Transformer maintenance insulation protection device

Abstract

The transformer maintenance insulation protection device of the present invention relates to an auxiliary device for repairing transformers, and its purpose is to overcome the problems that the sealing operation of the existing transformer insulation protection device is complicated and cannot provide assistance during the maintenance process of the transformer. The device comprises a workbench, a lifting device, an enclosure and an insulating cover plate; the workbench comprises a work surface, and a load-bearing platform through hole is provided on the work surface; the lifting device is located below the load-bearing platform through hole; the lifting device can drive the transformer to pass through the load-bearing platform through hole and reach the maintenance position; the enclosure is adapted to the load-bearing platform through hole and embedded in the load-bearing platform through hole; and the outer wall of the enclosure is slidably matched with the inner wall of the load-bearing platform through hole; the insulating cover plate can cover the upper opening of the enclosure.

Description

Technical Field

[0001] The invention relates to an auxiliary device for repairing a transformer. Background Art

[0002] When the transformer is in normal operation, it is filled with qualified transformer oil to ensure that the core and coil inside the transformer body do not come into contact with the air, preventing the insulation of the transformer body from getting damp. After the oil-immersed transformer is put into operation, the maintenance cycle is as follows: the first overhaul cycle is within 5 years, and then one side is overhauled every 10 years; the minor repair cycle is generally once a year. The oil-immersed transformer needs to drain all the transformer oil during maintenance. In order to ensure good insulation of the transformer body, the exposure time of the main transformer body insulation in the air is stipulated. When the air humidity is 65%-75%, it shall not exceed 12 hours, and when the air humidity is below 65%, it shall not exceed 16 hours. When the air humidity is greater than 75%, the transformer shall not be overhauled.

[0003] During the maintenance of the transformer, some special circumstances often occur at the work site, such as weather, human factors, equipment reasons, which cause the maintenance work to be done overnight or interrupted, so that the body of the transformer is exposed to the air for too long. In order to shorten the exposure time of the body of the transformer to the air, the measures often taken are: seal the body of the transformer during the work interruption, and evacuate and maintain the transformer to avoid direct contact with the air. However, this method has disadvantages. If the transformer is not sealed well, a large amount of moisture from the outside will continuously enter the body of the transformer, which will not only fail to maintain the insulation of the body, but will be harmful to the insulation of the main transformer.

[0004] The insulation protection device of the transformer in the prior art has the following defects:

[0005] 1. The sealing operation is complicated. If the operation is not done properly and the sealing is not done well, moisture from the outside will continuously enter the body of the device, which will not only fail to maintain the insulation of the body, but will be harmful to the insulation of the main transformer;

[0006] 2. It only serves as a protective device and cannot provide any help during the maintenance of the transformer. Summary of the invention

[0007] The purpose of the present invention is to overcome the problems that the sealing operation of the existing transformer insulation protection device is complicated and cannot provide assistance during the maintenance process of the transformer, and to provide a transformer maintenance insulation protection device.

[0008] The transformer maintenance insulation protection device of the present invention comprises a workbench, a lifting device, a fence and an insulation cover;

[0009] The workbench includes a work surface, and a load-bearing platform through hole is provided on the work surface;

[0010] The lifting device is located below the through hole of the load-bearing platform;

[0011] The lifting device can drive the transformer through the through hole of the load-bearing platform and reach the maintenance position;

[0012] The enclosure is adapted to and embedded in the through hole of the load-bearing platform; and the outer wall of the enclosure is slidably matched with the inner wall of the through hole of the load-bearing platform;

[0013] The insulating cover plate can be connected to cover the upper opening of the enclosure.

[0014] The beneficial effects of the present invention are:

[0015] 1. The present invention is easy to operate. The insulating plate can be lifted up and down, and combined with the insulating cover plate, a sealed space can be quickly provided for the transformer. The sealing work can be easily completed by two people working together.

