Atmosphere protection mechanism for heating furnace

Abstract

The utility model discloses a heating furnace atmosphere protection mechanism and belongs to the technical field of heating furnaces. The furnace mainly comprises a furnace shell; the hearth is fixedly mounted in the furnace shell; the air inlet is fixedly formed in the side surface of the furnace shell; the breather pipe is mounted at the interface end of the air inlet; the heating mechanism is installed on the ventilation pipe in a clamping mode, the quantitative feeding mechanism comprises a semi-column cover, the semi-column cover is installed on the ventilation pipe in a clamping mode, a fixing plate is fixedly installed in the semi-column cover, a round hole is formed in the surface of the fixing plate, and a heating pipe penetrates through the round hole. According to the atmosphere protection mechanism for the heating furnace, when inert gas is added into the heating furnace, the heating mechanism is started to heat the ventilation pipe, heat is transferred to the inert gas through the ventilation pipe, and therefore it is guaranteed that the temperature field in the hearth is not affected by the inert gas with the low temperature entering the hearth and is not uniform.

Description

Technical Field

[0001] The present application relates to the technical field of heating furnaces, and in particular to an atmosphere protection mechanism for a heating furnace. Background Art

[0002] Heating furnaces are suitable for the heat treatment process of metals so that the metals can be heated to a higher temperature. Most metals will be oxidized after reaching high temperatures, and their surfaces will fall off due to the formation of oxide scale, which will have a great impact on the surface quality and size of the metal. Therefore, it is necessary to introduce inert gas for protection during the heating process.

[0003] When the existing atmosphere heating furnace heats the metal, the inert gas is stored in a nitrogen cylinder, and the nitrogen cylinder is connected to the heating furnace through a pipe fitting and enters the furnace body;

[0004] However, when inert gas is added, due to its own low temperature, it will cause an uneven temperature field in the furnace body, affecting the heating effect of the metal. Therefore, it is necessary to design a heating furnace atmosphere protection mechanism to solve the above problem.

[0005] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0006] Based on the above problems existing in the prior art, the problem to be solved by the present application is: to provide a heating furnace atmosphere protection mechanism to solve the problem that when the inert gas enters the furnace body through the pipe, its own temperature is low, which will cause an uneven temperature field in the furnace body.

[0007] The technical solution adopted by the present application to solve its technical problems is: a heating furnace atmosphere protection mechanism, comprising: a furnace shell; a furnace chamber, which is fixedly installed inside the furnace shell; an air inlet, which is fixedly installed on the side of the furnace shell; a vent pipe, which is installed at the interface end of the air inlet, and the vent pipe is used to transport inert gas; a heating mechanism, which is snap-fitted onto the vent pipe, and the quantitative feeding mechanism comprises: a semi-column cover, which is snap-fitted onto the vent pipe, a fixing plate is fixedly installed inside the semi-column cover, a circular hole is opened on the surface of the fixing plate, and a heating pipe passes through the circular hole; the heating pipe is used to heat the vent pipe.

[0008] Furthermore, a storage box is provided on one side of the lower end of the semi-column cover, a cardboard adapted to the curvature of the ventilation pipe surface is fixedly installed on the storage box, a sealing cover plate is covered on the storage box, and circular grooves adapted to the curvature of the ventilation pipe surface are opened on both sides of the sealing cover plate.

[0009] Furthermore, a supporting gasket is fixedly installed on the outer surface of the semi-column cover, and telescopic cylinders are fixedly installed on both sides of the storage box.

[0010] Furthermore, the semi-column covers are butt-jointed to form a cylinder.

[0011] Furthermore, the sealing cover plate and the storage box form a closed space.

[0012] The beneficial effect of the present application is that the heating furnace atmosphere protection mechanism provided by the present application, when adding inert gas into the heating furnace, heats the ventilation pipe by starting the heating mechanism, and transfers heat to the inert gas through the ventilation pipe, thereby ensuring that the temperature field in the furnace will not be affected by the lower temperature inert gas entering the furnace and will be uneven.

