Method for cleaning fan inlet side ducts

Abstract

This invention provides a method for cleaning the air inlet side duct of a fan, comprising the following steps: welding multiple pipe sections to be welded from the air outlet to the air inlet of the fan; using an elastic hammer to evenly tap the outer wall of the weld joint of the air inlet side duct to remove the weld slag; cleaning the weld slag inside the air inlet side duct to obtain a roughly cleaned fan duct; and using an adhesive material to thoroughly cover and adhere the interior of the roughly cleaned fan duct until the interior of the roughly cleaned fan duct meets preset requirements. This invention addresses the problems of existing methods for cleaning the air inlet side duct of fans, which risk causing internal cracks in the weld and heat-affected zone, and the potential health hazards to cleaning personnel when using a blowing method for fine cleaning, as metal powder can easily enter their bodies.

Description

Technical Field

[0001] This invention relates to the field of pipeline construction technology, and more specifically, to a method for cleaning the intake side pipeline of a fan. Background Technology

[0002] Currently, there is an increasing number of technological upgrades and renovations in metallurgical, power, and chemical projects. In particular, the installation, maintenance, and cleaning of process pipelines on the air inlet side (the side where the gas medium enters the precision equipment) of blower stations and air compressor stations are unavoidable challenges. Ensuring both the progress of process pipeline construction and welding, as well as quality and safety during construction, is a key focus for all involved in the project and a concentrated reflection of a construction company's core technical capabilities. Especially in large steel plant blower stations, where construction is required on the air inlet side of the axial flow compressor, ensuring welding precision and quality while maintaining the construction progress and post-installation cleanliness is a crucial technical challenge that cannot afford any mistakes.

[0003] Currently, the cleaning method for the inlet pipes of welded fans generally involves the following steps: first, the weld joint is tapped with a hammer or other blunt object, then roughly cleaned manually, and finally, a small air compressor is used by a person to blow it clean. This method has several drawbacks, including the risk of the blunt object causing internal cracks in the weld and heat-affected zone, personnel crossing into the pipe, difficulty in systematically and orderly cleaning the pipe, high cost, long cycle, and the risk of metal powder entering the body during blowing, which can be harmful to cleaning personnel.

[0004] In summary, current methods for cleaning the inlet ducts of wind turbines have several drawbacks, including the risk of causing internal cracks in the welds and heat-affected zones, the difficulty of systematically and orderly cleaning the ducts when personnel cross into them, and the potential for metal powder to enter the personnel's bodies during fine cleaning by blowing, posing a health hazard. Summary of the Invention

[0005] In view of the above problems, the purpose of this invention is to provide a method for cleaning the intake side pipe of a fan, so as to solve the problems of the existing cleaning methods for the intake side pipe of a fan, which are prone to causing internal crack damage to the weld and heat-affected zone, personnel crossing into the pipe, making it difficult to systematically and orderly clean the pipe, and when using the blowing method for fine cleaning, metal powder can easily enter the body of the cleaning personnel, thus posing a certain hazard to the health of the cleaning personnel.

[0006] This invention provides a method for cleaning the intake side pipe of a fan, comprising the following steps:

[0007] Multiple pipe sections to be welded are welded from the air outlet to the air inlet of the fan to obtain the fan inlet side pipe composed of multiple pipe sections welded together.

[0008] An elastic hammer is used to evenly tap the outer wall of the weld joint of the air inlet pipe of the fan, so that the weld slag at the weld joint is removed.

[0009] The welding slag inside the air intake side pipe of the fan is cleaned to remove any visible particles or powder, resulting in a roughly cleaned fan pipe.

[0010] Adhesive material is used to thoroughly cover and clean the inside of the fan duct after coarse cleaning until the inside of the fan duct meets the preset requirements, thus completing the cleaning of the fan intake side duct.

[0011] Furthermore, a preferred embodiment includes, before welding the pipe section to be welded from the air outlet to the air inlet of the fan to obtain the fan inlet side pipe composed of multiple pipe sections, the following steps are also included:

[0012] According to the preset pipe connection drawings, the pipe material is cut to obtain the cut pipe material;

[0013] The weld joint of the cut pipe is mechanically ground to create a V-shaped bevel, resulting in the pipe section to be welded.

