A port wharf steel pile sacrificial anode cathodic protection device and installation method

Abstract

The application discloses a kind of port steel pile sacrificial anode cathodic protection device and installation method, it includes suspension pedestal, support piece, sacrificial anode and feeder cable, suspension pedestal is connected with the structural reinforcement in the upper structure of wharf and each steel pile electric connection, support piece is connected in suspension pedestal bottom, and the outer surface of support piece is provided with anode fixing device, sacrificial anode is fixed around support piece by anode fixing device, feeder cable is connected sacrificial anode and suspension pedestal, forms "primary cell" structure, to realize the protection of steel pile.The device is pre-installed by sacrificial anode, avoids underwater operation, reduces the installation safety risk of sacrificial anode cathodic protection system, improves installation efficiency, and it is convenient to realize the monitoring and detection of sacrificial anode current, effect is remarkable, convenient for use.

Description

Technical Field

[0001] This invention belongs to the field of steel structure corrosion protection technology, and particularly relates to a sacrificial anode cathodic protection device and installation method for steel piles in port terminals. Background Technology

[0002] Port and wharf steel piles are exposed to the marine environment for extended periods, suffering severe corrosion from seawater. Current technology typically employs a combination of coating and sacrificial anodes to protect the steel piles. Sacrificial anodes are usually installed on the pile surface by divers using underwater welding after the main wharf construction is completed. However, underwater welding is a complex, inefficient, and high-risk process, and is significantly affected by wind and waves during construction.

[0003] Currently, the assessment of sacrificial anode dissolution mainly relies on underwater probing of the anode's dimensions. However, this method cannot accurately determine the anode's consumption status. In fact, tracking and measuring the emitted current of the sacrificial anode can more accurately determine its consumption status and assess its remaining lifespan, providing support for the redesign of steel pile corrosion protection. However, implementing current detection or installing a current monitoring system on sacrificial anodes installed via underwater welding is challenging. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a sacrificial anode cathodic protection device for steel piles in port terminals. This protection device has a simple structure, is easy to install, requires no underwater welding, and can effectively reduce the installation risk of sacrificial anodes and improve installation efficiency.

[0005] This invention is achieved through the following technical solution:

[0006] A sacrificial anode cathodic protection device for steel piles at a port wharf includes a suspension base, a support member, a sacrificial anode, and a power supply cable. The suspension base is connected to the structural steel reinforcement within the wharf's superstructure, achieving electrical connection with the steel pile through the structural steel reinforcement. The support member is fixed to the bottom of the suspension base, and its outer surface is equipped with an anode fixing device. The sacrificial anode is fixed to the outside of the support member via the anode fixing device. One end of the power supply cable is connected to the sacrificial anode, and the other end is connected to the suspension base. The device forms a "galvanic cell" structure, thereby achieving protection for the steel pile.

[0007] Compared with the prior art, the sacrificial anode cathodic protection device of the present invention pre-installs the sacrificial anode at the bottom of the dock by setting a suspension base and support components, eliminating the need for underwater welding, reducing the installation safety risk of the sacrificial anode cathodic protection system, effectively improving installation efficiency, and is easy to install, with significant effects, making it easy to promote and use.

[0008] Furthermore, the device also includes a current testing window, a current monitoring sensor, and a data acquisition unit. The current testing window is mounted on the support member, and the current monitoring sensor is installed on the feed cable through the current testing window to collect current data and transmit it to the external data acquisition unit. This monitors the current changes in the feed cable throughout the entire process and, through further analysis, determines the dissolution status of the sacrificial anode. When performing sacrificial anode current detection, a clamp meter can be used to measure the current flowing through the feed cable through the current testing window.

[0009] Furthermore, the support component comprises one or more hollow pipes, each with flanges at both ends, and the pipes are connected by flanges. Several pipes are connected according to the required installation depth of the sacrificial anode to form the support component. The support component is then fixed to the suspension base below by flanges. The support component, composed of multiple hollow pipes, is adaptable to a wider range of port terminals of different sizes and different sacrificial anode installation locations, effectively improving the utilization rate of the device and solving the installation problem in confined spaces under the terminal.

