Rapid cooling and anti-oxidation device for graphitized graphite crucible

Abstract

The utility model relates to the technical field of graphite crucibles, in particular to a rapid cooling and anti-oxidation device for a graphitized graphite crucible. Comprising a workshop, a cooling chamber and a nitrogen making chamber, the nitrogen making chamber is connected with an air inlet pipe and connected with the cooling chamber through a pipeline, ventilation pipelines are arranged on the two sides of the workshop and communicated with the workshop, the cooling chamber is communicated with the ventilation pipelines on the two sides through an air supply pipeline, and an exhaust system is arranged at the top of the workshop. According to the device, the graphite crucible in a workshop can be efficiently cooled by utilizing nitrogen in air, and the treated waste gas is properly treated, so that the crucible is prevented from being oxidized, and the rejection rate of the crucible is reduced. The cooling device is mainly applied to cooling and anti-oxidation aspects of the graphite crucible.

Description

Technical Field

[0001] The utility model relates to the technical field of graphite crucibles, and more specifically to a device for rapidly cooling and anti-oxidation a graphite crucible after graphitization. Background Art

[0002] The graphite crucible taken out of the furnace after graphitization has a high temperature of 500-700 degrees Celsius. The most commonly used method now is to place it in the air to cool naturally to room temperature after heating before subsequent operations. The air cooling process often takes a long time, seriously affecting the construction period and low production efficiency;

[0003] At the same time, due to various reasons during the placement process, the product in the crucible is easily exposed to air and oxidized, resulting in an increase in the scrap rate. In addition, the high-temperature crucible placed in the workshop requires centralized supervision, which not only increases manpower and material resources, but also easily causes safety hazards. Utility Model Content

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the utility model provides a device for rapid cooling and anti-oxidation of graphite crucible after graphitization. The device can protect the product from oxidation reaction, reduce the scrap rate, and is very cheap, thus improving production benefits and greatly improving the production efficiency of enterprises.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A device for rapid cooling and anti-oxidation of a graphite crucible after graphitization, comprising a workshop, a cooling chamber and a nitrogen making chamber, wherein the nitrogen making chamber is connected to an air inlet pipe, the nitrogen making chamber is connected to the cooling chamber through a pipeline, ventilation ducts are arranged on both sides of the workshop, the ventilation ducts are connected to the workshop, the cooling chamber is connected to the ventilation ducts on both sides through an air supply duct, and an exhaust system is arranged on the top of the workshop.

[0007] The workshop is provided with crucible passage openings on both the front and rear sides.

[0008] Ventilation holes are arranged on both sides of the workshop, and the ventilation duct is connected with the interior of the workshop through the ventilating holes.

[0009] The exhaust system includes an air outlet main pipe and an air pump. The air pumps are provided in multiple groups. The multiple groups of air pumps are arranged on the top of the workshop. The bottom of the air pump is connected to the inside of the workshop. The top of the air pump is connected to an air outlet branch pipe, and each air outlet branch pipe is connected to the air outlet main pipe.

[0010] One end of the gas outlet main pipe is closed, and the other end is connected to a waste gas collecting box.

[0011] An observation hole is arranged on the top of the waste gas collecting box.

[0012] The waste gas collecting box is connected with an impurity removal device through a pipeline.

[0013] The impurity removal device is connected with the nitrogen production chamber through a pipeline.

[0014] A guide rail is arranged in the workshop, and two ends of the guide rail are respectively connected with crucibles at two sides through openings. The guide rail is arranged in an S shape in the workshop, and an electric roller is installed on the guide rail.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The low-temperature guide rails arranged in an S shape are arranged relatively close as a whole, which reduces the floor space and increases the length of the guide rails, increases the cooling time inside the workshop, ensures the sufficient cooling of the crucible and the products in the crucible, and ensures the personal safety of the operators. Through the nitrogen making room and the cooling room, the nitrogen in the air can be quickly extracted, converted to a suitable temperature, and then introduced into the workshop for use as cooling gas, which is safe and efficient; the gas in the workshop is discharged through the air pump, the outlet branch pipe and the outlet main pipe, and the waste gas that expands on the top of the workshop due to heat is promptly removed; the observation hole can be used to discharge the waste gas, or it can be blocked and only used to observe the waste gas status; the impurity removal device can treat the discharged waste gas before discharging it, or it can be transported to the nitrogen making room for recycling the gas; this device can use the nitrogen in the air to efficiently cool the graphite crucible in the workshop, and properly treat the treated waste gas, avoiding the oxidation of the crucible and reducing the scrap rate of the crucible. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the utility model from another angle;

[0019] Figure 3 A schematic diagram of the ventilation holes of the utility model;

