Single-chamber low-pressure machine holding furnace

Abstract

The utility model belongs to the technical field of furnace bodies, and particularly relates to a heating furnace. A single-chamber low-pressure machine holding furnace comprises a furnace bottom, a furnace cover and a furnace wall located between the furnace bottom and the furnace cover, heating pipe assembly prefabricated parts corresponding to each other are arranged in wall bodies on the two opposite sides of the furnace wall, and the heating pipe assembly prefabricated parts and the furnace wall are poured into a whole; the heating pipe assembling prefabricated parts extend in the linear direction and are in a barrel shape, the heating pipe assembling prefabricated parts are provided with mounting holes which extend in the length direction of the heating pipe assembling prefabricated parts and are used for allowing heating pipes to be inserted, and the mounting holes of the two heating pipe assembling prefabricated parts are coaxially arranged. The utility model has the advantages of avoiding the inward shrinkage of the mounting hole and the cracking of the furnace wall, and prolonging the service life of the furnace body.

Description

Technical Field

[0001] The utility model belongs to the technical field of furnace bodies, and in particular relates to a heating furnace. Background Art

[0002] The single-chamber low-pressure machine insulation furnace includes a furnace cover, a furnace bottom, and a furnace wall located between the furnace cover and the furnace bottom; a single chamber for placing and insulating aluminum liquid is formed by enclosing the furnace wall, the furnace cover, and the furnace bottom. A mounting hole for inserting a heating pipe is provided in the furnace wall, a heating pipe is inserted in the mounting hole, and a heating rod is inserted in the heating pipe. The inner wall of the furnace wall reflects the heat of the heating rod so that the interior of the furnace wall is heated as a whole to insulate the aluminum liquid. The conventional furnace wall and the casting of the mounting hole are integral casting, that is, the plastic pipe is first fixed on the furnace wall mold, and then the casting material is injected into the furnace wall mold, the plastic pipe forms the mounting hole, and then the plastic pipe is removed and the heating pipe is inserted into the mounting hole, and the heating rod is inserted into the heating pipe. However, during the long-term use of the furnace body, the installation holes will be carbonized due to high temperature, resulting in the reduction of the aperture of the installation holes, causing the positions of the installation holes on both sides to shift, making it difficult to remove the heating tube and heating rod from the installation holes, and even breaking in the furnace body; at the same time, high temperature will cause the furnace wall to crack during use, resulting in a shorter service life of the entire furnace body. Utility Model Content

[0003] The utility model aims to provide a single-chamber low-pressure machine insulation furnace which can avoid shrinkage of mounting holes and cracking of furnace walls and prolong the service life of the furnace body.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a single-chamber low-pressure machine insulation furnace, comprising a furnace bottom, a furnace cover and a furnace wall located between the furnace bottom and the furnace cover, wherein corresponding heating tube assembly prefabricated parts are arranged in the walls on opposite sides of the furnace wall, and the heating tube assembly prefabricated parts are cast into one piece with the furnace wall; the heating tube assembly prefabricated parts extend in a straight direction and are cylindrical, and the heating tube assembly prefabricated parts are provided with mounting holes extending along the length direction of the heating tube assembly prefabricated parts and used for inserting the heating tube, and the mounting holes of the two heating tube assembly prefabricated parts are coaxially arranged.

[0005] When pouring the furnace wall, first fix the heating tube assembly prefabricated part in the mold of the furnace wall by means of water stop screws, and then pour the furnace wall so that the heating tube assembly prefabricated part is located in the pouring material of the furnace wall. After the pouring slurry hardens, the heating tube assembly prefabricated part and the furnace wall are formed as one piece. The heating tube assembly prefabricated part is made of high temperature resistant material, and the mounting hole is arranged in the heating tube assembly prefabricated part, so as to reduce the possibility of high temperature carbonization of the mounting hole, so that the heating tube and the heating rod can be smoothly taken out from the mounting hole, which is convenient for the replacement of the heating tube and the heating rod. At the same time, the heating tube assembly prefabricated part separates the heating rod from the furnace wall, so as to avoid cracking of the furnace wall, thereby extending the service life of the furnace body. Among them, the heating tube assembly prefabricated part can be made of materials such as silicon carbide and aluminum oxide, for example, it is made of Inside FOSINCAST-90 material, whose main component is aluminum oxide, and the maximum working temperature is 1600℃.

[0006] Preferably, a plurality of laterally open grooves are provided on the circumferential outer wall of the heating tube assembly preform, and adjacent grooves are spaced apart along the length direction of the heating tube assembly preform; the grooves extend along the circumferential direction of the heating tube assembly preform.

[0007] By providing the grooves, the casting material of the furnace wall can enter the grooves during casting, thereby improving the sealing of the entire furnace wall and preventing the heating tube assembly prefabricated parts from being displaced relative to the furnace wall.

[0008] Preferably, the longitudinal section of the heating tube assembly preform is rectangular.

