CN214838847U

CN214838847U - Pipeline tracing system

Info

Publication number: CN214838847U
Application number: CN202022909100.XU
Authority: CN
Inventors: 唐亮; 杨树伟; 庞慧萍; 杨伟
Original assignee: Hohhot China Gas Urban Gas Development Co ltd
Current assignee: Hohhot China Gas Urban Gas Development Co ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-11-23
Anticipated expiration: 2030-12-07

Abstract

The utility model provides a tracer system for apply alternating current signal to the tracer line and produce the position in magnetic field so that survey the pipeline, tracer system includes: at least one tracer line installed around each of the plurality of pipes; the detection pile is buried between pipe networks formed by a plurality of pipelines and comprises a main body part and at least one communication link, and the communication link is at least used for sending alternating current signals to the tracing lines and sending power supply voltage to the tracing lines. According to the utility model discloses pipeline tracer system monitors effectively in real time and maintains the break-make of spike line to effectively guarantee pipeline engineering's quality and progress, can check fast and accept and realize automated management to the condition of laying of spike line.

Description

Pipeline tracing system

Technical Field

The utility model relates to a pipe laying field especially relates to a pipeline tracer system, especially a gas pipeline tracer system.

Background

The pipe (abbreviated as PE pipe) made of Polyethylene (PE) has the advantages of convenient construction, low engineering cost compared with steel pipe (DN300), no corrosion leakage problem, small pollution to transported substances and the like, and is widely applied to urban pipe networks in recent years, in particular to gas pipe networks and tap water pipe networks.

Although the PE pipeline has many advantages, the low strength of the PE pipeline is the biggest disadvantage, the accurate position is not clear in municipal pipe network construction, the PE pipeline is easy to dig and break in mechanical construction, and gas leakage accidents also happen occasionally, so the work of detecting and calibrating the position of the PE pipeline is very important. The PE pipeline is made of inert materials, is non-conductive and non-magnetic, and is buried underground, and no good method is available for directly detecting the spatial position of the PE pipeline underground on the ground at present.

In order to solve the problem that the buried depth and the position of a PE pipeline can be accurately detected on the ground after the PE pipeline is buried, one or two conducting wires (called tracer wires for short) are usually buried along with the PE pipeline in the pipe network laying construction, and the conducting wires are used for detecting the position of the PE pipeline in future. The tracing line is a detection method generally adopted at home and abroad at present. How to enable the tracing line to play the greatest role in buried construction is important.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model aims to overcome above technical problem, improve current spike line, improve its performance.

The utility model provides a tracer system for apply alternating current signal to the tracer line and produce the position in magnetic field so that survey the pipeline, tracer system includes:

at least one tracer line installed around each of the plurality of pipes;

the detection pile comprises a main body part and at least one communication link, and the communication link is at least used for sending an alternating current signal to the tracing line and sending power supply voltage to the tracing line.

Wherein the ac signal and/or the supply voltage is transmitted by wire and/or wirelessly.

Wherein the body portion further comprises a signal receiver for receiving feedback data from the trace line.

Wherein the state of the trace line is judged locally by a processor at the main body part or remotely by a server connected through a network, and an alarm is issued if the trace line is out of order.

Wherein the body portion reports the current location, number or geographical information while the alert is issued.

Wherein the trace line comprises:

the elastic body is positioned in the center of the tracing line;

a plurality of signal lines symmetrically distributed around the elastomer for receiving and transmitting the alternating current signal through the communication link;

a plurality of power lines distributed over the surface of the trace line for receiving said power supply voltage over said communication link;

a plurality of first spacers positioned between adjacent signal lines for improving mechanical strength;

a plurality of second spacers, which are located between each power line and an adjacent signal line, and are made of the same material as the pipe;

and the filling layer is filled in the tracing lines.

Wherein the pipe and the plurality of second spacers are made of PE material.

Wherein the elastic modulus of the elastomer is less than the elastic modulus of the other structures of the trace.

The power lines and the signal lines are made of non-magnetic metal materials.

