Temporary rapid grounding device for transformer substation maintenance

Abstract

The invention relates to a temporary rapid grounding device for substation maintenance, and belongs to the technical field of grounding equipment. Comprising a core column and a cylinder, the core column is fixedly arranged on the moving table, the cylinder is rotationally connected to the outer side of the core column in a sleeving mode, and the moving table is arranged in the moving table through a lifting mechanism in a sliding mode. The area between the core column and the barrel is divided into a material chamber through an upper separation ring and a lower separation ring, and the material chamber is communicated with the outer side of the barrel through a material hole; a plurality of vertical hidden grooves are formed in the outer wall of the barrel, an inlet and outlet is formed in the lower end of each hidden groove, a rod body is arranged in each hidden groove, a conductive conical head is fixedly arranged at the lower end of each rod body, a piston block is fixedly arranged at the upper end of each rod body, and each piston block is arranged in the corresponding hidden groove in a sliding mode; the internal space of the hidden groove above the piston block is connected with an air pump; the problems of limited application scene and poor grounding effect of the grounding technology for the power failure equipment in the maintenance process at present are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of grounding equipment, and in particular relates to a temporary quick grounding device used for maintenance of a transformer substation. Background Art

[0002] As power systems continue to expand and voltage levels gradually increase, the frequency and complexity of substation equipment maintenance have increased significantly. To ensure the safety of workers during maintenance, reliable grounding of power-off equipment is crucial. This effectively eliminates residual electrical charge and prevents the risk of electric shock from mis-energized or induced current.

[0003] However, existing grounding technology mainly relies on workers to manually connect the grounding wire to pre-buried grounding piles, grounding copper pillars and other grounding structures through bolts. This traditional grounding method has many problems: First, the application scenarios are limited. It must ensure that a grounding structure is pre-buried on site. If such a structure is not available, temporary and rapid grounding work cannot be carried out, making it difficult to meet the complex and changing actual maintenance needs.

[0004] Second, the grounding effect is poor. Numerous gaps exist between the grounding structure and the underground soil, resulting in high grounding impedance and a high risk of poor contact. This, in turn, affects the stability and reliability of the grounding system, failing to provide adequate safety protection for workers.

[0005] In practical applications, technical personnel in related fields have made many attempts to solve the problems existing in the above-mentioned existing grounding technologies, but they all face great difficulties. For example, to solve the problem of limited application scenarios, it is necessary to consider quickly building a reliable grounding connection in places where there is no pre-buried grounding structure. However, how to achieve fast and convenient installation while ensuring the grounding effect has become a major problem. The traditional method relies on manual bolt tightening connection, which is cumbersome and time-consuming, and cannot meet the needs of temporary and rapid grounding.

[0006] To address the issue of poor grounding effectiveness, reducing the gap between the grounding structure and the soil and thus reducing ground impedance are key. However, soil physical properties are complex and variable, with texture, moisture, and other conditions varying significantly across regions and depths. Finding a universal method or material to effectively fill gaps and reduce impedance while also ensuring good contact with the soil and long-term stability is a technically challenging task.

[0007] Research literature on power grounding technology has already highlighted the shortcomings of traditional grounding methods. For example, the "Power System Grounding Technology Manual" (published in 2023) notes that reliance on pre-buried grounding structures limits temporary operations, creates high impedance gaps between the grounding structure and the soil, and creates reliability risks due to poor contact. The "Discussion on Grounding Methods for Metal Sheathed High-Voltage Single-Core Cables" (published in 2015) notes that traditional bolt-tightening methods are difficult to deploy in complex environments, require time-consuming manual operations, and are not suitable for emergency maintenance scenarios. Long-term use can lead to increased contact resistance due to loosening, and there is no universal solution to address the impact of varying soil conditions on grounding effectiveness. These documents indirectly demonstrate the shortcomings 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 address these issues. Summary of the Invention

[0008] The present invention overcomes the shortcomings of the existing technology and proposes a temporary rapid grounding device for substation maintenance; it solves the problem that the grounding technology used for power outage equipment during maintenance is currently limited in application scenarios and has poor grounding effect.

[0009] In order to achieve the above object, the present invention is implemented through the following technical solutions.

