阅读说明：本技术 埋地管防腐层破损模拟试片的接入装置 (Inserting device for buried pipe anticorrosive coating damage simulation test piece ) 是由 魏松林 刘朝 章强 黄红科 娄骁 龚怒 刘大为 张颖 张锋 桂春 于 2020-05-09 设计创作，主要内容包括：本公开属于核电维修技术领域,具体涉及一种埋地管防腐层破损模拟试片的接入装置。本公开实施例通过根据埋设在管道周围的多个试片的断电电位,确定埋地管道的阴极保护电位,由此可以在埋地管道有杂散电流、或牺牲阳极与管道直接相连、或存在外部强制电流设备不能中断的情况下,快速准确地得到埋地钢质管道的阴极保护电位。此外,本公开实施例通过接入装置实现参比电极、试片以及电位测试装置的连接,有利于快速实现系统的线路连接,提高检测效率。(The utility model belongs to the technical field of nuclear power maintenance, concretely relates to access device of buried pipe anticorrosive coating damage simulation test block. According to the embodiment of the disclosure, the cathodic protection potential of the buried pipeline is determined according to the power-off potentials of the test pieces buried around the pipeline, so that the cathodic protection potential of the buried steel pipeline can be quickly and accurately obtained under the condition that the buried pipeline has stray current, or a sacrificial anode is directly connected with the pipeline, or external forced current equipment cannot be interrupted. In addition, this disclosed embodiment realizes reference electrode, test block and electric potential testing arrangement's connection through access device, is favorable to realizing the line connection of system fast, improves detection efficiency.)

1. The utility model provides an access device of buried pipe anticorrosive coating damage simulation test block, a serial communication port, buried pipe anticorrosive coating damage detecting system includes: the test device comprises a wiring board, a reference electrode, a plurality of test pieces, a potential testing device, a synchronous current breaker and a control device;

the test pieces and the reference electrode are buried around a buried pipeline, and the buried pipeline is in a forced current cathodic protection state;

the wiring board comprises a board body, and a first wiring terminal, a plurality of second wiring terminals and a plurality of third wiring terminals which are arranged on the board body;

the potential testing device comprises a plurality of potential acquisition elements;

the reference electrode is connected with the first connecting terminal;

the defect part of each test block is connected with a potential acquisition element through a second connecting terminal, the potential acquisition element is connected with the first connecting terminal, and the material of the defect part is the same as that of the buried pipeline;

the buried pipeline comprises a plurality of welding spots, each welding spot is connected with a potential acquisition element through a third wiring terminal, and the potential acquisition element is connected with the first wiring terminal;

each second connecting terminal is connected with each third connecting terminal through the synchronous current breaker;

the control device is connected with each potential acquisition element, and acquires potential data acquired by each potential acquisition element under the condition that the synchronous current breaker is disconnected;

and the control device determines the protection potential of the buried pipeline according to the acquired potential data.

2. The device for accessing a buried pipe anticorrosive coating damage simulation test piece according to claim 1, wherein the control device determines a minimum value of numerical absolute values of the plurality of potential data, and uses the minimum value as a protection potential of the buried pipeline.

3. The device for accessing the buried pipe anticorrosive coating damage simulation test piece according to claim 1, wherein the device for accessing the buried pipe anticorrosive coating damage simulation test piece comprises a first trigger and a second trigger;

the first trigger is connected with the synchronous current breaker, and the second trigger is connected with each potential acquisition element;

the moment when the first trigger triggers the synchronous current breaker to be switched off is the same as the moment when the second trigger triggers each potential acquisition element to acquire potential data.

4. The device for connecting a buried pipe anticorrosive coating damage simulation test piece according to claim 1, wherein the exposed areas of the defect portions of the test pieces are different from each other.

5. The device for accessing the buried pipe anticorrosive coating damage simulation test piece according to claim 1, wherein the reference electrode is close to the test piece with the largest exposed area of the defect part.

