Novel primary energy efficiency dry-type transformer

Abstract

The utility model relates to a novel primary energy efficiency dry-type transformer. The problems that in the prior art, a transformer is poor in protection effect and difficult to meet the higher and higher energy-saving requirement are solved. The transformer comprises a mounting underframe, a protective frame is arranged on the mounting underframe, a transformer body is positioned in the protective frame and comprises an iron core, a low-voltage coil and a high-voltage coil, a high-voltage wiring terminal is arranged on one side of the high-voltage coil, outlet terminals are arranged at the upper end and the lower end of the high-voltage coil, and a plurality of tapping terminal structures are arranged in the middle of the high-voltage coil. Low-voltage leads are arranged on the other sides of the high-voltage coils, the low-voltage leads located on the same transformer body are connected through connecting copper bars, and the low-voltage leads located on different transformer bodies are connected through bridging leads. The utility model has the advantages that the operation reliability of the transformer is improved, the loss is reduced, the energy-saving level, the insulation characteristic and the impact resistance of the transformer are improved, the partial discharge capacity is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a novel first-level energy-efficient dry-type transformer. Background Art

[0002] Transformers are important equipment in power generation, power supply and power consumption enterprises. They also occupy an extremely critical position in the power grid. They are extremely important equipment to ensure the safe and reliable operation of the power grid and people's production and life electricity consumption. The structure and material of the transformer directly affect the quality and safety of power supply. Although the transformer is a mature technology, it is still necessary to continuously improve the transformer according to the needs of existing transformers. Among them, ordinary epoxy cast transformer coils usually use a variety of insulating media, and the overall thermal expansion change rate and dielectric electric field uniformity of the coil are poor. After being put into operation, cracks are prone to occur, which not only affects the service life of the coil, but also significantly increases the probability of partial discharge, which seriously affects the safety of power supply and use; in addition, the existing transformer protection effect is not good, and it is difficult to adapt to the increasingly high energy-saving needs.

[0003] In order to solve the deficiencies of the prior art, people have conducted long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a dry-type transformer [CN201310006945.X], which includes a shell; an iron core arranged in the shell, the iron core includes four juxtaposed iron core bodies, and the iron core bodies are formed of an amorphous alloy; a coil winding, the coil windings are respectively sleeved on a core formed by the juxtaposed parts of adjacent iron core bodies, and each coil winding includes: a low-voltage winding, the low-voltage winding is respectively sleeved on the core; a high-voltage winding, the high-voltage winding is respectively wound on each low-voltage winding adjacent to each other, and the high-voltage windings wound on each low-voltage winding are connected in series with each other, the high-voltage winding includes multiple layers of high-voltage coils wound on the low-voltage winding, and the number of turns of each layer of high-voltage coils gradually decreases along the direction from the core to the outside; wherein the gaps in the coil windings are filled with epoxy resin.

[0004] The above solution has solved to a certain extent the problem in the prior art that the transformer coil has a short service life and the probability of partial discharge is significantly increased, which affects the safety of power supply and use. However, the solution still has many shortcomings, such as: poor protection effect, and difficulty in adapting to the increasingly high energy-saving needs. Summary of the invention

[0005] The purpose of the utility model is to provide a novel first-level energy-efficient dry-type transformer in view of the above problems.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a new type of first-level energy-efficient dry-type transformer, including a mounting frame, a protective frame with a loading cavity is provided on the mounting frame, a transformer body is positioned in the protective frame, the transformer body includes an iron core, a low-voltage coil and a high-voltage coil, a high-voltage terminal is provided on one side of the high-voltage coil, and outlet terminals are provided at the upper and lower ends of the high-voltage coil, a plurality of tap terminal structures are provided in the middle of the high-voltage coil, and a low-voltage lead is provided on the other side of the high-voltage coil, and the low-voltage leads on the same transformer body are connected by connecting copper bars, and the low-voltage leads on different transformer bodies are connected by jumper leads.

[0007] In the above-mentioned new type of first-level energy-efficient dry-type transformer, the iron core is a stepped superimposed iron core, and adjacent iron cores are connected by overlapping seams without core layers, and a shock-absorbing structure is provided between the transformer bodies.

[0008] In the above-mentioned new type of first-level energy-efficient dry-type transformer, the shock-absorbing structure includes a flexible connection seat arranged between two adjacent transformer bodies, a vacuum oil pipe is arranged in the middle of the flexible connection seat, and an oil filling port is arranged on the vacuum oil pipe, and the flexible connection seat is insulating rubber.

