Special tool for replacing current transformer of switch cabinet

Abstract

The invention relates to a special tool for replacing a current transformer of a switch cabinet. The special tool comprises a transfer trolley, a bearing table is arranged above the transfer trolley, a lifting frame is arranged between the bearing table and the transfer trolley, cross rods are arranged in the lifting frame, the ends of the cross rods are connected with connecting rods, a lifting hydraulic cylinder is arranged between the connecting rods, and the lifting hydraulic cylinder is connected with the bearing table. Rod frames are arranged on the front side and the rear side of the bearing table, a moving plate is arranged between the rod frames, and a clamping mechanism is arranged on the outer side of the moving plate; through the integrated arrangement of the transfer trolley, the lifting frame, the bearing table and other structures, the current transformer can be easily placed in the switch cabinet, the installation and replacement time is remarkably shortened, and the device can be widely applied to different types of switch cabinets and current transformer replacement scenes.

Description

Technical Field

[0001] The invention belongs to the technical field of current transformer replacement equipment, and in particular relates to a special tool for replacing a current transformer in a switch cabinet. Background Art

[0002] With the rapid development of the economy, people's demand for electricity consumption is increasing, and the requirements for the reliability of power supply from the power grid are also increasing. In the power system, the switchgear is a key distribution equipment, and the maintenance and replacement of its internal components are an important part of ensuring the stable operation of the power system. As an important component in the switchgear, the current transformer is used to measure and protect the current in the circuit, and its performance directly affects the accuracy and safety of the power system. However, in the actual operation and maintenance process, the current transformer often needs to be replaced due to equipment aging, damage or upgrade requirements. The traditional method of replacing current transformers often relies on manual handling and manual adjustment, which is not only inefficient, but also has safety risks. Especially in high-voltage and high-current environments, manual operation is more likely to cause accidents. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a special tool for replacing a current transformer in a switch cabinet.

[0004] The object of the present invention is achieved in this way: a special tool for replacing a current transformer in a switch cabinet comprises a transfer trolley, a supporting platform is arranged above the transfer trolley, a lifting frame is arranged between the supporting platform and the transfer trolley, a cross rod is arranged inside the lifting frame, connecting rods are connected to the ends of the cross rods, a lifting hydraulic cylinder is arranged between the connecting rods, a rod frame is arranged on the upper side of the supporting platform, a shift plate is arranged between the rod frames, and a clamping mechanism is arranged on the outer side of the shift plate.

[0005] The bottom of the transfer trolley is provided with moving wheels, and the outer side of the moving wheels is provided with locking plates.

[0006] A slide groove is arranged inside the rod frame, and the shift plate is inserted into the slide groove through a sliding block.

[0007] A sleeve is arranged at the rear end of the moving plate, an internal thread is arranged inside the sleeve, a translation motor is arranged at one side of the rod frame close to the sleeve, a translation screw is arranged at the output end of the translation motor, and the sleeve and the translation screw are threadedly connected to each other.

[0008] A limiting block is arranged inside a side of the rod frame away from the sleeve, the limiting block is fixedly connected to the sliding block, and a roller is arranged at the bottom of the limiting block.

[0009] The clamping mechanism includes a base and a clamping rod. The base is fixedly connected to the movable plate through a fixed block. A clamping hydraulic cylinder is arranged inside the base. A driving head is arranged at the end of the clamping hydraulic cylinder. Sleeves are symmetrically fixedly arranged on both sides of the base. A sleeve shaft is movably arranged inside the sleeve. A pull rod is hingedly arranged between the sleeve shaft and the driving head. A chuck is arranged at the outer end of the sleeve shaft. The clamping rod is hinged to the chuck through a center pin. A clamping block is arranged at the outer end of the clamping rod.

[0010] The sleeve and the sleeve shaft are both square in shape.

[0011] A push pin is arranged at the outer end of the clamp, and a buffer spring is arranged between the clamp rod and the push pin.

[0012] A bottom support is arranged at the bottom of the clamping block.

