A safety grounding device and a method of using the same

Abstract

A safety grounding device and a method for using the same relate to a safety grounding device, comprising a manual ratchet mechanism, a grounding hook, a connecting assembly, an insulating rod and a grounding shoe assembly and a grounding wire, wherein the insulating rod is arranged in sections, the connecting assembly is fixed on the insulating rod section near the grounding hook end, the grounding shoe assembly is fixed on a steel rail on the ground through a manual ratchet mechanism, a grounding wire is connected between the grounding hook at the upper end of the insulating rod and the grounding shoe assembly, and the connecting assembly and the grounding shoe assembly are interlocked by a key; the use of the connecting assembly meets the length requirement of the insulating rod and is convenient for hanging the wire, and the key is always in the connecting assembly and cannot be taken out during the interlocking process, and the connecting assembly and the grounding shoe assembly are interlocked at the same time during the operation to complete the grounding operation, thereby effectively ensuring the safety of the operation; the invention has a compact structure and is easy to use, and avoids damage caused by incorrect use or negligence during power-off maintenance.

Description

Technical Field

[0001] The invention relates to a safety grounding device, in particular to a safety grounding device and a use method thereof. Background Art

[0002] It is well known that in order to ensure the safe and stable operation of railway transportation, the equipment needs to be inspected and maintained regularly, or the power must be turned off for inspection in case of emergencies. Before each power outage for inspection, it is necessary to hang a grounding wire to prevent personal injury caused by working without powering off, static electricity on high-voltage lines, or erroneous power supply on lines that have already been powered off. However, the existing ordinary grounding devices do not have the interlocking control logic function during use. If they are used incorrectly or negligently, such as hanging the grounding hook first and then installing the grounding shoe, or removing the grounding shoe first without removing the grounding hook, high voltage electricity or static electricity will also seriously endanger the life safety of the operators. Summary of the invention

[0003] In order to overcome the deficiencies in the background technology, the present invention discloses a safety grounding device and a method for using the same.

[0004] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical scheme: A safety grounding device comprises a manual ratchet mechanism, a grounding hook, a connecting assembly, an insulating rod and a grounding shoe assembly and a grounding wire. The insulating rod is arranged in sections. The connecting assembly is fixed on the insulating rod section close to the grounding hook end. The grounding shoe assembly is fixed on the steel rail on the ground through the manual ratchet mechanism. A grounding wire is connected between the grounding hook at the upper end of the insulating rod and the grounding shoe assembly. The connecting assembly and the grounding shoe assembly are interlocked by a key. The connecting component includes a connecting female head and a connecting male head. A step recessed hole A and a step recessed hole B are respectively provided on the left and right end faces of the connecting female head. A positioning plate and a limit plate are respectively provided in the step recessed hole A and the step recessed hole B. A center hole is provided in the middle between the bottom surfaces of the step recessed hole A and the step recessed hole B. The center hole is a step hole that is successively necked from left to right. A lock core pin is placed in the center hole. A key hole C corresponding to the key hole D at the center of the positioning plate is provided on the left end face of the lock core pin. The right end face passes through the limit plate and is fixedly connected by screws. Two corresponding through holes are provided on both sides of the center hole. Limiting columns are provided in the through holes. The right end of the limiting column contacts the inner end face of the limiting column. The connecting male head is in a stepped cylindrical shape. The step is a threaded section. The connecting male head is fixedly connected to the internal thread of the step recessed hole A of the connecting female head through the threaded section, and the contact annular surface on the end face of the threaded section contacts the outer end face of the limiting column.

[0005] The safety grounding device described herein has a step hole of a center hole with three steps, a compression spring is arranged in the step hole of the second step, the lock core pin in the center hole is a step shaft, the large diameter section is located in the first step hole on the left side, and the square seat at the end of the small diameter section passes through the second and third step holes in sequence and is arranged in the square hole of the limit plate, and the screws are fixed in the screw holes in the square seat.

[0006] The safety grounding device comprises a first step hole, a second step hole, and a third step hole which are connected in sequence from left to right, wherein the diameter of the second step hole is smaller than the diameters of the first step hole and the third step hole; the limiting column comprises a sleeve and a long screw, the left end of the long screw is threadedly connected to the screw hole of the sleeve, the right end nut end of the long thread is arranged in the third step hole, and the diameter is larger than the diameter of the second step hole, a compression spring is sleeved in the first step hole and on the long thread, and the left end of the sleeve passes through the holes on the positioning plate and is arranged in the step recess A.

