11. mounting ring; 12. lifting rod; 13. connecting block; 14. conductive shaft; 15. baffle; 16. spring; 17. conductive cone; 18. connecting groove; 19. mounting cavity; 20. bristles; 21. top cover; 22. second junction box. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments. Example

[0021] like Figure 1-4 As shown, the grounding cable protection device for a substation proposed by the utility model includes a box body 1, and also includes two box doors 2, the two box doors 2 are rotatably connected to the two ends of one side of the box body 1; a first junction box 3, the first junction box 3 is fixedly installed on the top of the box body 1, and is connected to an external cable; a support plate 4, the support plate 4 is movably installed inside the box body 1; a second junction box 22, the second junction box 22 is installed on the top of the support plate 4, and is connected to the first junction box 3; a plurality of protection mechanisms 8, a plurality of protection mechanisms 8 are installed at the bottom of the box body 1; a connecting shaft 9, the connecting shaft 9 is installed at the bottom of the support plate 4, and the two ends are respectively connected to the second junction box 22 and the protection mechanism 8.

[0022] Furthermore, the protection mechanism 8 includes a connecting groove 18 and a mounting cavity 19, the connecting groove 18 is plugged with the connecting shaft 9, the inner part of the connecting groove 18 is connected with a lifting rod 12, the bottom end of the lifting rod 12 extends into the mounting cavity 19, the lifting rod 12 is located in the mounting cavity 19 and is rotatably connected with a plurality of connecting blocks 13 on the rod body thereof, the ends of the plurality of connecting blocks 13 away from the lifting rod 12 are all rotatably connected with a conductive shaft 14, the plurality of conductive shafts 14 are respectively connected to the grounding column 10, the end of the connecting block 13 close to the lifting rod 12 is higher than the end close to the conductive shaft 14, through the above arrangement, when the connecting shaft 9 is plugged into the connecting groove 18, When the cable is connected to the grounding terminal in the connection groove 18, the gradually descending connection shaft 9 will squeeze the lifting rod 12 to move downward. At this time, the descent of the lifting rod 12 will drive one end of the multiple connection blocks 13 to move downward, and push the other end to drive the conductive shaft 14 to extend out of the grounding column 10 and insert into the surrounding soil, thereby increasing the contact area between the terminal and the soil. At the same time, since the multiple conductive shafts 14 are inserted into the soil from different directions, the soil structure can also be stabilized, the soil stability can be enhanced, and the soil can be prevented from collapsing and becoming hollow, thereby ultimately achieving a stable connection effect between the grounding terminal of the grounding cable and the soil contact surface.

[0023] Furthermore, the protection mechanism 8 also includes a conductive cone 17, which is fixedly connected to the bottom end of the lifting rod 12. A through groove is provided at the bottom end of the mounting cavity 19, and the conductive cone 17 is slidably connected in the through groove. Through the above arrangement, when the connecting shaft 9 squeezes the lifting rod 12 to descend, it will also synchronously drive the conductive cone 17 to extend downward and contact the deep layer of the soil, thereby further increasing the contact area between the grounding terminal and the soil, avoiding insufficient contact between the grounding terminal and the soil, and causing a short circuit.

[0024] Among them, the protection mechanism 8 also includes a baffle 15, which is sleeved and fixed on the lifting rod 12 near the bottom end. A plurality of springs 16 are fixedly connected between the lower surface of the baffle 15 and the bottom of the installation cavity 19. Through the above arrangement, on the one hand, it can prevent small animals and soil in the soil from being accidentally brought into the installation cavity 19 when the conductive cone 17 moves up and down. On the other hand, in conjunction with the spring 16, it can also assist in resetting the relevant structures in the protection mechanism 8.

[0025] In addition, a plurality of groups of bristles 20 are arranged on the outer contour of the baffle 15, so as to further prevent foreign matter from entering the installation cavity 19 without affecting the up and down movement of the baffle 15, thereby improving the safety of the device.

[0026] Among them, a mounting ring 11 is sleeved and fixed at the top of the grounding column 10, and the mounting ring 11 and the box body 1 are installed at the bottom of the inner wall of the box body 1. Two handles for easy grasping are provided on the top of the mounting ring 11. Through the above arrangement, on the one hand, the connection between the protection mechanism 8 and the box body 1 can be stabilized, and on the other hand, it can be convenient for maintenance personnel to remove the protection mechanism 8.

[0027] Furthermore, a motor 7 and two limit rods 5 are installed at the bottom of the box body 1. The two limit rods 5 are respectively located on both sides of the motor 7 and penetrate the support plate 4. A threaded rod 6 is fixedly installed on the output end of the motor 7. The threaded rod 6 is threadedly connected to the support plate 4. Through the above arrangement, after the motor 7 is started, its output shaft can drive the threaded rod 6 to rotate, thereby controlling the support plate 4 to perform lifting and lowering movements, and the connection relationship between the two limit rods 5 and the support plate 4 can improve the stability of the support plate 4 during lifting and lowering.

