CN115483636B - Special tools for replacing current transformers in switch cabinets - Google Patents

Abstract

The present invention provides a special tool for replacing a current transformer in a switch cabinet, and relates to the field of tools for replacing parts inside a substation, including a drive motor, wherein the drive motor is fixedly mounted on the front end face of a device box, the front end of the drive motor is transmission-connected with a drive shaft, and the rear end face of the drive shaft is rotationally connected to the rear end side plate of the device box. In the present invention, two magnets are also mounted on the upper end face of the device box, and screws can be fixed on the surface of the magnets to prevent the screws from scattering inside the switch cabinet; the vertical screw is threadedly connected to the sliding plate, so that after starting the drive motor, the placement plate can be driven to move upward, and the placement plate can play a supporting role for the current transformer, so as to avoid the problem of the current transformer falling when workers are disassembling it. The existing replacement method of manual handling and manual adjustment is solved, which not only has low work efficiency, but also has safety hazards, and the screws removed by workers are scattered in the cabinet, which is inconvenient for workers to collect.

Description

Special tools for replacing current transformers in switch cabinets

Technical Field

The invention relates to the field of tools for replacing internal parts of a transformer substation, and in particular to a special tool for replacing a current transformer in a switch cabinet.

Background technique

Nowadays, with the increasing utilization rate of 10kV center-mounted switchgear in substations, the number of dry-type current transformers in the cabinet is also increasing year by year, and the failure rate is also increasing year by year. However, a single 10kV dry-type current transformer is heavy (about 30 kg) and is installed in the middle part of the cabinet. The replacement space is small, and personnel need to bend their bodies inside the switchgear to operate. The work is complicated and difficult.

The current replacement method is the original manual handling and manual adjustment, which not only has low work efficiency and wastes manpower and time, but also has the risk of slipping out of the hands due to the heavy weight of the current transformer equipment, which poses certain safety hazards. At the same time, workers have to use a variety of tools when disassembling, which makes it inconvenient to replace tools, and the screws removed by workers are scattered in the cabinet, which makes it inconvenient to collect them.

Summary of the invention

In view of this, the present invention provides a special tool for replacing a current transformer in a switch cabinet, which has a group of hooks installed on the lower end surface of a placement plate, and workers hang commonly used tools on the hooks. Two magnets are also installed on the upper end surface of a device box, which can fix screws on the surface of the magnets to prevent the screws from scattering inside the switch cabinet; the active bevel gear is meshed with the passive bevel gear, and the vertical screw is threadedly connected to the sliding plate, so that after starting the driving motor, the placement plate can be driven to move upward. The placement plate can support the current transformer, thereby preventing the current transformer from falling when the workers are disassembling it, thereby improving safety.

The present invention provides the purpose and efficacy of a special tool for replacing a current transformer in a switch cabinet, specifically comprising: a bottom plate;

The bottom plate body is a long strip structure, and a device box is installed in the middle of the upper end surface of the bottom plate;

A drive motor, wherein the drive motor is fixedly mounted on the front end surface of the device box, the front end of the drive motor is drivingly connected to a drive shaft, and the rear end surface of the drive shaft is rotatably connected to the rear end side plate of the device box;

A fixed cylinder, the interior of which is a hollow structure, and the fixed cylinder is fixedly mounted on the upper end surface of the device box;

A vertical screw rod, the upper end surface of which is rotatably connected to the top plate of the fixed cylinder, the lower end of which passes through the top plate of the device box and is fixedly connected to the passive bevel gear, and the passive bevel gear is located inside the device box;

A sliding plate, wherein the sliding plate body is a circular plate structure, and a threaded hole is provided on the surface of the sliding plate;

An upper connecting plate, wherein the main body of the upper connecting plate is a circular plate-shaped structure, and four connecting rods are installed at the lower end of the upper connecting plate, and the lower ends of the connecting rods pass through the top plate of the fixed cylinder and are fixedly connected to the sliding plate;