[0016] 2. The present invention is convenient for assisting workers to repair the transformer. The transformer can be raised and lowered by the lifting device, which makes it convenient for workers to repair various parts of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the transformer maintenance insulation protection device of the present invention;

[0018] Figure 2 It is a schematic diagram of the matching structure of a workbench, a latch and a storage box in the transformer maintenance insulation protection device of the present invention;

[0019] Figure 3 It is a schematic diagram of the disassembly structure of four insulating plates and an insulating cover plate in the transformer maintenance insulation protection device of the present invention;

[0020] Figure 4 It is a structural schematic diagram of the lifting device in the transformer maintenance insulation protection device of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the oil storage barrel in the transformer maintenance insulation protection device of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention. Specific implementation method 1

[0026] The transformer maintenance insulation protection device of this embodiment includes a workbench 1, a lifting device 2, a fence and an insulation cover 4;

[0027] The workbench 1 comprises a work surface 1-1, and a load-bearing platform through hole 1-2 is provided on the work surface 1-1;

[0028] The lifting device 2 is located below the through hole 1-2 of the load-bearing platform;

[0029] The lifting device 2 can drive the transformer to pass through the through hole 1-2 of the load-bearing platform and reach the maintenance position;

[0030] The enclosure is adapted to and embedded in the through hole 1-2 of the load-bearing platform; and the outer wall of the enclosure is slidably matched with the inner wall of the through hole 1-2 of the load-bearing platform;

[0031] The insulating cover plate 4 can cover the upper opening of the enclosure. Specific implementation method 2

[0033] This embodiment is a further description of the first embodiment. In this embodiment, the workbench 1 further includes at least two sliding wheels 1-3;

[0034] At least two sliding wheels 1-3 are arranged on the inner side wall of the load-bearing platform through hole 1-2 and can rotate;

[0035] The outer side wall of the enclosure is provided with a slide groove 5 matching the sliding wheels 1 - 3 , so that the enclosure can move along the length direction of the slide groove 5 . Specific implementation method three

[0037] This embodiment is a further explanation of the second embodiment. In this embodiment, an insulating board handle 6 is fixed to the top of the enclosure. Specific implementation method four

[0039] This embodiment is a further description of the first, second or third embodiment. In this embodiment, two opposite side walls of the enclosure are each provided with at least one pin hole 7;

[0040] The side wall of the work surface 1 - 1 is provided with a latch pin 8 corresponding to the position of the pin hole 7 . Specific implementation method five

[0042] This embodiment is a further description of the fourth embodiment. In this embodiment, a drying hole 9 is provided on a side wall of the enclosure. Specific implementation method 6

[0044] This embodiment is a further description of the first embodiment. In this embodiment, an oil storage barrel 10 is further included; an oil barrel channel 1-6 is also provided on the work surface 1-1;

[0045] The oil storage barrel 10 is embedded in the oil barrel channel 1-6. Specific implementation method seven

[0047] This embodiment is a further explanation of the sixth embodiment. In this embodiment, a protrusion 10-1 is fixed to the outer side wall of the top of the oil storage barrel 10;

[0048] A lap block 1-5 is fixed to the inner side wall of the oil barrel channel 1-6, and the lap block 1-5 matches the protrusion 10-1, so that the oil storage barrel 10 can be lapped on the lap block 1-5 through the protrusion 10-1. Specific implementation method eight

[0050] This embodiment is a further description of the first embodiment. In this embodiment, at least one storage box 11 is further included;

[0051] The storage box 11 is fixed to the upper surface of the work surface 1-1. Specific implementation method nine

[0053] This embodiment is a further description of the first embodiment. In this embodiment, the lifting device 2 includes a base 2-1, a load-bearing platform 2-2 and a telescopic rod 2-3;

[0054] One end of the telescopic rod 2-3 is connected to the base 2-1, and the other end is connected to the load-bearing platform 2-2;

