A high-voltage current transformer for State Grid metering

Abstract

The present invention discloses a high-voltage current transformer for State Grid metering, which relates to the technical field of current transformers and includes a bottom plate and a current transformer housing. A lifting mechanism is installed inside the bottom plate, and an auxiliary support assembly is provided on the lifting mechanism. An auxiliary fixing assembly is installed inside the bottom plate. By using the movable fixing assembly, the staff can move the position of the fixing plate back and forth, 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 rods are aligned with the holes, thereby meeting the errors in the positions of the holes on the mounting platform within a certain range. The metal mounting plate is pushed by the pushing spring to move outward from the fixing rod, so that the upper surface of the metal mounting plate contacts the lower surface of the platform, forming a fixation. During the fixation 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 is stably stuck to the lower surface of the platform, thereby improving the installation stability.

Description

Technical Field

[0001] The present invention relates to the technical field of current transformers, and specifically to a high-voltage current transformer for State Grid metering. Background Technique

[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 and is usually used in power systems. During the use of high-voltage current transformers, multiple bolts are usually used for fixing. However, due to the differences in the sizes and opening positions of the screw holes on the installation surface and the opening positions on the current transformer, on-site drilling is sometimes required during the installation process, and the current transformer needs to be repeatedly lifted, resulting in troublesome operations. At the same time, during the use of existing high-voltage current transformers, all movements rely on equipment for lifting or manual handling. However, large high-voltage current transformers are relatively heavy, so the operation is very laborious. Moreover, the height of existing high-voltage current transformers cannot be adjusted after installation. When the height needs to be adjusted, the bolts need to be removed, and the high-voltage current transformer needs to be lifted by a lifting device, and the height is adjusted by adding gaskets, which is very troublesome. Therefore, we have proposed a high-voltage current transformer for State Grid metering. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a high-voltage current transformer for State Grid metering, which solves the problems mentioned in the above background technique.

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions: A high-voltage current transformer for State Grid metering includes a bottom plate and a current transformer housing. A lifting mechanism is installed inside the bottom plate, and an auxiliary support assembly is provided on the lifting mechanism. An auxiliary fixing assembly is installed inside the bottom plate, and a moving fixing assembly is provided inside the bottom plate. The current transformer housing is fixedly installed on the upper surface of the bottom plate;

[0005] The lifting mechanism includes a driving shaft and a driving rod. Both the driving rod and the driving shaft are rotatably installed 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 ends of the driving shaft, and rollers are installed at the ends of the support legs;

[0006] The auxiliary support assembly includes a telescopic rod and a driven shaft. The driven shaft is rotatably installed inside the bottom plate, and a telescopic rod is fixedly connected to the driven shaft. The telescopic rod is rotatably installed 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 a first sprocket, one end of the driven shaft is fixedly connected with a driven gear, a second sprocket is rotatably installed inside the bottom plate, both sides of the second sprocket are fixedly connected with driving gears, and the driving gears are engaged with the driven gear. A precision chain is installed on the second sprocket and the first sprocket.

[0014] Preferably, a storage groove is formed at the bottom of the bottom plate, the support leg is located inside the storage groove, and a rubber shock-absorbing plate is fixedly installed at the bottom of the bottom plate.

[0015] Preferably, a mounting hanging ring is installed on the bottom 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 wiring bolt is installed at the top of the current transformer housing, cooling covers are installed on both sides of the current transformer housing, and fins located inside the cooling covers 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 lead screw is rotatably connected to the middle of the top end of the current transformer housing, protective covers are threadedly installed at both ends of the bidirectional lead screw with opposite thread directions, through grooves are formed in the protective covers, and insulating rubber plates are fixedly connected to the inner cavities of the through grooves. Both sides of the protective cover are slidably sleeved on the surfaces of the guide columns, and a handle is provided at the end of the bidirectional lead screw.

[0017] Preferably, a fastening plate is rotatably installed inside the support leg through a shaft, a rectangular groove is formed at one end of the fastening plate, a fixing block is rotatably installed inside 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 State Grid metering, which has the following beneficial effects:

[0019] 1. For the high-voltage current transformer for State Grid metering, by using the moving and fixing assembly, the staff can move the position of the fixing plate back and forth, 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 holes, thereby meeting the errors in the positions of the holes on the mounting platform within a certain range. The metal mounting plate is pushed to move outwards from the outside of the fixing rod by the pushing spring, so that the upper surface of the metal mounting plate contacts the lower surface of the platform, forming a fixation. During the fixation 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 is stably stuck to the lower surface of the platform, thereby improving the mounting stability, and the operation is very simple.

