Intelligent annealing furnace for stainless steel pipe

Abstract

The utility model provides an intelligent annealing furnace for a stainless steel pipe, which comprises a water vapor removing furnace and an induction type annealing furnace, and a steel belt conveying mechanism I and a steel belt conveying mechanism II are respectively arranged in the water vapor removing furnace and the induction type annealing furnace; a cavity I and a cavity II which are the same as the shells of the water vapor removal furnace and the induction type annealing furnace in shape are formed in the shells of the water vapor removal furnace and the induction type annealing furnace respectively; through the overall arrangement, whether water vapor exists on the surface of the stainless steel pipe or not can be automatically sensed, the water vapor on the surface of the stainless steel pipe is removed through heat in waste gas generated by annealing of the induction type annealing furnace, and the stainless steel pipe is preheated, so that the annealing efficiency of the stainless steel pipe can be improved; and the heat in the waste gas can be fully utilized, so that the heat waste is reduced, and the energy consumption of the induction type annealing furnace is saved.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel pipe processing, and in particular to an intelligent annealing furnace for stainless steel pipes. Background Technology

[0002] Annealing of steel pipes is a heat treatment method in which steel pipes are heated to a temperature at which a phase transformation or partial phase transformation occurs, held at that temperature, and then slowly cooled. The purpose of annealing is to eliminate structural defects, improve the microstructure to homogenize the composition and refine the grains, improve the mechanical properties of the steel, and reduce residual stress; at the same time, it can reduce hardness, improve plasticity and toughness, and improve machinability.

[0003] However, in existing intelligent annealing furnaces for stainless steel pipes, the heat in the exhaust gas generated during annealing is not easily utilized, resulting in unnecessary heat waste.

[0004] Therefore, it is essential to invent an intelligent annealing furnace for stainless steel pipes. Utility Model Content

[0005] To solve the above-mentioned technical problems, the present invention provides a technical solution for an intelligent annealing furnace for stainless steel pipes: an intelligent annealing furnace for stainless steel pipes, comprising a water vapor removal furnace and an induction annealing furnace, wherein: a steel belt conveying mechanism one and a steel belt conveying mechanism two are respectively installed inside the water vapor removal furnace and the induction annealing furnace, and cavities one and two of the same shape are respectively opened on the shells of the water vapor removal furnace and the induction annealing furnace;

[0006] The induction annealing furnace is equipped with a waste gas processor and an external exhaust pipe. The inlet end of the waste gas processor is connected to the inside of the induction annealing furnace, the outlet end of the waste gas processor is fixedly connected to one end of the second pipe, the other end of the second pipe is fixedly connected to the outlet end of the water vapor removal furnace, and the second pipe is connected to the inside of the cavity.

[0007] The induction annealing furnace is equipped with a temperature sensor.

[0008] The external discharge pipe is connected to the interior of cavity two, and the external discharge pipe is located on the side near the discharge port of the induction annealing furnace.

[0009] The inlet side of the water vapor removal furnace is fixedly connected to the inlet side of the induction annealing furnace through a pipe, and the pipe is connected to the interior of cavity one and cavity two.

[0010] A water vapor sensor is installed on the inlet side of the water vapor removal furnace;

[0011] A hot air system is fixedly installed on the water vapor removal furnace;

[0012] A control console is provided on one side of the induction annealing furnace. The controller inside the control console is electrically connected to the induction annealing furnace, the waste gas processor, the temperature sensor, the water vapor sensor, and the hot air system.

[0013] Each of the cavities has a number of fins evenly arranged in cavity one and cavity two.

[0014] The water vapor removal furnace has a through hole at the top, which is connected to the interior of the water vapor removal furnace but not connected to the interior of the cavity. The through hole is located below the hot air system and is fixedly connected to the air outlet of the hot air system.

[0015] Several microchannel tubes are uniformly fixed inside the through hole, and the microchannel tubes are connected to the interior of the cavity.

