Auxiliary equipment for installing current transformer

Abstract

The utility model belongs to the field of electric power overhaul auxiliary equipment, and particularly relates to auxiliary equipment for installing a current transformer. Comprising a placing platform used for placing a current transformer; the placement platform is located on the horizontal centering mechanism, and a transverse movement module and a longitudinal movement module on the horizontal plane are arranged on the centering mechanism; the lifting mechanism is located below the alignment centering mechanism; the current transformer is placed on the placing platform, and rapid installation can be carried out after connecting holes in the upper side and the lower side of the current transformer and installation holes in an installation plate in a switch cabinet are centered through the lifting mechanism and the horizontal centering mechanism. And the placing platform, the horizontal centering mechanism and the lifting mechanism are carried on the walking mechanism. And the traveling mechanism can complete the required transfer in the mounting process.

Description

Technical Field

[0001] This application belongs to the field of auxiliary equipment for power maintenance, and specifically relates to an auxiliary device for the installation of current transformers. Background Technology

[0002] Current transformers are housed in metal-clad switchgear in substations during operation. These switchgear units have a very small footprint and are constructed with high-quality aluminum-zinc steel plates. The current transformers are located in the cable compartment beneath the cabinet. Besides the current transformers, the cable compartment also contains cables, grounding switches, surge arresters, and other primary equipment. Every year, new power supply bays are expanded in substations, and temporary maintenance work is carried out.

[0003] Furthermore, the 10kV current transformer undergoes routine maintenance every 6 years and major overhauls, upgrades, and replacements every 15 years or more, with the 10kV switchgear current transformer replacement work exceeding 100 times.

[0004] The traditional method for installing current transformers in 10kV switchgear requires at least three people. One person crouches down and crawls into the narrow cable compartment to lift the current transformer, which weighs 25-40kg. A second maintenance worker outside the cabinet then attaches a rope to the current transformer and uses the rope to lift it upwards. The position of the mounting hole is repeatedly adjusted until it aligns with the equipment mounting hole, and the current transformer reaches the designated position. The third maintenance worker outside the cabinet then uses bolts to secure the equipment, completing the installation of the current transformer.

[0005] The average replacement time for a single current transformer is 40 minutes, while some production technology departments require the replacement time to be reduced to less than 15 minutes.

[0006] Therefore, a device is needed that can quickly enter the cable compartment and smoothly lift the current transformer to the designated position, so as to shorten the replacement time of the current transformer in the 10kV switchgear and improve work efficiency. Utility Model Content

[0007] The technical problem this application aims to solve is to provide an auxiliary device for efficiently installing current transformers in switchgear, improving installation efficiency from aspects such as transportation, lifting and hoisting, and alignment of mounting holes. To solve the above problem, the technical solution provided in this application is as follows:

[0008] An auxiliary device for installing a current transformer includes:

[0009] A platform for placing current transformers;

[0010] A horizontal centering mechanism is provided, with a platform located on it. The horizontal centering mechanism is equipped with transverse and longitudinal motion modules on a horizontal plane.

[0011] The lifting mechanism is located below the horizontal alignment mechanism. The current transformer is placed on the placement platform, and after the lifting mechanism and the horizontal alignment mechanism align the connection holes on the upper and lower sides of the current transformer with the mounting holes on the mounting plate in the switch cabinet, it can be quickly installed.

[0012] The traveling mechanism, including the platform, horizontal alignment mechanism, and lifting mechanism, is mounted on it. The traveling mechanism allows for the necessary transportation during installation.

[0013] Furthermore, the upper surface of the placement platform is equipped with several fastening mechanisms, including protrusions on the placement platform and fastening nuts perpendicular to the protrusions. The protrusions are symmetrically arranged on the left and right sides of the placement platform, and the fastening nuts face towards the center. When the current transformer is placed on the placement platform, the fastening nuts on both sides are tightened to clamp it, which temporarily fixes the current transformer to be installed. This improves stability during transportation and reduces the difficulty of alignment during the alignment operation.

