Improved multi-air-duct pulverized coal burner device

Abstract

The utility model discloses an improved multi-air-duct pulverized coal burner device which comprises an equipment pipeline and a plurality of coaxially-arranged air pipes, any two adjacent air pipes are connected through a wedge ring assembly, inner holes of the wedge ring assemblies are arranged on the air pipes in a sleeved mode, and the wedge ring assemblies are connected with the equipment pipeline. The outer ends of the wedge ring assemblies are tightly wedged in the adjacent air pipes, connecting blocks are arranged on the air pipe on the outermost side and the equipment pipeline, the cross section of each connecting block is in a right trapezoid shape, and the two connecting blocks are connected through a V-shaped clamp. The multi-air-duct burner has the advantages that the V-shaped clamp wedge-caulking connection mode is designed to replace a traditional welding and screwing connection mode, the end of the multi-air-duct burner can be replaced more quickly and conveniently, destructive disassembly is avoided, meanwhile, the multiple air ducts of the end are connected through the wedge ring assemblies, the air ducts can be replaced independently, and the replacement cost is reduced. All air pipes at the end do not need to be replaced due to damage of an external air pipe, and resources are saved.

Description

Technical field:

[0001] The utility model relates to the technical field of coal powder burners, in particular to an improved multi-air duct coal powder burner device. Background technology:

[0002] A multi-channel pulverized coal burner is a device that can fully burn pulverized coal in a short time and generate high-temperature vortexes. It can generate high-temperature vortexes in pulverized coal in a short time, and has the characteristics of complete combustion and high heat utilization rate. The multi-channel pulverized coal burner is the core equipment of the drum-type semi-coke drying kiln. When in use, the end of the multi-channel pulverized coal burner is inserted into the drying drum to fully mix the pulverized coal, air, gasoline, etc. to provide fuel for the drying kiln. Since the temperature in the drying kiln is as high as thousands of degrees and the working environment is harsh, the end of the multi-channel pulverized coal burner has a short service life and needs to be replaced regularly. In the prior art, the ends of multi-duct pulverized coal burners are mostly installed by welding or bolting. The welding method is not convenient for disassembly, and destructive disassembly is required for maintenance. The parts connected to the ends need to be replaced together, which is costly. The bolt connection method is easy to deform the threaded holes due to the high temperature environment, and the bolts are difficult to remove during disassembly, making disassembly difficult. At the same time, in the prior art, since the outermost duct pipe of the pulverized coal burner is exposed in the rotary kiln, the end damage is usually located in the outermost layer, while the inner layer of the pipe is not damaged. Replacing all the pipes is a waste of resources and needs to be improved urgently. Utility model content:

[0003] The utility model aims to provide an improved multi-duct pulverized coal burner device to solve the technical problems that the end of the existing multi-duct pulverized coal burner device is difficult to disassemble and only the external pipeline of the end is damaged, and replacing all the air ducts of the end is a waste of resources.

[0004] The content of the utility model: an improved multi-air duct pulverized coal burner device, which includes an equipment pipeline and a plurality of coaxially arranged air ducts, any two adjacent air ducts are connected by a wedge ring assembly, the inner hole of the wedge ring assembly is sleeved on the air duct, the outer end of the wedge ring assembly is wedged in the adjacent air duct, and connecting blocks are provided on the outermost air duct and the equipment pipeline, the cross-section of the connecting block is a right-angled trapezoid, and the two connecting blocks are connected by a V-shaped clamp.

[0005] Furthermore, the wedge ring assembly includes a retaining ring, on which a plurality of receiving blocks are evenly distributed along the circumferential direction, and the outer ends of the receiving blocks are conical surfaces.

[0006] Furthermore, an inner conical surface matching the conical surface is provided on the inner wall of the air duct, a shoulder end groove is provided on the outer wall of the air duct, the retaining ring is sleeved on the shoulder end groove, and the conical surface of the receiving block is wedged onto the inner conical surface.

[0007] Furthermore, a protrusion is provided on the clamping surface of the V-shaped clamp, a groove matching the protrusion is provided on the surface of the connecting block, the clamping surface of the V-shaped clamp fits with the outer surface of the V-shaped clamp, and the protrusion is located in the groove.

[0008] Furthermore, a sealing ring is provided between the air duct and the equipment pipeline.

[0009] Furthermore, the sealing ring is made of fluororubber.

[0010] The beneficial effects of the utility model: the V-shaped wedge-tight connection method designed by the utility model replaces the traditional welding and screw connection methods, making the replacement of the end head of the multi-duct burner faster and more convenient without destructive disassembly. At the same time, the multiple air ducts at the end head are connected by a wedge ring assembly, so the air ducts can be replaced individually, and there is no need to replace all the air ducts at the end head due to damage to the external air ducts. This saves resources, reduces costs, and is worthy of large-scale promotion and use. Description of the drawings:

[0011] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0012] Figure 2 This is a cross-sectional view of the utility model;

[0013] Figure 3 It is a three-dimensional diagram of the wedge ring assembly of the utility model;

[0014] Figure 4 for Figure 2 A schematic diagram of the enlarged structure of part A;

[0015] Figure 5 for Figure 3 A schematic diagram of the enlarged structure of part B;

