High-temperature vacuum degassing furnace for metal pipe fittings

Abstract

The utility model relates to a high-temperature vacuum degassing furnace for metal pipe fittings. The high-temperature vacuum degassing furnace comprises a heating furnace, a high-temperature furnace tube, a furnace tube air cooling shell, a flame arrester, a console, an air blower, an exhaust fan and the like. The device is characterized in that the furnace tube air-cooling shell is additionally arranged outside the high-temperature furnace tube, air cooling is carried out through the air blower, and direct cooling of the hearth is avoided. A flame arrester is arranged at the air outlet end of the furnace tube air-cooling shell, so that diffusion of high-temperature flue gas is prevented, and high-temperature rust and the like blown out of the furnace tube air-cooling shell are prevented from igniting nearby objects. Meanwhile, a plurality of temperature detection points are arranged, including the top of the console, the interior of the high-temperature furnace tube and the air outlet of the furnace tube air cooling shell, so that the temperature condition of the degassing furnace can be comprehensively monitored, and the stability and safety of equipment operation are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum degassing furnaces, in particular to a high-temperature vacuum degassing furnace used for metal pipe fittings. Background Art

[0002] In the metal processing industry, high temperature degassing furnace is an important equipment used to remove gas from metal pipes to ensure product quality and performance. For example, in the preparation process of high temperature heat pipes, high temperature vacuum degassing is a crucial step that directly affects the performance and service life of high temperature heat pipes. However, there are some problems with existing high temperature degassing furnaces, such as small degassing samples, poor degassing effect on large-sized objects, long vacuum time before heating, and slow cooling.

[0003] In the prior art, patent number CN201010156395.6 "A high-temperature vacuum baking furnace and its operation method" achieves rapid cooling by directly cooling the furnace. However, this method may affect the service life of the furnace, because frequent high-temperature cooling processes will cause thermal stress on the furnace, resulting in damage to the furnace and shortening of its life. In addition, inert gas is always used during the cooling and purging process, which has a high operating cost. The device also limits the size of the degassing sample.

[0004] In order to solve the problems in the prior art, the utility model provides a high-temperature vacuum degassing furnace for metal pipes. The furnace has the following characteristics: it is suitable for degassing large-sized objects; the cooling speed is fast, and the furnace is not directly cooled; the heating furnace temperature range is wide, which can reach 1000℃ to 1200℃; the heating furnace is easy to repair and replace. Summary of the invention

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a high-temperature vacuum degassing furnace for metal pipe fittings, which has the following characteristics: it is suitable for degassing treatment of large-sized objects; it can achieve rapid cooling and avoid the influence of direct cooling on the furnace; it has a wide range of heating furnace temperature; and the maintenance and replacement of the heating furnace are simple and easy.

[0006] A high-temperature vacuum degassing furnace for metal pipe fittings, comprising a heating furnace, a high-temperature furnace tube, a furnace tube air-cooling shell, a flame arrester, a control console, a blower, and an exhaust fan; the high-temperature furnace tube is arranged in the middle of the heating furnace and passes through the heating furnace; the heating furnace is placed above the control console; the furnace tube air-cooling shell is sleeved on the outer wall of the high-temperature furnace tube, and the two ends are sealed, and an interface is respectively provided at the two ends; the blower is connected through an interface of an air duct and a flange end of the furnace tube air-cooling shell, and a valve is provided on the air duct; the other interface of the furnace tube air-cooling shell is connected through an air duct and the flame arrester.

[0007] A further solution is that the heating furnace is composed of a plurality of split-type heating furnace units, each heating furnace unit is provided with a high-temperature furnace tube support plate at the furnace mouth, and the heating furnace can be opened and closed; a thermocouple and a power supply connector are provided at the bottom of each heating furnace; and the outer shell of the heating furnace is designed in a porous form.

[0008] The solution is further that a flange interface is provided at the blower end of the high-temperature furnace tube, an inert gas purge port is provided on the blind plate, a thermocouple insertion tube is provided in the high-temperature furnace tube, and the thermocouple insertion port is provided on the blind plate; a vacuum unit interface is provided at the other end of the high-temperature furnace tube, and the interface pipe is not less than 50 cm long.

