Composite grounding device for power grounding system

Abstract

The invention discloses a combined type grounding device for an electric power grounding system, and relates to the technical field of electric power grounding piles, the combined type grounding device comprises lifting rods, a grounding assembly and an angle mechanism, the number of the lifting rods is two, and the top ends of the two lifting rods are rotatably connected with positioning balls in a limiting manner; the opposite faces of the two positioning balls jointly penetrate through the same positioning frame, an electric power structure is arranged on one side of the positioning frame, and the positions where the two lifting rods are located are parallel to the structural face of the electric power structure. By arranging the angle mechanism, free control over the pile driving angle is achieved; by arranging the screwing-in mechanism, the driving mode of the pile body is adjusted to be a screwing-in mode; by arranging the bottom expanding mechanism, after the pile body is completely driven in, the wing pin automatically stretches out to increase the bearing area of the pile end.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power grounding piles, in particular to a composite grounding device for an electric power grounding system. Background Art

[0002] The power grounding system is an important part of the power system designed to ensure safe and reliable operation. It mainly connects electrical equipment, lines or structures to the earth to achieve their safety protection, voltage stability, fault current diversion and lightning protection functions.

[0003] After searching, the Chinese patent with publication number CN119340692A includes an electric grounding mechanism, which is used for grounding of power projects. The electric grounding mechanism includes an electric grounding column, and auxiliary plates are fixed on the four sides of the outer wall of the electric grounding column. By pressing the positioning rotating ring, the positioning column is inserted into the ground after passing through the positioning hole opened on the outer wall of the auxiliary positioning frame. Through the auxiliary positioning of the positioning sleeve fixed on the top of the auxiliary positioning frame, the pressing seat drives the electric grounding column and the auxiliary plate to be pressed into the ground stably and vertically. The positioning rotating ring is rotated to rotate the position of the positioning sleeve and the auxiliary plate. When the bottom end of the auxiliary positioning frame is engaged with the top of the auxiliary plate, the positioning rotating ring is pressed downward to make the positioning column stably inserted into the ground, so that the electric grounding column and the auxiliary plate are protected. Through the stable positioning of the auxiliary plate, the hidden danger of the electric grounding column rotating due to accidental touch is avoided, and the hidden danger of the electric grounding column loosening and falling off is reduced.

[0004] However, the above scheme adopts a grounding method of vertically pressing into the ground. The anchoring strength of the grounding pile itself is insufficient, and the anchoring force is provided only by the friction between the pile surface and the soil. There is no mechanical bite structure, the pull-out strength is low, and it is easy to loosen and fall out. On the other hand, when the pile body is forcibly squeezed into the soil layer, the surrounding soil body will undergo shear plastic deformation, which will reduce the original bearing capacity of the soil structure. In addition, the intense friction between the pile body surface and the soil during the pressing process has the risk of generating a powdered layer, thereby reducing the contact conductivity and long-term anchoring force. In addition, the above scheme only realizes the process of driving the pile body vertically into the ground. Although it can avoid the rotation of the pile body itself, its seismic performance is not significantly improved compared with the existing technology. There is also the risk of falling out, tilting or breaking during an earthquake. Summary of the Invention

[0005] The object of the present invention is to provide a composite grounding device for an electric power grounding system, which has the advantages of high seismic resistance and angle control, and solves the problems raised in the background art.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a composite grounding device for an electric grounding system, comprising a lifting rod, a grounding assembly, and an angle mechanism, wherein the lifting rods are provided in two groups, and the top ends of the two groups of lifting rods are connected to positioning balls for limited rotation, and the same positioning frame is passed through the opposing surfaces of the two positioning balls, and a power structure is provided on one side of the positioning frame, and the orientation of the two lifting rods is parallel to the structural surface of the power structure; The grounding assembly includes a screw-in mechanism for driving the pile body and a bottom-expanding mechanism for expanding the bearing area of the pile end.

[0007] Preferably, the angle mechanism includes a bracket fixedly connected to the upper surface of one of the positioning balls, a worm is passed through the end of the bracket away from the positioning ball, a worm wheel is meshingly connected to the outer contour of the bottom end of the worm, and the worm wheel is passed through and fixedly connected to the positioning frame.

