Radial and axial adjustable flame preheating device

Abstract

The utility model provides a flame preheating device capable of being adjusted in the radial direction and the axial direction, and can solve the problems that an existing preheating device cannot be adjusted in the radial direction and the axial direction and is not suitable for preheating impellers of multiple specifications. The device comprises a circular gas pipe, a circular supporting pipe, at least three bidirectional adjusting units and a telescopic ventilation hose, the circular gas pipe and the circular supporting pipe are coaxially connected, each bidirectional adjusting unit comprises a first arc-shaped pipe, a U-shaped fixing seat, a U-shaped connecting piece and a connecting piece, and the U-shaped fixing seats are arranged on the circular supporting pipe; a plurality of through holes which are arranged up and down are formed in the edges of the two sides of two side plates of the U-shaped connecting piece, long-strip-shaped holes are formed in the two opposite side walls of the U-shaped connecting piece in the extending direction, and the U-shaped connecting piece is detachably connected into a U-shaped groove of the U-shaped fixing base after the connecting piece penetrates through the through holes and the long-strip-shaped holes. The U-shaped connecting piece can be adjusted in the axial direction and the radial direction by adjusting the connecting piece to penetrate through the through holes and the long-strip-shaped holes in different positions, and the first arc-shaped pipe is fixedly connected to the inner end of the U-shaped connecting piece.

Description

Technical Field

[0001] The utility model relates to a flame preheating device, in particular to a flame preheating device adjustable in both radial and axial directions. Background Art

[0002] The impellers of large fans and sintering machines are usually made of high-strength structural steel. Therefore, before welding the impeller with other components, flame preheating is required. Currently, a manual flame gun is usually used to preheat impellers of different specifications, but this method has low efficiency and poor safety.

[0003] Chinese Patent with the publication number CN206986242U discloses a preheating tooling for circumferential welding of large cylindrical bodies. The tooling includes an annular steel pipe, nozzles, and an air inlet valve. The annular steel pipe is composed of 2-3 arc-shaped steel pipe segments. One end of each arc-shaped steel pipe segment is provided with a plug plate, and the other end bends inward. The air inlet valve is installed on the bent section. A plurality of nozzle mounting holes are evenly arranged on the annular steel pipe, and the nozzles are installed on the annular steel pipe through the nozzle mounting holes. There are 4 spray holes around the nozzles. However, the problems of this preheating tooling are that it is not adjustable in both radial and axial directions and is not suitable for preheating impellers of multiple specifications. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the technical problem that the existing preheating device is not adjustable in both radial and axial directions and is not suitable for preheating impellers of multiple specifications, and to provide a flame preheating device adjustable in both radial and axial directions.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A flame preheating device adjustable in both radial and axial directions is characterized in that:

[0007] It includes a circular gas pipe, a circular support pipe, at least three bidirectional adjustment units, and a telescopic ventilation hose;

[0008] The circular gas pipe is coaxially connected to the circular support pipe through a plurality of connecting pipes, and the circular gas pipe is located above the circular support pipe; the circular gas pipe is externally connected to a gas supply source;

[0009] The at least three bidirectional adjustment units are circumferentially and evenly distributed on the circular support pipe. Each bidirectional adjustment unit includes a first arc-shaped pipe with both ends sealed, a U-shaped fixing seat with an upward opening, a U-shaped connecting piece, and two connecting pieces;

[0010] The U-shaped fixing seat is arranged on the circular support pipe. A plurality of through holes arranged vertically are provided at both side edges of the two side plates in the U-shaped fixing seat;

[0011] One long hole is provided on each of the two opposite side walls of the U-shaped connecting piece along the extending direction;

[0012] After the two connecting pieces respectively pass through the through hole and the long hole, the U-shaped connecting piece is detachably connected in the U-shaped groove of the U-shaped fixing seat. By adjusting the connecting pieces to pass through the through holes and the long holes at different positions, the U-shaped connecting piece can be adjusted in both the axial and radial directions;

[0013] The first arc-shaped pipe is fixedly connected to the inner end of the U-shaped connecting piece. Ventilation holes are provided on the inner arc surface of the first arc-shaped pipe. At least three first arc-shaped pipes together form a circular preheating area for preheating the impeller;

[0014] Both ends of the ventilation hose are respectively communicated with the first arc-shaped pipe and the circular gas pipe, and the ventilation hose is located in the U-shaped groove of the U-shaped connecting piece.

[0015] Further, the diameter of the circular gas pipe is larger than the diameter of the circular support pipe.