[0028] Furthermore, four support shafts are fixedly connected to the top of the box body 1, and a top cover 21 is commonly installed on the top ends of the four support shafts. Through the above arrangement, the top cover 21 can shield the box body 1 from wind and rain, reduce the impact of external weather on the first junction box 3, and extend the service life of the first junction box 3.

[0029] Working principle: When the connecting shaft 9 is inserted into the connecting groove 18 and the cable is connected to the grounding terminal, the gradually descending connecting shaft 9 will squeeze the lifting rod 12 to move downward. At this time, the descent of the lifting rod 12 will drive one end of the multiple connecting blocks 13 to move downward, and push the other end to drive the conductive shaft 14 to extend out of the grounding column 10 and insert into the surrounding soil, thereby increasing the contact area between the terminal and the soil. At the same time, since the multiple conductive shafts 14 are inserted into the soil from different directions, the soil structure can be stabilized, the soil stability can be enhanced, and the soil can be prevented from collapsing and becoming hollow, thereby ultimately achieving a stable connection effect between the grounding terminal of the grounding cable and the contact surface with the soil.

[0030] In addition, when the connecting shaft 9 squeezes the lifting rod 12 to descend, it will also synchronously drive the conductive cone 17 to extend downward and contact the deep layer of the soil, thereby further increasing the contact area between the grounding terminal and the soil, and avoiding insufficient contact between the grounding terminal and the soil, which may cause a short circuit.

[0031] Among them, after the motor 7 is started, its output shaft can drive the threaded rod 6 to rotate, thereby controlling the lifting movement of the support plate 4, and the connection relationship between the two limit rods 5 and the support plate 4 can improve the stability of the support plate 4 during lifting, which is convenient for maintenance personnel to install and maintain.

[0032] The above-mentioned specific embodiments are only several optional embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A grounding cable protection device for a substation, comprising a box (1), characterized in that: Also includes: Two box doors (2), the two box doors (2) are rotatably connected to two ends of one side of the box body (1); A first junction box (3), the first junction box (3) being fixedly mounted on the top of the box (1) and connected to an external cable, and a support plate (4) being movably mounted inside the box (1); A second junction box (22) is installed on the top of the support plate (4), and the second junction box (22) is connected to the first junction box (3); A protective mechanism (8) installed at the bottom of the box (1); The connecting shaft (9) is mounted on the bottom of the supporting plate (4), and its two ends are respectively connected to the second junction box (22) and the protection mechanism (8).

2. The grounding cable protection device for substation according to claim 1, characterized in that: The protection mechanism (8) comprises a connection groove (18) and a mounting cavity (19); the connection groove (18) is plugged into the connection shaft (9); a lifting rod (12) is connected through the connection groove (18); the bottom end of the lifting rod (12) extends into the mounting cavity (19); a plurality of connection blocks (13) are rotatably connected to a rod body of the lifting rod (12) located in the mounting cavity (19); the ends of the plurality of connection blocks (13) away from the lifting rod (12) are all rotatably connected to a conductive shaft (14); the plurality of conductive shafts (14) are respectively connected through the grounding column (10); and an end of the connection block (13) close to the lifting rod (12) is higher than an end close to the conductive shaft (14).

3. The grounding cable protection device for substation according to claim 2, characterized in that: The protection mechanism (8) further comprises a conductive cone (17), wherein the conductive cone (17) is fixedly connected to the bottom end of the lifting rod (12), a through slot is formed at the bottom end of the installation cavity (19), and the conductive cone (17) is slidably connected in the through slot.

4. The grounding cable protection device for substation according to claim 2, characterized in that: The protection mechanism (8) further comprises a baffle (15), wherein the baffle (15) is sleeved and fixed on the lifting rod (12) near the bottom end, and a plurality of springs (16) are fixedly connected between the lower surface of the baffle (15) and the bottom of the installation cavity (19).

5. The grounding cable protection device for substation according to claim 4, characterized in that: A plurality of groups of brush bristles (20) are arranged on the outer contour of the baffle (15).

6. The grounding cable protection device for substation according to claim 2, characterized in that: A mounting ring (11) is sleeved and fixed at the top end of the grounding column (10); the mounting ring (11) and the box body (1) are mounted at the bottom of the inner wall of the box body (1); and two handles for easy gripping are provided at the top of the mounting ring (11).

7. The grounding cable protection device for a substation according to claim 1, characterized in that: A motor (7) and two limit rods (5) are installed at the bottom of the box body (1). The two limit rods (5) are respectively located on both sides of the motor (7) and penetrate the support plate (4). A threaded rod (6) is fixedly installed at the output end of the motor (7), and the threaded rod (6) is threadedly connected to the support plate (4).

8. The grounding cable protection device for substation according to claim 1, characterized in that: Four support shafts are fixedly connected to the top of the box body (1), and a top cover (21) is commonly installed on the top ends of the four support shafts.