Steel lining corrosion repairing structure with rust-proof function

Abstract

The utility model belongs to the technical field of steel rust prevention, and particularly relates to a steel lining corrosion repairing structure with a rust prevention function, which comprises a steel plate and a steel lining, a cutting cavity is arranged on the steel lining, the steel plate is mounted on the steel lining and covers the cutting cavity, and a plurality of active metal bars are arranged on the steel plate. The chemical activity of the active metal bar is larger than the chemical activity of the steel plate and the chemical activity of the steel lining, the active metal bar penetrates through the cutting cavity, and plugging materials are filled in the cutting cavity. According to the electrochemical anti-corrosion principle, corrosion originally generated on the steel lining is transferred to the active metal bar as much as possible, the long-term anti-rust capacity of the steel lining is effectively guaranteed, and the service life of the steel lining is prolonged. The rusty steel lining can be well repaired, the long-term anti-rust capability can be provided, the welding part between the edge of the steel plate and the steel lining is in gentle slope transition, and the local stress can be reduced during overflowing.

Description

Technical Field

[0001] This utility model belongs to the field of steel rust prevention technology, and in particular relates to a steel lining rust repair structure with rust prevention function. Background Technology

[0002] Regarding the aforementioned steel lining corrosion, considering that the corroded area is inside the steel lining and needs to withstand the pressure of high water head and high flow velocity, general steel corrosion treatment processes, such as applying anti-corrosion paint, may not be applicable. Therefore, the available repair methods are limited. Generally, the methods used are local welding repair or local steel lining replacement. Methods such as replacing the corroded steel lining or the inner lining are not considered due to their labor-intensive, costly, and time-consuming construction, and their significant impact on the operation of hydraulic structures.

[0003] Localized welding repair: If the area of ​​the rust-affected hole is small and the depth is not great, localized welding can be used for repair. First, the rust and surrounding material of the perforated area need to be cleaned thoroughly to expose the metallic luster. An angle grinder or similar tool is typically used for grinding, extending the grinding area a certain distance beyond the edge, generally 5-10 cm, to ensure weld quality. Then, welding rods or wires of the appropriate steel material are selected, and a suitable welding process is used to fill the area with weld metal. Finally, the surface is ground smooth and coated with anti-rust paint.

[0004] Partial steel lining replacement method: If the steel has rusted through to a certain extent, cut away the affected area by machining a section of steel extending beyond the rusted zone. Then, fabricate a patch using steel of the same or similar material as the original steel lining. The patch thickness should match the original lining, and its shape should be designed according to the actual cut shape, preferably circular or elliptical to reduce stress concentration. Place the patch over the perforated area and weld using a suitable welding process, such as manual arc welding or CO2 gas shielded welding. Strictly follow the welding procedure specifications during welding, controlling the welding current, voltage, and speed to ensure weld quality and prevent defects. Finally, grind the surface smooth and apply anti-rust paint.

[0005] Both of the above treatment techniques only address the existing rust by removing and replacing the affected areas; they do not address the underlying causes and principles of rust formation for secondary prevention and rust control. Since the root cause of the rust remains, future rusting is inevitable.

[0006] This invention designs a steel-lined rust repair structure with rust prevention function to solve the above problems. Utility Model Content

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A rust repair structure for steel lining with rust prevention function includes a steel plate and a steel lining. The steel lining has a cutting cavity. The steel plate is installed on the steel lining and covers the cutting cavity. Several active metal rods are arranged on the steel plate. The chemical activity of the active metal rods is greater than that of the steel plate and the steel lining. The active metal rods pass through the cutting cavity, and the cutting cavity is filled with sealing material.

[0009] As a preferred option, the steel plate is square, and both the steel plate and the steel lining are made of stainless steel. The active metal rod is cylindrical and is made of zinc.

[0010] As a preferred embodiment, the number of active metal rods is [number], and the active metal rods are arranged in a quincunx pattern on the steel plate.

[0011] As a preferred option, epoxy mortar is used as the sealing material.

[0012] As a preferred option, the steel plate is round, the steel plate material is high-strength steel, and the active metal rod material is aluminum rod.

[0013] As a preferred option, active metal rods are arranged on the steel plate around the center.

[0014] As a preferred option, the sealing material is a corrosion-resistant sealant.

[0015] As a preferred option, the welded edges of the steel plate and the steel lining are gently sloping.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. This utility model utilizes the principle of electrochemical corrosion prevention to transfer the rust that originally occurred in the steel lining to the active metal rod as much as possible, effectively ensuring the long-term rust prevention capability of the steel lining. It can not only repair the rusted steel lining, but also provide long-term rust prevention capability. The welding part between the edge of the steel plate and the steel lining should have a gentle slope transition, which can reduce local stress during flow. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of Embodiment 1 of the present invention.

[0019] Figure 2 This is a three-dimensional schematic diagram of Embodiment 1 of this utility model.

[0020] Figure 3 This is a cross-sectional schematic diagram of Embodiment 1 of this utility model.

[0021] Figure 4 This is a schematic diagram of the active metal rod in Embodiment 1 of this utility model.

[0022] Figure 5 This is a schematic diagram of Embodiment 2 of the present invention.

[0023] Figure 6 This is a three-dimensional schematic diagram of Embodiment 2 of this utility model.

