Temporary fast grounding device for substation maintenance

Abstract

This invention relates to a temporary fast grounding device for substation maintenance, belonging to the field of grounding equipment technology. It includes a frame, with a movable platform slidably mounted inside the frame via a lifting mechanism. A drill rod is mounted on the movable platform, with a drill head at its lower end. The drill rod includes a core column and a cylinder. The core column is fixedly mounted on the movable platform, and the cylinder is rotatably sleeved around the outside of the core column. The area between the core column and the cylinder is separated into a material chamber by two upper and lower partition rings. The material chamber is connected to the outside of the cylinder through a material hole. Multiple vertical concealed grooves are provided on the outer wall of the cylinder, with an inlet / outlet at the lower end of each groove. A rod is mounted inside each groove, with a conductive cone fixedly mounted at its lower end and a piston block fixedly mounted at its upper end. The piston block is slidably mounted inside the groove. The space inside the groove above the piston block is connected to an air pump. This invention solves the problems of limited applicability and poor grounding effect of current grounding technologies used for power outage equipment during maintenance.

Description

Technical Field

[0001] This invention belongs to the field of grounding equipment technology, specifically relating to a temporary fast grounding device for substation maintenance. Background Technology

[0002] With the continuous expansion of the power system and the gradual increase in voltage levels, the frequency and complexity of substation equipment maintenance have significantly increased. To ensure the safety of personnel during maintenance, reliable grounding of de-energized equipment is crucial. This effectively eliminates residual charge and prevents the risk of electric shock caused by accidental energization or induced current.

[0003] However, existing grounding technologies primarily rely on workers manually connecting the grounding wire to pre-buried grounding stakes, grounding copper pillars, and other grounding structures using bolts. This traditional grounding method has several problems:

[0004] First, its applicability is limited. It requires a pre-installed grounding structure on site. In areas without such a structure, temporary and rapid grounding work cannot be carried out, making it difficult to meet the complex and ever-changing actual maintenance needs.

[0005] Secondly, the grounding effect is poor. There are many gaps between the grounding structure and the underground soil, which leads to high grounding impedance and makes it easy for poor contact to occur. This affects the stability and reliability of the grounding system and fails to provide sufficient safety for workers.

[0006] In practical applications, technicians in related fields have made numerous attempts to address the problems existing in current grounding technologies, but all have faced significant difficulties. For example, to solve the problem of limited applicability, it is necessary to consider quickly constructing a reliable grounding connection in places where there is no pre-buried grounding structure. However, how to achieve rapid and convenient installation while ensuring grounding effectiveness has become a major challenge. Traditional methods rely on manual bolt tightening, which is cumbersome and time-consuming, making it difficult to meet the needs of temporary rapid grounding.

[0007] To address the issue of poor grounding performance, reducing the gap between the grounding structure and the soil to decrease grounding impedance is crucial. However, the physical properties of soil are complex and varied, with significant differences in soil texture, moisture, and other conditions at different regions and depths. Finding a universal method or material to effectively fill the gaps and reduce impedance while ensuring good contact with the soil and long-term stability presents an extremely high technical challenge.

[0008] Currently, research literature on power grounding technology has mentioned the shortcomings of traditional grounding methods. For example, the "Power System Grounding Technology Handbook" (published in 2023) points out that relying on pre-buried grounding structures restricts temporary operations, gaps between the grounding structure and the soil cause high impedance problems, and poor contact leads to reliability risks. "Discussion on Grounding Methods for Metal Sheaths of High-Voltage Single-Core Cables" (published in 2015) mentions that traditional bolt-fastening connections are difficult to deploy in complex environments, manual operation is time-consuming, and it is difficult to adapt to emergency maintenance scenarios. After long-term use, loosening can easily lead to increased contact resistance, and there is a lack of universal solutions to the impact of soil condition differences on grounding effectiveness. These documents reflect the deficiencies of existing grounding technologies in meeting the needs of temporary rapid grounding and improving grounding effectiveness. Therefore, this application proposes a temporary rapid grounding device for substation maintenance to solve the above-mentioned problems. Summary of the Invention

[0009] This invention overcomes the shortcomings of existing technologies and proposes a temporary fast grounding device for substation maintenance; it solves the problems of limited applicability and poor grounding effect of current grounding technologies for power outage equipment during maintenance.

[0010] To achieve the above objectives, the present invention is implemented through the following technical solution.