[0007] The safety grounding device is symmetrically provided with two countersunk holes along the circumferential direction of the circumferential surface of the positioning plate, and the positioning plate is fixed to the bottom surface of the stepped recessed hole A by countersunk screws arranged in the countersunk holes.

[0008] The safety grounding device has two arc grooves symmetrically arranged along the outer circumferential surface of the limit plate, an arc guide hole is opened along the circumferential surface of the limit plate, a guide column is fixed in the guide hole opened on the bottom surface of the step recessed hole B, and the guide column is inserted into the guide hole.

[0009] The safety grounding device described herein comprises a grounding shoe assembly including a grounding block, a grounding hook and an interlocking piece, wherein the grounding hook is fixed to the lower part of the rail, the interlocking piece is located on one side of the upper part of the manual ratchet mechanism, a sliding block connected by a connecting rod is provided between the interlocking piece and the connecting shaft on the handle of the manual ratchet mechanism, studs connected to the grounding block are provided on both sides of the lower part of the interlocking piece, springs are sleeved on the outside of the studs, the open end of the grounding block is clamped on the rail, locking nuts are provided at both ends of the studs, a vertically arranged keyhole blocking column is fixed to the outside of the locking nut located on one side of the interlocking piece, the keyhole blocking column is located in the interlocking piece and is arranged correspondingly to the keyhole A on the interlocking piece up and down.

[0010] The safety grounding device, the interlocking parts include a locking body, a connecting support block, a base plate, a lock tongue, a lock core and a lock hole blocking column. The connecting support block is set on the gear seat of the manual ratchet mechanism through the recessed surface at the bottom, and is fixed to the gear seat by the countersunk screws in the countersunk screw holes on the connecting support block. Through holes A and through holes B are respectively opened at the lower parts of both sides of the connecting support block. One end of the two studs is fixedly connected to the inner end surface of the grounding block, and the other ends pass through through holes A and through holes B respectively and are slidably connected to the connecting support block and are locked by nuts. The locking body is fixedly connected to the connecting hole C on the outer step surface of the connecting support block through the connecting bolts in the connecting holes A of the two arms.

[0011] The safety grounding device described herein has a locking body in the shape of an "n". A through groove A and a through groove B are respectively provided between the two sides and the two arms below the locking body. The through groove B is slidably matched with the slider, and the through groove A is slidably matched with the lock hole blocking column. A step is provided below the middle of the locking body. The mounting holes B on the upper and lower sides of the step are respectively provided corresponding to the mounting holes A on the bottom plate. A concave hole for placing a lock core is provided on the upper side of the step. A key hole A is provided between the bottom surface of the concave hole and the upper side of the locking body. The key hole A and the key hole B on the lock core are provided correspondingly up and down. A pressure block is provided on one side of the upper side of the bottom plate. Mounting holes A are provided on both sides of the pressure block, and correspond to the mounting holes A on the bottom plate. The width of the pressure block is smaller than the width of the bottom plate, and a step for placing the lock tongue is formed between the pressure block and the bottom plate. A rotation groove is provided on one side of the lock tongue, and a convex column is fixed near the edge of the bottom surface of the lock cylinder. The convex column is slidably set in the rotation groove. A groove for passing the lock tongue is provided in the middle part under the slider. The slider is set on the upper side of the bottom plate. The mounting holes A on the bottom plate and the pressure block are connected to the corresponding mounting holes B on the bottom of the step by bolts, and the mounting holes B on the top of the step are connected to the corresponding mounting holes A on the bottom plate by bolts.

[0012] The safety grounding device described herein comprises a keyhole blocking column comprising a fixed column and a keyhole blocking plate, the lower end of the fixed column being fixed on a locking nut connected to a stud on the outer end surface of the support block, the keyhole blocking plate being horizontally fixed on the upper end of a vertically arranged fixed column, and the keyhole blocking plate being located directly above the keyhole B.

