Substation building anti-corrosion pile cap structure in saline soil area

Abstract

The application belongs to the technical field of pile cap corrosion prevention, and specifically discloses a salted soil area substation building anti-corrosion pile cap structure, which comprises a pile column, a cap poured on the top of the pile column, and a steel mesh fixedly arranged in the cap, and further comprises: a conductive mesh fixedly welded on the inner side of the steel mesh; and an in-cap fixing assembly poured and fixed in the cap. Through the detachable cooperation structure of the in-cap fixing assembly and the built-in anode assembly, and the plug-in type electric connection of the plug-in end assembly, the sacrificial anode can be directly taken out from the ground for replacement when it is consumed abnormally, and meanwhile, the external detection assembly is connected with the conductive mesh and the reference electrode through a cable, so that the steel reinforcement polarization potential can be measured at any time, the working state and the remaining service life of the anode are conveniently detected, and thus the problems that the anode of the existing cathodic protection system cannot be replaced and lacks detection means are solved, and the long-term anti-corrosion protection of the pile cap structure in the salted soil area is ensured.

Description

Technical Field

[0001] This application relates to the field of anti-corrosion technology for pile cap structures, specifically to an anti-corrosion pile cap structure for substation buildings in saline soil areas. Background Technology

[0002] Saline soil areas are rich in chloride and sulfate salts. Their soil resistivity is low and their corrosiveness is strong, which poses a serious threat to the reinforced concrete pile cap structure of buried substation buildings. In the corrosive environment, chloride ions can penetrate into the concrete and destroy the passivation film on the surface of the steel bars, causing electrochemical corrosion of the steel bars, resulting in a decrease in the structural bearing capacity and a shortening of the building's service life.

[0003] Currently, to address the corrosion problem in saline soil areas, engineering projects can employ impressed current cathodic protection or sacrificial anode cathodic protection systems. Among these, the sacrificial anode method has gained some application due to its lack of external power supply and simple maintenance. In pile cap structures, the sacrificial anode is typically connected to the internal steel mesh of the cap via cables to provide cathodic protection for the steel reinforcement.

[0004] However, such anode systems in pile cap structures are usually installed by one-time casting or welding. When the anodes degrade or fail due to use, they cannot be replaced, leading to the failure of the entire cathodic protection system and a significant increase in the risk of corrosion of the pile cap reinforcement. To solve the above problems, existing technologies have proposed detachable connection structures in steel structure or pipeline outer wall scenarios. For example, Chinese patent CN216514143U discloses a sacrificial anode for cathodic protection with a quick-connect structure, which is bolted to the iron core end and welded connecting plate, and is equipped with an anti-corrosion sealing device to achieve quick anode disassembly.

[0005] However, the above-mentioned solution is difficult to apply directly to the built-in cathodic protection system of concrete pile cap. First, the inside of the pile cap is a steel cage skeleton, and the bolt connection structure of the welded connecting plate cannot be accessed after the concrete is poured. Second, the solution lacks the means to detect the working status of the anode, and maintenance personnel have difficulty in determining whether the anode is still within the effective protection range. Therefore, it is necessary to propose a corrosion-resistant pile cap structure for substation buildings in saline soil areas to solve the above problems. Summary of the Invention

[0006] Therefore, this application provides a corrosion-resistant pile cap structure for substation buildings in saline soil areas to solve the problem that the inconvenience of replacing the anode in the cathodic protection system affects the corrosion protection effect of the pile cap structure.

[0007] To achieve the above objectives, this application provides the following technical solution: including piles, a pile cap cast on top of the piles, and a reinforcing mesh fixedly installed inside the pile cap, and further including: The conductive mesh is fixedly welded to the inner side of the steel mesh; An internal fixing component is cast and fixed inside the foundation. The internal fixing component includes a fixing box and an extension cylinder fixedly connected to the bottom of the fixing box. The built-in anode assembly is detachably placed inside the fixed assembly inside the platform. The built-in anode assembly includes a disassembly box placed inside the fixed box, an anode cylinder inserted into the extension cylinder, a sacrificial anode placed inside the anode cylinder, and backfill material filled inside the anode cylinder and the disassembly box. A pluggable end assembly is installed between the internal fixing assembly and the built-in anode assembly. The pluggable end assembly includes a pluggable end and a fixed end that are plugged into each other and electrically connected. The pluggable end is fixedly installed on one side of the disassembly box and electrically connected to the lead wire of the sacrificial anode. The fixed end is fixedly installed inside the fixing box and connected to the conductive mesh via a cable. An external detection component is fixedly installed on the ground at the top of the platform. The external detection component includes a detection module, which is electrically connected to a conductive mesh via a cable. A reference electrode is cast and fixed inside the foundation, and the signal line of the reference electrode is electrically connected to the detection module of the external detection component.