[0020] Figure 4 It is a schematic diagram of the guide rail part of the utility model;

[0021] Figure 5 This is a schematic diagram of the transportation of the crucible of the utility model on the guide rail;

[0022] Figure 6 This is a schematic diagram of the interior of the exhaust system of the utility model;

[0023] In the figure: 1 is a de-impurity device, 2 is a crucible through port, 3 is an exhaust gas collecting box, 4 is an observation hole, 5 is an air outlet main pipe, 6 is an air outlet branch pipe, 7 is an air pump, 8 is a ventilation duct, 9 is a workshop, 10 is an air supply duct, 11 is a cooling room, 12 is a nitrogen making room, 13 is an air inlet pipe, 14 is an air vent, 15 is a guide rail, and 16 is an electric roller. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0026] like Figures 1 to 6 As shown, a device for rapid cooling and anti-oxidation of graphite crucible after graphitization is characterized in that it includes a workshop 9, a cooling chamber 11 and a nitrogen making chamber 12, the nitrogen making chamber 12 is connected to an air inlet pipe 13, the nitrogen making chamber 12 is connected to the cooling chamber 11 through a pipeline, ventilation ducts 8 are arranged on both sides of the workshop 9, the ventilation ducts 8 are connected to the workshop 9, the cooling chamber 11 is connected to the ventilation ducts 8 on both sides through an air supply pipe 10, the cooling chamber is connected to the ventilation ducts on both sides through a three-way pipe, and gas is transported to the ventilation ducts 8, and an exhaust system is arranged on the top of the workshop 9. The graphite crucible is sent into the workshop 9, the nitrogen making chamber 12 inhales air through the air inlet pipe 13, compresses the air, and according to the principle that the liquefaction points of various components in the air are different, nitrogen can be extracted through compression cooling, and the nitrogen enters the cooling chamber 11, and its temperature is adjusted to 10°C, and then the nitrogen is transported to the two ventilation ducts 8 through the air supply pipe 10, so as to cool down and prevent oxidation of the crucible in the workshop.

[0027] Preferably, both the front and rear sides of the workshop 9 are provided with a crucible through-port 2. The crucible to be processed enters or is sent out of the workshop 9 through the crucible through-port 2. A closing plate is provided on the crucible through-port 2. When necessary, the closing plate can be closed to block the crucible through-port 2.

[0028] Preferably, vents 14 are provided on both sides of the workshop 9, and the ventilation duct 8 is connected to the interior of the workshop 9 through the vents 14. The vents 14 are provided on the side walls of the workshop, and cooling gas passes through the vents 14 and enters the workshop 9 from the ventilation duct 8 to cool the crucible in the workshop 9.

[0029] Preferably, the exhaust system includes an air outlet main pipe 5 and an air pump 7. The air pump 7 is provided with multiple groups. The multiple groups of air pumps 7 are arranged on the top of the workshop 9. The multiple groups of air pumps 7 are arranged in a straight line. The bottom of the air pump 7 is connected to the inside of the workshop 9. The top of the air pump 7 is connected to an air outlet branch pipe 6, and each air outlet branch pipe 6 is connected to the air outlet main pipe 5. Through the air pump 7, the gas in the workshop 9 is sucked out through the air outlet branch pipe 6 and the air outlet main pipe 5. The air is sucked out to reduce the possibility of oxidation reaction caused by the product contacting with oxygen, and the waste gas at the top of the workshop 9 after heat expansion is sucked out.

[0030] Preferably, one end of the gas outlet main pipe 5 is closed, and the other end is connected to the waste gas collecting box 3. The waste gas flows into the waste gas collecting box 3 and is discharged.

[0031] Preferably, an observation hole 4 is provided on the top of the waste gas collection box 3. The observation window 4 is an open structure. When the observation window 4 is opened, the waste gas can be directly discharged from here. If the observation window 4 is closed, the waste gas in the waste gas collection box 3 can be observed through the transparent plastic plate on the observation window 4.

[0032] Preferably, the waste gas collection box 3 is connected to the impurity removal device 1 through a pipeline. If the waste gas is not discharged directly, it will be transported to the impurity removal device 1, and after being processed by the impurity removal device 1, the purified waste gas will be discharged into the air.

[0033] Preferably, the impurity removal device 1 is connected to the nitrogen making chamber 12 through a pipeline. The waste gas after impurity removal can also be selected not to be discharged, and enters the cooling chamber 11 for treatment after passing through the nitrogen making chamber 12 again, so as to realize the recycling of gas.

