Multi-atmosphere carbon tube furnace

Abstract

The utility model discloses a multi-atmosphere carbon tube furnace which comprises a furnace body, a hollow heating tube, a first water jacket, a second water jacket, a first water supply tube, a second water supply tube and a carbon black heat preservation layer. The middle of the hollow heating pipe is arranged in the furnace body, the two ends of the hollow heating pipe are exposed out of the furnace body, the first water jacket is arranged on the side wall of the furnace body, the second water jacket is arranged on the side wall of the end, exposed out of the furnace body, of the hollow heating pipe, and the carbon black heat preservation layer is arranged in the portion, between the hollow heating pipe and the first water jacket, of the furnace body. The first gas inlet pipe is used for conveying hydrogen to the carbon black insulating layer; the second gas inlet pipe is used for conveying nitrogen to the hollow heating pipe. Hydrogen is conveyed to the carbon black heat preservation layer, a reducing environment can be formed, and carbon black particles are prevented from being oxidized; and the second gas inlet pipe can convey nitrogen to the hollow heating pipe, so that the internal hard alloy material can react with the nitrogen to form a carbon nitrogen compound, the use performance of the hard alloy material is improved, and the requirements of different industrial fields for high-performance materials are met.

Description

Technical Field

[0001] The utility model relates to the field of carbon tube furnaces, in particular to a multi-atmosphere carbon tube furnace. Background Art

[0002] A carbon tube furnace is a high-temperature furnace that uses heating tubes made of graphite to heat materials. It is commonly used in metallurgy, cemented carbide, ceramic sintering, semiconductor manufacturing and other fields. When a carbon tube furnace needs to heat cemented carbide materials, the material to be heated is placed inside the carbon tube. After power is turned on, the graphite tube begins to heat up and evenly transfers heat to the cemented carbide material in the furnace through thermal radiation, heat conduction and other methods.

[0003] In the prior art, when a carbon tube furnace is heating cemented carbide materials, the graphite tube is prone to oxidation reaction at high temperature, resulting in thinning of the tube wall, which affects the service life and heating performance of the graphite tube. In addition, during the heating process, heat is easily dissipated outward through the furnace body, thereby increasing energy loss. Traditional insulation materials are prone to aging or decomposition in a long-term high-temperature environment, which reduces the insulation effect of the carbon tube furnace.

[0004] Therefore, the existing technology has defects and needs to be improved. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a multi-atmosphere carbon tube furnace with low cost, good heat preservation effect and the ability to prolong the service life of the equipment.

[0006] To achieve this purpose, the utility model adopts the following technical solutions: a multi-atmosphere carbon tube furnace, comprising a furnace body, a hollow heating tube, a first water jacket, a second water jacket, a first water supply pipe, a second water supply pipe and a carbon black insulation layer;

[0007] The middle portion of the hollow heating tube is arranged in the furnace body, and both ends of the hollow heating tube are exposed outside the furnace body. The hollow heating tube is used to accommodate and heat the cemented carbide material;

[0008] The first water jacket is provided on the side wall of the furnace body, the first water supply pipe is in communication with the first water jacket, and the first water supply pipe is used to transport cooling water to the first water jacket;

[0009] The second water jacket is provided on a side wall of one end of the hollow heating tube exposed to the furnace body, and the second water supply pipe is in communication with the second water jacket, and the second water supply pipe is used to transport cooling water to the second water jacket;

[0010] The carbon black insulation layer is provided in the furnace body between the hollow heating tube and the first water jacket, and the carbon black insulation layer is filled with carbon black particles to isolate the heat of the hollow heating tube from radiating outward;

[0011] The furnace body is provided with a first air inlet pipe, the first air inlet pipe is connected to the carbon black insulation layer, and the first air inlet pipe is used to transport hydrogen to the carbon black insulation layer;

[0012] A second air inlet pipe is provided on the portion of the hollow heating tube exposed outside the furnace body, and the second air inlet pipe is used to transport nitrogen toward the hollow heating tube.

[0013] By adopting the above technical solutions, in the multi-atmosphere carbon tube furnace, the number of the first water supply pipe and the number of the second water supply pipe are both two;

[0014] The two first water supply pipes are respectively arranged at the upper and lower ends of the first water jacket, and the two second water supply pipes are respectively arranged at the upper and lower ends of the second water jacket.

[0015] By adopting the above-mentioned technical solutions, in the multi-atmosphere carbon tube furnace, one of the first water supply pipes is connected to one of the second water supply pipes.

[0016] By adopting the above-mentioned technical solutions, in the multi-atmosphere carbon tube furnace, the first air inlet pipe and the second air inlet pipe are respectively provided with flow meters, and the flow meters are used to measure the gas delivery flow rate.

