A fully insulated 145kv power transformer

Abstract

The application discloses a kind of full insulation 145kV power transformer, it is related to power transformer technical field, including bottom plate, the upper end of the bottom plate is connected with the body of instrument by bolt fixed connection, the upper side of the bottom plate is fixedly installed with transformer main body, the outside of the transformer main body is provided with insulation mechanism, the insulation mechanism is fixedly installed in the upper side of bottom plate, the insulation mechanism includes locating rod and insulating plate, four the locating rod is fixedly installed in the side of bottom plate in central symmetry, the insulating plate is movably clamped between two locating rods, the insulating plate is made of boron nitride ceramic.The insulating plate made of boron nitride ceramic has excellent insulation performance, its relative dielectric constant and other electrical properties enable it to effectively block current in electric field, and the insulating plate acts as a barrier to prevent electric field lines from escaping from the weakly insulated part of the transformer main body, thereby avoiding the occurrence of partial discharge phenomenon.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power transformers, in particular to a full insulation 145kV power transformer. BACKGROUND

[0002] As a crucial electrical device in the power system, power transformers play a key role in changing the size of alternating voltage. Among them, 145kV belongs to a higher voltage level. In the process of power transmission, the voltage level of 145kV has significant advantages. It can effectively reduce the loss of energy in the transmission process, realize long-distance and large-capacity power transmission, and meet the demand for power in different regions. It can efficiently transport the power generated by power plants to remote power consumption areas, providing stable and reliable power supply for large-scale power consumption scenarios such as cities and industries. At the same time, in large-scale substations, 145kV power transformers, as key equipment, play an important role in voltage conversion and distribution, ensuring the safe and stable operation of the power system, and promoting the rational allocation and utilization of power resources.

[0003] A transformer core structure and a power transformer disclosed in Chinese Patent No. CN113690030B include a housing, a bottom plate cavity, a slotted support frame, a transformer component, etc. The bottom plate cavity is fixedly installed in the housing, the slotted support frame is fixedly installed on the bottom plate cavity, and the transformer component is arranged on the slotted support frame.

[0004] A higher voltage level means that the insulation material inside the transformer needs to have higher insulation performance to withstand the electric field strength brought by high voltage, but the existing power transformer insulation does not meet the insulation requirement of 145kV level power transformer. When the insulation performance is insufficient, under the action of the electric field, partial discharge is prone to occur at the weakly insulated part inside the transformer. In the 145kV high voltage environment, the energy generated by the partial discharge will gradually age and damage the insulation material, forming a carbonized channel, further reducing the insulation performance, and eventually possibly leading to insulation breakdown, causing transformer short circuit failure. SUMMARY

[0005] The purpose of the present application is to provide a full insulation 145kV power transformer to solve the problem of partial discharge at the weakly insulated part inside the transformer under the action of the electric field when the insulation performance is insufficient, which leads to transformer short circuit failure.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fully insulated kV power transformer, comprising a base plate, the upper end of the base plate is fixedly connected to the body by bolts, the transformer body is fixedly installed above the base plate, an insulating mechanism is provided on the outside of the transformer body, the insulating mechanism is fixedly installed above the base plate, the insulating mechanism comprises a positioning rod and an insulating plate, four of the positioning rods are fixedly installed on one side of the base plate in a centrally symmetrical manner, the insulating plate is movably clamped between two positioning rods, the insulating plate is made of boron nitride ceramic, a number of No. 1 heat dissipation grooves are evenly opened inside the insulating plate, a number of the No. 1 heat dissipation grooves are fixedly connected to the inside of the No. 1 heat dissipation nets, the No. 1 heat dissipation grooves and the heat dissipation nets are used to conduct the heat generated when the transformer body is working, a lifting mechanism is symmetrically fixedly installed on the outside of the body, and the lifting mechanism is used to suspend and transport the power transformer.

[0007] Preferably, a slot is provided on the outer side of the positioning rod, and positioning strips are fixedly connected to both ends of the insulating plate, and the positioning strips are slidably engaged in the slot.

[0008] Preferably, one end of the positioning rod is threadedly connected to a No. 1 positioning bolt, and one end of the No. 1 positioning bolt is fixedly connected to a positioning plate, and the positioning plate is used to block the entrance of the slot.

[0009] Preferably, the four corners of the body are fixedly connected to angle irons by bolts, and one side of the angle irons is fixedly connected to one side of the base plate by bolts.