6. The device for connecting a buried pipe anticorrosive coating damage simulation test piece according to claim 1, wherein each test piece further comprises an anticorrosive part, the anticorrosive part wraps the outer side of the defect part, and the anticorrosive part is made of the same material as the anticorrosive coating of the buried pipe.

7. The device for connecting the buried pipe corrosion protection layer damage simulation test block according to claim 1, wherein each test block is buried above the buried pipeline and is linearly arranged along the pipeline.

8. The device for connecting a buried pipe anticorrosive coating damage simulation test piece according to claim 1, wherein the distance between the test pieces is 6 meters to 10 meters.

9. The device for connecting the buried pipe corrosion protection layer damage simulation test piece according to claim 1, wherein the plurality of welding points are distributed at two ends of the buried pipeline.

10. The accessing device of the buried pipe anticorrosive coating damage simulation test piece according to claim 1, wherein a distance between welding points is 50 mm to 60 mm.

Technical Field

The invention belongs to the technical field of nuclear power operation and detection, and particularly relates to an access device of a buried pipe anticorrosive coating damage simulation test piece.

Background

Generally speaking, after the buried pipeline adopts impressed current cathodic protection, if the pipeline has stray current, or the sacrificial anode is directly connected with the pipeline, or there is the condition that outside impressed current equipment can not be interrupted, it will be difficult to reduce the ohmic voltage drop in the soil medium through the outage method, therefore, how to effectively detect out the true potential of cathodic protection of the buried steel pipeline under the condition that the buried pipeline is connected with the sacrificial anode and the stray current is interfered, can design an access device of buried pipe anticorrosive coating damage simulation test block.

Disclosure of Invention

In order to overcome the problems in the related art, the access device of the buried pipe anticorrosive coating damage simulation test piece is provided.

According to an aspect of the disclosed embodiment, an access device for a buried pipe anticorrosive coating damage simulation test piece is provided, which comprises: the test device comprises a wiring board, a reference electrode, a plurality of test pieces, a potential testing device, a synchronous current breaker and a control device;

the test pieces and the reference electrode are buried around a buried pipeline, and the buried pipeline is in a forced current cathodic protection state;

the wiring board comprises a board body, and a first wiring terminal, a plurality of second wiring terminals and a plurality of third wiring terminals which are arranged on the board body;

the potential testing device comprises a plurality of potential acquisition elements;

the reference electrode is connected with the first connecting terminal;

the defect part of each test block is connected with a potential acquisition element through a second connecting terminal, the potential acquisition element is connected with the first connecting terminal, and the material of the defect part is the same as that of the buried pipeline;

the buried pipeline comprises a plurality of welding spots, each welding spot is connected with a potential acquisition element through a third wiring terminal, and the potential acquisition element is connected with the first wiring terminal;

each second connecting terminal is connected with each third connecting terminal through the synchronous current breaker;

the control device is connected with each potential acquisition element, and acquires potential data acquired by each potential acquisition element under the condition that the synchronous current breaker is disconnected;

and the control device determines the protection potential of the buried pipeline according to the acquired potential data.

In one possible implementation, the control device determines a minimum value of numerical absolute values of the plurality of potential data, and takes the minimum value as the protection potential of the buried pipeline.

In one possible implementation manner, the access device of the buried pipe anticorrosive coating damage simulation test piece comprises a first trigger and a second trigger;

the first trigger is connected with the synchronous current breaker, and the second trigger is connected with each potential acquisition element;

the moment when the first trigger triggers the synchronous current breaker to be switched off is the same as the moment when the second trigger triggers each potential acquisition element to acquire potential data.

In one possible implementation, the exposed areas of the defective portions of the test pieces are different from each other.

In a possible implementation mode, the reference electrode is close to the test piece with the maximum exposed area of the defect part.

In a possible implementation manner, each test piece further comprises a corrosion prevention part, the corrosion prevention part is wrapped on the outer side of the defect part, and the material of the corrosion prevention part is the same as that of the corrosion prevention layer of the buried pipeline.

