Mn-Zn ferrite core with good dustproof effect

Abstract

The application discloses a manganese-zinc ferrite core with good dustproof effect, which comprises a ferrite core, the outer wall of the ferrite core is sleeved with an upper dustproof cylinder, the bottom of the ferrite core is movably connected with a lower dustproof cover, the inner wall of the lower dustproof cover is threadedly connected with the outer wall of the bottom of the upper dustproof cylinder, the middle of the upper dustproof cylinder is fixedly connected with a column core, and the outer wall of the column core is movably connected with the inner wall of the ferrite core. When the ferrite core normally works, the heat generated by the ferrite core is conducted to the column core, so that the kerosene in the column core is heated and expanded, the piston is pushed to move upward, the air at the top of the cavity is compressed to enter the inside of the connecting channel, the elastic air bag is expanded, the sealing effect is enhanced, and the setting of the pressure valve enables the pressure valve to be opened when the pressure on one side of the cylinder reaches a certain value, the gas is sprayed out of the exhaust hole and then blows to the chute, so that the sliding ring provided with the chute is rotated, and the dust brush brushes off the dust outside.

Description

Technical Field

[0001] This invention belongs to the field of magnetic core technology, specifically relating to a manganese-zinc ferrite magnetic core with good dustproof effect. Background Technology

[0002] Manganese-zinc ferrite cores are made of dense, homogeneous, ceramic-structured non-metallic magnetic materials with low coercivity, and are also known as soft magnetic ferrites. Currently, with the rapid pace of technological advancements in electronic products both domestically and internationally, the standards and requirements for electronic devices and transformers are becoming increasingly stringent. Power transformer designs are trending towards higher efficiency, thinner profiles, and miniaturization. This presents challenges to the manufacturing and processing of manganese-zinc ferrite cores used in transformer coils, resulting in increasingly complex structures and higher dimensional accuracy requirements.

[0003] However, traditional ferrite cores are not well protected against dust. They are usually covered with a shield. While this can prevent most dust from entering the ferrite core, fine dust particles can still easily enter the ferrite core from the connection points. Furthermore, dust will still accumulate outside the shield, affecting the conduction efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a manganese-zinc ferrite core with good dustproof performance, in order to solve the problem mentioned in the background art that, in the process of using existing manganese-zinc ferrite cores with good dustproof performance, the dustproof performance of traditional ferrite cores is not good enough. Generally, an outer cover is put on the outside. Although this can prevent most dust from entering the interior of the ferrite core, fine dust can still easily enter the interior of the ferrite core from the connection point, and dust will still accumulate outside the protective cover, affecting the conduction efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a manganese-zinc ferrite core with good dustproof effect, comprising a ferrite core, an upper dustproof cylinder sleeved on the outer wall of the ferrite core, a lower dustproof cover movably connected to the bottom of the ferrite core, the inner wall of the lower dustproof cover being threadedly connected to the outer wall of the bottom of the upper dustproof cylinder, a column core fixedly connected to the middle of the upper dustproof cylinder, the outer wall of the column core being movably connected to the inner wall of the ferrite core, two parallel slip rings movably connected to the outer wall of the upper dustproof cylinder, and three evenly distributed dust removal brushes fixedly connected between the two slip rings.

[0006] Specifically, since the upper dust cover and the lower dust cover are connected together, the ferrite core is encased inside to prevent dust from entering, while the outer ferrite core can play a role in dust removal.

[0007] Preferably, the core has a cavity inside, the inner wall of the cavity is movably connected to and tightly fitted with a piston, the inner wall of the cavity and the bottom of the piston are filled with kerosene, and the upper dustproof cylinder has multiple evenly distributed connecting channels inside, one end of each connecting channel is connected to the top of the cavity.

[0008] Specifically, when the ferrite core is working normally, the heat generated by the ferrite core is conducted to the core, causing the kerosene inside the core to expand due to heat, pushing the piston upward, thereby compressing the air at the top of the cavity and entering the interior of the connecting channel.

