A highly sealed micro transformer

Abstract

The present application discloses a highly sealed micro-transformer in the field of transformer technology, comprising a housing, the housing being provided with heat dissipation holes and a bracket, the bracket being fixedly connected to a transformer body, a motor, and a support shaft, the bottom of the housing being provided with an air vent, the housing being rotatably connected to a sealing disk, the sealing disk being provided with a connection hole, and the sealing disk being fixedly provided with a gear ring; the housing being provided with a retaining groove surrounding the heat dissipation holes and having an open top, the retaining groove being provided with a vent facing the transformer body and the heat dissipation holes, the retaining groove being hinged with a sealing plate for sealing the vent; the support shaft being vertically slidably connected to a sleeve, the sleeve being fixedly connected to a push rod respectively abutting the bottom of each sealing plate, the movable end of the motor being fixedly sleeved with a drive gear and a cam, the drive gear being meshed with the gear ring. In addition to heat dissipation through the heat dissipation holes, the air vents can also dissipate heat in this solution, thereby ensuring a good heat dissipation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of micro transformers, and in particular to a highly sealed micro transformer. Background Art

[0002] Microtransformers primarily refer to single-phase transformers below 20kV / A and three-phase transformers below 50kV / A. Compared to traditional transformers, they are smaller, less expensive, and require fewer wires. Microtransformers generally have lower load and utilization rates, and the inductive loads they carry are generally not capacitively compensated. As precision devices, microtransformers are commonly used in factory electrical control systems. With the widespread use of electronic components in power plant control, monitoring, and automation circuits, their application is becoming increasingly widespread.

[0003] For example, a micro transformer with water-proof function with publication number CN211670065U includes a box body, a placement plate is fixedly provided at the bottom of the inner cavity of the box body, a connecting seat is fixedly provided on the upper surface of the placement plate, there are two connecting seats, and a second slot is provided on the upper surface of the two connecting seats.

[0004] The aforementioned patent utilizes a housing, baffles, and blocks. On rainy days, the baffles prevent rainwater from entering the housing through the top, while the blocks prevent rainwater from entering the housing through the heat dissipation holes. However, on sunny days, the blocks block the heat dissipation holes, preventing convection between the micro-transformer and outside air. Heat generated by the micro-transformer cannot be quickly dissipated through the heat dissipation holes, causing the micro-transformer to heat up and affect performance. Summary of the Invention

[0005] The present invention aims to provide a highly sealed micro transformer to solve the problem in the prior art that a block blocks the heat dissipation hole, causing the heat generated by the micro transformer to be unable to be quickly dissipated through the heat dissipation hole.

[0006] In order to solve the above problems, the present invention provides the following technical solutions: a highly sealed micro-transformer, comprising a shell, the shell being provided with a heat dissipation hole and a bracket, the bracket being fixedly connected to a transformer main body, a motor and a support shaft, the bottom of the shell being provided with an air vent, the bottom of the shell being also rotatably connected to a sealing disk that seals the air vent, the sealing disk being provided with connecting holes staggered with the air vent, and the sealing disk being also fixedly provided with a gear ring; the shell being provided with a retaining groove surrounding the heat dissipation hole and open at the top, the retaining groove being provided with a ventilation opening facing the transformer main body and the heat dissipation hole, the retaining groove being hinged with a sealing plate for sealing the ventilation opening, and the number of the heat dissipation holes being multiple; the support shaft being vertically slidably connected with a sleeve, the sleeve being fixedly connected with a push rod that respectively abuts the bottom of each sealing plate, the movable end of the motor being fixedly sleeved with a driving gear and a cam abutting the bottom of the sleeve, the bracket being provided with a through opening, and the bottom of the driving gear passing through the through opening engages with the gear ring.

[0007] The working principle and beneficial effects of the present invention are as follows: In this solution, when it is sunny and there is no rain, the sealing disk seals the air vents at the bottom of the outer shell, the sealing plate does not seal the vents, the vents are directly opposite the transformer body and the heat dissipation holes, and the air from the external environment passes through the heat dissipation holes and the vents and blows directly to the transformer body, thereby bringing the heat generated by the transformer body out through the heat dissipation holes.

[0008] In order to prevent rainwater from entering the outer shell on rainy days, the sealing plate and the retaining groove are hinged, the bracket is fixedly connected to the motor and the support shaft, the support shaft is vertically slidably connected to the sleeve, the sleeve is fixedly connected to a push rod respectively abutting the bottom of each sealing plate, and the movable end of the motor is fixedly sleeved with a cam abutting the bottom of the sleeve. The cam and the driving gear are driven by the motor to rotate, the cam pushes the sleeve upward, and the sleeve drives multiple push rods to move upward, and the push rod pushes the sealing plate upward to rotate toward the vent, so that the sealing plate seals the vent, and the sealing plate prevents external rainwater from entering the outer shell. At the same time, the driving gear drives the sealing disk to rotate through the ring gear, so that the connecting hole on the sealing disk and the ventilation hole at the bottom of the outer shell are aligned and connected.