[0010] Furthermore, the anode fixing device includes two clamps, which are respectively fixed to the outer wall of the support member. The positions of the two clamps are determined according to the size of the sacrificial anode.

[0011] Furthermore, the clamp includes a fixed plate and a movable plate, both of which have bolt holes and semi-circular grooves at relatively opposite positions. When fixing the sacrificial anode, the iron core of the sacrificial anode is placed in the semi-circular groove of the fixed plate, the movable plate covers the iron core, bolts pass through the corresponding bolt holes, and nuts lock the bolts in place. The sacrificial anode is fixed to the support member by the clamp's fixed and movable plates, avoiding underwater welding during on-site construction and improving construction safety.

[0012] Furthermore, the upper part of the suspension base is provided with hooks for connecting to the structural reinforcing bars, and the lower part is provided with flanges that match the support member. The suspension base is connected to the structural reinforcing bars via hooks, and the lower part is connected to the flange of the support member, thereby fixing the support member. The hook design of the suspension base makes the installation of the suspension base more stable and facilitates the electrical connection between the suspension base and the structural reinforcing bars through welding or other methods.

[0013] Preferably, a buffer pad is provided inside the semi-circular groove. Providing a buffer pad inside the semi-circular groove can further stabilize the sacrificial anode core, preventing it from moving, and also reduces the possibility of the sacrificial anode core breaking due to wind and waves during subsequent use.

[0014] The present invention also provides an installation method for a sacrificial anode cathodic protection device for steel piles at port terminals, which includes the following steps:

[0015] Step 1: Connect the hooks on the upper part of the suspension base to the structural steel bars, and adjust the position of the suspension base so that the bottom surface of the suspension base is flush with the bottom of the upper structure of the wharf;

[0016] Step 2: Fix the sacrificial anode in the anode fixing device;

[0017] Step 3: Weld one end of the feed cable to the sacrificial anode and connect the other end to the suspension base;

[0018] Step 4: Connect and secure the support to the bottom of the suspension base.

[0019] This device is installed and fixed using the above method, making it easy to operate. It eliminates the need for underwater welding, reducing construction risks and improving construction efficiency.

[0020] Furthermore, in step two, a current testing window is opened on the surface of the support, and a current monitoring sensor is installed on the feed cable.

[0021] Preferably, in step three, the weld joints between the feed cable and the sacrificial anode and the suspension base are protected with a coating. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a sacrificial anode cathodic protection device for steel piles at a port terminal according to the present invention;

[0023] Figure 2 This is a schematic diagram of the suspension base in a sacrificial anode cathodic protection device for steel piles at a port terminal according to the present invention;

[0024] Figure 3 This is a schematic diagram of the support component in a sacrificial anode cathodic protection device for steel piles at a port terminal according to the present invention;

[0025] Figure 4 This is a schematic diagram of the anode holder in a sacrificial anode cathodic protection device for steel piles at a port terminal according to the present invention.

[0026] The attached diagrams illustrate the following: 1-Dock superstructure; 2-Steel pile; 3-Structural reinforcement; 4-Suspension base; 41-Hook; 42-Bolt; 5-Pipe; 51-Upper flange; 52-Lower flange; 53-Anode holder; 54-Cable hole; 55-Flange bolt hole; 56-Flange bolt; 57-Current test window; 531-Fixing plate; 532-Moving plate; 533-Semi-circular groove; 534-Bolt hole; 535-Fixing bolt; 536-Fixing nut; 6-Sacrificial anode; 61-Sacrificial anode core; 7-Feeder cable. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] Please refer to Figure 1 Port terminals generally consist of pile foundations and a superstructure 1. The pile foundation includes several steel piles 2. During the construction of the port terminal, the steel piles 2 are electrically connected through the structural steel bars 3 inside the superstructure 1. When the port terminal is put into use, the steel piles 2 will be subject to seawater erosion. Therefore, this embodiment provides a sacrificial anode cathodic protection device for protecting the steel piles 2 of the port terminal. The device includes a suspension base 4, a support member, a sacrificial anode 6, and a feed cable 7. The suspension base 4 is connected to the structural steel bars 3 inside the superstructure 1 to achieve electrical connection with the steel piles 2. The support member is fixed to the bottom of the superstructure 1 through the suspension base 4. The sacrificial anode 6 is fixed around the support member through an anode fixing device. One end of the feed cable 7 is connected to the sacrificial anode 6, and the other end is connected to the suspension base 4, thereby achieving electrical connection between the sacrificial anode 6 and the steel piles 2 and protecting the steel piles 2.