[0009] Preferably, a sealing ring is fixedly connected to the inner wall of the bottom of the lower dust cover, and an elastic airbag is fixedly connected to the bottom of the upper dust cylinder. The elastic airbag is located on one side of the sealing ring, and a connecting pipe is connected inside the connecting channel. The end of the connecting pipe away from the connecting channel is connected to the inside of the elastic airbag.

[0010] Specifically, the sealing ring seals the upper dust cover and the lower dust cover together. The connecting tube is used to conduct gas. When the air at the top of the cavity is compressed and squeezed into the connecting channel, it will be transported along the connecting tube to the inside of the elastic airbag, causing the elastic airbag to inflate and fill the gap between the upper dust cover and the lower dust cover, further enhancing the sealing effect and preventing dust from entering.

[0011] Preferably, a pressure valve is fixedly connected to the inner wall of the connecting channel, and multiple inclined exhaust holes are opened on the outer wall of the upper dustproof cylinder. The other end of the connecting channel away from the cavity is connected to the exhaust holes.

[0012] Specifically, when the pressure inside the connection channel reaches a certain value, the pressure valve will open, and the gas will be ejected obliquely from the exhaust port.

[0013] Preferably, the bottom of the slip ring is provided with a plurality of evenly distributed inclined grooves, the inclined direction of the inclined grooves is the same as the inclined direction of the exhaust hole, and the inclined grooves are located above the exhaust hole.

[0014] Specifically, after the gas is ejected from the exhaust port, it will blow towards the inclined groove, thereby causing the slip ring with the inclined groove to rotate. At the same time, the ejected gas can also play a certain role in dust removal.

[0015] Preferably, the inner wall of the slip ring is fixedly connected to a plurality of sliders, and the outer wall of the upper dustproof cylinder is provided with a sliding groove, the inner wall of the sliding groove being slidably connected to the outer wall of the slider.

[0016] Specifically, the groove and slider serve as limiters.

[0017] Preferably, the dust removal brush is an arc-shaped plate, and multiple evenly distributed bristles are fixedly connected to the side of the dust removal brush near the upper dustproof cylinder.

[0018] Specifically, the curved design of the dust removal brush allows more bristles to fit against the outer wall of the upper dust cylinder, thus enabling better cleaning of the outer wall of the upper dust cylinder when the dust removal brush rotates.

[0019] Preferably, the pressure valve includes a cylinder, the outer wall of which is fixedly connected to the inner wall of the connecting channel, and four evenly distributed elastic baffles are fixedly connected to the inner wall of the cylinder. Each of the four elastic baffles has a sealing strip fixedly connected to its outer edge, and the four elastic baffles form a sealing structure through the sealing strips.

[0020] Specifically, due to the elastic setting of the elastic baffles, and the fact that the four elastic baffles and the sealing strips form a sealed whole, when the pressure on one side of the cylinder reaches a certain value, the elastic baffles will be pushed open, instantly expelling a large amount of gas. When the ferrite core is not working and cooling, the volume of kerosene shrinks, pulling the piston downward to form a negative pressure, and the gas passes through the elastic baffles and returns to the interior of the connecting channel to reset.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. Through the cavity, when the ferrite core is working normally, the heat generated by the ferrite core is conducted to the core, causing the kerosene inside the core to expand due to heat. This pushes the piston upward, thereby compressing the air at the top of the cavity and entering the interior of the connecting channel. The sealing ring seals the upper dust cover and the lower dust cover when they are connected. The connecting pipe is used to conduct gas. When the air at the top of the cavity is compressed and squeezed into the connecting channel, it will be transported along the connecting pipe to the interior of the elastic airbag, causing the elastic airbag to expand and fill the gap between the upper dust cover and the lower dust cover, further enhancing the sealing effect and preventing dust from entering.

