Large-diameter spiral welded pipe industrial smoke dust collecting device and working method

Abstract

The invention discloses a large-diameter spiral welded pipe industrial smoke dust collecting device and a working method. The large-diameter spiral welded pipe industrial smoke dust collecting device comprises a spiral steel pipe, a cross beam and a central disc, the cross beam is arranged in the spiral welded pipe, one end of the cross beam is installed on a forming beam of a spiral welded pipe unit, the center disc is installed at the other end of the cross beam, and the center disc is located at the center of a spiral welded pipe circle. A plurality of outer ring discs are mounted on the central disc in an overlapping manner and are used for sealing pipelines of spiral steel pipes with different diameter sizes; an upper air suction hose and a lower air suction hose are arranged on the central disc, one end of the upper air suction hose and one end of the lower air suction hose are connected with an air suction opening of the central disc, the other end of the upper air suction hose and the other end of the lower air suction hose are connected with dust removal air suction equipment, and the dust removal air suction equipment is fixedly installed on the cross beam. The problem of insufficient collection of industrial smoke dust during cutting of different models and different fixed lengths in the spiral steel pipe production process is solved, and the situation that the smoke dust overflows from the two ends of a pipeline is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of soot collection devices, and particularly relates to a large-diameter spiral welded pipe industrial soot collection device and a working method thereof. Background Art

[0002] The statements in this part only provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] The large-diameter spiral welded pipe production unit belongs to continuous production without interruption. During the production process, cutting to a fixed length is required, and plasma cutting is used for cutting. When cutting, a large amount of cutting industrial soot overflows from both sides of the pipe orifice and the cutting position of the spiral welded pipe, causing serious environmental pollution and having a certain impact on human health. Therefore, an industrial soot collection device needs to be installed at the pollution source.

[0004] The existing soot suction device uses a single iron collecting hood fixed to the support frame with a steel wire rope and hoisted 300 - 500 mm above the pipe orifice and the cutting position of the spiral welded pipe. It is controlled by a motor to lift the collecting hood, and the height of the collecting hood is controlled according to the diameter of the spiral welded pipe. If there are different fixed lengths, it is necessary to install or move the collecting hood to collect industrial soot. The spiral welded pipe forming unit can generally produce different fixed lengths from 6 to 18 m in the market. However, the diameter models and lengths of the spiral welded pipes change frequently, and the fixed length cannot be fixed, resulting in the problem that the traditional method of setting the collecting hood cannot collect all the soot. When plasma cutting is carried out, accompanied by compressed air, the soot will disperse irregularly with the compressed air flow, and the air flow of the collecting hood is much lower than that of the compressed air, resulting in a low collection rate of the collecting hood. Summary of the Invention

[0005] Aiming at the above problems, the present invention provides a large-diameter spiral welded pipe industrial soot collection device and a working method thereof, which solve the problem of insufficient collection of industrial soot during the cutting of spiral steel pipes with different models and different fixed lengths, avoid the situation of soot overflowing from both ends of the pipeline, and solve the high equipment cost caused by the number of collecting hoods and the length of the air suction pipeline required for different fixed lengths.

[0006] To achieve the above object, the present invention is realized by the following technical solutions:

[0007] In a first aspect, the present invention provides an industrial soot collection device for large-diameter spiral welded pipes, comprising a spiral steel pipe, a cross beam, and a central disc; the cross beam is arranged inside the spiral welded pipe, one end of the cross beam is installed on the forming beam of the spiral welded pipe unit, and the other end is installed with the central disc, and the central disc is located at the center position of the spiral welded pipe circle; a plurality of outer discs are superimposed and installed on the central disc for closing the pipes of spiral steel pipes with different diameter sizes; an upper suction hose and a lower suction hose are provided on the central disc, one end of the upper suction hose and the lower suction hose is connected to the suction port of the central disc, and the other end is connected to a dust removal suction device, and the dust removal suction device is fixedly installed on the cross beam.