[0017] By adopting the above-mentioned technical solutions, in the multi-atmosphere carbon tube furnace, the first water supply pipe and the second water supply pipe are provided with ball valves, and the ball valves are used to control the delivery flow of cooling water.

[0018] By adopting the above technical solutions, in the multi-atmosphere carbon tube furnace, the hollow heating tube is made of graphite tube.

[0019] By adopting the above-mentioned technical solutions, in the multi-atmosphere carbon tube furnace, bearing seats are respectively provided at both ends of the furnace body, and the bearing seats are connected to the hollow heating tube sleeve.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The utility model provides a carbon black insulation layer between the hollow heating tube and the first water jacket, which can isolate the heat of the hollow heating tube from radiating outward, thereby improving the heating efficiency and reducing the operating cost of the equipment; by transporting hydrogen to the carbon black insulation layer, the oxygen around the carbon black insulation layer can be effectively consumed, forming a reducing environment, preventing the oxidation of carbon black particles, and maintaining the stability of its thermal insulation performance; the second air inlet pipe can transport nitrogen to the hollow heating tube, which not only prevents the hollow heating tube from contacting with oxygen and causing oxidation, but also extends the service life of the hollow heating tube; it can also cause the internal cemented carbide material to react with nitrogen to form carbonitride, thereby improving the performance of the cemented carbide material and meeting the needs of different industrial fields for high-performance materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification so as to facilitate understanding and reading by those familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size, without affecting the efficacy and objectives that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed in the present invention.

[0024] Figure 1 It is a schematic diagram of the cross-sectional structure of the present utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below 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 work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally located component.

[0027] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0028] like Figure 1As shown, the embodiment of the present invention provides a multi-atmosphere carbon tube furnace, including a furnace body 1, a hollow heating tube 2, a first water jacket 31, a second water jacket 32, a first water supply pipe 41, a second water supply pipe 42 and a carbon black insulation layer 5;

[0029] The middle part of the hollow heating tube 2 is arranged in the furnace body 1, and the two ends of the hollow heating tube 2 are exposed in the furnace body 1. The hollow heating tube 2 is used to accommodate and heat the cemented carbide material; the middle part of the hollow heating tube 2 is arranged in the furnace body 1, so that the heating area of the cemented carbide material can be concentrated in the furnace body 1, and the two ends of the hollow heating tube 2 are exposed in the furnace body 1, so that one end of the hollow heating tube 2 is convenient for feeding and the other end is convenient for discharging.

[0030] The first water jacket 31 is arranged on the side wall of the furnace body 1, and the first water supply pipe 41 is connected to the first water jacket 31. The first water supply pipe 41 is used to transport cooling water to the first water jacket 31; setting the first water jacket 31 on the side wall of the furnace body 1 and transporting cooling water through the first water supply pipe 41 can effectively take away the heat of the side wall of the furnace body 1, thereby forming a temperature gradient and preventing the furnace body 1 from overheating and affecting the structural strength and service life.

[0031] The second water jacket 32 is arranged on the side wall of one end of the hollow heating tube 2 exposed to the furnace body 1, and the second water supply pipe 42 is connected to the second water jacket 32. The second water supply pipe 42 is used to transport cooling water to the second water jacket 32. Such an arrangement can effectively reduce the temperature of the exposed part of the hollow heating tube 2 and prevent overheating from causing damage to the hollow heating tube 2 and other related components.

[0032] The carbon black insulation layer 5 is arranged in the furnace body 1 between the hollow heating tube 2 and the first water jacket 31. The carbon black insulation layer 5 is filled with carbon black particles to isolate the heat of the hollow heating tube from radiating outward; carbon black particles have excellent thermal insulation properties and can reduce the heat radiated outward from the hollow heating tube 2, thereby improving heating efficiency and reducing the operating cost of the equipment.

[0033] The furnace body 1 is provided with a first air inlet pipe 101, which is connected to the carbon black insulation layer 5. The first air inlet pipe 101 is used to transport hydrogen to the carbon black insulation layer 5; the carbon black insulation layer 5 is prone to oxidation reaction in a high temperature environment, especially in an oxygen-containing environment, thereby forming carbon dioxide or carbon monoxide, which not only leads to the consumption of carbon black particles, but also affects the insulation effect. By transporting hydrogen to the carbon black insulation layer 5, the oxygen around the carbon black insulation layer 5 can be effectively consumed, forming a reducing environment, preventing the oxidation of carbon black particles, and maintaining the stability of its thermal insulation performance.