[0014] Furthermore, the lower surface of the platform is provided with several transverse guide supports, and the transverse guide supports are provided with transverse guide holes.

[0015] Furthermore, a longitudinal moving part is provided below the placement platform, and a transverse guide rod is provided above the longitudinal moving part to cooperate with the transverse guide hole.

[0016] The sliding connection between the transverse guide hole and the transverse guide rod allows the placement platform to move laterally on the horizontal plane, facilitating lateral adjustment during centering.

[0017] Furthermore, a longitudinal guide support is provided at the lower part of the longitudinal moving part, and a longitudinal guide hole is provided on the longitudinal guide support.

[0018] Furthermore, below the longitudinal moving part is a lifting platform, on which a longitudinal guide rod is provided that mates with the longitudinal guide hole.

[0019] The sliding connection between the longitudinal guide hole and the longitudinal guide rod allows the platform to move longitudinally on the horizontal plane, making it easier to pull the connection hole (located on the current transformer) and the mounting hole (located inside the switch cabinet) closer together after alignment for convenient installation.

[0020] Furthermore, a threaded seat parallel to the transverse guide support and the longitudinal guide support are respectively provided on one side, and a threaded hole parallel to the transverse guide hole and the longitudinal guide hole are respectively provided on the threaded seat.

[0021] Specifically, the bottom of the placement platform and the bottom of the longitudinal moving part are respectively provided with mutually perpendicular threaded seats with threaded holes.

[0022] The device also includes adjusting screws, which are connected to corresponding threaded holes. These screws drive two adjusting rods to rotate, allowing for lateral and longitudinal adjustments respectively.

[0023] Furthermore, symmetrical support rods are arranged below the lifting platform, which are crossed and hinged in the middle. The front end of the support rod is the connecting end. The first connecting end located above is hinged to the front side of the lifting platform, and the second connecting end located below is hinged to the front end of the traveling mechanism.

[0024] The end of the support rod is a movable end. The first movable end located at the top is in rolling or sliding contact with the bottom surface of the lifting platform; the second movable end located at the bottom is in rolling contact with or sliding away from the upper surface of the traveling mechanism.

[0025] Lifting and lowering are achieved by changing the angle of the central hinge.

[0026] Furthermore, a connecting rod is provided between the second moving ends, and the two ends of the connecting rod are respectively connected to the bearings of the second moving ends located on both sides. A lifting threaded hole is provided in the middle of the connecting rod, and a lifting drive rod is also provided on the traveling mechanism. The lifting drive rod has threads that cooperate with the lifting threaded hole.

[0027] A crank is provided at one end of the lifting drive rod.

[0028] When the crank handle is turned in the forward direction, the connecting rod gradually moves closer to the front end, changing the included angle of the central hinge. The first connecting end and the first moving end rise, driving the lifting platform to rise. When the crank handle is turned in the reverse direction, the connecting rod gradually moves away from the front end, and the first connecting end and the first moving end fall, driving the lifting platform to fall. The vertical alignment of the connecting hole and the mounting hole is achieved by rotating in the forward / reverse direction.

[0029] Furthermore, the walking mechanism is a trolley with casters at the bottom. A detachable handle is provided on the front of the trolley. The handle is used to hold and move the trolley. After the trolley is pushed into the switch cabinet, the handle can be temporarily removed to facilitate centering operation and subsequent installation operation, thereby expanding the operating space and improving operating efficiency.

[0030] The beneficial effects of this application are as follows:

[0031] 1. This auxiliary installation equipment, through the coordinated operation of a placement platform, a horizontal alignment mechanism, a lifting mechanism, and a traveling mechanism, enables rapid transfer, precise alignment, and efficient installation of current transformers. Compared to the traditional method requiring three people and an average replacement time of 40 minutes, this equipment can reduce the replacement time to less than 15 minutes, meeting the high-efficiency requirements of the production technology department and significantly improving the work efficiency of replacing 10kV switchgear current transformers.

