High-efficiency energy-saving sintering furnace

Abstract

The utility model relates to a kind of high-efficiency energy-saving sintering furnaces, it is characterized by: including left furnace body and right furnace body, left furnace body side wall is equipped with left epitaxial tube, right furnace body side wall is equipped with right epitaxial tube, the top wall between left epitaxial tube and the top wall of right epitaxial tube is equipped with connecting pipe, the both ends of connecting pipe are connected with left electromagnetic valve and right electromagnetic valve, left epitaxial tube terminal is connected with left suction pipe, left suction fan is connected to the lower end of left suction pipe, the gas outlet of left suction fan is connected with left return gas pipe, left return gas pipe is connected with the left side of connecting pipe, left return gas pipe is connected with left check valve, right epitaxial tube terminal is connected with right suction pipe, right suction fan is connected to the lower end of right suction pipe, the gas outlet of right suction fan is connected with right return gas pipe, right return gas pipe is connected with the right side of connecting pipe, right return gas pipe is connected with right check valve.

Description

Technical Field

[0001] This utility model relates to the field of magnet sintering technology, specifically to a high-efficiency and energy-saving sintering furnace. Background Technology

[0002] After being melted, magnetic materials are crushed and ground into very fine powder. To firmly bind these loose powder particles together, sintering is required. This involves heating the pressed powder blank at a high temperature (below the material's melting point), causing the powder particles to bond together through processes such as atomic diffusion and mass migration. This process significantly reduces porosity between powder particles, making the material more compact. High density means more magnetic material per unit volume, which is fundamental to achieving high magnetic properties. Strong "neck" connections form between the powder particles, ultimately creating a robust whole that can withstand the forces of machining and use. Sintering densification provides an ideal environment for the orderly arrangement and stable existence of magnetic domains.

[0003] The sintering of magnetic powder must be carried out in a sintering furnace at temperatures above 1000 degrees Celsius. To improve sintering quality, the temperature during the sintering process is gradually increased from a lower temperature to the sintering temperature. After a batch of magnets is sintered and removed from the furnace, the furnace temperature needs to be lowered to 200°C to 400°C to provide an initial heating temperature environment for the next batch of magnets to be sintered. In existing technologies, a single furnace is used for sintering. After each batch of magnets is sintered, it is necessary to wait for the heat to dissipate to reach a lower temperature. The dissipated heat cannot be utilized, resulting in energy waste. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency and energy-saving sintering furnace that can improve the sintering efficiency of magnets while saving energy.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A high-efficiency and energy-saving sintering furnace includes a left furnace body and a right furnace body. The left furnace body has a left extension tube on its side wall, and the right furnace body has a right extension tube on its side wall. A connecting pipe is provided between the top walls of the left and right extension tubes. A left solenoid valve and a right solenoid valve are respectively connected to the two ends of the connecting pipe. A left exhaust pipe is connected to the end of the left extension tube. A left exhaust fan is connected to the lower end of the left exhaust pipe. A left return pipe is connected to the outlet of the left exhaust fan. The left return pipe is connected to the left side of the connecting pipe and is connected to a left check valve. A right exhaust pipe is connected to the end of the right extension tube. A right exhaust fan is connected to the lower end of the right exhaust pipe. A right return pipe is connected to the outlet of the right exhaust fan. The right return pipe is connected to the right side of the connecting pipe and is connected to a right check valve. A left door panel is hinged to the left end of the left furnace body, and a right door panel is hinged to the right end of the right furnace body.

[0006] Specifically, both the left and right furnace bodies are horizontally cylindrical and are coaxially arranged.

[0007] Specifically, both the left and right solenoid valves are equipped with a control host.

[0008] Specifically, both the left and right exhaust fans are centrifugal exhaust fans. A differential pressure detection pipeline is connected between the exhaust end and the exhaust end of the left and right exhaust fans, and a differential pressure gauge is connected to the differential pressure detection pipeline.

[0009] Specifically, the exhaust ends of both the left and right exhaust fans are connected to a front filter pipe section, and the exhaust ends of both the left and right exhaust fans are equipped with a rear filter pipe section.

[0010] Specifically, temperature sensors are installed on the top walls of both the left and right furnace bodies.

[0011] Specifically, temperature indicator lights are installed on the top walls of both the left and right furnace bodies.

[0012] Specifically, the extension direction of the left epitaxial tube is perpendicular to the axis of the left furnace body.

[0013] Specifically, the extension direction of the right outer tube is perpendicular to the axis of the right furnace body.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: When the left furnace body 1 is in operation, the internal temperature of the left furnace body 1 is raised to over 1000 degrees Celsius to sinter the magnetic powder inside. During this process, the right furnace body 2 is in a non-operating state at a lower temperature. After the left furnace body 1 has completed sintering, the magnets inside are removed, and the next batch of magnetic powder to be sintered is placed into the right furnace body 2. Then, both the left door panel 15 and the right door panel 25 are kept open with a small ventilation gap.

