An on-line wear-resistant repairing method and system for elbow part of dust removal pipeline

Abstract

The application discloses an online wear-resistant repairing method and system for a dust-removing pipeline elbow, and the method comprises the following steps: setting a material blocking layer on the damaged part of the elbow, and the material blocking layer completely covers the damaged part; fixing a prefabricated storage box on the outer wall of the elbow around the material blocking layer, so that the material blocking layer is completely located in the storage space of the storage box; injecting wear-resistant slurry into the storage box through a feeding pipe until the wear-resistant slurry fills the storage box; and after the wear-resistant slurry in the storage box is solidified, the repairing of the damaged part of the elbow is completed; the application covers the material blocking layer on the damaged part of the elbow, then fixes and installs the storage box around the material blocking layer, and finally injects the wear-resistant slurry into the storage box, so that the high-strength wear-resistant material can be covered around the damaged part, the long-term impact of iron powder or iron slag can be resisted, even if a dent is impacted on the high-strength wear-resistant material, the iron powder or iron slag will be accumulated in the dent, and then the accumulated iron powder or iron slag can resist the impact of the iron powder or iron slag in the pipeline.

Description

Technical Field

[0001] This invention belongs to the field of dust removal pipeline repair technology, and particularly relates to an online wear-resistant repair method and system for the elbow of a dust removal pipeline. Background Technology

[0002] Dust collection ducts are pre-installed pipes connected to dust collection equipment to guide the flow of dust, smoke, or particulate matter. Common dust collection ducts are made of steel or iron and are installed in the workshop according to a predetermined route, depending on the specific structure of the workshop. In steel plants, in addition to dust, dust collection ducts also contain small amounts of iron powder or slag. These iron powders or slags flow through the dust collection ducts. When they reach bends in the dust collection ducts, the iron powders or slags impact the outer bend of the bend due to the need for a change in direction. Over time, this impact can cause damage to the outer bend of the dust collection duct. After damage, a hole appears at the outer bend of the bend, and dust, iron powder, and slag can fly out from the hole, thus polluting the surrounding environment.

[0003] When a leak is found in an elbow, the conventional repair method is to weld a steel plate over the leak to seal it. However, after the dust removal equipment has been used for a period of time, the leak will reappear, requiring further repairs. This repeated process not only increases production costs but also exacerbates environmental pollution. Summary of the Invention

[0004] The purpose of this invention is to provide an online wear-resistant repair method and system for dust removal pipe bends. By adding a repair layer to the outside of the leak, it can be used for a long time, avoiding frequent repairs of the leak.

[0005] This invention adopts the following technical solution: an online wear-resistant repair method for bends in dust removal pipelines, comprising the following steps:

[0006] A retaining layer is installed at the damaged area of ​​the bend, and the retaining layer completely covers the damaged area;

[0007] The prefabricated storage box is fixed to the outer wall of the elbow around the baffle layer, so that the baffle layer is completely located within the storage space of the storage box.

[0008] The wear-resistant slurry is injected into the storage box through the injection pipe until the storage box is full;

[0009] After the wear-resistant slurry in the storage box has solidified, the damaged part of the elbow is repaired.

[0010] Furthermore, in the dust removal pipeline, when the damaged area of ​​the elbow is under negative pressure, the baffle layer is a flexible baffle layer, and the area of ​​the baffle layer is larger than the area of ​​the damaged area.

[0011] Furthermore, in the dust removal pipeline, when the damaged area of ​​the elbow is under positive pressure, the baffle layer is a rigid baffle layer, and the area of ​​the baffle layer is larger than the area of ​​the damaged area.

[0012] Furthermore, when the retaining layer is a rigid retaining layer, the rigid retaining layer is a steel plate.

[0013] Furthermore, when the rigid retaining layer is a steel plate, the steel plate is spot-welded to the outer wall of the elbow.

[0014] Furthermore, fixing the prefabricated storage box to the outer wall of the elbow around the retaining layer includes:

[0015] The contact edges between the storage box and the outer wall of the elbow are continuously welded to ensure a sealed connection between the storage box and the outer wall of the elbow.