[0016] The hot air system includes a housing, a hot air blower, and a regular blower. The hot air blower and the regular blower are fixedly installed on the water vapor removal furnace through the housing. The housing covers the through hole, and the housing and the through hole are sealed. The air outlets of the hot air blower and the regular blower are connected to the through hole.

[0017] An atmosphere controller is provided on one side of the induction annealing furnace. The atmosphere controller is connected to the inside of the induction annealing furnace through an atmosphere delivery pipe. The atmosphere delivery pipe is electrically connected to the controller inside the control console.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] The overall design of this utility model can automatically sense whether there is moisture on the surface of the stainless steel tube, and use the heat in the exhaust gas generated by the induction annealing furnace to remove the moisture from the surface of the stainless steel tube and preheat the stainless steel tube. In this way, not only can the annealing efficiency of the stainless steel tube be improved, but the heat in the exhaust gas can also be fully utilized, reducing heat waste and saving energy consumption of the induction annealing furnace. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of cavity one and cavity two of this utility model.

[0022] Figure 3 This is a schematic diagram of the hot air system and through-hole structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the control principle of this utility model.

[0024] In the picture:

[0025] 1. Water vapor removal furnace; 2. Induction annealing furnace; 3. Steel belt conveyor mechanism one; 4. Steel belt conveyor mechanism two; 5. Cavity one; 6. Cavity two; 7. Pipe one; 8. Waste gas processor; 9. Pipe two; 10. External exhaust pipe; 11. Through hole; 12. Microchannel tube; 13. Shell; 13. Hot air blower; 13. Ordinary blower; 13. Water vapor sensor; 14. Atmosphere controller; 15. Atmosphere delivery pipe; 16. Control console; 17. Fins; 18. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0027] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] Example

[0030] Reference Figure 1-4 The intelligent annealing furnace for stainless steel pipes includes a water vapor removal furnace 1 and an induction annealing furnace 2. The water vapor removal furnace 1 and the induction annealing furnace 2 are respectively equipped with a steel belt conveyor mechanism 3 and a steel belt conveyor mechanism 4 to convey the stainless steel pipes. The shells of the water vapor removal furnace 1 and the induction annealing furnace 2 are respectively provided with cavities 5 and 6 of the same shape to exchange heat with the treated annealing exhaust gas through cavities 5 and 6.

[0031] Specifically, the heating components inside the induction annealing furnace 2 adopt existing technologies, such as high-frequency induction heating technology in the prior art;

[0032] The induction annealing furnace 2 is equipped with a waste gas processor 8 and an external discharge pipe 10. The inlet end of the waste gas processor 8 is connected to the inside of the induction annealing furnace 2, and the outlet end of the waste gas processor 8 is fixedly connected to one end of the second pipe 9. The other end of the second pipe 9 is fixedly connected to the discharge end of the water vapor removal furnace 1. The second pipe 9 is connected to the inside of the first cavity 5 so that the waste gas inside the induction annealing furnace 2 is processed by the waste gas processor 8 and then discharged into the first cavity 5 through the external discharge pipe 10, thereby heating the water vapor removal furnace 1.

[0033] Specifically, the exhaust gas processor 8 adopts existing technologies, such as catalytic oxidation exhaust gas processors, high-temperature incineration processors, and activated carbon adsorption processors.

[0034] The induction annealing furnace 2 is equipped with a temperature sensor, such as a high-precision temperature measuring device like an infrared thermometer, to collect the temperature data inside the induction annealing furnace 2 in real time.

[0035] The external discharge pipe 10 is connected to the interior of cavity 2 6. The external discharge pipe 10 is located on the side near the discharge port of the induction annealing furnace 2 so that the exhaust gas after heat exchange between cavity 1 5 and cavity 2 6 can be discharged through the external discharge pipe 10.

[0036] The inlet side of the water vapor removal furnace 1 is fixedly connected to the inlet side of the induction annealing furnace 2 through pipe 1 7. Pipe 1 7 is connected to the interior of cavity 1 5 and cavity 2 6 so that the exhaust gas generated during annealing first enters cavity 1 5 for heat exchange, and then enters cavity 2 6 from the interior of cavity 1 5 through pipe 1 7 to continue heat exchange and keep the induction annealing furnace 2 warm.

