A dry bottomless atmosphere protection furnace

Abstract

The present invention provides a dry bottomless atmosphere protection furnace, comprising a furnace body, a furnace bottom, a furnace cover assembly and a material seat arranged in the furnace body, and also comprising a furnace gall assembly, wherein the furnace gall assembly is arranged in the furnace body and comprises: a furnace gall cylinder, wherein the lower opening of the furnace gall cylinder extends to the outside of the furnace bottom; a compensator, which is sealed and installed below the furnace gall cylinder; a furnace bottom frame, which is arranged on the inner side of the compensator and is sealed and connected to the lower end of the compensator; and a base, which is installed on the top of the furnace bottom frame and a sealing layer is arranged between the base and the furnace gall cylinder; by setting the furnace bottom and the furnace body as a split structure and arranging the compensator at the bottom of the furnace gall barrel, the compensator is used to compensate for the expansion of the furnace gall barrel during the expansion of the furnace body, thereby improving the service life of the furnace gall, and solving the technical problem in the prior art that the cracking of the furnace gall affects the normal use of the furnace.

Description

Technical Field

[0001] The invention relates to the technical field of heat treatment equipment, in particular to a dry bottomless atmosphere protection furnace. Background Art

[0002] Atmosphere furnace is a kind of heat treatment equipment, which is often equipped with a furnace core to provide a specific working environment. Its characteristic is that at a certain temperature, an artificial atmosphere of a certain composition is introduced into the furnace core to achieve a certain heat treatment purpose, such as gas carburizing, carbonitriding, bright quenching, annealing, normalizing, etc.

[0003] Chinese patent CN112662970A discloses an environmentally friendly magnesium alloy parts heat treatment device, including a pressure gauge, a vent valve, a vacuum pump, a gas cylinder, a sealed circulation fan, a furnace cover, a furnace body, a furnace liner, a return air duct and a heating body, wherein the pressure gauge is connected to the inside of the furnace through an air pipeline to measure the gas pressure in the furnace; the vacuum pump and the gas cylinder are both connected to the air pipeline using a DN25 interface to facilitate vacuuming and filling the furnace with inert gas; the vent valve is connected to the front end of the vacuum pump; the sealed circulation fan is fixed to the furnace cover by threads to force circulation of the atmosphere in the furnace; the furnace body, the furnace liner and the return air duct are fixedly connected, and the heating body is fixed to the insulation cotton or refractory bricks in the furnace to heat the furnace.

[0004] During the heat treatment process, the furnace core will expand due to the influence of high temperature. During long-term use, once the expansion limit of the furnace core is exceeded, the furnace core will crack, affecting the airtightness and making it impossible to carry out the heat treatment work. Summary of the invention

[0005] The purpose of the present invention is to provide a dry bottomless atmosphere protection furnace in view of the deficiencies in the prior art. The furnace bottom and the furnace body are set as a split structure, and a compensator is arranged at the bottom of the furnace barrel body. During the expansion of the furnace body, the compensator is used to compensate for the expansion of the furnace barrel body, thereby improving the service life of the furnace barrel and solving the technical problem in the prior art that the cracking of the furnace barrel affects the normal use of the furnace.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A dry bottomless atmosphere protection furnace comprises a furnace body, a furnace bottom, a furnace cover assembly and a material seat arranged in the furnace body, and also comprises a furnace liner assembly, wherein the furnace liner assembly is arranged in the furnace body and comprises:

[0008] A furnace cylinder, wherein the lower opening of the furnace cylinder extends to the outside of the furnace bottom;

[0009] A compensator is sealed and installed below the furnace cylinder to provide a compensation space for the longitudinal expansion of the furnace cylinder;

[0010] A furnace bottom frame, which is arranged inside the compensator and is sealed and connected to the lower end of the compensator; and

[0011] The base is installed on the top of the furnace bottom frame, and a sealing layer is arranged between the base and the furnace cylinder.

[0012] Preferably, the compensator is an annular structure, which includes a compensation structure arranged in the middle and a first connecting structure and a second connecting structure respectively arranged at the upper and lower ends of the compensation structure.