[0014] In addition, a preferred embodiment is that, during the process of cutting the pipe material according to the preset pipe connection drawings to obtain the cut pipe, an oxyacetylene flame is used to cut the pipe.

[0015] In addition, a preferred embodiment is that, during the process of welding the pipe section to be welded from the air outlet to the air inlet of the fan to obtain the fan inlet side pipe composed of multiple pipe sections, the pipe section to be welded is welded using an argon arc welding method.

[0016] Furthermore, a preferred embodiment is that the elastic hammer is a rubber hammer or a wooden mallet.

[0017] Furthermore, in a preferred embodiment, the fan inlet side duct includes a horizontal pipe, a 90-degree elbow, and a vertical pipe; wherein, the inlet end of the horizontal pipe is connected to the outlet of the air filter; the lower connecting end of the 90-degree elbow is connected to the outlet end of the horizontal pipe; the lower port of the vertical pipe is connected to the upper connecting end of the 90-degree elbow, and the upper port of the vertical pipe is connected to the fan inlet.

[0018] Furthermore, in a preferred embodiment, the air filter room includes an air filter chamber, an air inlet duct disposed at the top of the air filter chamber, and an air filter disposed inside the air filter chamber; the air outlet of the air filter room is disposed on the side wall of the air filter chamber; and the air filter is located between the air inlet duct and the air outlet of the air filter room.

[0019] Furthermore, a preferred embodiment involves using clumps of adhesive material to thoroughly cover and clean the interior of the pre-cleaned fan duct until the interior of the pre-cleaned fan duct meets preset requirements, thus completing the cleaning of the fan intake side duct.

[0020] The interior of the fan duct after the initial coarse cleaning is divided into cleaning zones;

[0021] The pipe sidewalls in the cleaning area are cleaned sequentially using clumps of adhesive material, following a top-to-bottom order.

[0022] The cleaned area after adhesion removal is tested for compliance. When the cleaned area after adhesion removal passes the test, it is marked as a qualified area.

[0023] The cleaning of the fan intake side duct is complete when all cleaned areas are marked as qualified areas.

[0024] Furthermore, a preferred embodiment is that during the process of sequentially applying adhesive material clumps to the pipe sidewalls of the cleaning area in a top-to-bottom order for cleaning,

[0025] Cleaning personnel enter the cleaning area through the manhole located on the air inlet side duct of the fan, and perform adhesive cleaning on the inner wall of the cleaning area in order from farthest to near the manhole.

[0026] Furthermore, a preferred embodiment is that the viscous material is dough.

[0027] As can be seen from the above technical solution, the method for cleaning the air intake side pipe of the fan provided by the present invention uses an elastic hammer to evenly tap the outer wall of the weld joint of the air intake side pipe of the fan, so that the weld slag at the weld joint is removed. This achieves the goal of thoroughly removing the weld slag at the weld joint while avoiding internal crack damage to the weld and heat-affected zone. By using a sticky material to comprehensively cover and adhere to the interior of the fan pipe after coarse cleaning, the inner wall of the pipe can be evenly and systematically adhered without dead corners, avoiding the impact of metal dust on human health. The present invention has the advantages of simple method, safety and reliability, saving construction time, and green and environmentally friendly materials.

[0028] To achieve the foregoing and related objectives, one or more aspects of the invention include the features that will be described in detail below. The following description and accompanying drawings illustrate certain exemplary aspects of the invention. However, these aspects indicate only a few of the various ways in which the principles of the invention can be used. Furthermore, the invention is intended to encompass all such aspects and their equivalents. Attached Figure Description

[0029] Other objects and results of the invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings. In the drawings:

[0030] Figure 1 This is a flowchart of a method for cleaning the air intake side pipe of a fan according to an embodiment of the present invention;

[0031] Figure 2 This is a structural diagram of the on-site layout of the fan inlet side pipeline according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure at the weld joint of multiple pipe sections to be welded according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the fan inlet side pipe according to an embodiment of the present invention.

