Multi-stage heat dissipation and electromagnetic shielding integrated three-phase transformer

Abstract

The utility model relates to the technical field of three-phase transformers, and discloses a multistage heat dissipation and electromagnetic shielding integrated three-phase transformer which comprises a transformer box body, a bearing integrated device and an air gathering opening, the transformer box body comprises an outer box body, a ventilation plate and an electromagnetic shielding layer, and the bottom face of the outer box body is detachably connected with the top face of the bearing integrated device. The electromagnetic shielding layer is attached to the inner side face of the ventilation plate, the ventilation plate and the electromagnetic shielding layer are inserted into the side wall of the outer box body, the air gathering opening is connected with the outer side face of the ventilation plate, and multiple long-strip-shaped holes are formed in the side face of the ventilation plate. The ventilation plate and the air gathering opening are arranged, the air circulation area is increased through the long-strip-shaped holes in the ventilation plate, the air gathering opening can gather air in different directions and guide the air into the long-strip-shaped holes in the ventilation plate, and therefore the heat dissipation efficiency of the transformer is improved, dual-system cooling is achieved in combination with a cooling oil pipe network of an existing transformer, and the service life of the transformer is prolonged. The temperature in the transformer is effectively reduced, and the service life of the transformer is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to three -phase transformer technical field, concretely is a multistage heat dissipation and electromagnetic shielding integrated three -phase transformer. BACKGROUND

[0002] In the power system, three -phase transformer is the vital equipment, it bears voltage transformation, electric energy transmission and distribution etc. key task. Along with the continuous growth of power demand and the development of power equipment to high power, high density, the heat and electromagnetic interference problem produced in the working process of three -phase transformer is increasingly prominent.

[0003] The traditional three -phase transformer heat dissipation mode is single, usually only relies on natural heat dissipation or simple air cooling heat dissipation. Natural heat dissipation efficiency is low, when the transformer high load operation, heat can not be promptly dissipated, will lead to the internal temperature of transformer sharp increase, accelerates the aging of insulating material, reduces the service life of transformer, and possibly even cause safety accidents. And simple air cooling heat dissipation although has improved the heat dissipation efficiency to some extent, but due to the limitation of heat dissipation structure design, cannot be flexibly adjusted according to the actual working state and heat dissipation demand of transformer, and the heat dissipation effect is still not satisfactory.

[0004] Meanwhile, electromagnetic interference is also a serious problem faced by three -phase transformer. In the operation process of transformer, the electromagnetic field in its interior will produce electromagnetic radiation, causes the interference to surrounding electronic equipment, influences its normal work. Especially in some occasions that the electromagnetic environment requirement is higher, such as hospital, communication base station etc., electromagnetic interference can bring serious consequences. The existing electromagnetic shielding measures are often not perfect, cannot effectively suppress the electromagnetic radiation produced by transformer, and is difficult to meet the demand of actual application.

[0005] In addition, the traditional three -phase transformer also has many inconveniences in installation and maintenance. Its structure is usually more complex, the connection between parts is not flexible enough, needs to consume a lot of manpower and time in the installation process, and the installation precision is difficult to guarantee. When maintaining, due to the low integration degree of heat dissipation and electromagnetic shielding structure and transformer main body, needs to individually dismount and check multiple parts, increases the difficulty and cost of maintenance.

[0006] In order to solve the above problems, we propose a multistage heat dissipation and electromagnetic shielding integrated three -phase transformer. INVENTION CONTENTS

[0007] The utility model aims at providing a multistage heat dissipation and electromagnetic shielding integrated three -phase transformer to solve the problems raised in the above background technology.

[0008] To achieve the above object, the utility model provides the following technical scheme: a multistage heat dissipation and electromagnetic shielding integrated three -phase transformer, including transformer box, support integrated device and gather air -outlet,

[0009] The transformer box includes an outer box, a gas-permeable plate, and an electromagnetic shielding layer; the bottom surface of the outer box is detachably connected to the top surface of the support integrated device; the electromagnetic shielding layer is attached to the inner side surface of the gas-permeable plate; the gas-permeable plate and the electromagnetic shielding layer are both inserted into the side wall of the outer box; the gather air-outlet is connected to the outer side surface of the gas-permeable plate; a plurality of long holes are formed in the side surface of the gas-permeable plate.

