High-voltage current transformer for state grid metering

Abstract

The invention discloses a high-voltage current transformer for state grid metering, and relates to the technical field of current transformers, the high-voltage current transformer comprises a bottom plate and a current transformer shell, the bottom plate is internally provided with a lifting mechanism, the lifting mechanism is provided with an auxiliary supporting assembly, the bottom plate is internally provided with an auxiliary fixing assembly, and through the use of the movable fixing assembly, the current transformer shell is fixed to the bottom plate. A worker can move the position of the fixing plate front and back and left and right, so that the mounting hole in the fixing plate is aligned with the hole in the mounting platform, namely, the fixing rod is aligned with the hole, and the error of the hole position in the mounting platform within a certain range is met; in the fixing process, the current transformer can be pressed downwards, then the rubber damping plate at the bottom of the bottom plate is compressed, the upper surface of the metal mounting plate and the lower surface of the platform are stably clamped, and then the mounting stability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of current transformers, in particular to a high-voltage current transformer for national grid metering. Background Art

[0002] A high-voltage current transformer is an electrical device used to measure and monitor the current in a high-voltage circuit. It is a device that converts high-voltage current into low-voltage current. It is usually used in power systems. During the use of high-voltage current transformers, multiple bolts are usually used to fix them. However, due to the size of the screw holes on the mounting surface and the position of the openings on the current transformer, it is sometimes necessary to drill holes on site during the installation process, and the current transformer needs to be repeatedly hoisted, which makes the operation more troublesome. At the same time, the existing high-voltage current transformers are moved during use by equipment hoisting or manual handling. However, large high-voltage current transformers are heavy, so the operation is very laborious. In addition, the height of the existing high-voltage current transformer cannot be adjusted after installation. If the height needs to be adjusted, the bolts need to be removed, and the high-voltage current transformer needs to be hoisted by the hoisting equipment. It is very troublesome to adjust the height by adding gaskets. Therefore, we propose a high-voltage current transformer for national grid metering. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a high-voltage current transformer for national grid metering, which solves the problems raised in the above-mentioned background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high-voltage current transformer for national grid metering, comprising a base plate and a current transformer housing, a lifting mechanism is installed inside the base plate, an auxiliary support assembly is provided on the lifting mechanism, an auxiliary fixing assembly is installed inside the base plate, a movable fixing assembly is provided inside the base plate, and the current transformer housing is fixedly installed on the upper surface of the base plate;

[0005] The lifting mechanism includes a driving shaft and a driving rod. The driving rod and the driving shaft are rotatably mounted inside the bottom plate through bearings. A worm gear is fixedly sleeved in the middle of the driving rod. Support legs are fixedly sleeved on both end surfaces of the driving shaft. Rollers are installed at the ends of the support legs.

[0006] The auxiliary support assembly includes a telescopic rod and a driven shaft, wherein the driven shaft is rotatably mounted inside the bottom plate, and the driven shaft is fixedly connected with the telescopic rod, and the telescopic rod is rotatably mounted on the upper surface of the support leg;

[0007] The movable fixing assembly comprises a fixing rod, a moving groove and a fixing plate, wherein both sides of the fixing rod are fixedly connected with guide plates, a metal mounting plate is slidably mounted on the surface of the guide plate, a push spring is movably sleeved on the surface of the guide plate, and both ends of the push spring are respectively fixedly connected with the metal mounting plate and the inner wall of the fixing rod;

[0008] A through groove is provided on the upper surface of the base plate, and movable grooves are provided inside the base plate and on both sides of the through groove. A fixed plate is slidably installed in the inner cavity of the movable groove, and positioning plates are slidably installed inside both ends of the fixed plate. A conical limiting pin is fixedly connected to the lower surface of the fixed plate, and a conical fixing hole is provided inside the base plate and at the bottom of the inner cavity of the movable groove.

[0009] Preferably, a spring is fixedly connected to the top of the inner cavity of the movable groove, and a support plate is fixedly connected to the bottom of the spring. The support plate is slidably installed in the inner cavity of the movable groove. Guide rods are slidably installed at the ends of the inner cavity of the movable groove. The guide rods pass through the positioning plate and are slidably connected to the positioning plate.