[0011] A temporary fast grounding device for substation maintenance includes a frame. Inside the frame, a movable platform is slidably mounted via a lifting mechanism. A drill rod is mounted on the movable platform, with a drill head at its lower end. The drill rod includes a core column and a cylinder. The core column is fixedly mounted on the movable platform, and the cylinder is rotatably sleeved around the outside of the core column. The area between the core column and the cylinder is separated into a material chamber by two upper and lower partition rings. The material chamber is connected to the outside of the cylinder through a material hole. Multiple vertical recessed grooves are provided on the outer wall of the cylinder, with an inlet and outlet at the lower end of each groove. Inside each groove, a rod is mounted, with a conductive cone fixedly mounted at the lower end and a piston block fixedly mounted at the upper end. The piston block is slidably mounted inside the groove. The space inside the groove above the piston block is connected to an air pump.

[0012] Furthermore, the frame includes an upper horizontal plate, two symmetrical vertical plates, and two symmetrical lower horizontal plates. The left and right ends of the upper horizontal plate are fixedly connected to the upper ends of the two vertical plates, and the ends of the two lower horizontal plates that are close to each other are fixedly connected to the lower ends of the two vertical plates that are far from each other. Multiple casters are provided at the lower ends of the two lower horizontal plates.

[0013] Furthermore, the lifting mechanism includes a lifting motor, a threaded rod, and a fixed frame; two L-shaped fixed frames symmetrically arranged inside the frame are fixedly installed, each fixed frame including a vertical section and a horizontal section. The upper end of the vertical section is fixedly connected to the lower end of the upper horizontal plate of the frame, one end of the horizontal section is fixedly connected to the lower end of the vertical section, and the other end of the horizontal section is fixedly connected to the inner side of the vertical plate on the same side; a vertical threaded rod is rotatably installed inside each fixed frame, and the lower end of the threaded rod is rotatably connected to the horizontal section of the fixed frame; two symmetrical lifting motors are fixedly installed on the upper surface of the upper horizontal plate of the frame, and the output shafts of the two lifting motors pass vertically downward through the upper horizontal plate of the frame and are fixedly connected to the upper ends of the two threaded rods respectively; the two ends of the moving platform are screwed to the outside of the two threaded rods respectively, and the moving platform is slidably sleeved on the outside of the vertical sections of the two fixed frames.

[0014] Furthermore, the cylinder is rotatably mounted on the outside of the core column via two partition rings; a fixing ring is fixedly mounted inside the upper opening of the cylinder, and the fixing ring is rotatably sleeved on the outside of the core column. The fixing ring, the upper partition ring, the outer wall of the core column, and the inner wall of the cylinder form an annular air guide chamber; the upper end of the core column is fixedly inserted into the middle inner side of the moving platform, and the upper end of the core column extends to the upper outer side of the moving platform; an air inlet channel and a material feeding channel are provided inside the upper end face of the core column. The inlet end of both the air inlet channel and the material feeding channel is located at the upper end of the core column, the outlet end of the air inlet channel is connected to the inside of the air guide chamber, and the outlet end of the material feeding channel is connected to the inside of the material feeding chamber.

[0015] Furthermore, a material bin and a feeding pump are fixedly installed on the frame. The material bin contains conductive liquid. The inlet of the feeding pump is connected to the inside of the material bin through a feed pipe, and the outlet of the feeding pump is connected to one end of the inlet of the feeding channel through a discharge pipe. The aforementioned air pump is fixedly installed on the frame. An air inlet pipe is provided at the outlet of the air pump, and one end of the air inlet pipe is connected to one end of the inlet of the air inlet channel.

[0016] Furthermore, a driven gear is fixedly installed on the outside of the upper opening of the cylinder, and the driven gear is sleeved on the outside of the core column. A rotary motor is fixedly installed at the lower end of the moving table, and a driving gear is fixedly installed on the output shaft of the rotary motor. The driving gear meshes with the driven gear.

[0017] Furthermore, multiple concealed grooves are arranged in a circular array on the outside of the cylinder. Each concealed groove consists of an installation groove and a side plate. The side plate is fixedly installed at the outer opening of the installation groove, and the inlet and outlet of the concealed groove are located below the side plate. A conductive sheet is fixedly installed on the inner wall of the side plate, and the conductive sheet is electrically connected to the external grounding wire. The piston block maintains sliding contact with the inner wall of the side plate, the conductive sheet, and the inner wall of the installation groove. The installation groove includes a straight groove and an arc groove. The straight groove is vertical, and the upper end of the arc groove is connected to the lower end of the straight groove. The lower end of the arc groove extends away from the axis of the cylinder and is connected to the outer wall of the cylinder. The lower opening of the arc groove constitutes the inlet and outlet of the concealed groove. A protrusion is fixedly installed at the connection between the straight groove and the arc groove. A sealing plate is rotatably installed at the lower opening of the arc groove, and the lower end of the sealing plate is rotatably connected to the lower opening of the arc groove. An elastic body is fixedly installed inside the lower opening of the arc groove, and the end of the elastic body is fixedly connected to the sealing plate.