[0013] As a preference, the first connection structure is detachably connected to the furnace tube body, and the second connection structure is detachably connected to the furnace bottom frame.

[0014] As a preference, the material holder is installed on the base, a groove is provided on the top of the base, and a protruding structure cooperating with the groove is provided on the bottom of the material holder.

[0015] As a preferred embodiment, the furnace cover assembly is detachably connected to the upper end of the furnace assembly, and comprises:

[0016] A cover body, detachably mounted on the top of the furnace body;

[0017] The fan is rotatably connected to the cover body, and comprises fan blades arranged below the cover body and a driving unit arranged above the cover body. The driving unit is sealedly connected to the cover body, and a driving end thereof passes through the cover body and is transmission-connected to the fan blades.

[0018] As a preferred embodiment, the furnace cover assembly and the material seat are provided with:

[0019] A first flow guide structure is installed on the lower side of the cover body and is located below the fan blades;

[0020] The second flow guiding structure is installed on the material seat and is spaced apart from the first flow guiding structure.

[0021] Preferably, a lifting mechanism for controlling the lifting of the furnace cover assembly is installed on one side of the furnace body.

[0022] As a preference, the cross-section of the compensation structure is corrugated.

[0023] As a preferred embodiment, the base is made of refractory materials, preferably anti-carburization bricks.

[0024] As a preference, the furnace bottom and the furnace body are arranged in an integrated manner or in a separate manner.

[0025] The beneficial effects of the present invention are:

[0026] (1) The present invention installs a compensator under the furnace cylinder. When the furnace cylinder expands due to heat, the connection between the compensator and the furnace cylinder will undergo longitudinal displacement due to the expansion. The compensation structure will then contract to compensate for the longitudinal expansion of the furnace cylinder, thereby preventing the furnace cylinder from being squeezed and cracked in the furnace body after the furnace cylinder expands due to heat, thereby improving production safety.

[0027] (2) The present invention provides a base made of anti-carburization bricks and provides a sealing layer between the base and the furnace cylinder, thereby achieving a primary seal at the bottom of the furnace cylinder. The secondary seal at the bottom of the furnace cylinder is achieved by coordinating the sealed connection between the bottom of the furnace cylinder and the compensator and the furnace bottom frame, thereby significantly enhancing the sealing performance of the furnace assembly and ensuring the stability of the atmosphere in the furnace and the processing quality.

[0028] (3) The present invention uses the first connecting structure and the second connecting structure of the compensator to detachably connect the furnace tube body and the furnace bottom frame, which is convenient for maintenance and replacement. At the same time, the furnace cover assembly and the upper end of the furnace assembly are also detachably connected, which increases the flexibility of equipment operation, simplifies the structure, and saves production and use costs.

[0029] (4) The fan in the furnace cover assembly of the present invention optimizes the circulation of the atmosphere in the furnace through the cooperation of the first guide structure and the second guide structure, thereby improving the uniformity of atmosphere distribution and processing efficiency.

[0030] (5) The present invention can conveniently control the lifting and lowering of the furnace cover assembly by providing a lifting mechanism, thereby facilitating the loading and unloading of workpieces and improving the convenience of operation.

[0031] (6) The furnace bottom and the furnace body of the present invention may be arranged in an integrated manner or in a separate manner, and may be configured according to different process requirements, thereby increasing the flexibility of equipment installation.

[0032] In summary, the present invention has the advantages of high safety, good air tightness, stable operation, flexible installation, low production and use costs, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0034] Figure 2 For the present invention Figure 1 A partial enlarged schematic diagram of point I in the middle. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0037] Embodiment 1