[0009] The rectangular heating tube assembly prefabricated part can facilitate the installation and positioning of the heating tube assembly prefabricated part when it is assembled with the furnace wall mold.

[0010] Preferably, a plurality of through grooves arranged at annular intervals and extending along the axial direction of the mounting hole are provided on the inner wall of the mounting hole of the heating tube assembly preform.

[0011] The problem of shrinkage of the mounting hole can be further avoided by providing a through slot.

[0012] Preferably, the through grooves are evenly spaced in a ring shape with the center of the mounting hole as the center.

[0013] The rings are evenly spaced so that even if the heating tube assembly prefabricated part has slight shrinkage after long-term use, the installation holes can still maintain a good hole shape.

[0014] Preferably, the furnace wall comprises a heat insulation layer and a working layer from the outside to the inside, the heat insulation layer is made of non-furnace wall casting material, the working layer is made of furnace wall casting material, the heat insulation layer is provided with a positioning groove opening to the inner side of the furnace body, and the outer part of the heating tube assembly prefabricated part is located in the positioning groove.

[0015] Before pouring the working layer of the furnace wall, a part of the heating pipe assembly prefabricated part is embedded in the positioning groove, so as to pre-position the heating pipe assembly prefabricated part, thereby ensuring that the installation holes of the heating pipe assembly prefabricated parts on both sides are concentrically arranged. At the same time, the positioning groove is only opened to the inside, which can limit the outward movement of the heating pipe assembly prefabricated part. Among them, the heat insulation layer is located on the outside of the furnace wall mold before pouring the furnace wall. The heat insulation layer can be the heat insulation layer of any existing heating furnace.

[0016] Preferably, the circumferential outer wall surface of the heating tube assembly prefabricated part located on the inner side of the furnace wall is an inclined surface, and the width of the part of the heating tube assembly prefabricated part located on the inner side of the furnace wall gradually decreases from the outside to the inside.

[0017] Through the above arrangement, after the furnace wall is poured and solidified, the inner side of the furnace wall can limit the inward movement of the heating tube assembly prefabricated parts, thereby making the fixation between the heating tube assembly prefabricated parts and the furnace wall more secure.

[0018] The utility model has the following advantages: by arranging a high temperature resistant heating tube assembly prefabricated part, the problem of shrinkage hole in the installation hole due to high temperature carbonization is avoided, thereby facilitating the replacement of the heating tube and the heating rod; it can also avoid cracking of the furnace wall, thereby extending the service life of the furnace body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the furnace body of the utility model.

[0020] Figure 2 This is a cross-sectional view of the prefabricated parts of the furnace body and heating tube assembly of the utility model.

[0021] Figure 3 This is a cross-sectional view of the prefabricated parts of the furnace body and heating tube assembly of the utility model.

[0022] Figure 4 Schematic diagram of the structure for assembling prefabricated parts for heating pipes.

[0023] Figure numbers: furnace body 1, furnace cover 2, furnace bottom 3, furnace wall 4, first working layer 51, second working layer 52, insulation layer 53, ceramic plate layer 54, heating tube assembly prefabricated part 6, groove 61, through groove 62, mounting hole 63, inclined surface 64, heating tube 100, heating rod 200. DETAILED DESCRIPTION

[0024] The utility model is further described below based on the accompanying drawings and specific embodiments.

[0025] like Figures 1 to 3As shown, this embodiment discloses a single-chamber low-pressure machine insulation furnace, including a furnace body 1, the furnace body 1 including a furnace cover 2, a furnace bottom 3 and a furnace wall 4 located between the furnace cover 2 and the furnace bottom 3. The furnace wall 4 includes a ceramic plate layer 54, a heat insulation layer 53 and a working layer from the outside of the furnace body 1 to the inside of the furnace body 1; the ceramic plate layer 54 and the heat insulation layer 53 are made of non-furnace wall casting materials, and the working layer is made of furnace wall casting materials. The working layer includes a second working layer 52 and a first working layer 51 from the outside of the furnace body 1 to the inside of the furnace body 1. The second working layer 52 and the first working layer 51 use different furnace wall casting materials. The second working layer 52 is an impermeable layer, and the first working layer 51 is a heat conductive layer and is used to contact with aluminum liquid. Heating pipe assembly prefabricated parts 6 are fixed on the furnace walls 4 on opposite sides, and the two heating pipe assembly prefabricated parts 6 correspond to each other. There are a total of six heating pipe assembly prefabricated parts 6 on the two furnace walls of this embodiment, so that three heating pipes 100 can be inserted. The outside of the heating tube assembly prefabricated part 6 is embedded in the heat insulation layer 53, and the middle and inside of the heating tube assembly prefabricated part 6 are located in the second working layer 52 and the first working layer 51, that is, the heating tube assembly prefabricated part 6 is located in the casting material. The heat insulation layer 53 is provided with a positioning groove (not shown in the figure) opening to the inside of the furnace body 1, and the outer part of the heating tube assembly prefabricated part 6 is located in the positioning groove, and the inner wall of the positioning groove contacts the outer wall of the heating tube assembly prefabricated part 6.