[0009] In the above-mentioned new type of primary energy-efficient dry-type transformer, the low-voltage coil and the high-voltage coil are insulated by solvent-free mesh cloth.

[0010] In the above-mentioned novel first-level energy-efficient dry-type transformer, the tap terminal structure includes at least 6 tap terminals, bosses are cast at the bottom of the tap terminals, and the bosses have the same height, and tap shields are provided on the outer circumferential sides of the tap terminals.

[0011] In the above-mentioned new type of first-level energy-efficient dry-type transformer, an insulating sheath is provided on the outgoing terminal.

[0012] In the above-mentioned novel first-level energy-efficient dry-type transformer, an elastic buffer is provided around the protective frame, the surface of the elastic buffer is closed by a flexible cover structure, and a sliding wheel is rotatably provided on one side of the supporting block at the bottom of the protective frame through a plug-in groove.

[0013] In the above-mentioned new type of first-level energy-efficient dry-type transformer, a frame lifting mechanism is longitudinally provided on one side of the protective frame, and one end of the frame lifting mechanism is connected to the support block located at the bottom of the protective frame, and the other end is fixedly arranged on the support frame at the top of the protective frame.

[0014] In the above-mentioned new type of first-level energy-efficient dry-type transformer, a noise detection module is respectively arranged on the transformer body, a voltage detection module is respectively arranged at the input and output ends of the transformer body, an oil temperature detection module is arranged on the shock-absorbing structure, and the noise detection module, the voltage detection module and the oil temperature detection module are respectively connected to the monitoring platform.

[0015] In the above-mentioned new type of first-level energy-efficient dry-type transformer, a digital display screen for displaying detection parameters is provided on the support frame.

[0016] Compared with the existing technology, the advantages of the utility model are:

[0017] 1. Improve the operation reliability of the transformer, reduce losses, improve the energy saving level, insulation characteristics, and impact resistance of the transformer, reduce partial discharge, and extend the service life of the transformer;

[0018] 2. Block the radial propagation of the inner ring core noise, greatly reducing the propagation of noise;

[0019] 3. The frame lifting mechanism can realize the free disassembly and assembly of the sliding wheel at the bottom of the protection frame, which has good flexibility. The operation is convenient, and the elastic buffer components and flexible cover structure arranged around the protection frame form protection around the protection frame, which can effectively reduce external impact and has good protection performance;

[0020] 4. The frame lifting mechanism can realize the free disassembly and assembly of the sliding wheel body at the bottom of the protective frame, which has good flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a side view of the utility model;

[0023] Figure 3 It is a top view of a local structure in the utility model;

[0024] Figure 4 It is a schematic diagram of the tap terminal structure in the utility model;

[0025] Figure 5 It is a cross-sectional view of the protective frame in the utility model;

[0026] Figure 6 It is a local structural connection block diagram in the utility model;

[0027] In the figure: installation base 1, protection frame 2, elastic buffer 21, flexible cover structure 22, support block 23, plug-in slot 24, sliding wheel body 25, frame lifting mechanism 26, support frame 27, transformer body 3, iron core 31, low voltage coil 32, high voltage coil 33, high voltage terminal 331, outlet terminal 332, tap terminal structure 4, tap terminal 41, boss 42, tap shield 43, low voltage lead 5, connecting copper bus 6, jumper lead 7, shock absorbing structure 8, flexible connecting seat 81, vacuum oil pipe 82, oil filling port 83, solvent-free mesh cloth 84, monitoring platform 9, noise detection module 91, voltage detection module 92, oil temperature detection module 93, digital display screen 94. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] like Figure 1-6 As shown, the novel primary energy efficiency dry-type transformer comprises a mounting base 1, on which a protective frame 2 having a loading cavity is provided, a transformer body 3 is positioned in the protective frame 2, the transformer body 3 comprises an iron core 31, a low-voltage coil 32 and a high-voltage coil 33, a high-voltage terminal 331 is provided on one side of the high-voltage coil 33, and outlet terminals 332 are provided at the upper and lower ends of the high-voltage coil 33, a plurality of tapping terminal structures 4 are provided in the middle of the high-voltage coil 33, and a low-voltage lead 5 is provided on the other side of the high-voltage coil 33, and the low-voltage leads 5 located on the same transformer body 3 are connected by connecting copper bars 6, and the low-voltage leads 5 located on different transformer bodies 3 are connected by jumper leads 7.