[0010] Preferably, the support integrated device includes a support tray, an extension plate, and a limiting plate.

[0011] The top surface of the support tray is connected to the bottom surface of the transformer box; the support tray includes two side plates, a back plate, and a bottom plate; the two opposite side surfaces of the bottom plate are respectively connected to one of the side plates; the bottom plate and the adjacent side surface provided with the side plate are connected to the back plate; the bottom plate is provided with an inner cavity; the opposite side surface of the bottom plate connected to the back plate is provided with an opening; the inner cavity of the bottom plate is in communication with the opening; the inner cavity of the bottom plate is slidably connected to the extension plate; the top surface of the extension plate is slidably connected to the limiting plate.

[0012] Preferably, the support integrated device further includes an auxiliary mounting rack; the auxiliary mounting rack is connected to the outer side surface of the back plate.

[0013] Preferably, the top surface of the extension plate is provided with a mounting groove; the bottom surface of the limiting plate is connected to the bottom surface of the mounting groove of the extension plate through an elastic member; the extension plate is connected to the side surface of the inner cavity of the bottom plate through an elastic member.

[0014] Preferably, the gather air-outlet includes a flange and a gather air-groove; one end of the gather air-groove is connected to the outer side surface of the gas-permeable plate; the other end of the gather air-groove is fixedly connected to the flange.

[0015] Preferably, the circumferential outer side surface of the flange is provided with threads; a wind guide nozzle is connected to the circumferential outer side surface of the flange through threads.

[0016] Compared with the prior art, the utility model has the advantages of:

[0017] Efficient heat dissipation: the utility model discloses a gas-permeable plate and a gather air-outlet; the long holes on the gas-permeable plate increase the air circulation area; the gather air-outlet can gather and guide the wind from different directions into the long holes of the gas-permeable plate, thereby improving the heat dissipation efficiency of the transformer; in combination with the cooling oil pipe network of the existing transformer, double-system cooling is realized, the temperature inside the transformer is effectively reduced, and the service life of the transformer is prolonged.

[0018] High structural integration: the utility model discloses the transformer, the support integrated device and the mouth of wind integration are integrated together, and each component is combined through reasonable connecting mode, improves the integration of structure, reduces the installation space, and facilitates installation and maintenance.

[0019] Convenient installation: through the design of telescopic plate and limiting plate, the quick installation and limiting of the air permeable plate are realized, the installation process is simple and convenient, and the installation time and labor cost are saved. DETAILED DESCRIPTION

[0020] Figure 1 It is the structural schematic diagram of the utility model;

[0021] Figure 2 It is the structural schematic diagram of the utility model without installing the air guide nozzle;

[0022] Figure 3 It is the structural schematic diagram of the transformer in the utility model;

[0023] Figure 4 It is the structural schematic diagram of the support integrated device in the utility model;

[0024] Figure 5 It is the structural partial section view of the support integrated device in the utility model.

[0025] In the drawing: 1-transformer box body, 11-outer box body, 12-air permeable plate, 13-electromagnetic shielding layer, 2-support integrated device, 21-support tray, 211-side plate, 212-back plate, 213-bottom plate, 22-telescopic plate, 23-limiting plate, 24-assistant mounting frame, 3-mouth of wind, 31-flange, 32-mouth of wind groove, 4-air guide nozzle. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0027] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5The utility model provides a technical scheme: a multistage heat dissipation and electromagnetic shielding integrated three -phase transformer, including transformer box 1, support integrated device 2 and gather wind gap 3, the transformer box 1 includes outer box 11, air -permeable board 12 and electromagnetic shield layer 13. The outer box 11 adopts high -strength, corrosion -resistant metal material and is made, such as Q235-A steel, the outer box 11 side near the bottom is detachably connected through bolt support integrated device 2, the installation and disassembly of transformer box 1 are convenient. The electromagnetic shield layer 13 selects cutoff waveguide window, adopts hexagonal honeycomb structure, blocks high -frequency electromagnetic wave (>1GHz) through the cutoff characteristic of waveguide, allows air to pass simultaneously, and the thickness is 0.1mm~0.2mm, tightly fits the air -permeable board 12 inboard, can effectively shield the electromagnetic field generated in transformer, prevents the influence of electromagnetic interference to surrounding equipment.

