Hanging type cathode protection detection device for underwater steel structure

Abstract

The invention discloses a hanging type cathode protection detection device for an underwater steel structure, which comprises a cathode protection detector, a hanging type connecting line, a packaging shell and an electromagnetic positioning module, and is characterized in that a detection probe of the cathode protection detector is mounted in the packaging shell, and a detection part of the detection probe is exposed outside the packaging shell; the hanging type connecting line is connected with the packaging shell and provided with a fixing part used for being fixed to the position above the water surface, the electromagnetic positioning module comprises an electromagnetic control switch and an electromagnetic adsorption part, the electromagnetic adsorption part is installed on the outer wall face of the packaging shell, and the electromagnetic control switch is connected with the electromagnetic adsorption part through the hanging type connecting line. Controllable adsorption and separation of the electromagnet ball and the underwater steel structure are achieved by controlling magnetic changes of the electromagnet ball, when the potential of the underwater steel structure is detected, adsorption of the electromagnet ball and the underwater steel structure is limited by the length of the insulating protection pipe, it is ensured that the distance is controllable and not affected by the ocean current effect, and the detection accuracy is improved. And the detection precision of the cathode protection potential of the underwater steel structure is improved.

Description

Technical Field

[0001] The invention relates to the technical field of marine platform corrosion protection detection, and in particular to a hanging cathodic protection detection device for underwater steel structures. Background Art

[0002] Newly built offshore platform jackets, wind turbine foundations, floating structures and other underwater structures are submerged in seawater or sea mud during the service stage. Taking the offshore platform jacket as an example, cathodic protection is usually used to protect the underwater structure, and the effect of cathodic protection is determined by measuring the protection potential of the underwater structure.

[0003] Based on the safety requirements of underwater structures, it is necessary to regularly monitor or detect the potential of underwater structures. Some specifications require that the potential of underwater steel structures such as jackets be detected every year. For underwater structures such as jackets without pre-installed monitoring systems, since the installation of fixed underwater monitoring systems requires underwater operations and is very expensive, it is necessary to use underwater structure cathodic protection potential detection devices that can be operated above the water surface. However, since the underwater detection probes of temporary cathodic protection detection devices are greatly affected by ocean currents, the distance between the detection probes and the underwater steel structures being tested is uncontrollable, resulting in large errors in the detection potential, making it difficult to accurately measure the potential of underwater steel structures.

[0004] Therefore, there is an urgent need for a hanging cathodic protection detection device for underwater steel structures to solve the above technical problems. Summary of the invention

[0005] The present invention aims to solve the above technical problem, that is, to solve the problem that when the existing underwater structure cathodic protection potential detection device operated above the water surface is used for measurement, the underwater detection probe of the temporary cathodic protection detection device is greatly affected by the ocean current, and the distance between the detection probe and the underwater steel structure being measured is uncontrollable, resulting in a large error in the detection potential, making it difficult to accurately measure the potential of the underwater steel structure.

[0006] To this end, the present invention provides a hanging cathodic protection detection device for underwater steel structures, comprising a cathodic protection detector, a hanging connecting line, a packaging shell and an electromagnetic positioning module, wherein the detection probe of the cathodic protection detector is installed in the packaging shell and its detection portion is exposed on the outside of the packaging shell, the hanging connecting line is connected to the packaging shell and is provided with a fixing portion for fixing at a position above the water surface, the electromagnetic positioning module comprises an electromagnetic control switch and an electromagnetic adsorption component, the electromagnetic adsorption component is installed on the outer wall surface of the packaging shell, the electromagnetic control switch is connected to the electromagnetic adsorption component via the hanging connecting line so as to achieve magnetization and adsorption to the underwater steel structure or demagnetization and separation from the underwater steel structure by controlling the on and off of power.

[0007] In the above-mentioned specific implementation of the vertical cathodic protection detection device for underwater steel structures, the number of the electromagnetic adsorption components is plural and they are arranged in a cross shape on the three planes where the XYZ axes of the packaging shell are located.

[0008] In the above-mentioned specific implementation of the vertical cathodic protection detection device for underwater steel structures, the electromagnetic adsorption component includes an electromagnet ball and an insulating protective tube, the insulating protective tube is fixed on the outer wall of the packaging shell, and the electromagnet ball is installed at one end of the insulating protective tube away from the packaging shell.

