Main transformer equipment and replacement method

Abstract

The invention relates to the technical field of transformers, and discloses a main transformer device which comprises a base, three first sealing busbars are arranged at the top of the base, lower conductors are arranged in the first sealing busbars, the tops of the lower conductors are connected with leads, the tops of the leads are connected with upper conductors, second sealing busbars are arranged on the outer sides of the upper conductors, and the first sealing busbars and the second sealing busbars are arranged on the outer sides of the upper conductors. An upper eccentric flange is arranged at the bottom of the second sealing nut, a lower eccentric flange is arranged at the top of the first sealing nut, a telescopic pipe is arranged between the upper eccentric flange and the lower eccentric flange, and a rain shielding assembly is arranged on the base. By adopting the mode of the upper eccentric flange and the lower eccentric flange, the two sealing nuts can be conveniently disassembled, and the joint is protected by adopting the telescopic pipe, so that the work amount and the cost of a traditional method are greatly reduced, the tedious technological process is simplified, the expected effect is achieved, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a main transformer device and a replacement method. Background Art

[0002] The capacity of the main transformer is generally large, and it is required to work with high reliability. Although the failure rate of the main transformer is not high, once a failure occurs, it will cause significant losses. At the least, it may cause equipment failure; at the worst, it may cause a fire and endanger normal transportation safety. Therefore, it is very important to analyze the cause of the transformer failure and take corresponding preventive measures.

[0003] With the increase of service life, maintenance and renovation, and changes in foundation of large outdoor oil-immersed transformer equipment, the soft connection of the three-phase enclosed busbar of the transformer is twisted and deformed, and the upper and lower ends of the soft connection of the lead are misaligned, which reduces the service life of the rubber expansion sleeve and poses a safety hazard of internal lead discharge to the ground.

[0004] There are two traditional ways to solve the above problems:

[0005] 1. Change the foundation of the equipment. Problems: large amount of work, high cost, and long construction period. Large outdoor transformers fully filled with oil weigh hundreds of tons, and long-term operation does not meet the conditions for the renovation period.

[0006] 2. Change the closed busbar structure at the upper end of the soft connection to correct the butt joint. Existing problems: The project volume is large and the process requirements are high. Changing the closed busbar structure is prone to secondary hidden dangers and affects the service life of the equipment. If the misalignment problem occurs again, it will increase the difficulty of transformation.

[0007] Therefore, an improved main transformer device and replacement method are provided. Summary of the invention

[0008] 1. Technical issues to be solved

[0009] In view of the deficiencies in the prior art, the present invention provides a main transformer device and a replacement method, which has the advantage of simple operation and solves the problems of large engineering workload and cost.

[0010] (II) Technical solution

[0011] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a main transformer device, comprising a base, three sealing nut 1s are arranged on the top of the base, a lower conductor is arranged inside the sealing nut 1, a lead is connected to the top of the lower conductor, the top of the lead is connected to the upper conductor, a sealing nut 2 is arranged on the outside of the upper conductor, an upper eccentric flange is arranged at the bottom of the sealing nut 2, a lower eccentric flange is arranged on the top of the sealing nut 1, a telescopic tube is arranged between the upper eccentric flange and the lower eccentric flange, and a rain shield assembly is arranged on the base.

[0012] In some embodiments, the rain shield assembly includes a rain shield plate, and the outer side wall of the second sealing mother is provided with a rain shield plate.

[0013] In some embodiments, the outer side wall of the seal mother 1 is provided with a plate body.

[0014] In some embodiments, a rod body 2 is disposed on the top of the base, a rod body 1 is slidably connected to the inner side wall of the rod body 2, and the top of the rod body 1 is connected to the rain shield.

[0015] In some embodiments, the outer side wall of the rod body 1 is connected with a protrusion via a spring, and the outer side wall of the rod body 2 is provided with a slot that cooperates with the rain shield assembly.

[0016] A method for replacing a main transformer device comprises the following steps:

[0017] Measure the diameter of the transformer nut that is dislocated and deformed, and prepare suitable replacement eccentric flanges and rubber expansion sleeves according to the degree of dislocation;

[0018] Remove the original upper eccentric flange and the sealing nut of the upper conductor, remove the lower eccentric flange and the sealing nut of the lower conductor, remove the lead soft connection of the upper conductor and the lower conductor, and remove the original rubber expansion sleeve;

[0019] Cut the replaced upper eccentric flange longitudinally to form a cut on the upper eccentric flange, then cut the sealing nut located at the upper conductor, form a cut on the sealing nut, and drill a drainage hole on the bottom side of the sealing nut of the lower conductor;

[0020] The cutting step is because the upper eccentric flange is connected to the sealing mother of the upper conductor. In order not to change the common box busbar structure and prevent the hidden danger of ground discharge caused by the reduction of the discharge distance of the charged conductor in the common box busbar, the parts that need to be cut are cut before installation to reduce on-site cutting and welding operations and shorten the on-site operation time;

[0021] First, put the rubber expansion sleeve on the lead connection of the upper conductor and the lower conductor, weld the cut of the upper eccentric flange with the cut of the sealing nut at the upper conductor, connect the sewage pipe with the cut-off valve with the sewage hole, and then put the rain shield assembly on the sealing nut at the upper conductor to complete the replacement of the main transformer components.