[0008] Preferably, a cylinder is fixedly connected to the inner contour of the positioning frame, a push rod is sleeved inside the cylinder, and a through groove is provided inside the push rod, which is downwardly conductive and compatible with the screw-in mechanism.

[0009] Preferably, the screw-in mechanism includes a fixed cylinder fixedly connected to the bottom end of the cylinder, vertical grooves are provided on both sides of the fixed cylinder near the inner contour of the bottom end, an annular groove is provided on the inner contour of the bottom end of the fixed cylinder, the vertical groove and the annular groove are connected to each other, a push ring is slidably connected to the inner contour of the top end of the fixed cylinder, the push ring is fixedly connected to the bottom end of the push rod, a positioning rod is provided on the inner contour of the push ring, a spiral groove is provided on the outer contour of the positioning rod, a positioning pin is provided at a position corresponding to the spiral groove on the inner contour of the push ring, the bottom end of the positioning rod is fixedly connected to a guide block and the guide block is slidably connected to the inside of the vertical groove.

[0010] Preferably, the screw-in mechanism further comprises a pile rod fixedly connected to the bottom end of the guide block, a positioning ring is fixedly connected to the middle section of the pile rod, a pile barrel is provided on the outer contour of the pile rod and the pile barrel slides inside the fixed barrel.

[0011] Preferably, a non-self-locking thread is provided on the outer contour of the pile barrel, the bottom end of the fixing barrel is fixedly connected to a guide ring screwed to the outer contour thread of the pile barrel, and a trigger sensor is provided inside the ring groove.

[0012] Preferably, the bottom expansion mechanism includes a pile head for realizing ground-breaking operations, the pile head is arranged directly below the guide ring, the top end of the pile head is fixedly connected to a fixing rod, the top end of the fixing rod is fixedly connected to the bottom end of the pile rod, the middle section of the fixing rod is fixedly connected to a fixing ring, and a plurality of eccentric grooves are provided on the fixing ring.

[0013] Preferably, the bottom expansion mechanism also includes an electromagnetic ring fixedly connected to the bottom end of the pile barrel, the electromagnetic ring is controlled by a trigger sensor inside the ring groove to adjust the magnetic strength, the electromagnetic ring is sleeved on the outer contour of the fixed ring, and the bottom of the electromagnetic ring is intermittently adsorbed with a blocking ring, and a plurality of guide grooves are provided on the blocking ring, and a wing pin is slidably provided inside each of the eccentric grooves and the bottom end of the wing pin is slidably connected to the inside of the guide groove, and the number of the guide grooves is consistent with that of the wing pins.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention realizes free control of the driving angle of the pile body by setting an angle mechanism. By driving the pile body obliquely, the seismic performance thereof is limitedly improved while the depth of the pile body inserted into the ground can be freely controlled.

[0015] The present invention adjusts the driving method of the pile body to a screw-in type by providing a screw-in mechanism. Compared with the direct press-in method, the grounding method of threaded screw-in can effectively improve the anchoring strength and seismic stability of the device.

[0016] The present invention provides a bottom expansion mechanism. After the pile body is fully driven in, the wing pin automatically extends to increase the bearing area of the pile end, further improving the pull-out strength of the pile body. At the same time, its automated expansion and contraction process effectively reduces the operational difficulty when driving in and out of the pile body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 This is a cross-sectional view of the main structure of the present invention; Figure 3 This is a schematic diagram of the lifting rod of the present invention; Figure 4 This is a schematic diagram of the angle mechanism of the present invention; Figure 5 is a cross-sectional view of the grounding assembly of the present invention; Figure 6 It is a schematic diagram of the screw-in mechanism of the present invention; Figure 7 This is a schematic diagram of the screw-in mechanism connection of the present invention; Figure 8 This is a schematic diagram of the connection of the bottom expansion mechanism of the present invention; Figure 9 This is an exploded view of the bottom expansion mechanism of the present invention.