[0020] 2This high-voltage current transformer for power grid metering, through the combined use of a lifting mechanism, an auxiliary support assembly, and an auxiliary fixing assembly, rotates the rocking rod to drive the rotating column and the driving rod to rotate, so that the driving shaft drives the supporting leg to rotate, causing the end position of the supporting leg to drop, making the rollers contact the ground, facilitating movement and transportation, and being more convenient during the movement process and the installation process. During the rotation of the driving shaft, it will drive the corresponding sprocket one to rotate. Sprocket one drives sprocket two and the driving gear to rotate through a precision chain. The driving gear drives the driven gear to rotate, making the rotation direction of the driven gear opposite to that of the corresponding sprocket one. At this time, the driven gear drives the driven shaft to rotate, so that the telescopic rod rotates in cooperation with the movement of the supporting leg, and the telescopic rod is used to support the supporting leg, thereby improving the supporting stability. After adjustment, release the rotating column. At this time, under the action of the traction spring, the pull rod resets, and the positioning tooth block resets and meshes with the positioning gear, thereby limiting the positioning gear, avoiding the rotation of the driving shaft, forming a locked state, avoiding loosening during movement or support, improving stability, and also avoiding accidentally touching the rocking rod to push the driving rod to rotate, improving safety and stability.

[0021] 3This high-voltage current transformer for power grid metering, through the combined use of a fastening plate and a fixing block, when it is necessary to raise the current transformer to a higher position for fixing, it is lifted by the lifting mechanism, the fastening plate is pulled to rotate, so that one end of the fastening plate contacts the installation surface, and then the fixing block is rotated to make the fixing block vertical. Bolts or fixing rods are used to pass through the holes on the installation platform for fixing, and the installation height can be adjusted arbitrarily within a certain range. Brief Description of the Drawings

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

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

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

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

[0026] Figure 5 is the present invention Figure 2 a schematic enlarged structural diagram of part A in;

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

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

[0029] Figure 8 Structural schematic diagram of the cross-section of the present invention;

[0030] Figure 9 For the present invention Figure 4 Structural schematic diagram of the unfolded structure in the present invention;

[0031] Figure 10 Structural schematic diagram of the fixing block of the present invention;

[0032] Figure 11 Structural schematic diagram of the present invention from a three-dimensional perspective;

[0033] Figure 12 For the present invention Figure 7 Enlarged structural schematic diagram at position B in the present invention.

[0034] In the figure: 1, bottom plate; 2, current transformer housing; 3, first sprocket; 4, storage groove; 5, support leg; 6, roller; 7, rotating rod; 8, rotating column; 9, rocking rod; 10, moving cavity; 11, positioning tooth block; 12, worm; 13, driving rod; 14, positioning gear; 15, sliding block; 16, traction spring; 17, wiring bolt; 18, driven gear; 19, second sprocket; 20, driving gear; 21, driving shaft; 22, pull rod; 23, telescopic rod; 24, driven shaft; 25, through groove; 26, fixing plate; 27, fin; 28, tapered fixing hole; 29, mounting hole; 30, moving groove; 31, rectangular groove; 32, positioning plate; 33, nut sinking groove; 34, guide rod; 35, metal rope; 36, rotating dial; 37, guide plate; 38, metal mounting plate; 39, pushing spring; 40, positioning pin; 41, cooling cover; 42, rotating rod; 43, rotating plate; 44, fixing rod; 45, tapered limit pin; 46, rubber shock-absorbing plate; 47, guide post; 48, insulating rubber plate; 49, protective cover; 50, fastening plate; 51, fixing block; 52, bidirectional lead screw. Detailed implementation manners

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

[0036] Please refer to Figures 1 to 12 , the present invention provides a technical solution: a high-voltage current transformer for State Grid metering, including 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 moving 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. Both the driving rod 13 and the driving shaft 21 are rotatably installed 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 the surfaces at both ends 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 installed inside the bottom plate 1, and a telescopic rod 23 is fixedly connected to the driven shaft 24. The telescopic rod 23 is rotatably installed on the upper surface of the support leg 5.

[0039] The moving and fixing assembly includes a fixing rod 44, a moving groove 30, and a fixing plate 26. Guide plates 37 are fixedly connected to both sides inside the fixing rod 44. A metal mounting plate 38 is slidably installed on the surface of the guide plate 37. A pushing spring 39 is movably sleeved on the surface of the guide plate 37, and both ends of the pushing 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 opened on the upper surface of the bottom plate 1, and moving grooves 30 are opened inside the bottom plate 1 and on both sides of the through groove 25. A fixing plate 26 is slidably installed in the inner cavity of the moving groove 30. Positioning plates 32 are slidably installed inside both ends of the fixing plate 26. A conical limiting nail 45 is fixedly connected to the lower surface of the fixing plate 26. Conical fixing holes 28 are opened inside the bottom plate 1 and at the bottom of the inner cavity of the moving groove 30.