[0013] A method for using a safety grounding device specifically comprises the following steps: Step a: clamp the hook end of the grounding hook on one side of the rail, hold the manual ratchet mechanism by hand, shake the handle to drive the pawl on the manual ratchet mechanism to turn the ratchet, the ratchet is meshed with the teeth on the rack, and the ratchet seat is driven to move on the rack, so that the grounding block gradually approaches the rail. During the process of the bayonet on the grounding block and the rail being in contact and clamped, the connecting support block moves toward the grounding block. At this time, the spring is compressed, the stud and the lock hole blocking column are stationary, and come out of the through slot A of the moving locking body, so that the lock hole baffle of the lock hole blocking column no longer blocks the key hole B on the lock core; Step b: The key is in the keyhole A and rotated 180° to the removal position. At this time, the convex column at the bottom of the lock core slides in the rotation groove, so that the lock tongue moves toward the slider and is inserted into the groove under the slider. The handle of the manual ratchet mechanism is limited, and the key can be removed; Step c: insert the taken out key into the keyhole D of the positioning disk on the female connector and the keyhole C of the lock core pin in sequence, turn the key to drive the lock core pin and the limit disk to rotate, so that the arc groove on the limit disk corresponds to the two limit columns, screw the threaded section of the male connector into the stepped recessed hole A, and the contact annular surface on the threaded section is pressed on the edge of the outer end of the sleeve of the two limit columns. While screwing in, the two limit columns extend out of the arc groove, and the key is retained in the female connector and is no longer taken out. Due to the increase in the height of the entire insulating rod, the use requirements are met, and the grounding hook can be hung on the high-voltage line to complete the operation process; Step d: When the interlock needs to be released, remove the grounding hook from the high-voltage line, rotate the threaded section of the male connector in the opposite direction, separate the male connector from the female connector, and the two limit posts withdraw from the arc groove under the reaction force of the compression spring and return to the original state. Rotate the key in the opposite direction to the key removal position. At this time, the lock core pin and the limit plate rotate so that the arc groove on the limit plate no longer corresponds to the two limit posts, and the key can be pulled out; Step e: Insert the key into keyhole A and keyhole B from top to bottom in sequence, and rotate the key in the opposite direction. The convex column is eccentrically set relative to the bottom surface of the lock core. The convex column on the bottom surface of the lock core drives the rotating groove to move the lock tongue and exit the groove under the slider. The handle limit can be released, and the handle is pressed down in the opposite direction. At the same time, the pawl disengages from the ratchet. Pull the handle to one side to drive the ratchet seat and the grounding block to move together, so that the grounding block is disengaged from the rail. At the same time, the lock hole blocking column enters the through groove A of the locking body to block the keyhole B on the lock core. At this time, the key cannot be taken out, and the grounding shoe assembly is removed from the rail to complete the unlocking process.

[0014] Due to the adoption of the above technical solution, the present invention has the following beneficial effects: The safety grounding device and the method of using the same described in the present invention, the connection assembly and the grounding shoe assembly are interlocked with only one key, the use of the connection assembly meets the length requirement of the insulating rod, and is convenient for hanging wires; during the interlocking process, the key is always in the connection assembly and cannot be taken out, and during the operation, the connection assembly and the grounding shoe assembly must be interlocked at the same time to complete the grounding operation, effectively ensuring the safety of the operation; the present invention has a compact structure and is easy to use, avoiding damage caused by incorrect or negligent use during power-off maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a structural schematic diagram of the grounding assembly of the present invention.

[0017] Figure 3 It is a schematic diagram of the installation structure of the grounding shoe assembly of the present invention on the manual ratchet mechanism.

[0018] Figure 4It is a schematic diagram of the internal structure of the grounding shoe assembly of the present invention.

[0019] Figure 5 It is a schematic diagram of the connection structure of the handle and the grounding shoe assembly of the present invention.

[0020] Figure 6 It is a structural schematic diagram of the connection support block of the present invention.

[0021] Figure 7 It is a structural schematic diagram of the lock core of the present invention.

[0022] Figure 8 It is a structural schematic diagram of the connecting female head of the present invention.

[0023] Fig. 9 It is a schematic diagram of the internal structure of the female connector of the present invention.

[0024] Fig.10 It is an exploded schematic diagram of the female connector of the present invention.

[0025] Fig.11 It is a structural schematic diagram of the connecting male head of the present invention.

[0026] Fig.12 It is a schematic structural diagram of the limiting column of the present invention.

[0027] In the figure: 1. Connecting female connector; 2. Insulating rod; 3. Grounding wire; 4. Rail; 5. Connecting male connector; 6. Manual ratchet mechanism; 7. Rack; 8. Through slot A; 9. Keyhole A; 10. Lock body; 11. Connecting rod; 12. Spring; 13. Grounding block; 14. Grounding hook; 15. Lock hole baffle; 16. Lock core; 17. Slider; 18. Bottom plate; 19. Connecting bolt; 20. Stud; 21. Fixing column; 22. Mounting hole A; 23. Rotating groove; 24. Lock tongue; 25. Connecting support block; 26. Upper step surface; 27. Lower step surface; 28. Connecting hole A; 29. ​​Concave hole; 30. Through slot B; 31. Mounting hole B; 32. Countersunk screw hole; 33. Screw hole; 34. Step surface; 35. Through hole A; 36. Recessed surface; 37, through hole B; 38, keyhole B; 39, boss; 40, connecting shaft; 41, stepped recessed hole A; 42, center hole; 43, through hole; 43.1, first stepped hole; 43.2, second stepped hole; 43.3, third stepped hole; 44, stepped recessed hole B; 45, guide hole; 46, positioning plate; 47, sleeve; 48, compression spring; 49, long screw; 50, limit plate; 51, screw; 52, lock core pin; 53, keyhole C; 54, key; 55, guide column; 56, guide hole; 57, arc groove; 58, square hole; 59, connecting hole B; 60, keyhole D; 61, contact ring surface; 62, threaded section; 63, countersunk hole; 64, pressure block; 65, connecting hole C; 64, lock column. DETAILED DESCRIPTION