[0034] Preferably, a guide rail 15 is provided in the workshop, and the two ends of the guide rail 15 are respectively connected to the crucibles on both sides through the opening 2. The guide rail 15 is arranged in an S shape in the workshop 9, and an electric roller 16 is installed on the guide rail 15. Driven by the motor, the electric roller 16 rotates, and the friction between the electric roller 16 and the graphite crucible causes the crucible to run along the guide rail 15. The low-temperature guide rail 15 is arranged relatively close as a whole, which reduces the floor space and increases the length of the guide rail 15, thereby increasing the cooling time inside the workshop 9, ensuring sufficient cooling of the crucible and the product in the crucible, and ensuring the personal safety of the operator. The straight part of the guide rail 15 is a cylindrical electric roller 16 with a moderate diameter, and the electric roller 16 at the turning part is a truncated cone with a small taper, which ensures the smooth transmission of the crucible on the guide rail 15.

[0035] When in use, start the air pump 7, and pause after discharging the high-temperature exhaust gas in the workshop 9, start the nitrogen making chamber 12 and the cooling chamber 11, and transport the prepared nitrogen to the ventilation duct 8 and the workshop 9. The finished nitrogen can also be directly connected to the cooling chamber 11, and used directly after temperature control. Nitrogen is an inert gas, which protects the product from oxidation reaction, reduces the scrap rate, and the cost of producing nitrogen is very cheap, which improves production efficiency. The heated graphite crucible is placed on the guide rail 15 through the crucible through the port 2, and the electric roller 16 on the guide rail 15 is started. During the S-shaped route transportation of the crucible, the crucible is cooled and cooled at the same time. The air pump 7 is started, and the high-temperature exhaust gas is extracted at a low speed, transported to the impurity removal device 1, and then transported back to the cooling chamber 11, and re-participated in the cooling cycle. Finally, the cooled graphite crucible is removed and the product is collected.

[0036] Only the preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention, and various changes should be included in the protection scope of the present invention.

Claims

1. A device for rapid cooling and anti-oxidation of graphite crucible after graphitization, characterized in that: The invention comprises a workshop (9), a cooling chamber (11) and a nitrogen production chamber (12), wherein the nitrogen production chamber (12) is connected to an air inlet pipe (13), the nitrogen production chamber (12) and the cooling chamber (11) are connected via a pipeline, ventilation ducts (8) are arranged on both sides of the workshop (9), the ventilation ducts (8) are connected to the workshop (9), the cooling chamber (11) is connected to the ventilation ducts (8) on both sides via an air supply duct (10), and an exhaust system is arranged on the top of the workshop (9).

2. The device for rapid cooling and anti-oxidation of a graphite crucible after graphitization according to claim 1, characterized in that: The workshop (9) is provided with crucible passage openings (2) on both the front and rear sides.

3. The device for rapid cooling and anti-oxidation of a graphite crucible after graphitization according to claim 1, characterized in that: Ventilation holes (14) are provided on both sides of the workshop (9), and the ventilation duct (8) is connected to the interior of the workshop (9) through the ventilating holes (14).

4. The device for rapid cooling and anti-oxidation of a graphite crucible after graphitization according to claim 1, characterized in that: The exhaust system comprises an air outlet main pipe (5) and an air pump (7). The air pump (7) is provided in multiple groups. The multiple groups of air pumps (7) are arranged on the top of the workshop (9). The bottom of the air pump (7) is connected to the inside of the workshop (9). The top of the air pump (7) is connected to an air outlet branch pipe (6), and each air outlet branch pipe (6) is connected to the air outlet main pipe (5).

5. The device for rapid cooling and anti-oxidation of a graphite crucible after graphitization according to claim 4, characterized in that: One end of the gas outlet main pipe (5) is closed, and the other end is connected to the waste gas collection box (3).

6. The device for rapid cooling and anti-oxidation of a graphite crucible after graphitization according to claim 5, characterized in that: The top of the waste gas collection box (3) is provided with an observation hole (4).

7. The device for rapid cooling and anti-oxidation of a graphite crucible after graphitization according to claim 5, characterized in that: The waste gas collection box (3) is connected to the impurity removal device (1) via a pipeline.

8. The device for rapid cooling and anti-oxidation of a graphite crucible after graphitization according to claim 7, characterized in that: The impurity removal device (1) is connected to the nitrogen production chamber (12) via a pipeline.

9. The device for rapid cooling and anti-oxidation of a graphite crucible after graphitization according to claim 1, characterized in that: A guide rail (15) is provided in the workshop, and both ends of the guide rail (15) are respectively connected to the crucibles at both sides through the openings (2). The guide rail (15) is arranged in an S shape in the workshop (9), and an electric roller (16) is installed on the guide rail (15).

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