[0030] By arranging the connection of the outlet terminal 332, the tap terminal structure 4, the high-voltage terminal 331, and the low-voltage lead 5, the loss is reduced and the energy-saving level of the transformer is improved, and its energy-saving level reaches a new level of energy efficiency.

[0031] By providing the jumper lead 7 at the low voltage lead 5 , the resistance difference between the low voltage leads 5 is reduced.

[0032] The iron core 31 is a stepped stacked iron core 31 , and adjacent iron cores 31 are overlapped by a core-free layer 34 , and a shock absorbing structure 8 is provided between the transformer bodies 3 .

[0033] Obviously, the shock absorbing structure 8 comprises a flexible connection seat 81 arranged between two adjacent transformer bodies 3, a vacuum oil pipe 82 is arranged in the middle of the flexible connection seat 81, and an oil filling port 83 is arranged on the vacuum oil pipe 82, and the flexible connection seat 81 is made of insulating rubber.

[0034] The overlap joints of the core-free layer 34 are used to eliminate the vibration of the core 31 by interlayer damping, and the rigid contact is eliminated by vacuum oiling, so as to block the radial propagation of the noise of the inner ring core 31 and greatly reduce the noise generated by the coil resonance.

[0035] Furthermore, the low-voltage coil 32 and the high-voltage coil 33 are insulated by a solvent-free mesh cloth 84 .

[0036] By using the solvent-free mesh cloth 84 as coil insulation, the amount of partial discharge can be reduced and the energy saving effect can be improved.

[0037] Specifically, the tap terminal structure 4 includes at least 6 tap terminals 41 . A boss 42 is cast at the bottom of the tap terminal 41 . The bosses 42 have the same height. A tap shield 43 is provided on the outer side of the tap terminal 41 in the circumferential direction.

[0038] Furthermore, an insulating sheath is provided on the outlet terminal 332 .

[0039] The shielding setting basically isolates the exposed live parts from the outside world, reducing the impact of the environment on the transformer.

[0040] More specifically, the protective frame 2 is circumferentially provided with an elastic buffer 21 , the surface of the elastic buffer 21 is closed by a flexible cover structure 22 , and a sliding wheel 25 is rotatably provided on one side of a support block 23 at the bottom of the protective frame 2 through a plug-in slot 24 .

[0041] In detail, a frame lifting mechanism 26 is longitudinally provided on one side of the protection frame 2 , and one end of the frame lifting mechanism 26 is connected to the support block 23 located at the bottom of the protection frame 2 , and the other end is fixedly arranged on the support frame 27 at the top of the protection frame 2 .

[0042] The elastic buffer 21 and the flexible cover structure 22 are used to prevent rigid collision damage and improve the protection effect. Secondly, the protection frame 2 can be lifted by the frame lifting mechanism 26, so that the sliding wheel body 25 rotates and falls to achieve rapid movement.

[0043] Preferably, a noise detection module 91 is respectively provided on the transformer body 3, a voltage detection module 92 is respectively provided at the input and output ends of the transformer body 3, an oil temperature detection module 93 is provided on the shock absorbing structure 8, and the noise detection module 91, the voltage detection module 92 and the oil temperature detection module 93 are respectively connected to the monitoring platform 9.

[0044] In addition, the support frame 27 is provided with a digital display screen 94 for displaying detection parameters.

[0045] The transformer integrated control device using GPRS wireless network technology is used here to target possible anomalies during system operation, such as noise, load, oil temperature, poor voltage stability, etc. Based on the data from various sensors, combined with self-strategy optimization and compensation load configuration strategies, the system management, equipment status assessment, and fault diagnosis of the transformer are achieved.

[0046] At the same time, in the optional products, a zero-flux core-through AC small signal sensor is designed to monitor the insulation performance of capacitive equipment. By optimizing the multi-layer shielding structure and compensating for temperature, the product can measure 0-800mA AC current signals with high precision and stability in industrial environments.