Wherein heat generated by the power supply voltage in the vicinity of the plurality of power supply lines causes the plurality of second spacers to be fused with the duct.

According to the utility model discloses pipeline tracer system monitors effectively in real time and maintains the break-make of spike line to effectively guarantee pipeline engineering's quality and progress, can check fast and accept and realize automated management to the condition of laying of spike line.

The objects of the invention, as well as other objects not listed here, are met within the scope of the independent claims of the present application. Embodiments of the invention are defined in the independent claims, with specific features being defined in the dependent claims.

Drawings

The technical solution of the present invention is explained in detail below with reference to the accompanying drawings, in which:

fig. 1 is a conceptual diagram of a pipeline tracing system in accordance with an embodiment of the present invention;

FIG. 2 shows a schematic cross-sectional view of the trace line profile of the pipeline shown in FIG. 1; and

figure 3 shows an enlarged partial view of the trace line of the pipeline shown in figure 2.

Detailed Description

The features and technical effects of the technical solutions of the present invention are described in detail below with reference to the accompanying drawings and with reference to exemplary embodiments, which disclose a pipeline tracing system capable of effectively monitoring and maintaining the on/off of a tracing line in real time. It is noted that like reference numerals refer to like structures and that the terms "first", "second", "upper", "lower", and the like as used herein may be used to modify various structures. These modifications do not imply a spatial, sequential, or hierarchical relationship to the structures being modified unless specifically stated.

As shown in fig. 1, the pipe tracing system according to the preferred embodiment includes a pipe tracing line 2 installed around each of a plurality of pipes 1, and at least one inspection pile 3 distributed among the plurality of pipes. The test piles 3 comprise a body portion 3c buried between the network of pipes 1 (not limited to between adjacent pipes 1 as shown in fig. 1, but may be individually disposed around a single pipe 1 at intervals of, for example, 200 to 500 meters), and communication links 3a or 3b extending from the body portion 3c to the tracer wires 2 of the surrounding pipes 1, respectively.

The main body portion 3c includes at least one detection signal transmission mechanism such as a signal generator for transmitting an alternating current signal with a preset parameter (e.g., amplitude and/or phase) to the trace line 2 so that the trace line 2 generates an electromagnetic field, whereby the buried position of the pipeline can be determined by detecting the magnetic field generated by the trace line 2 under the ground using a magnetic field detector on the ground, facilitating the construction of the signal generator.

The communication links 3a and 3b include communication links for transmitting the preset alternating current signal, which may be wires or cables in a wired communication manner, wireless communication links conforming to communication protocols such as bluetooth, Radio Frequency (RF), WiFi, Wi-Max, and the like, or a combination of the wired communication links and the wireless communication links. Preferably, the communication link 3a and/or 3b comprises at least one wired power transmission module, such as a power supply voltage line or a power supply rail (not shown), transmitting in a wired manner a first power supply Voltage (VDD) or a second power supply Voltage (VSS) to the power supply line within the trace line 2. Further, the communication link 3a and/or 3b may also comprise at least one wireless power transmission module (e.g. an RF transmission coil, not shown) for wirelessly transmitting power pulses to a receiving module (e.g. an RF receiving coil, not shown) within the trace line 2, so that a high voltage pulse signal is generated on the power line within the trace line 2.

Preferably, the main body part 3c further comprises at least one detection signal receiving mechanism, such as a signal receiver (not shown), for receiving feedback data from the tracer wires 2 of the adjacent pipes 1, and judging locally by means of a processor (not shown) added at the main body part 3c or remotely by means of a server (not shown) connected through a network, for example, whether the tracer wires 2 are disconnected, failed, etc., and issuing an alarm if a failure occurs, prompting an administrator to repair in time. Advantageously, the processor at the body portion 3c or a remote server issues an alarm, while the body portion 3c is instructed to report the current location, number or geographical information, such as latitude and longitude, burial depth, etc., to facilitate the quick location of the fault point by the service personnel. From this, can monitor effectively in real time and maintain the break-make of pipeline tracer line to effectively guarantee pipeline engineering's quality and progress, and check the condition of laying of tracer line fast and accept, realize automated management.

