Vertical degreasing device

Abstract

The utility model discloses a vertical degreasing device which comprises a degreasing tank and a stirring device, a heating device is arranged on the outer side of the degreasing tank, a heat preservation layer is arranged on the outer side of the heating device, and materials in the degreasing tank are degreased through heating and heat preservation; a stirring device is arranged on the inner side of the degreasing tank, and at least one or more temperature detection devices are arranged on the stirring device; the device can contain more metal powder, the powder is fed from the upper side and discharged from the lower side, charging and discharging are more convenient, the charging amount can reach 80% or above, the stirring device is arranged to stir the metal powder on the inner side, the powder is heated more evenly, the temperature in the degreasing tank is monitored in real time through the temperature detection device, and effective degreasing is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of powder metallurgy, in particular to a vertical degreasing device. Background Art

[0002] In the powder metallurgy process, additives are usually added to the metal powder to enable the powder to be formed. These can form a protective film on the metal surface, slowing down the oxidation reaction and helping to maintain the stability of the metal powder. However, during the subsequent sintering process, these additives will decompose and produce gases and impurities, affecting the quality and performance of the product. Therefore, these additives need to be removed before sintering, a process called degreasing. Degreasing is a critical process that largely controls the quality and cost of the sintered product. Incomplete degreasing can easily lead to defects such as cracks, holes, bubbles, and expansion.

[0003] In the existing degreasing process, the metal powder is fed into a horizontal reactor for heating. The powder loading can only reach about 30%, and the powder is easily heated unevenly. At the same time, the horizontal degreasing device is inconvenient to load and discharge. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a vertical degreasing device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solution: a vertical degreasing device, comprising:

[0006] skim tank and stirring device;

[0007] A heating device is provided on the outside of the degreasing tank, and a heat-insulating layer is provided on the outside of the heating device, so that the material in the degreasing tank is degreased by heating and heat-insulating;

[0008] A stirring device is provided inside the degreasing tank, and at least one or more temperature detection devices are provided on the stirring device.

[0009] As a further description of the above technical solution: the degreasing tank includes a cover plate and a tank body, the cover plate is provided with a feed port, an exhaust port and a pressure gauge, and the exhaust port is connected to a vacuum pump.

[0010] As a further description of the above technical solution: the bottom of the tank body is a cone, and a discharge port is opened in the middle.

[0011] As a further description of the above technical solution: the stirring device includes a motor, and the motor is arranged on the cover plate.

[0012] As a further description of the above technical solution: the output end of the motor is connected to a stirring shaft, and the stirring shaft passes through the cover plate and extends to the inner side of the tank body.

[0013] As a further description of the above technical solution: a plurality of blades are connected to the stirring shaft.

[0014] As a further description of the above technical solution: the temperature detection device is arranged on the stirring shaft, and there are three temperature detection devices, which are respectively arranged on the curved surfaces at the upper, middle and lower positions of the stirring shaft.

[0015] As a further description of the above technical solution: the temperature detection device is a thermocouple.

[0016] As a further description of the above technical solution: the heating device is an electric heating coil.

[0017] As a further description of the above technical solution: a cooling layer is provided on the outside of the thermal insulation layer, and the cooling layer is provided with a water outlet and a water inlet to cool the degreasing tank.

[0018] The above technical solution has the following advantages or beneficial effects:

[0019] A vertical degreasing device is set up to hold more metal powder, and the loading capacity can reach more than 80%; the powder enters from the top and exits from the bottom, making loading and unloading more convenient; a stirring device is set up to stir the metal powder in the device, so that the powder is heated more evenly, and the temperature inside the degreasing tank is monitored in real time through the upper, middle and lower temperature point detection devices to ensure effective degreasing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of the degreasing device proposed in the utility model.

[0021] Legend:

[0022] 1. Degreasing tank; 11. Cover plate; 12. Tank body; 13. Feed port; 14. Exhaust port; 15. Pressure gauge; 16. Discharge port; 2. Stirring device; 21. Motor; 22. Stirring shaft; 23. Blades; 3. Temperature detection device; 4. Heating device; 5. Insulation layer; 6. Vacuum pump; 7. Cooling layer; 71. Water outlet; 72. Water inlet. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Reference Figure 1 The utility model provides an embodiment: a vertical degreasing device, comprising: a degreasing tank 1 and a stirring device 2; a heating device 4 is provided on the outside of the degreasing tank 1, and an insulation layer 5 is provided on the outside of the heating device 4, so that the material in the degreasing tank 1 is degreased by heating and insulation; a stirring device 2 is provided on the inside of the degreasing tank 1, and at least one or more temperature detection devices 3 are provided on the stirring device 2.

[0025] In this embodiment, a vertical degreasing device is provided to hold more metal powder. The powder enters from the top and exits from the bottom, making loading and unloading more convenient. The loading amount can reach more than 80%. The metal powder inside the degreasing tank 1 is heated and degreased by the heating device 4. A stirring device 2 is provided to stir the metal powder inside so that the powder is heated more evenly. The temperature inside the degreasing tank 1 is monitored in real time by the temperature detection device 3 to ensure effective degreasing. The additive used in this application is stearic acid.

[0026] The degreasing tank 1 includes a cover plate 11 and a tank body 12 . The cover plate 11 is provided with a feed port 13 , an exhaust port 14 and a pressure gauge 15 . The exhaust port 14 is connected to the vacuum pump 6 .