[0008] Optionally, the internal fixing assembly further includes a water-retaining ring plate; The water-blocking ring plate is fixedly connected to the top inner wall of the fixed box. The extension cylinder is symmetrically arranged at the bottom of the fixed box and is arranged inside the mesh of the steel mesh. It is cast and embedded in the inside of the foundation. The fixed box is fixedly arranged inside the soil layer at the top of the foundation. The top of the fixed box is sealed with a sealing component, and the top surface of the sealing component is flush with the top surface of the soil layer on the top of the foundation. The built-in anode component also includes a top cover, which is fixedly installed on the top of the disassembly box.

[0009] Optionally, both the plug-in end and the fixed end include a mounting plate, a housing, screws, and a clamping plate; The mounting plate is fixedly installed on the outer wall of the disassembly box or the inner wall of the fixing box, and the outer shell is fixedly installed on the inner side of the mounting plate. The screw is threadedly connected to the inside of one side of the outer shell, and the clamping plate is movably disposed inside the outer shell, with one end of the screw abutting against one side of the clamping plate.

[0010] Optionally, the fixed end also includes a second conductive plate, which is fixedly connected inside the housing of the fixed end. The cable head of the plug-in end assembly connected to the conductive mesh is squeezed between the clamping plate and the second conductive plate. A protective pipe is sleeved on the outside of the cable between the second conductive plate and the conductive mesh. The protective pipe penetrates the soil layer and is cast and fixed inside the foundation. The plug-in terminal also includes a first conductive plate, which is fixedly connected inside the housing of the plug-in terminal and extends and is inserted into one side of the second conductive plate. The lead end of the sacrificial anode is pressed between the clamping plate and the first conductive plate.

[0011] Optionally, the sealing assembly includes a sealing cap, a first sealing strip, a second sealing strip, and a locking structure; One sealing strip is snapped onto the bottom edge of the sealing cover, and the other sealing strip is snapped onto the top of the water-blocking ring plate. The locking structure is installed at the bottom of the sealing cover, and opening grooves are provided on both sides of the top of the sealing cover.

[0012] Optionally, the locking structure includes a limiting plate, a locking plate, a connecting strip, a rack, a limiting block, a stop block, a gear, a rotating shaft, and a triangular hole; The limiting plates are symmetrically fixedly installed at the bottom of the sealing cover, and the locking plates are symmetrically slidably arranged inside the limiting plates. The two locking plates are fixedly connected by a connecting strip, and the rack is fixedly connected to one side of the connecting strip. The rack and the gear mesh with each other for transmission. The rotating shaft is fixedly connected to the inner wall of the gear, and the rotating shaft is rotatably installed inside the sealing cover. The triangular hole is opened at the top of the rotating shaft.

[0013] Optionally, the limiting block is fixedly connected to the bottom of the sealing cover, and the rack is slidably disposed inside the limiting block; The two stops are fixedly connected to one side of the rack and abut against one side of the limiting block when the rack moves, forming a mechanical stop on the movement of the rack.

[0014] Optionally, the number of racks is four, and the four racks are distributed in a rectangular array along the circumference of the gear. The racks on two opposite sides form a group, and the two groups of racks mesh with the upper and lower sides of the gear respectively. The locking plate is telescopically installed at the bottom of the water-blocking ring plate, and when the locking plate extends and abuts against the bottom of the water-blocking ring plate, the sealing strip one and the sealing strip two are squeezed and sealed against each other.

[0015] Optionally, the detection module includes a support tube, a maintenance box, wiring terminals, and a surge protector; The maintenance box is fixedly installed on the top of the support pipe, and the terminal block and surge protector are fixedly installed inside the maintenance box. The terminal block is connected to the surge protector through a connecting wire, and the terminal block is connected to the conductive mesh through a cable. The cable passes through the inside of the support pipe and extends through the soil layer to the inside of the foundation.