[0022] The main transformer after the main transformer parts are replaced must be subjected to electrical testing or electrical testing must be carried out in real time during the replacement process, and high-voltage testing must be carried out according to the routine minor repair test items of the transformer to ensure the electrical installation.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the present invention provides a main transformer device and a replacement method, which has the following features:

[0025] Beneficial effects:

[0026] The main transformer equipment and replacement method adopts upper and lower eccentric flanges to facilitate the disassembly of two sealing nuts, and adopts telescopic tubes to protect the connection, thereby greatly reducing the engineering workload and cost of traditional methods, simplifying the cumbersome process flow, achieving the expected effect, and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The structure of the present invention is shown in FIG. Figure 1 ;

[0028] Figure 2 The structure of the present invention is shown in FIG. Figure 2 ;

[0029] Figure 3 The structure of the present invention is shown in FIG. Figure 3 .

[0030] In the figure:

[0031] 100, base; 110, sealing nut 1; 120, lower conductor; 130, lower eccentric flange;

[0032] 200, telescopic tube;

[0033] 300, sealing mother second; 310, upper conductor; 320, upper eccentric flange;

[0034] 400, rain shield assembly; 410, rain shield plate; 420, rod body 1; 430, rod body 2; 440, convex block; 450, plate body;

[0035] 500. Lead. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0038] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0040] In the related art, with the increase of the service life of large outdoor oil-immersed transformer equipment, maintenance and renovation, and changes in the foundation, the soft connection of the three-phase closed busbar of the transformer is twisted and deformed, and the upper and lower ends of the lead soft connection are misaligned, which reduces the service life of the rubber expansion sleeve and poses a safety hazard of internal lead discharge to the ground.

[0041] There are two traditional ways to solve the above problems:

[0042] 1. Change the foundation of the equipment. Problems: large amount of work, high cost, and long construction period. Large outdoor transformers fully filled with oil weigh hundreds of tons, and long-term operation does not meet the conditions for the renovation period.

[0043] 2. Change the closed busbar structure at the upper end of the soft connection to correct the butt joint. Existing problems: The project volume is large and the process requirements are high. Changing the closed busbar structure is prone to secondary hidden dangers and affects the service life of the equipment. If the misalignment problem occurs again, it will increase the difficulty of transformation.

[0044] In order to solve the problems in the related technology to a certain extent, the embodiment of the present application provides a main transformer equipment and replacement method, which adopts the upper and lower eccentric flanges to facilitate the disassembly of the two sealing nuts, and adopts the telescopic tube to protect the connection, thereby greatly reducing the engineering workload and cost of the traditional method, simplifying the cumbersome process flow, achieving the expected effect, and extending the service life of the equipment.

[0045] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0046] Combination Figure 1-Figure 3 The embodiment of the present application provides a main transformer device, characterized in that it includes a base 100, three sealing mothers 110 are arranged on the top of the base 100, a lower conductor 120 is arranged inside the sealing mother 110, a lead 500 is connected to the top of the lower conductor 120, the top of the lead 500 is connected to the upper conductor 310, a sealing mother 2 300 is arranged on the outer side of the upper conductor 310, an upper eccentric flange 320 is arranged at the bottom of the sealing mother 2 300, a lower eccentric flange 130 is arranged on the top of the sealing mother 110, a telescopic tube 200 is arranged between the upper eccentric flange 320 and the lower eccentric flange 130, and a rain shielding assembly 400 is arranged on the base 100.

[0047] In some embodiments, the rain shield assembly 400 includes a rain shield plate 410 , and the outer side wall of the second sealing mother 300 is provided with the rain shield plate 410 .

[0048] Specifically, the rain shield 410 is connected to the second sealing mother 300 by means of a sealing gasket, which reduces the introduction of rain from the gap. The rain shield 410 is sleeved on the second sealing mother 300.

[0049] In some embodiments, a plate 450 is disposed on the outer side wall of the first sealing mother 110 .

[0050] Specifically, the plate body 450 is connected to the sealing mother 110 in the manner of the above-mentioned rain shield 410. The arrangement of the rain shield 410 and the plate body 450 facilitates the installation and positioning of the telescopic tube 200.

[0051] In some embodiments, a rod body 2 430 is provided on the top of the base 100, and the inner wall of the rod body 2 430 is slidably connected to the rod body 1 420, and the top of the rod body 1 420 is connected to the rain shield 410; the outer wall of the rod body 1 420 is connected to the protrusion 440 through a spring, and the outer wall of the rod body 2 430 is provided with a slot that cooperates with the rain shield assembly 400.