[0028] The present invention can be explained in detail by the following examples, and the purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0029] Combined with Figure 1-12 The safety grounding device comprises a manual ratchet mechanism 6, a grounding hook, a connecting assembly, an insulating rod 2, a grounding shoe assembly and a grounding conductor 3. The insulating rod 2 is arranged in sections, and the connecting assembly is fixed on the insulating rod section close to the grounding hook end. The grounding shoe assembly is fixed to the steel rail 4 on the ground through the manual ratchet mechanism 6. The grounding conductor 3 is connected between the upper end of the insulating rod 2 and the grounding shoe assembly. The connecting assembly and the grounding shoe assembly are interlocked by a key 54. As attached Figure 1 As shown, the manual ratchet mechanism 6 is a prior art, and the specific connection structure is not described in detail. Only the connection assembly near the grounding hook end can be used between the segmented insulating rods 2. If it is a multi-segment type, this connection assembly is used near the grounding hook end, and the other two adjacent insulating rod segments can be fixedly connected by the existing connecting parts; the rail 4 is located on the sleeper, and the grounding shoe assembly is stuck on the rail 4 between the two sleepers when in use. The grounding wire 3 is a copper wire, and the two ends are fixedly connected to the connection position of the grounding hook and the grounding shoe by bolts respectively; like Figure 8-12As shown, the connection component includes a connecting female head 1 and a connecting male head 5, and the left and right end faces of the connecting female head 1 are respectively provided with a step recessed hole A41 and a step recessed hole B44, and a positioning plate 46 and a limiting plate 50 are respectively provided on the steps of the bottom surfaces of the step recessed hole A41 and the step recessed hole B44, and a center hole 42 is provided in the middle between the bottom surfaces of the step recessed hole A41 and the step recessed hole B44, and the center hole 42 is a step hole that is successively necked from left to right, and a lock core pin 52 is placed in the center hole 42, and a key hole C53 corresponding to the key hole D60 at the center of the positioning plate 46 is provided on the left end face of the lock core pin 52, and the right end face passes through the limiting plate 50 and is fixedly connected by a screw 51, and two corresponding through holes 43 are provided on both sides of the center hole 42, and a through hole 43 is provided in each through hole 43. The limiting column, the right end of which is in contact with the inner end face of the limiting plate 50; the connecting male head 5 is in a stepped cylindrical shape, the step is a threaded section 62, the connecting male head 5 is fixedly connected to the internal thread of the step recessed hole A41 of the connecting female head 1 through the threaded section 62, and the contact annular surface on the end face of the threaded section 62 is in contact with the outer end face of the limiting column; two countersunk holes 63 are symmetrically arranged along the circumferential direction of the circumferential surface of the positioning plate 46, and the positioning plate 46 is fixed to the bottom surface of the step recessed hole A41 by countersunk screws arranged in the countersunk holes 63; two arc grooves 57 are symmetrically arranged along the outer circumferential surface of the limiting plate 50, an arc-shaped guide hole 56 is opened along the circumferential surface of the limiting plate 50, a guide column 55 is fixed in the guide hole 45 opened on the bottom surface of the step recessed hole B44, and the guide column 55 is penetrated in the guide hole 45; When the connecting female connector 1 and the connecting male connector 5 are connected, an insulating rod segment is passed through the outer hole of the step recessed hole B44, and is fixedly connected by a bolt in the connecting hole B59. The threaded segment 62 of the connecting male connector 5 is tightened in the outer threaded hole of the step recessed hole A41 of the connecting female connector 1. An insulating rod segment is fixed to the lower part of the connecting male connector 5. After the connecting female connector 1 and the connecting male connector 5 are fixed, the length of the entire insulating rod 2 is increased, which is convenient for hanging the grounding wire.