[0010] A temporary quick grounding device for substation maintenance includes a frame, a mobile platform is slidably arranged inside the frame through a lifting mechanism, a drill rod part is arranged on the mobile platform, and a drill head is arranged at the lower end of the drill rod part. The drill rod part includes a core column and a cylinder, the core column is fixedly arranged on the mobile platform, and the cylinder is rotatably sleeved on the outside of the core column, and the area between the core column and the cylinder is separated into a material chamber by two upper and lower separating rings, and the material chamber is connected with the outside of the cylinder through a material hole; a plurality of vertical hidden grooves are arranged on the outer wall of the cylinder, and an entrance and exit are arranged at the lower end of the hidden groove, and a rod body is arranged inside the hidden groove, a conductive cone head is fixedly arranged at the lower end of the rod body, and a piston block is fixedly arranged at the upper end of the rod body, and the piston block is slidably arranged inside the hidden groove; the internal space of the hidden groove above the piston block is connected to the air pump.

[0011] Furthermore, the frame 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 respectively 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 respectively fixedly connected to the lower ends of the end surfaces of the two vertical plates that are away from each other; a plurality of movable wheels are respectively provided at the lower ends of the two lower horizontal plates.

[0012] Furthermore, the lifting mechanism includes a lifting motor, a threaded rod, and a fixed frame; two left-right symmetrical L-shaped fixed frames are fixedly arranged inside the frame, and the fixed frame includes a vertical section and a horizontal section, the upper end of the vertical section is fixedly connected to the lower end surface 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 surface of the vertical plate on the same side; a vertical threaded rod is rotatably arranged inside each fixed frame, and the lower end of the threaded rod is rotatably connected to the horizontal section of the fixed frame; two left-right symmetrical lifting motors are fixedly arranged on the upper end 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 respectively fixedly connected to the upper ends of the two threaded rods; the two ends of the movable platform are respectively screwed to the outside of the two threaded rods, and the movable platform is slidably sleeved on the outside of the vertical sections of the two fixed frames.

[0013] Furthermore, the cylinder is rotatably arranged on the outside of the core column through two separating rings; a fixing ring is fixedly arranged inside the upper end opening of the cylinder, and the fixing ring is rotatably sleeved on the outside of the core column, and a circular air guide chamber is formed between the fixing ring, the upper separating ring, the outer wall of the core column and the inner wall of the cylinder; the upper end of the core column is fixedly inserted into the inner side of the middle part of the movable platform, and the upper end of the core column extends to the outer side of the upper end of the movable platform; an air intake channel and a feed channel are provided inside the upper end surface of the core column, and the inlet ends of the air intake channel and the feed channel are both located at the upper end of the core column, and the outlet end of the air intake channel is connected to the inside of the air guide chamber, and the outlet end of the feed channel is connected to the inside of the material chamber.

[0014] Furthermore, a material box and a feed pump are fixedly installed on the frame, the conductive liquid is contained inside the material box, the inlet of the feed pump is connected to the inside of the material box through a feed pipe, and the outlet of the feed pump is connected to one end of the inlet of the feed channel through a discharge pipe; the air pump is fixedly installed on the frame, and an air intake pipe is provided at the outlet of the air pump, and one end of the outlet of the air intake pipe is connected to one end of the inlet of the air intake channel.

[0015] Furthermore, a driven gear is fixedly provided on the outer side of the upper opening of the cylinder, and the driven gear is sleeved on the outer side of the core column. A rotating motor is fixedly provided on the lower end of the movable platform, and a driving gear is fixedly provided on the output shaft of the rotating motor, and the driving gear is meshed with the driven gear.

[0016] Furthermore, a plurality of hidden grooves are arranged in a circular array on the outer side of the cylinder, and the hidden groove is composed of a mounting groove and a side plate body, the side plate body is fixedly arranged at the outer opening of the mounting groove, and the entrance and exit of the hidden groove is located below the side plate body; a conductive sheet is fixedly arranged on the inner wall of the side plate body, 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 body, the conductive sheet and the inner wall of the mounting groove; the mounting groove includes a straight groove and an arc groove, the straight groove remains vertical, 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 in a direction away from the axis of the cylinder body and is connected to the outer wall of the cylinder, and the lower end opening of the arc groove constitutes the entrance and exit of the hidden groove; a protrusion is fixedly arranged at the connection between the straight groove and the arc groove; a sealing plate is rotatably arranged at the lower end opening of the arc groove, and the lower end of the sealing plate is rotatably connected to the lower end opening of the arc groove; an elastomer is fixedly arranged inside the lower end opening of the arc groove, and the end of the elastomer is fixedly connected to the sealing plate.

