A sintering thermal cycle device for soft ferrite magnetic cores

Abstract

The present invention develops a sintering thermal cycle device for soft magnetic ferrite cores. By integrating a preheating chamber, a steam treatment chamber, a sintering chamber, and a cooling chamber, and simultaneously recycling the high-temperature gas in each section, the energy utilization rate of the sintering process is effectively improved, energy is saved, and economic benefits are enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of soft ferrite core processing, in particular to a soft ferrite core sintering thermal cycle device. Background Art

[0002] Soft ferrite materials are Fe 2 O 3 Ferromagnetic oxides are the main components and are produced by powder metallurgy. They have low loss factor, high quality factor Q, stable magnetic permeability with temperature / time relationship, and are the slowest magnetic permeability decrease during operation. They are widely used in filters, tuned filters, load coils, impedance matching transformers, and proximity sensors. There are several types such as Mn-Zn, Cu-Zn, and Ni-Zn, among which Mn-Zn ferrite materials have the largest output and usage.

[0003] In the production and processing of soft ferrites, the raw materials need to be sintered. The existing sintering technology is difficult to reuse high-temperature gas, and the energy utilization rate is not high, resulting in great waste, which is not conducive to the economy and energy conservation.

[0004] At the same time, in the sintering process of the high flexural strength manganese-zinc soft ferrite material developed by our company, high-temperature and high-pressure steam is required for pretreatment, but the traditional sintering device is a fixed device, and it is inconvenient to change the sintering gas.

[0005] The present invention develops a soft ferrite core sintering thermal cycle device, which effectively improves the energy utilization rate of the sintering process, saves energy and improves economic benefits by combining a preheating chamber, a water vapor treatment chamber, a sintering chamber and a cooling chamber together and recycling the high-temperature gas in each section. Summary of the invention

[0006] The present invention develops a soft ferrite core sintering thermal cycle device, which effectively improves the energy utilization rate of the sintering process, saves energy and improves economic benefits by combining a preheating chamber, a water vapor treatment chamber, a sintering chamber and a cooling chamber together and recycling the high-temperature gas in each section.

[0007] A sintering thermal cycle device for soft magnetic ferrite cores, the sintering thermal cycle device for soft magnetic ferrite cores includes a preheating chamber 1, a steam treatment chamber 2, a sintering chamber 3, and a cooling chamber 4. A first movable partition 5 is arranged between the preheating chamber 1 and the steam treatment chamber 2. The first movable partition 5 is connected to a first winch 6 through a cable. A second movable partition 7 is arranged between the steam treatment chamber 2 and the sintering chamber 3. The second movable partition 7 is connected to a second winch 8 through a cable. A third movable partition 9 is arranged between the sintering chamber 3 and the cooling chamber 4. The third movable partition 9 is connected to a third winch 10 through a cable. A displacement table 11 is arranged through the bottoms of the preheating chamber 1, the steam treatment chamber 2, the sintering chamber 3, and the cooling chamber 4;

[0008] A first jacket 12 is arranged outside the preheating chamber 1. The first jacket 12 is provided with a first jacket inlet 13 and a first jacket outlet 14;

[0009] The steam treatment chamber 2 is provided with a steam inlet 15 and a steam outlet 16. The steam outlet 16 is connected to the first jacket inlet 13 through a connecting pipe 17;

[0010] The sintering chamber 3 is provided with a sintering gas inlet pipe 19 and a sintering gas outlet 20. A second jacket 21 is arranged outside the sintering gas inlet pipe 19. A pair of annular grooves 23 are arranged on the sintering gas inlet pipe 19. A plurality of connecting rods 24 are arranged between the annular grooves 23. An empty area is arranged between the connecting rods 24. The end of the sintering gas inlet pipe 19 is sealed and a heater 25 is installed. An annular sleeve 26 is movably sleeved with the annular groove 23 through a ball 28. Sealing blocks 27 are arranged at both ends of the annular sleeve 26. The annular sleeve 26 is connected to a spiral pipe 29. The end of the spiral pipe 29 is open. The spiral pipe 29 is arranged around the heater 25;

[0011] The steam generator 30 is provided with a third jacket 31 and a steam outlet 37. The third jacket 31 is provided with a third jacket inlet 32 and a third jacket outlet 33. A water delivery pipe 34 is arranged at the top of the steam generator 30. The bottom of the water delivery pipe 34 is connected to an atomizer 35. The third jacket inlet 32 is connected to the sintering gas outlet 20 through a pipeline. The steam outlet 37 is connected to the steam inlet 15 through a pipeline;

[0012] The cooling chamber 4 is provided with a cooling air inlet 39 and a cooling air outlet 40; The air collector 41 collects the high-temperature gases at the first jacket outlet 14, the third jacket outlet 33, and the cooling air outlet 40, and is connected to the inlet of the second jacket 21 through a circulation pipe 42.

[0013] Further, the displacement table 11 is a conveyor belt.

[0014] Further, a running track is laid on the displacement stage 11, and the soft ferrite material is transported by a running trolley that cooperates with the running track.

[0015] Further, a temperature measuring head 18 is provided in the water vapor treatment chamber 2.

