Special tool for live tightening of 110kV terminal board bolts

Abstract

The present invention belongs to the technical field of power grid auxiliary equipment, and relates to a special tool for live tightening of 110kV terminal board bolts. The tool comprises a main insulating rod, a connector, a tightening component, and a fixing component; the top of the main insulating rod is provided with an external thread and is threadedly connected to the tightening component, and the bottom is provided with an external thread and is threadedly connected to the connector; the bottom of the connector is provided with an internal thread; the tightening component comprises a vertical tightening mechanism or a horizontal tightening mechanism; the fixing component comprises a vertical fixing mechanism or a horizontal fixing mechanism; the vertical tightening mechanism is used in conjunction with the vertical fixing mechanism, and the horizontal tightening mechanism is used in conjunction with the horizontal fixing mechanism. The tool can not only tighten the terminal board bolts live to ensure the safety of the power grid, equipment and staff, but also has a good tightening effect, timely eliminates critical defects of the equipment, prevents them before they happen, and ensures the safe and stable operation of the equipment in the station.

Description

Technical Field

[0001] The invention belongs to the technical field of power grid auxiliary equipment and relates to a special tool for live-tightening bolts of a 110kV terminal board. Background Art

[0002] In the power grid industry, the bolts of equipment wire clamps in substations often loosen due to surface oxidation, external force traction, loose crimping, etc., causing heating at the connection of the wire clamps. If the heating is not handled in time, it will aggravate and evolve into a critical defect, which will inevitably cause equipment heating and damage, endangering the safe operation of the power grid. Especially when the critical defect occurs at night, emergency repairs must be carried out at night, and the danger of the workers' work will increase sharply. Therefore, it is often necessary to tighten the bolts of the terminal board live at the beginning of the heating of the equipment wire clamps to solve the problem in time, avoid serious deterioration of heating and damage to the equipment, and reduce the number of power outages.

[0003] Commonly used fastening methods include single insulating rod fixed type and single insulating rod and reversing gear set combination type. Among them, the working process of the single insulating rod fixed type is to use a single insulating rod plus a sleeve joint to fix one end of the screw and use a wrench to tighten it; the device has a simple structure and is quick to implement, but during use, since the single insulating rod has only one end to tighten the bolt, it cannot be tightened when the nut rotates; in addition, facing the horizontally placed bolts, it is also necessary to place them horizontally at the same height, which increases the difficulty and danger of use on site. The working process of the single insulating rod and reversing gear set combination type is to use a single insulating rod plus a reversing gear set to fix one end of the screw, and rotate the driving wheel to drive the driven wheel to tighten the screw; the device can change the tightening direction, saves effort in operation, and has a good tightening effect, but since the gear set can only fix the screw at one end, that is, it can only tighten the vertical bolts, when the nut and the screw rotate together, the gear set cannot be rotated to tighten; in addition, the device has a complex structure, and there are defects such as the gear is stuck and cannot be removed, the processing is difficult, and the cost is high, which limits its further use and promotion. Summary of the invention

[0004] The purpose of the present invention is to provide a special tool for live tightening of bolts of a 110kV terminal board, which has good tightening effect, is detachable, and is simple and flexible to operate.

[0005] The technical solution of the present invention to solve the above technical problems is as follows.

[0006] A special tool for live bolt tightening of 110kV terminal board includes a main insulating rod, a connector, a tightening component, and a fixing component; the top of the main insulating rod is provided with an external thread and is threadedly connected to the tightening component, and the bottom is provided with an external thread and is threadedly connected to the connector; the bottom of the connector is provided with an internal thread; the tightening component includes a vertical tightening mechanism or a horizontal tightening mechanism; the fixing component includes a vertical fixing mechanism or a horizontal fixing mechanism; the vertical tightening mechanism is used in conjunction with the vertical fixing mechanism, and the horizontal tightening mechanism is used in conjunction with the horizontal fixing mechanism. By simultaneously providing the tightening component and the fixing component, the bolt is fixed by the fixing component when tightened, and the tightening effect is better; at the same time, tightening devices in both horizontal and vertical directions are provided to cope with different usage occasions.