[0023] 2. Due to the elastic design of the pressure valve and the four elastic baffles forming a sealed unit with the sealing strip, when the pressure on one side of the cylinder reaches a certain value, the elastic baffles will be pushed open, instantly releasing a large amount of gas. This gas is discharged along the exhaust port and blown towards the inclined groove, thus causing the slip ring with the inclined groove to rotate. The arc design of the dust removal brush allows more bristles to fit against the outer wall of the upper dust cylinder, thus cleaning the outer wall of the upper dust cylinder better when the dust removal brush rotates, achieving the dust removal effect. At the same time, the sprayed gas also plays a certain role in dust removal, achieving a better dust removal effect. Attached Figure Description

[0024] Figure 1 This is a partial cross-sectional view of the present invention;

[0025] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the dust removal brush of the present invention after it has been inverted;

[0028] Figure 5 For the present invention Figure 2 Enlarged structural diagram at point A;

[0029] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at the mid-elastic airbag;

[0030] Figure 7 For the present invention Figure 4 Enlarged structural diagram at point B;

[0031] Figure 8 This is a cross-sectional view of the pressure valve of the present invention.

[0032] In the diagram: 1. Ferrite core; 2. Upper dustproof cylinder; 3. Lower dustproof cover; 4. Core; 5. Slip ring; 6. Dust removal brush; 7. Piston; 8. Kerosene; 9. Cavity; 10. Slider; 11. Slide groove; 12. Connecting channel; 13. Pressure valve; 14. Exhaust port; 15. Sealing ring; 16. Elastic airbag; 17. Connecting pipe; 18. Inclined groove; 19. Brush bristles; 20. Cylinder body; 21. Elastic baffle; 22. Sealing strip. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figure 1-8This invention provides a technical solution: a manganese-zinc ferrite core with good dustproof effect, comprising a ferrite core 1, an upper dustproof cylinder 2 sleeved on the outer wall of the ferrite core 1, a lower dustproof cover 3 movably connected to the bottom of the ferrite core 1, the inner wall of the lower dustproof cover 3 being threadedly connected to the outer wall of the bottom of the upper dustproof cylinder 2, a column core 4 fixedly connected to the middle of the upper dustproof cylinder 2, the outer wall of the column core 4 being movably connected to the inner wall of the ferrite core 1, two parallel slip rings 5 ​​being movably connected to the outer wall of the upper dustproof cylinder 2, and three evenly distributed dust removal brushes 6 being fixedly connected between the two slip rings 5.

[0035] Specifically, since the upper dust cover 2 and the lower dust cover 3 are connected together, the ferrite core 1 is wrapped inside to prevent dust from entering, while the external ferrite core 1 can play a role in dust removal.

[0036] Preferably, the core 4 has a cavity 9 inside, the inner wall of the cavity 9 is movably connected and tightly fitted with a piston 7, the inner wall of the cavity 9 and the bottom of the piston 7 are filled with kerosene 8, and the upper dustproof cylinder 2 has a plurality of evenly distributed connecting channels 12 inside, one end of each connecting channel 12 is connected to the top of the cavity 9.

[0037] Specifically, when the ferrite core 1 is working normally, the heat generated by the ferrite core 1 is conducted to the core 4, causing the kerosene 8 inside the core 4 to expand due to heat, pushing the piston 7 to move upward, thereby compressing the air at the top of the cavity 9 and entering the interior of the connecting channel 12.

[0038] Preferably, a sealing ring 15 is fixedly connected to the inner wall of the bottom of the lower dust cover 3, and an elastic airbag 16 is fixedly connected to the bottom of the upper dust cylinder 2. The elastic airbag 16 is located on one side of the sealing ring 15, and a connecting pipe 17 is connected inside the connecting channel 12. The end of the connecting pipe 17 away from the connecting channel 12 is connected to the inside of the elastic airbag 16.

[0039] Specifically, the sealing ring 15 seals the upper dust cover 2 and the lower dust cover 3 when they are connected. The connecting pipe 17 is used to conduct gas. When the air at the top of the cavity 9 is compressed and squeezed into the connecting channel 12, it will be transported along the connecting pipe 17 to the inside of the elastic airbag 16, causing the elastic airbag 16 to inflate and fill the gap between the upper dust cover 2 and the lower dust cover 3, further enhancing the sealing effect and preventing dust from entering.