[0010] Preferably, a mounting hole is provided in the middle of the fixing plate, a nut sinking groove is provided on the upper surface of the fixing plate and located outside the mounting hole, the fixing rod is sleeved into the inner cavity of the mounting hole, a rotating rod is rotatably installed in the middle of the fixing rod, and metal ropes are fixedly connected on both sides of the rotating rod, and the metal ropes pass through the guide plate and are fixedly connected to the end of the inner cavity of the metal mounting plate, a rotating plate is fixedly connected to the top of the rotating rod, the rotating plate is fixedly connected to the top of the fixing rod, a rotating paddle is fixedly connected to the rotating plate, a positioning pin is slidably installed on the rotating plate, and the bottom end of the positioning pin is inserted into the interior of the fixing rod.

[0011] Preferably, the auxiliary fixing assembly includes a pull rod, a positioning tooth block, and a positioning gear. The positioning gear is fixedly installed on the surface of the driving shaft, and a pull rod is slidably installed inside the base plate. A movable cavity is opened inside the base plate and located on one side of the positioning gear. A positioning tooth block is fixedly connected to the bottom of the pull rod and located in the movable cavity. The movable cavity is meshed with the positioning gear, one end of the pull rod is fixedly connected to a sliding block, one end of the sliding block is fixedly connected to a traction spring, and the traction spring is fixedly connected to the inner wall of the base plate.

[0012] Preferably, the driving rod is provided with two groups of worm segments, and the textures on the two groups of worm segments are opposite. The driving rod is meshed with the worm wheel through the worm segments. A rotating column is movably sleeved on one end of the driving rod. A rotating rod is rotatably installed on the surface of the rotating column, and the rotating rod is fixedly connected to the other end of the pull rod. A rocking rod is slidably installed in the inner cavity of the rotating column.

[0013] Preferably, both ends of the driving shaft are fixedly connected with sprocket one, one end of the driven shaft is fixedly connected with a driven gear, sprocket two is rotatably installed inside the base plate, both sides of sprocket two are fixedly connected with driving gears, and the driving gear is meshed with the driven gear, and a precision chain is installed on sprocket two and sprocket one for transmission.

[0014] Preferably, a storage groove is provided at the bottom of the base plate, the support legs are located in the inner cavity of the storage groove, and a rubber shock-absorbing plate is fixedly installed at the bottom of the base plate.

[0015] Preferably, a mounting ring is installed on the base plate, a coil assembly is installed inside the current transformer housing, a rubber shock-absorbing plate is provided at the bottom of the current transformer housing, a connecting bolt is installed on the top of the current transformer housing, a cooling cover is installed on both sides of the current transformer housing, and fins located in the inner cavity of the cooling cover are connected to both sides of the current transformer housing.

[0016] Preferably, guide columns are fixedly connected to both sides of the top of the current transformer housing, a bidirectional screw is rotatably connected to the middle of the top of the current transformer housing, protective covers are threadedly installed at both ends of the bidirectional screw in opposite directions, a through groove is opened on the protective cover, and an insulating rubber plate is fixedly connected to the inner cavity of the through groove, both sides of the protective cover are slidably connected to the surface of the guide column, and handles are provided at the ends of the bidirectional screw.

[0017] Preferably, a fastening plate is rotatably mounted inside the supporting leg via an axis, a rectangular groove is opened at one end of the fastening plate, a fixing block is rotatably mounted in the inner cavity of the rectangular groove, and the inner cavity of the fixing block is adapted to the fixing rod.

[0018] The present invention provides a high-voltage current transformer for national grid metering, which has the following beneficial effects:

[0019] 1. The high-voltage current transformer used for national grid metering, through the use of mobile fixing components, the staff can move the fixing plate position forward, backward, left and right, so that the mounting holes on the fixing plate are aligned with the holes on the mounting platform, that is, the fixing rod is aligned with the hole, so as to meet the error of the hole position on the mounting platform within a certain range. The push spring is used to push the metal mounting plate to the outside of the fixing rod, so that the upper surface of the metal mounting plate contacts the lower surface of the platform to form a fixation. During the fixing process, the current transformer can be pressed down, thereby compressing the rubber shock-absorbing plate at the bottom of the bottom plate, so that the upper surface of the metal mounting plate and the lower surface of the platform are stably stuck, thereby improving the installation stability, and the operation is very simple.