[0007] Furthermore, the vertical tightening mechanism is integrated and includes a sleeve joint, a limit rod, and a vertical tightening connecting column; the sleeve joint is a solid cylinder, and an internal thread is provided at its bottom end, the limit rod is fixed to the side wall of the sleeve joint, and the vertical tightening connecting column is fixed to the top of the sleeve joint; the vertical fixing mechanism includes a vertical fixing sleeve, a connecting rod, and a vertical fixing connecting column; the structure of the vertical fixing sleeve is a hollow cylindrical structure, and a right-angled zigzag through groove is opened on its side wall, one end of the connecting rod is fixed to the side wall of the vertical fixing sleeve, and the other end is connected to the vertical fixing connecting column; the outer diameter of the main insulating rod is smaller than the inner diameter of the vertical fixing sleeve, the sleeve joint is connected to the top of the main insulating rod by a thread, and can pass through the interior of the vertical fixing sleeve sleeve together with the main insulating rod, the limit rod can pass through the zigzag through groove of the vertical fixing sleeve, and the vertical tightening connecting column and the vertical fixing connecting column are coaxially arranged. By adopting the above technical solution, vertical tightening is achieved through the coaxial cooperation between the tightening and fixing devices in the vertical direction, and the tightening effect is better.

[0008] Furthermore, the horizontal tightening mechanism includes a horizontal tightening sleeve, a pulling rod, a ratchet, and a horizontal tightening connection column; the horizontal tightening sleeve is a hollow cylindrical structure, and its bottom end is provided with an internal thread, and a straight through groove parallel to its axis is opened on the side wall, one end of the pulling rod is located inside the horizontal tightening sleeve, and is movably connected to the horizontal tightening sleeve through a connecting rod, and its rod body can be embedded in the straight through groove, the other end of the pulling rod is a hollow ring structure, and a ratchet is provided inside it, and the horizontal tightening connection column is arranged inside the ratchet; the horizontal tightening sleeve is threadedly connected to the top of the main insulating rod. Further, the horizontal fixing mechanism includes a secondary insulating rod, a horizontal fixing sleeve, a fixing rod, and a horizontal fixing connection column; the horizontal fixing sleeve is sleeved on the top of the secondary insulating rod and is connected by threads, one end of the fixing rod is fixed on the side wall of the horizontal fixing sleeve, and the other end is connected to the horizontal fixing connection column. Through the cooperation between the tightening and fixing devices in the horizontal direction, the horizontal tightening is achieved, and the tightening effect is better.

[0009] Furthermore, the vertical screw-on connecting column, the vertical fixed connecting column, the horizontal screw-on connecting column, and the horizontal fixed connecting column are all square joint connecting columns, which facilitate direct installation of universal sockets of different sizes.

[0010] Furthermore, the length of the main insulating rod is 2 to 2.5 m and the diameter is 35 to 40 cm; the main insulating rod is made of fiberglass epoxy resin, and an insulating sheath is installed on the rod body; the secondary insulating rod is made of fiberglass epoxy resin, and an insulating sheath is installed on the rod body; thereby enhancing the insulation effect of the insulating rod and ensuring the safety of the tool use.

[0011] The beneficial effects of the special tool for live-tightening bolts of 110kV terminal board of the present invention are as follows:

[0012] (1) Effectively solve the safety accidents such as heating at the connection caused by loose bolts of equipment wire clamps in substations due to loose compaction, surface oxidation, external force traction, etc.;

[0013] (2) On-site operators can directly loosen and tighten bolts on live equipment without power outage, which effectively reduces the difficulty of emergency repair operations, avoids equipment power outages and time constraints on maintenance plans, reduces the equipment downtime rate of substations, increases the safe and stable operation rate of equipment in the station, improves the maintenance effect of the substation monitoring system, and ensures the reliability of regional power supply;

[0014] (3) The fastening effect is better through the coordination between the fastening and tightening mechanisms, and the provision of fastening devices in both vertical and horizontal directions. The tool has a compact structure, small size, fast assembly and disassembly speed, simple operation, and flexible control, which is convenient for maintenance workers to carry, assemble, operate, and transfer during work, shortening the time for preparing various tools before work, greatly improving the efficiency of daily emergency repairs and the quality of equipment maintenance;

[0015] (4) This tool can not only tighten the bolts of the terminal board under power, thus ensuring the safety of the power grid, equipment and personnel, but also has a good tightening effect, timely eliminating critical defects of the equipment, preventing accidents before they occur, and ensuring the safe and stable operation of the equipment in the station. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the vertical tightening mechanism of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the vertical fixing mechanism of the present invention;

[0018] Figure 3 and Figure 4 They are all structural schematic diagrams of the horizontal tightening mechanism of the present invention;

[0019] Figure 5 It is a structural schematic diagram of the horizontal fixing mechanism of the present invention;

[0020] Figure 6 and Figure 7 All of them are diagrams of the vertical fastening process of the present invention;

[0021] Figure 8 for Figure 6 A partial enlarged view of part A.

