CN219777442U - Device for evaluating pipeline protection effect of crossing section under complex soil environment - Google Patents

Abstract

The utility model provides a device for evaluating the protection effect of a pipeline at a crossing section under a complex soil environment, which relates to the technical field of pipeline detection and comprises the following components: the current supply device is electrically connected with the pipeline and provides a current source and a flow path; the test piece on-off control device is connected with the pipeline and simulates pipeline leakage points with different areas by executing connection and disconnection control; the reference electrode on-off control device is connected with the pipeline and is arranged on the ground for potential determination; the pipeline testing device is attached to a pipeline to detect and measure the potential and the corrosion rate of the pipeline, so that the technical problems that corrosion evaluation and detection are difficult to develop when the pipeline passes through a horizontal section of the pipeline, and the pipeline protection evaluation effect is difficult to predict when the corrosion-resistant layer is in a damaged degree are solved.

Description

Device for evaluating pipeline protection effect of crossing section under complex soil environment

Technical Field

The utility model belongs to the technical field related to pipeline detection, and particularly relates to a device for evaluating a pipeline protection effect of a crossing section in a complex soil environment.

Background

The pipeline crossing section is used as a special control pipeline section for crossing rivers, highways, railways and the like in a horizontal directional drilling crossing or large excavation construction mode, and if the pipeline in the in-service crossing section is corroded and fails, the pipeline crossing section has the characteristics of serious risk, difficult rush repair, difficult pipe replacement and the like.

The earth surface of the crossing section of the in-service pipeline is often not penetrable, and becomes a blind area for pipeline corrosion detection. At present, detection and evaluation technologies for in-service pipeline crossing sections are few, and for pipelines deeply buried in the ground, conventional equipment detection signals are difficult to reach, non-ground excavation cannot be detected, and detection difficulty is high.

In the prior art, corrosion evaluation and detection are difficult to develop on a horizontal section of a crossing pipeline, and the pipeline protection evaluation effect is difficult to predict under the condition that an anticorrosive layer is damaged.

Disclosure of Invention

The utility model provides a device for evaluating the pipeline protection effect of a crossing section in a complex soil environment, which solves the technical problems that corrosion evaluation and detection are difficult to develop on a horizontal section of the crossing pipeline, and the pipeline protection evaluation effect is difficult to predict under the condition that an anticorrosive coating is damaged. The utility model provides a device for evaluating the protection effect of a pipeline at a crossing section in a complex soil environment, which can directly control the exposed area by arranging test pieces on the pipeline and configuring ground monitoring points, and can detect the electric parameters flowing through the pipeline so as to perform pipeline corrosion detection and evaluation and effectively reduce the detection difficulty.

In order to solve the above problems, the present utility model provides a device for evaluating the protection effect of a pipeline in a crossing section in a complex soil environment, comprising: the current supply device is electrically connected with the pipeline and is used for providing a current source and a flow path; the test piece on-off control device is connected with the pipeline and simulates pipeline leakage points with different areas by executing connection and disconnection control; the reference electrode on-off control device is connected with the pipeline, is arranged on the ground and performs potential determination by executing connection and disconnection control; and the pipeline testing device is attached to the pipeline and is used for detecting and metering the potential and corrosion rate of the pipeline.

Preferably, the flow supply device further comprises: the sacrificial anode system is arranged at the periphery of the pipeline and is used for providing cathodic protection current; the sacrificial anode cable is led out from the sacrificial anode system; the branch box is fixedly connected with the sacrificial anode cable and is used for executing halving operation of the sacrificial anode cable to lead out current; and the pipeline cable is used for connecting the junction box with the tail end of the pipeline.

Preferably, the sacrificial anode cable, the junction box and the pipeline cable are combined and fixedly connected to form a current flow path.