[0030] Specifically, the stepped hole of the center hole 42 has three steps, and a compression spring 48 is provided in the stepped hole of the second step. The lock core pin 52 in the center hole 42 is a stepped shaft, and the large diameter section is located in the first step hole on the left side. The square seat at the end of the small diameter section passes through the second and third step holes in turn and is arranged in the square hole 58 of the limit plate 50, and the screw 51 is fixed in the screw hole in the square seat.

[0031] Specifically, the through hole 43 includes a first step hole 43.1, a second step hole 43.2, and a third step hole 43.3 which are connected in sequence from left to right, wherein the diameter of the second step hole 43.2 is smaller than the diameters of the first step hole 43.1 and the third step hole 43.3; the limiting column includes a sleeve 47 and a long screw 49, the left end of the long screw 49 is threadedly connected to the screw hole of the sleeve 47, the right end nut end of the long thread 49 is arranged in the third step hole 43.3, and its diameter is larger than the diameter of the second step hole 43.2, a compression spring 48 is sleeved in the first step hole 43.1 and on the long thread 49, and the left end of the sleeve 47 passes through the holes on the positioning plate 46 and is arranged in the step recessed hole A4.

[0032] As attached Figure 2-7 As shown, the grounding shoe assembly includes a grounding block 13, a grounding hook 14 and an interlocking piece. The grounding hook 14 is fixed to the lower part of the rail 4. The interlocking piece is located on one side of the upper part of the manual ratchet mechanism 6. A slider 17 connected by a connecting rod 11 is provided between the interlocking piece and the connecting shaft 40 on the handle of the manual ratchet mechanism 6. Studs 20 connected to the grounding block 13 are provided on both sides of the lower part of the interlocking piece. The outer part of the studs 20 are sleeved with springs 12. The open end of the grounding block 13 is clamped on the rail 4. When the studs 20 are close to the grounding block 13, the grounding block 13 is clamped on the upper part of the rail 4. Both ends of the interlocking piece are provided with locking nuts, and a vertically arranged keyhole blocking column is fixed outside the locking nut located on one side of the interlocking piece. The keyhole blocking column is located in the interlocking piece and is arranged corresponding to the keyhole A9 on the interlocking piece up and down; the keyhole blocking column includes a fixed column 21 and a keyhole baffle 15, the lower end of the fixed column 21 is fixed on the locking nut connected to the outer end surface of the support block 25, the keyhole baffle 15 is horizontally fixed on the upper end of the vertically arranged fixed column 21, and the keyhole baffle 15 is located directly above the keyhole B38.

[0033] Specifically, the interlocking component includes a locking body 10, a connecting support block 25, a base plate 18, a lock tongue 24, a lock core 16 and a lock hole blocking column. The connecting support block 25 is set on the gear seat of the manual ratchet mechanism 6 through the recessed surface 36 at the bottom, and is fixed to the gear seat by the countersunk screws in the countersunk screw holes 32 on the connecting support block 25. Through holes A35 and through holes B37 are respectively opened at the lower parts of both sides of the connecting support block 25. One ends of the two studs 20 are fixedly connected to the inner end surface of the grounding block 13, and the other ends pass through the through holes A35 and the through holes B37 respectively to be slidably connected to the connecting support block 25 and are locked by nuts. The locking body 10 is fixedly connected to the connecting hole C65 on the outer step surface 34 of the connecting support block 25 through the connecting bolts 19 in the two-arm connecting holes A28.

[0034] Specifically, the lock body 10 is in an "n" shape, and a through groove A8 and a through groove B30 are respectively provided between the two sides and the two arms of the bottom of the lock body 10, the through groove B30 is slidably matched with the slider 17, and the through groove A8 is slidably matched with the lock hole blocking column. The middle part of the lock body 10 is provided at the bottom, and the mounting holes B31 on the upper 26 and lower 27 of the step are respectively provided corresponding to the mounting holes A22 on the bottom plate 18, and a concave hole 29 for placing the lock core 16 is provided on the upper 26 of the step, and a key hole A9 is provided between the bottom surface of the concave hole 29 and the upper surface of the lock body 10, and the key hole A9 is provided correspondingly to the key hole B38 on the lock core 16; a pressure block 64 is provided on one side of the upper surface of the bottom plate 18, and mounting holes A22 are provided on both sides of the pressure block 64, and correspond to the mounting holes A22 on the bottom plate 18. The width of the pressing block 64 is smaller than that of the bottom plate 18, and a step for placing the lock tongue 24 is formed between the pressing block 64 and the bottom plate 18. A rotation groove 23 is provided on one side of the lock tongue 24. A boss 39 is fixed to the bottom surface of the lock core 16 near the edge, and the boss 39 is slidably arranged in the rotation groove 23. A groove for penetrating the lock tongue 24 is provided in the middle of the lower side of the slider 17. The slider 17 is arranged on the upper side of the bottom plate 18. The mounting holes A22 on the bottom plate 18 and the pressing block 64 are connected to the corresponding mounting holes B31 on the lower side 27 of the step by bolts, and the mounting holes B31 on the upper side 26 of the step are connected to the corresponding mounting holes A22 on the bottom plate 18 by bolts. A recessed groove is provided on the lower bottom surface of the key 54, which cooperates with the lock column 64 in the key hole B38 of the lock core 16, and the lock core 16 is rotated by turning the key 54.