[0055] The upper surface of the load-bearing platform 2-2 is used to place the transformer, and when the upper surface of the load-bearing platform 2-2 is flush with the work surface 1-1, the load-bearing platform 2-2, the enclosure and the insulating cover 4 form a sealed box. Specific implementation method 10

[0057] This embodiment is a further description of the first embodiment. In this embodiment, an insulating cover groove 1-4 is provided on the upper surface of the work surface 1-1, and the insulating cover groove 1-4 matches the insulating cover plate 4;

[0058] When the insulating cover plate 4 is placed in the insulating cover groove 1 - 4 , the upper surface of the insulating cover plate 4 is flush with the upper surface of the work surface 1 - 1 . Specific embodiments

[0060] like Figure 1 to Figure 5As shown, the present invention includes a workbench 1, a load-bearing platform through hole 1-2 is provided in the middle of the workbench 1, sliding wheels 1-3 are provided on the four inner walls of the load-bearing platform through hole 1-2, and limit rods are provided on both sides of the four sliding wheels 1-3, and the limit rods are used to limit the sliding range of the insulating plate 3, and enclosures are provided around the inner wall of the load-bearing platform through hole 1-2, and the enclosures are formed by a square-shaped baffle composed of four insulating plates 3. Among them, the four insulating plates 3 are two long insulating plates 3 and two short insulating plates 3, and the four insulating plates 3 are provided with a slide groove 5 on the side facing the workbench 1, and the slide groove 5 is detachably connected with the sliding wheel 1-3 (slidingly matched after assembly), and the top of the four insulating plates 3 is provided with an insulating plate handle 6, and the top of the two short insulating plates 3 is provided with a cover channel (the cover channel is used to insert the insulating cover plate 4), and the top of the two long insulating plates 3 is provided with a cover side groove (the cover side groove is used to guide and clamp the insulating cover plate 4).

[0061] Two pin holes 7 are respectively arranged at the bottom ends of the four insulating plates 3 , and two latch pins 8 are respectively arranged at both sides of the workbench 1 .

[0062] An insulating cover groove 1-4 is provided on one side of the upper surface of the workbench 1, an insulating cover plate 4 can be placed on the insulating cover groove 1-4, an elastic handle is provided in the middle of the top of the insulating cover plate 4, a lifting device 2 is provided at the bottom end of the load-bearing platform through hole 1-2, a telescopic rod 2-3 is provided in the middle of the top of the lifting device 2, and a load-bearing platform 2-2 is provided at the top of the telescopic rod 2-3.

[0063] Specifically, the workbench 1 provides an operating space for maintenance workers; through the combination of the load-bearing platform 2-2, the insulating plate 3 and the insulating cover plate 4, an insulated sealed space is provided for the transformer to prevent moisture when maintenance is stopped during work intervals or other working conditions; the lifting device 2 cooperates with the load-bearing platform 2-2 to lower the transformer, making it convenient for workers to repair the upper structure of the transformer and improving the maintenance efficiency of the workers. The maintenance position is the position required by the workers to repair the transformer, that is, any position within the lifting range of the lifting device 2 that is convenient for the workers to repair the transformer.

[0064] Among them: the load-bearing platform 2-2, the insulating plate 3, and the insulating cover plate 4 are PET sheets. PET sheets have high mechanical strength, rigidity, and hardness. They have good sliding performance and wear resistance, good electrical insulation, very good creep resistance, low and stable friction coefficient, excellent wear resistance, and very good dimensional stability.

[0065] The staff first builds the workbench 1, and then installs the four insulating plates 3 around the through hole 1-2 of the load-bearing platform through the sliding wheel 1-3 in turn (after installation, the four insulating plates 3 are all under the workbench 1-1), and then raises the load-bearing platform 2-2 to the workbench 1-1, uses a crane to lift the transformer to the load-bearing platform, and then starts the maintenance work. With the help of the lifting device 2, various parts of the transformer can be inspected. The maintenance needs to be suspended during the maintenance. When the transformer needs to be sealed, first raise the load-bearing platform 2-2 to the workbench 1-1 (because there may be ups and downs during the maintenance process), and then multiple staff members work together, one is responsible for lifting the insulating plate 3, and the other is responsible for plugging and unplugging the pin 8, and finally inserting the insulating cover plate 4 into the cover channel and the cover edge groove for capping (at this time, the four insulating plates 3 and the insulating cover plate 4 are all on the workbench 1-1).