Preferably, the test piece on-off control device comprises: the test piece is assembled with the pipe body of the pipe in a circumferential adhesion way and is used for simulating pipe leakage points with different areas, and reference electrodes are distributed at the preset distance positions of the test piece; the test piece leading-out point junction box is connected with a test piece cable and is arranged on the ground to be a ground test point of the test piece; and one end of the test piece lead-out cable is connected with the test piece, and the other end of the test piece lead-out cable is connected with the test piece lead-out point junction box to serve as a test lead-out wire of the test piece.

Preferably, the test piece comprises a plurality of types and is arranged at a given installation position.

Preferably, the test piece extraction point junction box includes: the test piece testing wiring panel is uniformly arranged in the test piece leading-out point wiring box and is a testing connecting component for leading out cables for the test piece; the jumper pieces are electrically connected with the test strip testing wiring panel, correspond to each other and are used for controlling on-off of the electric communication between the test strip and the pipeline; the test piece testing terminals are wiring terminals arranged on the test wiring panel and correspond to the jumper pieces one by one; the test piece testing junction box body is arranged at the periphery of the test piece leading-out point junction box and is an inlet and outlet assembly for leading out a cable for the test piece.

Preferably, the reference electrode on-off control device comprises: the reference electrode wiring panel is uniformly arranged in the reference electrode on-off control device and is a test connection assembly for leading out a cable for the reference electrode; the near reference electrode test terminal is configured on the reference electrode wiring panel and is used for testing the near reference potential of the test piece; the far reference electrode test terminal is configured on the reference electrode wiring panel and is used for testing the far reference potential of the test piece; the reference electrode test junction box body is arranged at the periphery of the reference electrode electrifying control device and is an inlet and outlet assembly for leading out cables for the reference electrode.

Preferably, the pipe testing device includes: the ER corrosion probe is attached to the pipeline and is an underground testing device; and the pipeline test pile is an overground test port of the ER corrosion probe.

Preferably, the pipe test pile includes: and the test pile test terminal is positioned in the pipeline test pile and is a wiring terminal for leading out a cable for the pipeline.

Preferably, the apparatus further comprises: and the pipeline sign is positioned on the surface of the pipeline and used for representing the direction of oil flow.

The technical scheme of the utility model has at least one or more of the following technical effects:

the utility model provides a device for evaluating the protection effect of a pipeline at a crossing section in a complex soil environment, which comprises the following components: the current supply device is electrically connected with the pipeline and is used for providing a current source and a flow path; the test piece on-off control device is connected with the pipeline and simulates pipeline leakage points with different areas by executing connection and disconnection control; the reference electrode on-off control device is connected with the pipeline, is arranged on the ground and performs potential determination by executing connection and disconnection control; the pipeline testing device is attached to the pipeline and used for detecting and metering the potential and corrosion rate of the pipeline, and the technical problems that corrosion evaluation and detection are difficult to develop when the pipeline passes through the horizontal section of the pipeline and the pipeline protection evaluation effect is difficult to predict when the corrosion-resistant layer is in the damage degree are solved. The conditions of corrosion-resistant layers with different damaged areas of the pipeline are simulated by connecting bare test pieces with different areas with the pipeline. The corrosion rate of the polarized probe between the pipeline and the reference electrode can be tested, so that the pipeline protection effect under different damage areas can be simulated, and direct and reliable experimental data can be provided for evaluating the cathode protection effect of the traversing section.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is an installation diagram of a simulation device of a device for evaluating the protection effect of a pipeline in a crossing section in a complex soil environment, which is provided by an embodiment of the utility model;

fig. 2 is a diagram showing distribution of test pieces and reference electrodes of a device for evaluating the protection effect of a pipeline in a crossing section in a complex soil environment according to an embodiment of the present utility model.