[0018] Furthermore, the rod is a vertically arranged tubular structure made of a flexible material; the piston block is slidably disposed inside the straight groove of the mounting slot; a wire is disposed inside the rod, the wire being connected to the conductive cone and the piston block, the piston block being made of a conductive material; an air inlet is disposed inside the piston block, the air inlet being connected to the inside of the rod; an air inlet is disposed between the air guide chamber and the hidden groove space above each piston block.

[0019] Furthermore, the drill bit includes a main drill body, an extension section, a secondary drill body, a guide plate, a fixed gear, and an actuating gear. The main drill body includes a cylindrical section and a conical section. The cylindrical section is fixedly disposed at the lower end of the cylinder, and the conical section is fixedly disposed at the lower end of the cylindrical section. Three extension sections arranged in a circular array are fixedly disposed on the outer side of the cylindrical section of the main drill body. The extension sections are hollow structures, and the internal space of the extension sections is connected to the internal space of the cylindrical section. A vertical connecting shaft is rotatably disposed on the inner side of each extension section. The lower end of the connecting shaft extends to the outside of the extension section. A secondary drill body is fixedly disposed at the lower end of the connecting shaft. The secondary drill body is a conical structure, and multiple fragments are fixedly disposed on the conical surface of the secondary drill body. The lower end of the core column extends into the cylindrical section of the main drill body. A fixed gear is fixedly disposed at the lower end of the core column. An actuating gear is fixedly disposed at the upper end of each connecting shaft. All actuating gears mesh with the fixed gears.

[0020] Furthermore, a guide plate is fixedly installed on the conical surface of the conical section, with one inner end of the guide plate extending to the sharp corner of the conical surface and the other outer end extending to the outer edge of the conical surface.

[0021] The beneficial effects of this invention compared to the prior art are as follows:

[0022] From a structural analysis perspective, by employing drilling, filling with conductive fluid, and extending several conductive cones in all directions, the radiation range of the grounding device underground can be increased, facilitating large-area current diffusion, improving grounding effectiveness and safety. Furthermore, the conductive fluid reduces drilling difficulty and fills voids in the soil, thereby lowering soil impedance and improving soil conductivity. This method also allows for rapid formation of a grounding structure, conveniently meeting temporary and rapid grounding needs. Actual simulations and theoretical reasoning demonstrate that the reduced grounding impedance provides greater safety for workers, avoiding the risk of electric shock due to poor grounding and ensuring the safe and efficient conduct of substation maintenance work. Attached Figure Description

[0023] The present invention will now be described in further detail with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of the invention. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the overall structure of the invention. Figure 2 ;

[0026] Figure 3 This is a schematic diagram showing the connection between the drill pipe and the drill head;

[0027] Figure 4 This is a structural diagram of the drill pipe section;

[0028] Figure 5 This is a three-dimensional schematic diagram of the drill pipe section after it has been cut open;

[0029] Figure 6 This is a three-dimensional schematic diagram of the cylinder after it has been cut open;

[0030] Figure 7 This is a schematic diagram of the hidden groove structure;

[0031] Figure 8 yes Figure 7 A magnified view of a portion of point A in the middle;

[0032] Figure 9 This is a schematic diagram of the core column and two separating rings after being cut apart;

[0033] Figure 10 This is a schematic diagram of the drill bit structure;

[0034] Figure 11 This is a schematic diagram of the drill bit structure after being cut through the main drill body and extension section;

[0035] Among them, 100 is the drill rod part, 101 is the cylinder, 102 is the partition ring, 103 is the material chamber, 104 is the material hole, 105 is the rod body, 106 is the conductive cone, 107 is the side plate body, 108 is the mounting groove, 109 is the straight groove, 110 is the arc groove, 111 is the air guide chamber, 112 is the air guide hole, 113 is the piston block, 114 is the air filling hole, 115 is the protrusion, 116 is the sealing plate, 117 is the elastic body, 118 is the core column, 119 is the air inlet channel, 120 is the conductive sheet, 121 is the feeding channel, and 122 is the fixing ring;

[0036] 200 is the drill head, 201 is the main drill body, 202 is the extension, 203 is the auxiliary drill body, 204 is the guide plate, 205 is the actuating gear, and 206 is the fixed gear.