[0016] In the figure, there are air duct 1, connecting block 2, retaining ring 3, V-shaped clamp 4, inner cone 5, shaft shoulder end groove 6, receiving block 7, protrusion 8, sealing ring 9, and equipment pipeline 10. Specific implementation method:

[0017] like Figure 1 and Figure 2 As shown, an improved multi-duct pulverized coal burner device includes an equipment pipeline 10 and a plurality of coaxially arranged air ducts 1, any two adjacent air ducts 1 are connected by a wedge ring assembly, the inner hole of the wedge ring assembly is sleeved on the air duct 1, and the outer end of the wedge ring assembly is wedged in the adjacent air duct 1, and connecting blocks 2 are provided on the outermost air duct 1 and the equipment pipeline 10, the cross-section of the connecting block 2 is a right-angled trapezoid, and the two connecting blocks 2 are connected by a V-shaped clamp 4.

[0018] like Figure 3 As shown, the wedge ring assembly includes a retaining ring 3, on which a plurality of receiving blocks 7 are evenly distributed along the circumferential direction, and the outer ends of the receiving blocks 7 are conical surfaces.

[0019] like Figure 4 As shown, an inner conical surface 5 matching the conical surface is provided on the inner wall of the air duct 1, a shoulder end groove 6 is provided on the outer wall of the air duct 1, the retaining ring 3 is sleeved on the shoulder end groove 6, and the conical surface of the receiving block 7 is wedged on the inner conical surface 5.

[0020] like Figure 5 As shown, in order to improve the stability of the connection, a protrusion 8 is provided on the clamping surface of the V-shaped clamp 4, and a groove matching the protrusion 8 is opened on the surface of the connecting block 2. The clamping surface of the V-shaped clamp 4 is in contact with the outer surface of the V-shaped clamp 4, and the protrusion 8 is located in the groove. In order to improve the sealing of the burner, a sealing ring 9 is provided between the air duct 1 and the equipment pipe 10, and the sealing ring 9 is made of fluororubber, which has good high temperature resistance.

[0021] like Figures 1 to 5 As shown, during installation, the utility model only needs to sequentially fit each air duct 1 and each wedge ring assembly from the inside to the outside, so that the retaining ring 3 of the wedge ring assembly is pressed against the shaft shoulder end groove 6, and the conical surface of the receiving block 7 is wedged on the inner conical surface 5 of the air duct 1, and finally the V-shaped clamp 4 is installed, and the V-shaped clamp 4 is chiseled so that the clamping surface of the V-shaped clamp 4 is tightly fitted to the trapezoidal surface of the connecting block 2, and the protrusion 8 enters the groove to complete the radial limit, that is, the installation is completed, and the sealing ring 9 is compressed and sealed.

[0022] like Figures 1 to 5 As shown, when the utility model needs to be disassembled, the V-clip 4 can be removed by only chiseling the side of the V-clip 4 horizontally (i.e., in the direction perpendicular to the axis of the air duct 1). Since the V-clip 4 has no fine mechanical structures such as threads, it is less affected by high-temperature deformation, so it is easy to disassemble and assemble. At the same time, when disassembling each air duct 1, a reverse force can be applied to the adjacent air ducts 1, so that the disassembly and replacement of a single air duct 1 can be achieved.

[0023] The above are only preferred examples 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. An improved multi-duct pulverized coal burner device, characterized in that: It comprises an equipment pipeline (10) and a plurality of coaxially arranged air ducts (1), any two adjacent air ducts (1) are connected via a wedge ring assembly, the inner hole of the wedge ring assembly is sleeved on the air duct (1), the outer end of the wedge ring assembly is wedged in the adjacent air duct (1), and a connecting block (2) is arranged on the outermost air duct (1) and the equipment pipeline (10), the cross section of the connecting block (2) is a right-angled trapezoid, and the two connecting blocks (2) are connected via a V-shaped clamp (4).

2. An improved multi-channel pulverized coal burner device according to claim 1, characterized in that: The wedge ring assembly comprises a retaining ring (3), on which a plurality of receiving blocks (7) are evenly distributed along the circumferential direction, and the outer ends of the receiving blocks (7) are conical surfaces.

3. An improved multi-channel pulverized coal burner device according to claim 2, characterized in that: An inner conical surface (5) matching the conical surface is arranged on the inner wall of the air duct (1), a shaft shoulder end groove (6) is arranged on the outer wall of the air duct (1), the retaining ring (3) is sleeved on the shaft shoulder end groove (6), and the conical surface of the receiving block (7) is wedged on the inner conical surface (5).

4. An improved multi-channel pulverized coal burner device according to claim 1, characterized in that: A protrusion (8) is provided on the clamping surface of the V-shaped clamp (4), and a groove matching the protrusion (8) is provided on the surface of the connecting block (2); the clamping surface of the V-shaped clamp (4) is in contact with the outer surface of the V-shaped clamp (4), and the protrusion (8) is located in the groove.

5. An improved multi-channel pulverized coal burner device according to any one of claims 1 to 4, characterized in that: A sealing ring (9) is provided between the air duct (1) and the equipment pipeline (10).

6. An improved multi-channel pulverized coal burner device according to claim 5, characterized in that: The sealing ring (9) is made of fluororubber.

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