[0016] Optionally, the external detection component further includes a connecting tube and multiple protective tubes; The connecting pipe is fixedly installed at the bottom end of the support pipe, and multiple protective pipes are fixedly connected to the bottom of the connecting pipe. The protective pipe is sleeved on the outside of the cable, and the protective pipe penetrates the soil layer and is cast and fixed inside the foundation. The reference electrode is also provided with a protective shell, and the inside of the protective shell is filled with backfill material. The cable between the reference electrode and the terminal block is located inside one of the protective tubes.

[0017] Compared with the prior art, this application has at least the following beneficial effects: 1. Based on further analysis and research of existing technical problems, this application recognizes the technical problem that in sacrificial anode cathodic protection systems in saline soil areas, the anode will gradually fail due to abnormal consumption during use, and the traditional casting or welding fixing method makes it impossible to replace the anode, resulting in a significant increase in the risk of corrosion in the later stage of the structure. By using a detachable mating structure between the internal fixing component and the built-in anode component, and a plug-in electrical connection setting for the plug-in end component, the sacrificial anode can be directly removed from the ground for replacement when abnormal consumption occurs. At the same time, the external detection component is connected to the conductive mesh and the reference electrode through a cable, which can measure the polarization potential of the steel reinforcement at any time, realizing convenient detection of the working status and remaining life of the anode. This effectively solves the problems of the inability to replace the anode and the lack of detection methods in existing cathodic protection systems, and ensures long-term corrosion protection of pile cap structures in saline soil areas.

[0018] 2. Based on further analysis and research of existing technical problems, this application recognizes the technical problem that moisture and salt in saline soil environments can easily seep into the interior of the fixed box along the sealing structure, leading to corrosion of electrical connectors and a decrease in system reliability. By setting a locking structure at the bottom of the sealing cover for multi-point locking, and cooperating with the mutual compression sealing of sealing strip one and sealing strip two, an effective sealed space is formed inside the fixed box, thereby isolating the intrusion of external corrosive media, ensuring the stability of the working environment of internal electrical connections and anode components, and extending the overall service life of the system.

[0019] 3. Based on further analysis and research of existing technical problems, this application recognizes that cable ends are prone to oxidation or mechanical damage in the humid environment of saline soil, and that traditional welding or permanent crimping methods are difficult to repair on-site after the end is damaged. By plugging and connecting conductive plate one and conductive plate two in the plug-in end assembly, and the detachable crimping structure of screws and clamping plates for the cable end, when the end is damaged, it is only necessary to loosen the screws to re-strip and reconnect the wire without damaging the concrete structure, thereby reducing the difficulty and cost of later maintenance. Attached Figure Description

[0020] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0021] Figure 1 This is a schematic diagram of the overall structure in this application; Figure 2 This is a schematic diagram of the connection structure between the conductive mesh and the external detection component in this application; Figure 3 This is a side cross-sectional schematic diagram of the external detection component and reference electrode in this application; Figure 4 This is a schematic diagram showing the connection between the internal fixing component and the built-in anode component in this application; Figure 5 This is a schematic diagram of the internal structure of the built-in anode assembly in this application; Figure 6 This is a schematic diagram showing the disassembled fixed components and built-in anode components in this application; Figure 7 This is a schematic diagram of the plug-in terminal assembly in this application; Figure 8 This is a schematic diagram showing the positions of conductive plate one and conductive plate two in this application; Figure 9 This is a side sectional view of the plug-in terminal assembly in this application; Figure 10 This is a schematic diagram of the sealing assembly in this application; Figure 11 This is a schematic diagram showing the location of the locking structure in this application; Figure 12 This is a schematic diagram of the locking structure in this application; Figure 13 This is a schematic diagram of the external detection component in this application; Figure 14 For this application Figure 3 Enlarged view of point A; Figure 15 For this application Figure 5 Enlarged view of point B; Figure 16 For this application Figure 5 Enlarged view of point C; Figure 17 For this application Figure 12 Enlarged diagram of point D.