[0020] 2 The high-voltage current transformer for national grid metering, through the coordinated use of the lifting mechanism, auxiliary support assembly, and auxiliary fixing assembly, drives the rotating column and the driving rod to rotate by rotating the shaking rod, and then the driving shaft drives the supporting leg to rotate, so that the end position of the supporting leg is lowered, and the roller is in contact with the ground, which is convenient for movement and transportation, and the movement process and installation process are more convenient. During the rotation of the driving shaft, the corresponding sprocket wheel 1 will be driven to rotate, and the sprocket wheel 1 will drive the sprocket wheel 2 and the driving gear to rotate through the precision chain, and the driving gear will drive the driven gear to rotate, so that the driven gear and the corresponding sprocket wheel 1 will rotate The direction is opposite. At this time, the driven gear drives the driven shaft to rotate, and then the driven shaft rotates, so that the telescopic rod rotates in coordination with the movement of the supporting legs, and the supporting legs are supported by the telescopic rod, thereby improving the support stability. After adjustment, the rotating column is loosened, and the pull rod is reset under the action of the traction spring. At this time, the positioning tooth block is reset and meshes with the positioning gear, thereby limiting the positioning gear, thereby preventing the driving shaft from rotating, forming a locked state, thereby avoiding looseness during movement or support, thereby improving stability, and at the same time, it is also to avoid accidentally touching the rocking rod to push the driving rod to rotate, thereby improving safety and stability.

[0021] 3. The high-voltage current transformer used for metering in the national grid is used in conjunction with the fastening plate and the fixing block. When the current transformer needs to be raised to a higher position for fixing, it is lifted through the lifting mechanism, and the fastening plate is pulled to rotate so that one end of the fastening plate contacts the mounting surface, and then the fixing block is rotated to make the fixing block vertical, and bolts or fixing rods are used to pass through the holes on the mounting platform for fixing. The installation height can be adjusted arbitrarily within a certain range. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the front side of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the present invention from a top view;

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the bottom plate of the present invention when viewed from above;

[0025] Figure 4 It is a schematic structural diagram of a side cross-section of the bottom plate of the present invention;

[0026] Figure 5 For the present invention Figure 2 A schematic diagram of the structure enlargement at the center A;

[0027] Figure 6 It is a structural schematic diagram of the fixing plate of the present invention;

[0028] Figure 7 It is a structural schematic diagram of the fixing rod of the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of the present invention in cross section;

[0030] Fig. 9 For the present invention Figure 4 Schematic diagram of the structure unfolded in the middle;

[0031] Fig.10 It is a structural schematic diagram of the fixing block of the present invention;

[0032] Fig.11 It is a structural schematic diagram of the three-dimensional viewing angle of the present invention;

[0033] Fig.12 For the present invention Figure 7 A magnified schematic diagram of the structure at point B in the middle.

[0034] In the figure: 1, bottom plate; 2, current transformer housing; 3, sprocket one; 4, storage slot; 5, support leg; 6, roller; 7, rotating rod; 8, rotating column; 9, rocking rod; 10, moving chamber; 11, positioning gear block; 12, worm gear; 13, driving rod; 14, positioning gear; 15, sliding block; 16, traction spring; 17, connecting bolt; 18, driven gear; 19, sprocket two; 20, driving gear; 21, driving shaft; 22, pull rod; 23, telescopic rod; 24, driven shaft; 25, through slot; 26, fixing plate; 27, fin; 2 8. Conical fixing hole; 29. ​​Mounting hole; 30. Moving slot; 31. Rectangular slot; 32. Positioning plate; 33. Nut sinking slot; 34. Guide rod; 35. Metal rope; 36. Rotating paddle; 37. Guide plate; 38. Metal mounting plate; 39. Push spring; 40. Positioning pin; 41. Cooling cover; 42. Turning rod; 43. Rotating plate; 44. Fixing rod; 45. Conical limiting pin; 46. Rubber shock absorbing plate; 47. Guide column; 48. Insulating rubber plate; 49. Protective cover; 50. Fastening plate; 51. Fixing block; 52. Bidirectional screw. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] See also Figures 1 to 12 The present invention provides a technical solution: a high-voltage current transformer for national grid metering, comprising a bottom plate 1 and a current transformer housing 2, a lifting mechanism is installed inside the bottom plate 1, an auxiliary support assembly is provided on the lifting mechanism, an auxiliary fixing assembly is installed inside the bottom plate 1, a movable fixing assembly is provided inside the bottom plate 1, and the current transformer housing 2 is fixedly installed on the upper surface of the bottom plate 1,

[0037] The lifting mechanism includes a driving shaft 21 and a driving rod 13. The driving rod 13 and the driving shaft 21 are both rotatably mounted inside the bottom plate 1 through bearings. A worm gear 12 is fixedly sleeved in the middle of the driving rod 13. Support legs 5 are fixedly sleeved on both end surfaces of the driving shaft 21. Rollers 6 are installed at the ends of the support legs 5.