[0010] Preferably, a heat dissipation chamber is symmetrically fixedly connected to the outer side of the device body, and a second heat dissipation slot is evenly opened inside the heat dissipation chamber, and the second heat dissipation slot is used to transfer the heat of the device body.

[0011] Preferably, the lifting mechanism includes a mounting frame, a mounting rail, and a lifting rope positioner. The two mounting rails are respectively fixedly mounted on the two ends of the mounting frame, and the lifting rope positioner is arranged above the mounting rails. The two mounting frames are respectively fixedly mounted on both sides of the device body by bolts, and one end of the mounting rail is fixedly connected to a block.

[0012] Preferably, the sling locator includes a mounting base, one end of which is fixedly connected to two mounting side plates, a positioning round rod is fixedly connected between the two mounting side plates, the positioning round rod is used to fix the cable, and the mounting base is slidably clamped on the outside of the mounting track.

[0013] Preferably, a positioning groove is provided at the other end of the mounting base, and a No. 2 positioning bolt is movably passed through the interior of the positioning groove, and one end of the No. 2 positioning bolt is threadedly connected to the interior of the mounting rail.

[0014] Preferably, a cable connecting plate is fixedly welded to the upper end of the body.

[0015] Preferably, the heat dissipation net is made of aluminum alloy, and a plurality of heat dissipation holes are evenly opened inside the heat dissipation net.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, the insulating plate made of boron nitride ceramic has excellent insulation performance. Its electrical properties such as relative dielectric constant enable it to effectively block current in an electric field. The insulating plate acts as a barrier to prevent electric field lines from passing through weak insulation points in the transformer body, thereby avoiding the occurrence of partial discharge.

[0018] 2. In the present invention, the No. 1 heat dissipation groove and the heat dissipation net transfer heat to the inside of the device body, and then the No. 2 heat dissipation groove on the heat dissipation bin on the device body transfers the heat to the external environment, completing the heat dissipation operation, effectively conducting the heat generated when the transformer body is working, and improving the heat dissipation efficiency of the fully insulated kV power transformer.

[0019] 3. In the present invention, when it is necessary to transport and install the fully insulated 1000 kV power transformer, the mounting base is slidably clamped to the outside of the mounting rail, the No. 2 positioning bolt is rotated and installed so that one end thereof is threadedly connected to the inside of the mounting rail, and then the rope is wrapped around the outside of the positioning round rod. With the help of lifting equipment, the fully insulated 1000 kV power transformer is lifted to the designated installation area. After the installation is completed, the lifting rope positioner can be removed to facilitate the transportation of the fully insulated 1000 kV power transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a fully insulated 145kV power transformer of the present invention;

[0021] Figure 2 This is a schematic diagram of the connection relationship between the insulation mechanism and the transformer body in a fully insulated 145kV power transformer of the present invention;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of an insulation mechanism in a fully insulated 145kV power transformer of the present invention;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of an insulating plate in a fully insulated 145kV power transformer of the present invention;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of a fully insulated 145kV power transformer body according to the present invention;

[0025] Figure 6This is a schematic diagram of the three-dimensional structure of a hoisting mechanism in a fully insulated 145kV power transformer of the present invention;

[0026] Figure 7 The present invention is a schematic diagram of the three-dimensional structure of a suspension rope positioner in a fully insulated 145kV power transformer.

[0027] In the figure: 1. Base plate; 2. Device body; 21. Angle iron; 22. Heat dissipation chamber; 221. Heat dissipation slot No. 2; 3. Transformer body; 4. Insulation mechanism; 41. Positioning rod; 411. Slot; 412. Positioning bolt No. 1; 42. Insulation plate; 421. Heat dissipation slot No. 1; 422. Heat dissipation net; 423. Heat dissipation hole; 424. Positioning clip; 5. Lifting mechanism; 5. Lifting mechanism; 51. Mounting frame; 52. Mounting rail; 521. Block; 53. Lifting rope locator; 531. Mounting base; 532. Mounting side panel; 533. Positioning round rod; 534. Positioning slot; 535. Positioning bolt No. 2; 6. Cable connecting plate. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] Example 1: Reference Figure 1 - Figure 5The application discloses a kind of full insulation 145kV power transformer, including bottom plate 1, the upper end of bottom plate 1 is fixedly connected with body 2 by bolt, transformer main body 3 is fixedly installed above bottom plate 1, the outside of transformer main body 3 is provided with insulation mechanism 4, insulation mechanism 4 is fixedly installed above bottom plate 1, insulation mechanism 4 includes locating rod 41 and insulating plate 42, four locating rods 41 are fixedly installed in the side of bottom plate 1 in central symmetry, insulating plate 42 is movably clamped between two locating rods 41, insulating plate 42 is made of boron nitride ceramic, a plurality of first heat dissipation grooves 421 are uniformly arranged in the inside of insulating plate 42, a plurality of first heat dissipation grooves 421 are fixedly connected with heat dissipation net 422, a plurality of first heat dissipation grooves 421 and heat dissipation net 422 are used to conduct the heat generated when transformer main body 3 works, the outside of body 2 is symmetrically fixedly installed with lifting mechanism 5, lifting mechanism 5 is used to suspend and carry power transformer, the outside of locating rod 41 is provided with clamping groove 411, the two ends of insulating plate 42 are respectively fixedly connected with positioning clamping strip 424, positioning clamping strip 424 is slidably clamped in the inside of clamping groove 411, one end of locating rod 41 is threadedly connected with first positioning bolt 412, one end of first positioning bolt 412 is fixedly connected with positioning disc, positioning disc is used to shield the slot mouth of clamping groove 411, the four corners of body 2 are fixedly connected with angle iron 21 by bolt, one side of angle iron 21 is fixedly connected to one side of bottom plate 1 by bolt, the upper end of body 2 is fixedly welded with cable connecting plate 6.