[0032] 2. Traditional installation requires at least 3 people and is complex to operate (including crawling into narrow cable rooms, rope lifting, etc.). This equipment reduces the reliance on multiple people through automated horizontal centering (lateral and longitudinal adjustment) and lifting functions. Theoretically, it can be operated by 1-2 people, reducing labor costs and the difficulty of coordination.

[0033] 3. The equipment is equipped with a horizontal alignment mechanism (lateral guide hole / rod, longitudinal guide hole / rod, and adjusting screw), which can precisely adjust the position of the current transformer connection hole and the switchgear mounting hole. Through mechanized lateral and longitudinal movement, it replaces the inefficient traditional method of repeated manual adjustments, significantly improving the accuracy and speed of mounting hole alignment.

[0034] 4. The fastening mechanism (protrusions and fastening nuts) on the platform can firmly clamp current transformers weighing 25-40kg, ensuring their stability during transportation and alignment. This not only prevents the equipment from sliding or tipping over, but also reduces the difficulty of alignment caused by transformer movement, improving operational safety and reliability.

[0035] 5. The lifting mechanism achieves smooth up-and-down adjustment through cross support rods and a lifting drive rod (in conjunction with a crank handle), enabling precise alignment with the height of the mounting plate inside the switchgear. Lifting and lowering are achieved by turning the crank handle in either the forward or reverse direction, making operation simple and flexible, and adaptable to the installation requirements of different switchgear.

[0036] 6. The traveling mechanism adopts a trolley design equipped with casters, which facilitates the quick pushing of the equipment into the cable compartment of the switchgear. The detachable handle on the front of the trolley further optimizes the operating space. The handle can be removed during the alignment and installation phases to expand the operating area and improve operating efficiency and comfort.

[0037] 7. In traditional methods, maintenance personnel need to crawl into narrow cable rooms and lift heavy objects, posing significant safety hazards. This equipment eliminates the need for personnel to enter confined spaces through mechanized transport and lifting, reducing safety risks caused by physical exertion or improper operation.

[0038] 8. This equipment is suitable for various scenarios such as new power supply bays in substations, temporary defect elimination, routine maintenance (6-year cycle), and major overhaul and technical upgrades (replacement after 15 years or more). Its modular design (placement platform, centering mechanism, lifting mechanism, etc.) can be adapted to different models of current transformers, and has high versatility and flexibility.

[0039] 9. The equipment adopts a mechanized adjustment method (such as screw, crank, etc.), eliminating the need for a complex electronic control system. Its simple structure makes it easy to maintain and operate. Even in the field environment of a substation, maintenance personnel can quickly learn to use it, reducing training costs. Attached Figure Description

[0040] Figure 1 This is a side view of an embodiment of this application;

[0041] Figure 2 This is a perspective view of an embodiment of this application;

[0042] Figure 3 This is a perspective view of an embodiment of this application;

[0043] Figure 4 , 5 6 is a schematic diagram of the platform placement in the embodiments of this application;

[0044] Figure 7 This is a schematic diagram of an embodiment of the present application equipped with a current transformer;

[0045] Figure 8 , 9 This is a schematic diagram of the installation in the switch cabinet according to an embodiment of this application.

[0046] In the diagram: 1. Chassis; 2. Disassembly / removal hole; 3. Push-pull handle; 4. Front panel; 5. Support hinge shaft; 6. Support rod; 7. Hinge rod; 8. Lifting platform; 9. Lifting hinge shaft; 10. Connecting rod; 11. Lifting adjustment threaded rod; 12. Turntable; 13. Crank handle; 14. Longitudinal guide rod; 15. Longitudinal adjustment threaded rod; 17. Threaded adjustment seat; 18. Longitudinal guide seat; 19. Moving plate; 20. Vertical plate; 21. Lateral guide rod; 22. Lateral adjustment threaded rod; 23. Lateral guide seat; 24. Lateral adjustment threaded seat; 25. Protrusion; 26. Fastening nut; 27. Vertical plate; 28. Main housing; 29. ​​Connection hole; 30. Switch cabinet; 31. Mounting plate; 32. Mounting hole. Detailed Implementation

[0047] like Figure 1-6 As shown, an auxiliary device for installing a current transformer includes a trolley chassis 1. The main body of the chassis 1 is an angle steel frame, and four universal wheels with brakes are set at the four corners of the bottom. An inclined mounting hole 2 is provided on one side of the trolley for detachable installation of a push-pull handle 3.