[0008] As a further implementation manner, the outer diameters of the plurality of outer discs are different, and the plurality of outer discs are superimposed and installed on the central disc in sequence according to the size of the outer diameter. The number of the outer discs provided is determined according to the diameter of the spiral steel pipe. The distance between the outer diameter of the central disc and the inner wall of the spiral steel pipe is less than a set distance; the distance between the edge of the outer disc and the inner wall of the spiral steel pipe is less than 60 mm;

[0009] A plurality of support frames are uniformly arranged along the radial direction on the plurality of outer discs. One end of the support frame is fixedly connected to the central disc, and each outer disc is fixedly connected to the support frame through a connecting member.

[0010] As a further implementation manner, a set distance is provided between the cross beam and the inner wall of the spiral steel pipe to avoid affecting the operation of the cutting machine and ensure the cutting speed during the cutting of the spiral steel pipe.

[0011] As a further implementation manner, a set distance is provided between the cross beam and the welding gun head on the spiral welded pipe unit to avoid affecting the adjustment range of the welding gun head.

[0012] As a further implementation manner, the upper suction hose and the lower suction hose are both on the same horizontal line as the cutting point, so that the suction port of the suction hose and the cutting point are always at a fixed distance, which is used to ensure the collection efficiency of the soot collection device.

[0013] As a further implementation manner, a switch window is provided on the central disc for use when adjusting and replacing the welding gun head.

[0014] As a further implementation manner, the upper suction hose and the lower suction hose are connected to the dust removal suction device through a branch joint.

[0015] As a further implementation manner, the upper suction hose is arranged in a Z shape to ensure that one end of the upper suction hose is connected to the center of the central disc and the other end is connected to the branch joint.

[0016] As a further implementation manner, the lower suction hose is a straight pipe, one end of which is connected to the edge position of the central disc, and the other end is connected to the branch joint.

[0017] In a second aspect, the present invention also provides a working method for an industrial soot collection device for large-diameter spiral welded pipes, including the following steps:

[0018] S1. According to the diameter of the spiral steel pipe to be produced, select the corresponding number of outer ring discs to be stacked on the central disc, and fix them through the support frame and the connecting piece to ensure that the distance between the outer diameter of the combined disc and the inner wall of the pipe meets the requirements; fix the cross beam on the forming beam of the spiral welded pipe unit, make the central disc located at the center of the pipe circle, and adjust the positions of the upper and lower suction hoses to ensure that the suction ports are aligned with the horizontal line of the cutting point;

[0019] S2. When the welding or cutting operation is started, the dust collection and suction equipment is turned on synchronously. The upper and lower suction hoses form a stable negative pressure field around the cutting point. The soot enters the dust collection equipment through the suction ports and hoses along with the air flow, and is filtered and purified; the distance design between the above-mentioned cross beam and the equipment ensures the normal operation of the cutting machine and the welding torch head, and the switch window remains closed to maintain the pipe seal;

[0020] S3. When changing the steel pipe specification, only disassemble or install the outer ring discs, and the diameter adaptation can be completed by adjusting the connecting piece of the support frame, significantly improving the line change efficiency of the production line.

[0021] Compared with the prior art, the advantages and positive effects of the present invention are:

[0022] When the present invention produces spiral welded pipes, it is not necessary to consider the fixed length of the spiral welded pipes, and it is not necessary to consider the overflow of industrial soot on any side of the spiral welded pipes. All the soot is recovered inside the spiral welded pipes. The process of installing gas collection hoods at both ends and the cutting positions of spiral welded pipes with different models and different lengths is cancelled. By setting the stackable outer ring discs, the area of the collection device can be quickly adjusted according to the diameter of the spiral steel pipe, effectively solving the problem that gas collection hoods need to be frequently installed or moved for spiral welded pipes with different diameters and fixed lengths, significantly improving the working efficiency and production capacity, and greatly shortening the line change time of the production line; in addition, since the outer diameter size of the outer ring discs can be flexibly increased, the number of gas collection hoods required for different fixed lengths and the length of the suction pipes are reduced, thereby greatly reducing the equipment investment cost and improving the economic benefits.

[0023] The outer ring disc of the present invention forms a radial support structure with the central disc through a support frame, ensuring concentricity and stability in a high-speed rotating production environment; there is sufficient spacing between the cross beam and the inner wall of the spiral steel pipe and the welding gun head, which neither affects the operation of the cutting machine and the angle adjustment of the welding gun head, nor can the dust collection and production operation be carried out synchronously; a switch window is provided on the central disc, and there is no need to disassemble the entire collection device when replacing the welding gun head or repairing internal components, shortening the maintenance time by more than 50%, and reducing the maintenance difficulty and time cost.