[0038] The auxiliary support assembly includes a telescopic rod 23 and a driven shaft 24. The driven shaft 24 is rotatably mounted inside the base plate 1, and the driven shaft 24 is fixedly connected to the telescopic rod 23. The telescopic rod 23 is rotatably mounted on the upper surface of the support leg 5.

[0039] The movable fixing assembly includes a fixing rod 44, a moving groove 30, and a fixing plate 26. The fixing rod 44 is fixedly connected to guide plates 37 on both sides thereof. A metal mounting plate 38 is slidably mounted on the surface of the guide plate 37. A push spring 39 is movably sleeved on the surface of the guide plate 37. The two ends of the push spring 39 are fixedly connected to the metal mounting plate 38 and the inner wall of the fixing rod 44, respectively.

[0040] A through groove 25 is provided on the upper surface of the base plate 1, and movable grooves 30 are provided inside the base plate 1 and on both sides of the through groove 25. A fixed plate 26 is slidably installed in the inner cavity of the movable groove 30, and positioning plates 32 are slidably installed inside both ends of the fixed plate 26. A conical limiting pin 45 is fixedly connected to the lower surface of the fixed plate 26, and a conical fixing hole 28 is provided inside the base plate 1 and at the bottom of the inner cavity of the movable groove 30.

[0041] A spring is fixedly connected to the top of the inner cavity of the movable groove 30, and a support plate is fixedly connected to the bottom of the spring. The support plate is slidably installed in the inner cavity of the movable groove 30. Guide rods 34 are slidably installed up and down at the ends of the inner cavity of the movable groove 30. The guide rods 34 pass through the positioning plate 32 and are slidably connected to the positioning plate 32.

[0042] A mounting hole 29 is provided in the middle of the fixing plate 26, and a nut sinking groove 33 is provided on the upper surface of the fixing plate 26 and located outside the mounting hole 29. The fixing rod 44 is sleeved into the inner cavity of the mounting hole 29. A rotating rod 42 is rotatably installed in the middle of the fixing rod 44, and metal ropes 35 are fixedly connected on both sides of the rotating rod 42. The metal ropes 35 penetrate the guide plate 37 and are fixedly connected to the end of the inner cavity of the metal mounting plate 38. A rotating plate 43 is fixedly connected to the top of the rotating rod 42. The rotating plate 43 is fixedly connected to the top of the fixing rod 44. A rotating paddle 36 is fixedly connected to the rotating plate 43. A positioning pin 40 is slidably installed on the rotating plate 43, and the bottom end of the positioning pin 40 is inserted into the fixing rod 44.

[0043] When installing the current transformer, the size of the screw hole on the installation surface and the position of the opening are sometimes different from the position of the opening on the bottom plate 1, which sometimes requires on-site drilling during the installation process, and the current transformer needs to be repeatedly hoisted, which makes the operation more troublesome, and multiple bolts need to be installed, and tools need to be used for tightening, which is also troublesome.

[0044] When in use, the current transformer is hoisted onto the installation platform by using a hoisting device. The worker can lift the fixing plate 26 upwards, at which time the conical limiting nail 45 is separated from the inner cavity of the conical fixing hole 28, and then the fixing plate 26 is moved forward, backward, left and right to align the mounting hole 29 on the fixing plate 26 with the hole on the installation platform, that is, to align the fixing rod 44 with the hole, thereby satisfying the error of the hole position on the installation platform within a certain range.