[0022] Explanation of reference numerals in the attached figures: 1. Foundation; 2. Pile; 3. Reinforcing mesh; 4. Conductive mesh; 5. Internal fixing components; 51. Fixing box; 52. Extension tube; 53. Water baffle plate; 6. Built-in anode assembly; 61. Disassembly box; 62. Anode cylinder; 63. Sacrificial anode; 64. Backfill; 65. Top cover; 7. Plug-in terminal assembly; 71. Mounting plate; 72. Housing; 73. Conductive plate one; 74. Screw; 75. Clamping plate; 76. Conductive plate two; 8. Sealing assembly; 81. Sealing cover; 82. Sealing strip one; 83. Sealing strip two; 84. Locking structure; 841. Limiting plate; 842. Locking plate; 843. Connecting strip; 844. Rack; 845. Limiting block; 846. Stop block; 847. Gear; 848. Rotating shaft; 849. Triangular hole; 9. External detection component; 91. Support tube; 92. Inspection box; 93. Wiring terminal; 94. Surge protector; 95. Connecting tube; 96. Protective tube; 10. Reference electrode. Detailed Implementation

[0023] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "including," "comprising," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0025] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to indicate the general relative positional relationship for the purpose of intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationship in the actual product.

[0026] Please see the appendix Figure 1 - Appendix Figure 6This invention provides a corrosion-resistant pile cap structure for a substation building in a saline soil area, including a pile column 2, a cap 1 cast on top of the pile column 2, and a steel mesh 3 fixedly installed inside the cap 1. It also includes a conductive mesh 4 fixedly welded to the inner side of the steel mesh 3. An internal fixing component 5 is cast and fixed inside the cap 1. The internal fixing component 5 includes a fixing box 51 and an extension cylinder 52 fixedly connected to the bottom of the fixing box 51. An internal anode component 6 is detachably placed inside the internal fixing component 5. The internal anode component 6 includes a disassembly box 61 placed inside the fixing box 51, an anode cylinder 62 inserted into the extension cylinder 52, a sacrificial anode 63 placed inside the anode cylinder 62, and backfill material 64 filling the anode cylinder 62 and the disassembly box 61. A top cover 65 is fixedly installed on the top of the disassembly box 61. The plug-in end assembly 7 is installed between the fixed assembly 5 and the built-in anode assembly 6. The plug-in end assembly 7 includes a plug-in end and a fixed end that are plugged into each other and electrically connected. The plug-in end is fixedly installed on one side of the disassembly box 61 and electrically connected to the lead wire of the sacrificial anode 63. The fixed end is fixedly installed inside the fixed box 51 and connected to the conductive mesh 4 by a cable. The external detection assembly 9 is fixedly installed on the ground at the top of the support platform 1. The external detection assembly 9 includes a detection module. The detection module is electrically connected to the conductive mesh 4 by a cable. The reference electrode 10 is cast and fixed inside the support platform 1. The signal line of the reference electrode 10 is electrically connected to the detection module of the external detection assembly 9. The platform fixing component 5 also includes a water-blocking ring plate 53, which is fixedly connected to the top inner wall of the fixing box 51. The extension cylinder 52 is symmetrically arranged at the bottom of the fixing box 51 and is arranged inside the mesh of the steel mesh 3. It is also cast and embedded inside the foundation 1. The fixing box 51 is fixedly arranged inside the soil layer at the top of the foundation 1.