[0024] The upper and lower suction hoses of the present invention are on the same horizontal line as the cutting point, and a symmetrical negative pressure area is formed around the cutting point. The upper suction lifts the rising dust, and the lower suction settles the dust, effectively ensuring the dust collection efficiency, avoiding the problem of suction attenuation caused by distance changes in the traditional collection device, and effectively avoiding the situation of industrial dust overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings forming a part of this specification are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0026] Figure 1 It is a schematic diagram of the overall structure of the cutting table amplitude modulation device of the present invention.

[0027] In the figure: 1, spiral steel pipe; 2, upper suction hose; 3, cross beam; 4, lower suction hose; 5, switch window; 6, central disc; 7, outer ring disc; 8, dust removal suction device. DETAILED DESCRIPTION OF THE INVENTION

[0028] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the present invention clearly states otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof;

[0030] In the prior art, the diameter models and lengths of spiral welded pipes often change, and the fixed length cannot be fixed, resulting in the problem that the traditional method of setting the gas hood cannot collect all the dust. During plasma cutting, accompanied by compressed air, the dust will escape randomly with the compressed air flow. The air flow of the gas hood is much lower than that of the compressed air, resulting in a low collection rate of the gas hood. To solve the above problems, the technical solutions of the present invention will be elaborated below according to the following content and in combination with the accompanying drawings of the specification.

[0031] Embodiment 1

[0032] This embodiment provides an industrial dust collection device for large-diameter spiral welded pipes, as Figure 1 shown, including a spiral steel pipe 1, a cross beam 3 and a central disc 6; the cross beam 3 is arranged inside the spiral welded pipe, and there is a certain distance between the cross beam 3 and the cutting point and the welding gun head. The arrangement of the cross beam 3 is set according to factors such as the cutting position of the spiral welded pipe and the distance of the spiral welded pipe unit, so as to avoid affecting the cutting speed of the spiral welded pipe and the adjustment of the welding gun head of the spiral welded pipe. One end of the cross beam 3 is installed on the forming beam of the spiral welded pipe unit, and the other end is installed with the central disc 6, and the central disc 6 is located at the center position of the spiral welded pipe circle. After the central disc 6 is positioned and installed once, it can be used permanently without secondary adjustment, and the device has convenient installation and operation; a plurality of outer ring discs 7 are superimposed and installed on the central disc 6 for closing the pipes of spiral steel pipes 1 with different diameter sizes; an upper suction hose 2 and a lower suction hose 4 are provided on the central disc 6. One end of the upper suction hose 2 and the lower suction hose 4 is connected to the suction port of the central disc 6, and the other end is connected to a dust removal suction device 8, and the dust removal suction device 8 is fixedly installed on the cross beam 3. The industrial dust collection device for large-diameter spiral welded pipes of the present invention can increase the area of the collection device by using the outer ring discs 7 when the diameters and fixed lengths of different spiral welded pipes are different, canceling the process of installing or moving the gas hood for different spiral welded pipe diameters and different fixed lengths, greatly improving the work efficiency and the production capacity of spiral welded pipes. Since the outer diameter size of the outer ring disc 7 can be increased, the collection area is increased, canceling the number of gas hoods for different fixed lengths and the length of the suction pipes, greatly reducing the equipment investment cost.

[0033] As a further implementation method, the outer diameter sizes of the plurality of outer ring discs 7 are different, and the plurality of outer ring discs 7 are superimposed and installed on the central disc 6 in sequence according to the size of the outer diameter. The number of the outer ring discs 7 provided is determined according to the diameter of the spiral steel pipe 1. The difference between the outer diameter of the central disc 6 and the inner wall of the spiral steel pipe 1 is less than a set distance; the distance between the edge of the outer ring disc 7 and the inner wall of the spiral steel pipe 1 is less than 60 mm, forming a closed structure inside the pipe to prevent the dust from spreading to both ends of the pipe;

[0034] A plurality of support frames are uniformly arranged along the radial direction on the outer ring disks 7. One end of each support frame is fixedly connected to the central disk 6, and each outer ring disk 7 is fixedly connected to the support frame through a connecting member. One end of the support frame is fixedly connected to the central disk 6, and the other end is connected to the outer ring disk 7 through a connecting member (such as a bolt or a buckle), forming a radial support structure to ensure that the disk combinations with different diameters are concentric and stable in the pipeline, and adapting to the production environment of the high-speed rotating spiral steel pipe 1.