[0009] A further solution is that the front, rear, left and right panels of the console are all detachable; the exhaust fan mounting base is at the lower end of the back of the console; a control switch instrument of the electric furnace is installed on the front panel of the console; an exhaust hole is provided on the upper panel of the console; and a plurality of thermocouples are evenly arranged horizontally in the console at a position 5-20 cm away from the upper panel.

[0010] A further solution is that a temperature monitoring port is provided at the air outlet end of the air-cooled shell of the furnace tube.

[0011] Beneficial effects of the utility model:

[0012] 1. This degassing furnace can realize high-temperature vacuum degassing of large-sized metal pipes. Before vacuum degassing, the metal pipes first use inert gas to replace the air in the high-temperature furnace tube. When the oxygen concentration at the inert gas outlet is lower than the set value, vacuuming can be started, and the power supply of the heating furnace is started to heat up at the same time. This process saves the time required to pump the high-temperature furnace tube to a high vacuum state. Since the larger the size of the high-temperature furnace tube, the longer the vacuuming time required, this method speeds up the high-temperature vacuum degassing process of metal pipes.

[0013] 2. This degassing furnace uses a furnace tube air-cooling shell added to the outer wall of the high-temperature furnace tube, and uses a blower to air-cool the outer wall of the high-temperature furnace tube to avoid direct blowing of the furnace, thereby effectively preventing thermal stress on the furnace due to rapid cooling, which may cause damage to the furnace. At the same time, the heating furnace is designed in a split form. During the cooling process, the heating furnace can be opened at a certain angle to speed up the cooling speed of the high-temperature furnace tube.

[0014] 3. A flame arrester is designed at the air outlet end of the air-cooled shell of the furnace tube of this degassing furnace to prevent the diffusion of high-temperature flue gas and the high-temperature rust blown out from the air-cooled shell of the furnace tube from igniting nearby objects.

[0015] 4. This degassing furnace is designed with multiple temperature detection points, including the top of the console, inside the high-temperature furnace tube, and at the air outlet of the furnace tube air-cooled shell. The purpose of setting up multiple temperature detection points is to comprehensively monitor the temperature of the degassing furnace to ensure the safety and stability of the equipment operation. By setting temperature detection points at different locations, the temperature changes inside and outside the degassing furnace can be effectively monitored, and timely measures can be taken to prevent damage to the equipment or safety hazards caused by excessively high or low temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front schematic diagram of a high-temperature vacuum degassing furnace for metal pipes according to the utility model;

[0017] Figure 2 It is a schematic diagram of the back side of a high-temperature vacuum degassing furnace for metal pipes according to the utility model;

[0018] Figure 3 This is a gas path structure diagram of the high-temperature furnace tube and the furnace tube air-cooling shell described in the utility model.

[0019] In the figure, 1-heating furnace, 2-high temperature furnace tube, 3-furnace tube air-cooling shell, 4-vacuum unit interface, 5-air duct, 6-flame arrester, 7-control console, 8-thermocouple, 9-exhaust fan, 10-control console support wheel, 11-control switch instrument of electric furnace, 12-blower, 13-valve, 14-air duct, 15-flange and blind plate, 16-inert gas purge port, 17-thermocouple insertion tube, 18-high temperature furnace tube support plate, 19-temperature monitoring port, 20-exhaust hole. DETAILED DESCRIPTION

[0020] An embodiment of a high temperature vacuum degassing furnace for metal pipes, such as Figure 1 , Figure 2 and Figure 3 As shown, the high-temperature vacuum degassing furnace includes a heating furnace 1, a high-temperature furnace tube 2, a furnace tube air-cooling casing 3, a flame arrester 6, a control console 7, a blower 12, and an exhaust fan 9; the high-temperature furnace tube 2 is arranged in the middle of the heating furnace 1 and passes through the heating furnace 1; the heating furnace 1 is placed above the control console 7; the furnace tube air-cooling casing 3 is sleeved on the outer wall of the high-temperature furnace tube 2, and the two ends are sealed, and an interface is provided at each end; the blower 12 is connected to the interface of the flange end of the furnace tube air-cooling casing 3 through the air duct 5, and a valve 13 is provided on the air duct 5; the other interface of the furnace tube air-cooling casing 3 is connected to the flame arrester 6 through the air duct 5.

