First-level energy efficiency 10kV dry-type transformer

Abstract

The utility model provides a primary energy efficiency 10kV dry-type transformer, which solves the problem that the transformer is lack of a heat dissipation diversion structure and the like, and comprises a closed shell, an iron core and a high-low voltage winding are arranged in the closed shell, an isolation frame is reserved between the closed shell and the high-low voltage winding, and the isolation frame is connected with an insulation rib plate. A diversion channel is reserved between the insulation rib plates, a fixing plate is arranged in the high-voltage winding and the low-voltage winding, a hollowed-out mechanism is arranged on the fixing plate, the diversion channel is communicated with the hollowed-out mechanism, and a heat dissipation mechanism communicated with the diversion channel is arranged on the side face of the closed shell. The LED lamp has the advantages of being good in heat dissipation effect, stable in structure and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of dry-type transformers, and specifically relates to a first-level energy efficiency 10kV dry-type transformer. Background Art

[0002] Dry-type transformers are widely used in local lighting, high-rise buildings, airports, docks, CNC machinery and equipment and other places. Simply put, dry-type transformers refer to transformers whose cores and windings are not immersed in insulating oil. The cooling methods are divided into natural air cooling and forced air cooling. When naturally cooled, the transformer can operate continuously for a long time at rated capacity. When forced air cooling, the transformer output capacity can be increased by 50%. It is suitable for intermittent overload operation or emergency overload operation; due to the large increase in load loss and impedance voltage during overload, it is in a non-economic operation state, so it should not be in long-term continuous overload operation. In addition, in actual use, the existing dry-type transformers lack the corresponding guide structure inside, which affects the heat dissipation effect of each winding.

[0003] In order to solve the deficiencies in the prior art, people have conducted long-term explorations and proposed various solutions. For example, a Chinese patent document discloses a dry-type wound core transformer [202021113116.3], which includes a box body, the front left and front right parts of the box body are both movably connected to the box door through hinges, and the middle parts of the front ends of the two sets of box doors are commonly fixedly connected with a door lock mechanism, the lower left end and the lower right end of the box body are both provided with heat dissipation windows, the lower left end and the lower right end of the box body are both fixedly connected with rain shields, and the rain shields are located directly above the heat dissipation windows, the upper left end and the upper right end of the box body are both fixedly connected with connecting plates, the upper end of the box body is fixedly connected with a ventilation device, the lower left end and the lower right end of the ventilation device respectively penetrate the middle parts of the upper ends of the two sets of connecting plates and are fixedly connected with fixed blocks, and the upper end of the ventilation device is fixedly connected with a rain shield.

[0004] The above solution solves the problem of accelerating heat dissipation of the transformer to a certain extent, but the solution still has many shortcomings, such as the lack of corresponding internal guide structure and other problems. Summary of the invention

[0005] The purpose of the utility model is to provide a first-class energy-efficient 10kV dry-type transformer with reasonable design and good heat dissipation and flow conduction effect in view of the above problems.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a first-level energy efficiency 10kV dry-type transformer, comprising a closed shell, a built-in iron core and high and low voltage windings in the closed shell, an isolation frame is left between the closed shell and the high and low voltage windings, the isolation frame is connected with insulating ribs, a guide channel is left between the insulating ribs, the high and low voltage windings have built-in fixed plates, a hollow mechanism is arranged on the fixed plate, the guide channel is connected to the hollow mechanism, and a heat dissipation mechanism connected to the guide channel is arranged on the side of the closed shell.

[0007] In the above-mentioned first-level energy efficiency 10kV dry-type transformer, the isolation frame includes isolation beams respectively arranged at the upper and lower ends of the high and low voltage windings, the isolation beams have an I-shaped cross section, and the isolation beams have isolation feet in contact with the upper and lower ends of the closed shell.

[0008] In the above-mentioned first-level energy efficiency 10kV dry-type transformer, the insulating rib plate is connected to the isolation beam and is attached to the outside of the high and low voltage windings in the vertical direction. The cross-section of the insulating rib plate is T-shaped, and the guide channel is located between the two sides of the isolation beam and the insulating rib plate. An air inlet is provided at the lower end of the closed shell, an isolation net is provided at the air inlet, and an air outlet and an isolation cover covering the air outlet are provided at the upper end of the closed shell.

[0009] In the above-mentioned first-level energy efficiency 10kV dry-type transformer, the heat dissipation mechanism includes a heat dissipation plate covering the outside of the closed shell, heat dissipation ribs are arranged on the surface of the heat dissipation plate, and a heat conductive layer is left between the heat dissipation plate and the closed shell.