[0016] Further, at least three rollers are evenly distributed on the circular support pipe.

[0017] Further, the circular support pipe is formed by combining at least three second arc-shaped pipes;

[0018] The middle parts of the two side plates of each U-shaped fixing seat are respectively connected to the ends of two adjacent second arc-shaped pipes.

[0019] Further, the number of the bidirectional adjusting units, the ventilation hoses, the connecting pipes and the second arc-shaped pipes is twenty; the bidirectional adjusting units and the connecting pipes are arranged at intervals;

[0020] Five ventilation holes are evenly distributed along the circumferential direction on the inner arc surface of the first arc-shaped pipe;

[0021] The number of the rollers is four;

[0022] The U-shaped connecting piece is U-shaped square steel.

[0023] Further, the circular gas pipe, the circular support pipe and the first arc-shaped pipe are all seamless steel pipes;

[0024] The connecting pipe is a steel pipe.

[0025] The beneficial effects of the present utility model:

[0026] 1. The present utility model provides a flame preheating device that can be adjusted in both the radial and axial directions. The device has the function of two-way adjustment in the radial and axial directions, can realize the preheating of impellers of different specifications and sizes, and has low cost, high efficiency, good preheating uniformity and safety compared with the manual preheating method.

[0027] 2. In the present utility model, the diameter of the circular gas pipe is larger than that of the circular support pipe. In combination with the connecting pipe, it is beneficial to the placement stability of the entire device. At the same time, during the use process, the safety distance between the circular gas pipe and the open flame at the first arc-shaped pipe can be enlarged. The rollers in the present utility model can enable the entire preheating device to rotate easily. In order to further improve the uniformity of impeller preheating, five ventilation holes are evenly distributed along the circumferential direction on the inner arc surface of the first arc-shaped pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 FIG. 6 is a schematic perspective view of an embodiment of a flame preheating device with adjustable radial and axial directions of the present utility model;

[0029] Figure 2 FIG. Figure 1 is a partially enlarged view of FIG.

[0030] Figure 3 FIG. Figure 1 is a top view of FIG.

[0031] Figure 4 FIG. 22 is a schematic perspective view of the U-shaped fixing seat in the embodiment of the present utility model;

[0032] Figure 5 FIG. 26 is a schematic perspective view of the U-shaped connecting piece in the embodiment of the present utility model.

[0033] DESCRIPTION OF THE REFERENCE NUMERALS:

[0034] 1 - circular gas pipe, 2 - circular support pipe, 20 - second arc-shaped pipe, 3 - bidirectional adjustment unit, 30 - U-shaped fixing seat, 31 - U-shaped connecting piece, 32 - first arc-shaped pipe, 33 - ventilation hose, 34 - connecting piece, 4 - connecting pipe, 5 - through hole, 6 - long slot, 7 - ventilation hole, 8 - roller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] As Figures 1-5As shown in the figure, a flame preheating device that can be adjusted both radially and axially includes a circular gas pipe 1, a circular support pipe 2, twenty bidirectional adjustment units 3, and twenty telescopic ventilation hoses 33. Specifically, the circular gas pipe 1 is coaxially connected to the circular support pipe 2 through twenty connecting pipes 4, and the circular gas pipe 1 is located above the circular support pipe 2. The circular gas pipe 1 is externally connected to a gas supply source. The diameter of the circular gas pipe 1 is larger than that of the circular support pipe 2. Four rollers 8 are evenly distributed on the circular support pipe 2. In this embodiment, the circular support pipe 2 is formed by combining twenty second arc-shaped pipes 20. The twenty bidirectional adjustment units 3 are evenly distributed along the circumference on the circular support pipe 2, and the twenty bidirectional adjustment units 3 and the twenty connecting pipes 4 are arranged at intervals. Each bidirectional adjustment unit 3 includes a first arc-shaped pipe 32 with both ends sealed, a U-shaped fixing seat 30 with an upward opening, a U-shaped connecting piece 31, and two connecting pieces 34. Among them, the middle parts of the two side plates of each U-shaped fixing seat 30 are respectively welded to the ends of two adjacent second arc-shaped pipes 20. Twelve through holes 5 arranged vertically are provided at both side edges of the two side plates in the U-shaped fixing seat 30. A long hole 6 is provided along the extending direction on each of the two opposite side walls of the U-shaped connecting piece 31. After the two connecting pieces 34 respectively pass through the through holes 5 and the long holes 6, the U-shaped connecting piece 31 is detachably connected to the U-shaped groove of the U-shaped fixing seat 30. By adjusting the connecting pieces 34 to pass through the through holes 5 and the long holes 6 at different positions, the U-shaped connecting piece 31 can be adjusted in both the axial and radial directions. The first arc-shaped pipe 32 is fixedly connected to the inner end of the U-shaped connecting piece 31. In order to achieve good preheating uniformity, five ventilation holes 7 are evenly distributed along the circumference on the inner arc surface of the first arc-shaped pipe 32. The twenty first arc-shaped pipes 32 together form a circular preheating area for preheating the impeller. The two ends of the ventilation hose 33 are respectively communicated with the first arc-shaped pipe 32 and the circular gas pipe 1, and the ventilation hose 33 is located in the U-shaped groove of the U-shaped connecting piece 31. In this embodiment, the U-shaped connecting piece 31 is a U-shaped square steel, the circular gas pipe 1, the circular support pipe 2, and the first arc-shaped pipe 32 are all seamless steel pipes, the connecting pipe 4 is a steel pipe, and the connecting piece 34 is a bolt.