A placement plate, wherein the upper end surface of the placement plate is provided with two transverse track grooves, the transverse track grooves are T-shaped structures, a fastening block is respectively provided inside the two transverse track grooves, and the lower end of the placement plate is fixedly connected to the upper connecting plate;

A sliding block, wherein two sliding blocks are symmetrically arranged, two fixed blocks are respectively installed at the left and right ends of the sliding block, and a first baffle is installed at the outer end position of the upper end surface of the sliding block;

The second baffles are symmetrically provided in two groups, and the inner end surfaces of the second baffles are inclined structures.

Furthermore, two magnets are installed on the upper end surface of the device box, and the magnets are long strip structures. Two groups of hooks are symmetrically installed on the lower end surface of the placement plate, and the number of hooks in each group is four.

Furthermore, a driving bevel gear is installed on the surface of the driving shaft, and the driving bevel gear is meshed with the passive bevel gear at the lower end of the vertical screw.

Furthermore, blocks are installed at both ends of the sliding plate, and two vertical track grooves are opened on the inner end surface of the fixed cylinder. The sliding plate is slidably mounted in the vertical track grooves on the inner end surface of the fixed cylinder through the blocks at both ends, and the sliding plate is threadedly connected to the vertical screw.

Furthermore, the fastening block body is a T-shaped structure, and two fastening screws are installed on the upper end surface of the fastening block. Through holes are opened on the surfaces of the fixed blocks at the left and right ends of the sliding block, and the fastening screws pass through the through holes on the surface of the fixed block and are fastened by nuts.

Furthermore, three fixing ear plates are installed on the outer end surface of the first baffle, and through holes in the upper and lower directions are opened on the surface of the fixing ear plates, and threaded holes are also opened on the outer end surface of the fixing ear plates.

Furthermore, three sliding vertical rods are installed on the lower end surface of the second baffle plate, and the sliding vertical rods are slidably clamped in the through holes on the surface of the fixed ear plate and fastened by bolts.

Beneficial effects:

1. The active bevel gear on the surface of the driving shaft is meshed with the passive bevel gear at the lower end of the vertical screw, so that the driving shaft can drive the rotation of the vertical screw when it rotates, and the vertical screw is threadedly connected to the sliding plate. The sliding plate is slidably mounted in the vertical track groove on the surface of the fixed cylinder through the blocks at both ends, so that the vertical screw can drive the sliding plate to move upward during rotation. When the upper end surface of the placement plate contacts the current transformer, the placement plate can support the current transformer to prevent the current transformer from falling when the workers are disassembling it, thereby bringing convenience to the workers' disassembly work and improving safety.

2. The fastening screw is clamped in the through hole on the surface of the fixing block. When the worker loosens the nut of the fastening screw, the position of the sliding block can be moved. When the worker tightens the nut on the surface of the fastening screw, the sliding block can be fixed on the upper end surface of the placement plate to fix the sliding block.

3. A first baffle is installed on the upper end surface of the sliding block. The first baffle can limit the current transformer to prevent the current transformer from shaking left and right after being removed. Different types of current transformers have different sizes. When replacing different types of current transformers, workers can adjust the distance between two adjacent sliding blocks according to the width of the current transformer, and the three sliding vertical rods at the lower end of the second baffle are clamped in the through holes on the surface of the fixed ear plate and fastened by bolts. Workers can adjust the total height of the first baffle and the second baffle, which is convenient for fixing current transformers of different types, thereby increasing the versatility of the device.

4. By setting two sets of hooks on the lower end of the placement plate, workers can hang commonly used tools on the hooks, which is convenient for workers to change tools. At the same time, two magnets are installed on the upper end of the device box. The two magnets are long strip structures. After the workers remove the screws or nuts, they can place the screws on the surface of the magnets. Through the attraction between the magnets and the screws, the screws can be fixed on the surface of the magnets, preventing the screws from scattering inside the switch cabinet, which increases the difficulty for workers to collect them.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

The drawings described below are only related to some embodiments of the present invention and are not intended to limit the present invention.