[0018] In the figure: 1. lifting rod; 11. positioning ball; 12. positioning frame; 13. power structure; 2. bracket; 21. worm; 22. worm gear; 3. cylinder; 31. push rod; 32. through groove; 4. fixing cylinder; 41. vertical groove; 42. ring groove; 43. push ring; 44. push rod; 45. spiral groove; 46. positioning pin; 47. guide block; 5. pile rod; 51. positioning ring; 52. pile barrel; 53. guide ring; 6. pile head; 61. fixing rod; 62. fixing ring; 63. eccentric groove; 64. electromagnetic ring; 65. blocking ring; 66. guide groove; 67. wing pin. DETAILED DESCRIPTION

[0019] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] Example 1:

[0021] See also Figures 1 to 9 The present invention provides a technical solution: a composite grounding device for an electric grounding system, comprising a lifting rod 1, a grounding assembly, and an angle mechanism. The lifting rod 1 is provided with two groups, and the top ends of the two groups of lifting rods 1 are both connected to positioning balls 11 for limited rotation. The opposite surfaces of the two positioning balls 11 are penetrated by a common positioning frame 12. A power structure 13 is provided on one side of the positioning frame 12, and the orientation of the two lifting rods 1 is parallel to the structural surface of the power structure 13. The grounding assembly includes a screw-in mechanism for driving the pile body and a bottom-expanding mechanism for expanding the bearing area of the pile end.

[0022] The inner contour of the positioning frame 12 is fixedly connected to a cylinder 3 , the interior of the cylinder 3 is sleeved with a push rod 31 , and the interior of the push rod 31 is provided with a through slot 32 that is open downwards and adapted to the screw-in mechanism.

[0023] In this solution, the power structure 13 is used to simulate the power system to be grounded. The two lifting rods 1 adjust the overall height of the device, thereby controlling the depth of the pile body driven into the ground. The angle mechanism is manually adjusted to make the positioning frame 12 and the positioning ball 11 rotate synchronously. At this time, the grounding component as a whole rotates synchronously with the positioning frame 12 to realize the control of the pile body driving angle.

[0024] Furthermore, after the angle mechanism is adjusted, the grounding assembly starts to work. At this time, the bottom expansion mechanism is pressed into the ground and completes the groundbreaking operation. At the same time, the screw-in mechanism rotates synchronously in the process of penetrating into the ground, and the pile driving method is adjusted to a screw-in type. By rotating and cutting into the soil layer, a tight mechanical interlocking is formed with the soil, thereby effectively improving the anchoring strength of the device. At the same time, the screw-in type cutting can disperse the upward pull and horizontal force generated by the earthquake, further reducing the risk of the pile coming out, and the rotary cutting method causes less damage to the surrounding soil structure and can effectively maintain the original bearing capacity of the surrounding soil.

[0025] When the device penetrates to the maximum depth, that is, the screw-in mechanism reaches the predetermined insertion depth, the bottom expansion mechanism starts to work. The bottom expansion mechanism causes the wing pins at the pile head to expand and push the underlying soil to increase the bearing area of the pile end, effectively improving the pull-out strength of the device. At the same time, during the piling process, the wing pins always remain in a retracted state, thereby effectively reducing the penetration resistance of the pile body during the piling process.

[0026] To use this device, place the two lifting rods 1 on the ground on the side of the power structure 13 to be grounded. Adjust the position of the two lifting rods 1 so that the line connecting them is parallel to the surface of the power structure 13. At this point, the entire grounding assembly is also parallel to the surface of the power structure 13 and perpendicular to the ground. Because the cylinder 3 and push rod 31 form a hydraulic rod structure, when piling is required, hydraulic oil is injected into the cylinder 3, and the push rod 31 gradually extends from the cylinder 3, driving the entire grounding assembly to move synchronously, completing the piling operation.

[0027] It should be noted that when the two lifting rods 1 are raised and lowered synchronously, the height of the grounding assembly from the ground can be controlled. At this time, the adjustment process of the angle mechanism controls the bottom end of the grounding assembly to tilt towards or away from the power structure 13; and when the two lifting rods 1 are raised and lowered asynchronously, that is, one lifting rod 1 rises while the other lifting rod 1 does not move or falls, the two lifting rods 1 also adjust the tilt direction of the grounding assembly. The bottom end of the grounding assembly tilts towards the lifting rod 1 on the rising side. Figure 3 For example, the connection direction of the two lifting rods 1 is defined as the horizontal transverse direction, and the power structure 13 is placed on one side of the horizontal longitudinal direction. At this time, the two lifting rods 1 are raised and lowered asynchronously, and the inclination direction of the grounding component in the horizontal transverse direction changes synchronously. Then, the angle mechanism further controls the inclination direction of the grounding component in the horizontal longitudinal direction, thereby realizing free control of the angle and direction of the pile body during the piling operation.