[0026] The heating tube assembly preform 6 is made of Inside FOSINCAST-90 material, the main components of which are 88% aluminum oxide and 4.3% silicon dioxide, and the maximum working temperature is 1600° C. The first working layer 51 is made of ALULOC-84SR material, the main components of which are 82% aluminum oxide and 10% silicon dioxide, and the maximum working temperature is 1100° C.

[0027] like Figure 3 and Figure 4 As shown, the heating tube assembly preform 6 extends in a straight direction and is cylindrical. The heating tube assembly preform 6 is provided with a mounting hole 63 extending in the length direction of the heating tube assembly preform, and the mounting holes 63 of the two heating tube assembly preforms 6 are coaxially arranged. The longitudinal section of the heating tube assembly preform 6 is rectangular, and there are two side opening grooves 61 on the circumferential outer wall of the heating tube assembly preform 6. The grooves 61 extend in the circumferential direction of the heating tube assembly preform 6 and the longitudinal section is also rectangular. The two grooves 61 are spaced apart along the length direction of the heating tube assembly preform 6. One groove 61 is connected to the first working layer 51, and the other groove 61 is connected to the second working layer 52. The inner wall of the mounting hole 63 is provided with six through grooves 62 arranged in an annular manner with the center of the mounting hole 63 as the center, and the through grooves 62 extend in the axial direction of the mounting hole 63. The circumferential outer wall surface of the heating tube assembly preform 6 located inside the furnace wall 4 is an inclined surface 64, and the width of the portion of the heating tube assembly preform 6 located inside the furnace wall gradually decreases from the outside to the inside.

[0028] When casting the heating tube assembly prefabricated part 6 and the furnace wall 4, first embed the heating tube assembly prefabricated part 6 into the positioning groove of the heat insulation layer 53, then fix the heating tube assembly prefabricated part 6 on the mold of the furnace wall 4 with a water stop screw, and then inject the casting material of the first working layer 51 and the second process layer 52. After the casting material is solidified, insert the heating tube 100 into the installation hole 63 of the heating tube assembly prefabricated part 6, and then insert the heating rod 200 into the heating tube 100. When replacing the heating tube 100 or the heating rod 200, directly pull out the heating tube 100 or the heating rod 200.

Claims

1. A single-chamber low-pressure machine insulation furnace, comprising a furnace bottom, a furnace cover and a furnace wall located between the furnace bottom and the furnace cover, characterized in that: Mutually corresponding heating tube assembly prefabricated parts are arranged in the walls on opposite sides of the furnace wall, and the heating tube assembly prefabricated parts are cast as one piece with the furnace wall; the heating tube assembly prefabricated parts extend in a straight direction and are cylindrical, and the heating tube assembly prefabricated parts are provided with mounting holes extending along the length direction of the heating tube assembly prefabricated parts and used for inserting the heating tubes, and the mounting holes of the two heating tube assembly prefabricated parts are coaxially arranged.

2. The single-chamber low-pressure machine holding furnace according to claim 1, characterized in that: A plurality of grooves with side openings are arranged on the circumferential outer wall of the heating tube assembly preform, and two adjacent grooves are arranged at intervals along the length direction of the heating tube assembly preform; the grooves extend along the circumferential direction of the heating tube assembly preform.

3. The single-chamber low-pressure machine holding furnace according to claim 1, characterized in that: The longitudinal section of the heating tube assembly preform is in a rectangular shape.

4. The single-chamber low-pressure machine holding furnace according to claim 1, characterized in that: The inner wall of the mounting hole of the heating tube assembly prefabricated part is provided with a plurality of through grooves which are arranged at annular intervals and extend along the axial direction of the mounting hole.

5. The single-chamber low-pressure machine holding furnace according to claim 4, characterized in that: The through grooves are arranged in a ring shape with the center of the mounting hole as the center and are evenly spaced.

6. The single-chamber low-pressure machine holding furnace according to any one of claims 1 to 5, characterized in that: The furnace wall includes a heat insulation layer and a working layer from the outside to the inside, the heat insulation layer is made of non-furnace wall casting material, the working layer is made of furnace wall casting material, the heat insulation layer is provided with a positioning groove opening to the inner side of the furnace body, and the outer side part of the heating tube assembly prefabricated part is located in the positioning groove.

7. The single-chamber low-pressure machine holding furnace according to any one of claims 1 to 5, characterized in that: The circumferential outer wall surface of the heating tube assembly prefabricated part located on the inner side of the furnace wall is an inclined surface, and the width of the part of the heating tube assembly prefabricated part located on the inner side of the furnace wall gradually decreases from the outside to the inside.

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