[0066] Furthermore, an oil barrel channel 1-6 is provided on one side of the top of the workbench 1, and overlapping blocks 1-5 are provided around the inner wall of the oil barrel channel 1-6. The oil barrel channel 1-6 is detachably connected to an oil storage barrel 10, and a barrel cover is provided on the top of the oil storage barrel 10. Protrusions 10-1 are provided around one end of the oil storage barrel 10 close to the barrel cover, and the bottom end of the oil storage barrel 10 is detachably connected to a bottom barrel.

[0067] The oil needs to be drained when the oil-immersed transformer is overhauled. In the prior art, an oil storage barrel 10 needs to be prepared to temporarily store the drained oil. After the overhaul is completed, the oil needs to be replenished.

[0068] When draining the oil from the transformer, the staff only needs to open the barrel cover, use the oil pumping device to put the oil outlet pipe into the oil storage barrel 10, and drain the oil. After draining the oil, the barrel cover can be closed to carry out the next maintenance work. When the oil storage barrel 10 needs to be cleaned later, the oil storage barrel 10 can be taken out and the bottom barrel can be disassembled for cleaning. The oil storage barrel 10 allows the oil discharged from the transformer to be directly stored in the oil storage barrel 10 during the transformer maintenance, without the need to prepare an oil barrel separately. After use, it is also very convenient to disassemble and clean.

[0069] Furthermore, three storage boxes 11 are provided on one side of the top of the workbench 1, and the three storage boxes 11 are made of hard material.

[0070] Three storage boxes 11 are provided. When the staff is repairing the transformer, the small parts removed from the transformer can be placed in the storage boxes 11 to avoid missing small parts and affecting the subsequent restoration of the transformer.

[0071] During the maintenance process, the storage box 11 can also be used as a temporary rest area to provide seats for the staff, so that the staff can take a short rest.

[0072] Furthermore, the bottom end of the oil storage barrel 10 contacts the ground, and after the barrel cover is closed, the barrel cover surface is flush with the work surface 1-1.

[0073] The bottom end of the oil storage barrel 10 contacts the ground so that the workbench 1 does not bear the weight of the oil, thereby reducing the load-bearing burden of the workbench 1 . After the oil discharge operation is completed, the oil cover can be closed without occupying the space of the workbench 1 .

[0074] After the oil storage barrel 10 is installed, since the oil storage barrel 10 directly contacts the ground, the weight of the oil discharged from the transformer is borne by the ground, thereby reducing the bearing pressure of the workbench 1.

[0075] Furthermore, a drying hole 9 is provided on one side of the insulating plate 3 .

[0076] The drying hole 9 can provide an air inlet channel when the transformer is sealed, and can be connected to the blowpipe of the dryer to provide a dry environment for the transformer during the sealing period to further avoid moisture.

[0077] The working principle of the present invention is as follows: a workbench 1 is provided, and 4 detachable insulating plates 3 are arranged around the through holes 1-24 of the load-bearing platform. A lifting device 2 is arranged at the bottom of the through holes 1-2 of the load-bearing platform. The lifting device 2 cooperates with the load-bearing platform 2-2 to facilitate the staff to inspect the transformer. The 4 insulating plates 3 can be lifted up and down through the slide groove 5 and the sliding wheel 1-3, and cooperate with the insulating cover plate 4 to quickly provide a sealed space for the transformer. A drying hole 9 is arranged on one of the insulating plates 3, and an external dryer can be connected to ensure the dryness of the sealed space and prevent the transformer body from being damp. A storage box 11 and an oil storage barrel 10 are arranged on one side of the workbench 1 to facilitate the temporary placement of the parts removed during the inspection and the oil discharged from the transformer. The present invention has its own oil storage device and parts storage device. Any parts and oil on the transformer will not be taken out of the workbench 1, which is convenient for later recovery and improves work efficiency. In addition, the device of the present invention has strong durability, the workbench is less stressed, the heavy transformer body is borne by the lifting device 2, the weight of the oil is borne by the ground, and the entire workbench 1 basically only bears the weight of the staff.