[0017] Furthermore, the rod body is a vertically arranged tubular structure, and the rod body is made of a flexible material; the piston block is slidably arranged inside the linear groove of the mounting groove; a wire is arranged inside the rod body, and the wire is connected to the conductive cone head and the piston block, and the piston block is made of a conductive material; an inflation hole is arranged inside the piston block, and the inflation hole is connected to the inside of the rod body; an air guide hole is arranged between the air guide chamber and the internal space of the hidden groove above each piston block.

[0018] Furthermore, the drill head includes a main drill body, an extension part, an auxiliary drill body, a guide plate, a fixed gear, and an action gear; the main drill body includes a cylindrical section and a conical section, the cylindrical section is fixedly arranged at the lower end of the cylinder body, and the conical section is fixedly arranged at the lower end of the cylindrical section; three extension parts arranged in a circular array are fixedly arranged on the outer side surface of the cylindrical section of the main drill body, the extension part is a hollow structure, the cylindrical section of the main drill body is a hollow structure, and the internal space of the extension part is connected with the internal space of the cylindrical section; a vertical connecting shaft is rotatably arranged on the inner side of each extension part, the lower end of the connecting shaft extends to the outside of the extension part, and an auxiliary drill body is fixedly arranged at the lower end of the connecting shaft, the auxiliary drill body is a conical structure, and a plurality of crushing bodies are fixedly arranged on the conical surface of the auxiliary drill body; the lower end of the core column extends into the cylindrical section of the main drill body, and a fixed gear is fixedly arranged at the lower end of the core column, and an action gear is fixedly arranged on the upper end of each connecting shaft, and all the action gears are meshed with the fixed gear.

[0019] Furthermore, a circle of guide plates is fixedly provided on the conical surface of the conical section, the inner end of the guide plates extends to the sharp corner of the conical surface, and the outer end of the guide plates extends to the outer edge of the conical surface.

[0020] The beneficial effects of the present invention compared to the prior art are: Structural analysis shows that drilling, filling with conductive fluid, and extending several conductive cones in all directions can increase the grounding device's underground radiation range, facilitate current diffusion over a large area, and improve grounding effectiveness and safety. Furthermore, the conductive fluid reduces drilling difficulty and fills voids within the soil, thereby reducing 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 have shown that reduced grounding impedance provides greater safety for workers, avoiding the risk of electric shock from poor grounding and ensuring safe and efficient substation maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention Figure 2 ; Figure 3 It is a schematic diagram of the connection between the drill rod and the drill head; Figure 4 It is a structural diagram of the drill rod; Figure 5 It is a three-dimensional schematic diagram of the drill pipe section after cutting; Figure 6 It is a three-dimensional schematic diagram after the cylinder is cut; Figure 7 It is a structural diagram of the hidden groove; Figure 8 yes Figure 7 A partial enlarged schematic diagram of point A in the middle; Figure 9 It is a schematic diagram of the structure after the core column and two separation rings are cut; Figure 10 It is a structural diagram of the drill head; Figure 11 It is a structural diagram of the drill head after the main drill body and extension part are cut; Among them, 100 is the drill rod part, 101 is the cylinder, 102 is the separator ring, 103 is the material chamber, 104 is the material hole, 105 is the rod body, 106 is the conductive cone head, 107 is the side plate, 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 charging 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 feed channel, and 122 is the fixing ring; 200 is the drill head, 201 is the main drill body, 202 is the extension part, 203 is the auxiliary drill body, 204 is the guide plate, 205 is the action gear, and 206 is the fixed gear; 300 is a frame, 301 is a moving platform, 302 is a threaded rod, 303 is a lifting motor, 304 is a rotating motor, 305 is a driving gear, 306 is a driven gear, 307 is an air pump, 308 is a material box, 309 is a feed pump, and 310 is a fixed frame. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. The technical solutions of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0023] like Figure 1 As shown in FIG11 , the present invention provides a temporary quick grounding device for substation maintenance, including a frame 300, a movable platform 301 is slidably arranged inside the frame 300 through a lifting mechanism, a drill rod portion 100 is arranged on the movable platform 301, a drill head portion 200 is arranged at the lower end of the drill rod portion 100, the drill rod portion 100 includes a core column 118 and a barrel 101, the core column 118 is fixedly arranged on the movable platform 301, the barrel 101 is rotatably sleeved on the outside of the core column 118, and the area between the core column 118 and the barrel 101 is A material chamber 103 is separated by two upper and lower separating rings 102, and the material chamber 103 is connected to the outside of the cylinder 101 through the material hole 104; a plurality of vertical hidden grooves are provided on the outer wall of the cylinder 101, and an entrance and exit are provided at the lower end of the hidden groove. A rod body 105 is provided inside the hidden groove, and a conductive cone head 106 is fixedly provided at the lower end of the rod body 105, and a piston block 113 is fixedly provided at the upper end of the rod body 105, and the piston block 113 is slidably provided inside the hidden groove; the internal space of the hidden groove above the piston block 113 is connected to the air pump 307.