[0034] In the attached diagram, 1-fan, 2-fan inlet side pipe, 21-welded joint, 22-horizontal pipe, 23-90-degree elbow, 24-vertical pipe, 25-manhole, 3-air filter room, 31-air filter chamber, 32-air inlet duct, 33-air filter.

[0035] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0036] In the following description, numerous specific details are set forth for illustrative purposes and to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may also be implemented without these specific details.

[0037] In view of the aforementioned problems in the existing technology for cleaning the air inlet side pipes of fans, such as the risk of internal crack damage to the weld and heat-affected zone, the difficulty of systematically and orderly cleaning the pipes when personnel cross into the pipes, and the risk of metal powder entering the body of the cleaning personnel when using the purging method for fine cleaning, which poses a certain hazard to the health of the cleaning personnel, a new method for cleaning the air inlet side pipes of fans is proposed.

[0038] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0039] To illustrate the method for cleaning the air intake side pipe of a fan provided by the present invention Figure 1 The flowchart of a method for cleaning the intake side pipe of a fan according to an embodiment of the present invention is shown; Figure 2 The on-site layout structure of the fan inlet side pipeline according to an embodiment of the present invention is shown; Figure 3 The structure at the weld joint of multiple pipe sections to be welded according to an embodiment of the present invention is shown; Figure 4 The structure of the fan inlet side duct according to an embodiment of the present invention is shown.

[0040] like Figures 1 to 4 As shown in the figure, the method for cleaning the air intake side pipe of the fan provided by the present invention includes the following steps:

[0041] S1. Weld multiple pipe sections from the air outlet to the air inlet of the fan 1 to obtain the fan inlet side pipe 2, which is made of multiple pipe sections welded together.

[0042] S2. Use an elastic hammer to evenly tap the outer wall of the weld joint 21 of the air inlet pipe 2 of the fan, so that the weld slag at the weld joint will fall off.

[0043] S3. Clean the welding slag inside the fan inlet side pipe 2 to ensure that there are no visible particles or powder inside the fan inlet side pipe 2, and obtain a roughly cleaned fan pipe.

[0044] S4. Use adhesive material to thoroughly cover and clean the inside of the fan duct after coarse cleaning until the inside of the fan duct meets the preset requirements, thus completing the cleaning of the fan intake side duct.

[0045] By using an elastic hammer to evenly tap the outer wall of the weld joint 21 of the air intake side pipe 2 of the fan, the weld slag at the weld joint is removed. This not only effectively removes the weld slag at the weld joint but also avoids internal crack damage to the weld and heat-affected zone. By using adhesive material to thoroughly cover and clean the inside of the fan pipe after coarse cleaning, the inner wall of the pipe can be evenly and systematically adhered without dead corners, avoiding the impact of metal dust on human health. This invention has the advantages of simple method, safety and reliability, time saving, and green and environmentally friendly materials.

[0046] As a preferred embodiment of the present invention, before welding the pipe section to be welded from the air outlet to the air inlet of the fan 1 to obtain the fan inlet side pipe 2 composed of multiple pipe sections, the method further includes:

[0047] According to the preset pipe connection drawings, the pipe material is cut to obtain the cut pipe material;

[0048] The weld joint of the cut pipe is mechanically ground to create a V-shaped bevel, resulting in the pipe section to be welded.

[0049] The pre-designed drawings indicate the amount of pipe material to be used and the cutting plan for the pipe material. Therefore, the pipe material can be cut according to the pre-designed pipe connection drawings to obtain multiple sections of cut pipe material. In order to facilitate the subsequent welding of the cut pipe material, the weld joint of the cut pipe material is mechanically ground to open a V-shaped bevel.

[0050] In a preferred embodiment of the present invention, during the process of cutting the pipe material according to the preset pipe connection drawings to obtain the cut pipe, an oxyacetylene flame is used to cut the pipe. Oxyacetylene flame cutting has good cutting effect and less spatter.