In the attached picture:

FIG1 is a schematic diagram of the overall structure of the device of the present invention;

FIG2 is a schematic cross-sectional view of the device box of the present invention;

FIG3 is a schematic diagram of the structure of the internal device of the fixed cylinder of the present invention;

FIG4 is a schematic diagram of a partial enlarged structure of point A in FIG3 of the present invention;

5 is a schematic diagram of the connection structure of the placement plate, the sliding block and the first baffle of the present invention;

FIG6 is a schematic diagram of a partially enlarged structure of point B in FIG5 of the present invention;

7 is a schematic diagram of the connection structure between the fastening block and the sliding block of the present invention;

FIG. 8 is a schematic diagram of the structure of the placement plate of the present invention.

List of reference numerals:

1. Bottom plate; 101. Device box; 1011. Magnet; 2. Drive motor; 201. Drive shaft; 2011. Active bevel gear; 3. Fixed cylinder; 301. Vertical track groove; 4. Vertical screw; 401. Passive bevel gear; 5. Sliding plate; 501. Block; 6. Upper connecting plate; 601. Connecting rod; 7. Placement plate; 701. Horizontal track groove; 702. Hook; 8. Fastening block; 801. Fastening screw; 9. Sliding block; 901. Fixed block; 10. First baffle plate; 1001. Fixed ear plate; 11. Second baffle plate; 1101. Sliding vertical rod.

Detailed ways

In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

Embodiment: Please refer to Figures 1 to 8:

The present invention provides a special tool for replacing a current transformer in a switch cabinet, comprising a bottom plate 1;

The main body of the bottom plate 1 is a long strip structure, and a device box 101 is installed in the middle of the upper end surface of the bottom plate 1;

The drive motor 2 is fixedly mounted on the front end surface of the device box 101, the front end of the drive motor 2 is drivingly connected to the drive shaft 201, and the rear end surface of the drive shaft 201 is rotatably connected to the rear end side plate of the device box 101;

The fixed cylinder 3 has a hollow structure inside and is fixedly mounted on the upper end surface of the device box 101;

A vertical screw rod 4, the upper end surface of the vertical screw rod 4 is rotatably connected to the top plate of the fixed cylinder 3, the lower end of the vertical screw rod 4 passes through the top plate of the device box 101 and is fixedly connected to the passive bevel gear 401, and the passive bevel gear 401 is located inside the device box 101;

The sliding plate 5 has a main body in the shape of a circular plate and a threaded hole is provided on the surface of the sliding plate 5;

The upper connecting plate 6 is a circular plate-shaped structure. Four connecting rods 601 are installed at the lower end of the upper connecting plate 6. The lower ends of the connecting rods 601 pass through the top plate of the fixed cylinder 3 and are fixedly connected to the sliding plate 5.

The placing plate 7 has two transverse track grooves 701 on its upper end surface. The transverse track grooves 701 are T-shaped structures. A fastening block 8 is provided inside each of the two transverse track grooves 701. The lower end of the placing plate 7 is fixedly connected to the upper connecting plate 6.

Sliding block 9, two sliding blocks 9 are symmetrically provided, two fixed blocks 901 are respectively installed at the left and right ends of the sliding block 9, and a first baffle 10 is installed at the outer end position of the upper end surface of the sliding block 9;

The second baffle 11 is symmetrically provided with two groups, and the inner end surface of the second baffle 11 is an inclined structure.

Among them, two magnets 1011 are installed on the upper end surface of the device box 101, and the magnets 1011 are long strip structures. Two groups of hooks 702 are symmetrically installed on the lower end surface of the placement plate 7, and the number of hooks 702 in each group is four.