[0024] The frame 300 comprises 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, while the ends of the two lower horizontal plates, which are closer to each other, are fixedly connected to the lower ends of the two vertical plates, which are farther away from each other. A plurality of movable wheels are provided at the lower ends of the two lower horizontal plates, enabling the entire device to be moved.

[0025] The lifting mechanism includes a lifting motor 303, a threaded rod 302, and a fixed frame 310. Two symmetrical L-shaped fixed frames 310 are fixedly installed inside the frame 300. The fixed frames 310 include a vertical section and a horizontal section. The upper end of the vertical section is fixedly connected to the lower end surface 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 surface of the vertical plate on the same side. A vertical threaded rod 302 is rotatably installed inside each fixed frame 310, and 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 end surface of the upper horizontal plate of the frame 300. The output shafts of the two lifting motors 303 vertically and downwardly pass through the upper horizontal plate of the frame 300 and are fixedly connected to the upper ends of the two threaded rods 302.

[0026] The movable platform 301 is kept horizontal, and both ends of the movable platform 301 are respectively screwed to the outside of the two threaded rods 302 . At the same time, the movable platform 301 is slidably sleeved on the outside of the vertical sections of the two fixed frames 310 .

[0027] The two threaded rods 302 are driven to rotate by two lifting motors 303 respectively. Since the movable platform 301 is screwed to the two threaded rods 302, the movable platform 301 is driven to slide along the vertical section of the fixed frame 310, thereby realizing the lifting of the movable platform 301.

[0028] The core column 118 is a vertically mounted rod-shaped structure. The cylinder body 101 is a cylindrical structure with openings at both ends. The separator ring 102 is a horizontally mounted annular structure. The cylinder body 101 is rotatably mounted on the outside of the core column 118 via the two separator rings 102. A circular fixing ring 122 is fixedly mounted inside the upper opening of the cylinder body 101. The fixing ring 122 is rotatably sleeved on the outside of the core column 118. An annular air guide chamber 111 is formed between the fixing ring 122, the upper separator ring 102, the outer wall of the core column 118, and the inner wall of the cylinder body 101.

[0029] The upper end of the stem 118 is fixedly inserted into the middle inner side of the movable platform 301, and the upper end of the stem 118 extends to the outer side of the upper end of the movable platform 301. An L-shaped air inlet channel 119 and an L-shaped feed channel 121 are provided inside the upper end surface of the stem 118. The inlet ends of the air inlet channel 119 and the feed channel 121 are both located at the upper end of the stem 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 feed channel 121 is connected to the interior of the material chamber 103.

[0030] A plurality of material holes 104 are provided on the side wall of the cylinder 101, and the opening at one end of the outer side of the material hole 104 is tilted upward to prevent soil from entering the material hole 104 and blocking the material hole 104 during drilling; the inner end of the material hole 104 is connected to the material chamber 103.

[0031] A material box 308 and a feed pump 309 are fixedly mounted on the upper horizontal plate of the frame 300. The conductive liquid is contained within the material box 308. The inlet of the feed pump 309 is connected to the interior of the material box 308 via a feed pipe, and the outlet of the feed pump 309 is connected to one end of the inlet of the feed channel 121 via a discharge pipe. The feed pump 309 pumps the conductive liquid from the material box 308 and delivers it to the interior of the material chamber 103 through the discharge pipe and the feed channel 121. The conductive liquid can be a fluid such as saline or conductive gel.