[0010] In the above-mentioned first-level energy efficiency 10kV dry-type transformer, the fixed plate is vertically fixed between the high and low voltage windings by resin glue, and the hollow mechanism includes a hollow cavity arranged in the fixed plate, and a hollow groove connected to the hollow cavity is opened on the surface of the fixed plate, and the upper and lower ends of the hollow cavity are connected to the guide channel.

[0011] In the above-mentioned first-level energy efficiency 10kV dry-type transformer, the closed shell includes a main shell, and recessed mounting surfaces are arranged on the outside of both sides of the main shell. The heat dissipation mechanism is fixed on the mounting surface. A closed cover is arranged at the upper end of the main shell, and a closed base is arranged at the lower end of the main shell.

[0012] In the above-mentioned first-level energy efficiency 10kV dry-type transformer, a closed base is provided with a guide cavity corresponding to each iron core and high and low voltage winding one by one, and the guide cavity is provided with guide plates symmetrically arranged relative to the center of the guide cavity. The guide plates are bent and a spiral guide gap is left between adjacent guide plates. A guide hole connected to the guide gap is opened on the outer side of the closed base, and the upper end of the center of the guide cavity is relatively connected to the air inlet.

[0013] In the above-mentioned first-level energy efficiency 10kV dry-type transformer, the closing cover and the closing base are connected to the main housing through threaded parts respectively, and a lifting ring is fixed on the upper end of the closing cover.

[0014] In the above-mentioned first-level energy efficiency 10kV dry-type transformer, a temperature sensor is built into the closed shell, and a heat dissipation fan opposite to the air outlet is installed at the lower end of the closed cover.

[0015] In the above-mentioned first-class energy efficiency 10kV dry-type transformer, an operation opening is opened on the side of the closed shell, and the operation opening is closed by a hinged opening and closing door.

[0016] Compared with the existing technology, the advantages of the utility model are: a guide structure is arranged between the closed shell and the high and low voltage windings, which cooperates with the hollow structure and the heat dissipation mechanism to guide the heat to be quickly discharged to ensure the heat dissipation effect; a spiral air intake structure is arranged at the lower end of the closed shell to guide the air to be spirally introduced to provide the air intake inside the closed shell; the heat dissipation fan cooperates with the temperature sensor to realize negative feedback regulation, thereby realizing active air intake and heat dissipation of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a structural sectional view of the utility model;

[0019] Figure 3 It is another structural sectional view of the utility model;

[0020] Figure 4 It is a partial cross-sectional view of the utility model;

[0021] In the figure, a closed shell 1, a main shell 11, a mounting surface 12, a closed cover 13, a closed base 14, a guide cavity 15, a guide plate 16, a guide gap 17, a guide hole 18, a cooling fan 19, an operating port 191, an opening and closing door 192, an iron core 2, a high and low voltage winding 3, an isolation frame 4, an isolation beam 41, an isolation foot 42, an isolation net 43, an air outlet 44, an isolation cover 45, an insulating rib plate 5, a guide channel 6, a fixing plate 7, a hollow mechanism 8, a hollow cavity 81, a hollow groove 82, a heat dissipation mechanism 9, a heat dissipation plate 91, heat dissipation ribs 92, and a thermal conductive layer 93. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] like Figure 1-4As shown, a first-level energy efficiency 10kV dry-type transformer includes a closed shell 1 with a rectangular box structure, an iron core 2 and high and low voltage windings 3 are built in the closed shell 1 to realize dry-type transformation, an isolation frame 4 is left between the closed shell 1 and the high and low voltage windings 3 to ensure their relative isolation, and an insulating rib plate 5 is connected to the isolation frame 4, and a guide channel 6 is left between the insulating rib plates 5, and the guide channel 6 surrounds the high and low voltage windings 3 circumferentially. A fixed plate 7 is built in the high and low voltage windings 3, and a hollow mechanism 8 is arranged on the fixed plate 7. The hollow mechanism 8 keeps the windings relatively isolated on the one hand, and realizes air flow on the other hand, so as to improve the heat dissipation effect of the windings. The guide channel 6 is connected to the hollow mechanism 8, and a heat dissipation mechanism 9 connected to the guide channel 6 is arranged on the side of the closed shell 1. The guide channel 6 guides the air to flow evenly through the high and low voltage windings 3 to realize the hot air discharge inside the closed shell 1, and the heat dissipation mechanism 9 ensures the heat dissipation effect of the side wall of the closed shell 1.

[0024] Specifically, the isolation frame 4 includes an isolation beam 41 respectively arranged at the upper and lower ends of the high and low voltage windings 3. The terminal ends of the high and low voltage windings 3 pass through the isolation beam 41 and extend outward. The cross-section of the isolation beam 41 is I-shaped and opposite to the top of the closed shell 1. The isolation beam 41 has an isolation foot 42 in contact with the upper and lower ends of the closed shell 1. The isolation foot 42 is made of an insulating flexible material, which on the one hand improves its insulating isolation effect, and on the other hand plays a damping and vibration reduction role.