By adopting the above scheme, the technical effect brought about is: when workers replace the current transformer, they need to use a variety of disassembly tools. By setting two sets of hooks 702 on the lower end surface of the placement plate 7, workers can hang commonly used tools on the hooks 702, which is convenient for workers to replace tools. At the same time, two magnets 1011 are installed on the upper end surface of the device box 101. The two magnets 1011 are long strip structures. After the workers remove the screws or nuts, they can place the screws on the surface of the magnets 1011. Through the attraction between the magnets 1011 and the screws, the screws can be fixed on the surface of the magnets 1011, thereby preventing the screws from scattering inside the switch cabinet and increasing the difficulty of workers to collect them.

Among them, an active bevel gear 2011 is installed on the surface of the driving shaft 201, and the active bevel gear 2011 is meshed with the passive bevel gear 401 at the lower end of the vertical screw 4. Blocks 501 are respectively installed at both ends of the sliding plate 5. Two vertical track grooves 301 are provided on the inner end surface of the fixed cylinder 3. The sliding plate 5 is slidably clamped in the vertical track groove 301 on the inner end surface of the fixed cylinder 3 through the blocks 501 at both ends. The sliding plate 5 is threadedly connected to the vertical screw 4.

By adopting the above scheme, the technical effect brought about is: since the weight of a single current transformer is large, it is inconvenient for workers to disassemble it. When the device is in use, the placement plate 7 can be placed at the lower end of the current transformer, and then the drive motor 2 is started, and the drive motor 2 drives the drive shaft 201 to rotate, and the active bevel gear 2011 on the surface of the drive shaft 201 is meshed with the passive bevel gear 401 at the lower end of the vertical screw 4, so that the drive shaft 201 can drive the rotation of the vertical screw 4 when rotating, and the vertical screw 4 is threadedly connected with the sliding plate 5, and the sliding plate 5 is slidably mounted on the fixed plate through the blocks 501 at both ends. In the vertical track groove 301 on the surface of the cylinder 3, the vertical screw 4 can drive the sliding plate 5 to move upward during rotation. The sliding plate 5 and the upper connecting plate 6 are connected by four connecting rods 601, so that when the sliding plate 5 moves upward, it can drive the upper connecting plate 6 to move upward. The upper connecting plate 6 is fixedly connected to the placement plate 7, so that the placement plate 7 will move upward with the upper connecting plate 6. When the upper end surface of the placement plate 7 contacts the current transformer, the placement plate 7 can support the current transformer to prevent the current transformer from falling when the workers are disassembling it, thereby bringing convenience to the workers' disassembly work.

Among them, the main body of the fastening block 8 is a T-shaped structure, and two fastening screws 801 are installed on the upper end surface of the fastening block 8. Through holes are opened on the surfaces of the fixed blocks 901 at the left and right ends of the sliding block 9. The fastening screws 801 pass through the through holes on the surface of the fixed blocks 901 and are fastened by nuts.

By adopting the above scheme, the technical effect brought about is: the fastening screw 801 is clamped in the through hole on the surface of the fixing block 901. When the worker loosens the nut of the fastening screw 801, the position of the sliding block 9 can be moved. When the worker tightens the nut on the surface of the fastening screw 801, the sliding block 9 can be fixed on the upper end surface of the placement plate 7, thereby fixing the sliding block 9.

Among them, three fixed ear plates 1001 are installed on the outer end surface of the first baffle 10, and the surface of the fixed ear plate 1001 is provided with through holes in the up and down directions. The outer end surface of the fixed ear plate 1001 is also provided with threaded holes, and three sliding vertical rods 1101 are installed on the lower end surface of the second baffle 11. The sliding vertical rods 1101 are slidably mounted in the through holes on the surface of the fixed ear plate 1001 and fastened by bolts.