[0013] Beneficial effects of the present invention: Through the integrated transfer trolley, lifting frame, supporting platform and other structures, the current transformer can be easily placed inside the switch cabinet, significantly shortening the installation and replacement time. The application of lifting hydraulic cylinders and translation motors realizes automated operation and further improves work efficiency. The supporting platform and the clamping mechanism can stably support and fix the current transformer to prevent it from slipping or being damaged during the replacement process. The precise control of the lifting frame and the translation motor enables the supporting platform and the shifting plate to move along a predetermined trajectory, ensuring the accurate positioning of the current transformer during the replacement process, which helps to reduce equipment damage or personal injury caused by improper operation. The design of the clamping mechanism adopts adjustable clamping blocks and buffer springs, which can adapt to current transformers of different sizes and shapes. This flexibility enables the device to be widely used in different types of switch cabinets and current transformer replacement scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall front view of the special tool for replacing the current transformer of the switch cabinet of the present invention.

[0015] Figure 2 A front view of a cross bar of a special tool for replacing a current transformer in a switch cabinet according to the present invention.

[0016] Figure 3 A top view of a cross bar of a special tool for replacing a current transformer in a switch cabinet according to the present invention.

[0017] Figure 4 A structural diagram of a support platform for replacing a special tool for a current transformer in a switch cabinet according to the present invention.

[0018] Figure 5 This is a top view of the interior of the support platform of the special tool for replacing the current transformer of the switch cabinet of the present invention.

[0019] Figure 6This is a structural diagram of the clamping mechanism of the special tool for replacing the current transformer of the switch cabinet of the present invention.

[0020] Figure 7 A top view of the clamping mechanism of the special tool for replacing the current transformer of the switch cabinet of the present invention.

[0021] In the figure: 1, transfer trolley 2, supporting platform 3, lifting frame 4, cross rod 5, connecting rod 6, lifting hydraulic cylinder 7, rod frame 8, shifting plate 9, clamping mechanism 10, moving wheel 11, slide 12, slider 13, sleeve 14, translation screw 15, translation motor 16, limit block 17, roller 18, base 19, clamping rod 20, fixed block 21, clamping hydraulic cylinder 22, driving head 23, pull rod 24, sleeve 25, sleeve shaft 26, center pin 27, clamping block 28, top pin 29, chuck 30, buffer spring 31, bottom support. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings. Example

[0023] like Figure 1-3 As shown, a special tool for replacing the current transformer of the switch cabinet comprises a transfer trolley 1, a supporting platform 2 is arranged above the transfer trolley 1, a lifting frame 3 is arranged between the supporting platform 2 and the transfer trolley 1, a cross rod 4 is arranged inside the lifting frame 3, a connecting rod 5 is connected to the end of the cross rod 4, a lifting hydraulic cylinder 6 is arranged between the connecting rods 5, a rod frame 7 is arranged on the upper side of the supporting platform 2, a shift plate 8 is arranged between the rod frames 7, and a clamping mechanism 9 is arranged on the outer side of the shift plate 8.

[0024] The bottom of the transfer trolley 1 is provided with moving wheels 10 , and the outer side of the moving wheels 10 is provided with locking plates.

[0025] When the present invention is used, the current transformer in the switch cabinet is first removed, and the transfer trolley 1 is pushed to the vicinity of the switch cabinet by the moving wheel 10, and the position is adjusted as needed. The moving wheel 10 is fixed with a locking plate to prevent the transfer trolley 1 from moving during operation. The lifting hydraulic cylinder 6 is operated, and the supporting platform 2 is raised to an appropriate height by adjusting the connecting rod 5 and the cross rod 4 so that the current transformer can be supported. The current transformer is positioned by clamping the two sides of the current transformer by the clamping mechanism 9, and the current transformer can be disassembled at this time. After the current transformer inside the switch cabinet is removed, the current transformer is replaced, and the replaced current transformer is placed on the supporting platform 2 and fixed by the clamping mechanism 9. The replaced current transformer is then placed inside the switch cabinet by the lifting frame 3 and the clamping mechanism 9, and the replaced current transformer is installed. The device has the advantages of improving replacement efficiency, enhancing safety, precise control, and easy operation and maintenance, which helps to improve the stability and reliability of the power system. Example