[0016] Further, a temperature measuring block 22 is provided at the bottom of the sintering chamber 3.

[0017] Further, a temperature and pressure induction head 36 is provided in the water vapor generator 30.

[0018] Further, a pressure relief port 38 is provided on the water vapor generator 30.

[0019] Advantages of the present invention:

[0020] 1. By recycling high-temperature gas at multiple levels, the present invention can reduce the energy consumption in the sintering process of the soft ferrite core by about 40%.

[0021] 2. The setting of heating at the top and temperature measurement at the top of the sintering chamber is beneficial to monitoring the temperature on the surface of the soft ferrite material at the bottom, preventing the situation where the temperature at the top is high and the temperature at the bottom is low inside the sintering chamber, and effectively preventing the situation where the surface temperature of the soft ferrite material at the bottom is insufficient.

[0022] 3. The spiral tube provided in the annular sleeve and the surrounding heater is beneficial to improving the heating speed of the sintering gas, can improve the energy utilization rate. At the same time, after the sintering gas is introduced, due to the reaction force of the tangential injection of the spiral tube, the annular sleeve and the spiral tube will rotate around the sintering gas inlet pipe and the heater, further improving the heating speed and energy utilization rate, and at the same time making the temperature in the sintering chamber more uniform. Description of the drawings

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is an enlarged schematic diagram of the annular sleeve of the present invention;

[0025] Figure 3 is a schematic diagram of the water vapor generator of the present invention;

[0026] In the figure, 1 - preheating chamber, 2 - steam treatment chamber, 3 - sintering chamber, 4 - cooling chamber, 5 - first movable partition board, 6 - first hoist, 7 - second movable partition board, 8 - second hoist, 9 - third movable partition board, 10 - third hoist, 11 - displacement table, 12 - first jacket, 13 - first jacket inlet, 14 - first jacket outlet, 15 - steam inlet, 16 - steam outlet, 17 - connecting pipe, 18 - temperature measuring head, 19 - sintering gas inlet pipe, 20 - sintering gas outlet, 21 - second jacket, 22 - temperature measuring block, 23 - annular groove, 24 - connecting rod, 25 - heater, 26 - annular sleeve, 27 - sealing block, 28 - ball, 29 - spiral pipe, 30 - steam generator, 31 - third jacket, 32 - third jacket inlet, 33 - third jacket outlet, 34 - water delivery pipe, 35 - atomizer, 36 - temperature and pressure induction head, 37 - steam outlet, 38 - pressure relief port, 39 - cooling air inlet, 40 - cooling air outlet, 41 - air collector, 42 - circulation pipe Detailed implementation mode

[0027] Embodiment 1

[0028] A soft magnetic ferrite core sintering thermal cycle device includes a preheating chamber 1, a steam treatment chamber 2, a sintering chamber 3, and a cooling chamber 4. A first movable partition board 5 is arranged between the preheating chamber 1 and the steam treatment chamber 2. The first movable partition board 5 is connected to the first hoist 6 through a cable. A second movable partition board 7 is arranged between the steam treatment chamber 2 and the sintering chamber 3. The second movable partition board 7 is connected to the second hoist 8 through a cable. A third movable partition board 9 is arranged between the sintering chamber 3 and the cooling chamber 4. The third movable partition board 9 is connected to the third hoist 10 through a cable; A displacement table 11 is arranged through the bottoms of the preheating chamber 1, the steam treatment chamber 2, the sintering chamber 3, and the cooling chamber 4;

[0029] A first jacket 12 is arranged outside the preheating chamber 1. The first jacket 12 is provided with a first jacket inlet 13 and a first jacket outlet 14;

[0030] The steam treatment chamber 2 is provided with a steam inlet 15, a steam outlet 16, and a temperature measuring head 18. The steam outlet 16 is connected to the first jacket inlet 13 through a connecting pipe 17;

[0031] The sintering chamber 3 is provided with a sintering gas inlet pipe 19 and a sintering gas outlet 20. A temperature measuring block 22 is provided at the bottom of the sintering chamber 3. A second jacket 21 is provided outside the sintering gas inlet pipe 19. A pair of annular grooves 23 are provided on the sintering gas inlet pipe 19. A number of connecting rods 24 are provided between the annular grooves 23. The area between the connecting rods 24 is a hollow area. The end of the sintering gas inlet pipe 19 is sealed and a heater 25 is installed. An annular sleeve 26 is movably sleeved with the annular groove 23 through a ball 28. Sealing blocks 27 are provided at both ends of the annular sleeve 26. The annular sleeve 26 is connected to a spiral pipe 29. The end of the spiral pipe 29 is open. The spiral pipe 29 is arranged around the heater 25.

[0032] The steam generator 30 is provided with a third jacket 31, a steam outlet 37, a temperature and pressure induction head 36, and a pressure relief port 38. The third jacket 31 is provided with a third jacket inlet 32 and a third jacket outlet 33. A water delivery pipe 34 is provided at the top of the steam generator 30. The bottom of the water delivery pipe 34 is connected to an atomizer 35. The third jacket inlet 32 is connected to the sintering gas outlet 20 through a pipeline. The steam outlet 37 is connected to the steam inlet 15 through a pipeline.