[0032] The air pump 307 is fixedly mounted on the upper horizontal plate of the frame 300. An air intake pipe is provided at the outlet of the air pump 307, and one end of the air intake pipe is connected to the inlet end of the air intake channel 119. The air pump 307 can inject high-pressure gas into the air guide chamber 111 through the air intake pipe and the air intake channel 119, and can also extract air from the air guide chamber 111 through the air intake channel 119 and the air intake pipe, thereby reducing the pressure inside the air guide chamber 111 to a negative state.

[0033] A driven gear 306 is fixedly mounted on the outside of the upper opening of the barrel 101. The driven gear 306 is sleeved onto the outside of the core column 118. A rotary motor 304 is fixedly mounted on the lower end of the movable platform 301. A driving gear 305 is fixedly mounted on the output shaft of the rotary motor 304. The driving gear 305 meshes with the driven gear 306. The rotary 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 barrel 101 to rotate outside the core column 118, which in turn drives the drill head 200 at the lower end to rotate.

[0034] Multiple hidden slots are arranged in a circular array on the outside of the cylinder 101. These slots consist of a mounting slot 108 and a side plate 107. The side plate 107 is fixed to the outer opening of the mounting slot 108, with the entrance and exit of the hidden slot located below the side plate 107. A conductive sheet 120 is fixed to the inner wall of the side plate 107 and 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.

[0035] The mounting groove 108 includes a straight groove 109 and an arcuate groove 110. The straight groove 109 remains vertical. The upper end of the arcuate groove 110 is connected to the lower end of the straight groove 109. The lower end of the arcuate groove 110 extends in a direction away from the axis of the cylinder 101 and is connected to the outer wall of the cylinder 101. The lower end opening of the arcuate groove 110 constitutes the entrance and exit of the hidden groove. A protrusion 115 is fixedly provided at the connection between the straight groove 109 and the arcuate groove 110. A sealing plate 116 is rotatably provided at the lower end opening of the arcuate groove 110. The lower end of the sealing plate 116 is rotatably connected to the lower end opening of the arcuate groove 110. An elastic body 117 is fixedly provided inside the lower end opening of the arcuate groove 110. The end of the elastic body 117 is fixedly connected to the sealing plate 116.

[0036] The rod 105 is a vertically mounted tubular structure made of a flexible material. The conductive cone head 106 is a conical structure. The piston block 113 is slidably mounted within the linear groove 109 of the mounting slot 108. A wire is disposed within the rod 105 and connects the conductive cone head 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 head 106.

[0037] The piston block 113 is provided with an air filling hole 114 inside, and the air filling hole 114 is connected with the inside of the rod body 105. An air guide hole 112 is provided between the air guide chamber 111 and the inner space of the hidden groove above each piston block 113.

[0038] The drill head 200 includes a main drill body 201 , an extension portion 202 , an auxiliary drill body 203 , a guide plate 204 , a fixed gear 206 , and an actuating gear 205 .

[0039] The main drill body 201 comprises a cylindrical section and a conical section. The cylindrical section is fixed to the lower end of the barrel 101, and the conical section is fixed to the lower end of the cylindrical section. A guide plate 204 is fixed to the conical surface of the conical section. The inner end of the guide plate 204 extends to the sharp corner of the conical surface, and the outer end of the guide plate 204 extends to the outer edge of the conical surface. Three extensions 202 arranged in a circular array are fixed to the outer side of the cylindrical section of the main drill body 201. These extensions 202 are hollow structures, and the interior space of the extensions 202 is connected to the interior space of the cylindrical section. A vertical connecting shaft is rotatably mounted inside each extension 202. The lower end of the connecting shaft extends outside the extension 202. A secondary drill body 203 is fixed to the lower end of the connecting shaft. The secondary drill body 203 is a conical structure with multiple crushing bodies fixed to its conical surface. 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 action gear 205 is fixedly provided at the upper end of each connecting shaft. All action gears 205 are engaged with the fixed gear 206.

