Furnace end central tube mounting structure with good gas sealing effect

Abstract

The utility model relates to the technical field of furnace ends, in particular to a furnace end central tube mounting structure with a good gas sealing effect, which comprises a middle-layer stamping sheet and a central tube, a through hole is arranged on the middle-layer stamping sheet, the central tube comprises a tube part and a convex ring arranged at the lower end of the tube part, and the convex ring is welded below the through hole. The side wall of the through hole is provided with a flange extending upwards, and the flange is welded to the periphery of the pipe part. According to the central tube mounting structure, the turnup extending upwards is arranged on the side wall of the through hole, the turnup is welded on the periphery of the tube part, and the turnup and the welding surface on the convex ring are combined to form the L-shaped welding position, so that the gas sealing effect of the central tube mounting structure is improved, and the safety of the furnace end is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of furnace heads, in particular to a furnace head central tube installation structure with good gas sealing effect. Background Art

[0002] The furnace head generally includes an outer ejector tube, an inner ejector tube, a central tube and an outer sleeve. The central tube is connected with the inner ejector tube to form an inner ring air passage. The outer sleeve is arranged on the outer circumference of the central tube and forms an air cavity with the central tube. The air cavity is connected with the outer ejector tube to form an outer ring air passage.

[0003] The burner head disclosed in the patent with publication number CN212108387U has a burner head body comprising an upper stamping sheet, a middle stamping sheet and a lower stamping sheet which are spliced ​​in sequence vertically, a middle splicing groove of the base is provided on the middle stamping sheet, and a hollow inner sleeve (equivalent to a center tube) is fixedly installed in the middle of the middle splicing groove of the base. Figure 2 and Figure 3 This technology is achieved by setting a convex ring at the lower end of the hollow inner sleeve, setting a through hole in the middle of the middle splicing groove of the base, the hollow inner sleeve passes through the through hole from bottom to top, the convex ring abuts against the bottom of the through hole, and the upper end face of the convex ring is welded to the lower end face of the middle splicing groove of the base, thereby completing the installation of the hollow inner sleeve.

[0004] In actual use, since the connection surface between the hollow inner sleeve and the middle layer stamping sheet is limited to a single horizontal plane, the gas in the inner ring air duct can easily overflow from the connection surface, and the gas sealing effect and safety have room for improvement. Utility Model Content

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a furnace head central tube installation structure with good gas sealing effect.

[0006] The technical solution adopted by the utility model to solve the problem is:

[0007] A furnace head center tube installation structure with good gas sealing effect includes a middle layer stamping sheet and a center tube, the middle layer stamping sheet is provided with a through hole, the center tube includes a tube portion and a convex ring arranged at the lower end of the tube portion, the convex ring is welded below the through hole, and an upwardly extending flange is provided on the side wall of the through hole, and the flange is welded to the outer periphery of the tube portion.

[0008] As a further improvement of the above technical solution, the flange is perpendicular to the upper end surface of the middle-layer stamping sheet, the flange is ring-shaped, and the tube portion is transitionally matched with the flange.

[0009] As a further improvement of the above technical solution, a second inner ring splicing groove which is concave upward is provided on the middle layer stamping sheet, a step is provided at the front end portion of the second inner ring splicing groove, and the through hole is provided in the middle portion of the step; the outer diameter of the convex ring is larger than the diameter of the through hole, and the upper end face of the convex ring is welded to the lower end face of the step.

[0010] As a further improvement of the above technical solution, it also includes an upper stamping sheet and a lower stamping sheet, and the upper stamping sheet and the lower stamping sheet are detachably installed on the upper and lower sides of the middle stamping sheet.

[0011] As a further improvement of the above technical solution, a hollow outer sleeve is integrally provided on the upper stamping sheet, and the hollow outer sleeve surrounds the outer circumference of the central tube.

[0012] The beneficial effect of the utility model is that the utility model provides an upwardly extending flange on the side wall of the through hole, the flange is welded to the outer periphery of the tube part, and an L-shaped welding position is formed in combination with the welding surface on the convex ring, thereby improving the gas sealing effect of the central tube installation structure and improving the safety of the furnace head. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further explained below in conjunction with the accompanying drawings and specific implementation methods.

[0014] Figure 1 It is a structural sectional view of the utility model;

[0015] Figure 2 for Figure 1 A schematic diagram of the structure enlargement at the center A;

[0016] Figure 3 It is a schematic diagram of the structural decomposition of the utility model.

[0017] In the figure: 1-upper stamping sheet, 11-first inner ring splicing groove, 12-first outer ring splicing groove, 13-hollow outer sleeve, 2-middle stamping sheet, 21-second inner ring splicing groove, 22-step, 23-through hole, 231-flanging, 3-lower stamping sheet, 31-third inner ring splicing groove, 32-second outer ring splicing groove, 4-center tube, 41-tube part, 42-convex ring, 43-second inner ring air duct, 5-first inner ring air duct, 6-second outer ring air duct. DETAILED DESCRIPTION

[0018] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0019] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 invention.