[0009] However, since the vents are blocked by the sealing plate at this time, the outside air cannot form air convection with the transformer body. In addition to the heat dissipation through the heat dissipation holes, the connection holes and the ventilation holes are aligned and connected to form auxiliary heat dissipation. At this time, the sealing plate also plays a role in guiding the wind. Since rainy days are usually accompanied by strong winds, the wind is blocked by the sealing plate. At this time, the outside wind with a certain wind speed blows into the casing through the heat dissipation holes and the opening at the top of the retaining groove. The wind is again blocked by the top of the casing and blows toward the transformer body at the bottom of the casing. The wind blows the heat generated by the operation of the transformer body out through the connection holes and the ventilation holes.

[0010] Beneficial effects of the present invention: 1. This solution can control the conduction of the vents by setting a movable sealing plate, which can not only meet the needs of blocking the vents to prevent rainwater from entering on rainy days, but also open the vents on sunny days to form air convection between the outside air and the transformer body, thereby improving the heat dissipation effect. 2. When the vents are blocked by the sealing plate on rainy days, the air vents and the connecting holes are aligned. In addition to being dissipated through the heat dissipation holes, heat can also be dissipated through the air vents and the connecting holes. At this time, the sealing plate also plays the role of wind direction guidance, so that the wind blown in from the outside is guided by the sealing plate and blows to the top of the shell, and the wind blows to the bottom of the shell, bringing the heat out through the air vents and the connecting holes, thereby ensuring a good heat dissipation effect.

[0011] Furthermore, the sealing plate is tilted after sealing the vent, and the angle between the sealing plate and the bottom of the retaining groove is obtuse. This angle allows rainwater that falls into the retaining groove to be diverted toward the heat dissipation holes by the obtusely tilted sealing plate. Furthermore, wind blowing in from the outside through the heat dissipation holes is blocked by the sealing plate and redirected toward the top of the housing.

[0012] Furthermore, the number of the ventilation holes is multiple and the multiple ventilation holes are evenly spaced along the circumferential direction. The multiple ventilation holes can increase the heat dissipation rate and enhance the heat dissipation effect.

[0013] Furthermore, the heat dissipation hole is provided with a filter screen, and the surface of the sealing plate is provided with a sealing gasket. The filter screen can filter out debris and dust in the air, and the sealing gasket can enhance the sealing effect.

[0014] Furthermore, a spring is provided between the transformer body and the housing, and the spring can buffer vibrations generated during operation of the transformer body.

[0015] Furthermore, each sealing plate is fixedly connected to a knocking rod for knocking the filter screen in the heat dissipation hole. When rainwater flows through the heat dissipation hole, the rainwater forms a water film on the filter screen, which covers the mesh of the filter screen and prevents air from entering the heat dissipation hole. Therefore, when the sealing plate rotates toward the heat dissipation hole, the sealing plate drives the knocking rod to move, and the knocking rod knocks the filter screen, causing the filter screen to vibrate and shake off the water film. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A vertical cross-sectional view of a high-sealing micro-transformer according to the present invention;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure after the middle sealing plate seals the vent;

[0018] Figure 3 for Figure 1 A partial enlarged schematic diagram. DETAILED DESCRIPTION

[0019] The following is further described in detail through specific implementation methods:

[0020] The figure marks in the drawings of the specification include: connecting hole 1, ventilation hole 2, universal self-locking wheel 3, ring gear 4, bracket 5, shell 6, transformer body 7, sealing plate 8, side plate 9, bottom plate 10, heat dissipation hole 11, push rod 12, sleeve 13, drive gear 14, motor 15, sealing disk 16, support shaft 17, cam 18.

[0021] In the following statements, directional words such as "left", "right", "up", and "down" are all based on the directions in the diagram. In practice, if the corresponding structures are changed in the same direction based on the directions while keeping the relative positions unchanged, it will not affect the implementation of the plan.