[0040] Preferably, a pressure valve 13 is fixedly connected to the inner wall of the connecting channel 12, and a plurality of inclined exhaust holes 14 are opened on the outer wall of the upper dustproof cylinder 2. The other end of the connecting channel 12 away from the cavity 9 is connected to the exhaust holes 14.

[0041] Specifically, when the pressure inside the connecting channel 12 reaches a certain value, the pressure valve 13 will be opened, and the gas will be ejected obliquely from the exhaust port 14.

[0042] Preferably, the bottom of the slip ring 5 is provided with a plurality of evenly distributed inclined grooves 18, the inclined direction of the inclined grooves 18 is the same as the inclined direction of the exhaust hole 14, and the inclined grooves 18 are located above the exhaust hole 14.

[0043] Specifically, after the gas is ejected from the exhaust port 14, it will blow towards the inclined groove 18, thereby causing the slip ring 5 with the inclined groove 18 to rotate. At the same time, the ejected gas can also play a certain role in dust removal.

[0044] Preferably, the inner wall of the slip ring 5 is fixedly connected with a plurality of sliders 10, and the outer wall of the upper dustproof cylinder 2 is provided with a sliding groove 11, the inner wall of the sliding groove 11 being slidably connected to the outer wall of the slider 10.

[0045] Specifically, the groove 11 and the slider 10 serve as limiters.

[0046] Preferably, the dust removal brush 6 is an arc-shaped plate, and a plurality of evenly distributed bristles 19 are fixedly connected to the side of the dust removal brush 6 near the upper dustproof cylinder 2.

[0047] Specifically, the arc-shaped design of the dust removal brush 6 allows more bristles 19 to fit against the outer wall of the upper dustproof cylinder 2, thus enabling the dust removal brush 6 to better clean the outer wall of the upper dustproof cylinder 2 when it rotates.

[0048] Preferably, the pressure valve 13 includes a cylinder 20, the outer wall of the cylinder 20 is fixedly connected to the inner wall of the connecting channel 12, and four evenly distributed elastic baffles 21 are fixedly connected to the inner wall of the cylinder 20. Each of the four elastic baffles 21 has a sealing strip 22 fixedly connected to its outer edge, and the four elastic baffles 21 form a sealing structure through the sealing strips 22.

[0049] Specifically, due to the elastic setting of the elastic baffle 21, and the cooperation of the four elastic baffles 21 with the sealing strip 22 to form a sealed whole, when the pressure on one side of the cylinder 20 reaches a certain value, the elastic baffle 21 will be pushed open, instantly expelling a large amount of gas. When the ferrite core 1 is not working and cooling, the volume of kerosene 8 shrinks, pulling the piston 7 downward to form a negative pressure. The gas passes through the elastic baffle 21 and returns to the interior of the connecting channel 12 to reset.