[0026] like Figure 1-5 As shown, a special tool for replacing the current transformer of the switch cabinet comprises a transfer trolley 1, a supporting platform 2 is arranged above the transfer trolley 1, a lifting frame 3 is arranged between the supporting platform 2 and the transfer trolley 1, a cross rod 4 is arranged inside the lifting frame 3, a connecting rod 5 is connected to the end of the cross rod 4, a lifting hydraulic cylinder 6 is arranged between the connecting rods 5, a rod frame 7 is arranged on the upper side of the supporting platform 2, a shift plate 8 is arranged between the rod frames 7, and a clamping mechanism 9 is arranged on the outer side of the shift plate 8.

[0027] For better effect, the bottom of the transfer trolley 1 is provided with a moving wheel 10, and a locking piece is provided on the outer side of the moving wheel 10. The locking piece on the moving wheel 10 ensures that the transfer trolley 1 can be firmly fixed on the ground when needed to prevent accidental movement.

[0028] For better effect, a slide groove 11 is arranged inside the rod frame 7, and the shift plate 8 is inserted into the slide groove 11 through a slider 12. The slider 12 can move along the slide groove 11, and the slider 12 and the slide groove 11 have a limiting effect on the shift plate 8.

[0029] For better effect, a sleeve 13 is provided at the rear end of the moving plate 8, an internal thread is provided inside the sleeve 13, a translation motor 15 is provided on the side of the rod frame 7 close to the sleeve 13, a translation screw 14 is provided at the output end of the translation motor 15, and the sleeve 13 and the translation screw 14 are threadedly connected to each other.

[0030] For better effect, a limit block 16 is provided inside the rod frame 7 at one side away from the sleeve 13, the limit block 16 is fixedly connected to the slider 12, and a roller 17 is provided at the bottom of the limit block 16. The limit block 16 moves inside the rod frame 7 following the sleeve 13, and the roller 17 can reduce the friction between the limit block 16 and the rod frame 7.

[0031] When the present invention is used, the current transformer in the switch cabinet is first removed, and the transfer trolley 1 is pushed to the vicinity of the switch cabinet by the moving wheel 10, and the position is adjusted as needed. The moving wheel 10 is fixed with a locking plate to prevent the transfer trolley 1 from moving during operation. The lifting hydraulic cylinder 6 is operated, and the supporting platform 2 is raised to an appropriate height by adjusting the connecting rod 5 and the cross rod 4 so that the current transformer can be supported. Further, in order to facilitate the movement of the moving plate 8 and the clamping mechanism 9, the translation screw 14 can be driven to rotate by the translation motor 15. Since the sleeve 13 and the translation screw 14 are screwed to each other, when the translation screw 14 rotates, the sleeve 13 will move along the axial direction of the translation screw 14. The movement of the sleeve 13 will drive the moving plate 8 connected thereto to move together. During the movement of the moving plate 8, the limit block 16 will move accordingly and maintain a fixed connection with the slider 12. The roller 17 at the bottom of the limit block 16 can reduce the friction and resistance during the movement process, so that the moving plate 8 moves more smoothly. Driven by the translation motor 15, the shift plate 8 is moved to an appropriate position so that the clamping mechanism 9 can accurately clamp the current transformer. The current transformer is positioned by clamping the two sides of the current transformer through the clamping mechanism 9, and the current transformer can be disassembled at this time. After the current transformer inside the switch cabinet is removed, the current transformer is replaced, and the replaced current transformer is placed on the support platform 2 and fixed by the clamping mechanism 9. The replaced current transformer is then placed inside the switch cabinet through the lifting frame 3 and the clamping mechanism 9, and the replaced current transformer can be installed. This device has the advantages of improving replacement efficiency, enhancing safety, precise control, and easy operation and maintenance, which helps to improve the stability and reliability of the power system. Example