[0034] A second air inlet pipe 201 is provided on the portion of the hollow heating tube 2 exposed from the furnace body 1. The second air inlet pipe 201 is used to supply nitrogen to the hollow heating tube 2. By supplying nitrogen to the hollow heating tube 2, an inert atmosphere is formed, preventing oxidation of the hollow heating tube 2 due to contact with oxygen, thereby extending the service life of the hollow heating tube 2. Furthermore, supplying nitrogen to the hollow heating tube 2 causes the cemented carbide material inside to react with the nitrogen to form carbonitride. Carbonitride has higher hardness and wear resistance than carbide, thereby improving the performance of the cemented carbide material and meeting the demand for high-performance materials in various industrial fields.

[0035] Furthermore, the number of the first water supply pipe 41 and the number of the second water supply pipe 42 are both two. The two first water supply pipes 41 are respectively arranged at the upper and lower ends of the first water jacket 31, and the two second water supply pipes 42 are respectively arranged at the upper and lower ends of the second water jacket 32. Such an arrangement can optimize the flow path of the cooling water, so that the cooling water can flow fully in the first water jacket 31 or the second water jacket 32, thereby improving the cooling efficiency.

[0036] Furthermore, one of the first water supply pipes 41 is connected to one of the second water supply pipes 42. Such an arrangement can form an associated water flow channel, so that the cooling water can flow evenly between the first water jacket 31 and the second water jacket 32, thereby improving the circulation efficiency of the cooling water.

[0037] Furthermore, a flow meter 61 is provided on each of the first air inlet pipe 101 and the second air inlet pipe 201 , and the flow meter 61 is used to measure the delivery flow of the gas.

[0038] Furthermore, a ball valve 62 is provided on the first water supply pipe 41 and the second water supply pipe 42 , and the ball valve 62 is used to control the delivery flow of cooling water.

[0039] Furthermore, the hollow heating tube 2 is made of graphite tube. Graphite tube not only has excellent thermal conductivity but also has a high melting point temperature, exceeding 3600°C, which allows the graphite tube to operate for a long time in extremely high temperature environments without melting or deformation, thereby extending the service life of the carbon tube furnace.

[0040] Furthermore, bearing seats 10 are provided at both ends of the furnace body 1, and the bearing seats 10 are sleeved and connected to the hollow heating tube 2. The provision of the bearing seats 10 not only facilitates precise alignment of the hollow heating tube 2 during installation, but also allows the hollow heating tube 2 to move freely when it expands due to heat, while reducing wear during movement.

[0041] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-atmosphere carbon tube furnace, characterized in that: It includes a furnace body, a hollow heating tube, a first water jacket, a second water jacket, a first water supply pipe, a second water supply pipe and a carbon black insulation layer; The middle portion of the hollow heating tube is arranged in the furnace body, and both ends of the hollow heating tube are exposed outside the furnace body. The hollow heating tube is used to accommodate and heat the cemented carbide material; The first water jacket is provided on the side wall of the furnace body, the first water supply pipe is in communication with the first water jacket, and the first water supply pipe is used to transport cooling water to the first water jacket; The second water jacket is provided on a side wall of one end of the hollow heating tube exposed to the furnace body, and the second water supply pipe is in communication with the second water jacket, and the second water supply pipe is used to transport cooling water to the second water jacket; The carbon black insulation layer is provided in the furnace body between the hollow heating tube and the first water jacket, and the carbon black insulation layer is filled with carbon black particles to isolate the heat of the hollow heating tube from radiating outward; The furnace body is provided with a first air inlet pipe, the first air inlet pipe is connected to the carbon black insulation layer, and the first air inlet pipe is used to transport hydrogen to the carbon black insulation layer; A second air inlet pipe is provided on the portion of the hollow heating tube exposed outside the furnace body, and the second air inlet pipe is used to transport nitrogen toward the hollow heating tube.

2. The multi-atmosphere carbon tube furnace according to claim 1, characterized in that: There are two first water supply pipes and two second water supply pipes; The two first water supply pipes are respectively arranged at the upper and lower ends of the first water jacket, and the two second water supply pipes are respectively arranged at the upper and lower ends of the second water jacket.

3. The multi-atmosphere carbon tube furnace according to claim 2, characterized in that: One of the first water supply pipes is communicated with one of the second water supply pipes.

4. The multi-atmosphere carbon tube furnace according to claim 1, characterized in that: The first air inlet pipe and the second air inlet pipe are respectively provided with a flow meter, and the flow meter is used to measure the delivery flow of the gas.

5. The multi-atmosphere carbon tube furnace according to claim 1, characterized in that: The first water supply pipe and the second water supply pipe are provided with ball valves, and the ball valves are used to control the delivery flow of cooling water.

6. The multi-atmosphere carbon tube furnace according to claim 1, characterized in that: The hollow heating tube is made of graphite tube.

7. The multi-atmosphere carbon tube furnace according to claim 1, characterized in that: Bearing seats are respectively provided at both ends of the furnace body, and the bearing seats are connected to the hollow heating tube sleeve.

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