[0038] like Figure 1-Figure 2 As shown, the present embodiment provides a dry bottomless atmosphere protection furnace, comprising a furnace body 1, a furnace bottom 2, a furnace cover assembly 3 and a material seat 4 arranged in the furnace body 1, the inner side of the furnace body 1 is provided with a plurality of heating units for providing heat, and the heating units can select point heating, gas heating and the like, and also comprises a furnace gall assembly 5, the furnace gall assembly 5 is arranged in the furnace body 1, and comprises: a furnace gall cylinder 51, the lower mouth of the furnace gall cylinder 51 extends to the outside of the furnace bottom 2; a compensator 52, sealed and installed under the furnace gall cylinder 51, providing compensation space for the longitudinal expansion of the furnace gall cylinder 51; a furnace bottom frame 53, arranged on the inner side of the compensator 52, and sealed and connected to the lower end of the compensator 52; and a base 54, installed on the top of the furnace bottom frame 53, and a sealing layer 55 is arranged between it and the furnace gall cylinder 51, and the base 54 is made of refractory material, preferably anti-carburization bricks.

[0039] By installing a compensator under the furnace cylinder 51, when the furnace cylinder 51 expands due to heat, the connection between it and the compensator 52 will undergo longitudinal displacement due to expansion, and the compensation structure 521 will shrink to compensate for the longitudinal expansion of the furnace cylinder 51, preventing the furnace cylinder 51 from being squeezed and cracked in the furnace body 1 after thermal expansion, thereby improving production safety.

[0040] like Figure 2As shown, the compensator 52 is an annular structure, which includes a compensation structure 521 arranged in the middle and a first connection structure 522 and a second connection structure 523 respectively arranged at the upper and lower ends of the compensation structure 521. The compensation structure 521 is preferably a bellows, and the first connection structure 522 and the second connection structure 523 are preferably flanges. The first connection structure 522 is detachably connected to the furnace cylinder 51, and the second connection structure 523 is detachably connected to the furnace bottom frame 53, and a seal is provided at the connection.

[0041] By providing a base 54 made of anti-carburization bricks and providing a sealing layer 55 between the base 54 and the furnace cylinder 51, the primary sealing of the bottom of the furnace cylinder 51 can be achieved, and the secondary sealing of the bottom of the furnace cylinder 51 can be achieved by coordinating the sealed connection between the bottom of the furnace cylinder 51 and the compensator 52 and the furnace bottom frame 53, which significantly enhances the sealing performance of the furnace assembly 5 and ensures the stability of the atmosphere in the furnace and the processing quality.

[0042] like Figure 2 As shown, the material holder 4 is installed on the base 54 , a groove 541 is provided on the top of the base 54 , and a protrusion structure 41 matching with the groove 541 is provided on the bottom of the material holder 4 , so that the material holder 4 can be stably installed on the base 54 .

[0043] like Figure 1 As shown, the furnace cover assembly 3 is detachably connected to the upper end of the furnace chamber assembly 5, and includes: a cover body 31, which is detachably mounted on the top of the furnace body 1; a fan 32, which is rotatably connected to the cover body 31, including fan blades 321 arranged below the cover body 31 and a driving unit 322 arranged above the cover body 31, the driving unit 322 is sealed and connected to the cover body 31, and its driving end passes through the cover body 31 and is transmission-connected to the fan blades 321.

[0044] The first connecting structure 522 and the second connecting structure 523 of the compensator 52 are detachably connected to the furnace tube body 51 and the furnace base frame 53, which is convenient for maintenance and replacement. At the same time, the furnace cover assembly 3 and the upper end of the furnace tube assembly 5 are also detachably connected, which increases the flexibility of equipment operation and saves production and use costs.

[0045] like Figure 1 As shown, the furnace cover assembly 3 and the material seat 4 are provided with: a first guide structure 61, which is installed on the lower side of the cover body 31 and is located below the fan blade 321; a second guide structure 62, which is installed on the material seat 4 and is spaced apart from the first guide structure 61. The first guide structure 61 is provided with an opening corresponding to the fan 32, and a plurality of mounting components are arranged around it and fixedly installed on the cover body 31; the second guide structure 62 is arranged vertically to guide the airflow of the fan 32 to blow to the workpiece placed on the material seat 4 below.