[0016] Furthermore, the wear-resistant slurry is made of high-strength wear-resistant material.

[0017] Another technical solution of the present invention: an online wear-resistant repair system for the elbow of a dust removal pipeline, including a baffle layer, which is used to completely cover the damaged part of the elbow;

[0018] It also includes a storage box with an opening on one side, which is used to cover the outside of the baffle layer, and the edge of its opening side is sealed to the outer wall of the elbow to form a closed space inside the storage box.

[0019] The enclosed space is completely filled with high-strength abrasion-resistant material formed by the solidification of abrasion-resistant slurry.

[0020] Furthermore, in the dust removal pipeline, when the damaged area of ​​the elbow is under negative pressure, the baffle layer is a flexible baffle layer.

[0021] Furthermore, in the dust removal pipeline, when the damaged part of the bend is under positive pressure, the baffle layer is a rigid baffle layer.

[0022] The beneficial effects of this invention are as follows: By covering the damaged area of ​​the bend with a baffle layer, fixing and installing a storage box around the baffle layer, and finally injecting wear-resistant slurry into the storage box, this invention achieves the covering of the damaged area with high-strength wear-resistant material, which can withstand the long-term impact of iron powder or iron slag. Even if a dent is impacted on the high-strength wear-resistant material, the iron powder or iron slag will remain and accumulate inside the dent, and then the accumulated iron powder or iron slag will further resist the impact of iron powder or iron slag in the pipeline. Attached Figure Description

[0023] Figure 1 This is a reference diagram showing the construction status of an online wear-resistant repair method for a dust removal pipe bend according to the present invention.

[0024] Among them: 1. Elbow; 2. Injection pipe; 3. Injection ball valve; 4. Storage box; 5. Material retaining layer; 6. Discharge ball valve; 7. Damaged part; 8. Discharge pipe. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0026] For existing dust collection pipelines, the bends at the outer bends are prone to damage and leaks due to prolonged impact from iron powder or slag inside the pipeline. A common repair method requires shutting down the system to eliminate the positive or negative pressure inside the pipeline before welding an iron plate to seal the leak. However, shutting down the system inevitably leads to production stoppages, impacting efficiency. If the iron plate is welded directly without shutting down, the positive or negative pressure inside the pipeline makes it difficult to achieve a complete seal. For example, when there is positive pressure inside the pipeline, the leak creates pressure outwards. During welding, the molten iron is blown away by the positive pressure, making welding difficult. Furthermore, as the welding progresses, when only a small gap remains to be welded, it's like a high-pressure air gun blowing outwards, making it difficult to seal the final gap. When the dust collection pipeline has negative pressure, the welding difficulty is the same as with positive pressure, except that negative pressure is equivalent to a high-pressure air gun blowing into the pipeline, making it particularly difficult to seal the final gap.

[0027] This invention discloses an online wear-resistant repair method for the elbow of a dust removal pipeline, such as... Figure 1 As shown, the repair includes the following steps: a retaining layer 5 is installed at the damaged area of ​​the elbow, completely covering the damaged area; a prefabricated storage box 4 is fixed to the outer wall of the elbow around the retaining layer 5, so that the retaining layer 5 is completely located within the discharge space of the storage box 4; wear-resistant slurry is injected into the storage box 4 through the injection pipe 2 until the wear-resistant slurry fills the storage box 4; after the wear-resistant slurry in the storage box 4 solidifies, the repair of the damaged area of ​​the elbow is completed.

[0028] This invention covers the damaged area of ​​the bend with a baffle layer, then fixes a storage box around the baffle layer, and finally injects wear-resistant slurry into the storage box. This achieves the effect of covering the damaged area with high-strength wear-resistant material, which can withstand the long-term impact of iron powder or iron slag. Even if a dent is impacted on the high-strength wear-resistant material, the iron powder or iron slag will remain and accumulate inside the dent, and then the accumulated iron powder or iron slag will further resist the impact of iron powder or iron slag in the pipeline.