[0037] 300 is the frame, 301 is the moving platform, 302 is the threaded rod, 303 is the lifting motor, 304 is the rotating motor, 305 is the driving gear, 306 is the driven gear, 307 is the air pump, 308 is the material box, 309 is the material conveying pump, and 310 is the fixed frame. Detailed Implementation

[0038] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of this invention are described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0039] like Figure 1 As shown in Figure 11, this invention provides a temporary fast grounding device for substation maintenance, including a frame 300. A movable platform 301 is slidably mounted inside the frame 300 via a lifting mechanism. A drill rod portion 100 is mounted on the movable platform 301, with a drill head 200 at its lower end. The drill rod portion 100 includes a core post 118 and a cylinder 101. The core post 118 is fixedly mounted on the movable platform 301, and the cylinder 101 is rotatably sleeved around the outside of the core post 118. The area between the core post 118 and the cylinder 101... A material chamber 103 is separated by two upper and lower partition rings 102. The material chamber 103 is connected to the outside of the cylinder 101 through a material hole 104. Multiple vertical hidden grooves are provided on the outer wall of the cylinder 101. The lower end of the hidden groove is provided with an inlet and outlet. A rod 105 is provided inside the hidden groove. A conductive cone 106 is fixedly provided at the lower end of the rod 105. A piston block 113 is fixedly provided at the upper end of the rod 105. The piston block 113 is slidably provided inside the hidden groove. The space inside the hidden groove above the piston block 113 is connected to the air pump 307.

[0040] The frame 300 includes an upper horizontal plate, two symmetrical vertical plates, and two symmetrical lower horizontal plates. The left and right ends of the upper horizontal plate are fixedly connected to the upper ends of the two vertical plates, respectively. The ends of the two lower horizontal plates that are close to each other are fixedly connected to the lower ends of the two vertical plates that are furthest from each other. Multiple casters are provided at the lower ends of the two lower horizontal plates, allowing the entire device to move.

[0041] The lifting mechanism includes a lifting motor 303, a threaded rod 302, and a fixing frame 310. Two L-shaped fixing frames 310, symmetrically arranged on both sides, are fixedly installed inside the frame 300. Each fixing frame 310 includes a vertical section and a horizontal section. The upper end of the vertical section is fixedly connected to the lower end of the upper horizontal plate of the frame 300. One end of the horizontal section is fixedly connected to the lower end of the vertical section, and the other end of the horizontal section is fixedly connected to the inner side of the vertical plate on the same side. A vertical threaded rod 302 is rotatably installed inside each fixing frame 310, with its lower end rotatably connected to the horizontal section of the fixing frame 310. Two symmetrically arranged lifting motors 303 are fixedly installed on the upper surface of the upper horizontal plate of the frame 300. The output shafts of the two lifting motors 303 pass vertically downwards through the upper horizontal plate of the frame 300 and are fixedly connected to the upper ends of the two threaded rods 302, respectively.

[0042] The movable platform 301 is kept horizontal, and its two ends are respectively screwed to the outside of two threaded rods 302. At the same time, the movable platform 301 is slidably sleeved on the outside of the vertical section of two fixed frames 310.

[0043] Two lifting motors 303 drive two threaded rods 302 to rotate respectively. Since the moving platform 301 is screwed to the two threaded rods 302, the moving platform 301 slides along the vertical section of the fixed frame 310, thereby realizing the lifting of the moving platform 301.

[0044] The core column 118 is a vertically arranged cylindrical rod structure, the cylinder 101 is a cylindrical structure with openings at both the top and bottom, and the partition ring 102 is a horizontally arranged annular structure. The cylinder 101 is rotatably mounted on the outside of the core column 118 via two partition rings 102. A circular fixing ring 122 is fixedly installed inside the upper opening of the cylinder 101. The fixing ring 122 is rotatably sleeved on the outside of the core column 118. The fixing ring 122, the upper partition ring 102, the outer wall of the core column 118, and the inner wall of the cylinder 101 form an annular air guiding chamber 111.

[0045] The upper end of the core column 118 is fixedly inserted into the inner side of the middle of the moving platform 301, and the upper end of the core column 118 extends to the outer side of the upper end of the moving platform 301. An L-shaped air inlet channel 119 and an L-shaped feed channel 121 are provided inside the upper end face of the core column 118. The inlet end of the air inlet channel 119 and the feed channel 121 are both located at the upper end of the core column 118. The outlet end of the air inlet channel 119 is connected to the inside of the air guide chamber 111, and the outlet end of the feed channel 121 is connected to the inside of the material chamber 103.

[0046] Multiple material holes 104 with internal and external communication are provided on the side wall of the cylinder 101. The opening of the outer end of the material hole 104 is inclined upward to avoid soil from entering the material hole 104 and blocking it during drilling. The inner end of the material hole 104 is connected to the material chamber 103.

[0047] A material tank 308 and a feed pump 309 are fixedly installed on the upper horizontal plate of the frame 300. The material tank 308 contains conductive liquid. The inlet of the feed pump 309 is connected to the inside of the material tank 308 through a feed pipe, and the outlet of the feed pump 309 is connected to one end of the inlet of the feed channel 121 through a discharge pipe. The feed pump 309 pumps the conductive liquid out of the material tank 308, and after passing through the discharge pipe and the feed channel 121, it is fed into the material chamber 103. The conductive liquid can be a fluid such as brine or conductive gel.