[0035] A method for using a safety grounding device specifically comprises the following steps: Step a: clamp the hook end of the grounding hook 14 on one side of the rail 4, hold the manual ratchet mechanism 6 by hand, shake the handle to drive the pawl on the manual ratchet mechanism 6 to turn the ratchet, the ratchet is meshed with the teeth on the rack 7, and the ratchet seat is driven to move on the rack 7, so that the grounding block 13 gradually approaches the rail 4, and the bayonet on the grounding block 13 is in contact with the rail 4 until it is clamped, and the connecting support block 25 moves toward the grounding block 13. At this time, the spring 12 is compressed, the stud 20 and the lock hole blocking column are stationary, and come out of the through groove A8 of the moving locking body 10, so that the lock hole baffle 15 of the lock hole blocking column no longer blocks the key hole B38 on the lock core 16; Step b: The key 54 is in the keyhole A9 and rotated 180° to the removal position. At this time, the protruding column 39 at the bottom of the lock cylinder 16 slides in the rotating groove 23 to move the lock tongue 24 toward the slider 17 and insert it into the groove below the slider 17. The handle of the manual ratchet mechanism 6 is limited, and the key 54 can be removed; Step c: insert the taken out key 54 into the key hole D60 of the positioning plate 46 on the female connector 1 and the key hole C53 of the lock core pin 52 in sequence, rotate the key 54 90°, drive the lock core pin 52 and the limit plate 50 to rotate, at this time, the arc groove 57 on the limit plate 50 corresponds to the two limit columns, screw the threaded section 62 of the male connector into the step recessed hole A41, and the contact annular surface 61 on the threaded section 62 is pressed on the edge of the outer end of the sleeve 47 of the two limit columns. While screwing in, the two limit columns extend out of the arc groove 57, and the key 54 is retained in the female connector 1 and cannot be taken out. Due to the increase in the height of the entire insulating rod 2, the use requirements are met, and the grounding hook at the upper end of the insulating rod 2 can be hung on the high-voltage line to realize the operation process; Step d: When the interlock needs to be released, remove the grounding hook from the high-voltage line, rotate the threaded section 62 of the male connector 5 in the opposite direction, separate the male connector 5 from the female connector 1, and the two limit posts withdraw from the arc groove 57 under the reaction force of the compression spring 48 and return to the original state. Rotate the key 54 in the opposite direction to reach the key removal position. At this time, the lock core pin 52 and the limit plate 50 rotate so that the arc groove 57 on the limit plate 50 no longer corresponds to the two limit posts, and the key can be pulled out. Step e: Insert the key 54 into the keyhole A9 and the keyhole B38 from top to bottom in sequence, and rotate the key 54 in the opposite direction. The boss 39 is eccentrically arranged relative to the bottom surface of the lock core 16. The boss 39 on the bottom surface of the lock core 16 drives the rotating groove 23 to move the lock tongue 24 and exit the groove under the slider 17. The handle limit can be released, and the handle is pressed down in the opposite direction. At the same time, the pawl is disengaged from the ratchet, and the handle is pulled to one side to drive the ratchet seat and the grounding block 13 to move together, so that the grounding block 13 is disengaged from the rail 4. At the same time, the lock hole blocking column enters the through groove A8 of the locking body 10 to block the keyhole B38 on the lock core 16. At this time, the key 54 cannot be taken out, and the grounding shoe assembly is removed from the rail to complete the operation process.

[0036] When the device is used for the first time, the key needs to be put into the key hole of the grounding shoe assembly during assembly, or a special tool needs to be used to put the key in.

[0037] Parts of the present invention not described in detail are prior art.

[0038] The embodiments selected herein for the purpose of disclosing the invention are currently considered to be suitable, but it should be understood that the invention is intended to include all changes and modifications of the embodiments that fall within the scope of the concept and invention.