[0052] Specifically, when installing the rain shield 410 and the plate body 450, the adjusting rod body 1 420 can be used to quickly adjust the height of the rain shield 410. During the adjustment, the telescopic tube 200 is also driven to be extended and retracted, and then quickly put on the connection between the two sealing mothers. Finally, the protrusion 440 and the groove cooperate to fix the rod body 1 420. The spring is not shown in the accompanying drawings. A plurality of grooves are provided on the outer wall of the rod body 2 430, which are not shown in the accompanying drawings.

[0053] A method for replacing a main transformer device comprises the following steps:

[0054] Measure the diameter of the transformer nut that is dislocated and deformed, and prepare suitable replacement eccentric flanges and rubber expansion sleeves according to the degree of dislocation;

[0055] Remove the original upper eccentric flange and the sealing nut of the upper conductor, remove the lower eccentric flange and the sealing nut of the lower conductor, remove the lead soft connection of the upper conductor and the lower conductor, and remove the original rubber expansion sleeve;

[0056] Cut the replaced upper eccentric flange longitudinally to form a cut on the upper eccentric flange, then cut the sealing nut located at the upper conductor, form a cut on the sealing nut, and drill a drainage hole on the bottom side of the sealing nut of the lower conductor;

[0057] The cutting step is because the upper eccentric flange is connected to the sealing mother of the upper conductor. In order not to change the common box busbar structure and prevent the hidden danger of ground discharge caused by the reduction of the discharge distance of the charged conductor in the common box busbar, the parts that need to be cut are cut before installation to reduce on-site cutting and welding operations and shorten the on-site operation time;

[0058] First, put the rubber expansion sleeve on the lead connection of the upper conductor and the lower conductor, weld the cut of the upper eccentric flange with the cut of the sealing nut at the upper conductor, connect the sewage pipe with the cut-off valve with the sewage hole, and then put the rain shield assembly on the sealing nut at the upper conductor to complete the replacement of the main transformer components.

[0059] The main transformer after the main transformer parts are replaced must be subjected to electrical testing or electrical testing must be carried out in real time during the replacement process, and high-voltage testing must be carried out according to the routine minor repair test items of the transformer to ensure the electrical installation.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", "some examples", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0061] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A main transformer device, characterized in that: The invention comprises a base (100), wherein three sealing mothers (110) are arranged on the top of the base (100), a lower conductor (120) is arranged inside the sealing mother (110), a lead wire (500) is connected to the top of the lower conductor (120), the top of the lead wire (500) is connected to the upper conductor (310), a sealing mother (300) is arranged on the outer side of the upper conductor (310), an upper eccentric flange (320) is arranged at the bottom of the sealing mother (300), a lower eccentric flange (130) is arranged on the top of the sealing mother (110), a telescopic tube (200) is arranged between the upper eccentric flange (320) and the lower eccentric flange (130), and a rain shielding assembly (400) is arranged on the base (100).

2. A main transformer device according to claim 1, characterized in that: The rain shielding assembly (400) comprises a rain shielding plate (410), and the outer side wall of the second sealing mother (300) is provided with a rain shielding plate (410).

3. A main transformer device according to claim 2, characterized in that: The outer side wall of the sealing mother (110) is provided with a plate body (450).

4. A main transformer device according to claim 3, characterized in that: A second rod body (430) is disposed on the top of the base (100), and a first rod body (420) is slidably connected to the inner side wall of the second rod body (430), and the top of the first rod body (420) is connected to the rain shield (410).

5. A main transformer device according to claim 4, characterized in that: The outer wall of the rod body 1 (420) is connected to a protrusion (440) via a spring, and the outer wall of the rod body 2 (430) is provided with a slot for matching the rain shielding assembly (400).

6. A method for replacing a main transformer device, according to a main transformer device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Measure the diameter of the transformer nut that is dislocated and deformed, and prepare suitable replacement eccentric flanges and rubber expansion sleeves according to the degree of dislocation; Remove the original upper eccentric flange and the sealing nut of the upper conductor, remove the lower eccentric flange and the sealing nut of the lower conductor, remove the lead soft connection of the upper conductor and the lower conductor, and remove the original rubber expansion sleeve; Cut the replaced upper eccentric flange longitudinally to form a cut on the upper eccentric flange, then cut the sealing nut located at the upper conductor, form a cut on the sealing nut, and drill a drainage hole on the bottom side of the sealing nut of the lower conductor; The cutting step is because the upper eccentric flange is connected to the sealing mother of the upper conductor. In order not to change the common box busbar structure and prevent the hidden danger of ground discharge caused by the reduction of the discharge distance of the charged conductor in the common box busbar, the parts that need to be cut are cut before installation to reduce on-site cutting and welding operations and shorten the on-site operation time; First, put the rubber expansion sleeve on the lead connection of the upper conductor and the lower conductor, weld the cut of the upper eccentric flange with the cut of the sealing nut at the upper conductor, connect the sewage pipe with the cut-off valve with the sewage hole, and then put the rain shield assembly on the sealing nut at the upper conductor to complete the replacement of the main transformer components. The main transformer after the main transformer parts are replaced must be subjected to electrical testing or electrical testing must be carried out in real time during the replacement process, and high-voltage testing must be carried out according to the routine minor repair test items of the transformer to ensure the electrical installation.

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