As shown in fig. 2, a pipeline tracer line 2 according to the preferred embodiment is installed around a pipeline 1. The pipe 1 is, for example, a gas pipe, a tap water pipe network, or a cable for other communication networks. The wall of the pipe 1 is made of PE material, typically a medium density PE (mdpe) or high density PE (hdpe) material in order to improve structural strength. The cross section of the pipeline 1 may be in other shapes such as ellipse, hexagon, octagon, etc. besides the circle shown in fig. 2, as long as it meets the requirements of burying and managing operation in pipeline engineering construction. In order to track the buried PE pipe 1, one or more tracer lines 2 are laid around the pipe 1 (in the direction of extension of the pipe 1) in parallel, for example symmetrically on the left and right sides or on the top and bottom sides, or may be distributed equiangularly/equidistantly around the pipe 1 in a number of 3, 4, 6, 8, etc. The trace line 2 has an exposed point at a valve or the like of the pipeline 1 (for example, at the connection with the communication links 3a, 3b, not shown in detail), and an ac signal with preset parameters (for example, amplitude and/or phase) can be transmitted to the trace line 2 via a signal generator, so that the trace line 2 generates an electromagnetic field, whereby the buried position of the pipeline can be determined by detecting the magnetic field generated by the trace line 2 at the ground surface using a magnetic field detector, which facilitates construction.

As shown in fig. 3, a partial enlarged view of the trace line 2 shown in fig. 2 according to a preferred embodiment. The trace line 2 includes a power supply line 2a/2b, an elastic body 2c at the center, a plurality of signal lines 2d uniformly distributed around the elastic body 2c, a first spacer 2e between adjacent signal lines, a second spacer 2f between the power supply line and the signal lines, and a filling layer 2 g.

The power supply line is used to receive a supply voltage from the main body portion 3c through a power transmission module included in the communication link 3a, 3 b. The power supply lines comprise at least a first power supply line 2a and a second power supply line 2b, which are arranged on the surface, e.g. opposite ends, of the tracer line, wherein one of the first power supply line 2a and the second power supply line 2b corresponds to the position of fig. 1, in which the tracer line 2 is in contact with the outer wall of the pipeline 1, and the other corresponds to the position of fig. 1, in which the tracer line 2 is remote from the outer wall of the pipeline 1. The power supply line 2a/2b is made of a non-magnetically conductive metal material, such as copper, aluminum or stainless steel. Wherein, select for use copper can reduce parasitic resistance, reduce the consumption, select for use stainless steel then can strengthen power cord self tensile strength and further strengthen the mechanical strength of tracer line, and select for use aluminium then can trade-off between the above-mentioned advantage of copper and stainless steel. The outer wall of the power cord is preferably coated with an insulating layer (not shown) such as PE, PVC (polyvinyl chloride), ABS (acrylonitrile butadiene styrene terpolymer), PET (polyethylene terephthalate), PEN (polyethylene naphthalate) or the like, preferably PE material to enhance the bond strength with the surrounding material, particularly the pipe 1. The first power supply line 2a applies, for example, a first power supply VDD, and the second power supply line 2b applies, for example, a second power supply VSS.

The elastic modulus of the elastomer 2c is smaller than that of its surrounding adjacent material, and may be, for example, Low Density Pe (LDPE), ultra low density pe (lldpe), metallocene LDPE, bimodal LDPE, etc., and may also be other materials such as elastomers, cellular materials. The elastic body 2c is arranged at the central position of the trace line 2 and is used for relieving centripetal pressure, shearing stress and the like of surrounding members and preventing the trace line from being accidentally broken due to external mechanical force in the construction process.