Claims

1. A safety grounding device, comprising a manual ratchet mechanism, a grounding hook, a connecting assembly, an insulating rod and a grounding shoe assembly and a grounding wire, characterized in that: The insulating rod is set in sections. The connecting assembly is fixed on the insulating rod section near the grounding hook end. The grounding shoe assembly is fixed on the steel rail on the ground through a manual ratchet mechanism. A grounding wire is connected between the grounding hook at the upper end of the insulating rod and the grounding shoe assembly. The connecting assembly and the grounding shoe assembly are interlocked by a key. The connecting component includes a connecting female head and a connecting male head. A step recessed hole A and a step recessed hole B are respectively provided on the left and right end faces of the connecting female head. A positioning plate and a limit plate are respectively provided in the step recessed hole A and the step recessed hole B. A center hole is provided in the middle between the bottom surfaces of the step recessed hole A and the step recessed hole B. The center hole is a step hole that is successively necked from left to right. A lock core pin is placed in the center hole. A key hole C corresponding to the key hole D at the center of the positioning plate is provided on the left end face of the lock core pin. The right end face passes through the limit plate and is fixedly connected by screws. Two corresponding through holes are provided on both sides of the center hole. Limiting columns are provided in the through holes. The right end of the limiting column contacts the inner end face of the limiting column. The connecting male head is in a stepped cylindrical shape. The step is a threaded section. The connecting male head is fixedly connected to the internal thread of the step recessed hole A of the connecting female head through the threaded section, and the contact annular surface on the end face of the threaded section contacts the outer end face of the limiting column.

2. The safety grounding device according to claim 1 is characterized in that: The stepped hole of the center hole is composed of three steps. A compression spring is arranged in the stepped hole of the second step. The lock core pin in the center hole is a stepped shaft. The large diameter section is located in the first stepped hole on the left. The square seat at the end of the small diameter section passes through the second and third stepped holes in turn and is arranged in the square hole of the limit plate. The screws are fixed in the screw holes in the square seat.

3. The safety grounding device according to claim 1 is characterized in that: The through hole includes a first step hole, a second step hole, and a third step hole which are connected in sequence from left to right, wherein the diameter of the second step hole is smaller than the diameters of the first step hole and the third step hole; the limiting column includes a sleeve and a long screw, the left end of the long screw is connected to the screw hole of the sleeve through a thread, the right end nut end of the long thread is arranged in the third step hole, and the diameter is larger than the diameter of the second step hole, a compression spring is arranged in the first step hole and on the long thread, and the left end of the sleeve passes through the holes on the positioning plate and is arranged in the step recessed hole A.

4. The safety grounding device according to claim 1 is characterized in that: Two countersunk holes are symmetrically arranged along the circumferential direction of the circumferential surface of the positioning plate, and the positioning plate is fixed to the bottom surface of the stepped recessed hole A by countersunk screws arranged in the countersunk holes.

5. The safety grounding device according to claim 1, characterized in that: Two arc grooves are symmetrically arranged along the outer circumferential surface of the limiting disk, an arc guide hole is opened along the circumferential surface of the limiting disk, a guide column is fixed in the guide hole opened on the bottom surface of the step recessed hole B, and the guide column is penetrated in the guide hole.

6. The safety grounding device according to claim 1, characterized in that: The grounding shoe assembly includes a grounding block, a grounding hook and an interlocking piece. The grounding hook is fixed to the lower part of the rail. The interlocking piece is located on the upper side of the manual ratchet mechanism. A sliding block connected by a connecting rod is provided between the interlocking piece and the connecting shaft on the handle of the manual ratchet mechanism. Studs connected to the grounding block are provided on both sides of the lower part of the interlocking piece. Springs are sleeved on the outside of the studs. The open end of the grounding block is clamped on the rail. Locking nuts are provided at both ends of the studs. A vertically arranged keyhole blocking column is fixed to the outside of the locking nut located on one side of the interlocking piece. The keyhole blocking column is located in the interlocking piece and is arranged corresponding to the keyhole A on the interlocking piece up and down.

7. The safety grounding device according to claim 6, characterized in that: The interlocking component includes a locking body, a connecting support block, a base plate, a lock tongue, a lock core and a lock hole blocking column. The connecting support block is set on the gear seat of the manual ratchet mechanism through the recessed surface at the bottom, and is fixed to the gear seat by countersunk screws in the countersunk screw holes on the connecting support block. Through holes A and through holes B are respectively opened at the lower parts of both sides of the connecting support block. One ends of the two studs are fixedly connected to the inner end surface of the grounding block, and the other ends pass through through holes A and through holes B respectively and are slidably connected to the connecting support block and are locked by nuts. The locking body is fixedly connected to the connecting hole C on the outer step surface of the connecting support block through the connecting bolts in the connecting holes A of the two arms.