[0025] In order to improve the supporting effect of the isolation beam 41, the insulating rib plate 5 is connected to the isolation beam 41 and is attached to the outside of the high and low voltage windings 3 in the vertical direction. The cross section of the insulating rib plate 5 is T-shaped to maintain its supporting strength, and the ribs in the middle of the insulating rib plate 5 extend toward the side wall of the closed shell 1. The guide channel 6 is located between the two sides of the isolation beam 41 and the insulating rib plate 5. The closed shell 1 is provided with an air inlet 42 at the lower end, and an isolation net 43 is provided at the air inlet 42. The upper end of the closed shell 1 is provided with an air outlet 44 and an isolation cover 45 covering the air outlet 44. The isolation cover 45 prevents rainwater from invading the closed shell 1. The guide channel 6 between the insulating rib plates 5 uses convection to achieve automatic heat exchange.

[0026] Furthermore, similar to the conventional heat dissipation rib structure, the heat dissipation mechanism 9 in the present application includes a heat dissipation plate 91 covering the outside of the closed shell 1, and heat dissipation ribs 92 are arranged on the surface of the heat dissipation plate 91. A heat conductive layer 93 is left between the heat dissipation plate 91 and the closed shell 1 to improve the heat exchange efficiency. The heat dissipation ribs 92 adopt a detachable structure, and the gaps therein are completely filled by the heat conductive layer 93.

[0027] Furthermore, the fixing plate 7 is vertically fixed between the high and low voltage windings 3 by resin glue to play an isolation role, wherein the hollow mechanism 8 includes a hollow cavity 81 arranged in the fixing plate 7, and a hollow groove 82 connected to the hollow cavity 81 is opened on the surface of the fixing plate 7, and part of the resin is filled in the hollow groove 82 to improve its supporting stability, and the upper and lower ends of the hollow cavity 81 are connected to the guide channel 6 to ensure the heat dissipation effect of the gap between the high and low voltage windings 3.

[0028] In addition, the closed housing 1 adopts a detachable structure, specifically including a main housing 11, with recessed mounting surfaces 12 disposed on both sides of the main housing 11, the heat dissipation mechanism 9 is fixed on the mounting surfaces 12 to cool the side walls thereof, a closed cover 13 is disposed on the upper end of the main housing 11, and a closed base 14 is disposed on the lower end of the main housing 11. After the closed base 14 is fixed, the internal components and the external main housing 11 are assembled one by one.

[0029] At the same time, the closed base 14 is provided with a flow guide cavity 15 corresponding to each iron core 2 and high and low voltage windings 3, and the flow guide cavity 15 is provided with flow guide plates 16 arranged symmetrically relative to the center of the flow guide cavity 15, the flow guide plates 16 are bent and a spiral flow guide gap 17 is left between adjacent flow guide plates 16, and the closed base 14 is provided with a flow guide hole 18 connected to the flow guide gap 17 on the outer side of the circumference, and the central upper end of the flow guide cavity 15 is relatively connected to the air inlet 42. The external air flows in a spiral manner along the flow guide gap 17, and then enters the flow guide channel 6 through the air inlet 42 at an accelerated speed.

[0030] It can be seen that the closing cover 13 and the closing base 14 are connected to the main housing 11 by screws, and a lifting ring is fixed on the upper end of the closing cover 13. The closing cover 13 is moved to the top of the main housing 11 in a hanging manner, and then its edge is locked and fixed by screws.

[0031] Obviously, the closed housing 1 has a built-in temperature sensor, and a cooling fan 19 is installed at the lower end of the closed cover 13 opposite to the air outlet 44. When the temperature sensor senses that the temperature inside the closed housing 1 is too high, the cooling fan 19 starts to actively dissipate heat.

[0032] Preferably, an operation port 191 is opened on the side of the closed housing 1 , and the operation port 191 is closed by a hinged opening and closing door 192 . The maintenance personnel can maintain and adjust the internal high and low voltage windings 3 by opening the operation port 191 .

[0033] To sum up, the principle of this embodiment is that: an insulating rib plate 5 arranged circumferentially along the high and low voltage windings 3 is provided inside the closed shell 1 to support the isolation frame 4, and a guide channel 6 is left between the insulating rib plate 5 and the isolation frame 4 to guide the air to flow evenly, and cooperate with the hollow mechanism 8 to effectively reduce the internal winding heat dissipation dead corner.

[0034] 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.