[0047] To sum up, the principle of this embodiment is: by arranging the connection of the outlet terminal 332, the tap terminal structure 4, the high-voltage terminal 331, and the low-voltage lead 5, the loss is reduced, and by setting the jumper lead 7 at the low-voltage lead 5, the resistance difference between the low-voltage leads 5 is reduced, thereby improving the energy saving level of the transformer; secondly, by lap joints without the core layer 34, the interlayer damping is eliminated to offset the vibration of the core 31, and vacuum oiling is used to eliminate rigid contact, block the radial propagation of the noise of the inner ring core 31, and reduce the noise generated by the coil resonance. Finally, the elastic buffer component and the flexible cover structure arranged on the circumference of the protective frame are used to form protection for the circumference of the protective frame, reduce the damage caused by external impact, and improve the protection performance.

[0048] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0049] Although this article uses more terms such as mounting base 1, protective frame 2, elastic buffer 21, flexible cover structure 22, support block 23, plug slot 24, sliding wheel body 25, frame lifting mechanism 26, support frame 27, transformer body 3, iron core 31, low voltage coil 32, high voltage coil 33, high voltage terminal 331, outlet terminal 332, tap terminal structure 4, tap terminal 41, boss 42, tap shield 43, low voltage lead 5, connecting copper bar 6, jumper lead 7, shock absorbing structure 8, flexible connection seat 81, vacuum oil pipe 82, oil filling port 83, solvent-free mesh cloth 84, monitoring platform 9, noise detection module 91, voltage detection module 92, oil temperature detection module 93, digital display screen 94, etc., it does not exclude the possibility of using other terms. The use of these terms is only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A novel first-level energy efficiency dry-type transformer, comprising a mounting frame (1), wherein a protective frame (2) having a loading cavity is disposed on the mounting frame (1), a transformer body (3) is positioned in the protective frame (2), and the transformer body (3) comprises an iron core (31), a low-voltage coil (32) and a high-voltage coil (33), wherein: A high-voltage terminal (331) is provided on one side of the high-voltage coil (33), and outlet terminals (332) are provided at the upper and lower ends of the high-voltage coil (33); a plurality of tapping terminal structures (4) are provided in the middle of the high-voltage coil (33), and a low-voltage lead (5) is provided on the other side of the high-voltage coil (33); the low-voltage leads (5) located on the same transformer body (3) are connected by connecting copper bars (6), and the low-voltage leads (5) located on different transformer bodies (3) are connected by jumper leads (7); the iron core (31) is a stepped stacked iron core (31), and adjacent iron cores (31) are overlapped by a non-iron core layer (34); the transformer bodies (3) are connected by a plurality of tapping terminal structures (4). A shock absorbing structure (8) is provided between the two adjacent transformer bodies (3); the shock absorbing structure (8) comprises a flexible connection seat (81) arranged between two adjacent transformer bodies (3); a vacuum oil pipe (82) is provided in the middle of the flexible connection seat (81), and an oil filling port (83) is provided on the vacuum oil pipe (82); the flexible connection seat (81) is made of insulating rubber; the low-voltage coil (32) and the high-voltage coil (33) are insulated by a solvent-free mesh cloth (84); the tap terminal structure (4) comprises at least 6 tap terminals (41); a boss (42) is cast at the bottom of the tap terminal (41), and the bosses (42) have the same height; an insulating sheath is provided on the outlet terminal (332).

2. The novel first-level energy-efficient dry-type transformer according to claim 1 is characterized in that: The protective frame (2) is provided with an elastic buffer (21) in the circumferential direction, the surface of the elastic buffer (21) is sealed by a flexible cover structure (22), and a sliding wheel (25) is rotatably provided on one side of a support block (23) at the bottom of the protective frame (2) through a plug-in slot (24).

3. The novel first-level energy-efficient dry-type transformer according to claim 2 is characterized in that: A frame lifting mechanism (26) is longitudinally provided on one side of the protection frame (2), and one end of the frame lifting mechanism (26) is connected to a support block (23) located at the bottom of the protection frame (2), and the other end is fixedly arranged on a support frame (27) at the top of the protection frame (2).

4. The novel first-level energy-efficient dry-type transformer according to claim 1 is characterized in that: A noise detection module (91) is respectively arranged on the transformer body (3), a voltage detection module (92) is respectively arranged on the input end and the output end of the transformer body (3), an oil temperature detection module (93) is arranged on the shock absorbing structure (8), and the noise detection module (91), the voltage detection module (92) and the oil temperature detection module (93) are respectively connected to the monitoring platform (9).

5. The novel first-level energy-efficient dry-type transformer according to claim 3 is characterized in that: The support frame (27) is provided with a digital display screen (94) for displaying detection parameters.

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