[0027] After the pile 2 is cast, a steel mesh 3 with an internal conductive mesh 4 is fixed on the top of the pile 2. Then, the foundation 1 is cast. Before that, the fixing component 5 inside the foundation is placed on the top of the steel mesh 3. Specifically, the extension tube 52 is inserted through the mesh gap of the steel mesh 3, and the reference electrode 10 with a protective shell is inserted through the mesh gap of the steel mesh 3. At the same time, the protective pipes and protective tubes 96 of multiple cables are placed inside the steel mesh 3. Then, the foundation 1 is cast at the steel mesh 3. At this time, the extension tube 52 of the fixed component 5 inside the platform is cast and fixed inside the foundation 1. As the top soil layer and surface layer of the foundation 1 are laid, the fixing box 51 and some cables are fixed inside the soil layer, and the support pipe 91 is installed on the top of the soil layer, so that the inspection box 92 is set outside to facilitate regular inspection of the corrosion of the pile foundation. Specifically, the lead wire of the sacrificial anode 63 is connected to the conductive mesh 4 through the plug-in terminal assembly 7 and the cable. The conductive mesh 4 is welded to the inside of the reinforcing mesh 3, and the cable head is firmly connected to the conductive mesh 4 by aluminothermic welding or mechanical crimping. The conductive mesh 4 is fixed to the longitudinal main reinforcing bar of the reinforcing mesh 3 by aluminothermic welding or mechanical crimping. The weld joint is sealed with double anti-corrosion sealant of epoxy and heat shrink tubing to ensure the stability of the connection. Since the sacrificial anode 63 and the reinforcing mesh 3 are connected through the cable and the conductive mesh 4, and both are in the same electrolyte environment, the electrochemical environment of the reinforcing mesh 3 in the concrete is simulated by filling the backfill material 64. Electrons flow out from the anode surface and into the reinforcing mesh 3 via the cable and conductive mesh 4. Cations dissolve and are released from the surface of the sacrificial anode 63, migrate in the backfill 64, and reach the surface of the reinforcing mesh 3 to participate in the reduction reaction. The continuous inflow of electrons into the reinforcing bar causes cathodic polarization on its surface, shifting the potential to the negative direction. When the potential of the reinforcing bar is polarized to -0.85V or more, the oxidation and dissolution reaction of iron is thermodynamically completely suppressed, and the corrosion rate is reduced to a negligible level, thereby improving the corrosion resistance of the reinforcing mesh 3 and strengthening the corrosion resistance of the pile cap to cope with the harsh environment of saline soil areas. Please see the appendix Figure 3 Appendix Figure 5 Appendix Figure 6 Appendix Figure 13 Appendix Figure 14 and attached Figure 16 The top of the disassembly box 61 is symmetrically fixed with handles. The maintenance box 92 is fixedly installed on the top of the support pipe 91. The terminal block 93 and the surge protector 94 are fixedly installed inside the maintenance box 92. The terminal block 93 is connected to the surge protector 94 through a connecting wire. The terminal block 93 is connected to the conductive mesh 4 through a cable. The cable passes through the inside of the support pipe 91 and extends through the soil to the inside of the foundation 1.

[0028] Surge protector 94 is connected in parallel to the signal line between terminal 93 and reference electrode 10 or conductive mesh 4. It is used to discharge transient overvoltage and surge current generated by lightning strike or switch operation on the line, control the potential between the two ends of the cable within a safe range, and prevent overvoltage from entering the inside of the maintenance box 92 along the signal line, damaging multimeters and other testing instruments or causing the measurement circuit to break down. The connecting pipe 95 is fixedly installed at the bottom end of the support pipe 91, and multiple protective pipes 96 are fixedly connected to the bottom of the connecting pipe 95. The protective pipe 96 is sleeved on the outside of the cable, and the protective pipe 96 penetrates the soil layer and is cast and fixed inside the foundation 1. The reference electrode 10 is also provided with a protective shell, and the inside of the protective shell is filled with backfill 64. The cable between the reference electrode 10 and the terminal 93 is set inside one of the protective pipes 96. When routinely inspecting the condition of the sacrificial anode 63, open the inspection box 92 and insert the test probes of a multimeter into the test terminals of the wiring terminal 93. Since the wiring terminal 93 is connected to the conductive mesh 4 and the reference electrode 10 via cables, the high input impedance voltage range of the multimeter can be used to measure the potential difference between the steel bar and the reference electrode 10. This potential value reflects the electrochemical thermodynamic state of the steel bar surface under the current environment and the output of the sacrificial anode 63. By comparing the initial reference value, historical data, and theoretical protection threshold, the output current capability and remaining life of the sacrificial anode 63 can be indirectly inferred. When the sacrificial anode 63 is found to be malfunctioning or has lost its function, the sealing assembly 8 can be opened and the sacrificial anode 63 can be removed by pulling it directly downwards into the disassembly box 61 through the handle. The sacrificial anode 63 can be installed and used by replacing the disassembly box 61, the sacrificial anode 63 inside, and the backfill 64. This avoids the inconvenience of replacing the sacrificial anode 63 caused by direct casting. In addition, the use of the external detection assembly 9 facilitates the daily inspection of the sacrificial anode 63. Please see the appendix Figure 5 Appendix Figure 7 - Appendix Figure 12 , Figure 15 and attached Figure 17 The top of the fixed box 51 is sealed with a sealing component 8, and the top surface of the sealing component 8 is flush with the top surface of the soil layer on the top of the foundation 1. Both the plug-in end and the fixed end include a mounting plate 71, a housing 72, a screw 74 and a clamping plate 75. The mounting plate 71 is fixedly installed on the outer wall of the disassembly box 61 or the inner wall of the fixed box 51, and the housing 72 is fixedly installed on the inner side of the mounting plate 71. The screw 74 is threadedly connected to the inside of one side of the housing 72, and the clamping plate 75 is movably disposed inside the housing 72, with one end of the screw 74 abutting against one side of the clamping plate 75.