[0015] Next, keeping the left solenoid valve 31 closed, the right solenoid valve 32 is opened. Then, the left exhaust fan 13 starts operating, drawing the high-temperature waste heat gas from the left furnace body 1 through the left exhaust pipe 12. The gas passes through the pre-filter section 131 and enters the left exhaust fan 13. The left exhaust fan 13 then pumps the high-temperature waste heat gas to the left return pipe 14 (the gas passes through the post-filter section 132). Next, the high-temperature waste heat gas sequentially passes through the connecting pipe 3 and the right extension pipe 21 into the right furnace body 2 (the left solenoid valve 31 is closed, and the right solenoid valve 32 is open), allowing the high-temperature waste heat gas to flow through the inner cavity of the right furnace body 2 for preheating (both the left door panel 15 and the right door panel 25 are kept open with a small ventilation gap). This reduces the energy consumption and time required for the subsequent heating process of the right furnace body 2, thereby improving sintering efficiency and saving energy. In addition, extracting the high-temperature waste heat gas can accelerate the cooling of the left furnace body 1, providing a lower temperature environment for subsequent batches of magnetic powder entering the left furnace body 1. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A structural view of a high-efficiency and energy-saving sintering furnace; Figure 2 for Figure 1 A magnified view of a portion of the document; Figure 3 Another structural view of the high-efficiency and energy-saving sintering furnace.

[0018] In the picture: 1. Left furnace body; 11. Left extension tube; 12. Left exhaust pipe; 13. Left exhaust fan; 131. Front filter section; 132. Rear filter section; 14. Left return pipe; 141. Left check valve; 15. Left door panel; 16. Temperature sensor; 17. Temperature indicator light; 2. Right furnace body; 21. Right extension tube; 22. Right exhaust pipe; 23. Right exhaust fan; 24. Right return pipe; 241. Right check valve; 25. Right door panel; 3. Connecting pipe; 31. Left solenoid valve; 311. Control unit; 32. Right solenoid valve; 4. Differential pressure detection pipeline; 41. Differential pressure gauge. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] See Figures 1 to 3 A high-efficiency and energy-saving sintering furnace includes a left furnace body 1 and a right furnace body 2. The left furnace body 1 has a left extension tube 11 on its side wall, and the right furnace body 2 has a right extension tube 21 on its side wall. A connecting pipe 3 is provided between the top wall of the left extension tube 11 and the top wall of the right extension tube 21. A left solenoid valve 31 and a right solenoid valve 32 are respectively connected to the two ends of the connecting pipe 3.

[0021] The left extension pipe 11 is connected to the left exhaust pipe 12 at its end. The lower end of the left exhaust pipe 12 is connected to the left exhaust fan 13. The outlet of the left exhaust fan 13 is connected to the left return pipe 14. The upper end of the left return pipe 14 is connected to the left side of the connecting pipe 3. The lower end of the left return pipe 14 is connected to the left check valve 141.

[0022] The right outer extension pipe 21 is connected to a right exhaust pipe 22 at its end. The lower end of the right exhaust pipe 22 is connected to a right exhaust fan 23. The outlet of the right exhaust fan 23 is connected to a right return pipe 24. The upper end of the right return pipe 24 is connected to the right side of the connecting pipe 3, and the lower end of the right return pipe 24 is connected to a right check valve 241. The left end of the left furnace body 1 is hinged to a left door panel 15, and the right end of the right furnace body 2 is hinged to a right door panel 25.

[0023] Specifically, both the left furnace body 1 and the right furnace body 2 are horizontally cylindrical, and the left furnace body 1 and the right furnace body 2 are coaxially arranged.

[0024] Specifically, both the left solenoid valve 31 and the right solenoid valve 32 are equipped with a control host 311.

[0025] Specifically, see Figure 2 Both the left exhaust fan 13 and the right exhaust fan 23 are centrifugal exhaust fans. A differential pressure detection pipeline 4 is connected between the exhaust end and the exhaust end of the left exhaust fan 13 and the right exhaust fan 23, and a differential pressure gauge 41 is connected to the differential pressure detection pipeline 4.

[0026] Specifically, the exhaust ends of the left exhaust fan 13 and the right exhaust fan 23 are both connected to a front filter pipe section 131, and the exhaust ends of the left exhaust fan 13 and the right exhaust fan 23 are both equipped with a rear filter pipe section 132.

[0027] Specifically, temperature sensors 16 are installed on the top walls of both the left furnace body 1 and the right furnace body 2.

[0028] Specifically, temperature indicator lights 17 are provided on the top walls of both the left furnace body 1 and the right furnace body 2.

[0029] Specifically, the extension direction of the left outer tube 11 is perpendicular to the axis of the left furnace body 1.

[0030] Specifically, the extension direction of the right outer tube 21 is perpendicular to the axis of the right furnace body 2.

[0031] The working principle of this utility model is as follows: When the left furnace body 1 is in operation, the internal temperature of the left furnace body 1 is raised to over 1000 degrees Celsius to sinter the magnetic powder inside. During this process, the right furnace body 2 is in a non-operating state at a lower temperature. After the left furnace body 1 has completed sintering, the magnets inside are removed, and the next batch of magnetic powder to be sintered is placed into the right furnace body 2. Then, both the left door panel 15 and the right door panel 25 are kept open with a small ventilation gap.