[0048] With the side where the push-pull handle 3 is installed as the front side, two support hinge shafts 5 parallel to the front plate 4 are symmetrically arranged on the left and right sides of the chassis 1 near the front side. The front end of a support rod 6 is hinged to each of these two support hinge shafts 5. A hinge position is set in the middle of the support rods 6 on both sides, and a hinge rod 7 of the same specification as the aforementioned support rod 6 is hinged to each of them, so that they form a cross shape and form an X-shaped lifting rod.

[0049] The front end of the hinge rod 7 is hinged to the lifting hinge shaft 9 at the front end of the lifting platform 8. The lifting hinge shaft 9 is parallel to the supporting hinge shaft 5 and is also located on both sides of the bottom of the lifting platform 8.

[0050] A bearing is installed at the end of the support rod 6, and the outer ring of the bearing rolls with the bottom surface of the lifting platform 8.

[0051] A bearing is installed at the end of the hinge rod 7, and the outer ring of the bearing is in rolling contact with the upper surface of the chassis 1 (the upper surface of the side plate of the angle steel on both sides of the chassis 1 parallel to the bottom surface).

[0052] A connecting rod 10 is provided between the ends of the two hinge rods 7, and the connection between the connecting rod 10 and the hinge rod 7 is made by means of bearings or other means that allow relative rotation.

[0053] A threaded hole is provided in the middle of the connecting rod 10. The axis of the threaded hole is perpendicular to the front plate 4. A support hole is provided on the front plate 4 coaxial with the threaded hole.

[0054] The lifting and adjusting threaded rod 11 is fixed in the support hole by a bearing, and the threaded part at the rear end passes through the threaded hole. A turntable 12 is set at the front end of the lifting and adjusting threaded rod 11, and a crank 13 is set on the turntable 12. The overall lifting and lowering is achieved by lifting and adjusting the threaded rod 11 in forward and reverse directions.

[0055] A through hole is made near the front of the lifting platform 8 (because the support point of the lifting platform 8 will gradually move forward during the lifting process, the through hole is made near the front for the installation of other load-bearing components).

[0056] Two longitudinal guide rods 14 are installed from front to back in the through hole, and support holes are also opened on the front and rear plates of the lifting platform 8 for installing longitudinal adjusting threaded rods 15.

[0057] In this embodiment, the longitudinal moving component is a moving plate 19. A threaded adjustment seat 17 is provided at the bottom of the moving plate 19. A threaded hole coaxial with the longitudinal adjusting threaded rod 15 is opened in the middle of the threaded adjustment seat 17, which is used to cooperate with the longitudinal adjusting threaded rod 15 to adjust the position of the moving plate 19 longitudinally.

[0058] The threaded adjusting seat 17 is provided with longitudinal guide seats 18 on both sides. The longitudinal guide seats 18 are provided with longitudinal guide holes for cooperating with the longitudinal guide rod 14. In order to make it more stable, the longitudinal guide holes are located on both sides of the threaded hole.

[0059] Two upright plates 20 are set on the left and right sides of the top surface of the movable plate 19. Two parallel horizontal guide rods 21 are set between the upright plates 20. A support hole is opened on the upright plate 20 at the center position between the horizontal guide rods 21 for installing the horizontal adjustment threaded rod 22.

[0060] The bottom surface of the platform is also provided with a transverse guide seat 23 and a transverse adjusting thread seat 24. The transverse guide seat 23 is provided with a transverse guide hole that slides with the transverse guide rod 21, and the transverse adjusting thread seat 24 is provided with a threaded hole that cooperates with the transverse adjusting thread rod.

[0061] Four protrusions 25 are symmetrically arranged on the top surface of the platform, and fastening nuts 26 are installed on the protrusions 25.