[0029] The fixed end also includes a second conductive plate 76, which is fixedly connected inside the housing 72 of the fixed end. The cable head connected to the plug-in end assembly 7 and the conductive mesh 4 is squeezed between the clamping plate 75 and the second conductive plate 76. The cable between the second conductive plate 76 and the conductive mesh 4 is sleeved with a protective pipe. The protective pipe penetrates the soil layer and is cast and fixed inside the foundation 1. The plug-in end also includes a first conductive plate 73, which is fixedly connected inside the housing 72 of the plug-in end. The first conductive plate 73 extends and is plugged into one side of the second conductive plate 76. The lead end of the sacrificial anode 63 is squeezed between the clamping plate 75 and the first conductive plate 73. Sealing strip 82 is snapped onto the bottom edge of sealing cover 81, and sealing strip 83 is snapped onto the top of water baffle ring 53. Locking structure 84 is installed at the bottom of sealing cover 81. Opening grooves are provided on both sides of the top of sealing cover 81. Limiting plate 841 is symmetrically fixedly installed at the bottom of sealing cover 81, and locking plate 842 is symmetrically slidably disposed inside limiting plate 841. The two locking plates 842 are fixedly connected by connecting strip 843, and rack 844 is fixedly connected to one side of connecting strip 843. Rack 844 and gear 847 mesh with each other for transmission. The rotating shaft 848 is fixedly connected to the inner wall of the gear 847, and the rotating shaft 848 is rotatably installed inside the sealing cover 81. The triangular hole 849 is opened at the top of the rotating shaft 848. The limiting block 845 is fixedly connected to the bottom of the sealing cover 81, and the rack 844 is slidably arranged inside the limiting block 845. Two stops 846 are fixedly connected to one side of the rack 844 and abut against one side of the limiting block 845 when the rack 844 moves, forming a mechanical stop for the movement of the rack 844.

[0030] There are four racks 844, which are arranged in a rectangular array along the circumference of the gear 847. The racks 844 on two opposite sides form a group, and the two groups of racks 844 mesh with the upper and lower sides of the gear 847 respectively. The locking plate 842 is telescopically set at the bottom of the water baffle plate 53. When the locking plate 842 extends and abuts against the bottom of the water baffle plate 53, the sealing strip 1 82 and the sealing strip 2 83 squeeze each other to seal. When replacing the sacrificial anode 63, specifically, the triangular iron is inserted into the triangular hole 849 and rotated counterclockwise, so that the rotating shaft 848 rotates counterclockwise and drives the four racks 844 to slide inside the limiting block 845. At the same time, the connecting strip 843 and the locking plate 842 are pulled to move, so that the locking plate 842 slides into the limiting plate 841 and moves out from the bottom of the water baffle ring 53. When the stop block 846 abuts against one side of the limiting block 845, the triangular iron is resisted and cannot rotate. At this time, the sealing cover 81 is unlocked from the fixed box 51. Then, the opening slots on both sides of the sealing cover 81 can be pried open with a tool to separate the sealing assembly 8 from the top of the fixed box 51. Then, the built-in anode assembly 6 is taken out. When replacing the new built-in anode assembly 6, the anode cylinder 62 is directly aligned with the extension cylinder 52 and inserted, so that the plug-in end on the outside of the disassembly box 61 is inserted into the fixed end on the inner side wall of the fixed box 51. Specifically, the first conductive plate 73 is inserted into one side of the second conductive plate 76. Since the lead wire end of the sacrificial anode 63 is squeezed between the clamping plate 75 of the plug-in end and the first conductive plate 73, and the cable end connected to the conductive mesh 4 is squeezed between the clamping plate 75 of the fixed end and the second conductive plate 76, when the built-in anode assembly 6 is inserted into the fixed assembly 5 inside the platform, the sacrificial anode 63 can be connected to the steel mesh 3. The clamping plate 75 can be pressed by rotating the screw 74 inward, which is convenient for fixing the cable end. When the cable end is damaged, unscrew the screw 74 outward to loosen the pressure plate 75 on the end, remove the old end, strip and cut the cable, and then reconnect it. After replacing the built-in anode component 6, place the sealing component 8 back on top of the fixed box 51. Rotate the triangle iron clockwise to extend the locking plate 842 and press it against the bottom of the water baffle plate 53, thereby locking the sealing cover 81 at multiple points. This not only firmly fixes the sealing cover 81 to the top of the fixed box 51, but also ensures that the sealing strip 1 82 and sealing strip 2 83 receive stable pressure from multiple points, which can improve the sealing effect and ensure the stability of the working environment inside the fixed box 51.