Reference numerals: the flow supply device 1, the sacrificial anode system 11, the sacrificial anode cable 12, the junction box 13, the pipeline cable 14, the test piece on-off control device 2, the test piece 21, the test piece lead-out cable 22, the test piece lead-out point junction box 23, the test piece test junction panel 24, the test piece test terminal 25, the jumper 26, the test piece test junction box body 27, the reference electrode on-off control device 3, the reference electrode junction panel 31, the near reference electrode test terminal 32, the far reference electrode test terminal 33, the reference electrode test junction box body 34, the pipeline test device 4, the ER corrosion probe 41, the pipeline test pile 42, the test pile test terminal 43 and the pipeline marker 5.

Detailed Description

In order to make the above objects, features and advantages of the present utility model more comprehensible, a detailed description of specific embodiments accompanied with figures is provided below. In the following description, numerous details are set forth in order to provide a thorough understanding of the present utility model. The utility model may be embodied in many other forms than described herein without departing from the spirit or scope of the utility model as defined in the following claims.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the embodiments of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of embodiments of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Technical conception

The utility model provides a device for evaluating the pipeline protection effect of a crossing section in a complex soil environment, which solves the technical problems that corrosion evaluation and detection are difficult to develop on a horizontal section of the crossing pipeline in the prior art, and the pipeline protection evaluation effect is difficult to predict under the condition that an anticorrosive layer is damaged.

The technical scheme of the utility model has the following overall structure: the current supply device is electrically connected with the pipeline and is used for providing a current source and a flow path; the test piece on-off control device is connected with the pipeline and simulates pipeline leakage points with different areas by executing connection and disconnection control; the reference electrode on-off control device is connected with the pipeline, is arranged on the ground and performs potential determination by executing connection and disconnection control; the pipeline testing device is attached to the pipeline and is used for detecting and measuring the potential and corrosion rate of the pipeline, the detection and evaluation difficulty of the pipeline at the crossing section is achieved, the control of the buried part device can be directly carried out on the ground test point, the effectiveness and accuracy of the obtained electric data are guaranteed, and the pipeline testing device is used for evaluating the corrosion degree of the pipeline and predicting the protection effect of the pipeline under the condition of damage of the corrosion-resistant layer.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

As shown in fig. 1, the present utility model provides a device for evaluating the protection effect of a pipeline in a crossing section in a complex soil environment, the device comprising: a current supply device 1, wherein the current supply device 1 is electrically connected with a pipeline and is used for providing a current source and a flow path; the test piece on-off control device 2 is connected with the pipeline, and the test piece on-off control device 2 simulates pipeline leakage points with different areas by executing connection and disconnection control; the reference electrode on-off control device 3 is connected with the pipeline, is arranged on the ground and is used for potential determination by executing connection and disconnection control; and the pipeline testing device 4 is attached to the pipeline and is used for detecting and metering the potential and corrosion rate of the pipeline.

Specifically, as shown in fig. 1, the current supply device 1 belongs to a buried device, is disposed around a pipeline, is electrically connected to the pipeline, and can provide a cathodic protection current, and is transmitted to the pipeline based on a current flowing path. The test piece on-off control device 2 determines the exposed test pieces with different areas for test piece connection control so as to simulate the leakage points of the pipelines with different exposed areas, and is convenient for carrying out subsequent electrical parameter tests on the state. The test piece on-off control device 2 comprises an underground part and an overground part, and performs the connection and disconnection control simulation of the underground part based on an overground test point. The reference electrode on-off control device 3 and the test piece on-off control device 2 have a mapping relation, and the mapping relation comprises an underground connection part and an above-ground test point and is used for determining on-off potential. The pipeline testing device 4 is used for parameter detection, and also comprises an underground testing component and an above-ground testing point, and determines the electrical parameters of the pipeline flowing through the connecting and bonding pipeline. The device obtains various electrical parameters of the pipeline through testing so as to determine the protection effect and corrosion condition of the pipeline.