[0032] like Figure 1-7 As shown, a special tool for replacing the current transformer of the switch cabinet comprises a transfer trolley 1, a supporting platform 2 is arranged above the transfer trolley 1, a lifting frame 3 is arranged between the supporting platform 2 and the transfer trolley 1, a cross rod 4 is arranged inside the lifting frame 3, a connecting rod 5 is connected to the end of the cross rod 4, a lifting hydraulic cylinder 6 is arranged between the connecting rods 5, a rod frame 7 is arranged on the upper side of the supporting platform 2, a shift plate 8 is arranged between the rod frames 7, and a clamping mechanism 9 is arranged on the outer side of the shift plate 8.

[0033] For better effect, the bottom of the transfer trolley 1 is provided with a moving wheel 10, and a locking piece is provided on the outer side of the moving wheel 10. The locking piece on the moving wheel 10 ensures that the transfer trolley 1 can be firmly fixed on the ground when needed to prevent accidental movement.

[0034] For better effect, a slide groove 11 is arranged inside the rod frame 7, and the shift plate 8 is inserted into the slide groove 11 through a slider 12. The slider 12 can move along the slide groove 11, and the slider 12 and the slide groove 11 have a limiting effect on the shift plate 8.

[0035] For better effect, a sleeve 13 is provided at the rear end of the moving plate 8, an internal thread is provided inside the sleeve 13, a translation motor 15 is provided on the side of the rod frame 7 close to the sleeve 13, a translation screw 14 is provided at the output end of the translation motor 15, and the sleeve 13 and the translation screw 14 are threadedly connected to each other.

[0036] For better effect, a limit block 16 is provided inside the rod frame 7 at one side away from the sleeve 13, the limit block 16 is fixedly connected to the slider 12, and a roller 17 is provided at the bottom of the limit block 16. The limit block 16 moves inside the rod frame 7 following the sleeve 13, and the roller 17 can reduce the friction between the limit block 16 and the rod frame 7.

[0037] For better effect, the clamping mechanism 9 includes a base 18 and a clamping rod 19. The base 18 is fixedly connected to the movable plate 8 through a fixed block 20. A clamping hydraulic cylinder 21 is arranged inside the base 18. A driving head 22 is arranged at the end of the clamping hydraulic cylinder 21. Sleeves 24 are symmetrically fixed on both sides of the base 18. A sleeve shaft 25 is movably arranged inside the sleeve 24. A pull rod 23 is hingedly arranged between the sleeve shaft 25 and the driving head 22. A chuck 29 is arranged at the outer end of the sleeve shaft 25. The clamping rod 19 is hinged to the chuck 29 through a center pin 26. A clamping block 27 is arranged at the outer end of the clamping rod 19.

[0038] For better effect, the sleeve 24 and the sleeve shaft 25 are both square in shape. The square design can prevent the sleeve shaft 25 from rotating inside the sleeve 24.

[0039] For better effect, a push pin 28 is provided at the outer end of the clamp 29 , and a buffer spring 30 is provided between the clamp rod 19 and the push pin 28 .

[0040] For better effect, a base 31 is provided at the bottom of the clamping block 27. The base 31 supports the current transformer and can increase the clamping stability between the clamping block 27 and the current transformer.