[0045] Then release the fixing plate 26. At this time, the support plate moves downward under the action of the spring, and then pushes the fixing plate 26 downward, so that the conical limiting nail 45 at the bottom of the fixing plate 26 is inserted into the inner cavity of the conical fixing hole 28, and the fixing rod 44 is pressed down to insert the fixing rod 44 into the hole, and then the positioning pin 40 is pulled out. At this time, the pushing spring 39 is not limited, and it will push the metal mounting plate 38 to move outside the fixing rod 44, so that the upper surface of the metal mounting plate 38 contacts the lower surface of the platform to form a fixation. During the fixing process, the current transformer can be pressed down, thereby compressing the rubber shock-absorbing plate 46 at the bottom of the base plate 1, so that the upper surface of the metal mounting plate 38 and the lower surface of the platform are stably stuck, thereby improving the installation stability, and the operation is very simple, you only need to pull out the positioning pin 40 and press it.

[0046] The auxiliary fixing assembly includes a pull rod 22, a positioning gear block 11, and a positioning gear 14. The positioning gear 14 is fixedly installed on the surface of the driving shaft 21. The pull rod 22 is slidably installed inside the base plate 1. A moving cavity 10 is opened inside the base plate 1 and located on one side of the positioning gear 14. The bottom of the pull rod 22 and the inner cavity of the moving cavity 10 are fixedly connected with the positioning gear block 11. The moving cavity 10 is meshed with the positioning gear 14. One end of the pull rod 22 is fixedly connected with a sliding block 15. One end of the sliding block 15 is fixedly connected with a traction spring 16, and the traction spring 16 is fixedly connected to the inner wall of the base plate 1.

[0047] Two groups of worm segments are provided on the driving rod 13, and the textures on the two groups of worm segments are opposite. The driving rod 13 is meshed with the worm wheel 12 through the worm segments. A rotating column 8 is movably sleeved on one end of the driving rod 13. A rotating rod 7 is rotatably installed on the surface of the rotating column 8, and the rotating rod 7 is fixedly connected to the other end of the pull rod 22. A rocking rod 9 is slidably installed in the inner cavity of the rotating column 8.

[0048] Both ends of the driving shaft 21 are fixedly connected with sprocket 1 3, one end of the driven shaft 24 is fixedly connected with the driven gear 18, and a sprocket 2 19 is rotatably installed inside the base plate 1. Both sides of the sprocket 2 19 are fixedly connected with the driving gear 20, and the driving gear 20 is meshed with the driven gear 18. A precision chain is installed on the sprocket 2 19 and the sprocket 1 3 for transmission.

[0049] A storage groove 4 is provided at the bottom of the base plate 1 , and the support legs 5 are located in the inner cavity of the storage groove 4 . A rubber shock-absorbing plate 46 is fixedly installed at the bottom of the base plate 1 .

[0050] First, pull the rotating column 8 outward to move the rotating column 8 outward, and then pull the pull rod 22 through the rotating rod 7 to move the positioning tooth block 11 to move and separate from the positioning gear 14, and then drive the rotating column 8 and the driving rod 13 to rotate by rotating the rocking rod 9, and use the worm segment on the driving rod 13 to drive the two worm wheels 12 to rotate one counterclockwise and the other clockwise, so that the driving shaft 21 drives the supporting leg 5 to rotate, so that the end position of the supporting leg 5 drops, and the roller 6 contacts the ground, which is convenient for movement and transportation, and the moving process and installation process are more convenient.

[0051] During the rotation of the driving shaft 21, the corresponding sprocket 13 will be driven to rotate. The sprocket 13 drives the sprocket 2 19 and the driving gear 20 to rotate through the precision chain. The driving gear 20 drives the driven gear 18 to rotate, so that the driven gear 18 rotates in the opposite direction to the corresponding sprocket 13. At this time, the driven gear 18 drives the driven shaft 24 to rotate, and then the driven shaft 24 rotates, so that the telescopic rod 23 rotates in coordination with the movement of the support leg 5, and the support leg 5 is supported by the telescopic rod 23, thereby improving the support stability.

[0052] After adjustment, the rotating column 8 is released. At this time, the pull rod 22 is reset under the action of the traction spring 16. At this time, the positioning tooth block 11 is reset and meshes with the positioning gear 14, thereby limiting the positioning gear 14, thereby preventing the driving shaft 21 from rotating, forming a locked state, thereby preventing looseness during movement or support, thereby improving stability, and also preventing accidental contact with the rocking rod 9 to push the driving rod 13 to rotate, thereby improving safety and stability.

[0053] Secondly, during the installation process, once the thickness of the installation platform is relatively thin, it can be reinforced by adjusting the height of the base plate 1, thereby further improving the stability and adaptability of the installation.

