Copper alloy powder sintering equipment based on CO atmosphere circulation

Abstract

The utility model relates to the technical field of copper alloy powder sintering, and discloses copper alloy powder sintering equipment based on CO atmosphere circulation, which comprises a vacuum powder sintering furnace and a CO storage tank, the vacuum powder sintering furnace and the CO storage tank are fixedly mounted through a main air inlet pipeline, and a circulation mechanism is arranged on the right side of the vacuum powder sintering furnace. And a waste heat utilization mechanism is arranged at the top of the vacuum powder sintering furnace. By means of multi-stage condensation-adsorption-catalysis collaborative purification, the utilization efficiency of CO gas is improved, the CO gas is recycled, the preparation cost is reduced, the CO gas is introduced from the bottom, airflow is forced to stir the atmosphere in the furnace, and the temperature gradient and component segregation are reduced; and heat preservation operation is conducted through the heat preservation cover, then heating operation is conducted through high-temperature waste gas exhausted from the interior of the first exhaust pipe, then waste heat of the waste gas is utilized, and the energy utilization rate is increased.

Description

Technical Field

[0001] This utility model relates to the field of copper alloy powder sintering technology, specifically to a copper alloy powder sintering equipment based on CO atmosphere circulation. Background Technology

[0002] Copper alloy powder metallurgy technology plays an irreplaceable role in fields such as electronic packaging, heat dissipation devices, and high-power laser mirrors due to its excellent electrical conductivity, thermal conductivity, and mechanical properties. In particular, copper-based alloys containing refractory metals such as chromium (Cr) and molybdenum (Mo) can be used to prepare functional materials with high reflectivity and high density by sintering powders in a vacuum sintering furnace.

[0003] Existing vacuum sintering furnaces generally use a CO atmosphere to suppress metal oxidation and mostly employ an open gas supply mode, where CO gas is directly discharged after flowing through the furnace once. However, CO gas is consumed in one go, with a utilization rate of less than 30%. Taking the typical Cu-Cr alloy sintering as an example, a single process requires approximately 50 m³ of CO gas with a purity of 99.9%, accounting for as much as 40% of the cost, resulting in serious gas waste. Therefore, it is necessary to improve the copper alloy powder sintering equipment based on CO atmosphere circulation to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a copper alloy powder sintering device based on CO atmosphere circulation to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a copper alloy powder sintering equipment based on CO atmosphere circulation, comprising a vacuum powder sintering furnace and a CO storage tank. The vacuum powder sintering furnace and the CO storage tank are fixedly installed together via a main air inlet pipe. A circulation mechanism is provided on the right side of the vacuum powder sintering furnace, and a waste heat utilization mechanism is provided on the top of the vacuum powder sintering furnace.

[0006] Preferably, the circulation mechanism includes an exhaust pipe one, which is fixedly installed on the top of the vacuum powder sintering furnace. A cyclone dust collector is fixedly installed on the right side of the exhaust pipe one. A condenser box is provided on the right side of the cyclone dust collector. A U-shaped condenser tube is provided inside the condenser box. A molecular sieve adsorption tower is fixedly installed on the right side of the U-shaped condenser tube. An exhaust pipe two is fixedly installed on the right side of the molecular sieve adsorption tower. A pressure relief valve is fixedly installed on the right side of the exhaust pipe two. An alkali neutralization tank is fixedly installed on the right side of the pressure relief valve through an emergency discharge pipe. A Roots vacuum pump is fixedly installed on the right side of the exhaust pipe two. An air inlet auxiliary pipe is fixedly installed at the bottom of the Roots vacuum pump.

[0007] Preferably, the left and right sides of the U-shaped condenser are fixedly installed to the cyclone dust collector and the molecular sieve adsorption tower respectively through connecting pipes.

[0008] Preferably, the intake manifold is wound around the outside of the exhaust manifold, and the end furthest from the Roots vacuum pump is fixedly installed with the main intake manifold.

[0009] Preferably, the waste heat utilization mechanism includes a water tank, which is located on top of the vacuum powder sintering furnace. A water pump is fixedly installed on the left side of the water tank, and a circulating water pipe is fixedly installed at the bottom of the water pump. An insulation cover is provided on the outside of the circulating water pipe, a vacuum layer is provided inside the insulation cover, and a heat insulation layer is provided inside the insulation cover.

[0010] Preferably, the water tank and the water pump are fixedly installed together by a connecting pipe, and the circulating water pipe is wrapped around the outside of the exhaust pipe, with the end away from the water pump being fixedly installed with the water tank.

[0011] Preferably, the heat insulation cover is provided in two sets, and is respectively located outside the position where the circulating water pipe and the air intake secondary pipe are wrapped around the exhaust pipe. The vacuum layer and the heat insulation layer are distributed from the inside to the outside.

[0012] Compared with the prior art, this utility model provides a copper alloy powder sintering equipment based on CO atmosphere circulation, which has the following beneficial effects:

[0013] 1. This copper alloy powder sintering equipment based on CO atmosphere circulation improves the utilization efficiency of CO gas through multi-stage condensation-adsorption-catalysis synergistic purification during use, recycles CO gas, reduces preparation costs, and introduces CO gas from the bottom to force airflow to agitate the atmosphere inside the furnace, reducing temperature gradient and component segregation.