[0022] The codes in the accompanying drawings are respectively: main insulating rod 1, connecting head 2, vertical tightening mechanism 3, sleeve joint 3-1, limit rod 3-2, vertical tightening connecting column 3-3, horizontal tightening mechanism 4, horizontal tightening sleeve 4-1, pulling rod 4-2, ratchet 4-3, horizontal tightening connecting column 4-4, vertical fixing mechanism 5, vertical fixing sleeve 5-1, connecting rod 5-2, vertical fixed connecting column 5-3, horizontal fixing mechanism 6, secondary insulating rod 6-1, horizontal fixing sleeve 6-2, fixing rod 6-3, horizontal fixed connecting column 6-4. DETAILED DESCRIPTION

[0023] A special tool for live bolt tightening of a 110kV terminal board comprises a main insulating rod 1, a connector 2, a tightening component and a fixing component; the tightening component comprises a vertical tightening mechanism 3 or a horizontal tightening mechanism 4, and the fixing component comprises a vertical fixing mechanism 5 or a horizontal fixing mechanism 6.

[0024] The top end of the main insulating rod 1 is provided with an external thread and is threadedly connected to the tightening component, the bottom end is provided with an external thread and is threadedly connected to the connector 2, and the bottom end of the connector 2 is provided with an internal thread for installing a torque wrench, etc.; the main insulating rod 1 is made of fiberglass epoxy resin, and an insulating sheath is installed on the rod body; the length of the main insulating rod 1 is 2m and the diameter is 35cm.

[0025] The vertical tightening mechanism 3 is used in conjunction with the vertical fixing mechanism 5 .

[0026] like Figure 1 As shown, the vertical tightening mechanism 3 is integrally processed and includes a sleeve joint 3-1, a limiting rod 3-2, and a vertical tightening connecting column 3-3; the sleeve joint 3-1 is a solid cylinder and an internal thread is provided at its bottom end, the limiting rod 3-2 is fixed on the side wall of the sleeve joint 3-1, and the vertical tightening connecting column 3-3 is a square joint connecting column and is fixed to the top of the sleeve joint 3-1.

[0027] like Figure 2As shown, the vertical fixing mechanism 5 includes a vertical fixing sleeve 5-1, a connecting rod 5-2, and a vertical fixing connecting column 5-3; the structure of the vertical fixing sleeve 5-1 is a hollow cylindrical structure, and a right-angled zigzag through groove is opened on its side wall, one end of the connecting rod 5-2 is fixed on the side wall of the vertical fixing sleeve 5-1, and the other end is connected to the vertical fixing connecting column 5-3, and the vertical fixing connecting column 5-3 is a square joint connecting column; the outer diameter of the rod body of the main insulating rod 1 is smaller than the inner diameter of the vertical fixing sleeve 5-1, the sleeve joint 3-1 is connected to the top end of the main insulating rod 1 by a thread, and can pass through the interior of the vertical fixing sleeve 5-1 together with the main insulating rod 1, the limit rod 3-2 can pass through the zigzag through groove of the vertical fixing sleeve 5-1, and the vertical tightening connecting column 3-3 and the vertical fixing connecting column 5-3 are coaxially arranged.

[0028] The horizontal tightening mechanism 4 is used in conjunction with the horizontal fixing mechanism 6 .

[0029] like Figure 3 and Figure 4 As shown, the horizontal tightening mechanism 4 includes a horizontal tightening sleeve 4-1, a pulling rod 4-2, a ratchet 4-3, and a horizontal tightening connecting column 4-4; the horizontal tightening sleeve 4-1 is a hollow cylindrical structure, and its bottom end is provided with an internal thread, and a straight through groove parallel to its axis is opened on the side wall, one end of the pulling rod 4-2 is located inside the horizontal tightening sleeve 4-1, and is movably connected to the horizontal tightening sleeve 4-1 through a connecting rod, and its rod body can be embedded in the straight through groove, the other end of the pulling rod 4-2 is a hollow ring structure, and a ratchet 4-3 is provided inside it, and the horizontal tightening connecting column 4-4 is a square joint connecting column, and is arranged inside the ratchet 4-3; the horizontal tightening sleeve 4-1 is threadedly connected to the top end of the main insulating rod 1.