[0024] Figure 7 This is a cross-sectional schematic diagram of Embodiment 2 of this utility model.

[0025] Figure 8 This is a schematic diagram of the active metal rod in Embodiment 2 of this utility model.

[0026] The labels in the diagram are as follows: 101, steel plate; 102, steel lining; 103, concrete; 104, active metal rod; 105, cut cavity. Detailed Implementation

[0027] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following embodiments or drawings are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0028] Example 1:

[0029] A rust repair structure for steel linings with rust prevention function, such as Figure 1 As shown, the device includes a steel plate 101 and a steel liner 102. The steel liner 102 has a cutting cavity 105. The steel plate 101 is installed on the steel liner 102 and covers the cutting cavity 105. Several active metal rods 104 are provided on the steel plate 101. The chemical activity of the active metal rods 104 is greater than that of the steel plate 101 and the steel liner 102. The active metal rods 104 pass through the cutting cavity 105. The cutting cavity 105 is filled with sealing material. The welding edge of the steel plate 101 and the steel liner 102 is gently sloping.

[0030] The steel lining 102 is installed on the concrete 103, and the active metal rod 104 is inserted into the concrete 103. Utilizing the principle of electrochemical corrosion prevention, the rust that originally occurred on the steel lining is transferred to the active metal rod as much as possible, effectively ensuring the long-term rust prevention capability of the steel lining. It can not only repair the rusted steel lining 102, but also provide long-term rust prevention capability. The welded part between the edge of the steel plate 101 and the steel lining 102 should have a gentle slope transition, which can reduce local stress during flow.

[0031] The steel plate 101 is square, and both the steel plate 101 and the steel lining 102 are made of stainless steel. The active metal rod 104 is cylindrical and made of zinc. There are 13 active metal rods 104, which are arranged in a quincunx pattern on the steel plate 101. The sealing material is epoxy mortar.

[0032] Example 2:

[0033] The steel plate 101 is circular and made of high-strength steel. The active metal rod 104 is made of aluminum and is arranged around the center of the steel plate 101. The sealing material is corrosion-resistant sealant.

[0034] The circular steel plate 101 can effectively reduce stress concentration and reduce local stress during flow.

[0035] Steel lining rust repair steps:

[0036] Based on the rusted area of ​​the steel lining 102 installed on the concrete 103, cut and clean the rusted steel lining 102. The cutting area should be larger than the rusted area found. The cutting area forms a cutting cavity 105. Grind the edge of the cutting cavity 105 and clean the loose concrete, water, debris, etc. inside the cutting cavity 105 to ensure that the inside of the cutting cavity 105 is clean and dry.

[0037] According to the arrangement of the active metal rods 104, holes corresponding to the positions of the active metal rods 104 and capable of accommodating the active metal rods 104 are cut in the concrete 103. The depth of the holes is slightly greater than or equal to the length of the active metal rods 104 minus the thickness of the steel lining. Then, air is blown out the powder inside the holes.

[0038] The sealing material is filled into the cut cavity 105, with the filling height lower than the outer surface of the steel lining 102. The sealing material should be plastic before curing and should have certain strength and corrosion resistance after curing. It includes, but is not limited to, cement mortar, epoxy mortar, sealant, structural adhesive, active metal fragments, etc.

[0039] An active metal rod 104 is inserted into the corresponding hole, so that the entire steel plate 101 fits tightly against the steel liner 102 and the steel plate 101 completely covers the cut cavity 105. Then, a suitable welding process is used to weld and grind along the periphery of the steel plate 101 to weld the steel plate 101 onto the steel liner 102.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A steel lining corrosion repair structure with rust prevention function, characterized in that: The device includes a steel plate (101) and a steel liner (102). The steel liner (102) has a cutting cavity (105). The steel plate (101) is installed on the steel liner (102) and covers the cutting cavity (105). Several active metal rods (104) are provided on the steel plate (101). The chemical activity of the active metal rods (104) is greater than that of the steel plate (101) and the steel liner (102). The active metal rods (104) pass through the cutting cavity (105). The cutting cavity (105) is filled with sealing material.

2. The steel lining corrosion repair structure with anti-rust function according to claim 1, characterized in that: The steel plate (101) is square, and both the steel plate (101) and the steel lining (102) are made of stainless steel. The active metal rod (104) is cylindrical and is made of zinc.

3. A steel lining corrosion repair structure with rust prevention function according to claim 2, characterized in that: The number of active metal rods (104) is 13, and the active metal rods (104) are arranged in a quincunx pattern on the steel plate (101).

4. A steel lining corrosion repair structure with anti-rust function according to claim 3, characterized in that: The sealing material is epoxy mortar.

5. A steel lining corrosion repair structure with anti-rust function according to claim 1, characterized in that: The steel plate (101) is circular and made of high-strength steel, while the active metal rod (104) is made of aluminum.

6. A steel lining corrosion repair structure with rust prevention function according to claim 5, characterized in that: The active metal rod (104) is arranged around the center of the steel plate (101) on the steel plate (101).

7. A steel lining corrosion repair structure with rust prevention function according to claim 6, characterized in that: The sealing material is a corrosion-resistant sealant.

8. A steel lining corrosion repair structure with rust prevention function according to claim 1, characterized in that: The welded edges of the steel plate (101) and the steel lining (102) are gently sloping.

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