[0022] Embodiment: A high-sealing micro transformer, such as Figure 1 As shown, it includes a housing 6, a bracket 5 fixedly provided at the bottom of the housing 6, and a transformer body 7, a support shaft 17, and a motor 15 fixedly connected to the bracket 5. The bottom of the housing 6 is provided with a vent hole, and a sealing disk 16 is rotatably connected to the bottom of the housing 6 to seal the vent hole. The sealing disk 16 has connecting holes 1 arranged in an interlaced manner with the vent hole, and a gear ring 4 is fixedly provided on the top of the sealing disk 16. A heat dissipation hole 11 is provided on the right side of the housing 6. The housing 6 is fixedly provided with a retaining groove surrounding the heat dissipation hole 11 and with an open top. The retaining groove includes a side plate 9, a bottom plate 10, and a vent provided on the left side of the retaining groove. The retaining groove is hingedly connected to a sealing plate 8 for sealing the vent hole. The number of heat dissipation holes 11 is two.

[0023] like Figure 3 As shown, the support shaft 17 is vertically slidably connected to the sleeve 13, the sleeve 13 is fixedly connected to the push rod 12 which abuts the bottom of each sealing plate 8 respectively, the movable end of the motor 15 is fixedly sleeved with the driving gear 14 and the cam 18 abutting the bottom of the sleeve 13, the bracket 5 is provided with a through opening, and the bottom of the driving gear 14 passes through the through opening and engages with the ring gear 4.

[0024] In this solution, when it is sunny and there is no rain, the sealing disk 16 seals the air vents at the bottom of the shell 6, and the sealing plate 8 does not seal the vents. The vents are directly opposite the transformer body 7 and the heat dissipation holes 11. The air from the external environment passes through the heat dissipation holes 11 and the vents and then blows toward the transformer body 7, thereby taking the heat generated by the transformer body 7 out through the heat dissipation holes 11.

[0025] like Figure 2As shown, in order to prevent rainwater from entering the shell 6 on rainy days, since the sealing plate 8 and the retaining groove are hinged, the bracket 5 is fixedly connected to the motor 15 and the support shaft 17, and the support shaft 17 is vertically slidably connected to the sleeve 13, and the sleeve 13 is fixedly connected to the push rod 12 that abuts the bottom of each sealing plate 8 respectively, and the movable end of the motor 15 is fixedly sleeved with a cam 18 that abuts the bottom of the sleeve 13. The cam 18 and the driving gear 14 are driven by the motor 15 to rotate, and the cam 18 pushes the sleeve 13 upward, and the sleeve 13 drives the two push rods 12 to move upward, and the push rod 12 pushes the sealing plate 8 upward to rotate toward the vent, so that the sealing plate 8 seals the vent, and the sealing plate 8 prevents external rainwater from entering the shell 6. At the same time, the driving gear 14 drives the sealing disk 16 to rotate through the ring gear 4, so that the connecting hole 1 on the sealing disk 16 and the ventilation hole 2 at the bottom of the shell 6 are aligned and connected.

[0026] However, since the vent is blocked by the sealing plate 8 at this time, the outside air cannot form air convection with the transformer body 7. In addition to the heat dissipation through the heat dissipation holes 11, the connection holes 1 and the ventilation holes 2 are aligned and connected to form auxiliary heat dissipation. At this time, the sealing plate 8 also plays a role in guiding the wind. Since rainy days are usually accompanied by strong winds, wind with a certain wind speed from the outside is blown into the shell 6 through the heat dissipation holes 11 and the opening at the top of the retaining groove. The wind is blocked by the top of the shell 6 and blown toward the transformer body 7 at the bottom of the shell 6. The wind blows the heat generated by the operation of the transformer body 7 out through the connection holes 1 and the ventilation holes 2.

[0027] It should be noted that those skilled in the art may make numerous variations and improvements without departing from the structure of the present invention, and these variations and improvements should also be considered within the scope of protection of the present invention. These variations and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application shall be based on the content of the claims, and the specific embodiments and other descriptions in the specification may be used to interpret the content of the claims.

Claims

1. A highly sealed micro transformer, comprising a housing, the housing being provided with heat dissipation holes and a bracket, characterized in that: The cam is used to push the sleeve upward, and the sleeve drives the push rod to move upward, and the push rod pushes the sealing plate upward to rotate toward the vent hole. After the sealing plate seals the vent hole, it is inclined, and the angle between the sealing plate and the bottom of the stop groove is obtuse.

2. The highly sealed micro transformer according to claim 1, characterized in that: There are multiple air holes, and the multiple air holes are evenly spaced along the circumferential direction.

3. The highly sealed micro transformer according to claim 2, wherein: The heat dissipation hole is provided with a filter screen, and the surface of the sealing plate is provided with a sealing gasket.

4. The highly sealed micro transformer according to any one of claims 2 to 3, characterized in that: A spring is provided between the transformer body and the shell.

5. The highly sealed micro transformer according to claim 4, characterized in that: Each sealing plate is fixedly connected with a knocking rod for knocking the filter screen in the heat dissipation hole.

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