[0009] In the specific implementation of the above-mentioned vertical cathodic protection detection device for underwater steel structures, the vertical connecting line includes a main cable, one end of the main cable is connected to the electromagnetic control switch, the other end of the main cable is inserted into the packaging shell and connected to multiple branch cables, and the branch cables are inserted into the insulating protective tube and connected to the electromagnet ball.

[0010] In a specific embodiment of the above-mentioned vertical cathodic protection detection device for underwater steel structures, the vertical connecting line also includes a load-bearing cable, one end of the load-bearing cable is fixedly connected to the fixing part, and the other end of the load-bearing cable is fixedly connected to the packaging shell.

[0011] In the specific embodiment of the above-mentioned hanging cathodic protection detection device for underwater steel structures, the cathodic protection detector includes a cathodic protection detection data storage element and the detection probe, and the hanging connecting line also includes a signal cable, one end of the signal cable is connected to the cathodic protection detection data storage element, and the other end of the signal cable extends into the packaging shell and is connected to the detection probe.

[0012] In the specific implementation of the above-mentioned hanging cathodic protection detection device for underwater steel structures, the hanging connecting line also includes a flexible protective tube, which is sleeved on the outside of the load-bearing cable, signal cable and main cable, and the bottom end of the flexible protective tube is fixedly connected to the packaging shell.

[0013] In a specific implementation of the above-mentioned vertical cathodic protection detection device for underwater steel structures, the length of the flexible protective tube is greater than the water depth at the location of the detection probe.

[0014] In the specific implementation of the above-mentioned vertical cathodic protection detection device for underwater steel structures, the insulating protective tube is made of insulating hard plastic.

[0015] In the specific implementation of the above-mentioned vertical cathodic protection detection device for underwater steel structures, a sealant is squeezed and injected between the detection part of the detection probe and the packaging shell.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention controls the magnetic change of the electromagnet ball to achieve controllable adsorption and detachment between the electromagnet ball and the underwater steel structure. When detecting the potential of the underwater steel structure, the adsorption of the electromagnet ball and the underwater steel structure is limited by the length of the insulating protective tube, which ensures that the distance between the underwater steel structure being tested and the detection probe is controllable and not affected by the ocean current, thereby greatly improving the detection accuracy of the cathodic protection potential of the underwater steel structure in service.

[0017] 2. Since the electromagnetic adsorption parts are arranged in a cross shape on the three planes where the XYZ axes of the packaging shell are located, and the number of electromagnetic adsorption parts is large and widely distributed, the packaging shell can be adsorbed with the underwater steel structure at multiple angles, making it easier to connect the packaging shell with the underwater steel structure, improving the adsorption success rate, and having the advantages of quick and convenient installation.

[0018] 3. The lowering, testing and recovery processes of the detection probe are very simple during use. The position of the detection probe can be controlled and adjusted above the water surface. No divers and ROV operations are required, and no ship resources need to be used, which greatly reduces the cost of cathodic protection testing of underwater steel structures in service. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which: Figure 1 It is a schematic diagram of the overall structure of a hanging cathodic protection detection device for underwater steel structures provided by the present invention; Figure 2 It is a schematic diagram of the distribution of the electromagnet balls on the packaging shell.