[0014] 2. In the CO atmosphere circulation-based copper alloy powder sintering equipment, during use, because the circulating water pipe and the air inlet auxiliary pipe are both wrapped around the outside of the exhaust pipe and are kept warm by the heat insulation cover, the high-temperature exhaust gas discharged from the inside of the exhaust pipe can be used for heating, thereby utilizing the waste heat of the exhaust gas and increasing the energy utilization rate. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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.

[0016] Figure 1 This is a schematic diagram of the appearance and structure of this utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the circulation mechanism of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the heat insulation cover of this utility model.

[0019] In the diagram: 1. Vacuum powder sintering furnace; 2. Circulation mechanism; 21. Exhaust pipe one; 22. Cyclone dust collector; 23. Condensation box; 24. U-shaped condenser tube; 25. Molecular sieve adsorption tower; 26. Exhaust pipe two; 27. Pressure relief valve; 28. Alkali neutralization tank; 29. ​​Roots vacuum pump; 210. Inlet auxiliary pipe; 3. Waste heat utilization mechanism; 31. Water tank; 32. Water pump; 33. Circulating water pipe; 34. Insulation cover; 35. Vacuum layer; 36. Insulation layer; 4. CO storage tank; 5. Main intake pipe. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Example 1:

[0023] Please see Figure 1-3 This utility model provides a technical solution: a copper alloy powder sintering equipment based on CO atmosphere circulation, including a vacuum powder sintering furnace 1 and a CO storage tank 4. The vacuum powder sintering furnace 1 and the CO storage tank 4 are fixedly installed through a main air inlet pipe 5. A circulation mechanism 2 is provided on the right side of the vacuum powder sintering furnace 1, and a waste heat utilization mechanism 3 is provided on the top of the vacuum powder sintering furnace 1.

[0024] Furthermore, the circulation mechanism 2 includes an exhaust pipe 21, which is fixedly installed on the top of the vacuum powder sintering furnace 1. A cyclone dust collector 22 is fixedly installed on the right side of the exhaust pipe 21. A condenser box 23 is installed on the right side of the cyclone dust collector 22. A U-shaped condenser tube 24 is installed inside the condenser box 23. A molecular sieve adsorption tower 25 is fixedly installed on the right side of the U-shaped condenser tube 24. An exhaust pipe 26 is fixedly installed on the right side of the molecular sieve adsorption tower 25. A pressure relief valve 27 is fixedly installed on the right side of the exhaust pipe 26. An alkaline neutralization tank 28 is fixedly installed on the pressure relief valve 27 through an emergency discharge pipe. A Roots vacuum pump 29 is fixedly installed on the right side of the exhaust pipe 26. An inlet auxiliary pipe 210 is fixedly installed at the bottom of the Roots vacuum pump 29. Through multi-stage condensation-adsorption-catalysis synergistic purification, the utilization efficiency of CO gas is improved, CO gas is recycled, and the preparation cost is reduced.

[0025] It should be noted that the Roots vacuum pump 29 is a dry oil-free Roots pump such as (Leybold RUVACWH2500), the condenser 23 is filled with -40℃ ethanol coolant, and the pressure relief valve 27 is set to a pressure of +150kPa.

[0026] Furthermore, the left and right sides of the U-shaped condenser 24 are fixedly installed to the cyclone dust collector 22 and the molecular sieve adsorption tower 25 respectively through connecting pipes, which reduces the content of dust, CO2 and water in the circulating CO gas and increases the purity of the circulating CO gas.

[0027] Furthermore, the intake manifold 210 is wrapped around the outside of the exhaust manifold 21, and the end away from the Roots vacuum pump 29 is fixedly installed with the main intake pipe 5 to preheat the CO inside the intake manifold 210, thereby reducing the heating time inside the vacuum powder sintering furnace 1 and thus reducing energy consumption.

[0028] Example 2:

[0029] Please see Figure 2 Furthermore, in conjunction with Embodiment 1, it is further found that the waste heat utilization mechanism 3 includes a water tank 31, which is installed on the top of the vacuum powder sintering furnace 1. A water pump 32 is fixedly installed on the left side of the water tank 31, and a circulating water pipe 33 is fixedly installed at the bottom of the water pump 32. An insulation cover 34 is provided on the outside of the circulating water pipe 33, a vacuum layer 35 is provided inside the insulation cover 34, and a heat insulation layer 36 is provided inside the insulation cover 34. This allows the high-temperature exhaust gas discharged from the exhaust pipe 21 to be used for heating, thereby utilizing the waste heat of the exhaust gas and increasing the energy utilization rate.

[0030] Furthermore, the water tank 31 and the water pump 32 are fixedly installed together by a connecting pipe. The circulating water pipe 33 is wrapped around the outside of the exhaust pipe 21, and the end away from the water pump 32 is fixedly installed with the water tank 31 to use waste heat to heat the water, thereby increasing the energy utilization rate.