[0030] Specifically, such as Figure 2 As shown, the suspension base 4 is made of stainless steel or galvanized steel. It is disc-shaped and has a hook 41 at the top for easy suspension and welding to the structural steel bar 3. It has several bolts 42 at the bottom, which are connected to the support member 5 to fix the support member 5 under the upper structure 1 of the dock.

[0031] Specifically, such as Figure 3 As shown, the support component is a hollow plastic pipe, consisting of one or more pipes 5. Each pipe 5 has a flange at both its upper and lower ends. The upper flange 51 has flange bolt holes 55, and the lower flange 52 has flange bolts 56. The specifications of the flange bolts 56 and flange bolt holes 55 are the same as those of the bottom bolts 42 of the suspension base. The positions of the upper flange bolt holes 55 correspond to the positions of the bottom bolts 42 and lower flange bolts 56 of the suspension base. The pipes 5 are connected by flanges and secured with nuts. The number of pipe segments can be increased according to on-site construction needs to adjust the length of the support component and meet construction requirements.

[0032] like Figure 4 As shown, an anode fixing device is provided on the outer surface of the support. In this embodiment, the anode fixing device includes two anode clamps 53, which are fixed on the outer wall of the support. The distance between the two anode clamps 53 matches the size of the sacrificial anode 6. Each anode clamp 53 includes a fixed plate 531 and a movable plate 532. The fixed plate 531 is fixed on the support. The fixed plate 531 and the movable plate 532 are respectively provided with corresponding semi-circular grooves 533 at their middle relative positions. The radius of the semi-circular grooves 533 matches the sacrificial anode core 61. Through fixing screw holes 534 are provided around the semi-circular grooves 533. When fixing the sacrificial anode 6, the sacrificial anode core 61 is placed in the semi-circular groove 533 of the fixed plate 531. The movable plate 532 presses on the fixed plate 531 and passes through the fixing bolt 535 to close the two parts. Finally, the fixing nut 536 is used to fix the sacrificial anode 6 to the side of the support.

[0033] In this embodiment, a cable hole 54 is provided near any anode holder 53 on the outside of the support member. The cable hole 54 has a fixed connector. One end of the power supply cable 7 is connected to the sacrificial anode core 61, and the other end passes through the cable hole 54, enters the interior of the support member 5, and is led upward to the suspension base 4, thereby connecting the sacrificial anode 6 and the steel pile 2 to achieve protection of the steel pile 2.

[0034] Furthermore, a current testing window 57 is provided at the upper end of the support component. The current testing window 57 is located on the water surface. The operator can insert a clamp ammeter into the support component through the current testing window 57 to measure the current flowing through the feeder cable 7. At the same time, after the feeder cable 7 is connected, a current monitoring sensor is installed on the feeder cable 7 through the current testing window 57 to monitor the changes in the current flowing through the feeder cable 7 and transmit the data to the data acquisition instrument for easy storage and subsequent analysis and processing.

[0035] In this embodiment, a rubber pad is provided in the semi-circular groove 533 of the fixed plate 531 and the movable plate 532 to make the sacrificial anode core 61 more firmly fixed and less likely to break during use.

[0036] Based on the above technical solution, this device is installed using the following installation method:

[0037] Step 1: Suspend and weld the hook 41 of the suspension base 4 to the structural steel bar 3, and adjust the position of the suspension base 4 so that the bottom surface of the suspension base 4 is level with the bottom of the upper structure 1 of the wharf.

[0038] Step 2: Place the sacrificial anode 6 in the anode holder 53, place the sacrificial anode core 61 in the semi-circular groove 533 of the fixing plate 531 of the upper and lower holders, press the movable plate 532 on the fixing plate 531, and lock the movable plate 532 and the fixing plate 531 by the fixing bolt 535 and the fixing nut 536, thereby fixing the sacrificial anode 6.