[0051] In a preferred embodiment of the present invention, during the process of welding the pipe section to be welded from the air outlet to the air inlet of the fan to obtain the fan inlet side pipe composed of multiple pipe sections, argon arc welding is used to weld the pipe section to be welded. In order to ensure the welding quality and cleanliness in advance for the next cleaning process, argon arc welding with less spatter, better forming, and high efficiency of non-destructive testing is adopted.

[0052] As a preferred embodiment of the present invention, the elastic hammer is a rubber hammer or a wooden mallet. A rubber hammer or wooden mallet provides a certain degree of elastic cushioning, making it less likely to cause internal cracks and damage to the weld and heat-affected zone.

[0053] As a preferred embodiment of the present invention, the fan inlet side pipe 2 includes a horizontal pipe 22, a 90-degree elbow 23, and a vertical pipe 24; wherein, the inlet end of the horizontal pipe 22 is connected to the outlet of the air filter room 3; the lower connecting end of the 90-degree elbow 23 is connected to the outlet end of the horizontal pipe 22; the lower end of the vertical pipe 24 is connected to the upper connecting end of the 90-degree elbow 23, and the upper end of the vertical pipe 24 is connected to the air inlet of the fan 1. The fan inlet side pipe 2 is a carbon steel pipe, preferably 2020*14; it draws in and captures air from the external riser inlet duct of the blower station building, then passes through the air filter room 3, enters the station through the horizontal pipe 22, and then enters the air inlet of the fan 1 through the 90-degree elbow 23.

[0054] As a preferred embodiment of the present invention, the air filter room 3 includes an air filter chamber 31, an air inlet duct 32 disposed at the top of the air filter chamber 31, and an air filter 33 disposed inside the air filter chamber 31; the air outlet of the air filter room is disposed on the side wall of the air filter chamber 31; the air filter 33 is located between the air inlet duct 32 and the air outlet of the air filter room.

[0055] The air entering through the air filter 3 is first filtered to protect the fan 1.

[0056] As a preferred embodiment of the present invention, an adhesive material is used to thoroughly cover and clean the interior of the fan duct after coarse cleaning, until the interior of the fan duct meets the preset requirements. The cleaning of the fan intake side duct includes:

[0057] Divide the interior of the fan ducts after rough cleaning into cleaning zones;

[0058] Apply adhesive material to the pipe sidewalls in the cleaning area in a top-to-bottom order for adhesion and cleaning.

[0059] The cleaned area after adhesion removal is tested for compliance. When the cleaned area after adhesion removal passes the test, it is marked as a qualified area.

[0060] Once all cleaned areas are marked as qualified, the cleaning of the fan intake side duct is complete.

[0061] After rough cleaning, the interior of the fan duct is divided into cleaning zones. Then, the sidewalls of the ducts in each cleaning zone are cleaned sequentially from top to bottom using adhesive material. When the cleanliness of each cleaning zone meets the preset requirements, it is marked and personnel are prohibited from entering. The cleaning of the fan intake side duct is completed when all cleaning zones are marked as qualified.

[0062] In a preferred embodiment of the present invention, during the process of sequentially applying adhesive material clumps to the pipe sidewalls of the cleaning area in a top-to-bottom order for cleaning,...

[0063] Cleaning personnel enter the cleaning area through manhole 25 located on the air inlet side duct 2 of the fan, and perform adhesive cleaning on the inner wall of the cleaning area in order from farthest from manhole 25 to near. This ensures that the cleaning inside the duct is carried out in an orderly manner, and that areas that have passed the cleaning inspection will not be contaminated again.

[0064] As a preferred embodiment of the present invention, the viscous material is dough. It is environmentally friendly and readily available.

[0065] As can be seen from the above specific embodiments, the fan inlet side pipe cleaning method provided by the present invention uses an elastic hammer to evenly tap the outer wall of the weld joint of the fan inlet side pipe, causing the weld slag at the weld joint to fall off. This achieves the goal of thoroughly removing the weld slag at the weld joint while avoiding internal crack damage to the weld and heat-affected zone. By using an adhesive material to comprehensively cover and adhere to the inside of the fan pipe after coarse cleaning, the inner wall of the pipe can be evenly and systematically adhered without dead corners, avoiding the impact of metal dust on human health. The present invention has the advantages of simple method, safety and reliability, time saving, and green and environmentally friendly materials.