[0054] A mounting ring is installed on the bottom plate 1, a coil assembly is installed inside the current transformer housing 2, a rubber shock absorbing plate 46 is provided at the bottom of the current transformer housing 2, a wiring bolt 17 is installed at the top of the current transformer housing 2, cooling covers 41 are installed on both sides of the current transformer housing 2, and fins 27 located in the inner cavity of the cooling cover 41 are connected to both sides of the current transformer housing 2.

[0055] By pouring cooling liquid into the inner cavity of the cooling cover 41, the cooling liquid can absorb heat through cooperation with the fins 27, thereby avoiding high temperature during the load operation of the current transformer housing 2 and improving stability.

[0056] Guide columns 47 are fixedly connected to both sides of the top of the current transformer housing 2, and a bidirectional screw rod 52 is rotatably connected to the middle of the top of the current transformer housing 2. Both ends of the bidirectional screw rod 52 with opposite thread directions are threadedly installed with protective covers 49. A through groove is opened on the protective cover 49, and an insulating rubber plate 48 is fixedly connected to the inner cavity of the through groove. Both sides of the protective cover 49 are slidably connected to the surface of the guide column 47, and handles are provided at the ends of the bidirectional screw rod 52.

[0057] When wiring, the two sets of protective covers 49 are separated by turning the handle to carry out wiring. After wiring, the two-way screw rod 52 is rotated in the opposite direction to close the two sets of protective covers 49, and the line is squeezed by the insulating rubber plate 48 to fit the periphery of the line to protect the wiring bolts 17 on the top of the current transformer housing 2, thereby preventing dust, water stains, etc. from contacting the wiring bolts 17 and causing failure of the wiring bolts 17, thereby improving safety in use.

[0058] A fastening plate 50 is rotatably mounted inside the supporting leg 5 via an axis, a rectangular groove 31 is opened at one end of the fastening plate 50 , a fixing block 51 is rotatably mounted in the inner cavity of the rectangular groove 31 , and the inner cavity of the fixing block 51 is adapted to the fixing rod 44 .

[0059] The outer side of the fastening plate 50 is provided with rubber, and the fastening plate 50 contacts the inside of the supporting leg 5 through the rubber. During the storage process, the rubber is squeezed to limit the position of the fastening plate 50 to prevent it from falling off.

[0060] During the installation process, if the current transformer needs to be lifted to a higher position for fixation, it can be lifted by a lifting mechanism, and the fastening plate 50 is rotated by pulling the pull ring at the bottom of the fastening plate 50 so that one end of the fastening plate 50 contacts the installation surface, and then the fixing block 51 is rotated to make the fixing block 51 vertical, and fixed with bolts or fixing rods 44 through the holes on the installation platform. The installation height can be adjusted arbitrarily within a certain range.

[0061] In summary, when the high-voltage current transformer for national grid metering is used, during the installation process, the rotating column 8 is first pulled outward to move the rotating column 8 outward, and then the pull rod 22 is pulled through the rotating rod 7 to move, so that the positioning gear block 11 moves and separates from the positioning gear 14, and the rotating column 8 and the driving rod 13 are driven to rotate by rotating the shaking rod 9, and the two worm gears 12 are driven to rotate one counterclockwise and the other clockwise by the worm segment on the driving rod 13, so that the driving shaft 21 drives the supporting leg 5 to rotate, so that the end position of the supporting leg 5 is lowered, and the roller 6 is in contact with the ground;

[0062] After adjustment, the rotating column 8 is released, and the pull rod 22 is reset under the action of the traction spring 16. At this time, the positioning tooth block 11 is reset and meshes with the positioning gear 14, thereby limiting the positioning gear 14.

[0063] By using the lifting equipment to lift the current transformer onto the installation platform, the roller 6 is brought into contact with the installation platform. The staff can first adjust the position of the current transformer, and then repeat the above operation to control the roller 6 to reset, and at this time 46 is in contact with the surface of the platform;

[0064] The staff can lift the fixing plate 26 upwards, at which time the conical limiting pin 45 is separated from the inner cavity of the conical fixing hole 28, and then move the fixing plate 26 forward, backward, left and right to align the mounting hole 29 on the fixing plate 26 with the hole on the mounting platform, that is, to align the fixing rod 44 with the hole, thereby satisfying the error of the hole position on the mounting platform within a certain range;