[0013] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0015] Figure 1 It is an overall schematic diagram of the heating furnace atmosphere protection mechanism in this application;

[0016] Figure 2 for Figure 1 Exploded schematic diagram of the overall structure;

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0018] Among them, the reference numerals in the figure are:

[0019] 1. Furnace shell; 11. Furnace chamber; 12. Air inlet; 13. Ventilation pipe; 14. Switch plate; 15. Exhaust hole; 16. Exhaust pipe; 17. Vacuum pump; 2. Gas cylinder; 21. Connection end; 3. Storage box; 31. Telescopic cylinder; 32. Cardboard; 33. Semi-column cover; 331. Fixed plate; 332. Heating tube; 34. Support gasket; 4. Sealing cover plate; 41. Circular groove. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0022] like Figure 1-Figure 3 As shown, the present application provides a heating furnace atmosphere protection mechanism, including a furnace shell 1 and a furnace 11 fixedly installed inside the furnace shell 1, the furnace 11 is used to heat various metals, and an air inlet 12 is fixedly installed on the side of the furnace shell 1, the air inlet 12 is used to introduce inert gas, and a vent pipe 13 is installed at one end of the air inlet 12 away from the furnace shell 1, the vent pipe 13 is used to transport inert gas, and a switch plate 14 is fixedly installed on the outer surface of the furnace shell 1, the switch plate 14 is used to control the start of the heating furnace, and an exhaust hole 15 is also fixedly installed on the side of the furnace shell 1, an exhaust pipe 16 is installed at the end of the exhaust hole 15, and a vacuum pump 17 is installed at the end of the exhaust pipe 16, and the vacuum pump 17 is used to evacuate the gas in the furnace 11;

[0023] At the same time, a gas cylinder 2 is placed on one side of the furnace shell 1. The gas cylinder 2 stores inert gas, and a connecting end 21 is fixedly installed on the outer surface of the gas cylinder 2. The connecting end 21 is used to connect with the ventilation pipe 13;

[0024] In summary, when the heating furnace is in normal use, first connect the heating furnace to the power supply, turn on the heating furnace switch and adjust the heating temperature and atmosphere type, then place the metal in the furnace 11 and close the furnace door, pour oil into the vacuum pump 17, then connect the gas cylinder 2 to the heating furnace through the vent pipe 13, and connect the vacuum pump 17 to the exhaust hole 15 through the outlet pipe 16, and then turn on the exhaust switch. When the gas in the heating furnace is evacuated, turn off the exhaust switch, then turn on the air inlet switch, turn on the gas tank 2 switch, and adjust the gas flow meter to allow the inert gas to enter slowly, so that the metal can be heated in an inert gas environment to prevent metal oxidation;

[0025] After heating is completed, turn off the gas cylinder, wait for the heating furnace to cool down, turn off the gas source, and take out the metal;

[0026] In the present application, the heating furnace is a common atmosphere heating furnace. The above is only a brief description of its basic working principle. For the specific working principle, reference can be made to relevant literature and will not be repeated here.

[0027] When the heating furnace is heating the metal, when the inert gas is added, the temperature field in the furnace will be uneven due to the low temperature of the inert gas itself, which will affect the heating effect of the heated metal.

[0028] In order to solve the above problems, the present application provides a heating mechanism, which can further improve the uniformity of metal heating, specifically:

[0029] like Figure 1-Figure 3 As shown, the heating mechanism includes two groups of semi-column covers 33 mounted on the surface of the ventilation pipe 13, and the two groups of semi-column covers 33 are connected to form a cylinder. A fixing plate 331 is fixedly installed in the semi-column cover 33, and a circular hole (not marked in the figure) is opened on the surface of the fixing plate 331. A heating pipe 332 runs through the circular hole. The heating pipe 332 is used to heat the ventilation pipe 13. At the same time, the ventilation pipe 13 is placed in the middle position of the two groups of semi-column covers 33;

[0030] In the present application, the heating tube 332 is a tubular electric heating element (hereinafter referred to as electric heating tube), which is an electrical element that converts electrical energy into thermal energy. The heating element can heat gas, metal molds and various liquids, etc.;

[0031] When inert gas is added to the heating furnace, the heating tube 332 is started, and the heating tube 332 heats the outer surface of the vent pipe 13, and then the heat is transferred to the inert gas through the vent pipe 13. At this time, the inert gas in the vent pipe 13 will be heated before being put into the furnace 11, thereby ensuring that the temperature field in the furnace 11 will not be affected by the low-temperature inert gas entering the furnace 11 and become uneven.