[0062] When the device is loaded with a current transformer, such as Figure 7 As shown, the housing of the current transformer includes a front vertical plate and a main housing 28 connected to the vertical plate 27. The upper and lower edges of the vertical plate extend out of the upper and lower end faces of the main housing 28, respectively. Slots are formed at the extended positions as connection holes 29.

[0063] When this equipment is installed into switchgear 30, if Figure 8 , 9 As shown in the figure, to make the attached diagram simpler and easier to understand, the right side panel of switch cabinet 30 and other equipment inside the cabinet have been removed.

[0064] After pushing the trolley into the switch cabinet 30, press the universal wheel brake to fix the trolley, remove the push-pull handle 3, and manually crank the lifting adjustment threaded rod 11 to vertically align the connection hole 29 with the mounting hole 32 on the mounting plate 31 of the switch cabinet 30. Rotate the horizontal adjustment threaded rod 22 to horizontally align the connection hole 29 with the mounting hole 32. Then rotate the vertical adjustment threaded rod 15 to bring the two closer together before installation.

Claims

1. An auxiliary device for installing a current transformer, characterized in that, include: A placement platform for placing the device to be installed; A horizontal centering mechanism, wherein the placement platform is located on the horizontal centering mechanism, and the horizontal centering mechanism is provided with lateral and longitudinal movement modules on a horizontal plane; A lifting mechanism, located below the horizontal centering mechanism; The walking mechanism includes the placement platform, the horizontal centering mechanism, and the lifting mechanism, all mounted on the walking mechanism.

2. The auxiliary equipment as described in claim 1, characterized in that, The upper surface of the placement platform is provided with a plurality of fastening mechanisms, the fastening mechanisms including a protrusion (25) provided on the placement platform and a fastening nut (26) provided perpendicular to the protrusion (25).

3. The auxiliary equipment as described in claim 1, characterized in that, The lower surface of the placement platform is provided with several transverse guide supports, and the transverse guide supports are provided with transverse guide holes.

4. The auxiliary equipment as described in claim 3, characterized in that, A longitudinal moving part is provided below the placement platform, and a transverse guide rod (21) is provided on the upper part of the longitudinal moving part to cooperate with the transverse guide hole.

5. The auxiliary equipment as described in claim 4, characterized in that, The lower part of the longitudinal moving part is provided with a longitudinal guide support seat, and the longitudinal guide support seat is provided with a longitudinal guide hole.

6. The auxiliary equipment as described in claim 5, characterized in that, Below the longitudinal moving part is a lifting platform (8), and the lifting platform (8) is provided with a longitudinal guide rod (14) that is connected to the longitudinal guide hole.

7. The auxiliary equipment as described in claim 6, characterized in that, The transverse guide support and the longitudinal guide support are respectively provided with threaded seats parallel to them on one side, and the threaded seats are respectively provided with threaded holes parallel to the transverse guide hole and the longitudinal guide hole. The device also includes adjusting screws, which are connected to corresponding threaded holes.

8. The auxiliary equipment as described in claim 7, characterized in that, The lifting platform (8) is symmetrically provided with cross-shaped and hinged support rods (6) at the middle. The front end of the support rod (6) is a connecting end. The first connecting end located above is hinged to the front side of the lifting platform (8), and the second connecting end located below is hinged to the front end of the walking mechanism. The end of the support rod (6) is a movable end. The first movable end located above makes rolling or sliding contact with the bottom surface of the lifting platform (8); the second movable end located below makes rolling contact or sliding contact with the upper surface of the walking mechanism.

9. The auxiliary equipment as described in claim 8, characterized in that, A connecting rod (10) is provided between the second moving ends. The two ends of the connecting rod (10) are respectively connected to the bearings of the second moving ends located on both sides. A lifting threaded hole is provided in the middle of the connecting rod (10). A lifting drive rod is also provided on the walking mechanism. The lifting drive rod has a thread that mates with the lifting threaded hole. A crank (13) is provided at one end of the lifting drive rod.

10. The auxiliary device as described in any one of claims 1-9, characterized in that, The walking mechanism is a trolley with casters at the bottom and a detachable handle on the front side of the trolley.

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