[0065] Then release the fixing plate 26. At this time, the support plate moves downward under the action of the spring, and then pushes the fixing plate 26 downward, so that the conical limiting nail 45 at the bottom of the fixing plate 26 is inserted into the inner cavity of the conical fixing hole 28, and the fixing rod 44 is pressed down to insert the fixing rod 44 into the hole, and then the positioning pin 40 is pulled out. At this time, the pushing spring 39 is not limited, and it will push the metal mounting plate 38 to move outside the fixing rod 44, so that the upper surface of the metal mounting plate 38 contacts the lower surface of the platform to form a fixation. During the fixing process, the current transformer can be pressed down, thereby compressing the rubber shock absorbing plate 46 at the bottom of the bottom plate 1, so that the upper surface of the metal mounting plate 38 and the lower surface of the platform are stably stuck;

[0066] Secondly, during the installation process, if the thickness of the installation platform is thin or becomes loose after installation, the height of the bottom plate 1 can be adjusted through the lifting mechanism, thereby achieving reinforcement, and the installation height of the bottom plate 1 can be adjusted through the lifting mechanism;

[0067] When wiring, the two sets of protective covers 49 are separated by turning the handle to connect the wires. After the wiring, the two-way screw rod 52 is turned to close the two sets of protective covers 49 and squeeze the line through the insulating rubber plate 48.

[0068] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-voltage current transformer for national grid metering, comprising a base plate (1) and a current transformer housing (2), characterized in that: A lifting mechanism is installed inside the base plate (1), an auxiliary support assembly is provided on the lifting mechanism, an auxiliary fixing assembly is installed inside the base plate (1), a movable fixing assembly is provided inside the base plate (1), and the current transformer housing (2) is fixedly installed on the upper surface of the base plate (1); The lifting mechanism comprises a driving shaft (21) and a driving rod (13); the driving rod (13) and the driving shaft (21) are both rotatably mounted inside the base plate (1) via bearings; a worm gear (12) is fixedly sleeved at the middle of the driving rod (13); support legs (5) are fixedly sleeved at both end surfaces of the driving shaft (21); rollers (6) are mounted at the ends of the support legs (5); The auxiliary support assembly comprises a telescopic rod (23) and a driven shaft (24), wherein the driven shaft (24) is rotatably mounted inside the base plate (1), and the driven shaft (24) is fixedly connected to the telescopic rod (23), and the telescopic rod (23) is rotatably mounted on the upper surface of the support leg (5); The movable fixing assembly comprises a fixing rod (44), a movable groove (30), and a fixing plate (26); guide plates (37) are fixedly connected to both sides of the fixing rod (44); a metal mounting plate (38) is slidably mounted on the surface of the guide plate (37); a push spring (39) is movably sleeved on the surface of the guide plate (37); and two ends of the push spring (39) are respectively fixedly connected to the metal mounting plate (38) and the inner wall of the fixing rod (44); A through groove (25) is provided on the upper surface of the bottom plate (1), and movable grooves (30) are provided inside the bottom plate (1) and located on both sides of the through groove (25); a fixed plate (26) is slidably installed in the inner cavity of the movable groove (30), and positioning plates (32) are slidably installed inside both ends of the fixed plate (26); a conical limiting pin (45) is fixedly connected to the lower surface of the fixed plate (26), and a conical fixing hole (28) is provided inside the bottom plate (1) and located at the bottom of the inner cavity of the movable groove (30).

2. A high-voltage current transformer for national grid measurement according to claim 1, characterized in that: A spring is fixedly connected to the top of the inner cavity of the movable groove (30), and a support plate is fixedly connected to the bottom of the spring. The support plate is slidably installed in the inner cavity of the movable groove (30). Guide rods (34) are slidably installed at the ends of the inner cavity of the movable groove (30). The guide rods (34) penetrate the positioning plate (32) and are slidably connected to the positioning plate (32).