[0028] Example 2:

[0029] See also Figure 4This embodiment further explains on the basis of the first embodiment: the angle mechanism includes a bracket 2 fixedly connected to the upper surface of one of the positioning balls 11, and a worm 21 is penetrated at the end of the bracket 2 away from the positioning ball 11, and a worm wheel 22 is meshingly connected to the outer contour of the bottom end of the worm 21, and the worm wheel 22 is penetrated and fixedly connected to the positioning frame 12.

[0030] It can be seen from Example 1 that the screw-in mechanism controls the inclination angle of the grounding component in the horizontal and longitudinal directions. When the screw-in mechanism needs to be adjusted, the worm 21 is manually rotated. At this time, the worm 21 drives the worm wheel 22 and the positioning frame 12 to rotate as a whole. The rotation of the positioning frame 12 further drives the cylinder 3 and the push rod 31 fixedly connected on its inner contour to tilt. Since the grounding component is fixedly connected to the bottom end of the cylinder 3, the grounding component tilts synchronously and the inclination angle is limited by the rotation angle of the positioning frame 12, and the inclination angle of the grounding component is controlled by rotating the worm 21.

[0031] It should be noted that when the grounding component is tilted, the positioning frame 12 tends to reset due to the influence of the grounding component's own weight. At this time, the positioning frame 12 wants to drive the worm wheel 22 to deflect back to the initial state, but because the transmission relationship between the worm wheel 22 and the worm 21 is self-locking, that is, the worm wheel 22 cannot drive the worm 21 to move, the worm wheel 22 is restricted by the worm 21 and cannot reset, so that the grounding component continues to maintain a tilted state to avoid angular deviation during the piling process.

[0032] Compared with vertical insertion, the method of inserting piles into the ground soil at an angle has significantly improved seismic performance and anchoring strength. When the inclined pile is loaded, its inclined direction will squeeze the soil in front to form a passive earth pressure zone, while the soil behind provides additional constraints to form a three-dimensional resistance system; when horizontal seismic force acts on the inclined pile, the force can be decomposed into two components: axial component and vertical component. The axial component is borne by the axial compressive / tensile strength of the pile, and the vertical component is resisted by the pile-soil friction and passive earth pressure. When a straight pile is subjected to lateral force, it only relies on the bending stiffness of the pile body and the lateral resistance of the shallow soil, and is prone to bending deformation or root fracture. Therefore, compared with straight piles, inclined piles can withstand greater lateral bearing capacity to resist lateral loads in earthquakes, and inclined piles transmit loads through axial components, which can significantly reduce the bending stress of the pile body and avoid pile fracture.

[0033] It should be noted that the inclination angle of the pile body needs to be controlled within the range of 10-30 degrees. When the inclination angle is less than 10 degrees, the axial component after the decomposition of the horizontal load is insufficient, and the improvement in the ability to resist lateral displacement is limited. When the inclination angle is greater than 30 degrees, it may cause stress concentration at the pile-soil interface and cause local soil failure. Therefore, the inclination angle range of the pile body needs to be limited to 10-30 degrees. The range of 10-20 degrees can optimally stimulate passive earth pressure and resist lateral displacement. The range of 20-30 degrees can enhance pullout resistance and is suitable for liquefied soil or tall structures. In actual use, the specific angle needs to be determined by combining finite element analysis and field tests.