[0030] In the embodiment, by setting insulation mechanism 4 on the outside of transformer main body 3, when partial discharge occurs at the weak insulation part inside transformer main body 3, the insulating plate 42 made of boron nitride ceramic has excellent insulation performance, and its electrical properties such as relative permittivity enable it to effectively block current in the electric field, wherein the insulating plate 42 acts as a barrier to prevent electric field lines from passing out of the weak insulation part of transformer main body 3, thereby avoiding the occurrence of partial discharge phenomenon, and the chemical stability of boron nitride ceramic is good, and it will not chemically react with common substances in the operating environment of the transformer to cause a decrease in insulation performance, which ensures that the insulating plate 42 always maintains good insulation performance during long-term operation and continuously provides stable insulation protection for transformer main body 3; when assembling insulation mechanism 4, the positioning clamping strip 424 on the insulating plate 42 is clamped into the clamping groove 411 on the locating rod 41, and the positioning disc on the first positioning bolt 412 is rotated and installed to shield the slot mouth of the clamping groove 411, so that the positioning clamping strip 424 is stably clamped in the clamping groove 411, and the assembly operation of the insulation mechanism 4 is completed.

[0031] Embodiment two: Figure 1 - Figure 5As shown, a fully insulated 145kV power transformer includes a base plate 1, the upper end of the base plate 1 is fixedly connected to the body 2 by bolts, a transformer body 3 is fixedly installed above the base plate 1, an insulating mechanism 4 is provided on the outside of the transformer body 3, the insulating mechanism 4 is fixedly installed above the base plate 1, the insulating mechanism 4 includes a positioning rod 41 and an insulating plate 42, four positioning rods 41 are fixedly installed on one side of the base plate 1 in a centrally symmetrical manner, the insulating plate 42 is movably connected between the two positioning rods 41, the insulating plate 42 is made of boron nitride ceramic, a plurality of No. 1 heat dissipation grooves 421 are evenly opened inside the insulating plate 42, a plurality of No. 1 heat dissipation grooves 421 are fixedly connected to the inside of the plurality of No. 1 heat dissipation grooves 421, and the plurality of No. 1 heat dissipation grooves 421 and the heat dissipation net 422 are used to conduct the heat generated when the transformer body 3 is working, and a hoist is symmetrically fixedly installed on the outside of the body 2. Structure 5, the lifting mechanism 5 is used to suspend and transport the power transformer, a slot 411 is provided on the outside of the positioning rod 41, and both ends of the insulating plate 42 are fixedly connected with positioning strips 424, and the positioning strips 424 are slidably connected to the inside of the slot 411, and one end of the positioning rod 41 is threadedly connected to a No. 1 positioning bolt 412, and one end of the No. 1 positioning bolt 412 is fixedly connected to a positioning plate, and the positioning plate is used to block the entrance of the slot 411, and the four corners of the device body 2 are fixedly connected with angle irons 21 by bolts, and one side of the angle iron 21 is fixedly connected to one side of the base plate 1 by bolts, and the outside of the device body 2 is symmetrically fixed with a heat dissipation bin 22, and the interior of the heat dissipation bin 22 is evenly provided with No. 2 heat dissipation slots 221, which are used to transfer the heat of the device body 2, and the heat dissipation net 422 is made of aluminum alloy, and the interior of the heat dissipation net 422 is evenly provided with a number of heat dissipation holes 423.