[0020] List of reference numerals: 1. Detection control module; 101. Cathodic protection detection data storage element; 102. Electromagnetic control switch; 2. Flexible protective tube; 3. Packaging shell; 4. Insulating protective tube; 5. Electromagnetic iron ball; 6. Load-bearing cable; 7. Signal cable; 8. Main cable; 9. Fixed part; 10. Branch cable. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are used to define components, only for the convenience of distinguishing the above components, and unless otherwise stated, the above terms have no special meanings and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The present invention relates to the field of marine platform corrosion protection detection technology, and in particular to a hanging cathodic protection detection device for underwater steel structures. The purpose is to solve the problem that when the existing underwater structure cathodic protection potential detection device operated above the water surface is used for measurement, the underwater detection probe of the temporary cathodic protection detection device is greatly affected by the ocean current, and the distance between the detection probe and the underwater steel structure being measured is uncontrollable, resulting in a large error in the detection potential, making it difficult to accurately measure the potential of the underwater steel structure. To this end, the present invention provides a hanging cathodic protection detection device for underwater steel structures, comprising a cathodic protection detector, a hanging connecting line, a packaging shell and an electromagnetic positioning module, wherein the detection probe of the cathodic protection detector is installed in the packaging shell and its detection portion is exposed on the outside of the packaging shell, the hanging connecting line is connected to the packaging shell and is provided with a fixing portion for fixing at a position above the water surface, the electromagnetic positioning module comprises an electromagnetic control switch and an electromagnetic adsorption component, the electromagnetic adsorption component is installed on the outer wall surface of the packaging shell, the electromagnetic control switch is connected to the electromagnetic adsorption component through the hanging connecting line to achieve magnetization and adsorption to the underwater steel structure or demagnetization and separation from the underwater steel structure by controlling the on and off of power, when detecting the potential of the underwater steel structure, the adsorption of the electromagnetic ball and the underwater steel structure is limited by the length of the insulating protective tube, thereby ensuring that the distance between the underwater steel structure being measured and the detection probe is controllable and not affected by the action of the ocean current, thereby greatly improving the detection accuracy of the cathodic protection potential of the underwater steel structure in service.

[0025] The following is a detailed description of the hanging cathodic protection detection device for underwater steel structures provided by the embodiment of the present invention in conjunction with the accompanying drawings.

[0026] See also Figure 1-2 The present invention provides a hanging cathodic protection detection device for underwater steel structures, comprising a cathodic protection detector, a hanging connecting line, a packaging shell 3 and an electromagnetic positioning module, wherein the detection probe of the cathodic protection detector is installed in the packaging shell 3 and its detection portion is exposed on the outside of the packaging shell 3, the hanging connecting line is connected to the packaging shell 3 and is provided with a fixing portion 9 for fixing at a position above the water surface, the electromagnetic positioning module comprises an electromagnetic control switch 102 and an electromagnetic adsorption component, the electromagnetic adsorption component is installed on the outer wall of the packaging shell 3, the electromagnetic control switch 102 is connected to the electromagnetic adsorption component through the hanging connecting line to achieve magnetization and adsorption to the underwater steel structure or demagnetization and separation from the underwater steel structure by controlling the on and off of power.

[0027] Specifically, the cathodic protection detector includes a cathodic protection detection data storage element 101 and a detection probe, and a sealant is squeezed between the detection part of the detection probe and the packaging shell 3. The sealing inside the packaging shell 3 is ensured. The electromagnetic control switch 102 and the cathodic protection detector are connected to the power module together when in use. The electromagnetic control switch 102 controls the electromagnetic adsorption part to be magnetized and demagnetized by powering off by opening and closing. The electromagnetic control switch 102 and the cathodic protection detection data storage element 101 can be integrated together to form a detection control module 1.

[0028] In the above embodiment, the encapsulation shell 3 can be suspended by the hanging connection line, so that the encapsulation shell 3 can be extended into the water through the hanging connection line to reach the part to be detected. Since the electromagnetic adsorption part has magnetism and can be adsorbed to the underwater steel structure when powered on, it is ensured that the detection probe will not be affected by the ocean current and the distance between it and the underwater steel structure will not be controllable, which greatly improves the detection accuracy of the cathodic protection potential of the underwater steel structure in service. When the detection is completed and the detection probe needs to be detached from the underwater steel structure, it only needs to be detached by turning off the power of the electromagnetic adsorption part through the electromagnetic control switch 102, and the disassembly direction is simple and quick.

[0029] In one embodiment, the electromagnetic adsorption component includes an electromagnet ball 5 and an insulating protective tube 4, wherein the insulating protective tube 4 is fixed to the outer wall of the packaging shell 3, and the electromagnet ball 5 is installed at one end of the insulating protective tube 4 away from the packaging shell 3. The insulating protective tube 4 is made of insulating hard plastic and has rigidity to ensure the stability of the electromagnet ball 5 and prevent it from swaying. When detecting the potential of the underwater steel structure, the adsorption of the electromagnet ball 5 and the underwater steel structure is limited by the length of the insulating protective tube 4, ensuring that the distance between the underwater steel structure being measured and the detection probe is controllable and not affected by the ocean current. The interior of the insulating protective tube 4 is connected to the interior of the packaging shell 3, so that the distribution cable 10 can be inserted from the packaging shell 3 into the insulating protective tube 4. The electromagnet ball 5 is spherical in shape, which is easier to adsorb to the underwater steel structure.