[0034] Example 3:

[0035] See also Figure 5-Figure 7 , this embodiment is further explained on the basis of the second embodiment: the screw-in mechanism includes a fixed cylinder 4 fixedly connected to the bottom end of the cylinder 3, and the fixed cylinder 4 is provided with vertical grooves 41 on both sides of the inner contour near the bottom end, and an annular groove 42 is provided on the inner contour of the bottom end of the fixed cylinder 4, and the vertical groove 41 and the annular groove 42 are communicated with each other. A push ring 43 is slidably connected to the inner contour of the top end of the fixed cylinder 4, and the push ring 43 is fixedly connected to the bottom end of the push rod 31, and a positioning rod 44 is provided on the inner contour of the push ring 43, and a spiral groove 45 is provided on the outer contour of the positioning rod 44, and a positioning pin 46 is provided on the inner contour of the push ring 43 at a position corresponding to the spiral groove 45, and the bottom end of the positioning rod 44 is fixedly connected to a guide block 47, and the guide block 47 is slidably connected to the inside of the vertical groove 41.

[0036] The screw-in mechanism also includes a pile rod 5 fixedly connected to the bottom end of the guide block 47 , a positioning ring 51 fixedly connected to the middle section of the pile rod 5 , a pile tube 52 is provided on the outer contour of the pile rod 5 and the pile tube 52 slides inside the fixing tube 4 .

[0037] The outer contour of the pile tube 52 is provided with a non-self-locking thread. The bottom end of the fixing tube 4 is fixedly connected with a guide ring 53 screwed to the outer contour of the pile tube 52 . A trigger sensor is provided inside the annular groove 42 .

[0038] It can be seen from Example 1 that after the angle mechanism is adjusted, the grounding assembly starts to work. At this time, the oil inlet of the cylinder 3 increases, and the push rod 31 extends downward from the inside of the cylinder 3 along its axis and drives the grounding assembly as a whole to move synchronously. Since the fixed cylinder 4 is fixedly connected to the bottom end of the cylinder 3, that is, the fixed cylinder 4 is always in a fixed state, the push rod 31 pushes the push ring 43 to slide synchronously inside the fixed cylinder 4; further, the push ring 43 and the positioning rod 44 are connected by the spiral groove 45 and the positioning pin 46 to achieve transmission connection, that is, the push ring 43 slides synchronously with the positioning rod 44 inside the fixed cylinder 4. At this time, the guide block 47 moves synchronously with the positioning rod 44 and slides along the opening direction of the vertical slot 41. The guide block 47 further pushes the pile rod 5 and the bottom expansion mechanism to extend downward as a whole, and the bottom expansion mechanism contacts the ground and completes the groundbreaking operation.

[0039] During the process of the pile rod 5 extending downward along its axis along with the guide block 47, the pile rod 5 drives the pile barrel 52 to move synchronously through the positioning ring 51, that is, the pile barrel 52 is synchronously extended from the inside of the fixed barrel 4, and the guide ring 53 is in a fixed state along with the fixed barrel 4, that is, during the process of the pile barrel 52 extending, its threaded connection position with the guide ring 53 changes synchronously. Due to the setting of the non-self-locking thread on the outer contour of the pile barrel 52, its helix angle is greater than the friction angle, that is, the threaded connection relationship between the pile barrel 52 and the guide ring 53 does not have self-locking properties. At this time, the extension of the pile barrel 52 will cause it to start rotating synchronously.

[0040] As the bottom expansion mechanism breaks the ground, the pile barrel 52 is gradually inserted into the ground. At this time, the spiral extension of the pile barrel 52 will cause it to form a threaded relationship with the soil. The pile barrel 52 cuts into the soil layer by rotation, forming a tight mechanical interlock with the soil, thereby effectively improving the anchoring strength of the pile body; at the same time, the spiral surface of the pile barrel 52 thread can effectively disperse the upward pull and horizontal forces generated by the earthquake, further reducing the risk of disengagement; and the rotational cutting method of the pile barrel 52 causes less damage to the surrounding soil structure, which can enable the surrounding soil to maintain its original bearing capacity, while its piling deployment speed is also faster than the direct press-in method.

[0041] When the guide block 47 descends along the vertical groove 41 to the position of the annular groove 42, the push rod 31 has not yet reached the limit telescopic position, that is, the push rod 31 continues to extend from the inside of the cylinder 3, and continues to push the push ring 43 to descend, but at this time the guide block 47 can no longer continue to descend, resulting in the height of the positioning rod 44 being locked, that is, at this time, under the cooperative transmission of the spiral groove 45 and the positioning pin 46, the descent of the push ring 43 further causes the positioning rod 44 and the guide block 47 to rotate, and the guide block 47 rotates inside the annular groove 42, and the push rod 31 pushes the push ring 43 to descend so that the positioning rod 44 enters the through groove 32, thereby avoiding the movement of the push rod 31 from interfering with the positioning rod 44. At this time, the positioning pin 46 slides downward in the spiral groove 45 until it reaches the limit position; the guide block 47 further drives the pile rod 5 and the bottom expansion mechanism to rotate synchronously as a whole, and the bottom expansion mechanism rotates and begins to extend to increase the bearing area of the pile end.