Further, the flow supply device 1 further includes: a sacrificial anode system 11, wherein the sacrificial anode system 11 is arranged at the periphery of the pipeline and is used for providing cathodic protection current; a sacrificial anode cable line 12, said sacrificial anode cable line 12 leading out of said sacrificial anode system 11; the junction box 13 is fixedly connected with the sacrificial anode cable 12 and is used for performing halving operation of leading out current from the sacrificial anode cable 12; a pipe cable 14, the pipe cable 14 is used for connecting the junction box 13 with the tail end of the pipe.

Further, the sacrificial anode cable 12, the junction box 13 and the pipeline cable 14 are combined and fixedly connected to form a current flow path.

Specifically, as shown in fig. 1, the current supply device 1 is a buried device, and is disposed around the pipe, and includes the sacrificial anode system 11, the sacrificial anode cable 12, the junction box 13, and the pipe cable 14. The sacrificial anode cable 12 is led out from the sacrificial anode system 11, and the sacrificial anode cable 12, the junction box 13 and the pipeline cable 14 are combined and fixedly connected to form a current flow path. The sacrificial anode system 11 provides cathodic protection current which is conducted out of the sacrificial anode cable 12, through the junction box 13 and the conduit cable 14, and transmitted to the conduit. The sacrificial anode cable 12 is connected to an inlet point of the junction box 13, and two cables, such as a copper core polyvinyl chloride power cable, are led out from the junction box 13. The current led out by the sacrificial anode cable 12 is subjected to halving operation, so that potential measurement can be conveniently carried out subsequently. The other end of the cable is electrically connected with the tail end of the pipeline. Preferably, the surface of the connection position is cleaned, and the anti-corrosion treatment is performed by adopting the viscoelastic body adhesive tape, so that the connection effect is improved, and the service life is ensured.

The following is a feasible implementation structure, which may be selected but not limited to this, specifically, the sacrificial anode system 11 may be selected from a sleeved magnesium anode, including 1 magnesium anode, 1 lead-out cable, and 1 filler package. Wherein the magnesium anode is selected from the following: pure magnesium, magnesium-manganese alloy or magnesium-aluminum-zinc-manganese alloy, the reference geometrical dimensions are as follows: the length is 700mm, the section is trapezoid, the upper bottom and the lower bottom are 130mm and 150mm, the section height is 125mm, the sacrificial anode cable 12 can be a copper core polyvinyl chloride power cable, and the selected model is VV-1KV 1X 10mm2, and the length is 5m.

Preferably, in order to reduce the ground resistance of the sacrificial anode system 11 and ensure that the current of the sacrificial anode system 11 is continuously and stably output, the sacrificial anode system 11 is generally filled into a filling material in a cotton bag, and is buried in low-resistance soil. The main composition of the filling material is as follows: 75% gypsum powder, 20% bentonite and 5% anhydrous sodium sulfate.

Further, the test piece on-off control device 2 includes: the test piece 21 is assembled with the pipe body of the pipe in a circumferential adhesion way and is used for simulating pipe leakage points with different areas, and reference electrodes are distributed at the preset distance positions of the test piece; a test piece leading-out point junction box 23, wherein the test piece leading-out point junction box 23 is connected with a test piece cable and is arranged on the ground to be a ground test point of the test piece 21; and one end of the test piece lead-out cable 22 is connected with the test piece 21, and the other end is connected with the test piece lead-out point junction box 23 to serve as a test lead-out wire of the test piece.

Further, the test piece 21 includes a plurality of types, and is disposed at a predetermined mounting position.

Further, the test piece extraction point junction box 23 includes: the test piece testing wiring panel 24, wherein the test piece testing wiring panel 24 is uniformly arranged in the test piece leading-out point wiring box and is a testing connection component of the test piece leading-out cable 22; the jumper pieces 26, the jumper pieces 26 are electrically connected with the test piece testing wiring panel 24, and are in one-to-one correspondence, and are used for controlling on-off of the electrical communication between the test piece and the pipeline; the test piece testing terminals 25, wherein the test piece testing terminals 25 are wiring terminals configured on the test wiring panel and are in one-to-one correspondence with the jumper pieces 26; the test piece test connection box body 27, the test piece test connection box body 27 is configured at the periphery of the test piece leading-out point connection box 23, and is an inlet and outlet component of the test piece leading-out cable 22.

