Furnace cover sealing head structure of ultra-deep well type nitriding furnace

Abstract

The utility model relates to the technical field of nitriding furnaces, in particular to a furnace cover sealing head structure of an ultra-deep well type nitriding furnace. The furnace cover comprises a furnace cover body, a center hole used for installing a fan is formed in the middle of the furnace cover body, an annular fixing plate is arranged on the inner wall of the center hole, the lower end of the annular fixing plate extends below the furnace cover body, and an annular special-shaped sealing plate is arranged at the lower end of the annular fixing plate and the position, close to the outer edge, of the lower surface of the furnace cover body. The special-shaped sealing plate is horizontally arranged from one side to the other side of the special-shaped sealing plate connected with the annular fixing plate, then inclines downwards, is bent to the upper portion in an arc transition mode and then is connected with the lower surface of the furnace cover, and a cavity defined by the special-shaped sealing plate, the annular fixing plate and the furnace cover is filled with heat insulation cotton. The device solves the problem that wind resistance is formed.

Description

Technical Field

[0001] The utility model relates to the technical field of nitriding furnaces, in particular to a furnace cover head structure of an ultra-deep well type nitriding furnace. Background Art

[0002] Existing furnace cover heads can be divided into the following types: round heads and elliptical heads. The round head is the most commonly used boiler head, and its shape is a convex hemispherical shape. The elliptical head is elliptical in shape, but they both form wind resistance. Utility Model Content

[0003] In order to solve the problems in the related art, the utility model provides a furnace cover head structure of an ultra-deep well nitriding furnace, and the device solves the problem of wind resistance.

[0004] In order to solve the above problems, the following technical solutions are provided:

[0005] The furnace cover head structure of the ultra-deep well nitriding furnace of the utility model includes a furnace cover, a center hole for installing a fan is arranged in the middle of the furnace cover, an annular fixing plate is arranged on the inner wall of the center hole, the lower end of the annular fixing plate extends under the furnace cover, and an annular special-shaped sealing plate is arranged at the position of the lower end of the annular fixing plate and the lower surface of the furnace cover near the outer edge. The special-shaped sealing plate connected to the annular fixing plate is first arranged horizontally from one side to the other side, first arranged horizontally, then inclined downward, and finally bent in an arc shape to the top and connected to the lower surface of the furnace cover, and the cavity surrounded by the special-shaped sealing plate, the annular fixing plate and the furnace cover is filled with heat insulation cotton.

[0006] In the above scheme, by setting the special-shaped sealing plate, the wind circulates under the special-shaped sealing plate without dead corners. The arc-shaped setting of the special-shaped sealing plate can reduce wind loss, thereby solving the problem of wind resistance. The thermal insulation cotton is used for thermal insulation, which effectively prevents heat transfer and has a good thermal insulation effect.

[0007] The special-shaped sealing plate includes an inclined sealing plate, an arc-shaped sealing plate and a straight sealing plate. The straight sealing plate is arranged horizontally, and one end of the straight sealing plate is connected to the lower end of the annular fixed plate. The horizontal section of the arc-shaped sealing plate is arranged downwardly inclined and then bent upward in an arc shape. The upper end of the arc-shaped sealing plate is connected to the inclined sealing plate, and the lower end of the arc-shaped sealing plate is connected to the straight sealing plate.

[0008] In the above scheme, by providing a straight sealing plate, an arc-shaped sealing plate and an inclined sealing plate, the structure is simple, only one arc-shaped sealing plate is needed, the manufacturing cost is low, and the installation is convenient.

[0009] A connecting block is welded at a position below the outer edge of the furnace cover, and a groove is provided on the lower end of the connecting block away from the annular fixing plate. The upper end of the inclined sealing plate is located in the groove, the top of the inclined sealing plate is connected to the groove by welding, and the inner side of the inclined sealing plate is connected to the bottom of the connecting block by welding.

[0010] In the above scheme, the connecting block is provided, and the oblique sealing plate is welded to the connecting block, and the welding is firm.

[0011] The upper end of the arc-shaped sealing plate is located outside the lower end of the inclined sealing plate in a fixed sealing connection, and the lower end of the arc-shaped sealing plate abuts against an end of the straight sealing plate away from the annular fixed plate in a fixed sealing connection.