[0028] The air -permeable board 12 and the electromagnetic shield layer 13 are inserted into the outer box 11 side wall, and a plurality of long holes are formed in the side of the air -permeable board 12, the size of the long hole is 10mm~20mm long, 2mm~5mm wide, and the long holes can increase the air circulation area and improve the heat dissipation efficiency.

[0029] The conventional three -phase transformer also includes a core (magnetic circuit part), a winding (circuit part), an oil tank and a cooling system, an oil storage tank (oil pillow), a gas relay (gas relay), a thermometer and a tapping switch.

[0030] The core functions to form a magnetic circuit for electromagnetic induction, concentrate and guide magnetic flux, and the core is usually three-column type, each column corresponding to a phase winding, and the three-phase magnetic circuits are independent of each other.

[0031] The winding (circuit part) functions to realize voltage conversion and power transmission.

[0032] Oil-immersed transformer: insulating oil is used as a cooling medium and is filled around the winding and the core.

[0033] Oil tank and cooling system

[0034] Oil tank: holds transformer oil and core components, usually made of steel plate welding structure.

[0035] Forced oil circulation cooling (OFWF / ODAF): forced oil circulation through an oil pump, combined with a radiator or cooler, suitable for large capacity transformers.

[0036] Oil storage tank (oil pillow): adjust the oil level, prevent oil oxidation and moisture.

[0037] Gas relay (gas relay): detect internal faults and protect the safety of the transformer.

[0038] Thermometer: monitor the oil temperature or winding temperature.

[0039] Tap changer: Adjusts the number of winding turns to regulate the output voltage.

[0040] The three-phase transformer applicable to this application is a conventional three-phase transformer, and the specific internal connections and circuits will not be described in detail.

[0041] The air inlet 3 is welded to the outer side of the vent plate 12 and is used to guide air into the elongated hole of the vent plate 12.

[0042] The integrated support device 2 includes a support tray 21, a telescopic plate 22, a limiting plate 23, and an auxiliary mounting frame 24. The support tray 21 is made of aluminum alloy, which is lightweight and has high strength. The support tray 21 is bolted to the outer side of the transformer housing 1, serving to support the transformer.

[0043] The pallet 21 includes two side plates 211, a back plate 212, and a bottom plate 213. The bottom plate 213 has one side plate 211 welded to each of its two opposite sides, and the bottom plate 213 is welded to the back plate 212 on the adjacent side where the side plates 211 are located. The bottom plate 213 has an inner cavity, the size of which is designed according to actual needs. Openings are formed on the opposite side of the bottom plate 213 and the side connecting to the back plate 212, and the inner cavity of the bottom plate 213 communicates with these openings. The telescopic plate 22 is slidably connected to the inner cavity of the bottom plate 213.

[0044] The top surface of the telescopic plate 22 is slidably connected to the limiting plate 23, which is made of metal, such as stainless steel. The auxiliary mounting bracket 24 is bolted to the outer side of the back plate 212 and is used to assist in the installation of the transformer.

[0045] The top surface of the telescopic plate 22 has an installation groove, and the bottom surface of the limiting plate 23 is connected to the bottom surface of the installation groove of the telescopic plate 22 via an elastic element. The elastic element is a spring, and the spring constant is selected according to actual needs, such as 50N / mm~100N / mm. The telescopic plate 22 is connected to the inner side of the base plate 213 via an elastic element, which is also a spring.

[0046] The air-gathering vent 3 includes a flange 31 and an air-gathering groove 32. One end of the air-gathering groove 32 is welded to the outer side of the vent plate 12, and the other end of the air-gathering groove 32 is fixedly connected to the flange 31. The outer circumference of the flange 31 is threaded, and an air guide nozzle 4 is threadedly connected to the outer circumference of the flange 31. The air guide nozzle 4 is made of plastic material, such as polyethylene, which can further gather air from different directions and guide the air from the air-gathering groove 32 into the elongated hole of the vent plate 12, thereby completing the air cooling of the entire interior of the transformer housing 1.