Specifically, as shown in fig. 1, the test piece 21 is a component for performing the exposure simulation of the pipeline, one surface of the test piece is made of the same material as the pipeline, and the surface of the test piece is adhered to the pipeline by using epoxy resin, so that different exposed pipeline areas can be provided for simulating the damage condition of the corrosion protection layers of different crossing sections. Specifically, metal test pieces with different exposed areas are installed on the pipe body of the pipeline in different annular directions, the number of the test pieces 21 can be 12, the test pieces comprise various types and specifications, the test pieces are respectively adhered to corresponding positions of the pipeline, and the installation positions of the test pieces 21 can be positioned based on clock coordinates of the pipeline. Preferably, both the side and bottom surfaces of the test piece 21 are sealed with epoxy resin and viscoelastic body, only the surface metal is leaked out to contact with soil, and the material of the connecting surface of the pipe is the same as that of the pipe.

The test piece lead-out cable 22 is used for electrically connecting the test piece 21 which is positioned underground and the test piece lead-out point junction box 23 which is arranged on the ground, and the test piece lead-out point junction box 23 is a ground test point of the test piece 21. The test piece 21 is led out of the cable 22 through the test piece, the electric communication with the pipeline is realized in the test piece leading-out point junction box 23 on the ground, and the test piece leading-out cable 22 needs to be customized according to field requirements, such as cable length and the like.

The test piece leading-out point junction box 23 is used as an on-ground testing device, is of a vertical structure, has good waterproof and dustproof functions, is high in protection level, and is good in grounding effect. Wherein, the test piece leading-out point junction box 23 is internally provided with an overground test point of the exposed test piece leading-out cable 22 at the underground 12 and is also used as a cross-over point of the underground test piece 21. The jumper 26 of the pipeline is connected or disconnected at the test piece leading-out point junction box 23 so as to control the on-off of different test pieces 21, and the electric communication between the exposed test pieces 21 with different areas and the pipeline is conveniently realized on the ground. The test piece 21, which is provided with the test piece lead-out point junction box 23 and is convenient for the electric connection of the test piece lead-out cable 22, is provided with the test connection panel 24 and the jumper 26, and the test piece lead-out point junction box 23 is electrically insulated from the box body. The test strip test terminals 25 are respectively disposed on the test strip test wiring panel 24, and the test strip test terminals 25 are connection terminals of the test strip lead-out cables 22 and are in one-to-one correspondence with the jumper pieces 26. Preferably, a nameplate is attached beside the test strip test terminal 25, and a corresponding test strip 21 is attached for identification control.

The test piece lead-out cable 22 enters the test piece lead-out point junction box 23 from the bottom end of the test piece test junction box body 27, and is connected with the corresponding test piece test terminal 25.

Two cables are led out from the pipeline near the test piece 21 so as to facilitate bridging between the test piece 21 and the pipeline, wherein one cable is a standby cable, and the tail ends of the two cables are led into the ground test piece leading-out point junction box 23.

By designing the connection or disconnection of test strips of different areas to the jumper 26, different ranges of conduit leak areas can be obtained, which are determined by the sum of the areas of the connection test strips.

Further, the reference electrode on-off control device 3 includes: the reference electrode wiring panel 31, the reference electrode wiring panel 31 is uniformly arranged in the reference electrode on-off control device 3, and is a test connection assembly for leading out a cable for the reference electrode; a near reference electrode test terminal 32, wherein the near reference electrode test terminal 32 is configured on the reference electrode wiring panel 31, and is used for testing the near reference potential of the test piece 21; a far reference electrode test terminal 33, wherein the far reference electrode test terminal 33 is configured on the reference electrode wiring panel 31 and is used for testing the far reference potential of the test piece 21; the reference electrode test junction box 34, the reference electrode test junction box 34 is configured at the periphery of the reference electrode power-on control device, and is an inlet and outlet component for leading out a cable for the reference electrode.