[0029] In this embodiment of the invention, when the damaged area at the bend in the dust collection duct is under negative pressure, the baffle layer 5 is a flexible baffle layer, and the area of ​​the baffle layer is larger than the area of ​​the damaged area. Specifically, a fiber bag can be used as the baffle layer. Of course, the fiber bag should be much larger than the hole to prevent the negative pressure from sucking the fiber bag out of the hole and flying it away into the dust collection duct.

[0030] In another embodiment, when the damaged area of ​​the elbow in the dust removal duct is under positive pressure, the retaining layer 5 is a rigid retaining layer, and the area of ​​the retaining layer is larger than the area of ​​the damaged area. Specifically, when the retaining layer 5 is a rigid retaining layer, the rigid retaining layer is a steel plate. When the rigid retaining layer is a steel plate, the steel plate is spot-welded to the outer wall of the elbow. As mentioned above, when under positive pressure, it is difficult to completely seal and weld the steel plate to the elbow without stopping the machine; therefore, in this embodiment, it is only necessary to spot-weld it to the elbow. This is because, in this embodiment, wear-resistant slurry needs to be injected into the storage box 4. Since the steel plate has completely covered the gaps, most of the wind force has been reflected back into the dust removal pipe. There are only some gaps between the steel plate and the elbow. Since most of the wind force has been reflected back into the dust removal pipe, the remaining wind force intensity has been greatly reduced. When the wear-resistant slurry flows into the storage box 4 and flows through these gaps, the smaller wind force will prevent the wear-resistant slurry from being injected into the dust removal pipe. As more and more wear-resistant slurry is injected, it will eventually fill the storage box 4 and form a wear-resistant material layer on the outside of the steel plate.

[0031] Preferably, the thickness of the wear-resistant layer needs to be greater than the thickness of the steel plate, and preferably close to the diameter of the elbow. This ensures that the weight of the wear-resistant layer is within the capacity of the dust removal pipe, while also increasing the thickness of the wear-resistant layer and enhancing its impact resistance.

[0032] To better secure the wear-resistant material layer to the outer wall of the elbow, the contact edges between the storage box 4 and the outer wall of the elbow are continuously welded to ensure a sealed connection. This connection between the storage box 4 and the elbow increases the bonding strength between the wear-resistant material layer and the elbow, preventing the wear-resistant material layer from detaching from the outer wall of the elbow.

[0033] In this embodiment, the wear-resistant slurry is made of high-strength wear-resistant material. High-strength wear-resistant material is a special dry-mixed wear-resistant material with a reasonable gradation, produced industrially using composite additives and high-molecular polymers. It features low wear loss, strong impact resistance, high compressive strength, convenient construction, and easy repair.

[0034] The present invention also discloses an online wear-resistant repair system for the elbow of a dust removal pipeline, including a baffle layer 5, which is used to completely cover the damaged part 7 of the elbow 1; it also includes an open storage box 4, the opening of which is used to cover the outside of the baffle layer 5, and the edge of the opening is sealed to the outer wall of the elbow 1 to form a closed space inside the storage box 4; the closed space is completely filled with high-strength wear-resistant material formed by the solidification of wear-resistant slurry.

[0035] Specifically, when the damaged area of ​​the elbow in the dust collection duct is under negative pressure, the baffle layer 5 is a flexible baffle layer, which can be made of materials such as fiber bags. When the damaged area of ​​the elbow in the dust collection duct is under positive pressure, the baffle layer 5 is a rigid baffle layer, which can be made of materials such as steel plates.

[0036] In addition, a filling pipe 2 and a discharge pipe 8 are respectively provided on the two opposite side plates of the storage box 4. The filling pipe 2 is used to connect with the external feed pipe so that the wear-resistant slurry can enter the storage box 4. The discharge pipe 8 is used to detect whether the wear-resistant slurry in the storage box 4 is full.

[0037] In this embodiment of the invention, since the storage box 4 is to be fixed on the elbow 1, the storage box 4 is composed of four side plates and one bottom plate. The top of the four side plates is sealed to the outer wall of the elbow 1, and the bottom of the four side plates is sealed to the bottom plate. Moreover, the adjacent edges of the four side plates are sealed to ensure that the storage box 4 is a sealed space.