[0035] As a further implementation method, a set distance is provided between the cross beam 3 and the inner wall of the spiral steel pipe 1 to avoid affecting the operation of the cutting machine and ensure the cutting speed during the cutting of the spiral steel pipe 1; a set distance is provided between the cross beam 3 and the welding gun head on the spiral welded pipe unit to avoid affecting the adjustment range of the welding gun head. The set distance with no interference between the cross beam 3 and the inner wall of the spiral steel pipe 1 and the welding gun head is greater than 100 mm. The former avoids interfering with the lateral movement and high-speed cutting operation of the cutting machine, and the latter ensures that the welding gun head can freely adjust the angle within the range of ±30°, without affecting the precise control of the welding process parameters, and realizes the synchronous progress of dust collection and production operation.

[0036] As a further implementation method, both the upper suction hose 2 and the lower suction hose 4 are on the same horizontal line as the cutting point, so that the suction port of the suction hose is always at a fixed distance from the cutting point, which is used to ensure the collection efficiency of the dust collection device. After the dust removal equipment is started, a symmetrical negative pressure area is formed around the cutting point through the upper and lower suction hoses 4. The upper suction covers the rising dust generated by welding or cutting, and the lower suction captures the settling dust, ensuring that the dust in the three-dimensional space is efficiently sucked in.

[0037] As a further implementation method, a switch window 5 is provided on the central disk 6, which is used for adjustment and replacement when the welding gun head is replaced. Specifically, when the welding gun head needs to be replaced or the internal components need to be repaired, the switch window 5 can be opened, and there is no need to disassemble the entire collection device, and the maintenance time is shortened by more than 50%.

[0038] As a further implementation method, the upper suction hose 2 and the lower suction hose 4 are connected to the dust collection suction device 8 through a branch joint.

[0039] As a further implementation method, the upper suction hose 2 is arranged in a Z shape to ensure that one end of the upper suction hose 2 is connected to the center of the center disc 6, and the other end is connected to the branch joint; the lower suction hose 4 is a straight pipe, one end of which is connected to the edge position of the center disc 6, and the other end is connected to the branch joint, so that symmetrical negative pressure areas are formed around the cutting point by the upper and lower suction hoses 4, and the airflow paths formed by the upper and lower suction are directly aligned with the pollution source, avoiding the problem of suction attenuation caused by distance changes in traditional collection devices, and enabling the soot to be sucked into the hose instantly when it is generated.

[0040] Embodiment 2

[0041] This embodiment provides a working method for a large-diameter spiral welded pipe industrial soot collection device, including the following steps:

[0042] S1. According to the diameter of the spiral steel pipe 1 to be produced, select the corresponding number of outer discs 7 and stack them on the center disc 6, and fix them through the support frame and the connecting piece to ensure that the distance between the outer diameter of the combined disc and the inner wall of the pipe meets the requirements; fix the cross beam 3 on the forming beam of the spiral welded pipe unit, so that the center disc 6 is located at the center of the pipe, and adjust the position of the upper and lower suction hoses 4 to ensure that the suction ports are aligned with the horizontal line of the cutting point;

[0043] S2. When the welding or cutting operation is started, the dust suction device 8 is started synchronously, and stable negative pressure fields are formed around the cutting point by the upper and lower suction hoses 4. The soot enters the dust removal device through the suction ports and hoses along with the airflow to complete filtration and purification; the distance design between the above cross beam 3 and the device ensures the normal operation of the cutting machine and the welding torch head, and the switch window 5 remains closed to maintain the pipe tightness;

[0044] S3. When changing the steel pipe specification, only remove or add the outer discs 7, and the diameter adaptation can be completed by adjusting the support frame connecting piece, significantly improving the line change efficiency of the production line.

[0045] Although the specific implementation manners of the present invention are described above in conjunction with the drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made without creative labor by those skilled in the art are still within the protection scope of the present invention.