Specifically, as shown in fig. 1 and 2, the reference electrode on-off control device 3 includes the reference electrode wiring panel 31, the near reference electrode test terminal 32, the far reference electrode test terminal 33, and the reference electrode test wiring box 34. In this embodiment, the reference electrode may be a long-acting Cu/CuSO4 reference electrode or a solid ceramic Cu/CuSO4 reference electrode. The near reference electrodes are distributed at the near end of the test piece 21 on the pipeline, the test piece 21 corresponds to one of the near reference electrodes respectively, the number is 12, the distance between the corresponding test piece 21 and the near reference electrode is smaller than 5cm, and the test piece 21 is used for testing the instantaneous power-off potential of the test piece 21; the number of the reference electrodes distributed at the far end of the test piece 21 on the pipeline is 2, and the reference electrodes are distributed at the position of not less than 5m at the far end of the test piece 21 and are used for testing the energizing potential of the test piece 21.

Specifically, the reference electrode on-off control device 3 is an overground test point of a near reference electrode at the underground 12 position and a far reference electrode at the underground 2 position. The reference electrode on-off control device 3 is provided with electrode test terminals at 14 parts, and the electrode test terminals are respectively configured on the reference electrode wiring panel 31. Wherein: the upper row and the lower row are 12 parts which are near reference electrode test terminals 32; at the middle 2 is a far reference electrode test terminal 33. A nameplate is attached beside the electrode test terminal, and a corresponding test piece 21 is labeled and connected so as to perform identification connection. The cable connecting the electrode testing terminal and the test piece 21 enters through the bottom of the reference electrode testing junction box 34 and is fixedly connected at the corresponding position, so that the ground test corresponding to the reference electrode potential can be performed.

Further, the pipe test device 4 includes: an ER corrosion probe 41, wherein the ER corrosion probe 41 is attached to the pipeline and is an underground test device; a pipe test stake 42, the pipe test stake 42 being an above-ground test port of the ER corrosion probe 41.

Further, the pipe test stake 42 includes: and the test pile test terminal 43 is positioned in the pipeline test pile and is used for leading out a wiring terminal of a cable for the pipeline.

Specifically, as shown in fig. 1, the ER corrosion probe 41 may be regarded as an independent device for testing parameters such as dc on-off potential, corrosion rate, current density of inflow/outflow of the pipeline under different areas of the exposed test piece 21, so as to determine the protection effect of the real pipeline. The ER corrosion probe 41 is mounted at the end of the pipeline, and is attached to the pipeline to form an underground detection assembly. The outgoing cable of the pipeline is led in from the bottom of the pipeline test pile 42 and is fixedly connected with the test pile test terminal 43. A cable line is additionally led out based on the pipe test pile 42 for fixedly connecting the ER corrosion probe 41.

The specific principle is as follows: the corrosion-resistant layer defect is simulated by utilizing a built-in exposed test piece 21, in the detection process, a pipeline is required to be led out of a cable conductor and is required to be bridged with a lead-out cable conductor of a pipeline test pile 42, the ER corrosion probe 41 and the test piece 21 are electrically connected with each other through the pipeline test pile 42, the test of related parameters can be completed, meanwhile, the resistance change of the probe test piece 21 is measured by using a matched data recorder, the measurement result is converted into the thickness change of the test piece 21, the corrosion rate of the test piece 21 can be obtained, and the protection effect of the pipeline under different exposed point areas is evaluated. Preferably, the ER corrosion probe 41 is made of the same material as the pipe.