[0037] A water vapor sensor 14, specifically an AHS01IB water vapor sensor, is installed on the inlet side of the water vapor removal furnace 1 so as to detect whether there is water vapor on the surface of the stainless steel pipe.

[0038] A hot air system is fixedly installed on the water vapor removal furnace 1 so that when the water vapor sensor 14 detects water vapor on the surface of the stainless steel pipe, the hot air system is activated to dry the water vapor on the surface of the stainless steel pipe.

[0039] and;

[0040] A control panel 17 is provided on one side of the induction annealing furnace 2. The controller of the control panel 17 is a PLC controller.

[0041] The induction annealing furnace 2, the exhaust gas processor 8, and the hot air system are connected to the output terminal of the PLC controller, while the temperature sensor and the water vapor sensor 14 are connected to the input terminal of the PLC controller.

[0042] In this embodiment, several fins 18 are uniformly arranged in both cavity 5 and cavity 6 to increase the heat exchange area with the exhaust gas.

[0043] In this embodiment, a through hole 11 is provided above the water vapor removal furnace 1. The through hole 11 is connected to the interior of the water vapor removal furnace 1, but not connected to the interior of the cavity 5. The through hole 11 is located below the hot air system and is fixedly connected to the air outlet of the hot air system so that the hot air system can deliver hot air to the interior of the water vapor removal furnace 1 through the through hole 11.

[0044] In this embodiment, several microchannel tubes 12 are uniformly fixedly installed inside the through hole 11. The microchannel tubes 12 are connected to the cavity 5 so that after the induction annealing furnace 2 has been running for a period of time, the hot air blower 131 does not need to be started. Instead, the ordinary blower 132 is started to blow the heat obtained by the heat exchange between the microchannel tubes 12 and the exhaust gas into the water vapor removal furnace 1, thereby removing and preheating the water vapor on the surface of the stainless steel tube, thus saving the energy consumption of the hot air system.

[0045] In this embodiment, the hot air system includes a housing 13, a hot air blower 131, and a regular blower 132. The hot air blower 131 and the regular blower 132 are fixedly installed on the water vapor removal furnace 1 through the housing 13. The housing 13 covers the through hole 11, and the housing 13 and the through hole 11 are sealed. The air outlets of the hot air blower 131 and the regular blower 132 are connected to the through hole 11. This is so that when the induction annealing furnace 2 is first started, there is no waste gas available, and the water vapor on the surface of the stainless steel pipe can be directly dried by the hot air blower 131.

[0046] In this embodiment, an atmosphere controller 15 is provided on one side of the induction annealing furnace 2. The atmosphere controller 15 is connected to the inside of the induction annealing furnace 2 through an atmosphere delivery pipe 16. The atmosphere delivery pipe 16 is electrically connected to the output terminal of the controller inside the control console 17.

[0047] Specifically, oxygen, nitrogen, and other gases can be added to the induction annealing furnace 2 through the atmosphere controller 15.

[0048] Specifically, during use, when the stainless steel pipe enters from the inlet of the steam removal furnace 1, the steam sensor 14 will detect whether there is steam on the surface of the stainless steel pipe.

[0049] When the moisture sensor 14 detects moisture on the surface of the stainless steel tube, if the induction annealing furnace 2 has just started running, the hot air blower 131 will start and the hot air blown out by the hot air blower 131 will directly dry the moisture on the surface of the stainless steel tube.

[0050] If the induction annealing furnace 2 has been running for a period of time, the ordinary fan 132 will be started. Since the exhaust gas after being treated by the exhaust gas processor 8 will be discharged into the cavity 5 through the exhaust pipe 10, the water vapor removal furnace 1 and the microchannel tube 12 will be heated. At this time, the ordinary fan 132 will blow the heat obtained by the heat exchange with the exhaust gas on the microchannel tube 12 into the water vapor removal furnace 1, thereby removing and preheating the water vapor on the surface of the stainless steel tube and saving the energy consumption of the hot air system.