[0048] The air pump 307 is fixedly installed on the upper end of the horizontal plate on the upper side of the frame 300. An air inlet pipe is provided at the outlet of the air pump 307, and one end of the air inlet pipe is connected to one end of the inlet of the air inlet channel 119. The air pump 307 can inject high-pressure gas into the air guide chamber 111 through the air inlet pipe and the air inlet channel 119, and can also extract the air inside the air guide chamber 111 through the air inlet channel 119 and the air inlet pipe, thereby drawing the air inside the air guide chamber 111 to a negative pressure state.

[0049] A driven gear 306 is fixedly installed on the outer side of the upper opening of the cylinder 101. The driven gear 306 is sleeved on the outer side of the core column 118. A rotary motor 304 is fixedly installed at the lower end of the moving table 301. A driving gear 305 is fixedly installed on the output shaft of the rotary motor 304, and the driving gear 305 meshes with the driven gear 306. The rotary motor 304 drives the driving gear 305 to rotate, the driving gear 305 drives the driven gear 306 to rotate, and the driven gear 306 drives the cylinder 101 to rotate outside the core column 118. The cylinder 101 drives the drill head 200 at the lower end to rotate.

[0050] Multiple concealed slots are arranged in a circular array on the outer side of the cylinder 101. Each concealed slot is composed of a mounting slot 108 and a side plate 107. The side plate 107 is fixedly installed at the outer opening of the mounting slot 108, and the inlet and outlet of the concealed slot are located below the side plate 107. A conductive sheet 120 is fixedly installed on the inner wall of the side plate 107, and the conductive sheet 120 is electrically connected to an external grounding wire. The piston block 113 maintains sliding contact with the inner wall of the side plate 107, the conductive sheet 120, and the inner wall of the mounting slot 108.

[0051] The mounting groove 108 includes a straight groove 109 and an arc-shaped groove 110. The straight groove 109 remains vertical. The upper end of the arc-shaped groove 110 is connected to the lower end of the straight groove 109. The lower end of the arc-shaped groove 110 extends away from the axis of the cylinder 101 and is connected to the outer wall of the cylinder 101. The lower opening of the arc-shaped groove 110 forms the entrance and exit of the hidden groove. A protrusion 115 is fixedly provided at the connection between the straight groove 109 and the arc-shaped groove 110. A sealing plate 116 is rotatably provided at the lower opening of the arc-shaped groove 110, and the lower end of the sealing plate 116 is rotatably connected to the lower opening of the arc-shaped groove 110. An elastic body 117 is fixedly provided inside the lower opening of the arc-shaped groove 110, and the end of the elastic body 117 is fixedly connected to the sealing plate 116.

[0052] The rod 105 is a vertically arranged tubular structure made of a flexible material. The conductive cone 106 is a conical structure. The piston block 113 is slidably disposed inside the straight groove 109 of the mounting groove 108. A wire is disposed inside the rod 105, and the wire is connected to the conductive cone 106 and the piston block 113. The piston block 113 is made of a conductive material, thereby maintaining an electrical connection between the conductive sheet 120 and the conductive cone 106.

[0053] The piston block 113 has an air inlet 114 inside, which is connected to the inside of the rod 105. An air inlet 112 is provided between the air guide chamber 111 and the internal space of the recessed groove above each piston block 113.

[0054] The drill bit 200 includes a main drill body 201, an extension 202, a secondary drill body 203, a guide plate 204, a fixed gear 206, and an actuating gear 205.

[0055] The main drill body 201 includes a cylindrical section and a conical section. The cylindrical section is fixedly disposed at the lower end of the cylinder 101, and the conical section is fixedly disposed at the lower end of the cylindrical section. A guide plate 204 is fixedly disposed on the conical surface of the conical section. One inner end of the guide plate 204 extends to the sharp corner of the conical surface, and the other outer end of the guide plate 204 extends to the outer edge of the conical surface. Three circularly arranged extensions 202 are fixedly disposed on the outer side of the cylindrical section of the main drill body 201. The extensions 202 are hollow structures, and the internal space of the extensions 202 is connected to the internal space of the cylindrical section. A vertical connecting shaft is rotatably disposed inside each extension 202. The lower end of the connecting shaft extends to the outside of the extension 202. A secondary drill body 203 is fixedly disposed at the lower end of the connecting shaft. The secondary drill body 203 is a conical structure, and multiple fragments are fixedly disposed on the conical surface of the secondary drill body 203. The lower end of the core column 118 extends into the cylindrical section of the main drill body 201. A fixed gear 206 is fixedly installed at the lower end of the core column 118, and an actuating gear 205 is fixedly installed at the upper end of each connecting shaft. All actuating gears 205 mesh with the fixed gear 206.