Further, the device further comprises: and the pipeline mark 5 is positioned on the surface of the pipeline and used for representing the oil flow direction.

Specifically, as shown in fig. 1, the pipeline mark 5 marks the oil gas transmission direction, the characterization state is an arrow with a given direction, and meanwhile, the pipeline mark 5 can also be used as a reference direction of the clock coordinates of the pipeline to assist in positioning the test piece layout position.

Example two

In order to more clearly explain a technical scheme of a device for evaluating the protection effect of a pipeline in a traversing section in a complex soil environment, the embodiment of the utility model provides a use method of the device for evaluating the protection effect of the pipeline in the traversing section in the complex soil environment, which comprises the following steps:

a cathodic protection current is supplied based on the current supply device 1 and transmitted to the pipe via a current flow path. Based on the test piece on-off control device 2, on-off connection of the pipeline connection test piece 21 is performed on the ground so as to simulate different exposed areas of the pipeline, and on-off control adjustment can be performed based on different detection requirements. Based on the reference electrode on-off control device 3, the instantaneous power-off potential is located on the ground test point, and the instantaneous power-off potential of the near reference electrode and the power-on potential of the far reference electrode are determined. Further, based on the pipe test device 4, an electrical parameter of the pipe circulation is detected. Specifically, during daily operation, the outgoing line of the ER corrosion probe 41 and the pipeline test cable need to be bridged in the test pile, the resistance change of the ER corrosion probe 41 is tested by a special collector and converted into the thickness change of the test piece 21, so as to evaluate the corrosion rate of the pipeline and the protection effect of the pipeline under different leakage areas.

The technical method provided by the embodiment of the utility model has at least the following technical effects or advantages:

the embodiment of the utility model provides a device for evaluating the protection effect of a pipeline at a crossing section in a complex soil environment, which comprises the following components: the current supply device is electrically connected with the pipeline and is used for providing a current source and a flow path; the test piece on-off control device is connected with the pipeline and simulates pipeline leakage points with different areas by executing connection and disconnection control; the reference electrode on-off control device is connected with the pipeline, is arranged on the ground and performs potential determination by executing connection and disconnection control; pipeline testing arrangement, pipeline testing arrangement pastes with the pipeline for carry out pipeline potential and corrosion rate's detection measurement, it is difficult to develop corrosion evaluation and detection to have solved the pipeline horizontal segment that passes through, is difficult to predict the technical problem of pipeline protection evaluation effect under the anticorrosive coating is in damaged degree, through laying the test piece on the pipeline, configuration ground monitoring point can directly carry out the on-off control of test piece, in order to confirm the pipeline of different exposed areas, detect the electrical parameter that the pipeline flows through, in order to carry out pipeline corrosion detection evaluation, can effectively reduce the technological effect of detecting the degree of difficulty.

1. The utility model comprises an underground device part and an overground device part, wherein the underground device part is connected with a pipeline in many ways, different conditions required by execution detection are provided by on-off control, and the overground device part is used for remotely executing execution control of the underground device part, so that the detection operation difficulty is reduced.

2. According to the utility model, the exposed test pieces with different areas are connected with the pipeline, so that the condition of the corrosion-resistant layer with different damaged areas of the pipeline is simulated. The corrosion rate of the polarized probe between the pipeline and the reference electrode can be tested, so that the pipeline protection effect under different damage areas can be simulated, and direct and reliable experimental data can be provided for evaluating the cathode protection effect of the traversing section.

While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the utility model.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the embodiments of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. The device for evaluating the protection effect of the pipeline of the crossing section in the complex soil environment is characterized by comprising:

the current supply device is electrically connected with the pipeline and is used for providing a current source and a flow path;

the test piece on-off control device is connected with the pipeline and simulates pipeline leakage points with different areas by executing connection and disconnection control;

the reference electrode on-off control device is connected with the pipeline, is arranged on the ground and performs potential determination by executing connection and disconnection control;

and the pipeline testing device is attached to the pipeline and is used for detecting and metering the potential and corrosion rate of the pipeline.