[0032] In this embodiment, by evenly opening a plurality of No. 1 heat dissipation grooves 421 inside the insulating plate 42, and installing a heat dissipation net 422 inside the No. 1 heat dissipation groove 421, the No. 1 heat dissipation groove 421 and the heat dissipation net 422 can effectively conduct the heat generated when the transformer body 3 is working, thereby improving the heat dissipation efficiency of the fully insulated 145kV power transformer, so that the fully insulated 145kV power transformer will not overheat or overload when working for a long time; in addition, by symmetrically fixedly connecting the heat dissipation bin 22 to the outside of the body 2, the No. 1 heat dissipation groove 421 and the heat dissipation net 422 are connected to the heat dissipation bin 22. The heat dissipation net 422 transfers heat to the interior of the device body 2, and then the No. 2 heat dissipation slot 221 on the heat dissipation chamber 22 on the device body 2 transfers the heat to the external environment to complete the heat dissipation operation; the heat dissipation net 422 is made of aluminum alloy, which can effectively conduct the heat generated by the transformer, and the mechanical strength of the heat dissipation net 422 made of aluminum alloy is significantly improved, which makes the heat dissipation net 422 not easy to deform when subjected to certain external forces such as wind pressure, vibration, etc., and the aluminum alloy material improves the corrosion resistance of the heat dissipation net 422 and extends the service life of the heat dissipation net 422.

[0033] Example 3: According to Figure 1 -Figure 7 As shown, an all-insulated 145kV power transformer, including the base plate 1, the upper end of the base plate 1 is fixedly connected with the body 2 through bolts, the upper side of the base plate 1 is fixedly installed with the transformer body 3, the outer side of the transformer body 3 is provided with the insulation mechanism 4, the insulation mechanism 4 is fixedly installed on the upper side of the base plate 1, the insulation mechanism 4 includes the positioning rod 41 and the insulation plate 42, four positioning rods 41 are fixedly installed on one side of the base plate 1 in a central symmetric manner, the insulation plate 42 is movably clamped between two positioning rods 41, the insulation plate 42 is made of boron nitride ceramic, a plurality of first heat dissipation grooves 421 are uniformly formed in the insulation plate 42, a plurality of first heat dissipation grooves 421 are fixedly connected with the heat dissipation net 422, a plurality of first heat dissipation grooves 421 and the heat dissipation net 422 are used to conduct the heat generated by the transformer body 3 during operation, the outer side of the body 2 is symmetrically fixedly installed with the hoisting mechanism 5, the hoisting mechanism 5 is used to suspend and transport the power transformer. The hoisting mechanism 5 includes the mounting bracket 51, the mounting rail 52 and the hoisting rope positioner 53, two mounting rails 52 are fixedly installed at two ends of the mounting bracket 51 respectively, the hoisting rope positioner 53 is arranged above the mounting rail 52, two mounting brackets 51 are fixedly installed at two sides of the body 2 through bolts respectively, one end of the mounting rail 52 is fixedly connected with the stop block 521, the hoisting rope positioner 53 includes the mounting base 531, one end of the mounting base 531 is fixedly connected with two mounting side plates 532 respectively, the two mounting side plates 532 are fixedly connected with the positioning round rod 533 between them, the positioning round rod 533 is used to fix the cable, the mounting base 531 is slidingly clamped on the outer side of the mounting rail 52, the other end of the mounting base 531 is provided with the positioning groove 534, the second positioning bolt 535 is movably penetrated into the positioning groove 534, one end of the second positioning bolt 535 is threadedly connected in the mounting rail 52.

[0034] In this embodiment, when it is necessary to transport and install the all-insulated 145kV power transformer, the mounting base 531 is slidingly clamped on the outer side of the mounting rail 52, the second positioning bolt 535 is rotated so that one end thereof is threadedly connected in the mounting rail 52, the rope is wound around the outer side of the positioning round rod 533, the all-insulated 145kV power transformer is hoisted to the designated installation area by means of the hoisting equipment, after installation, the hoisting rope positioner 53 can be disassembled, which is convenient for repeated use in subsequent transportation operation.