[0040] The working principle of the present invention is: The device is moved to the desired grounding position using the moving wheels. The two lifting motors 303 are then controlled to start rotating, while the rotating motor 304 is also controlled to start rotating. The two lifting motors 303 respectively drive the two threaded rods 302 to rotate. Since the movable platform 301 is threadedly connected to the two threaded rods 302, the movable platform 301 is driven to slide downward along the vertical section of the fixed frame 310. Simultaneously, the rotating motor 304 drives the driving gear 305, which in turn drives the driven gear 306. The driven gear 306 drives the barrel 101 to rotate outside the core column 118. The barrel 101 then drives the drill head 200 at the lower end to rotate, allowing the drill head 200 to rotate while descending.

[0041] The barrel 101 drives the main drill body 201 to rotate, and the conical section of the main drill body 201 drills the ground, simultaneously driving the ring of extensions 202 and the ring of auxiliary drill bodies 203 to rotate about the axis of the barrel 101. Because the fixed gear 206 at the lower end of the core column 118 remains stationary, the actuating gears 205 at the upper end of the ring of connecting shafts mesh with the fixed gear 206, driving the actuating gears 205 to rotate. This drives the ring of auxiliary drill bodies 203 to orbit around the axis of the barrel 101 while maintaining their own rotation, thereby improving the drilling efficiency of the ring of auxiliary drill bodies 203. The gap between two adjacent extensions 202 serves as an active area for soil crushing. That is, as the main drill body 201 and the ring of auxiliary drill bodies 203 drill downward, crushed soil can move through the gap between the two extensions 202 to above the main drill body 201, thereby preventing soil accumulation that could hinder drilling. By utilizing the distribution of the main drill body 201 and multiple auxiliary drill bodies 203, multi-point crushing of the soil layer can be achieved, the drilling area can be increased, and the reaction force of the soil on the main drill body 201 can be avoided from being concentrated on the lower surface of the main drill body 201 when only the main drill body 201 is used, thereby causing excessive drilling resistance; the crushing bodies on the auxiliary drill bodies 203 can be any structure that helps drilling work, such as drill teeth and inclined cones; the setting of the guide plate 204 can push the crushed soil in the middle of the borehole to the gap position between multiple adjacent extension parts 202 on the surrounding area.

[0042] During the downward drilling process of the main drill body 201 and the auxiliary drill body 203, the conductive liquid in the material box 308 is pumped out by the feed pump 309, and is input into the material chamber 103 after passing through the discharge pipe and the feed channel 121, and finally output to the inside of the soil through the material hole 104 on the side wall of the material chamber 103, thereby softening the soil, thereby reducing the difficulty of drilling the main drill body 201 and the auxiliary drill body 203, and also reducing the difficulty of inserting the subsequent conductive cone head 106 into the soil.

[0043] After drilling is completed, 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 the 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, increasing the pressure in the hidden groove space above the piston block 113. The high-pressure gas enters the rod body 105 through the inflation hole 114 on the piston block 113, causing the rod body 105 to expand. In this way, the rod body 105 will not be squeezed by the soil and will not be bent or compressed after entering the soil. At the same time, the piston block 113 slides downward in the hidden groove under the action of pressure, driving the rod body 105 and the conductive cone head 106 to slide downward. The conductive cone head 106 slides downward in the linear groove 109 of the mounting groove 108. The conductive cone 106 first contacts the protrusion 115, causing it to turn and smoothly enter the arcuate groove 110 of the mounting groove 108. It then continues to slide downward within the arcuate groove 110 until it contacts the sealing plate 116. As the piston block 113 continues to slide downward, the conductive cone 106 pushes the sealing plate 116 away and extends outside the hidden groove, inserting it into the soil. As the piston block 113 continues to slide downward, the conductive cone 106 continues to penetrate the soil until it reaches a specified depth. The protrusion 115 limits the piston block 113, preventing it from entering the arcuate groove 110. The conductive cone 106, the wire, the piston block 113, and the conductive sheet 120 maintain electrical connection with the external grounding wire, thereby achieving grounding. Multiple conductive cones 106 are inserted radially into the soil, increasing the grounding device's radiation range underground, facilitating the spread of current over a large area, and improving grounding effectiveness and safety. Since the voids in the soil are filled with conductive liquid, the conductive cone head 106 is in closer contact with the soil, thereby reducing the effect of the voids in the soil on the impedance and improving the conductivity.