[0047] The air guide nozzle 4 can be horn-shaped to further improve the air gathering effect.

[0048] Working principle:

[0049] The breathable plate 12 is tightly attached to the electromagnetic shielding layer 13. The operator pushes the telescopic plate 22 into the inner cavity of the bottom plate 213 and presses the limiting plate 23 downward on the bottom surface of the outer box 11 so that the breathable plate 12 is inserted into the outer box 11.

[0050] After the breathable plate 12 is inserted, the operator releases the restriction on the telescopic plate 22. The restoring force of the elastic element in the inner cavity of the bottom plate 213 pushes the telescopic plate 22, and the limiting plate 23 also disengages from the restriction of the bottom surface of the outer casing 11. The restoring force of the elastic element in the mounting groove of the telescopic plate 22 pushes the limiting plate 23, and the limiting plate 23 pops out from the mounting groove of the telescopic plate 22, thereby achieving the limiting function of the breathable plate 12.

[0051] The outer side of the vent plate 12 can also be welded with the air-gathering port 3, and the outer circumferential side of the flange 31 is threadedly connected to the air guide nozzle 4. The air guide nozzle 4 can further gather the air from different directions and let the air enter the elongated hole of the vent plate 12 from the air-gathering groove 32, thereby completing the air cooling of the entire transformer box 1.

[0052] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A three-phase transformer integrating multi-stage heat dissipation and electromagnetic shielding, characterized in that, It includes a transformer housing (1), a supporting integrated device (2), and an air vent (3); The transformer housing (1) includes an outer housing (11), a vent plate (12), and an electromagnetic shielding layer (13); the bottom surface of the outer housing (11) is detachably connected to the top surface of the supporting integrated device (2); the electromagnetic shielding layer (13) is attached to the inner side of the vent plate (12); both the vent plate (12) and the electromagnetic shielding layer (13) are inserted into the side wall of the outer housing (11); the air inlet (3) is connected to the outer side of the vent plate (12); the side of the vent plate (12) has multiple elongated holes.

2. The multi-stage heat dissipation and electromagnetic shielding integrated three-phase transformer according to claim 1, characterized in that, The supporting integrated device (2) includes a support tray (21), a telescopic plate (22), and a limiting plate (23). The top surface of the support tray (21) is connected to the bottom surface of the transformer housing (1); the support tray (21) includes two side plates (211), a back plate (212) and a bottom plate (213); the two opposite sides of the bottom plate (213) are respectively connected to one of the side plates (211); the bottom plate (213) and the adjacent side with the side plate (211) are connected to the back plate (212); the bottom plate (213) has an inner cavity; the bottom plate (213) and the opposite side connected to the back plate (212) have openings; the inner cavity of the bottom plate (213) communicates with the openings; the inner cavity of the bottom plate (213) is slidably connected to the telescopic plate (22); the top surface of the telescopic plate (22) is slidably connected to the limiting plate (23).

3. The multi-stage heat dissipation and electromagnetic shielding integrated three-phase transformer according to claim 2, characterized in that, The supporting integration device (2) also includes an auxiliary mounting bracket (24); the auxiliary mounting bracket (24) is connected to the outer side of the back plate (212).

4. The multi-stage heat dissipation and electromagnetic shielding integrated three-phase transformer according to claim 2, characterized in that, The top surface of the telescopic plate (22) is provided with an installation groove; the bottom surface of the limiting plate (23) is connected to the bottom surface of the installation groove of the telescopic plate (22) through an elastic element; the telescopic plate (22) is connected to the inner side of the base plate (213) through an elastic element.

5. The multi-stage heat dissipation and electromagnetic shielding integrated three-phase transformer according to claim 1, characterized in that, The air inlet (3) includes a flange (31) and an air inlet (32); one end of the air inlet (32) is connected to the outer side of the vent plate (12); the other end of the air inlet (32) is fixedly connected to the flange (31).

6. A multi-stage heat dissipation and electromagnetic shielding integrated three-phase transformer according to claim 5, characterized in that, The outer circumference of the flange (31) is provided with threads; the outer circumference of the flange (31) is threaded with a guide nozzle (4).

Images