[0042] When the guide block 47 is in the corresponding position with the vertical groove 41, the guide block 47 and the positioning rod 44 start to rise synchronously with the cylinder 3 and the push ring 43. In other words, during the pile removal process, the bottom expansion mechanism first shrinks and resets, and then starts the pile removal operation, thereby effectively reducing the resistance of the pile body during the pile driving and pile removal process to reduce the difficulty of the operation.

[0043] On the other hand, the rotation of the pile barrel 52 is limited by the change of the screw connection position relationship between the pile barrel 52 and the guide ring 53, that is, the pile barrel 52 will rotate only when the extension degree of the pile barrel 52 inside the fixed barrel 4 changes, and the extension degree of the pile barrel 52 inside the fixed barrel 4 is limited by the lifting and lowering movement of the guide block 47, that is, the pile barrel 52 will start to rotate only when the guide block 47 is lifted and lowered, and the rotation direction of the pile barrel 52 is opposite during the rising and falling process of the guide block 47. When the guide block 47 is lowered, the pile barrel 52 rotates to realize the rotational implantation of the pile body. The reverse rotation of the pile barrel 52 during the rise realizes the auxiliary pile removal; it can be seen that when the guide block 47 rotates, since its lifting height does not change, and the pile barrel 52 has formed a mechanical interlock with the soil, that is, the pile barrel 52 is in a fixed state. At the same time, since the lifting and lowering of the guide block 47 occurs inside the vertical groove 41, and the rotation of the guide block 47 occurs inside the annular groove 42, when the guide block 47 descends along the vertical groove 41 to the position of the annular groove 42, the trigger sensor of the annular groove 42 sends a signal to the bottom expansion mechanism to cooperate with the automatic extension of the bottom expansion mechanism.

[0044] Since the initial height of the grounding assembly from the ground is controlled by the lifting rod 1 and the angle mechanism, Figure 1 Taking the state shown as an example, the angle mechanism has not yet started working, the grounding assembly is in a vertical state, and its inclination angle is zero; if the bottom end of the grounding assembly just touches the ground, the push rod 31 drives the grounding assembly to extend to complete the piling operation, and the length of the pile body inserted into the ground is the opening length of the vertical groove 41; if the bottom end of the grounding assembly does not touch the ground, the initial height of the grounding assembly from the ground can be controlled by adjusting the lifting height of the lifting rod 1. At this time, the depth of the pile body inserted into the ground is the opening length of the vertical groove 41 minus the initial height of the grounding assembly from the ground. Since the opening length of the vertical groove 41 is a fixed value, the depth of the pile body inserted into the ground can be adjusted by controlling the height of the lifting rod 1.

[0045] Similarly, in the process of adjusting the angle mechanism to control the deflection state of the grounding component, when the grounding component is tilted, its axis, the line parallel to the ground, and the axis perpendicular to the ground in the initial state form a right triangle, and the vertex angle of the right triangle is the tilt angle of the grounding component. Since the pile body always telescopes along the axis of the grounding component, the height of the lifting rod 1 is controlled at this time, and the change in its stroke in the axis direction of the grounding component can be calculated through the trigonometric function formula, thereby equivalently adjusting the depth of the pile body inserted into the ground.

[0046] Example 4:

[0047] The bottom expansion mechanism includes a pile head 6 for realizing ground breaking operation. The pile head 6 is arranged directly below the guide ring 53. The top of the pile head 6 is fixedly connected to a fixing rod 61. The top of the fixing rod 61 is fixedly connected to the bottom end of the pile rod 5. The middle section of the fixing rod 61 is fixedly connected to a fixing ring 62. A plurality of eccentric grooves 63 are provided on the fixing ring 62.