[0036] As described above, the above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A flame preheating device adjustable in both radial and axial directions, characterized in that: It includes a circular gas pipe (1), a circular support pipe (2), at least three bidirectional adjustment units (3) and a telescopic ventilation hose (33); The circular gas pipe (1) is coaxially connected to the circular support pipe (2) through a plurality of connecting pipes (4), and the circular gas pipe (1) is located above the circular support pipe (2); the circular gas pipe (1) is externally connected to a gas supply source; The at least three bidirectional adjustment units (3) are circumferentially distributed on the circular support pipe (2), and each bidirectional adjustment unit (3) includes a first arc-shaped pipe (32) with both ends sealed, a U-shaped fixing seat (30) and a U-shaped connecting piece (31) with an upward opening, and two connecting pieces (34); The U-shaped fixing seat (30) is arranged on the circular support pipe (2), and a plurality of through holes (5) arranged vertically are provided at both side edges of the two side plates in the U-shaped fixing seat (30); One long hole (6) is arranged along the extending direction on each of the two opposite side walls of the U-shaped connecting piece (31); After the two connecting pieces (34) respectively pass through the through holes (5) and the long holes (6), the U-shaped connecting piece (31) is detachably connected in the U-shaped groove of the U-shaped fixing seat (30). By adjusting the connecting pieces (34) to pass through the through holes (5) and the long holes (6) at different positions, the U-shaped connecting piece (31) is adjustable in both axial and radial directions; The first arc-shaped pipe (32) is fixedly connected to the inner end of the U-shaped connecting piece (31), and ventilation holes (7) are arranged on the inner arc surface of the first arc-shaped pipe (32). At least three first arc-shaped pipes (32) together form a circular preheating area for preheating the impeller; Both ends of the ventilation hose (33) are communicated with the first arc-shaped pipe (32) and the circular gas pipe (1) respectively, and the ventilation hose (33) is located in the U-shaped groove of the U-shaped connecting piece (31).

2. The flame preheating device adjustable in both radial and axial directions according to claim 1, characterized in that: The diameter of the circular gas pipe (1) is larger than the diameter of the circular support pipe (2).

3. The flame preheating device adjustable in both radial and axial directions according to claim 1 or 2, characterized in that: At least three rollers (8) are evenly distributed on the circular support pipe (2).

4. The flame preheating device adjustable in both radial and axial directions according to claim 3, characterized in that: The circular support pipe (2) is formed by combining at least three second arc-shaped pipes (20); The middle parts of the two side plates of each U-shaped fixing seat (30) are respectively connected to the ends of two adjacent second arc-shaped pipes (20).

5. The flame preheating device adjustable in both radial and axial directions according to claim 4, characterized in that: The number of the bidirectional adjustment units (3), the ventilation hoses (33), the connecting pipes (4) and the second arc-shaped pipes (20) is all twenty; the bidirectional adjustment units (3) and the connecting pipes (4) are arranged at intervals; Five ventilation holes (7) are evenly distributed along the circumferential direction on the inner arc surface of the first arc-shaped pipe (32); The number of the rollers (8) is four; The U-shaped connecting piece (31) is a U-shaped square steel.

6. The axially and radially adjustable flame preheating device according to claim 5, wherein: The circular gas pipe (1), the circular support pipe (2) and the first arc-shaped pipe (32) are all seamless steel pipes; The connecting pipe (4) is a steel pipe.

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