Claims

1. A corrosion-resistant pile cap structure for a substation building in a saline soil area, comprising piles (2), a cap (1) cast on top of the piles (2), and a steel mesh (3) fixedly installed inside the cap (1), characterized in that, Also includes: The conductive mesh (4) is fixedly welded to the inner side of the steel mesh (3); The platform fixing component (5) is cast and fixed inside the platform (1). The platform fixing component (5) includes a fixing box (51) and an extension cylinder (52) fixedly connected to the bottom of the fixing box (51). The built-in anode assembly (6) is detachably placed inside the fixed assembly (5) of the platform. The built-in anode assembly (6) includes a disassembly box (61) placed inside the fixed box (51), an anode cylinder (62) inserted into the extension cylinder (52), a sacrificial anode (63) placed inside the anode cylinder (62), and backfill material (64) filling the anode cylinder (62) and the disassembly box (61). A plug-in end assembly (7) is installed between the inner fixing assembly (5) and the built-in anode assembly (6). The plug-in end assembly (7) includes a plug-in end and a fixed end that are plugged into each other and electrically connected. The plug-in end is fixedly installed on one side of the disassembly box (61) and electrically connected to the lead wire of the sacrificial anode (63). The fixed end is fixedly installed inside the fixing box (51) and connected to the conductive mesh (4) by a cable. An external detection component (9) is fixedly installed on the ground at the top of the support platform (1). The external detection component (9) includes a detection module, which is electrically connected to the conductive mesh (4) via a cable. The reference electrode (10) is cast and fixed inside the base (1), and the signal line of the reference electrode (10) is electrically connected to the detection module of the external detection component (9).

2. The corrosion-resistant pile cap structure for a substation in a saline-alkali soil area according to claim 1, characterized in that, The platform fixing component (5) also includes a water baffle plate (53); The water-blocking ring plate (53) is fixedly connected to the top inner wall of the fixed box (51), the extension cylinder (52) is symmetrically arranged at the bottom of the fixed box (51), and the extension cylinder (52) is arranged inside the mesh of the steel mesh (3) and cast and embedded in the inside of the foundation (1). The fixed box (51) is fixedly arranged inside the soil layer at the top of the foundation (1). The top of the fixed box (51) is sealed with a sealing component (8), and the top surface of the sealing component (8) is flush with the top surface of the soil layer on the top of the foundation (1). The built-in anode component (6) also includes a top cover (65), which is fixedly installed on the top of the disassembly box (61).

3. The corrosion-resistant pile cap structure for a substation in a saline-alkali soil area according to claim 1, characterized in that, Both the plug-in end and the fixed end include a mounting plate (71), a housing (72), a screw (74), and a clamping plate (75). The mounting plate (71) is fixedly installed on the outer wall of the disassembly box (61) or the inner wall of the fixing box (51), and the outer shell (72) is fixedly installed on the inner side of the mounting plate (71). The screw (74) is threadedly connected to the inside of one side of the outer shell (72). The clamping plate (75) is movably disposed inside the outer shell (72), and one end of the screw (74) abuts against one side of the clamping plate (75).