[0048] The bottom expansion mechanism also includes an electromagnetic ring 64 fixedly connected to the bottom end of the pile tube 52. The electromagnetic ring 64 is controlled by a trigger sensor inside the ring groove 42 to adjust the magnetic strength. The electromagnetic ring 64 is sleeved on the outer contour of the fixed ring 62. The bottom of the electromagnetic ring 64 is intermittently adsorbed with a blocking ring 65. A plurality of guide grooves 66 are provided on the blocking ring 65. A wing pin 67 is slidably provided inside each of the eccentric grooves 63, and the bottom end of the wing pin 67 is slidably connected to the inside of the guide groove 66. The number of the guide grooves 66 and the number of the wing pins 67 are consistent.

[0049] It can be seen from Example 3 that when the guide block 47 descends along the vertical groove 41 to the position of the annular groove 42, the pile body reaches the predetermined insertion depth and the trigger sensor of the annular groove 42 sends a signal to the electromagnetic ring 64. After that, the pile barrel 52 is in a fixed state during the rotation of the guide block 47 in the annular groove 42, and the electromagnetic ring 64 synchronously accompanies the pile barrel 52 in a fixed state.

[0050] It should be noted that the electromagnetic ring 64 is not energized and is in a non-magnetic state at the beginning. During this process, the guide block 47 descends along the vertical slot 41, and the electromagnetic ring 64 rotates and extends synchronously with the pile barrel 52, while the blocking ring 65 moves synchronously with the bottom expansion mechanism and the pile rod 5, and there is no motion interference between it and the electromagnetic ring 64; and when the guide block 47 descends along the vertical slot 41 to the annular slot 42, the electromagnetic ring 64 receives the signal from the trigger sensor of the annular slot 42 and is energized to generate strong magnetism. At this time, the electromagnetic ring 64 produces an adsorption effect on the blocking ring 65. Since the electromagnetic ring 64 is in a fixed state along with the pile barrel 52 at this time, the blocking ring 65 is also in a fixed state due to the effect of magnetic connection.

[0051] Similarly, during the pile removal process, the guide block 47 first rotates in the opposite direction along the annular groove 42 to complete the reset. During this process, the blocking ring 65 is in a fixed state along with the electromagnetic ring 64 and the pile barrel 52; and when the guide block 47 begins to rise along the vertical groove 41, it breaks away from the contact with the annular groove 42, causing the trigger sensor on the annular groove 42 to stop responding, and the electromagnetic ring 64 returns to the power-off state, and its magnetism disappears, causing the blocking ring 65 to be released from the fixed state.

[0052] Furthermore, when the guide block 47 rotates in the annular groove 42, it drives the pile rod 5, the fixed rod 61, the fixed ring 62 and the pile head 6 to rotate synchronously. At this time, the fixed ring 62 drives the eccentric groove 63 to rotate, and the orientation of the wing pin 67 is restricted by the guide groove 66. The guide groove 66 is in a fixed state with the blocking ring 65. That is, under the rotation of the eccentric groove 63, the wing pin 67 slides relatively inside the eccentric groove 63. Since the eccentric groove 63 gradually moves away from the center of the fixed ring 62 along its starting direction, when its rotation causes the wing pin 67 to slide relatively inside it, the position of the wing pin 67 The wing pin 67 is synchronously moved away from the center of the fixed ring 62. During this process, the wing pin 67 gradually extends outward along the opening direction of the guide groove 66, so that the expansion process of the wing pin 67 is realized by the rotation of the guide block 47. When the wing pin 67 is expanded, it gradually inserts into the soil layer around the pile head 6, thereby increasing the contact area between the pile end and the soil layer to improve the pull-out strength of the pile body; at the same time, during the rotation and reset process of the guide block 47 along the annular groove 42, the wing pin 67 is synchronously retracted back into the guide groove 66, so that the pile end returns to the retracted state, and then the pile removal operation is started to avoid the resistance of the bottom expansion mechanism affecting the pile driving and removal process.