Claims

1. An industrial soot collection device for large-diameter spiral welded pipes, characterized in that, It includes a spiral steel pipe, a cross beam and a central disc; the cross beam is arranged inside the spiral welded pipe, one end of the cross beam is installed on the forming beam of the spiral welded pipe unit, the other end is installed with the central disc, and the central disc is located at the center position of the spiral welded pipe circle; a plurality of outer ring discs are superimposed and installed on the central disc for closing the pipelines of spiral steel pipes with different diameter sizes; an upper suction hose and a lower suction hose are arranged on the central disc, one ends of the upper suction hose and the lower suction hose are connected to the suction ports of the central disc, and the other ends are connected to a dust removal suction device, and the dust removal suction device is fixedly installed on the cross beam.

2. The industrial soot collection device for large-diameter spiral welded pipes according to claim 1, characterized in that, The outer diameters of the plurality of outer ring discs are different, and the plurality of outer ring discs are superimposed and installed on the central disc in sequence according to the size of the outer diameter. The number of the outer ring discs arranged is determined according to the diameter of the spiral steel pipe. The distance between the outer diameter of the central disc and the inner wall of the spiral steel pipe is less than a set distance; the distance between the edge of the outer ring disc and the inner wall of the spiral steel pipe is less than 60 mm; A plurality of support frames are uniformly arranged along the radial direction on the plurality of outer ring discs. One end of each support frame is fixedly connected to the central disc, and each outer ring disc is fixedly connected to the support frame through a connecting piece.

3. The industrial soot collection device for large-diameter spiral welded pipes according to claim 2, characterized in that A set distance is provided between the cross beam and the inner wall of the spiral steel pipe to avoid affecting the work of the cutting machine and ensure the cutting speed when cutting the spiral steel pipe.

4. The industrial soot collection device for large-diameter spiral welded pipes according to claim 2, characterized in that, A set distance is provided between the cross beam and the welding gun head on the spiral welded pipe unit to avoid affecting the adjustment range of the welding gun head.

5. The industrial soot collection device for large-diameter spiral welded pipes according to claim 1, characterized in that, The upper suction hose and the lower suction hose are both on the same horizontal line as the cutting point, so that the suction port of the suction hose and the cutting point are always at a fixed distance, which is used to ensure the collection efficiency of the dust collection device.

6. The industrial soot collection device for large-diameter spiral welded pipes according to claim 5, wherein, A switch window is arranged on the central disc for use when adjusting and replacing the welding gun head.

7. The industrial soot collection device for large-diameter spiral welded pipes according to claim 6, characterized in that, The upper suction hose and the lower suction hose are connected to the dust removal suction device through a branch joint.

8. The industrial soot collection device for large-diameter spiral welded pipes according to claim 7, characterized in that, The upper suction hose is arranged in a Z shape to ensure that one end of the upper suction hose is connected to the center of the central disc and the other end is connected to the branch joint.

9. The industrial soot collection device for large-diameter spiral welded pipes according to claim 8, characterized in that The lower suction hose is a straight pipe, one end of which is connected to the edge position of the central disc and the other end is connected to the branch joint.

10. The working method of a large-diameter spiral welded pipe industrial soot collection device according to any one of claims 1-9, characterized in that, It includes the following steps: S1. According to the diameter of the spiral steel pipe to be produced, select the corresponding number of outer ring discs to be superimposed on the central disc, and fix them through the support frame and the connecting piece to ensure that the outer diameter of the combined disc meets the requirements of the inner wall spacing of the pipeline; fix the cross beam on the forming beam of the spiral welded pipe unit, make the central disc located at the center of the pipeline, and adjust the positions of the upper and lower suction hoses to ensure that the suction ports are aligned with the horizontal line of the cutting point; S2. When the welding or cutting operation is started, the dust removal suction device is started synchronously. The upper and lower suction hoses form a stable negative pressure field around the cutting point. The dust and smoke enter the dust removal device through the suction ports and hoses along with the air flow, and are filtered and purified; the spacing design between the cross beam and the equipment ensures the normal operation of the cutting machine and the welding gun head, and the switch window remains closed to maintain the pipeline tightness; S3. When changing the steel pipe specification, only disassemble or install the outer disc, and the diameter adaptation can be completed by adjusting the support frame connecting piece, significantly improving the production line changeover efficiency.

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