[0056] The working principle of the present invention is:

[0057] The device is moved to the required grounding position using the movable wheels. Then, two lifting motors 303 and a rotating motor 304 are started to rotate. The two lifting motors 303 drive the two threaded rods 302 to rotate respectively. Since the moving platform 301 is screwed to the two threaded rods 302, it slides downward along the vertical section of the fixed frame 310. At the same time, the rotating motor 304 drives the driving gear 305 to rotate, which in turn drives the driven gear 306 to rotate. The driven gear 306 drives the cylinder 101 to rotate outside the core column 118. The cylinder 101 drives the drill head 200 at the lower end to rotate, thus achieving simultaneous descent and rotation of the drill head 200.

[0058] The cylinder 101 drives the main drill body 201 to rotate. The conical section of the main drill body 201 drills a hole in the ground, simultaneously driving a ring of extensions 202 and a ring of auxiliary drill bodies 203 to rotate around the axis of the cylinder 101. Since the fixed gear 206 at the lower end of the core column 118 remains fixed, and the moving gears 205 at the upper end of the connecting shaft mesh with the fixed gears 206, the moving gears 205 rotate. This causes the auxiliary drill bodies 203 to revolve around the axis of the cylinder 101 while maintaining their own rotation, thus improving the drilling efficiency of the auxiliary drill bodies 203. The gap between two adjacent extensions 202 can serve as an active area for breaking up the soil. That is, when the main drill body 201 and the ring of auxiliary drill bodies 203 drill downwards, the broken soil can move through the gap between the two extensions 202 to above the main drill body 201, thereby preventing soil accumulation and hindering drilling operations. By utilizing the distribution of the main drill body 201 and multiple auxiliary drill bodies 203, multi-point breaking of the soil layer can be achieved, increasing the borehole area and avoiding the situation where the reaction force of the soil on the main drill body 201 is concentrated on the lower surface of the main drill body 201 when only the main drill body 201 is used, which would result in excessive drilling resistance. The breaking bodies on the auxiliary drill bodies 203 can be any structure that is conducive to drilling, such as drill teeth or inclined cones. The guide plate 204 can push the broken soil in the middle of the borehole to the gap between multiple adjacent extensions 202 around the borehole.

[0059] During the downward drilling process of the main drill body 201 and the auxiliary drill body 203, the conductive liquid inside the material box 308 is pumped out by the material pump 309, and then fed into the material chamber 103 through the discharge pipe and the feed channel 121. Finally, it is output to the soil through the material hole 104 on the side wall of the material chamber 103, thereby softening the soil and reducing the drilling difficulty of the main drill body 201 and the auxiliary drill body 203. It also reduces the difficulty of inserting the conductive cone 106 into the soil.

[0060] After drilling is complete, the air pump 307 is turned on. The air pump 307 injects high-pressure gas into the air guide chamber 111 through the air inlet pipe and air inlet channel 119. The air guide chamber 111 enters the hidden groove space above each piston block 113 through the air guide hole 112, which increases the pressure in the hidden groove space above the piston block 113. At the same time, the high-pressure gas enters the rod body 105 through the air inlet 114 on the piston block 113, causing the rod body 105 to expand. This prevents the rod body 105 from being squeezed by the soil and becoming bent or flattened after entering the soil. At the same time, the piston block 113 slides downward in the hidden groove under the pressure. The piston block 113 drives the rod body 105 and the conductive cone 106 to slide downward. The conductive cone 106 slides downward in the straight groove 109 of the mounting groove 108. The conductive cone 106 first contacts the protrusion 115, causing it to turn and smoothly enter the arc-shaped groove 110 of the mounting groove 108. It then continues to slide downwards within the arc-shaped groove 110 until it contacts the sealing plate 116. As the piston block 113 continues to slide downwards, the conductive cone 106 pushes open the sealing plate 116 and extends beyond the recessed groove, inserting into the soil. As the piston block 113 continues to slide downwards, the conductive cone 106 is continuously inserted into the soil until a designated depth is reached. The protrusion 115 limits the piston block 113, preventing it from entering the arc-shaped groove 110. Grounding is achieved by maintaining an electrical connection between the conductive cone 106, the wire, the piston block 113, the conductive plate 120, and the external grounding wire. The radial insertion of multiple conductive cones 106 into the soil increases the underground radiation range of the grounding device, facilitating large-area current diffusion and improving grounding effectiveness and safety. Because the pores in the soil are filled with conductive liquid, the conductive cone 106 makes closer contact with the soil, thereby reducing the impact of the pores in the soil on impedance and improving conductivity.