[0078] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features of the various dependent claims and herein may be combined in a manner different from that described in the original claims. It should also be understood that the features described in conjunction with the individual embodiments may be used in other embodiments.

Claims

1. Transformer maintenance insulation protection device, characterized in that: It comprises a workbench (1), a lifting device (2), a fence and an insulating cover plate (4); The workbench (1) comprises a work surface (1-1), and a load-bearing platform through hole (1-2) is provided on the work surface (1-1); The lifting device (2) is located below the load-bearing platform through hole (1-2); The lifting device (2) can drive the transformer to pass through the bearing platform through hole (1-2) and reach the maintenance position; The enclosure is adapted to the load-bearing platform through hole (1-2) and is embedded in the load-bearing platform through hole (1-2); and the outer wall of the enclosure is slidably matched with the inner wall of the load-bearing platform through hole (1-2); The insulating cover plate (4) can cover the upper opening of the enclosure; The workbench (1) further comprises at least two sliding wheels (1-3); The at least two sliding wheels (1-3) are both arranged on the inner side wall of the load-bearing platform through hole (1-2) and are capable of rotating; The outer side wall of the enclosure is provided with a slide groove (5) matching the sliding wheel (1-3), so that the enclosure can move along the length direction of the slide groove (5); An insulating board handle (6) is fixed on the top of the enclosure; Two opposite side walls of the enclosure are each provided with at least one pin hole (7); The side wall of the work surface (1-1) is provided with a latch pin (8) corresponding to the position of the pin hole (7); A drying hole (9) is provided on a side wall of the enclosure; The lifting device (2) comprises a base (2-1), a load-bearing platform (2-2) and a telescopic rod (2-3); One end of the telescopic rod (2-3) is connected to the base (2-1), and the other end is connected to the load-bearing platform (2-2); The upper surface of the load-bearing platform (2-2) is used to place the transformer, and when the upper surface of the load-bearing platform (2-2) is flush with the work surface (1-1), the load-bearing platform (2-2), the enclosure and the insulating cover plate (4) form a sealed box.

2. The transformer maintenance insulation protection device according to claim 1 is characterized in that: It also includes an oil storage barrel (10); and an oil barrel channel (1-6) is also provided on the work surface (1-1); The oil storage barrel (10) is embedded in the oil barrel channel (1-6).

3. The transformer maintenance insulation protection device according to claim 2 is characterized in that: A convex block (10-1) is fixed to the outer side wall of the top of the oil storage barrel (10); A lap block (1-5) is fixed to the inner side wall of the oil barrel channel (1-6), and the lap block (1-5) matches the protrusion (10-1), so that the oil storage barrel (10) can be lapped on the lap block (1-5) through the protrusion (10-1).

4. The transformer maintenance insulation protection device according to claim 1, characterized in that: Also includes at least one storage box (11); The storage box (11) is fixed to the upper surface of the work surface (1-1).

5. The transformer maintenance insulation protection device according to claim 1, characterized in that: An insulating cover groove (1-4) is provided on the upper surface of the work surface (1-1), and the insulating cover groove (1-4) matches the insulating cover plate (4); When the insulating cover plate (4) is placed in the insulating cover groove (1-4), the upper surface of the insulating cover plate (4) is flush with the upper surface of the work surface (1-1).

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