[0012] In the above scheme, the arc-shaped sealing plate is arranged, the upper end of the arc-shaped sealing plate is located outside the lower end of the inclined sealing plate, and the welding point is on the outside, which is convenient for welding.

[0013] One side of the straight sealing plate is against the annular fixing plate, and the inner and outer sides of the straight sealing plate are welded to the annular fixing plate.

[0014] In the above scheme, by setting the direct sealing plate, there are welds on both the inner and outer sides of the direct sealing plate, and the welding strength is high.

[0015] The above solution has the following advantages:

[0016] 1. Since the furnace cover head structure of the ultra-deep well nitriding furnace of the utility model includes a furnace cover, a center hole for installing a fan is arranged in the middle of the furnace cover, and an annular fixing plate is arranged on the inner wall of the center hole, and the lower end of the annular fixing plate extends under the furnace cover, and an annular special-shaped sealing plate is arranged at the position where the lower end of the annular fixing plate and the lower surface of the furnace cover are close to the outer edge, and one end of the special-shaped sealing plate connected to the annular fixing plate is first arranged horizontally, then tilted downward, and finally bent upward in an arc transition and connected to the lower surface of the furnace cover, and the cavity surrounded by the special-shaped sealing plate, the annular fixing plate and the furnace cover is filled with heat insulation cotton. Through the arrangement of the special-shaped sealing plate, the wind circulates under the special-shaped sealing plate without dead angles, and the arc-shaped arrangement of the special-shaped sealing plate can reduce the loss of wind and will not form wind resistance. The heat insulation cotton is used for heat insulation, which effectively prevents heat transfer and has a good thermal insulation effect.

[0017] 2. The special-shaped sealing plate includes an inclined sealing plate, an arc-shaped sealing plate and a straight sealing plate, which have a simple structure. Only one arc-shaped sealing plate is needed, the manufacturing cost is low, and the installation is convenient. A connecting block is welded at the position below the outer edge of the furnace cover. The inclined sealing plate is welded to the connecting block, and the welding is firm. The upper end of the arc-shaped sealing plate is located on the outside of the lower end of the inclined sealing plate to form a fixed sealing connection. The welding point is on the outside, which is convenient for welding. One side of the straight sealing plate is against the annular fixed plate. There are welds on the inside and outside of the straight sealing plate, and the welding strength is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the furnace cover head structure of the ultra-deep well nitriding furnace;

[0019] Figure 2 It is an enlarged schematic diagram of part A of the furnace cover head structure of the ultra-deep pit nitriding furnace;

[0020] Explanation of the reference numerals: 1. furnace cover; 2. annular fixing plate; 3. oblique sealing plate; 4. arc-shaped sealing plate; 5. straight sealing plate; 6. connecting block; 7. groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figures 1-2 As shown, the utility model includes a furnace cover 1, a center hole for installing a fan is provided in the middle of the furnace cover 1, an annular fixing plate 2 is provided on the inner wall of the center hole, the lower end of the annular fixing plate 2 extends under the furnace cover 1, and an annular special-shaped sealing plate is provided at the lower end of the annular fixing plate 2 and the position near the outer edge of the lower surface of the furnace cover 1. The special-shaped sealing plate connected to the annular fixing plate 2 is first arranged horizontally from one side to the other side, first arranged horizontally, then inclined downward, and finally bent in an arc shape to the top and connected to the lower surface of the furnace cover 1, and the cavity surrounded by the special-shaped sealing plate, the annular fixing plate 2 and the furnace cover 1 is filled with heat insulation cotton.

[0023] The special-shaped sealing plate includes an inclined sealing plate 3, an arc-shaped sealing plate 4 and a straight sealing plate 5. The straight sealing plate 5 is arranged horizontally, and one end of the straight sealing plate 5 is connected to the lower end of the annular fixed plate 2. The horizontal section of the arc-shaped sealing plate 4 is arranged tilted downward and then bent upward in an arc shape. The upper end of the arc-shaped sealing plate 4 is connected to the inclined sealing plate 3, and the lower end of the arc-shaped sealing plate 4 is connected to the straight sealing plate 5.