In one possible implementation, each test strip is buried above a buried pipeline and arranged in a line along the pipeline.

In one possible implementation, the spacing between the test strips is between 6 and 10 meters.

In one possible implementation, the plurality of welding points are distributed at both ends of the buried pipeline.

In one possible implementation, the spacing between the solder bumps is between 50 mm and 60 mm.

The invention has the beneficial effects that: according to the embodiment of the disclosure, the cathodic protection potential of the buried pipeline is determined according to the power-off potentials of the test pieces buried around the pipeline, so that the cathodic protection potential of the buried steel pipeline can be quickly and accurately obtained under the condition that the buried pipeline has stray current, or a sacrificial anode is directly connected with the pipeline, or external forced current equipment cannot be interrupted. In addition, this disclosed embodiment realizes reference electrode, test block and potential testing device's connection through the wiring board, is favorable to realizing the line connection of system fast, improves detection efficiency.

Drawings

Fig. 1 is a schematic diagram illustrating an access device of a buried pipe corrosion protection layer damage simulation test strip according to an exemplary embodiment.

Figure 2 is a schematic diagram illustrating a patch panel test connection of an access device for a buried pipe corrosion protection layer damage simulation coupon according to an exemplary embodiment.

Fig. 3 is a schematic diagram illustrating a potential testing device of an access device of a buried pipe corrosion protection layer damage simulation test strip according to an exemplary embodiment.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

Fig. 1 is a schematic diagram illustrating an access device of a buried pipe corrosion protection layer damage simulation test strip according to an exemplary embodiment. Figure 2 is a schematic diagram illustrating a patch panel test connection of an access device for a buried pipe corrosion protection layer damage simulation coupon according to an exemplary embodiment. Fig. 3 is a schematic diagram illustrating a potential testing device of an access device of a buried pipe anticorrosive coating damage simulation test piece according to an exemplary embodiment. As shown in fig. 1 to 3, the access device of the buried pipe corrosion protection layer damage simulation test piece may include: a wiring board 5, a reference electrode 7, a plurality of test pieces 6, a potential testing device 10, a synchronous current breaker 8 and a control device (not shown in the figure);

in the embodiment of the present disclosure, the control device may be represented as a terminal device that performs information processing and program operation, and the control device may be, for example, a programmable logic controller, an application specific integrated circuit, or the like.

As an example of this embodiment, the buried pipeline 1 may be buried under the ground and in a forced current cathodic protection state (not shown in the figure), a plurality of test strips 6 and reference electrodes 7 may be buried around the buried pipeline 1, for example, a plurality of test strips 6 and reference electrodes 7 may be buried above the buried pipeline 1, and a plurality of test strips 6 may be arranged in a straight line along the axis of the buried pipeline 1.

The wiring board 5 may include a board body 20 and a first connection terminal 21, a plurality of second connection terminals 22, and a plurality of third connection terminals 23 provided on the board body 20, wherein the board body 20 may be, for example, an epoxy board, and the first connection terminal 21, the plurality of second connection terminals 22, and the plurality of third connection terminals 23 may be provided on the board body 20. The patch panel 5 may be provided on the ground. The first connection terminals 21, the second connection terminals 22, and the third connection terminals 23 may be completely the same, partially the same, or different from each other.

The reference electrode 7 may be connected to the first connection terminal 21 by a cable.

As shown in fig. 3, the electric potential testing device 10 may include a plurality of electric potential collecting elements 11, and each electric potential collecting element 11 may be used to collect electric potential data. A control device (not shown) may be connected to each potential collecting element 11 of the potential testing device 10.

As shown in fig. 1 and 3, each test piece 6 may include a defect portion (not shown), the defect portion of each test piece 6 may be connected to a second connection terminal 22 through a cable, the second connection terminal 22 may be connected to a potential collecting element 11, and the potential collecting element 11 may be connected to the first connection terminal 21.