[0032] In order to prevent the heating tube 332 from continuously heating and causing heat loss, Figure 2-Figure 3 As shown, a support gasket 34 is fixedly installed on the outer surface of the semi-column cover 33, and the support gasket 34 is used to support the semi-column cover 33. A storage box 3 is provided on one side of the lower end of the semi-column cover 33, and the storage box 3 is used to place the semi-column cover 33. Telescopic cylinders 31 are fixedly installed on both sides of the storage box 3. The output end of the telescopic cylinder 31 passes through the storage box 3 and is connected to the support gasket 34. The support gasket 34 is suitable for linear movement with the output end of the telescopic cylinder 31, and is suitable for driving the semi-column cover 33 to move.

[0033] At the same time, a card plate 32 adapted to the curvature of the surface of the ventilation pipe 13 is fixedly installed on the storage box 3, and a sealing cover plate 4 is covered on the storage box 3. The two sides of the sealing cover plate 4 are provided with circular grooves 41 adapted to the curvature of the surface of the ventilation pipe 13. At the same time, the sealing cover plate 4 covers the upper end of the ventilation pipe 13. The sealing cover plate 4 is suitable for forming a closed space with the storage box 3 to preserve the heat of the heating pipe 332 when it is continuously heated;

[0034] In the initial state, the two sets of semi-column covers 33 are engaged with the outer surface of the vent pipe 13 to heat the vent pipe 13;

[0035] When the heating tube 332 is continuously heated, the storage box 3 and the sealing cover 4 are oppositely covered on the semi-column cover 33, so that the heat generated by the heating tube 332 during heating can be preserved to prevent heat loss. At the same time, when the ventilation tube 13 is worn out due to long-term use, the sealing cover 4 is opened and the telescopic cylinder 31 is started. The output end of the telescopic cylinder 31 drives the supporting gasket 34, and the supporting gasket 34 drives the semi-column cover 33 to move to both sides, so that the ventilation tube 13 can be easily disassembled and replaced.

[0036] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Heating furnace atmosphere protection mechanism, characterized by: include: Furnace shell (1); A furnace (11), the furnace (11) being fixedly mounted inside the furnace shell (1); An air inlet (12), the air inlet (12) being fixedly mounted on a side of the furnace shell (1); A vent pipe (13), the vent pipe (13) being installed at an interface end of the air inlet (12), the vent pipe (13) being used to transport an inert gas; A heating mechanism, the heating mechanism is mounted on the ventilation pipe (13) in a snap-fit ​​manner, and the heating mechanism comprises: A semi-column cover (33), the semi-column cover (33) being snapped onto the ventilation pipe (13), a fixing plate (331) being fixedly mounted in the semi-column cover (33), a circular hole being provided on the surface of the fixing plate (331), a heating pipe (332) penetrating the circular hole, the heating pipe (332) being used to heat the ventilation pipe (13).

2. The heating furnace atmosphere protection mechanism according to claim 1, characterized in that: A storage box (3) is provided at one side of the lower end of the semi-column cover (33), a clamping plate (32) adapted to the curvature of the surface of the ventilation pipe (13) being fixedly mounted on the storage box (3), a sealing cover plate (4) being covered on the storage box (3), circular grooves (41) adapted to the curvature of the surface of the ventilation pipe (13) being provided on both sides of the sealing cover plate (4).

3. The heating furnace atmosphere protection mechanism according to claim 2, characterized in that: A supporting gasket (34) is fixedly mounted on the outer surface of the semi-column cover (33), and telescopic cylinders (31) are fixedly mounted on both sides of the storage box (3).

4. The heating furnace atmosphere protection mechanism according to claim 3 is characterized in that: The semi-cylindrical covers (33) are butt-jointed to form a cylinder.

5. The heating furnace atmosphere protection mechanism according to claim 2, characterized in that: The sealing cover plate (4) and the storage box (3) form a closed space.

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