[0020] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0021] Reference Figures 1 to 3 A furnace head center tube installation structure with good gas sealing effect comprises an upper stamping sheet 1, a middle stamping sheet 2, a lower stamping sheet 3 and a center tube 4, wherein the middle stamping sheet 2 is provided with a through hole 23, and the center tube 4 comprises a tube portion 41 and a convex ring 42 integrally provided at the lower end of the tube portion 41, wherein the convex ring 42 is welded below the through hole 23, and an upwardly extending flange 231 is provided on the side wall of the through hole 23, wherein the flange 231 is annular and welded to the outer periphery of the tube portion 41. Thus, an L-shaped welding position is formed, thereby improving the gas sealing effect of the center tube 4 installation structure and improving the safety of the furnace head.

[0022] In a preferred embodiment, the flange 231 is perpendicular to the upper end surface of the middle layer stamping sheet 2, and the tube portion 41 is transitionally matched with the flange 231, so that the flange 231 is tightly attached to the tube portion 41, increasing the contact area and further improving the air sealing effect.

[0023] Specifically, in some embodiments, the lower stamping sheet 3 is provided with a third inner ring splicing groove 31 which is concave downward, the middle stamping sheet 2 is provided with a second inner ring splicing groove 21 which is concave upward, and the upper stamping sheet 1 is provided with a first inner ring splicing groove 11 which is concave upward. The first inner ring splicing groove 11, the second inner ring splicing groove 21 and the third inner ring splicing groove 31 are assembled into a first inner ring air duct 5, and the middle part of the center tube 4 passes through to form a second inner ring air duct 43, and the first inner ring air duct 5 and the second inner ring air duct 43 are connected to form a complete inner ring air duct; further, the front end portion of the second inner ring splicing groove 21 is provided with a step 22, and the through hole 23 is provided at the center of the step 22; the outer diameter of the convex ring 42 is larger than the diameter of the through hole 23, and the upper end face of the convex ring 42 is welded to the lower end face of the step 22, so that the first inner ring air duct 5 is connected to the second inner ring air duct 43.

[0024] Furthermore, in some embodiments, a hollow outer sleeve 13 and a first outer ring splicing groove 12 are integrally provided on the upper stamping sheet 1, and a second outer ring splicing groove 32 is integrally provided on the lower stamping sheet 3. The second outer ring splicing groove 32 is spliced ​​with the first outer ring splicing groove 12 to form a first outer ring air duct. The hollow outer sleeve 13 surrounds the outer circumference of the central tube 4. There is a gap between the hollow outer sleeve 13 and the central tube 4 to form a second outer ring air duct 6. The first outer ring air duct is connected with the second outer ring air duct 6 to form a complete outer ring air duct.

[0025] In a preferred embodiment, the upper stamping sheet 1 and the lower stamping sheet 3 are detachably mounted on the upper and lower sides of the middle stamping sheet 2. During assembly, the central tube 4 can be first welded and fixed to the middle stamping sheet 2, and then matched with the upper stamping sheet 1 and the lower stamping sheet 3.

[0026] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the utility model concept, or directly or indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A furnace head central tube installation structure with good gas sealing effect, comprising a middle layer stamping sheet (2) and a central tube (4), wherein the middle layer stamping sheet (2) is provided with a through hole (23), and the central tube (4) comprises a tube portion (41) and a convex ring (42) arranged at the lower end of the tube portion (41), wherein the convex ring (42) is welded below the through hole (23), and characterized in that: A flange (231) extending upward is provided on the side wall of the through hole (23), and the flange (231) is welded to the outer periphery of the tube portion (41).

2. A furnace head central tube installation structure with good gas sealing effect as claimed in claim 1, characterized in that: The flange (231) is perpendicular to the upper end surface of the middle layer stamping sheet (2), the flange (231) is ring-shaped, and the tube portion (41) is transitionally matched with the flange (231).

3. A furnace head central tube installation structure with good gas sealing effect as claimed in claim 2, characterized in that: The middle layer punching sheet (2) is provided with a second inner ring splicing groove (21) which is recessed upwards, a step (22) is provided at the front end of the second inner ring splicing groove (21), and the through hole (23) is provided in the middle of the step (22); The outer diameter of the convex ring (42) is greater than the diameter of the through hole (23), and the upper end surface of the convex ring (42) is welded to the lower end surface of the step (22).

4. A furnace head central tube installation structure with good gas sealing effect as claimed in claim 3, characterized in that: It also comprises an upper stamping sheet (1) and a lower stamping sheet (3), wherein the upper stamping sheet (1) and the lower stamping sheet (3) are detachably mounted on the upper and lower sides of the middle stamping sheet (2).

5. A furnace head central tube installation structure with good gas sealing effect as claimed in claim 4, characterized in that: A hollow outer sleeve (13) is integrally provided on the upper stamping sheet (1), and the hollow outer sleeve (13) surrounds the outer circumference of the central tube (4).

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