[0027] In this embodiment, the cover 11 and the tank body 12 are detachably connected by hinges and snaps. The material mixed with metal powder and stearic acid is added to the tank body 12 through the feed port 13 on the cover 11. The exhaust port 14 is used to discharge the gas generated by the thermal decomposition of stearic acid under the action of the vacuum pump 6, and the pressure in the tank body 12 is monitored by the pressure gauge 15.

[0028] The bottom of the tank body 12 is a conical surface, and a discharge port 16 is opened in the middle for pouring out the degreased metal powder from the discharge port 16 .

[0029] The stirring device 2 includes a motor 21 , which is disposed on the cover plate 11 ; an output end of the motor 21 is connected to a stirring shaft 22 , which passes through the cover plate 11 and extends to the inside of the tank body 12 .

[0030] In this embodiment, the motor 21 drives the stirring shaft 22 to rotate, so that the blades on the stirring shaft 22 stir the metal powder, so that the metal powder inside the degreasing tank is heated evenly, and degreasing can be effectively performed.

[0031] In this embodiment, the blade 23 at the bottom end of the stirring shaft 22 is located at the conical surface of the tank body 12, and can stir the metal powder below.

[0032] The temperature detection device 3 is provided on the stirring shaft 22 . There are three temperature detection devices 3 , which are respectively provided on the curved surfaces at both ends and the middle of the stirring shaft 22 . The temperature detection devices 3 are thermocouples.

[0033] In this embodiment, temperature measuring points are set on the curved surfaces at the upper, middle and lower positions of the stirring shaft 22, and a temperature detection device 3 is installed. The temperature of the metal powder at different positions in the degreasing tank 1 is monitored by thermocouple temperature measurement to determine whether the heating is uniform, and then determine the degreasing effect.

[0034] The heating device 4 is an electric heating coil, which is arranged on the outside of the tank body 12 to heat the tank body 12 .

[0035] A cooling layer 7 is provided on the outside of the heat-insulating layer 5 . The cooling layer 7 is provided with a water outlet 71 and a water inlet 72 to cool the degreasing tank 1 .

[0036] In this embodiment, the cooling layer 7 is a volume cavity, which is cooled by circulating water inside. The cooling layer 7 is provided with a water outlet 71 and a water inlet 72. The material of the insulation layer 5 can be rock wool, glass wool, polyurethane foam or ceramic fiber.

[0037] Working principle: Turn on the circulating cooling water; close the discharge port 16, open the feed port 13, and load the metal powder; close the feed port 13, open the exhaust port 14, and use the vacuum pump 6 to draw the vacuum, and read the pressure gauge 15. When the vacuum reaches 10 -2 Pa; turn on the motor 21 to drive the stirring shaft 22 to stir the powder at a low speed; turn on the heating device 4, heat the temperature to 420°C, and keep it warm for 3 hours. The gas generated by the decomposition of stearic acid is discharged from the exhaust port 14 under the action of the vacuum pump 6; turn off the heating device 4, turn off the motor 21, and the powder is cooled to room temperature with the circulating water in the cooling layer 7; turn off the vacuum pump 6 and turn off the circulating cooling water; open the valve of the discharge port 16 to discharge the material, and seal the metal powder for storage.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vertical degreasing device, characterized in that: include: A degreasing tank (1) and a stirring device (2); A heating device (4) is provided on the outside of the degreasing tank (1), and a heat-insulating layer (5) is provided on the outside of the heating device (4), so that the material in the degreasing tank (1) is degreased by heating and heat-insulating. A stirring device (2) is provided inside the degreasing tank (1), and at least one or more temperature detection devices (3) are provided on the stirring device (2).

2. The degreasing device according to claim 1, characterized in that: The degreasing tank (1) comprises a cover plate (11) and a tank body (12); a feed port (13), an exhaust port (14) and a pressure gauge (15) are provided on the cover plate (11); and the exhaust port (14) is connected to a vacuum pump (6).

3. The degreasing device according to claim 2, characterized in that: The bottom of the tank body (12) is a conical surface, and a discharge port (16) is provided in the middle.

4. The degreasing device according to claim 3, characterized in that: The stirring device (2) comprises a motor (21), and the motor (21) is arranged on the cover plate (11).

5. The degreasing device according to claim 4, characterized in that: The output end of the motor (21) is connected to a stirring shaft (22), and the stirring shaft (22) passes through the cover plate (11) and extends to the inside of the tank body (12).

6. The degreasing device according to claim 5, characterized in that: A plurality of blades (23) are connected to the stirring shaft (22).

7. The degreasing device according to claim 5, characterized in that: The temperature detection device (3) is arranged on the stirring shaft (22). There are three temperature detection devices (3), which are respectively arranged on the curved surfaces at the upper, middle and lower positions of the stirring shaft (22).

8. The degreasing device according to claim 1, characterized in that: The temperature detection device (3) is a thermocouple.

9. The degreasing device according to claim 1, characterized in that: The heating device (4) is an electric heating coil.

10. The degreasing device according to claim 1, characterized in that: A cooling layer (7) is provided on the outside of the heat-insulating layer (5), and the cooling layer (7) is provided with a water outlet (71) and a water inlet (72) for cooling the degreasing tank.

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