[0035] Although the following terms are used more frequently in this article, such as closed shell 1, main shell 11, mounting surface 12, closed cover 13, closed base 14, flow guide cavity 15, flow guide plate 16, flow guide gap 17, flow guide hole 18, cooling fan 19, operation port 191, opening and closing door 192, iron core 2, high and low voltage winding 3, isolation frame 4, isolation beam 41, isolation foot 42, isolation net 43, air outlet 44, isolation cover 45, insulating rib plate 5, flow guide channel 6, fixing plate 7, hollow mechanism 8, hollow cavity 81, hollow groove 82, heat dissipation mechanism 9, heat dissipation plate 91, heat dissipation rib 92, heat conductive layer 93, etc., the possibility of using other terms is not excluded. These terms are used 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 first-level energy efficiency 10 kV dry-type transformer, comprising a closed housing (1), wherein the closed housing (1) has an internal iron core (2) and high and low voltage windings (3), characterized in that: An isolation frame (4) is left between the closed housing (1) and the high and low voltage windings (3); the isolation frame (4) is connected to an insulating rib plate (5); a flow guide channel (6) is left between the insulating rib plates (5); a fixing plate (7) is built into the high and low voltage windings (3); a hollow mechanism (8) is provided on the fixing plate (7); the flow guide channel (6) is connected to the hollow mechanism (8); and a heat dissipation mechanism (9) is provided on the side of the closed housing (1).

2. A first-level energy efficiency 10kV dry-type transformer according to claim 1, characterized in that: The isolation frame (4) comprises isolation beams (41) respectively arranged at the upper and lower ends of the high and low voltage windings (3); the isolation beam (41) has an I-shaped cross section; and the isolation beam (41) has isolation feet (42) in contact with the upper and lower ends of the closed housing (1).

3. A first-level energy efficiency 10kV dry-type transformer according to claim 2, characterized in that: The insulating rib plate (5) is connected to the isolation beam (41) and is attached to the outside of the high and low voltage windings (3) in the vertical direction. The insulating rib plate (5) has a T-shaped cross section. The guide channel (6) is located between the two sides of the isolation beam (41) and the insulating rib plate (5). The lower end of the closed shell (1) is provided with an air inlet, and an isolation net (43) is provided at the air inlet. The upper end of the closed shell (1) is provided with an air outlet (44) and an isolation cover (45) covering the air outlet (44).

4. A first-level energy efficiency 10kV dry-type transformer according to claim 3, characterized in that: The heat dissipation mechanism (9) comprises a heat dissipation plate (91) covering the outside of the closed shell (1), heat dissipation ribs (92) are arranged on the surface of the heat dissipation plate (91), and a heat conductive layer (93) is left between the heat dissipation plate (91) and the closed shell (1).

5. A first-level energy efficiency 10kV dry-type transformer according to claim 3, characterized in that: The fixing plate (7) is vertically fixed between the high and low voltage windings (3) by means of resin glue, the hollow mechanism (8) comprises a hollow cavity (81) arranged in the fixing plate (7), a hollow groove (82) communicating with the hollow cavity (81) is formed on the surface of the fixing plate (7), and the upper and lower ends of the hollow cavity (81) are communicated with the guide channel (6).

6. A first-level energy efficiency 10kV dry-type transformer according to claim 3, characterized in that: The closed housing (1) comprises a main housing (11), and recessed mounting surfaces (12) are provided on the outside of both sides of the main housing (11). The heat dissipation mechanism (9) is fixed on the mounting surfaces (12). A closed cover (13) is provided at the upper end of the main housing (11), and a closed base (14) is provided at the lower end of the main housing (11).

7. A first-level energy efficiency 10kV dry-type transformer according to claim 6, characterized in that: The closed base (14) is provided with flow guide cavities (15) corresponding to the respective iron cores (2) and the high and low voltage windings (3) one by one. The flow guide cavities (15) are provided with flow guide plates (16) arranged symmetrically with respect to the center of the flow guide cavities (15). The flow guide plates (16) are arranged in a curved manner and spiral flow guide gaps (17) are left between adjacent flow guide plates (16). The closed base (14) is provided with flow guide holes (18) in communication with the flow guide gaps (17) on the circumferential outer side. The central upper end of the flow guide cavity (15) is in communication with the air inlet.

8. A first-level energy efficiency 10kV dry-type transformer according to claim 6, characterized in that: The closing cover (13) and the closing base (14) are respectively connected to the main housing (11) via threaded parts, and a lifting ring is fixed to the upper end of the closing cover (13).

9. A first-level energy efficiency 10kV dry-type transformer according to claim 6, characterized in that: The closed housing (1) has a built-in temperature sensor, and a cooling fan (19) is installed at the lower end of the closed cover (13) opposite to the air outlet (44).

10. A first-level energy efficiency 10kV dry-type transformer according to claim 1, characterized in that: An operating opening (191) is provided on the side of the closed housing (1), and the operating opening (191) is closed by a hinged opening and closing door (192).

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