[0044] After grounding is completed, it is necessary to retract the conductive cone head 106 and the rod body 105 into the hidden groove. At this time, the air pump 307 is controlled to run in the opposite direction. The air pump 307 extracts the air inside the air guide chamber 111 through the air inlet channel 119 and the air inlet pipe, thereby pumping the air guide chamber 111 into a negative pressure state. In this way, the piston block 113 slides upward inside the hidden groove under the action of the negative pressure, thereby causing the conductive cone head 106 and the rod body 105 to be continuously retracted into the hidden groove until they return to their initial position. After the conductive cone head 106 enters the hidden groove, the sealing plate 116 begins to rotate upward under the action of the elastic body 117 until the outlet of the hidden groove is resealed. In order to prevent the conductive cone head 106 from being stuck by the sealing plate 116 when it is recovered, the end of the sealing plate 116 can be designed as an arc structure, or the connection between the conductive cone head 106 and the rod body 105 can be designed as an arc structure.

[0045] 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 embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. Temporary quick grounding device for substation maintenance, characterized by: The invention comprises a frame (300), a movable platform (301) is slidably arranged inside the frame (300) through a lifting mechanism, a drill rod portion (100) is arranged on the movable platform (301), a drill head portion (200) is arranged at the lower end of the drill rod portion (100), the drill rod portion (100) comprises a core column (118) and a barrel (101), the core column (118) is fixedly arranged on the movable platform (301), the barrel (101) is rotatably sleeved on the outside of the core column (118), and the area between the core column (118) and the barrel (101) is separated by two upper and lower separation rings (102). ) is separated into a material chamber (103), and the material chamber (103) is connected to the outside of the cylinder (101) through the material hole (104); a plurality of vertical hidden grooves are provided on the outer wall of the cylinder (101), and an entrance and exit are provided at the lower end of the hidden groove. A rod (105) is provided inside the hidden groove, and a conductive cone head (106) is fixedly provided at the lower end of the rod (105), and a piston block (113) is fixedly provided at the upper end of the rod (105), and the piston block (113) is slidably provided inside the hidden groove; the internal space of the hidden groove above the piston block (113) is connected to the air pump (307).

2. The temporary rapid grounding device for substation maintenance according to claim 1, characterized in that: The frame (300) comprises 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 respectively 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 respectively fixedly connected to the lower ends of the end surfaces of the two vertical plates that are away from each other; and a plurality of movable wheels are respectively provided at the lower ends of the two lower horizontal plates.

3. The temporary rapid grounding device for substation maintenance according to claim 2, characterized in that: The lifting mechanism comprises a lifting motor (303), a threaded rod (302), and a fixing frame (310); two bilaterally symmetrical L-shaped fixing frames (310) are fixedly arranged inside the frame (300); the fixing frame (310) comprises a vertical section and a horizontal section, the upper end of the vertical section is fixedly connected to the lower end surface 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 surface of the vertical plate on the same side; a vertical threaded rod (302) is rotatably arranged 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 left-right symmetrical lifting motors (303) are fixedly provided on the upper end surface of the upper horizontal plate of the frame (300), and the output shafts of the two lifting motors (303) vertically downwardly pass through the upper horizontal plate of the frame (300) and are respectively fixedly connected to the upper ends of the two threaded rods (302); the two ends of the movable platform (301) are respectively screwed to the outer sides of the two threaded rods (302), and the movable platform (301) is slidably sleeved on the outer sides of the vertical sections of the two fixed frames (310).

4. The temporary rapid grounding device for substation maintenance according to claim 1, characterized in that: The cylinder (101) is rotatably arranged on the outside of the core column (118) through two separation rings (102); a fixing ring (122) is fixedly arranged inside the upper end opening of the cylinder (101), and the fixing ring (122) is rotatably sleeved on the outside of the core column (118). A circular air guide chamber (111) is formed between the fixing ring (122), the upper separation ring (102), the outer wall of the core column (118), and the inner wall of the cylinder (101); the upper end of the core column (118) is fixedly plugged into the movable platform (301) ), and the upper end of the core column (118) extends to the outer side of the upper end of the movable platform (301); an air inlet channel (119) and a feed channel (121) are provided inside the upper end surface of the core column (118), and the inlet ends 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 interior of the air guide chamber (111), and the outlet end of the feed channel (121) is connected to the interior of the material chamber (103).