[0021] In this embodiment, Figure 1 , Figure 2As shown, the heating furnace 1 is composed of a plurality of split heating furnace units, each heating furnace unit is provided with a high-temperature furnace tube support plate 18 at the furnace mouth, and the heating furnace 1 can be opened and closed; a thermocouple 8 and a power connector are provided at the bottom of each heating furnace; the outer shell of the heating furnace is designed in a porous form.

[0022] In this embodiment, Figure 1 , Figure 2 and Figure 3 As shown, a flange 15 interface is provided at the blower 12 end of the high-temperature furnace tube 2, an inert gas purge port 16 is provided on the blind plate, a thermocouple insertion tube 17 is provided in the high-temperature furnace tube 2, and the thermocouple insertion port is provided on the blind plate; a vacuum unit interface 4 is provided at the other end of the high-temperature furnace tube, and the interface pipe length is not less than 50 cm.

[0023] In this embodiment, Figure 1 , Figure 2 As shown, the front, rear, left and right panels of the console 7 are all detachable; the exhaust fan 9 is mounted on the lower end of the back of the console 7; the control switch instrument 11 of the electric furnace is installed on the front panel of the console 7; the upper panel of the console 7 is provided with an exhaust hole 20; a plurality of thermocouples are evenly arranged horizontally in the console 7 at a position 5-20 cm away from the upper panel.

[0024] In this embodiment, Figure 1 , Figure 2 and Figure 3 As shown, a temperature monitoring port 19 is provided at the air outlet end of the furnace tube air-cooling housing 3 .

[0025] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes made by technicians in this technical field within the essential scope of the present invention also belong to the protection scope of the present invention.

Claims

1. A high temperature vacuum degassing furnace for metal pipes, characterized in that: The high-temperature vacuum degassing furnace comprises a heating furnace, a high-temperature furnace tube, a furnace tube air-cooling shell, a flame arrester, a control console, a blower, and an exhaust fan; the high-temperature furnace tube is arranged in the middle of the heating furnace and passes through the heating furnace; the heating furnace is placed above the control console; the furnace tube air-cooling shell is sleeved on the outer wall of the high-temperature furnace tube, and the two ends are sealed, and an interface is respectively provided at the two ends; the blower is connected through an interface of an air duct and a flange end of the furnace tube air-cooling shell, and a valve is provided on the air duct; the other interface of the furnace tube air-cooling shell is connected through an air duct and a flame arrester.

2. A high temperature vacuum degassing furnace for metal pipes according to claim 1, characterized in that: The heating furnace is composed of a plurality of split heating furnace units, each heating furnace unit is provided with a high-temperature furnace tube support plate at the furnace mouth, and the heating furnace can be opened and closed; a thermocouple and a power supply connector are provided at the bottom of each heating furnace; the outer shell of the heating furnace is designed in a porous form.

3. A high temperature vacuum degassing furnace for metal pipes according to claim 1, characterized in that: The high-temperature furnace tube blower end is provided with a flange interface, an inert gas purge port is provided on the blind plate, a thermocouple insertion tube is provided in the high-temperature furnace tube, and the thermocouple insertion port is provided on the blind plate; the other end of the high-temperature furnace tube is provided with a vacuum unit interface, and the interface pipe length is not less than 50cm.

4. A high temperature vacuum degassing furnace for metal pipes according to claim 1, characterized in that: Place The front, rear, left and right panels of the console are all detachable; the exhaust fan mounting seat is at the lower end of the back of the console; the control switch instrument of the electric furnace is installed on the front panel of the console; the upper panel of the console is provided with an exhaust hole; and a plurality of thermocouples are evenly arranged horizontally in the console at a position 5-20 cm away from the upper panel.

5. A high temperature vacuum degassing furnace for metal pipes according to claim 1, characterized in that: A temperature monitoring port is arranged at the air outlet end of the air-cooling shell of the furnace tube.

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