[0035] The working principle and method of using the device: when the transformer body 3 inside the weak insulation part appears partial discharge, the insulating plate 42 can effectively block the current in the electric field, wherein the insulating plate 42 as a barrier, prevent the electric field line from the weak insulation part of the transformer body 3 out; When assembling the insulation mechanism 4, the positioning clamping strip 424 on the insulating plate 42 is clamped into the clamping groove 411 on the positioning rod 41, and the first positioning bolt 412 is rotated and installed, so that the positioning disc on the first positioning bolt 412 blocks the inlet slot of the clamping groove 411, and the positioning clamping strip 424 is stably clamped in the clamping groove 411, the assembly operation of the insulation mechanism 4 is completed; When the full insulation 145kV power transformer is cooled, the first heat dissipation groove 421 and the heat dissipation net 422 transfer heat to the inside of the body 2, and then the second heat dissipation groove 221 on the heat dissipation bin 22 on the body 2 transfers heat to the outside environment, and the cooling operation is completed; When the full insulation 145kV power transformer needs to be transported and installed, the installation base 531 is slidably clamped to the outside of the installation rail 52, the second positioning bolt 535 is rotated and installed, one end of which is threadedly connected to the inside of the installation rail 52, and then the rope is wound around the outside of the positioning round rod 533. The full insulation 145kV power transformer is hoisted to the designated installation area by the hoisting equipment, and the hoisting rope positioner 53 can be disassembled after installation.

[0036] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to part of the technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A fully insulated 145 kV power transformer, comprising a base plate (1), characterized in that: The upper end of the base plate (1) is fixedly connected to the body (2) by bolts, and a transformer body (3) is fixedly installed above the base plate (1). An insulating mechanism (4) is provided on the outside of the transformer body (3), and the insulating mechanism (4) is fixedly installed above the base plate (1). The insulating mechanism (4) includes positioning rods (41) and insulating plates (42). Four positioning rods (41) are fixedly installed on one side of the base plate (1) in a centrally symmetrical manner. The insulating plates (42) are movably connected to the two positioning rods (41). 1), the insulating plate (42) is made of boron nitride ceramics, a plurality of No. 1 heat dissipation slots (421) are evenly opened inside the insulating plate (42), a heat dissipation net (422) is fixedly connected inside the plurality of No. 1 heat dissipation slots (421), the plurality of No. 1 heat dissipation slots (421) and the heat dissipation net (422) are used to conduct heat generated when the transformer body (3) is working, and a lifting mechanism (5) is symmetrically fixedly installed on the outside of the body (2), and the lifting mechanism (5) is used to suspend and transport the power transformer; A slot (411) is provided on the outer side of the positioning rod (41), and positioning strips (424) are fixedly connected to both ends of the insulating plate (42), and the positioning strips (424) are slidably engaged with the interior of the slot (411); One end of the positioning rod (41) is threadedly connected to a No. 1 positioning bolt (412), and one end of the No. 1 positioning bolt (412) is fixedly connected to a positioning plate, and the positioning plate is used to block the slot entrance of the card slot (411); The four corners of the body (2) are fixedly connected to angle irons (21) by bolts, and one side of the angle iron (21) is fixedly connected to one side of the bottom plate (1) by bolts; The outer side of the device body (2) is symmetrically fixedly connected with a heat dissipation chamber (22), and the interior of the heat dissipation chamber (22) is evenly provided with second heat dissipation slots (221), and the second heat dissipation slots (221) are used to transfer heat from the device body (2); The lifting mechanism (5) comprises a mounting frame (51), a mounting rail (52), and a lifting rope positioner (53); the two mounting rails (52) are fixedly mounted on both ends of the mounting frame (51), the lifting rope positioner (53) is arranged above the mounting rails (52), the two mounting frames (51) are fixedly mounted on both sides of the device body (2) by bolts, and one end of the mounting rail (52) is fixedly connected to a stopper (521); The rope locator (53) includes a mounting base (531), one end of the mounting base (531) is fixedly connected to two mounting side plates (532), a positioning round rod (533) is fixedly connected between the two mounting side plates (532), and the positioning round rod (533) is used to fix the cable, and the mounting base (531) is slidably connected to the outer side of the mounting track (52); The other end of the mounting base (531) is provided with a positioning groove (534), and a second positioning bolt (535) is movably passed through the interior of the positioning groove (534), and one end of the second positioning bolt (535) is threadedly connected to the interior of the mounting track (52).

2. A fully insulated 145kV power transformer according to claim 1, characterized in that: A cable connection plate (6) is fixedly welded to the upper end of the body (2).

3. A fully insulated 145kV power transformer according to claim 1, characterized in that: The heat dissipation net (422) is made of aluminum alloy, and a plurality of heat dissipation holes (423) are evenly arranged inside the heat dissipation net (422).

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