[0039] Step 3: Weld one end of the feeder cable 7 to the sacrificial anode core 61, apply a protective coating to the weld, and pass the other end of the feeder cable 7 through the cable hole 54 into the inside of the pipe 5, and pull it out from the upper port of the pipe 5.

[0040] Step 4: Extend multiple pipes 5 as needed to form a support. Each time the pipe is extended, pull the power supply cable 7 out from the upper end of the newly connected pipe 5. Finally, weld the power supply cable 7 to the suspension base 4 and apply a protective coating to the weld.

[0041] Step 5: Open a current test window 57 on the surface of the support component and install a current monitoring sensor on the feed cable 7;

[0042] Step 6: Connect the support to the suspension base 4, align the bolt hole 55 of the upper flange of the pipe with the bolt 42 at the bottom of the suspension base, and secure it with a nut.

[0043] As can be seen from the above installation process, this device avoids underwater operations by pre-installing the sacrificial anode, reduces the installation safety risks of the sacrificial anode cathodic protection system, improves installation efficiency, and is easy to install with significant effects, making it easy to promote and use. At the same time, this device uses a current monitoring sensor to monitor the current of the feeder cable at all times, solving the problem that the emission current of the sacrificial anode is difficult to measure in the past. It can accurately determine the corrosion status of the sacrificial anode, and the installation of the current monitoring sensor and the detection of the current can be carried out on the water without diving operations, reducing the risk.

[0044] The above description is only a part of the embodiments of the present invention, and is not intended to limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the content of the present invention specification should be included within the protection scope of the present invention.

Claims

1. A sacrificial anode cathodic protection device for steel piles at port terminals, characterized in that, The system includes a suspension base, a support component, a sacrificial anode, and a power supply cable. The suspension base is fixedly connected to the structural steel reinforcement within the superstructure of the wharf. The support component is fixedly connected to the bottom of the suspension base, and its outer surface is provided with an anode fixing device. The sacrificial anode is fixed to the outside of the support component via the anode fixing device. The support component consists of one or more hollow pipes, each with flanges at both ends, and the pipes are connected to each other via flanges. The support component is connected to the suspension base via flanges. One end of the power supply cable is connected to the sacrificial anode, and the other end is located inside the support component and connected to the suspension base. The anode fixing device includes two clamps, which are respectively fixed to the outer wall of the support component. Each clamp includes a fixed plate and a movable plate, and bolt holes and semi-circular grooves are provided at opposite positions on the fixed plate and the movable plate. The upper part of the suspension base is provided with hooks for connecting to the structural steel reinforcement, and the lower part is provided with flanges that match the support component.

2. The sacrificial anode cathodic protection device for steel piles at port terminals according to claim 1, characterized in that, It also includes a current test window, a current monitoring sensor, and a data acquisition device. The current test window is set on the support, and the current monitoring sensor is installed on the feed cable to collect current data and transmit it to the data acquisition device of the peripheral device.

3. The sacrificial anode cathodic protection device for steel piles at port terminals according to claim 1, characterized in that, A buffer pad is provided inside the semi-circular groove.

4. A method for installing a sacrificial anode cathodic protection device for steel piles at a port wharf as described in any one of claims 1-3, characterized in that, Includes the following steps: Step 1: Connect the hooks on the upper part of the suspension base to the structural steel bars, and adjust the position of the suspension base so that the bottom surface of the suspension base is flush with the bottom of the upper structure of the wharf; Step 2: Fix the sacrificial anode in the anode fixing device; Step 3: Weld one end of the feed cable to the sacrificial anode and connect the other end to the suspension base; Step 4: Connect and secure the support to the bottom of the suspension base.

5. The installation method of a sacrificial anode cathodic protection device for steel piles in a port terminal according to claim 4, characterized in that, In step two, a current testing window is opened on the surface of the support component, and a current monitoring sensor is installed on the feed cable.

6. The installation method of a sacrificial anode cathodic protection device for steel piles at a port wharf according to claim 4, characterized in that, In step three, the welded joints between the power supply cable and the sacrificial anode and suspension base are protected with a coating.

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