3. A high-voltage current transformer for national grid measurement according to claim 1, characterized in that: A mounting hole (29) is provided in the middle of the fixing plate (26), a nut sinking groove (33) is provided on the upper surface of the fixing plate (26) and located outside the mounting hole (29), the fixing rod (44) is sleeved into the inner cavity of the mounting hole (29), a rotating rod (42) is rotatably installed in the middle of the fixing rod (44), and metal ropes (35) are fixedly connected to both sides of the rotating rod (42), and the metal ropes (35) pass through the guide plate (37) and are fixedly connected to the inner cavity end of the metal mounting plate (38), the top of the rotating rod (42) is fixedly connected to a rotating plate (43), the rotating plate (43) is fixedly connected to the top of the fixing rod (44), a rotating paddle (36) is fixedly connected to the rotating plate (43), a positioning pin (40) is slidably installed on the rotating plate (43), and the bottom end of the positioning pin (40) is inserted into the fixing rod (44).

4. A high-voltage current transformer for national grid measurement according to claim 1, characterized in that: The auxiliary fixing assembly comprises a pull rod (22), a positioning tooth block (11), and a positioning gear (14); the positioning gear (14) is fixedly mounted on the surface of the driving shaft (21); the pull rod (22) is slidably mounted inside the base plate (1); a movable cavity (10) is provided inside the base plate (1) and located on one side of the positioning gear (14); the bottom of the pull rod (22) and located in the inner cavity of the movable cavity (10) are fixedly connected with a positioning tooth block (11); the movable cavity (10) is meshed with the positioning gear (14); one end of the pull rod (22) is fixedly connected with a sliding block (15); one end of the sliding block (15) is fixedly connected with a traction spring (16); and the traction spring (16) is fixedly connected to the inner wall of the base plate (1).

5. A high-voltage current transformer for national grid measurement according to claim 1, characterized in that: The driving rod (13) is provided with two groups of worm segments, and the patterns on the two groups of worm segments are opposite. The driving rod (13) is meshed with the worm wheel (12) through the worm segments. One end of the driving rod (13) is movably sleeved with a rotating column (8). A rotating rod (7) is rotatably mounted on the surface of the rotating column (8), and the rotating rod (7) is fixedly connected to the other end of the pull rod (22). A rocking rod (9) is slidably mounted in the inner cavity of the rotating column (8).

6. A high-voltage current transformer for national grid measurement according to claim 1, characterized in that: Both ends of the driving shaft (21) are fixedly connected to a sprocket wheel one (3), one end of the driven shaft (24) is fixedly connected to a driven gear wheel (18), a sprocket wheel two (19) is rotatably mounted inside the base plate (1), both sides of the sprocket wheel two (19) are fixedly connected to a driving gear wheel (20), and the driving gear wheel (20) is meshed with the driven gear wheel (18), and a precision chain is installed on the sprocket wheel two (19) and the sprocket wheel one (3) for transmission.

7. A high-voltage current transformer for national grid measurement according to claim 1, characterized in that: The bottom of the base plate (1) is provided with a storage groove (4), the support leg (5) is located in the inner cavity of the storage groove (4), and a rubber shock-absorbing plate (46) is fixedly installed on the bottom of the base plate (1).

8. A high-voltage current transformer for national grid measurement according to claim 1, characterized in that: A mounting ring is installed on the bottom plate (1), a coil assembly is installed inside the current transformer housing (2), a rubber shock-absorbing plate (46) is provided at the bottom of the current transformer housing (2), a connecting bolt (17) is installed at the top of the current transformer housing (2), cooling covers (41) are installed on both sides of the current transformer housing (2), and fins (27) located in the inner cavity of the cooling cover (41) are connected to both sides of the current transformer housing (2).

9. A high-voltage current transformer for national grid measurement according to claim 1, characterized in that: Both sides of the top of the current transformer housing (2) are fixedly connected to guide columns (47), and a bidirectional screw rod (52) is rotatably connected to the middle of the top of the current transformer housing (2). Both ends of the bidirectional screw rod (52) with opposite thread directions are threadedly mounted with protective covers (49), and a through groove is provided on the protective cover (49), and an insulating rubber plate (48) is fixedly connected to the inner cavity of the through groove. Both sides of the protective cover (49) are slidably sleeved onto the surface of the guide column (47), and handles are provided at the ends of the bidirectional screw rod (52).

10. A high-voltage current transformer for national grid measurement according to claim 1, characterized in that: A fastening plate (50) is rotatably mounted inside the support leg (5) via an axis, a rectangular groove (31) is provided at one end of the fastening plate (50), a fixing block (51) is rotatably mounted in the inner cavity of the rectangular groove (31), and the inner cavity of the fixing block (51) is adapted to fit the fixing rod (44).

Images