[0030] like Figure 5 As shown, the horizontal fixing mechanism 6 includes a secondary insulating rod 6-1, a horizontal fixing sleeve 6-2, a fixing rod 6-3, and a horizontal fixing connecting column 6-4; the secondary insulating rod 6-1 is made of glass fiber reinforced plastic epoxy resin, and an insulating sheath is installed on the rod body; the horizontal fixing sleeve 6-2 is sleeved on the top of the secondary insulating rod 6-1 and connected by threads; one end of the fixing rod 6-3 is fixed to the side wall of the horizontal fixing sleeve 6-2, and the other end is connected to the horizontal fixing connecting column 6-4, and the horizontal fixing connecting column 6-4 is a square joint connecting column.

[0031] The present invention discloses a special tool for fastening bolts of a 110kV terminal board under power supply. The main insulating rod 1 is a 110kV insulating operating rod used daily by operation and maintenance personnel. According to Table 2-1 of the "Safety Regulations for Electric Power Work of State Grid Corporation (Substation Part)", "the safe distance when the equipment is not shut down - 110kV is not less than 1.5 meters", and according to the installation drawings of 110kV and below equipment, the basic installation height is 2.5 meters, and the height range of the equipment body is 3 to 4.1 meters. At the same time, during use, the main insulating rod 1 should also have high insulation withstand voltage strength to ensure personal and equipment safety. While ensuring mechanical strength, it should also be light, not too heavy, and easy to hold. Therefore, the length of the main insulating rod is designed to be 2.0 meters, the diameter is designed to be 35 centimeters, and a warning line is set at the corresponding position. The material is glass fiber reinforced plastic epoxy resin with good insulation performance, and an insulating sheath is added. When in use, the warning line must not be crossed.

[0032] like Figure 6 , Figure 7 and Figure 8 As shown, the vertical tightening process of the present invention is to sleeve the vertical fixing sleeve 5-1 of the vertical fixing mechanism 5 on the outside of the main insulating rod 1, so that the vertical fixing sleeve 5-1 can move on the rod body of the main insulating rod 1, screw the sleeve joint 3-1 of the vertical tightening mechanism 3 into the top of the main insulating rod 1, and respectively sleeve two universal square sleeves on the vertical tightening connection column 3-3 and the vertical fixed connection column 5-3, and pass the limit rod 3-2 of the vertical tightening mechanism 3 through the zigzag groove of the horizontal tightening sleeve 4-1 and clamp it in the clamping hole at the end of the zigzag groove. Finally, sleeve the torque wrench or ratchet wrench on the inside of the connector 2; in actual use, the vertical fixing connection The universal square socket on the connecting column 5-3 is sleeved on the nut, rotating and pushing the main insulating rod 1, so that the limit rod 3-2 passes through the zigzag groove and escapes from the position limit of the vertical fixed sleeve 5-1, and by continuously pushing the main insulating rod 1 and the coaxial arrangement of the vertical tightening connecting column 3-3 and the vertical fixed connecting column 5-3, the universal square socket on the vertical tightening connecting column 3-3 is sleeved on the head of the bolt, and the main insulating rod 1 and the sleeve 3-1 are driven to rotate by a torque wrench or a ratchet wrench, thereby tightening the bolt; while tightening, the universal square socket on the vertical fixed connecting column 5-3 fixes the bolt, thereby achieving a better tightening effect.

[0033] The horizontal tightening process of the present invention is to thread the horizontal tightening sleeve 4-1 of the horizontal tightening mechanism 4 onto the main insulating rod 1, thread the horizontal fixing sleeve 6-2 of the horizontal fixing mechanism 6 onto the secondary insulating rod 2, and then respectively put two universal square sleeves on the horizontal tightening connecting column 4-4 and the horizontal fixing connecting column 6-4; in actual use, first fix the nut by the universal square sleeve on the horizontal fixing connecting column 6-4, and then put the universal square sleeve on the horizontal tightening connecting column 4-4 on the head of the bolt, and by pulling the main insulating rod 1, the pulling rod 4-2 rotates in the horizontal tightening sleeve 4-1 and continuously passes in and out of the straight through groove, thereby driving the ratchet 4-3 to rotate and tighten the bolt; while tightening, the universal square sleeve on the horizontal fixing connecting column 6-4 fixes the bolt, thereby achieving a better tightening effect.