[0051] After being treated with water vapor, the stainless steel pipes will enter the induction annealing furnace 2 through steel belt conveyor 3 and steel belt conveyor 4 for annealing.

[0052] The exhaust gas generated during annealing will be processed by the exhaust gas processor 8 and then enter the cavity 5 through the second pipe 9 to exchange heat with the fins 18 and the microchannel tube 12. After heat exchange, the exhaust gas will enter the cavity 6 through the first pipe 7 for heat exchange and finally be discharged through the external exhaust pipe 10.

[0053] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. An intelligent annealing furnace for stainless steel pipes, characterized in that: It includes a water vapor removal furnace (1) and an induction annealing furnace (2), wherein: the water vapor removal furnace (1) and the induction annealing furnace (2) are respectively equipped with a steel belt conveying mechanism one (3) and a steel belt conveying mechanism two (4), and the shells of the water vapor removal furnace (1) and the induction annealing furnace (2) are respectively provided with cavities one (5) and two (6) of the same shape; The induction annealing furnace (2) is equipped with a waste gas processor (8) and an external exhaust pipe (10). The inlet end of the waste gas processor (8) is connected to the inside of the induction annealing furnace (2). The outlet end of the waste gas processor (8) is fixedly connected to one end of the second pipe (9). The other end of the second pipe (9) is fixedly connected to the outlet end of the water vapor removal furnace (1). The second pipe (9) is connected to the inside of the first cavity (5). The induction annealing furnace (2) is equipped with a temperature sensor inside; The external discharge pipe (10) is connected to the interior of cavity two (6), and the external discharge pipe (10) is located on the side near the discharge port of the induction annealing furnace (2); The inlet side of the water vapor removal furnace (1) is fixedly connected to the inlet side of the induction annealing furnace (2) through pipe one (7), and the pipe one (7) is connected to the interior of cavity one (5) and cavity two (6); A water vapor sensor (14) is installed on the inlet side of the water vapor removal furnace (1); A hot air system is fixedly installed on the water vapor removal furnace (1); A control panel (17) is provided on one side of the induction annealing furnace (2). The controller inside the control panel (17) is electrically connected to the induction annealing furnace (2), the exhaust gas processor (8), the temperature sensor, the water vapor sensor (14), and the hot air system.

2. The intelligent annealing furnace for stainless steel pipes as described in claim 1, characterized in that: Each of the cavities 1 (5) and 2 (6) is uniformly provided with a number of fins (18).

3. The intelligent annealing furnace for stainless steel pipes as described in claim 1, characterized in that: A through hole (11) is provided above the water vapor removal furnace (1). The through hole (11) is connected to the inside of the water vapor removal furnace (1) but is not connected to the inside of the cavity (5). The through hole (11) is located below the hot air system and is fixedly connected to the air outlet of the hot air system.

4. The intelligent annealing furnace for stainless steel pipes as described in claim 3, characterized in that: Several microchannel tubes (12) are uniformly fixed inside the through hole (11), and the microchannel tubes (12) are connected to the cavity (5).

5. The intelligent annealing furnace for stainless steel tubes as described in claim 4, characterized in that: The hot air system includes a housing (13), a hot air blower (131), and a regular blower (132). The hot air blower (131) and the regular blower (132) are fixedly installed on the water vapor removal furnace (1) through the housing (13). The housing (13) covers the through hole (11), and the housing (13) and the through hole (11) are sealed. The air outlets of the hot air blower (131) and the regular blower (132) are connected to the through hole (11).

6. The intelligent annealing furnace for stainless steel pipes as described in claim 1, characterized in that: An atmosphere controller (15) is provided on one side of the induction annealing furnace (2). The atmosphere controller (15) is connected to the inside of the induction annealing furnace (2) through an atmosphere delivery pipe (16). The atmosphere delivery pipe (16) is electrically connected to the controller inside the control console (17).

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