[0033] The cooling chamber 4 is provided with a cooling air inlet 39 and a cooling air outlet 40. The air collector 41 collects the high-temperature gases from the first jacket outlet 14, the third jacket outlet 33, and the cooling air outlet 40, and is connected to the inlet of the second jacket 21 through a circulation pipe 42.

[0034] A running track is laid on the displacement table 11, and the soft magnetic ferrite material is transported by a running trolley that cooperates with the running track.

[0035] When the above-mentioned soft magnetic ferrite core sintering thermal cycle device is working, first, the soft magnetic ferrite material is sequentially fed into the preheating chamber, the steam treatment chamber, the sintering chamber, and the cooling chamber by the running trolley. After entering the corresponding area, the movable partition of this area is closed by the winch. The sintering gas enters from the sintering gas inlet pipe, is first preheated in the second jacket, then enters the spiral pipe and is heated by the heater, and the spiral pipe starts to rotate. The sintering gas then enters the third jacket of the steam generator, making the sintering gas above 1200 °C the energy source of high-temperature and high-pressure steam. The sintering gas continues to be collected by the air collector, while the high-temperature and high-pressure steam enters the steam treatment chamber, then enters the first jacket, and finally is collected by the air collector. The air collector guides the collected sintering gas, steam, and cooling air into the second jacket together.

[0036] Compared with setting the steam generator and the sintering chamber separately, the soft magnetic ferrite core sintering thermal cycle device of the present invention can reduce the energy consumption in the soft magnetic ferrite core sintering process by about 40%. After welding the annular sleeve and the sintering gas inlet pipe in the soft magnetic ferrite core sintering thermal cycle device of the present invention so that it cannot rotate, the energy consumption in the soft magnetic ferrite core sintering process increases by about 10%, but compared with setting the steam generator and the sintering chamber separately, its energy consumption is still reduced by nearly 30%.

[0037] Finally, the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sintering thermal cycle device for soft magnetic ferrite cores, Characterized in that: The sintering thermal cycle device for soft magnetic ferrite cores includes a preheating chamber, a steam treatment chamber, a sintering chamber, and a cooling chamber. A first movable partition is provided between the preheating chamber and the steam treatment chamber. The first movable partition is connected to a first winch through a cable. A second movable partition is provided between the steam treatment chamber and the sintering chamber. The second movable partition is connected to a second winch through a cable. A third movable partition is provided between the sintering chamber and the cooling chamber. The third movable partition is connected to a third winch through a cable. A displacement table is provided through the bottoms of the preheating chamber, the steam treatment chamber, the sintering chamber, and the cooling chamber; A first jacket is provided outside the preheating chamber. The first jacket is provided with a first jacket inlet and a first jacket outlet; The steam treatment chamber is provided with a steam inlet and a steam outlet. The steam outlet is connected to the first jacket inlet through a connecting pipe; The sintering chamber is provided with a sintering gas inlet pipe and a sintering gas outlet. A second jacket is provided outside the sintering gas inlet pipe. A pair of annular grooves are provided on the sintering gas inlet pipe. A number of connecting rods are provided between the annular grooves. A hollow area is provided between the connecting rods. The end of the sintering gas inlet pipe is sealed and a heater is installed. An annular sleeve is movably sleeved on the annular groove through a ball. Sealing blocks are provided at both ends of the annular sleeve. The annular sleeve is connected to a spiral pipe. The end of the spiral pipe is open. The spiral pipe is arranged around the heater; The steam generator is provided with a third jacket and a steam outlet. The third jacket is provided with a third jacket inlet and a third jacket outlet. A water delivery pipe is provided at the top of the steam generator. The bottom of the water delivery pipe is connected to an atomizer. The third jacket inlet is connected to the sintering gas outlet through a pipeline. The steam outlet is connected to the steam inlet through a pipeline; The cooling chamber is provided with a cooling air inlet and a cooling air outlet; An air collector collects the high-temperature gases from the first jacket outlet, the third jacket outlet, and the cooling air outlet, and is connected to the inlet of the second jacket through a circulation pipe.

2. The sintering thermal cycle device for soft magnetic ferrite cores according to claim 1, Characterized in that: The displacement table is a conveyor belt.

3. The sintering thermal cycle device for soft magnetic ferrite cores according to claim 1, Characterized in that: A running track is laid on the displacement table, and a running trolley cooperating with the running track is used to transport the soft magnetic ferrite material.

4. The sintering thermal cycle device for soft magnetic ferrite cores according to claim 1, Characterized in that: A temperature measuring head is provided in the steam treatment chamber.

5. The sintering thermal cycle device for soft magnetic ferrite cores according to claim 1, Characterized in that: A temperature measuring block is provided at the bottom of the sintering chamber.

6. The sintering thermal cycle device for soft magnetic ferrite cores according to claim 1, Characterized in that: A temperature and pressure induction head is provided in the steam generator.

7. The sintering thermal cycle device for soft magnetic ferrite cores according to claim 1, Characterized in that: A pressure relief port is provided on the steam generator.

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