[0030] In one embodiment, see Figure 1-2 The number of electromagnetic adsorption members is multiple and they are arranged in a cross shape on the three planes where the XYZ axes of the packaging shell 3 are located. Figure 1 As shown, the electromagnetic adsorption members are arranged in a cross-shaped pattern on the plane where the Z axis of the packaging shell 3 is located. In order to prevent the electromagnetic adsorption members from affecting the installation of the hanging connecting wires, Figure 1 The top of the packaging shell 3 shown is not equipped with an electromagnetic adsorption component, and this position is used to install a hanging connecting line. Each time, three electromagnetic balls 5 located on different planes are adsorbed with the underwater steel structure, thus forming a triangular adsorption rule, making the packaging shell 3 and the underwater steel structure more stable. In addition, since the electromagnetic adsorption components are arranged in a cross shape on the three planes where the XYZ axes of the packaging shell 3 are located, the number of electromagnetic adsorption components is large and widely distributed, so that the packaging shell 3 can be adsorbed with the underwater steel structure at multiple angles, so that the packaging shell 3 is easier to connect with the underwater steel structure, the success rate of adsorption is improved, and it has the advantages of quick and convenient installation.

[0031] In this application, see Figure 1 The hanging connecting line includes a main cable 8, one end of which is connected to the electromagnetic control switch 102, the other end of which is inserted into the encapsulation shell 3 and connected to multiple branch cables 10, and the branch cables 10 are inserted into the insulating protective tube 4 and connected to the electromagnet ball 5. The hanging connecting line also includes a load-bearing cable 6, one end of which is fixedly connected to the fixing part 9, and the other end of which is fixedly connected to the encapsulation shell 3. Before the detection, the position for fixing the hanging connecting line is determined, and the fixing part 9 is fixed to the position. The fixing part 9 includes a hanging plate, and a hanging hole is opened on the hanging plate. The fixing part 9 is fixed to the designated position of the underwater steel structure by screws passing through the hanging hole, thereby realizing a detachable connection between the fixing part 9 and the underwater steel structure. It should be noted that the fixing method of the fixing part 9 and the underwater steel structure described above is only an example, and it can be flexibly set according to actual conditions without deviating from the basic principles of the present invention.

[0032] In the present application, the hanging connecting line also includes a signal cable 7, one end of the signal cable 7 is connected to the cathodic protection detection data storage element 101, and the other end of the signal cable 7 extends into the packaging shell 3 and is connected to the detection probe, so that the information detected by the detection probe is transmitted to the cathodic protection detection data storage element 101.

[0033] In one embodiment, the hanging connecting line further includes a flexible protective tube 2, which is sleeved on the outside of the bearing cable 6, the signal cable 7 and the main cable 8, and the bottom end of the flexible protective tube 2 is fixedly connected to the packaging shell 3. The length of the flexible protective tube 2 is greater than the water depth at the location of the detection probe. The flexible protective tube 2 is sealed with the packaging shell 3, which protects the bearing cable 6, the signal cable 7 and the main cable 8 from contact with seawater and erosion by seawater.

[0034] In order to ensure that seawater does not enter the interior from the top of the flexible protective tube 2, a sealing plug is embedded in the top of the flexible protective tube 2. The main cable 8, the load-bearing cable 6 and the signal cable 7 all pass through the sealing plug and extend into the flexible protective tube 2. The sealing plug and the flexible protective tube 2, as well as the sealing plug and the main cable 8, the load-bearing cable 6 and the signal cable 7 are sealed with sealant.

[0035] When the hanging cathodic protection detection device provided by the present invention is used to measure the cathodic protection potential of an underwater steel structure, the position and water depth of the point to be measured on the underwater steel structure are first determined. The position of the fixing part 9 above the water surface is determined according to the position of the point to be measured on the underwater steel structure. The required length of the flexible protective tube 2 is determined according to the height of the fixed position and the water depth of the point to be measured, ensuring that after the flexible protective tube 2 is lowered, the water depth of the detection probe and the position of the point to be measured of the underwater structure are basically consistent.