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

[0042] An installation hole 29 is opened in the middle of the fixing plate 26. A nut sinking groove 33 is opened on the upper surface of the fixing plate 26 and outside the installation hole 29. The fixing rod 44 is sleeved into the inner cavity of the installation hole 29. A rotating rod 42 is rotatably installed in the middle of the fixing rod 44. Metal ropes 35 are fixedly connected to both sides of the rotating rod 42. The metal ropes 35 penetrate through the guide plates 37 and are fixedly connected to the inner cavity ends of the metal mounting plates 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 dial 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, due to the differences in the sizes of the screw holes on the installation surface and the opening positions sometimes being different from the opening positions on the bottom plate 1, during the installation process, on-site drilling is sometimes required, and the current transformer needs to be repeatedly lifted, resulting in troublesome operations. Moreover, multiple bolts need to be installed and tools are required for tightening, and the operation is also rather cumbersome.

[0044] During use, the current transformer is lifted onto the installation platform by using a lifting device. The staff can lift the fixing plate 26 upward. At this time, the conical limit pin 45 is disengaged from the inner cavity of the conical fixing hole 28, and then the position of the fixing plate 26 is moved back and forth, left and right, so that the mounting holes 29 on the fixing plate 26 are aligned with the holes on the installation platform, that is, the fixing rod 44 is aligned with the holes, thereby accommodating the errors in the positions of the holes on the installation platform within a certain range.

[0045] Then release the fixing plate 26. At this time, under the action of the spring, the support plate moves downward, thereby pushing the fixing plate 26 downward, so that the conical limit pin 45 at the bottom of the fixing plate 26 is inserted into the inner cavity of the conical fixing hole 28. Press down the fixing rod 44 so that the fixing rod 44 is inserted into the hole. Then pull out the positioning pin 40. At this time, when the spring 39 is not limited, it will push the metal mounting plate 38 to move outward from the outside of the fixing rod 44, so that the upper surface of the metal mounting plate 38 contacts the lower surface of the platform, forming a fixation. During the fixation 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 is stably stuck to the lower surface of the platform, thereby improving the installation stability, and the operation is very simple, only need to pull out the positioning pin 40 and press it.

[0046] The auxiliary fixing component includes a pull rod 22, a positioning tooth 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 bottom plate 1. A moving cavity 10 is opened inside the bottom plate 1 and on one side of the positioning gear 14. The positioning tooth block 11 is fixedly connected to the bottom of the pull rod 22 and located inside the moving cavity 10. The moving cavity 10 meshes with the positioning gear 14. One end of the pull rod 22 is fixedly connected to a sliding block 15. One end of the sliding block 15 is fixedly connected to a traction spring 16, and the traction spring 16 is fixedly connected to the inner wall of the bottom plate 1.

[0047] The driving rod 13 is provided with two sets of worm segments, and the thread patterns on the two sets of worm segments are opposite. The driving rod 13 meshes with the worm gear 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 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 inside the cavity of the rotating column 8.

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

[0049] A storage groove 4 is formed at the bottom of the bottom plate 1. The support leg 5 is located inside the cavity of the storage groove 4. A rubber shock-absorbing plate 46 is fixedly installed at the bottom of the bottom plate 1.

[0050] First, pull the rotating column 8 outwards, so that the rotating column 8 moves outwards and then drives the pull rod 22 to move through the rotating rod 7, so that the positioning tooth block 11 moves and separates from the positioning gear 14. By rotating the rocking rod 9, the rotating column 8 and the driving rod 13 are driven to rotate. The worm section on the driving rod 13 drives two worm wheels 12 to rotate counterclockwise and clockwise respectively, so that the driving shaft 21 drives the support leg 5 to rotate, the end position of the support leg 5 drops, and the roller 6 contacts the ground, which is convenient for moving and conveying, and is more convenient during the moving process and the installation process.

[0051] During the rotation of the driving shaft 21, the corresponding first sprocket 3 is driven to rotate. The first sprocket 3 drives the second sprocket 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 rotation direction of the driven gear 18 is opposite to that of the corresponding first sprocket 3. At this time, the driven gear 18 drives the driven shaft 24 to rotate, so that the driven shaft 24 rotates, and the telescopic rod 23 rotates in cooperation with the movement of the support leg 5. The telescopic rod 23 supports the support leg 5, thereby improving the support stability.

[0052] After adjustment, release the rotating column 8. At this time, under the action of the traction spring 16, the pull rod 22 resets, and the positioning tooth block 11 resets and meshes with the positioning gear 14, thereby limiting the positioning gear 14, avoiding the rotation of the driving shaft 21, forming a locked state, avoiding loosening during the moving or supporting process, improving stability, and also avoiding accidentally touching the rocking rod 9 to push the driving rod 13 to rotate, improving safety and stability.

