Voltage transformer with good heat dissipation effect

Abstract

The utility model discloses a voltage transformer with a good heat dissipation effect. The voltage transformer with the good heat dissipation effect comprises a shell, a heat conduction plate is arranged in the shell, the heat conduction plate is provided with a coil winding, and the heat conduction plate is provided with a pressing plate, abuts against an iron core of the coil winding and is used for tightly pressing the iron core of the coil winding on the heat conduction plate. A heat conduction plate is arranged in the shell, a plurality of heat dissipation fins are arranged on the two sides of the heat conduction plate, a plurality of ventilation holes are formed in the bottom in the shell and located below the heat dissipation fins, air outlet holes are formed in the two sides of the shell, and heat dissipation fans are arranged in the air outlet holes. Temperature generated by the coil winding is conducted to the heat dissipation fins through the heat conduction plate, along with operation of the heat dissipation fan, external air is sucked to pass through the ventilation holes and exchange heat with the heat dissipation fins, hot air in the shell is guided through the first drainage part and the second drainage part to be discharged out of the air outlet holes orderly and rapidly, and the product has the advantage of being good in heat dissipation effect.

Description

Technical Field

[0001] The utility model relates to the technical field of mutual inductors, in particular to a voltage mutual inductor with good heat dissipation effect. Background Art

[0002] Voltage transformers (PTs) are similar to transformers in that they are used to transform voltage on a line. However, transformers transform voltage to transmit electrical energy, so their capacity is large and is generally measured in kilovolt-amperes or megavolt-amperes. Voltage transformers transform voltage primarily to power measuring instruments and relay protection devices, to measure line voltage, power, and energy, or to protect valuable equipment, motors, and transformers in the event of a line fault.

[0003] Existing voltage transformers are typically cast using epoxy resin, which causes the heat in the winding coils to continuously accumulate and rise. The winding resistance and magnetic circuit saturation level will change with temperature, affecting measurement accuracy. Therefore, the applicant has made a beneficial design and found a solution to the above-mentioned problem. The technical solution to be introduced below was produced in this context. Summary of the Invention

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned traditional voltage transformer design and provide a product with good heat dissipation effect.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions.

[0006] A voltage transformer with good heat dissipation effect includes a shell, a heat conduction plate is provided in the shell, a coil winding is provided on the heat conduction plate, a pressing plate is provided on the heat conduction plate, and the pressing plate abuts the iron core of the coil winding, which is used to press the iron core of the coil winding against the heat conduction plate; a plurality of heat dissipation fins are provided on both sides of the heat conduction plate, a plurality of ventilation holes are provided on the bottom of the shell and are located below the heat dissipation fins, air outlet holes are provided on both sides of the shell, a cooling fan is provided on the air outlet holes, an inclined first drainage portion is provided below the air outlet holes, and an inclined second drainage portion is provided at the air inlet of the air outlet holes.

[0007] Preferably, a cavity is provided in the shell, and a detachable bottom plate is provided at the entrance of the cavity.

[0008] Preferably, at least two mounting brackets are provided at one end of the bottom plate, a raised portion is provided at the other end of the bottom plate, the ventilation holes are provided on both sides of the raised portion, and a sealing strip is provided between the bottom plate and the side wall of the cavity.

[0009] Preferably, the heat conducting plate is mounted and fixed on the raised portion, and the heat conducting plate is provided with a sink for accommodating the coil winding, and silicone grease is applied between the sink and the iron core of the coil winding.

[0010] Preferably, a rain baffle is arranged above the outlet of the air outlet hole.

[0011] Beneficial effects:

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The utility model discloses, coil winding produces temperature through heat conduction plate conduction to radiating fin, along with radiating fan operation, the air of outside is sucked through ventilation hole, and carries out heat exchange with radiating fin, and hot air flows to the air inlet of air outlet hole through first guide part, and the hot air in the shell is guided and is discharged from the air outlet hole through second guide part, prevents the heat accumulation in the shell, and effectively reduces the temperature of coil winding, thereby overcoming the technical problem of the background art, and the product has the advantage that the heat dissipation effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure diagram of a voltage transformer with good heat dissipation effect of the utility model;

[0015] Figure 2 It is the side cross section structure diagram of a voltage transformer with good heat dissipation effect of the utility model;

[0016] Figure 3 It is the structure diagram of heat conduction plate of a voltage transformer with good heat dissipation effect of the utility model;

[0017] Figure 4 It is the structure diagram of bottom plate of a voltage transformer with good heat dissipation effect of the utility model;

[0018] The corresponding relationship between the various figure marks and component names in the drawings is as follows:

[0019] Mark: 1, shell;2, heat conduction plate;3, coil winding;4, compression plate;5, bottom plate;6, mounting frame;7, radiating fan;11, recess;12, air outlet hole;13, first guide part;14, second guide part;15, rain baffle;21, radiating fin;22, sink;51, ventilation hole;52, elevated part;53, sealing strip. DETAILED DESCRIPTION