5. The temporary rapid grounding device for substation maintenance according to claim 4, characterized in that: A material box (308) and a feed pump (309) are fixedly arranged on the frame (300). The material box (308) contains conductive liquid. The inlet of the feed pump (309) is connected to the inside of the material box (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 air pump (307) is fixedly arranged on the frame (300). An air inlet pipe is arranged at the outlet of the air pump (307), and one end of the outlet of the air inlet pipe is connected to one end of the inlet of the air inlet channel (119).

6. The temporary rapid grounding device for substation maintenance according to claim 1, characterized in that: A driven gear (306) is fixedly provided on the outer side of the upper opening of the cylinder (101), and the driven gear (306) is sleeved on the outer side of the core column (118). A rotating motor (304) is fixedly provided on the lower end of the movable platform (301), and a driving gear (305) is fixedly provided on the output shaft of the rotating motor (304), and the driving gear (305) is meshed with the driven gear (306).

7. The temporary rapid grounding device for substation maintenance according to claim 4, characterized in that: A plurality of hidden grooves are arranged in a circular array on the outside of the cylinder (101), the hidden grooves are composed of a mounting groove (108) and a side plate (107), the side plate (107) is fixedly arranged at the outer opening of the mounting groove (108), and the entrance and exit of the hidden groove are located below the side plate (107); a conductive sheet (120) is fixedly arranged 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) is in sliding contact with the inner wall of the side plate (107), the conductive sheet (120) and the inner wall of the mounting groove (108); the mounting groove (108) includes a straight groove (109) and an arc groove (110), the straight groove (109) is kept vertical, and the arc groove (110) is kept 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 in a direction away from the axis of the cylinder (101) and is connected to the outer wall of the cylinder (101), and the lower end opening of the arc groove (110) constitutes 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 end opening of the arc groove (110), and the lower end of the sealing plate (116) is rotatably connected to the lower end opening of the arc groove (110); an elastic body (117) is fixedly provided inside the lower end opening of the arc groove (110), and the end of the elastic body (117) is fixedly connected to the sealing plate (116).

8. The temporary rapid grounding device for substation maintenance according to claim 7, characterized in that: The rod body (105) is a vertically arranged tubular structure, and the rod body (105) is made of a bendable material; the piston block (113) is slidably arranged inside the linear groove (109) of the mounting groove (108); a wire is arranged inside the rod body (105), and the wire is connected to the conductive cone head (106) and the piston block (113), and the piston block (113) is made of a conductive material; an air filling hole (114) is arranged inside the piston block (113), and the air filling hole (114) is connected to the inside of the rod body (105); an air guide hole (112) is provided between the air guide chamber (111) and the internal space of the hidden groove above each piston block (113).

9. The temporary rapid grounding device for substation maintenance according to claim 1, characterized in that: The drill head (200) comprises a main drill body (201), an extension part (202), an auxiliary drill body (203), a guide plate (204), a fixed gear (206), and an action gear (205); the main drill body (201) comprises a cylindrical section and a conical section, the cylindrical section is fixedly arranged at the lower end of the barrel (101), and the conical section is fixedly arranged at the lower end of the cylindrical section; three extension parts (202) arranged in a circular array are fixedly arranged on the outer side surface of the cylindrical section of the main drill body (201), the extension parts (202) are hollow structures, the cylindrical section of the main drill body (201) is hollow structure, and the internal space of the extension part (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 portion (202), the lower end of the connecting shaft extends to the outer side of the extension portion (202), and an auxiliary drill body (203) is fixedly provided on the lower end of the connecting shaft. The auxiliary drill body (203) is a conical structure, and a plurality of crushing bodies are fixedly provided on the conical surface of the auxiliary drill body (203); the lower end of the core column (118) extends into the cylindrical section of the main drill body (201), and a fixed gear (206) is fixedly provided at the lower end of the core column (118). An action gear (205) is fixedly provided on the upper end of each connecting shaft, and all the action gears (205) are meshed with the fixed gear (206).

10. The temporary rapid grounding device for substation maintenance according to claim 9, characterized in that: A circle of guide plates (204) is fixedly provided on the conical surface of the conical section, wherein an inner end of the guide plate (204) extends to the sharp corner of the conical surface, and an outer end of the guide plate (204) extends to the outer edge of the conical surface.

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