[0066] The method for cleaning the inlet-side duct of a fan according to the present invention has been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various modifications can be made to the method for cleaning the inlet-side duct of a fan according to the present invention without departing from the scope of the invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A method for cleaning the intake side pipe of a fan, characterized in that, Includes the following steps: Multiple pipe sections to be welded are welded from the air outlet to the air inlet of the fan to obtain the fan inlet side pipe composed of multiple pipe sections welded together. An elastic hammer is used to evenly tap the outer wall of the weld joint of the air inlet pipe of the fan, so that the weld slag at the weld joint is removed. The welding slag inside the air intake side pipe of the fan is cleaned to remove any visible particles or powder, resulting in a roughly cleaned fan pipe. The cleaning process involves using adhesive clumps to thoroughly cover and clean the interior of the pre-cleaned fan duct until it meets preset requirements, thus completing the cleaning of the fan intake side duct. This includes: dividing the interior of the pre-cleaned fan duct into cleaning zones; sequentially applying adhesive clumps to the sidewalls of each cleaning zone from top to bottom; conducting a qualification test on the cleaned zones; marking any zone that passes the test as a qualified zone; and completing the cleaning of the fan intake side duct when all cleaned zones are marked as qualified.

2. The method for cleaning the air inlet side pipe of a fan according to claim 1, characterized in that, Before welding multiple pipe sections to be welded from the air outlet to the air inlet of the fan to obtain the fan inlet side pipe composed of multiple pipe sections, the process further includes: According to the preset pipe connection drawings, the pipe material is cut to obtain the cut pipe material; The weld joint of the cut pipe is mechanically ground to create a V-shaped bevel, resulting in the pipe section to be welded.

3. The method for cleaning the air inlet side pipe of a fan according to claim 2, characterized in that, In the process of cutting the pipe material according to the preset pipe connection drawings to obtain the cut pipe, an oxyacetylene flame is used to cut the pipe.

4. The method for cleaning the air inlet side pipe of a fan according to claim 1, characterized in that, In the process of welding multiple pipe sections from the air outlet to the air inlet of the fan to obtain the fan inlet side pipe composed of multiple pipe sections, the pipe sections to be welded are welded using argon arc welding.

5. The method for cleaning the air inlet side pipe of a fan according to claim 1, characterized in that, The elastic hammer is a rubber hammer or a wooden mallet.

6. The method for cleaning the air inlet side pipe of a fan according to claim 1, characterized in that, The fan intake duct includes a horizontal pipe, a 90-degree elbow, and a vertical pipe; wherein... The air inlet of the horizontal pipe is connected to the air outlet of the air filter. The lower connecting end of the 90-degree elbow is connected to the air outlet end of the horizontal pipe; The lower end of the vertical pipe is connected to the upper end of the 90-degree elbow, and the upper end of the vertical pipe is connected to the air inlet of the fan.

7. The method for cleaning the air inlet side pipe of a fan according to claim 6, characterized in that, The air filter room includes an air filter chamber, an air inlet duct disposed at the top of the air filter chamber, and an air filter disposed inside the air filter chamber; the air outlet of the air filter room is disposed on the side wall of the air filter chamber. The air filter is located between the air inlet and the air outlet of the air filter.

8. The method for cleaning the air inlet side pipe of a fan according to claim 1, characterized in that, During the process of sequentially applying adhesive material clumps to the pipe sidewalls of the cleaning area in a top-to-bottom order for cleaning,... Cleaning personnel enter the cleaning area through the manhole located on the air inlet side duct of the fan, and perform adhesive cleaning on the inner wall of the cleaning area in order from farthest to near the manhole.

9. The method for cleaning the air inlet side pipe of a fan according to claim 1, characterized in that, The viscous material is dough.

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