[0061] After grounding is complete, the conductive cone 106 and rod 105 need to be retracted into the recessed groove. At this time, the air pump 307 is controlled to run in reverse, and the air pump 307 draws out the air inside the air guide chamber 111 through the air intake channel 119 and the air intake pipe, thereby drawing the air guide chamber 111 into a negative pressure state. Under the action of negative pressure, the piston block 113 slides upward inside the recessed groove, thereby causing the conductive cone 106 and rod 105 to continuously retract into the recessed groove until they return to their initial positions. After the conductive cone 106 enters the recessed groove, the sealing plate 116 begins to rotate upward under the action of the elastic body 117 until the outlet of the recessed groove is resealed. In order to prevent the conductive cone 106 from being stuck by the sealing plate 116 during retraction, the end of the sealing plate 116 can be designed as an arc-shaped structure, or the connection between the conductive cone 106 and the rod 105 can be designed as an arc-shaped structure.

[0062] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A temporary fast grounding device for substation maintenance, characterized in that: The system includes a frame (300), and a movable platform (301) is slidably mounted inside the frame (300) via a lifting mechanism. A drill rod section (100) is mounted on the movable platform (301), and a drill head (200) is mounted at the lower end of the drill rod section (100). The drill rod section (100) includes a core column (118) and a cylinder (101). The core column (118) is fixedly mounted on the movable platform (301), and the cylinder (101) is rotatably sleeved on the outside of the core column (118). The area between the core column (118) and the cylinder (101) is separated by two upper and lower partition rings (102). A material chamber (103) is separated, and the material chamber (103) is connected to the outside of the cylinder (101) through the material hole (104); multiple vertical hidden grooves are provided on the outer wall of the cylinder (101), and an inlet and outlet are provided at the lower end of the hidden grooves. A rod (105) is provided inside the hidden grooves, and a conductive cone (106) is fixedly provided at the lower end of the rod (105). A piston block (113) is fixedly provided at the upper end of the rod (105). The piston block (113) is slidably provided inside the hidden grooves; the space inside the hidden grooves above the piston block (113) is connected to the air pump (307); The cylinder (101) is rotatably mounted on the outside of the core column (118) via two partition rings (102); a fixing ring (122) is fixedly mounted inside the upper opening of the cylinder (101), and the fixing ring (122) is rotatably sleeved on the outside of the core column (118). The fixing ring (122), the upper partition ring (102), the outer wall of the core column (118), and the inner wall of the cylinder (101) form an annular air guide chamber (111); the upper end of the core column (118) is fixedly inserted into the moving platform (301). The inner side of the middle part of the core column (118) and the upper end of the core column (118) extends to the outer side of the upper end of the moving table (301); an air inlet channel (119) and a feeding channel (121) are provided inside the upper end face of the core column (118). The inlet end of the air inlet channel (119) and the feeding channel (121) are both located at the upper end of the core column (118). The outlet end of the air inlet channel (119) is connected to the interior of the air guide chamber (111), and the outlet end of the feeding channel (121) is connected to the interior of the material chamber (103).

2. The temporary fast grounding device for substation maintenance according to claim 1, characterized in that: The frame (300) includes an upper horizontal plate, two left-right symmetrical vertical plates, and two left-right symmetrical lower horizontal plates. The left and right ends of the upper horizontal plate are fixedly connected to the upper ends of the two vertical plates, and the ends of the two lower horizontal plates that are close to each other are fixedly connected to the lower ends of the two vertical plates that are far away from each other. Multiple casters are provided at the lower ends of the two lower horizontal plates.

3. The temporary fast grounding device for substation maintenance according to claim 2, characterized in that: The lifting mechanism includes a lifting motor (303), a threaded rod (302), and a fixing frame (310). Two L-shaped fixing frames (310) symmetrically arranged are fixedly installed inside the frame (300). Each fixing frame (310) includes a vertical section and a horizontal section. The upper end of the vertical section is fixedly connected to the lower end of the upper horizontal plate of the frame (300), one end of the horizontal section is fixedly connected to the lower end of the vertical section, and the other end of the horizontal section is fixedly connected to the inner surface of the vertical plate on the same side. A vertical threaded rod (302) is rotatably installed inside each fixing frame (310). 02), the lower end of the threaded rod (302) is rotatably connected to the horizontal section of the fixed frame (310); two symmetrical lifting motors (303) are fixedly installed on the upper surface of the upper horizontal plate of the frame (300), the output shafts of the two lifting motors (303) pass vertically downward through the upper horizontal plate of the frame (300) and are fixedly connected to the upper ends of the two threaded rods (302); the two ends of the moving platform (301) are respectively screwed to the outside of the two threaded rods (302), and the moving platform (301) is slidably sleeved on the outside of the vertical section of the two fixed frames (310).