4. The corrosion-resistant pile cap structure for a substation in a saline-alkali soil area according to claim 3, characterized in that, The fixed end also includes a second conductive plate (76), which is fixedly connected inside the outer shell (72) of the fixed end. The cable head of the plug-in end assembly (7) connected to the conductive mesh (4) is squeezed between the clamping plate (75) and the second conductive plate (76). The cable between the second conductive plate (76) and the conductive mesh (4) is sleeved with a protective pipe. The protective pipe penetrates the soil layer and is cast and fixed inside the foundation (1). The plug-in end also includes a first conductive plate (73), which is fixedly connected inside the housing (72) of the plug-in end, and the first conductive plate (73) extends and is inserted into one side of the second conductive plate (76). The lead end of the sacrificial anode (63) is pressed between the clamping plate (75) and the first conductive plate (73).

5. The corrosion-resistant pile cap structure for a substation in a saline-alkali soil area according to claim 2, characterized in that, The sealing assembly (8) includes a sealing cap (81), a first sealing strip (82), a second sealing strip (83), and a locking structure (84). The sealing strip one (82) is engaged and installed at the bottom edge of the sealing cover (81), and the sealing strip two (83) is engaged and installed at the top of the water baffle plate (53). The locking structure (84) is installed at the bottom of the sealing cover (81), and the top two sides of the sealing cover (81) are provided with opening grooves.

6. The corrosion-resistant pile cap structure for a substation in a saline-alkali soil area according to claim 5, characterized in that, The locking structure (84) includes a limiting plate (841), a locking plate (842), a connecting strip (843), a rack (844), a limiting block (845), a stop block (846), a gear (847), a rotating shaft (848), and a triangular hole (849). The limiting plate (841) is symmetrically fixedly installed at the bottom of the sealing cover (81), and the locking plate (842) is symmetrically slidably disposed inside the limiting plate (841). The two locking plates (842) are fixedly connected by a connecting strip (843), and the rack (844) is fixedly connected to one side of the connecting strip (843). The rack (844) and the gear (847) mesh with each other for transmission. The rotating shaft (848) is fixedly connected to the inner wall of the gear (847), and the rotating shaft (848) is rotatably installed inside the sealing cover (81). The triangular hole (849) is opened at the top of the rotating shaft (848).

7. The corrosion-resistant pile cap structure for a substation in a saline-alkali soil area according to claim 6, characterized in that, The limiting block (845) is fixedly connected to the bottom of the sealing cover (81), and the rack (844) is slidably disposed inside the limiting block (845); The two stops (846) are fixedly connected to one side of the rack (844) and abut against one side of the limiting block (845) when the rack (844) moves, forming a mechanical stop on the movement of the rack (844).

8. The corrosion-resistant pile cap structure for a substation in a saline-alkali soil area according to claim 7, characterized in that, The number of racks (844) is four. The four racks (844) are arranged in a rectangular array along the circumference of the gear (847). The racks (844) on two opposite sides form a group. The two groups of racks (844) mesh with the upper and lower sides of the gear (847) respectively. The locking plate (842) is telescopically disposed at the bottom of the water baffle ring plate (53), and when the locking plate (842) extends and abuts against the bottom of the water baffle ring plate (53), the sealing strip one (82) and the sealing strip two (83) are squeezed and sealed against each other.

9. The corrosion-resistant pile cap structure for a substation in a saline-alkali soil area according to claim 1, characterized in that, The detection module includes a support tube (91), a maintenance box (92), a wiring terminal (93), and a surge protector (94). The maintenance box (92) is fixedly installed on the top of the support pipe (91), and the terminal block (93) and surge protector (94) are fixedly installed inside the maintenance box (92). The terminal block (93) is connected to the surge protector (94) through a connecting wire, and the terminal block (93) is connected to the conductive mesh (4) through a cable. The cable passes through the inside of the support pipe (91) and extends through the soil layer to the inside of the foundation (1).

10. The corrosion-resistant pile cap structure for a substation in a saline-alkali soil area according to claim 9, characterized in that, The external detection component (9) also includes a connecting tube (95) and multiple protective tubes (96). The connecting pipe (95) is fixedly installed at the bottom end of the support pipe (91), and a plurality of the protective pipes (96) are fixedly connected to the bottom of the connecting pipe (95). The protective pipes (96) are sleeved on the outside of the cable, and the protective pipes (96) penetrate the soil layer and are cast and fixed inside the foundation (1). The reference electrode (10) is also provided with a protective shell, and the inside of the protective shell is filled with backfill material (64). The cable between the reference electrode (10) and the terminal block (93) is located inside one of the protective tubes (96).

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