2. The apparatus for evaluating the protection effect of a pipeline in a crossing section in a complex soil environment according to claim 1, wherein the flow supply apparatus further comprises:

the sacrificial anode system is arranged at the periphery of the pipeline and is used for providing cathodic protection current;

the sacrificial anode cable is led out from the sacrificial anode system;

the branch box is fixedly connected with the sacrificial anode cable and is used for executing halving operation of the sacrificial anode cable to lead out current;

and the pipeline cable is used for connecting the junction box with the tail end of the pipeline.

3. The apparatus for evaluating the protection effect of a pipeline in a traversing section in a complex soil environment according to claim 2, wherein the sacrificial anode cable, the junction box and the pipeline cable are combined and fixedly connected to form a current flow path.

4. The device for evaluating the protection effect of a pipeline in a crossing section in a complex soil environment according to claim 1, wherein the test piece on-off control device comprises:

the test piece is assembled with the pipe body of the pipe in a circumferential adhesion way and is used for simulating pipe leakage points with different areas, and reference electrodes are distributed at the preset distance positions of the test piece;

the test piece leading-out point junction box is connected with a test piece cable and is arranged on the ground to be a ground test point of the test piece;

and one end of the test piece lead-out cable is connected with the test piece, and the other end of the test piece lead-out cable is connected with the test piece lead-out point junction box to serve as a test lead-out wire of the test piece.

5. The apparatus for evaluating a pipeline protection effect of a traversing section in a complex soil environment according to claim 4, wherein the test pieces comprise a plurality of types and are arranged at predetermined installation positions.

6. The apparatus for evaluating the protection effect of a pipeline in a complex soil environment according to claim 4, wherein the test piece leading-out point junction box comprises:

the test piece testing wiring panel is uniformly arranged in the test piece leading-out point wiring box and is a testing connecting component for leading out cables for the test piece;

the jumper pieces are electrically connected with the test strip testing wiring panel, correspond to each other and are used for controlling on-off of the electric communication between the test strip and the pipeline;

the test piece testing terminals are wiring terminals arranged on the test wiring panel and correspond to the jumper pieces one by one;

the test piece testing junction box body is arranged at the periphery of the test piece leading-out point junction box and is an inlet and outlet assembly for leading out a cable for the test piece.

7. The device for evaluating the protection effect of a pipeline in a traversing section in a complex soil environment according to claim 1, wherein the reference electrode on-off control device comprises:

the reference electrode wiring panel is uniformly arranged in the reference electrode on-off control device and is a test connection assembly for leading out a cable for the reference electrode;

the near reference electrode test terminal is configured on the reference electrode wiring panel and is used for testing the near reference potential of the test piece;

the far reference electrode test terminal is configured on the reference electrode wiring panel and is used for testing the far reference potential of the test piece;

the reference electrode test junction box body is arranged at the periphery of the reference electrode electrifying control device and is an inlet and outlet assembly for leading out cables for the reference electrode.

8. The apparatus for evaluating the protection effect of a pipeline in a traversing section in a complex soil environment as claimed in claim 1, wherein the pipeline testing apparatus comprises:

the ER corrosion probe is attached to the pipeline and is an underground testing device;

and the pipeline test pile is an overground test port of the ER corrosion probe.

9. The apparatus for evaluating the protection effect of a pipeline in a traversing section in a complex soil environment as claimed in claim 1, wherein the pipeline testing pile comprises:

and the test pile test terminal is positioned in the pipeline test pile and is a wiring terminal for leading out a cable for the pipeline.

10. The apparatus for evaluating the protection effect of a pipeline in a traversing section in a complex soil environment as claimed in claim 1, further comprising:

and the pipeline sign is positioned on the surface of the pipeline and used for representing the direction of oil flow.