[0038] In another embodiment, the storage box can be sealed and connected by an annular plate and a base plate. The upper end of the annular plate is cut into a shape that conforms to the outer wall of the elbow 1 and is sealed and connected to the outer wall of the elbow 1. The lower end of the annular plate is sealed and connected to the base plate.

[0039] In summary, the shape of the storage box 4 is not limited to the above structure. It can be designed according to the specific construction conditions on site. It is only necessary to ensure that the storage box 4 forms a closed space after being connected to the elbow.

[0040] Specifically, an injection ball valve 3 is installed on the injection pipe 2, and a discharge ball valve 6 is installed on the discharge pipe 8. The injection ball valve 3 is used to regulate the opening and closing of the injection pipe 2, as well as the injection speed. The discharge valve 6 is used to regulate the opening and closing of the discharge pipe 8. When injection is required, the discharge valve 6 is opened. When the wear-resistant slurry flows out from the discharge pipe 8, it indicates that the storage box 4 is full. At this time, the discharge valve 6 is closed, and pressurized grouting is carried out through the injection pipe 2 to further compact the wear-resistant layer until the grouting in the storage box 4 is completed.

Claims

1. An online wear-resistant repair method for the elbow of a dust removal pipeline, characterized in that, Includes the following steps: A retaining layer (5) is provided at the damaged part (7) of the elbow (1), and the retaining layer (5) completely covers the damaged part (7); The prefabricated storage box (4) is fixed on the outer wall of the elbow around the baffle layer (5) so that the baffle layer (5) is completely located in the storage space of the storage box (4); Abrasion-resistant slurry is injected into the storage box (4) through the injection pipe (2) until the abrasion-resistant slurry fills the storage box (4). After the wear-resistant slurry in the storage box (4) solidifies, the repair of the damaged part (7) of the elbow (1) is completed; When the damaged part (7) of the elbow (1) in the dust removal pipeline is under negative pressure, the baffle layer (5) is a flexible baffle layer, and the area of ​​the baffle layer (5) is larger than the area of ​​the damaged part (7). When the damaged part (7) of the elbow (1) in the dust removal pipeline is under positive pressure, the baffle layer (5) is a hard baffle layer, and the area of ​​the baffle layer (5) is larger than the area of ​​the damaged part (7).

2. The online wear-resistant repair method for a dust removal pipe bend as described in claim 1, characterized in that, When the retaining layer (5) is a rigid retaining layer, the rigid retaining layer is a steel plate.

3. The online wear-resistant repair method for a dust removal pipe bend as described in claim 2, characterized in that, When the rigid retaining layer is a steel plate, the steel plate is spot welded to the outer wall of the elbow (1).

4. The online wear-resistant repair method for the elbow of a dust removal pipeline as described in any one of claims 2-3, characterized in that, Fixing the prefabricated storage box (4) to the outer wall of the elbow around the baffle layer (5) includes: The material storage box (4) is continuously welded to the contact edge of the outer wall of the elbow to ensure a sealed connection between the material storage box (4) and the outer wall of the elbow.

5. The online wear-resistant repair method for a dust removal pipe bend as described in claim 4, characterized in that, The wear-resistant slurry is made of high-strength wear-resistant material.

6. An online wear-resistant repair system for dust collector pipe bends, characterized in that, Includes a retaining layer (5), which is used to completely cover the damaged area of ​​the elbow; It also includes a storage box (4) with an opening on one side, the storage box (4) is used to cover the outside of the baffle layer (5), and the edge of its opening side is sealed to the outer wall of the elbow to form a closed space inside the storage box (4); The enclosed space is completely filled with high-strength abrasion-resistant material formed by the solidification of abrasion-resistant slurry. When the damaged part of the elbow in the dust removal pipeline is under negative pressure, the baffle layer (5) is a flexible baffle layer; When the damaged part of the elbow in the dust removal pipeline is under positive pressure, the baffle layer (5) is a hard baffle layer; The storage box (4) is also provided with a feeding pipe (2) and a discharging pipe (8) on its two opposite side plates.

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