[0020] The technical scheme of the utility model will be described clearly and completely in connection with embodiments, and obviously, the described embodiments are a part of embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0021] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0022] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0023] Reference example Figures 1 to 4 A voltage transformer with good heat dissipation effect includes a housing 1, a heat conducting plate 2 is provided in the housing 1, the heat conducting plate 2 is provided with a coil winding 3, the heat conducting plate 2 is provided with a pressing plate 4, and abuts against the iron core of the coil winding 3, for pressing the iron core of the coil winding 3 against the heat conducting plate 2; a plurality of heat dissipation fins 21 are provided on both sides of the heat conducting plate 2, a plurality of ventilation holes 51 are provided on the bottom of the housing 1 and are located below the heat dissipation fins 21, air outlet holes 12 are provided on both sides of the housing 1, a heat dissipation fan 7 is provided in the air outlet holes 12, an inclined first air guide portion 13 is provided below the air outlet holes 12, and an inclined second air guide portion 14 is provided at the air inlet of the air outlet holes 12;

[0024] It is worth mentioning that a cavity 11 is provided in the housing 1, and a detachable bottom plate 5 is provided at the entrance of the cavity 11. The cavity 11 not only accommodates the coil winding 3 and the heat conducting plate 2, but also provides a good environment for air convection. The detachable bottom plate 5 facilitates the installation of the coil winding 3 and the heat conducting plate 2.

[0025] It is worth mentioning that at least two mounting brackets 6 are provided at one end of the bottom plate 5, and a raised portion 52 is provided at the other end of the bottom plate 5. Ventilation holes 51 are provided on both sides of the raised portion 52. A sealing strip 53 is provided between the bottom plate 5 and the side wall of the cavity 11. The mounting brackets 6 not only facilitate the connection and fixation of the housing 1 to the fixed object, but also increase the distance between the ventilation holes 51 and the ground, facilitating the entry of cold air into the cavity 11 through the ventilation holes 51. The raised portion 52 increases the distance between the heat dissipation fins 21 and the ventilation holes 51, preventing the heat conducting plate 2 from blocking the ventilation holes 51. The sealing strip 53 increases the sealing between the bottom plate 5 and the cavity 11, preventing rainwater from entering the cavity 11.

[0026] It is worth mentioning that the heat conducting plate 2 is fixed to the raised portion 52. The heat conducting plate 2 is provided with a sink 22 for accommodating the coil winding 3. Silicone grease is applied between the sink 22 and the iron core of the coil winding 3. The sink 22 provides a fool-proof design for the quick installation of the coil winding 3. The iron core of the coil winding 3 is pressed tightly into the sink 22 by the pressing plate 4, and the gap between the iron core and the sink 22 is reduced by silicone grease, thereby improving the heat conduction efficiency.

[0027] It is worth mentioning that a rain shield 15 is provided above the outlet of the air outlet 12 to prevent rainwater from entering the cavity 11 along the air outlet 12, thereby ensuring the normal operation of the cooling fan 7.

[0028] The operating principle of the present invention is now described as follows:

[0029] When the coil winding 3 is running, the temperature generated is transferred to the heat dissipation fins 21 through the heat conduction plate 2. As the heat dissipation fan 7 runs, the external air is drawn through the ventilation holes 51. The cold air passes through the heat dissipation fins 21 to exchange heat with it. The hot air after the heat exchange is guided to the air inlet of the air outlet 12 through the first guide portion 13. The second guide portion 14 quickly guides the hot air above the concave cavity 11 to be discharged from the air outlet 12, thereby preventing heat accumulation in the housing 1 and effectively reducing the temperature of the coil winding 3.

[0030] The above design solution can enable the product to achieve the advantage of good heat dissipation effect.

[0031] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. A voltage transformer with good heat dissipation effect, comprising a housing (1), characterized in that: A heat conducting plate (2) is provided in the shell (1), the heat conducting plate (2) is provided with a coil winding (3), the heat conducting plate (2) is provided with a pressing plate (4), and abuts against the iron core of the coil winding (3) for pressing the iron core of the coil winding (3) against the heat conducting plate (2); a plurality of heat dissipation fins (21) are provided on both sides of the heat conducting plate (2), a plurality of ventilation holes (51) are provided on the bottom of the shell (1) and are located below the heat dissipation fins (21), air outlet holes (12) are provided on both sides of the shell (1), a heat dissipation fan (7) is provided on the air outlet holes (12), an inclined first air guide portion (13) is provided below the air outlet holes (12), and an inclined second air guide portion (14) is provided at the air inlet of the air outlet holes (12).

2. The voltage transformer with good heat dissipation effect according to claim 1, characterized in that: A concave cavity (11) is provided in the housing (1), and a detachable bottom plate (5) is provided at the entrance of the concave cavity (11).

3. The voltage transformer with good heat dissipation effect according to claim 2, characterized in that: At least two mounting brackets (6) are provided at one end of the bottom plate (5), a raised portion (52) is provided at the other end of the bottom plate (5), the ventilation holes (51) are arranged on both sides of the raised portion (52), and a sealing strip (53) is provided between the bottom plate (5) and the side wall of the cavity (11).

4. The voltage transformer with good heat dissipation effect according to claim 1, characterized in that: The heat conducting plate (2) is mounted and fixed on the raised portion (52), and the heat conducting plate (2) is provided with a sink (22) for accommodating the coil winding (3), and silicone grease is applied between the sink (22) and the iron core of the coil winding (3).

5. The voltage transformer with good heat dissipation effect according to claim 1, characterized in that: A rain shield (15) is provided above the outlet of the air outlet (12).

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