By adopting the above scheme, the technical effect brought about is: a first baffle 10 is installed on the upper end surface of the sliding block 9, and the first baffle 10 can limit the current transformer to prevent the current transformer from shaking left and right after being removed. Different types of current transformers have different sizes. When replacing different types of current transformers, workers can adjust the distance between two adjacent sliding blocks 9 according to the width of the current transformer, and the three sliding vertical rods 1101 at the lower end of the second baffle 11 are clamped in the through holes on the surface of the fixed ear plate 1001 and fastened by bolts. Workers can adjust the total height of the first baffle 10 and the second baffle 11, which is convenient for fixing current transformers of different types, thereby increasing the versatility of the device.

Specific usage and function of this embodiment: In the present invention, since the weight of a single current transformer is large, it is inconvenient for workers to disassemble it. When the device is in use, the placement plate 7 can be placed at the lower end of the current transformer, and then the drive motor 2 is started. The drive motor 2 drives the drive shaft 201 to rotate, and the active bevel gear 2011 on the surface of the drive shaft 201 is meshed with the passive bevel gear 401 at the lower end of the vertical screw 4, so that the drive shaft 201 can drive the rotation of the vertical screw 4 when it rotates, and the vertical screw 4 is threadedly connected to the sliding plate 5. The sliding plate 5 is slidably mounted in the vertical track groove 301 on the surface of the fixed cylinder 3 through the blocks 501 at both ends, so that the vertical screw 4 can drive the sliding during rotation. The plate 5 moves upward, and the sliding plate 5 and the upper connecting plate 6 are connected by four connecting rods 601, so that when the sliding plate 5 moves upward, the upper connecting plate 6 can be driven to move upward, and the upper connecting plate 6 is fixedly connected to the placement plate 7, so that the placement plate 7 will move upward with the upper connecting plate 6. When the upper end surface of the placement plate 7 contacts with the current transformer, the placement plate 7 can support the current transformer to prevent the current transformer from falling when the workers disassemble it, thereby facilitating the workers' disassembly work. The fastening screw 801 is clamped in the through hole on the surface of the fixing block 901. When the worker loosens the nut of the fastening screw 801, the position of the sliding block 9 can be moved. When the worker tightens the fastening screw 801, the position of the sliding block 9 can be moved. After the nuts on the surface are tightened, the sliding block 9 can be fixed to the upper end surface of the placement plate 7 to fix the sliding block 9. The upper end surface of the sliding block 9 is installed with a first baffle 10. The first baffle 10 can limit the current transformer to prevent the current transformer from shaking left and right after being removed. Different types of current transformers have different sizes. When replacing different types of current transformers, workers can adjust the distance between two adjacent sliding blocks 9 according to the width of the current transformer, and the three sliding vertical rods 1101 at the lower end of the second baffle 11 are clamped in the through holes on the surface of the fixed ear plate 1001 and fastened by bolts. The worker can adjust the total distance between the first baffle 10 and the second baffle 11 The height is convenient for fixing current transformers of different types, thereby increasing the versatility of the device. Workers need to use a variety of disassembly tools when replacing current transformers. By setting two sets of hooks 702 on the lower end surface of the placement plate 7, workers can hang commonly used tools on the hooks 702, which is convenient for workers to replace tools. At the same time, two magnets 1011 are installed on the upper end surface of the device box 101. The two magnets 1011 are long strip structures. After the workers remove the screws or nuts, they can place the screws on the surface of the magnets 1011. Through the attraction between the magnets 1011 and the screws, the screws can be fixed on the surface of the magnets 1011, thereby preventing the screws from scattering inside the switch cabinet and increasing the difficulty of workers to collect them.