[0034] This tightening tool enables maintenance personnel to easily solve heating defects caused by loose terminal board bolts in substations, and the accident maintenance completion rate is 100%.

Claims

1. A method for using a special tool for live tightening of bolts on a 110kV terminal board, characterized in that: The special tool for live-tightening bolts of a 110 kV terminal board comprises a main insulating rod (1), a connector (2), a tightening component, and a fixing component; The top end of the main insulating rod (1) is provided with an external thread and is threadedly connected to the tightening component, and the bottom end is provided with an external thread and is threadedly connected to the connecting head (2); the bottom end of the connecting head (2) is provided with an internal thread; The tightening component comprises a vertical tightening mechanism (3); The fixing component comprises a vertical fixing mechanism (5); The vertical tightening mechanism (3) is used in conjunction with the vertical fixing mechanism (5); The vertical tightening mechanism (3) is integrally processed and comprises a sleeve joint (3-1), a limiting rod (3-2), and a vertical tightening connection column (3-3); the sleeve joint (3-1) is a solid cylinder, and an internal thread is arranged at the bottom end thereof; the limiting rod (3-2) is fixed on the side wall of the sleeve joint (3-1), and the vertical tightening connection column (3-3) is fixed on the top end of the sleeve joint (3-1); The vertical fixing mechanism (5) comprises a vertical fixing sleeve (5-1), a connecting rod (5-2), and a vertical fixing connecting column (5-3); the structure of the vertical fixing sleeve (5-1) is a hollow cylindrical structure, and a right-angled folded line through groove is opened on its side wall; one end of the connecting rod (5-2) is fixed to the side wall of the vertical fixing sleeve (5-1), and the other end is connected to the vertical fixing connecting column (5-3); The outer diameter of the main insulating rod (1) is smaller than the inner diameter of the vertical fixing sleeve (5-1); the sleeve joint (3-1) is connected to the top of the main insulating rod (1) by means of threads and can pass through the interior of the vertical fixing sleeve (5-1) together with the main insulating rod (1); the limit rod (3-2) can pass through the zigzag through groove of the vertical fixing sleeve (5-1); and the vertical tightening connection column (3-3) and the vertical fixing connection column (5-3) are coaxially arranged; The method of use is as follows: the vertical fixing sleeve (5-1) of the vertical fixing mechanism (5) is mounted on the outside of the main insulating rod (1) to enable the vertical fixing sleeve (5-1) to move on the rod body of the main insulating rod (1); the sleeve joint (3-1) of the vertical tightening mechanism (3) is screwed into the top end of the main insulating rod (1); two universal square sleeves are respectively mounted on the vertical tightening connection column (3-3) and the vertical fixing connection column (5-3); the limiting rod (3-2) of the vertical tightening mechanism (3) is passed through the zigzag through groove of the vertical fixing sleeve (5-1) and is clamped in the clamping hole at the end of the zigzag through groove; finally, a torque wrench or a ratchet wrench is mounted on the connection column; The interior of the joint (2); in actual use, the universal square socket on the vertical fixed connection column (5-3) is sleeved on the nut, and the main insulating rod (1) is rotated and pushed, so that the limit rod (3-2) passes through the broken line through groove and escapes from the position limit of the vertical fixed sleeve (5-1), and the main insulating rod (1) and the vertical tightening connection column (3-3) and the vertical fixed connection column (5-3) are continuously pushed coaxially, so that the universal square socket on the vertical tightening connection column (3-3) is sleeved on the head of the bolt, and the main insulating rod (1) and the sleeve joint (3-1) are driven to rotate by a torque wrench or a ratchet wrench, thereby tightening the bolt.

2. The method for using a special tool for live-tightening bolts of a 110kV terminal block according to claim 1, characterized in that: The vertical tightening connection column (3-3) and the vertical fixing connection column (5-3) are both square joint connection columns.

3. The method for using a special tool for live-tightening bolts of a 110kV terminal board as claimed in claim 1 or 2, characterized in that: The main insulating rod (1) has a length of 2 to 2.5 m and a diameter of 35 to 40 cm.

4. The method for using a special tool for live-tightening bolts of a 110kV terminal board as claimed in claim 3, characterized in that: The main insulating rod (1) is made of glass fiber reinforced plastic epoxy resin, and an insulating sheath is installed on the rod body.

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