[0031] Furthermore, two sets of heat insulation covers 34 are provided, and are respectively set on the outside of the position where the circulating water pipe 33 and the air intake secondary pipe 210 are wrapped around the exhaust pipe 21. The vacuum layer 35 and the heat insulation layer 36 are distributed from the inside to the outside. The heat insulation cover 34 is used for heat preservation, thereby reducing heat loss during the preheating process.

[0032] In actual operation, when this device is used, before placing the material inside the vacuum powder sintering furnace 1, a trace amount of activated carbon powder and metal powder are uniformly mixed by the discharge screw. Utilizing the adsorption and reduction properties of activated carbon, deoxidation and oxidation inhibition are simultaneously achieved during subsequent CO atmosphere sintering. After being placed inside the vacuum powder sintering furnace 1, the main inlet pipe 5 introduces CO from the CO storage tank 4 into the vacuum powder sintering furnace 1. During the sintering process, exhaust gas is discharged through the exhaust pipe 21 and enters the cyclone dust collector 22 for dust removal. The dust-removed exhaust gas then enters the U-shaped condenser 24 for condensation. After condensation, it enters the molecular sieve adsorption tower 25 to remove CO2 and water. The CO is then transported to the main inlet pipe 5 by the Roots vacuum pump 29, and then to the vacuum powder sintering furnace 1 to complete the CO circulation operation. If the pressure exceeds 150 kPa during the exhaust process, the pressure relief valve 27 automatically opens to release the pressure, and the gas is discharged into the alkaline neutralization tank 28 through the emergency discharge pipe.

[0033] The water pump 32 draws water from the water tank 31 into the circulating water pipe 33. Since the circulating water pipe 33 is wrapped around the outside of the exhaust pipe 21, the water inside the circulating water pipe 33 is heated, thereby completing the waste heat utilization operation.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A copper alloy powder sintering apparatus based on CO atmosphere circulation, comprising a vacuum powder sintering furnace (1) and a CO storage tank (4), characterized in that: The vacuum powder sintering furnace (1) and the CO storage tank (4) are fixedly installed through the main air inlet pipeline (5), the right side of the vacuum powder sintering furnace (1) is provided with a circulating mechanism (2), and the top of the vacuum powder sintering furnace (1) is provided with a waste heat utilization mechanism (3).

2. The copper alloy powder sintering apparatus based on CO atmosphere circulation according to claim 1, characterized by: The circulating mechanism (2) comprises an exhaust pipe one (21), the exhaust pipe one (21) is fixedly installed at the top of the vacuum powder sintering furnace (1), a cyclone dust collector (22) is fixedly installed at the right side of the exhaust pipe one (21), a condensation tank (23) is arranged at the right side of the cyclone dust collector (22), a U-shaped condensation pipe (24) is arranged in the condensation tank (23), a molecular sieve adsorption tower (25) is fixedly installed at the right side of the U-shaped condensation pipe (24), an exhaust pipe two (26) is fixedly installed at the right side of the molecular sieve adsorption tower (25), a pressure relief valve (27) is fixedly installed at the right side of the exhaust pipe two (26), an alkali neutralization tank (28) is fixedly installed on the pressure relief valve (27) through an emergency exhaust pipe, and a Roots vacuum pump (29) is fixedly installed at the right side of the exhaust pipe two (26).

3. The copper alloy powder sintering apparatus based on CO atmosphere circulation according to claim 2, characterized by: The left and right sides of the U-shaped condensation pipe (24) are fixedly installed with the cyclone dust collector (22) and the molecular sieve adsorption tower (25) through connecting pipes.

4. The copper alloy powder sintering apparatus based on CO atmosphere circulation according to claim 2, characterized by: The air inlet auxiliary pipeline (210) is wound outside the exhaust pipe one (21), and the end, away from the Roots vacuum pump (29), is fixedly installed with the main air inlet pipeline (5).

5. The copper alloy powder sintering apparatus based on CO atmosphere circulation according to claim 2, characterized by: The waste heat utilization mechanism (3) comprises a water tank (31), the water tank (31) is arranged at the top of the vacuum powder sintering furnace (1), a water pump (32) is fixedly installed at the left side of the water tank (31), a circulating water pipe (33) is fixedly installed at the bottom of the water pump (32), a heat preservation cover (34) is arranged outside the circulating water pipe (33), a vacuum layer (35) is arranged in the heat preservation cover (34), and a heat insulation layer (36) is arranged in the heat preservation cover (34).

6. The copper alloy powder sintering apparatus based on CO atmosphere circulation according to claim 5, characterized by: The water tank (31) and the water pump (32) are fixedly installed through connecting pipes, the circulating water pipe (33) is wound outside the exhaust pipe one (21), and the end, away from the water pump (32), is fixedly installed with the water tank (31).

7. The copper alloy powder sintering apparatus based on CO atmosphere circulation according to claim 5, characterized by: The heat preservation cover (34) is provided with two groups, and is arranged outside the positions, where the circulating water pipe (33) and the air inlet auxiliary pipeline (210) are wound on the exhaust pipe one (21), and the vacuum layer (35) and the heat insulation layer (36) are distributed from inside to outside.

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