[0053] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A composite grounding device for an electric power grounding system, comprising a lifting rod (1), characterized in that: It also includes a grounding component and an angle mechanism, wherein the lifting rods (1) are provided with two groups, and the top ends of the two groups of lifting rods (1) are connected to positioning balls (11) for limited rotation, and the opposite surfaces of the two positioning balls (11) are penetrated by a common positioning frame (12), and a power structure (13) is provided on one side of the positioning frame (12), and the orientation of the two lifting rods (1) is parallel to the structural surface of the power structure (13); The grounding assembly includes a screw-in mechanism for driving the pile body and a bottom-expanding mechanism for expanding the bearing area of the pile end.

2. A composite grounding device for a power grounding system according to claim 1, characterized in that: The angle mechanism comprises a bracket (2) fixedly connected to the upper surface of one of the positioning balls (11); a worm (21) is passed through the end of the bracket (2) away from the positioning ball (11); a worm wheel (22) is meshingly connected to the outer contour of the bottom end of the worm wheel (21); and the worm wheel (22) is passed through and fixedly connected to the positioning frame (12).

3. The composite grounding device for a power grounding system according to claim 1, characterized in that: A cylinder (3) is fixedly connected to the inner contour of the positioning frame (12), a push rod (31) is sleeved inside the cylinder (3), and a through groove (32) is provided inside the push rod (31) that is open downward and adapted to the screw-in mechanism.

4. A composite grounding device for a power grounding system according to claim 1, characterized in that: The screw-in mechanism comprises a fixed cylinder (4) fixedly connected to the bottom end of the cylinder (3), vertical grooves (41) are provided on both sides of the inner contour of the fixed cylinder (4) close to the bottom end, an annular groove (42) is provided on the inner contour of the bottom end of the fixed cylinder (4), the vertical groove (41) and the annular groove (42) are communicated with each other, a push ring (43) is slidably connected to the inner contour of the top end of the fixed cylinder (4), the push ring (43) is fixedly connected to the bottom end of the push rod (31), a positioning rod (44) is provided on the inner contour of the push ring (43), a spiral groove (45) is provided on the outer contour of the positioning rod (44), a positioning pin (46) is provided at a position corresponding to the spiral groove (45) on the inner contour of the push ring (43), the bottom end of the positioning rod (44) is fixedly connected to a guide block (47), and the guide block (47) is slidably connected to the inside of the vertical groove (41).

5. A composite grounding device for a power grounding system according to claim 4, characterized in that: The screw-in mechanism further comprises a pile rod (5) fixedly connected to the bottom end of the guide block (47), a positioning ring (51) fixedly connected to the middle section of the pile rod (5), a pile tube (52) provided on the outer contour of the pile rod (5), and the pile tube (52) slides inside the fixing tube (4).

6. A composite grounding device for a power grounding system according to claim 5, characterized in that: The outer contour of the pile barrel (52) is provided with a non-self-locking thread, the bottom end of the fixed barrel (4) is fixedly connected to a guide ring (53) threadedly connected to the outer contour of the pile barrel (52), and a trigger sensor is provided inside the annular groove (42).

7. The composite grounding device for a power grounding system according to claim 1, characterized in that: The bottom expansion mechanism comprises a pile head (6) for realizing a ground-breaking operation, the pile head (6) being arranged directly below the guide ring (53), the top end of the pile head (6) being fixedly connected to a fixing rod (61), the top end of the fixing rod (61) being fixedly connected to the bottom end of the pile rod (5), the middle section of the fixing rod (61) being fixedly connected to a fixing ring (62), and the fixing ring (62) being provided with a plurality of eccentric grooves (63).

8. A composite grounding device for a power grounding system according to claim 7, characterized in that: The bottom expansion mechanism also includes an electromagnetic ring (64) fixedly connected to the bottom end of the pile tube (52), and the electromagnetic ring (64) is controlled by a trigger sensor inside the ring groove (42) to adjust the magnetic strength. The electromagnetic ring (64) is sleeved on the outer contour of the fixed ring (62), and a blocking ring (65) is intermittently adsorbed on the bottom of the electromagnetic ring (64). A plurality of guide grooves (66) are provided on the blocking ring (65), and a wing pin (67) is slidably provided inside each of the eccentric grooves (63), and the bottom end of the wing pin (67) is slidably connected to the inside of the guide groove (66). The number of the guide grooves (66) and the number of the wing pins (67) are the same.

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