[0050] The working principle and usage process of this invention are as follows: During use, the upper dustproof cylinder 2 and the lower dustproof cover 3 are connected together, thus enclosing the ferrite core 1 internally to prevent dust from entering. The external ferrite core 1 also serves to remove dust. When the ferrite core 1 is working normally, the heat generated by it is conducted to the core 4, causing the kerosene 8 inside the core 4 to expand and push the piston 7 upwards. This compresses the air at the top of the cavity 9 and allows it to enter the connecting channel 12. The sealing ring 15 seals the connection between the upper dustproof cylinder 2 and the lower dustproof cover 3. The connecting pipe 17 conducts gas. When the air at the top of the cavity 9 is compressed and forced into the connecting channel 12, it is transported along the connecting pipe 17 to the elastic airbag 16, causing the elastic airbag 16 to expand and fill the gap between the upper dustproof cylinder 2 and the lower dustproof cover 3, further enhancing the sealing effect. To prevent dust from entering, due to the elastic setting of the elastic baffle 21, and the cooperation of the four elastic baffles 21 with the sealing strip 22 to form a sealed whole, when the pressure on one side of the cylinder 20 reaches a certain value, the elastic baffle 21 will be pushed open, instantly expelling a large amount of gas, which will be discharged along the exhaust hole 14. After the gas is ejected from the exhaust hole 14, it will blow towards the inclined groove 18, thereby blowing the slip ring 5 with the inclined groove 18 to rotate. The arc design of the dust removal brush 6 allows more bristles 19 to fit against the outer wall of the upper dustproof cylinder 2, so that the outer wall of the upper dustproof cylinder 2 can be cleaned better when the dust removal brush 6 rotates, thereby achieving the dust removal effect. At the same time, the ejected gas can also play a certain role in dust removal, so as to achieve a better dust removal effect. When the ferrite core 1 is not working and cooling, the volume of kerosene 8 shrinks, pulling the piston 7 downward to form a negative pressure, and the gas passes through the elastic baffle 21 and returns to the interior of the connecting channel 12 to reset.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A manganese-zinc ferrite core with good dustproof effect, comprising a ferrite core (1), characterized in that: The outer wall of the ferrite core (1) is fitted with an upper dustproof cylinder (2), and the bottom of the ferrite core (1) is movably connected with a lower dustproof cover (3). The inner wall of the lower dustproof cover (3) is threadedly connected to the outer wall of the bottom of the upper dustproof cylinder (2). A column core (4) is fixedly connected to the middle of the upper dustproof cylinder (2). The outer wall of the column core (4) is movably connected to the inner wall of the ferrite core (1). Two parallel slip rings (5) are movably connected to the outer wall of the upper dustproof cylinder (2). Three evenly distributed dust removal brushes (6) are fixedly connected between the two slip rings (5). The core (4) has a cavity (9) inside. The inner wall of the cavity (9) is movably connected to and tightly fitted with a piston (7). The inner wall of the cavity (9) and the bottom of the piston (7) are filled with kerosene (8). The upper dustproof cylinder (2) has multiple evenly distributed connecting channels (12) inside. One end of each connecting channel (12) is connected to the top of the cavity (9). A sealing ring (15) is fixedly connected to the inner wall of the bottom of the lower dust cover (3), and an elastic airbag (16) is fixedly connected to the bottom of the upper dust cylinder (2). The elastic airbag (16) is located on one side of the sealing ring (15). A connecting pipe (17) is connected inside the connecting channel (12). The end of the connecting pipe (17) away from the connecting channel (12) is connected to the inside of the elastic airbag (16). A pressure valve (13) is fixedly connected to the inner wall of the connecting channel (12), and a plurality of inclined exhaust holes (14) are opened on the outer wall of the upper dustproof cylinder (2). The other end of the connecting channel (12) away from the cavity (9) is connected to the exhaust holes (14).

2. The manganese-zinc ferrite core with good dustproof effect according to claim 1, characterized in that: The bottom of the slip ring (5) has a plurality of evenly distributed inclined grooves (18), the inclined direction of the inclined grooves (18) is the same as the inclined direction of the exhaust hole (14), and the inclined grooves (18) are located above the exhaust hole (14).

3. The manganese-zinc ferrite core with good dustproof effect according to claim 1, characterized in that: The inner wall of the slip ring (5) is fixedly connected to multiple sliders (10), and the outer wall of the upper dustproof cylinder (2) is provided with a sliding groove (11), the inner wall of the sliding groove (11) is slidably connected to the outer wall of the slider (10).

4. The manganese-zinc ferrite core with good dustproof effect according to claim 1, characterized in that: The dust removal brush (6) is an arc-shaped plate, and a number of evenly distributed bristles (19) are fixedly connected to the side of the dust removal brush (6) near the upper dustproof cylinder (2).

5. The manganese-zinc ferrite core with good dustproof effect according to claim 1, characterized in that: The pressure valve (13) includes a cylinder (20), the outer wall of the cylinder (20) is fixedly connected to the inner wall of the connecting channel (12), and four evenly distributed elastic baffles (21) are fixedly connected to the inner wall of the cylinder (20). A sealing strip (22) is fixedly connected to the outer edge of each of the four elastic baffles (21), and the four elastic baffles (21) form a sealing structure through the sealing strip (22).

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