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

[0054] Installation lifting rings are 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. Wiring bolts 17 are installed at the top of the current transformer housing 2. Cooling covers 41 are installed on both sides of the current transformer housing 2. Fins 27 located inside the cooling covers 41 are connected to both sides of the current transformer housing 2.

[0055] By pouring a coolant into the inner cavity of the cooling cover 41, heat absorption can be achieved through the cooperation of the coolant and the fins 27, thereby avoiding high temperatures 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. A bidirectional lead screw 52 is rotatably connected to the middle of the top end of the current transformer housing 2. Protective covers 49 are threadedly installed at both ends of the bidirectional lead screw 52 with opposite thread directions. Through grooves are formed in the protective covers 49, and insulating rubber plates 48 are fixedly connected to the inner cavities of the through grooves. Both sides of the protective covers 49 are slidably sleeved on the surfaces of the guide columns 47, and a handle is provided at the end of the bidirectional lead screw 52.

[0057] During wiring, the two protective covers 49 are separated by turning the handle for wiring. After wiring, the bidirectional lead screw 52 is rotated in the reverse direction, and then the two protective covers 49 are closed. The insulating rubber plate 48 squeezes the circuit, thereby fitting around the circuit and protecting the wiring bolts 17 at the top of the current transformer housing 2, thus avoiding failures of the wiring bolts 17 caused by dust, water stains, etc. contacting the wiring bolts 17 and improving the use safety.

[0058] A fastening plate 50 is rotatably installed inside the support leg 5 through a shaft. A rectangular groove 31 is formed at one end of the fastening plate 50. A fixing block 51 is rotatably installed 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] Rubber is provided on the outer side of the fastening plate 50, and the fastening plate 50 contacts the inside of the support leg 5 through the rubber. During the storage process, the position of the fastening plate 50 is limited by squeezing the rubber, thus avoiding detachment.

[0060] During the installation process, if it is necessary to raise the current transformer to a higher position for fixation, at this time, it can be lifted by a lifting mechanism, and the fastening plate 50 is pulled to rotate by the pull ring at the bottom of the fastening plate 50, so that one end of the fastening plate 50 contacts the installation surface. Then the fixing block 51 is rotated to make the fixing block 51 vertical, and bolts or fixing rods 44 are used to pass through the holes on the installation platform for fixation, and the installation height can be adjusted arbitrarily within a certain range.

[0061] In summary, when the high-voltage current transformer for power grid metering is in use, during the installation process, first, pull the rotating column 8 outward, so that the rotating column 8 moves outward and then drives the pull rod 22 to move through the rotating rod 7, making the positioning tooth block 11 move and separate from the positioning gear 14. By rotating the rocking rod 9, the rotating column 8 and the driving rod 13 are driven to rotate. The worm section on the driving rod 13 drives two worm wheels 12 to rotate counterclockwise and clockwise respectively, so that the driving shaft 21 drives the support leg 5 to rotate, causing the end position of the support leg 5 to drop and the roller 6 to contact the ground;

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

[0063] Lift the current transformer onto the installation platform by using a hoisting device, so that the roller 6 contacts the installation platform. The staff can first adjust the position of the current transformer. After adjustment, repeat the above operation to control the roller 6 to reset. At this time, 46 contacts the platform surface;

[0064] The staff can lift the fixing plate 26 upward. At this time, the conical limit pin 45 is separated from the inner cavity of the conical fixing hole 28, and then move the fixing plate 26 back and forth, left and right, so that the mounting hole 29 on the fixing plate 26 is aligned with the hole on the installation platform, that is, the fixing rod 44 is aligned with the hole, thereby meeting the error of the hole position on the installation platform within a certain range;

[0065] Then release the fixing plate 26. At this time, under the action of the spring, the support plate moves downward, thereby pushing the fixing plate 26 downward, so that the conical limit pin 45 at the bottom of the fixing plate 26 is inserted into the inner cavity of the conical fixing hole 28, and press down the fixing rod 44 to insert the fixing rod 44 into the hole. Then pull out the positioning pin 40. At this time, the pushing spring 39 has no limit and will push the metal mounting plate 38 to move outward from the fixing rod 44, so that the upper surface of the metal mounting plate 38 contacts the lower surface of the platform, forming a fixation. During the fixation process, the current transformer can be pressed down, thereby compressing the rubber damping plate 46 at the bottom of the bottom plate 1, so that the upper surface of the metal mounting plate 38 is stably stuck to the lower surface of the platform;

[0066] Secondly, during the installation process, once the thickness of the installation platform is relatively thin or loosening occurs 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, separate the two groups of protective covers 49 by rotating the handle for wiring. After wiring, rotate the bidirectional lead screw 52, and then close the two groups of protective covers 49. Extrude the circuit through the insulating rubber plate 48, and that's it.

[0068] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes 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).

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