[0032] Next, keeping the left solenoid valve 31 closed, the right solenoid valve 32 is opened. Then, the left exhaust fan 13 starts operating, drawing the high-temperature waste heat gas from the left furnace body 1 through the left exhaust pipe 12. The gas passes through the pre-filter section 131 and enters the left exhaust fan 13. The left exhaust fan 13 then pumps the high-temperature waste heat gas to the left return pipe 14 (the gas passes through the post-filter section 132). Next, the high-temperature waste heat gas sequentially passes through the connecting pipe 3 and the right extension pipe 21 into the right furnace body 2 (the left solenoid valve 31 is closed, and the right solenoid valve 32 is open), allowing the high-temperature waste heat gas to flow through the inner cavity of the right furnace body 2 for preheating (both the left door panel 15 and the right door panel 25 are kept open with a small ventilation gap). This reduces the energy consumption and time required for the subsequent heating process of the right furnace body 2, thereby improving sintering efficiency and saving energy. In addition, extracting the high-temperature waste heat gas can accelerate the cooling of the left furnace body 1, providing a lower temperature environment for subsequent batches of magnetic powder entering the left furnace body 1.

[0033] By controlling the alternating opening and closing of the left solenoid valve 31 and the right solenoid valve 32, and by controlling the alternating start of the left exhaust fan 13 and the right exhaust fan 23, the left furnace body 1 and the right furnace body 2 can work alternately: the waste heat of the high-temperature furnace body (which has just completed sintering) is used to preheat the low-temperature furnace body (which is to be sintered), effectively recovering the waste heat, while accelerating the cooling of the high-temperature furnace body, thus achieving high efficiency and energy saving.

[0034] The exhaust ends of the two exhaust fans are connected to the front filter pipe section 131, and the exhaust ends of the two exhaust fans are equipped with the rear filter pipe section 132. The front filter pipe section 131 and the rear filter pipe section 132 are used to filter out trace amounts of powder that may be drawn out from the furnace body.

[0035] Temperature sensors 16 and temperature indicator lights 17 are installed on the top walls of both the left furnace body 1 and the right furnace body 2. The temperature sensors 16 sense the furnace body temperature in real time and use different colors to indicate the high and low temperature status through the temperature indicator lights 17 to guide the operator in loading and unloading materials.

[0036] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A high-efficiency and energy-saving sintering furnace, characterized in that: The furnace includes a left furnace body and a right furnace body. The left furnace body has a left extension pipe on its side wall, and the right furnace body has a right extension pipe on its side wall. A connecting pipe is provided between the top walls of the left and right extension pipes. The two ends of the connecting pipe are connected to a left solenoid valve and a right solenoid valve, respectively. The left extension pipe is connected to a left exhaust pipe at its end. The lower end of the left exhaust pipe is connected to a left exhaust fan. The outlet of the left exhaust fan is connected to a left return pipe. The left return pipe is connected to the left side of the connecting pipe and is connected to a left check valve. The right extension pipe is connected to a right exhaust pipe at its end. The lower end of the right exhaust pipe is connected to a right exhaust fan. The outlet of the right exhaust fan is connected to a right return pipe. The right return pipe is connected to the right side of the connecting pipe and is connected to a right check valve. A left door panel is hinged to the left end of the left furnace body, and a right door panel is hinged to the right end of the right furnace body.

2. The high-efficiency energy-saving sintering furnace according to claim 1, characterized in that: Both the left and right furnace bodies are horizontally cylindrical, and are arranged coaxially.

3. The high-efficiency energy-saving sintering furnace according to claim 1, characterized in that: Both the left and right solenoid valves are equipped with a control host.

4. The high-efficiency energy-saving sintering furnace according to claim 1, characterized in that: Both the left and right exhaust fans are centrifugal exhaust fans. A differential pressure detection pipeline is connected between the exhaust end and the exhaust end of the left and right exhaust fans, and a differential pressure gauge is connected to the differential pressure detection pipeline.

5. The high-efficiency energy-saving sintering furnace according to claim 1, characterized in that: Both the left and right exhaust fans have a front filter pipe section connected to their exhaust ends, and both the left and right exhaust fans have a rear filter pipe section at their exhaust ends.

6. The high-efficiency energy-saving sintering furnace according to claim 1, characterized in that: Temperature sensors are installed on the top walls of both the left and right furnace bodies.

7. The high-efficiency energy-saving sintering furnace according to claim 1, characterized in that: Temperature indicator lights are installed on the top walls of both the left and right furnace bodies.

8. The high-efficiency energy-saving sintering furnace according to claim 1, characterized in that: The extension direction of the left outer tube is perpendicular to the axis of the left furnace body.

9. The high-efficiency energy-saving sintering furnace according to claim 1, characterized in that: The extension direction of the right outer tube is perpendicular to the axis of the right furnace body.

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