The signal line 2d is used to receive the detection signal through the communication links 3a, 3 b. The plurality of signal lines 2d are evenly and/or symmetrically distributed around the elastic body, and the number thereof may be 4, 8, 10, 12, etc., in addition to six as shown in fig. 2. The signal wires 2d are copper-core cables, the cross-sectional area of the central copper strand of which is, for example, 1.5 to 2.5 square millimeters, and each cable can be ensured to withstand a detection current of up to 300 mA. In order to reduce the loop resistance, the surface of the copper core may further include a pressed or plated noble metal layer (not shown), such as Au, Ag, Pt, etc., for reducing the influence of excessive surface current density due to skin effect. The surface of the copper-core cable is also coated with an insulating layer, such as PVC, ABS, PET, PEN, etc., and preferably the melting point of this insulating layer is higher than the material (PE) of the pipe 1, the first spacer 2 e.

Between adjacent signal lines 2d there is also a first spacer 2e of a material having a higher hardness than the surrounding filling layer 2g, preferably a higher hardness than the insulating layer at the surface of the signal line 2d, and optimally also a higher hardness than the copper core of the signal line 2d, for enhancing the mechanical strength of the entire trace line 2, e.g. for improving the resistance to stretching. The material of the first spacer 2e may be an insulating material such as PVC, ABS, which has a higher hardness and a higher melting point than those of the second spacer 2f, a metal material such as stainless steel (and further preferably a stainless steel material which is not magnetically conductive, for example, 202, 304, or 316 stainless steel) which has a higher hardness than copper, or the above metal material which is wrapped with the above insulating material. The sectional shape of the first spacer 2e is not limited to the triangular shape shown in the drawing, and may be a trapezoid, a sector, an ellipse, or the like.

And the second spacer 2f between the signal wire 2d and the power wire 2a/2b is made of the same PE material as the outer wall of the pipe 1, so as to improve the bonding strength in the subsequent installation process. The filler layer 2g is made of a material having a hardness of less than or equal to that of the first and second spacers, such as LDPE, LLDPE, metallocene LDPE, bimodal LDPE, so as to effectively relieve stress between adjacent members.

During the installation process of the trace 2, the corresponding position of the first power line 2a is attached to the outer wall (for example, the left and right sides) of the pipeline 1, a short high voltage VDD (for example, 380V or 600V) voltage pulse is applied to the first power line 2a, heat is generated on the first power line 2a, and the second spacer 2f (further, the filling layer 2g) around the first power line 2a is at least partially melted, so that the second spacer 2f made of PE material is melted with the outer wall of the pipeline 1 to improve the installation strength of the trace and avoid inaccurate tracing caused by later displacement, and the melting point of the insulating layer of the signal line 2d nearby the second spacer is higher than that of the PE material and cannot be melted so as to not affect the insulating and isolating effect of the signal line. In the process and the subsequent signal detection process, the power line and the signal line are made of non-magnetic metal materials, so that the distribution of the generated magnetic field is not influenced, and the influence on the detection precision is effectively avoided.

While the invention has been described with reference to one or more exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the disclosure without departing from the scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the disclosed system architecture and method of manufacture will include all embodiments falling within the scope of the invention.

Claims

1. A tracer system for applying an alternating current signal to tracer lines to generate a magnetic field to facilitate detection of the position of a pipeline, the tracer system comprising at least one tracer line mounted around each of a plurality of pipelines and at least one detector pile embedded between a network of said plurality of pipelines, the tracer system comprising: the test stake includes a body portion and at least one communication link for at least sending an alternating current signal to the trace line and a supply voltage to the trace line.

2. Tracer system according to claim 1, characterised in that the transmission of the alternating signal and/or of the supply voltage is carried out by wired and/or wireless means.

3. The tracer system of claim 1, wherein the body portion further comprises a signal receiver for receiving feedback data from the tracer line.

4. The tracing system of claim 1, wherein the trace line includes:

the elastic body is positioned in the center of the tracing line;

and the filling layer is filled in the tracing lines.

5. The tracer system of claim 4, wherein the conduit and the plurality of second spacers are formed from a PE material.

6. The tracer system of claim 4, wherein the elastic modulus of the elastomer is less than the elastic modulus of other structures of the tracer line.

7. The tracing system of claim 4, wherein said plurality of power lines and said plurality of signal lines are made of a non-magnetically conductive metallic material.