4. The temporary fast grounding device for substation maintenance according to claim 1, characterized in that: A material bin (308) and a feed pump (309) are fixedly installed on the frame (300). The material bin (308) contains conductive liquid. The inlet of the feed pump (309) is connected to the inside of the material bin (308) through the feed pipe. The outlet of the feed pump (309) is connected to one end of the inlet of the feed channel (121) through the discharge pipe. The air pump (307) is fixedly installed on the frame (300). An air inlet pipe is provided at the outlet of the air pump (307). One end of the air inlet pipe is connected to one end of the inlet of the air inlet channel (119).

5. The temporary fast grounding device for substation maintenance according to claim 1, characterized in that: A driven gear (306) is fixedly installed on the outside of the upper opening of the cylinder (101). The driven gear (306) is sleeved on the outside of the core column (118). A rotary motor (304) is fixedly installed at the lower end of the moving table (301). A driving gear (305) is fixedly installed on the output shaft of the rotary motor (304). The driving gear (305) meshes with the driven gear (306).

6. The temporary fast grounding device for substation maintenance according to claim 1, characterized in that: Multiple concealed slots are arranged in a circular array on the outside of the cylinder (101). Each concealed slot is composed of a mounting slot (108) and a side plate (107). The side plate (107) is fixedly installed at the outer opening of the mounting slot (108), and the inlet and outlet of the concealed slot are located below the side plate (107). A conductive sheet (120) is fixedly installed on the inner wall of the side plate (107), and the conductive sheet (120) is electrically connected to the external grounding wire. The piston block (113) maintains sliding contact with the inner wall of the side plate (107), the conductive sheet (120), and the inner wall of the mounting slot (108). The mounting slot (108) includes a straight slot (109) and an arc-shaped slot (110). The straight slot (109) remains vertical, and the arc-shaped slot (110) remains vertical. The upper end of the arc groove (110) is connected to the lower end of the straight groove (109). The lower end of the arc groove (110) extends away from the axis of the cylinder (101) and is connected to the outer wall of the cylinder (101). The lower opening of the arc groove (110) forms the entrance and exit of the hidden groove. A protrusion (115) is fixedly provided at the connection between the straight groove (109) and the arc groove (110). A sealing plate (116) is rotatably provided at the lower opening of the arc groove (110). The lower end of the sealing plate (116) is rotatably connected to the lower opening of the arc groove (110). An elastic body (117) is fixedly provided inside the lower opening of the arc groove (110). The end of the elastic body (117) is fixedly connected to the sealing plate (116).

7. The temporary fast grounding device for substation maintenance according to claim 6, characterized in that: The rod (105) is a vertically arranged tubular structure and is made of a flexible material; the piston block (113) is slidably disposed inside the straight groove (109) of the mounting groove (108); a wire is provided inside the rod (105), and the wire is connected to the conductive cone (106) and the piston block (113), and the piston block (113) is made of a conductive material; an air inlet (114) is provided inside the piston block (113), and the air inlet (114) is connected to the inside of the rod (105); an air inlet (112) is provided between the air inlet chamber (111) and the hidden groove space above each piston block (113).

8. The temporary fast grounding device for substation maintenance according to claim 1, characterized in that: The drill bit (200) includes a main drill body (201), an extension (202), a secondary drill body (203), a guide plate (204), a fixed gear (206), and an actuating gear (205). The main drill body (201) includes a cylindrical section and a conical section. The cylindrical section is fixedly disposed at the lower end of the cylinder (101), and the conical section is fixedly disposed at the lower end of the cylindrical section. Three extensions (202) arranged in a circular array are fixedly disposed on the outer side of the cylindrical section of the main drill body (201). The extensions (202) are hollow structures, and the cylindrical section of the main drill body (201) is also hollow. The internal space of the extensions (202) is connected to the internal space of the cylindrical section. A vertical connecting shaft is rotatably provided on the inner side of each extension (202), with the lower end of the connecting shaft extending to the outer side of the extension (202). A secondary drill body (203) is fixedly provided at the lower end of the connecting shaft. The secondary drill body (203) is a conical structure, and multiple crushing bodies are fixedly provided on the conical surface of the secondary drill body (203). The lower end of the core column (118) extends into the cylindrical section of the main drill body (201). A fixed gear (206) is fixedly provided at the lower end of the core column (118). An actuating gear (205) is fixedly provided at the upper end of each connecting shaft. All actuating gears (205) mesh with the fixed gears (206).

9. The temporary fast grounding device for substation maintenance according to claim 8, characterized in that: A guide plate (204) is fixedly installed on the conical surface of the conical section. One end of the guide plate (204) extends to the sharp corner of the conical surface, and the other end of the guide plate (204) extends to the outer edge of the conical surface.

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