[0041] When the present invention is used, the current transformer in the switch cabinet is first removed, and the transfer trolley 1 is pushed to the vicinity of the switch cabinet by the moving wheel 10, and the position is adjusted as needed. The moving wheel 10 is fixed with a locking plate to prevent the transfer trolley 1 from moving during operation. The lifting hydraulic cylinder 6 is operated, and the supporting platform 2 is raised to an appropriate height by adjusting the connecting rod 5 and the cross rod 4 so as to support the current transformer. Further, the clamping mechanism is preferably: start the clamping hydraulic cylinder 21 to move the driving head 22 forward. Since the pull rod 23 is hinged between the sleeve shaft 25 and the driving head 22, as the driving head 22 moves, the pull rod 23 will pull the sleeve shaft 25 to slide in the sleeve 24, and the sleeve shaft 25 will move along the direction of the sleeve 24, and drive the clamps 29 to approach each other. The clamp rod 19 is connected to the clamp 29 through the center pin 26, and the clamp 29 will drive the clamp rod 19 to move together. As the clamp rod 19 moves, the clamping block 27 will gradually approach the current transformer and finally clamp it in place. The buffer spring 30 and the center pin 26 will buffer the clamp rod 19 to prevent the clamp block 27 from damaging the current transformer. The current transformer is positioned by clamping the two sides of the current transformer through the clamping mechanism 9, and the current transformer can be disassembled at this time. After the current transformer inside the switch cabinet is removed, the current transformer is replaced, and the replaced current transformer is placed on the supporting platform 2 and fixed by the clamping mechanism 9. The replaced current transformer is then placed inside the switch cabinet through the lifting frame 3 and the clamping mechanism 9, and the replaced current transformer can be installed. This device has the advantages of improving replacement efficiency, enhancing safety, precise control, and easy operation and maintenance, which helps to improve the stability and reliability of the power system.

Claims

1. Special tool for replacing current transformer in switch cabinet, which includes a transfer trolley, characterized by: A supporting platform is arranged above the transfer trolley, a lifting frame is arranged between the supporting platform and the transfer trolley, a cross rod is arranged inside the lifting frame, connecting rods are connected to the ends of the cross rods, a lifting hydraulic cylinder is arranged between the connecting rods, a rod frame is arranged on the upper side of the supporting platform, a shift plate is arranged between the rod frames, and a clamping mechanism is arranged on the outer side of the shift plate.

2. The special tool for replacing the switch cabinet current transformer according to claim 1, characterized in that: The bottom of the transfer trolley is provided with moving wheels, and the outer side of the moving wheels is provided with locking plates.

3. The special tool for replacing the current transformer of the switch cabinet according to claim 1, characterized in that: A slide groove is arranged inside the rod frame, and the shift plate is inserted into the slide groove through a sliding block.

4. The special tool for replacing the current transformer of the switch cabinet according to claim 3, characterized in that: A sleeve is arranged at the rear end of the moving plate, an internal thread is arranged inside the sleeve, a translation motor is arranged at one side of the rod frame close to the sleeve, a translation screw is arranged at the output end of the translation motor, and the sleeve and the translation screw are threadedly connected to each other.

5. The special tool for replacing the switch cabinet current transformer according to claim 4, characterized in that: A limiting block is arranged inside a side of the rod frame away from the sleeve, the limiting block is fixedly connected to the sliding block, and a roller is arranged at the bottom of the limiting block.

6. The special tool for replacing a switch cabinet current transformer according to claim 1, characterized in that: The clamping mechanism includes a base and a clamping rod. The base is fixedly connected to the movable plate through a fixed block. A clamping hydraulic cylinder is arranged inside the base. A driving head is arranged at the end of the clamping hydraulic cylinder. Sleeves are symmetrically fixedly arranged on both sides of the base. A sleeve shaft is movably arranged inside the sleeve. A pull rod is hingedly arranged between the sleeve shaft and the driving head. A chuck is arranged at the outer end of the sleeve shaft. The clamping rod is hinged to the chuck through a center pin. A clamping block is arranged at the outer end of the clamping rod.

7. The special tool for replacing the current transformer of the switch cabinet according to claim 6, characterized in that: The sleeve and the sleeve shaft are both square in shape.

8. The special tool for replacing a current transformer in a switch cabinet according to claim 7, characterized in that: A push pin is arranged at the outer end of the clamp, and a buffer spring is arranged between the clamp rod and the push pin.

9. The special tool for replacing a switch cabinet current transformer according to claim 8, characterized in that: A bottom support is arranged at the bottom of the clamping block.

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