The above description is merely an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims (6)

1. A special tool for replacing a current transformer in a switch cabinet, characterized in that it comprises a base plate (1), the base plate (1) having a main body in a long strip-shaped structure, a device box (101) being installed at a middle position of an upper end surface of the base plate (1); a drive motor (2), the drive motor (2) being fixedly installed on a front end surface of the device box (101), the front end of the drive motor (2) being transmission-connected to a drive shaft (201), the rear end surface of the drive shaft (201) being rotationally connected to a rear end side plate of the device box (101), an active bevel gear (2011) being installed on the surface of the drive shaft (201), the active bevel gear (2011) being connected to a passive bevel gear at the lower end of a vertical screw (4). The fixed cylinder (3) is a hollow structure inside the fixed cylinder (3), and the fixed cylinder (3) is fixedly mounted on the upper end surface of the device box (101); a vertical screw rod (4), the upper end surface of the vertical screw rod (4) is rotatably connected to the top plate of the fixed cylinder (3), the lower end of the vertical screw rod (4) passes through the top plate of the device box (101) and is fixedly connected to the passive bevel gear (401), and the passive bevel gear (401) is located inside the device box (101); a sliding plate (5), the main body of the sliding plate (5) is a circular plate-shaped structure, and a threaded hole is opened on the surface of the sliding plate (5), and the threaded hole of the sliding plate (5) is screwed to the vertical screw rod (4). The upper connecting plate (6) is a circular plate-shaped structure. Four connecting rods (601) are installed at the lower end of the upper connecting plate (6). The lower ends of the connecting rods (601) pass through the top plate of the fixed cylinder (3) and are fixedly connected to the sliding plate (5). The placing plate (7) is provided with two transverse track grooves (701) on the upper end surface of the placing plate (7). The transverse track grooves (701) are T-shaped structures. A fastening block (8) is respectively arranged inside the two transverse track grooves (701). The fastening block (8) is a T-shaped structure. Two fastening screws (801) are installed on the upper end surface of the fastening block (8). The left and right ends of the sliding block (9) are A through hole is provided on the surface of the fixed block (901); a fastening screw (801) passes through the through hole on the surface of the fixed block (901) and is fastened by a nut; the lower end of the placement plate (7) is fixedly connected to the upper connecting plate (6); a sliding block (9); two sliding blocks (9) are symmetrically provided; two fixed blocks (901) are respectively installed at the left and right ends of the sliding block (9); a first baffle (10) is installed at the outer end position of the upper end surface of the sliding block (9); and a second baffle (11); two groups of the second baffle (11) are symmetrically provided; each group of the second baffle (11) is installed at the upper end of the first baffle (10); and the inner end surface of the second baffle (11) is an inclined structure. 2. The special tool for replacing a current transformer in a switch cabinet as claimed in claim 1, characterized in that two magnets (1011) are installed on the upper end surface of the device box (101), and the magnets (1011) are long strip structures. 3. The special tool for replacing a current transformer in a switch cabinet as claimed in claim 1, characterized in that: a clamping block (501) is installed at both ends of the sliding plate (5), and the inner end surface of the fixed cylinder (3) is provided with two vertical track grooves (301), and the sliding plate (5) is slidably clamped in the vertical track grooves (301) on the inner end surface of the fixed cylinder (3) through the clamping blocks (501) at both ends. 4. The special tool for replacing a current transformer in a switch cabinet as claimed in claim 1, characterized in that: three fixing ear plates (1001) are installed on the outer end surface of the first baffle (10), and the surface of the fixing ear plate (1001) is provided with through holes in the upper and lower directions, and the outer end surface of the fixing ear plate (1001) is also provided with a threaded hole. 5. The special tool for replacing current transformers in a switch cabinet as claimed in claim 4, characterized in that three sliding vertical rods (1101) are installed on the lower end surface of the second baffle (11), and the sliding vertical rods (1101) are slidably mounted in the through holes on the surface of the fixed ear plate (1001) and fastened by bolts. 6. The special tool for replacing current transformers in a switch cabinet as claimed in claim 1, characterized in that two groups of hooks (702) are symmetrically installed on the lower end surface of the placement plate (7), and the number of hooks in each group (702) is four.