The buried pipeline 1 can further comprise a plurality of welding spots 2, the welding spots 2 can be distributed at two ends of the buried pipeline 1, the welding spots 2 can be welded by thermite welding, the distance between the welding spots 2 can be 50 mm to 60 mm, the welding positions of the welding spots 2 can be coated with an anticorrosive coating, and the material adopted by the anticorrosive coating can be the same as the anticorrosive coating of the buried pipeline 1. As shown in fig. 1 and 3, each of the pads 2 may be connected to a third connection terminal 23 by a wire, the third connection terminal 23 may be connected to a potential detecting element 11, and the potential detecting element 11 may be connected to the first connection terminal 21.

As shown in fig. 2, each second connection terminal 22 may be connected to the synchronous breaker 8 via a jumper cable 9, each third connection terminal 23 may be connected to the synchronous breaker 8 via a jumper cable 9, and the synchronous breaker 8 may control the opening and closing of a circuit between each second node terminal 22 and each third connection terminal 23.

The cathodic protection power supply can be controlled to continuously supply constant current to the buried pipeline 1 for a specific duration (for example, 24 hours), so that the buried pipeline 1 and each test block 6 are sufficiently polarized, then the synchronous current breaker 8 can be disconnected, and the control device can acquire potential data acquired by each potential acquisition element 11 under the condition that the synchronous current breaker 8 is disconnected. The control device can determine the protection potential of the buried pipeline 1 according to the acquired potential data. For example, the control means may determine the numerical absolute values of a plurality of potential data and determine the minimum value of the plurality of absolute values (which may represent the maximum extent to which the buried pipeline 1 is polarised) which the control means may use as the protection potential for the buried pipeline 1. Additionally, the control device may use a numerical average of the plurality of potential data as the protection potential of the buried pipeline 1.

According to the embodiment of the disclosure, the cathodic protection potential of the buried pipeline is determined according to the power-off potentials of the test pieces buried around the pipeline, so that the cathodic protection true potential of the buried steel pipeline can be quickly and accurately obtained under the condition that the buried pipeline has stray current, or a sacrificial anode is directly connected with the pipeline, or external forced current equipment cannot be interrupted. In addition, this disclosed embodiment realizes reference electrode, test block and potential testing device's connection through the wiring board, is favorable to realizing the line connection of system fast, improves detection efficiency.

In one possible implementation, the buried pipeline anticorrosive coating damage detection system may further include a first trigger and a second trigger; the first trigger can be connected with the synchronous current breaker, and the second trigger can be connected with each potential acquisition element; the moment when the first trigger triggers the synchronous cutout to be disconnected is the same as the moment when the second trigger triggers each potential acquisition element to acquire potential data. For example, the timers of the first trigger and the second trigger may be synchronized (for example, the first trigger and the second trigger may implement the timer synchronization through a GPS signal, and the first trigger and the second trigger may implement the timer synchronization through other communication methods, which is not limited in this disclosure), so that the first trigger and the second trigger may send trigger signals at the same time, and when the first trigger triggers the synchronous cutout to be closed, the second trigger may trigger each of the potential collecting elements to collect data at the same time. Therefore, the automatic and accurate acquisition of the power-off potential data of each welding spot and each test piece can be realized without a complex control system.

In one possible implementation, the exposed areas of the defective portions of the test pieces may be different from each other. For example, the buried pipeline anticorrosive coating damage detection system can include 4 test pieces, and the exposed area of the defect part of these 4 test pieces can set up to four kinds of 6.5 square centimeters, 20 square centimeters, 50 square centimeters, 100 square centimeters respectively, like this, under the unknown condition of the defect size of buried pipeline, can simulate the polarization state under the different defect size condition of buried pipeline through the test piece of different exposed areas, more accurate definite buried pipeline's cathodic protection electric potential from this.

In one possible implementation, the reference electrode can be close to the test piece with the largest exposed area of the defect part.

In one possible implementation, the spacing between the test strips may be between 6 and 10 meters. Thereby, mutual interference between ground potential gradient fields at adjacent test pieces can be reduced.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.