[0046] The fan 32 in the furnace cover assembly 3 is used in cooperation with the first flow guiding structure 61 and the second flow guiding structure 62 to optimize the circulation of the atmosphere in the furnace, thereby improving the uniformity of atmosphere distribution and the processing efficiency.

[0047] Embodiment 2

[0048] like Figure 1 As shown, the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The second embodiment is different from the first embodiment in that a lifting mechanism 7 for controlling the lifting of the furnace cover assembly 3 is installed on one side of the furnace body 1, which can conveniently control the lifting of the furnace cover assembly 3, facilitate loading and unloading of workpieces, and improve the convenience of operation.

[0049] Embodiment 3

[0050] like Figure 1 As shown, the components identical or corresponding to those in the second embodiment are marked with the corresponding reference numerals in the second embodiment. For the sake of simplicity, only the differences from the second embodiment are described below. The third embodiment is different from the second embodiment in that the furnace bottom 2 and the furnace body 1 are integrally or separately arranged, and can be configured according to different process requirements, thereby increasing the flexibility of equipment installation.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dry bottomless atmosphere protection furnace, comprising a furnace body (1), a furnace bottom (2), a furnace cover assembly (3), and a material seat (4) arranged in the furnace body (1), characterized in that: It also includes a furnace core assembly (5), which is arranged in the furnace body (1) and includes: A furnace cylinder (51), wherein a lower opening of the furnace cylinder (51) extends to the outside of the furnace bottom (2); A compensator (52) is installed in a sealing manner below the furnace cylinder (51) to provide a compensation space for the longitudinal expansion of the furnace cylinder (51); A furnace bottom frame (53) is arranged inside the compensator (52) and is sealed and connected to the lower end of the compensator (52); and A base (54) is mounted on the top of the furnace bottom frame (53), and a sealing layer (55) is provided between the base (54) and the furnace cylinder (51); The compensator (52) is an annular structure, comprising a compensation structure (521) arranged in the middle, and a first connection structure (522) and a second connection structure (523) respectively arranged at the upper and lower ends of the compensation structure (521); The first connection structure (522) is detachably connected to the furnace cylinder (51), and the second connection structure (523) is detachably connected to the furnace bottom frame (53); The bottom of the furnace cylinder (51) is sealed with the compensator (52) and the furnace bottom frame (53) to form a secondary seal at the bottom of the furnace cylinder (51).

2. A dry bottomless atmosphere protection furnace according to claim 1, characterized in that: The material seat (4) is mounted on the base (54); a groove (541) is provided on the top of the base (54); and a protruding structure (41) matching with the groove (541) is provided on the bottom of the material seat (4).

3. A dry bottomless atmosphere protection furnace according to any one of claims 1-2, characterized in that: The furnace cover assembly (3) is detachably connected to the upper end of the furnace core assembly (5), and comprises: A cover body (31) is detachably mounted on the top of the furnace body (1); A fan (32) is rotatably connected to the cover body (31), comprising a fan blade (321) arranged below the cover body (31) and a drive unit (322) arranged above the cover body (31); the drive unit (322) is sealedly connected to the cover body (31), and a drive end thereof passes through the cover body (31) and is transmission-connected to the fan blade (321).

4. A dry bottomless atmosphere protection furnace according to claim 3, characterized in that: Disposed between the furnace cover assembly (3) and the material seat (4): A first flow guide structure (61) is installed on the lower side of the cover body (31) and is located below the fan blades (321); The second flow guiding structure (62) is installed on the material seat (4) and is spaced apart from the first flow guiding structure (61).

5. The dry bottomless atmosphere protection furnace according to claim 3, characterized in that: A lifting mechanism (7) for controlling the lifting of the furnace cover assembly (3) is installed on one side of the furnace body (1).

6. The dry bottomless atmosphere protection furnace according to claim 1, characterized in that: The cross-section of the compensation structure (521) is corrugated.

7. The dry bottomless atmosphere protection furnace according to claim 3, characterized in that: The base (54) is made of refractory material.

8. The dry bottomless atmosphere protection furnace according to claim 7, characterized in that: The refractory material is an anti-carburization brick.

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