8. The safety grounding device according to claim 7, characterized in that: The locking body is in the shape of "n", and through grooves A and B are respectively provided between the two sides and the two arms of the lower side of the locking body, and the through groove B is slidably matched with the slider, and the through groove A is slidably matched with the lock hole blocking column. A step is provided at the lower middle part of the locking body, and the mounting holes B on the upper and lower sides of the step are respectively provided corresponding to the mounting holes A on the bottom plate, and a concave hole for placing the lock core is provided on the upper side of the step, and a key hole A is provided between the bottom surface of the concave hole and the upper side of the locking body, and the key hole A and the key hole B on the lock core are provided correspondingly up and down; a pressure block is provided on one side of the upper side of the bottom plate, and on both sides of the pressure block A mounting hole A is provided, and corresponds to the mounting hole A on the bottom plate. The width of the pressure block is smaller than the width of the bottom plate, and a step for placing the lock tongue is formed between the pressure block and the bottom plate. A rotation groove is provided on one side of the lock tongue, and a convex column is fixed near the edge of the bottom surface of the lock cylinder. The convex column is slidably arranged in the rotation groove. A groove for passing the lock tongue is provided in the middle part under the slider. The slider is arranged on the upper side of the bottom plate. The mounting holes A on the bottom plate and the pressure block are connected to the corresponding mounting holes B on the bottom of the step by bolts, and the mounting holes B on the top of the step are connected to the corresponding mounting holes A on the bottom plate by bolts.

9. The safety grounding device according to claim 7, characterized in that: The keyhole baffle column includes a fixed column and a keyhole baffle plate. The lower end of the fixed column is fixed on a locking nut connected to the outer end surface stud of the support block. The keyhole baffle plate is horizontally fixed to the upper end of the vertically arranged fixed column, and the keyhole baffle plate is located directly above the keyhole B.

10. The method for using the safety grounding device according to any one of claims 1 to 9, comprising the following steps: Step a: clamp the hook end of the grounding hook on one side of the rail, hold the manual ratchet mechanism by hand, shake the handle to drive the pawl on the manual ratchet mechanism to turn the ratchet, the ratchet is meshed with the teeth on the rack, and the ratchet seat is driven to move on the rack, so that the grounding block gradually approaches the rail. During the process of the bayonet on the grounding block and the rail being in contact and clamped, the connecting support block moves toward the grounding block. At this time, the spring is compressed, the stud and the lock hole blocking column are stationary, and come out of the through slot A of the moving locking body, so that the lock hole baffle of the lock hole blocking column no longer blocks the key hole B on the lock core; Step b: The key is in the keyhole A and rotated 180° to the removal position. At this time, the convex column at the bottom of the lock core slides in the rotation groove, so that the lock tongue moves toward the slider and is inserted into the groove under the slider. The handle of the manual ratchet mechanism is limited, and the key can be removed; Step c: insert the taken out key into the keyhole D of the positioning disk on the female connector and the keyhole C of the lock core pin in sequence, turn the key to drive the lock core pin and the limit disk to rotate, so that the arc groove on the limit disk corresponds to the two limit columns, screw the threaded section of the male connector into the stepped recessed hole A, and the contact annular surface on the threaded section is pressed on the edge of the outer end of the sleeve of the two limit columns. While screwing in, the two limit columns extend out of the arc groove, and the key is retained in the female connector and is no longer taken out. Due to the increase in the height of the entire insulating rod, the use requirements are met, and the grounding hook can be hung on the high-voltage line to complete the operation process; Step d: When the interlock needs to be released, remove the grounding hook from the high-voltage line, rotate the threaded section of the male connector in the opposite direction, separate the male connector from the female connector, and the two limit posts withdraw from the arc groove under the reaction force of the compression spring and return to the original state. Rotate the key in the opposite direction to the key removal position. At this time, the lock core pin and the limit plate rotate so that the arc groove on the limit plate no longer corresponds to the two limit posts, and the key can be pulled out; Step e: Insert the key into keyhole A and keyhole B from top to bottom in sequence, and rotate the key in the opposite direction. The convex column is eccentrically set relative to the bottom surface of the lock core. The convex column on the bottom surface of the lock core drives the rotating groove to move the lock tongue and exit the groove under the slider. The handle limit can be released, and the handle is pressed down in the opposite direction. At the same time, the pawl disengages from the ratchet. Pull the handle to one side to drive the ratchet seat and the grounding block to move together, so that the grounding block is disengaged from the rail. At the same time, the lock hole blocking column enters the through groove A of the locking body to block the keyhole B on the lock core. At this time, the key cannot be taken out, and the grounding shoe assembly is removed from the rail to complete the unlocking process.

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