[0036] Lower the flexible protective tube 2 and the detection probe to the vicinity of the point to be tested.

[0037] The electromagnetic control switch 102 is turned on to energize the electromagnet ball 5, and the electromagnet ball 5 is magnetized and adsorbed to the position of the to-be-measured point on the underwater steel structure.

[0038] When the flexible protective tube 2 cannot be pulled up, it indicates that the electromagnet ball 5 is firmly adsorbed to the underwater steel structure.

[0039] Measure and record the potential measurement value displayed by the cathodic protection detector. This potential measurement value is the potential value of the test point of the underwater steel structure.

[0040] After the measurement is completed, the electromagnetic ball 5 is powered off through the electromagnetic control switch 102 to demagnetize the electromagnetic ball 5 and separate it from the underwater steel structure.

[0041] The above steps can be repeated to reselect new underwater structure test points for measurement.

[0042] After the measurement is finished, the device of the present invention can be directly lifted up and recovered.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hanging cathodic protection detection device for underwater steel structures, characterized in that: It includes a cathodic protection detector, a hanging connection line, a packaging shell and an electromagnetic positioning module, wherein the detection probe of the cathodic protection detector is installed in the packaging shell and its detection part is exposed on the outside of the packaging shell, the hanging connection line is connected to the packaging shell and is provided with a fixing part for fixing it above the water surface, and the electromagnetic positioning module includes an electromagnetic control switch and an electromagnetic adsorption component, the electromagnetic adsorption component is installed on the outer wall of the packaging shell, and the electromagnetic control switch is connected to the electromagnetic adsorption component through the hanging connection line to achieve magnetization and adsorption to the underwater steel structure or demagnetization and separation from the underwater steel structure by controlling the on and off of power.

2. The hanging cathodic protection detection device for underwater steel structures according to claim 1, characterized in that: The number of the electromagnetic adsorption members is plural and they are arranged in a cross shape on three planes where the XYZ axes of the packaging shell are located.

3. The hanging cathodic protection detection device for underwater steel structures according to claim 1, characterized in that: The electromagnetic adsorption member comprises an electromagnet ball and an insulating protective tube, wherein the insulating protective tube is fixed on the outer wall surface of the packaging shell, and the electromagnet ball is installed on an end of the insulating protective tube away from the packaging shell.

4. The hanging cathodic protection detection device for underwater steel structures according to claim 3, characterized in that: The hanging connecting line includes a main cable, one end of which is connected to the electromagnetic control switch, and the other end of which is inserted into the packaging shell and connected to multiple branch cables, which are inserted into the insulating protective tube and connected to the electromagnetic ball.

5. The hanging cathodic protection detection device for underwater steel structures according to claim 4, characterized in that: The hanging type connecting line also includes a load-bearing cable, one end of which is fixedly connected to the fixing portion, and the other end of which is fixedly connected to the packaging shell.

6. The hanging cathodic protection detection device for underwater steel structures according to claim 5, characterized in that: The cathodic protection detector includes a cathodic protection detection data storage element and the detection probe, and the hanging connection line also includes a signal cable, one end of the signal cable is connected to the cathodic protection detection data storage element, and the other end of the signal cable extends into the packaging shell and is connected to the detection probe.

7. The hanging cathodic protection detection device for underwater steel structures according to claim 6, characterized in that: The hanging type connecting line also includes a flexible protective tube, which is sleeved on the outside of the load-bearing cable, the signal cable and the main cable, and the bottom end of the flexible protective tube is fixedly connected to the packaging shell.

8. The hanging cathodic protection detection device for underwater steel structures according to claim 7, characterized in that: The length of the flexible protective tube is greater than the water depth at the location of the detection probe.

9. The hanging cathodic protection detection device for underwater steel structures according to claim 3, characterized in that: The insulating protective tube is made of insulating hard plastic.

10. The hanging cathodic protection detection device for underwater steel structures according to claim 1, characterized in that: Sealant is squeezed and injected between the detection part of the detection probe and the packaging shell.

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