[0024] A connecting block 6 is welded at a position below the outer edge of the furnace cover 1. A groove 7 is provided on the lower end of the connecting block 6 away from the annular fixing plate 2. The upper end of the inclined sealing plate 3 is located in the groove 7. The top of the inclined sealing plate 3 is connected to the groove 7 by welding, and the inner side of the inclined sealing plate 3 is connected to the bottom of the connecting block 6 by welding.

[0025] The upper end of the arc-shaped sealing plate 4 is located outside the lower end of the inclined sealing plate 3 to form a fixed sealing connection, and the lower end of the arc-shaped sealing plate 4 abuts against the end of the straight sealing plate 5 away from the annular fixed plate 2 to form a fixed sealing connection.

[0026] One side of the straight sealing plate 5 abuts against the annular fixing plate 2 , and the inner and outer sides of the straight sealing plate 5 are welded to the annular fixing plate 2 .

[0027] First, weld the connecting block 6 to the position below the outer edge of the furnace cover 1, weld the upper end of the inclined sealing plate 3 against the groove 7 of the connecting block 6, weld the position where the inner side of the upper part of the inclined sealing plate 3 contacts the lower surface of the connecting block 6, and then weld the inner and outer sides of one end of the straight sealing plate 5 to the lower end of the annular fixing block, and finally weld the lower end of the arc sealing plate 4 against the straight sealing plate 5, and the upper end of the arc sealing plate 4 is located on the outer side of the lower end of the inclined sealing plate 3 and welded.

[0028] In the description of the present utility model, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 a limitation on the present utility model. In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A furnace cover (1) sealing structure of an ultra-deep pit nitriding furnace, characterized in that: The invention comprises a furnace cover (1), wherein a central hole for installing a fan is arranged in the middle of the furnace cover (1), an annular fixing plate (2) is arranged on the inner wall of the central hole, the lower end of the annular fixing plate (2) extends below the furnace cover (1), and an annular special-shaped sealing plate is arranged at a position near the outer edge of the lower end of the annular fixing plate (2) and the lower surface of the furnace cover (1). The special-shaped sealing plate connected to the annular fixing plate (2) is first arranged horizontally from one side to the other side, then tilted downward, and finally bent upward in an arc shape to be connected to the lower surface of the furnace cover (1), and the cavity surrounded by the special-shaped sealing plate, the annular fixing plate (2) and the furnace cover (1) is filled with heat insulation cotton.

2. The furnace cover (1) sealing structure of the ultra-deep pit nitriding furnace according to claim 1, characterized in that: The special-shaped sealing plate comprises an inclined sealing plate (3), an arc-shaped sealing plate (4) and a straight sealing plate (5); the straight sealing plate (5) is arranged horizontally, one end of the straight sealing plate (5) is connected to the lower end of the annular fixed plate (2) on all sides; the horizontal section of the arc-shaped sealing plate (4) is arranged downwardly inclined and then bent upwardly in an arc shape; the upper end of the arc-shaped sealing plate (4) is connected to the inclined sealing plate (3), and the lower end of the arc-shaped sealing plate (4) is connected to the straight sealing plate (5).

3. The furnace cover (1) sealing structure of the ultra-deep pit nitriding furnace according to claim 2, characterized in that: A connecting block (6) is welded to a position below the outer edge of the furnace cover (1); a groove (7) is formed on the lower end of the connecting block (6) away from the annular fixing plate (2); the upper end of the inclined sealing plate (3) is located in the groove (7) and is tilted downward; the top of the inclined sealing plate (3) is connected to the groove (7) by welding, and the inner side of the upper part of the inclined sealing plate (3) is connected to the bottom of the connecting block (6) by welding.

4. The furnace cover (1) sealing structure of the ultra-deep pit nitriding furnace according to claim 2, characterized in that: The upper end of the arc-shaped sealing plate (4) is located outside the lower end of the inclined sealing plate (3) in a fixed and sealed connection, and the lower end of the arc-shaped sealing plate (4) abuts against an end of the straight sealing plate (5) away from the annular fixed plate (2) in a fixed and sealed connection.

5. The furnace cover (1) sealing structure of the ultra-deep pit nitriding furnace according to claim 2, characterized in that: One side of the straight sealing plate (5) abuts against the annular fixing plate (2), and the inner and outer sides of the straight sealing plate (5) are welded to the annular fixing plate (2).

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