KR102320666B1 - System and method for relieving ac voltage of underground buried piping - Google Patents

Abstract

Disclosed is a system for resolving AC voltage of an underground buried pipe, including; a mesh network structure installed in an underground buried space of a buried pipe.

Description

A system and method for relieving AC voltage in underground pipelines

The present invention relates to a system and method for relieving AC voltage in underground pipelines, and more particularly, to underground pipelines for resolving AC voltage inflow into metal pipelines such as gas pipelines, water supply pipelines, and oil pipelines buried underground. It relates to an AC voltage relief system and method.

As the demand for energy such as electricity, gas, and hazardous materials increases due to industrialization, the number of sections in which metal pipes such as gas, oil pipelines, and water supply pipes buried underground parallel or intersect with power lines are increasing.

Accordingly, AC current is applied to the pipe by the power line, or AC current caused by lightning or a ground fault of the high-voltage line flows into the pipe to damage the pipe.

Currently, grounding, etc., is applied to ground fault currents, fault currents, and induced currents through grounding to ground pipes and structures. However, in the case of underground pipes, electrical current is leaked to the grounding facility and corrosion occurs.

In order to solve this problem, a method for installing a power line and an underground buried pipe to be spaced apart has been proposed, but it is difficult to be applied to a dense facility of underground buried pipe, such as a petrochemical complex.

One aspect of the present invention discloses a system for resolving AC voltage in underground buried piping that eliminates the inflow of AC voltage discharged from the above-ground piping to the buried piping by a flange protection guard, including a mesh network structure installed in the underground buried space of the buried piping. do.

Another aspect of the present invention discloses an AC voltage relief system for establishing a remote monitoring environment using an AC voltage between a mesh network structure and a buried pipe obtained through a flange protection guard.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

The system for resolving AC voltage of an underground pipe according to an embodiment of the present invention includes a mesh network structure installed in an underground space of the buried pipe.

On the other hand, the mesh network structure is formed of a mesh structure in which iron wires made of copper are formed into a grid, and a pair of copper mesh networks are provided to overlap the bottom surface of the underground buried space in two rows; a bus bar electrically connected to and installed on the overlapping portion of the pair of copper mesh networks overlapped in two rows; and a mesh network lead wire provided to be drawn out from the bus bar;

The mesh network lead wire is connected to the (-) terminal, the lead wire drawn out from the buried pipe side is connected to the (+) terminal, flange protection guard for measuring the AC voltage discharged from the copper mesh network to the buried pipe side; a communication unit having a built-in communication modem connectable to the network and provided to obtain AC voltage measurement data measured by the flange protection guard; and a terminal in which an AC voltage monitoring application is mounted and executed, and receives the AC voltage measurement data at a predetermined period from the communication unit through the AC voltage monitoring application,

The terminal receives the AC voltage measurement data every predetermined period from the communication unit by executing the AC voltage monitoring application, compares the AC voltage measurement data with a reference voltage, and the AC voltage measurement data is less than or equal to the reference voltage case, record the AC voltage measurement data, and when the AC voltage measurement data exceeds the reference voltage, generate an alarm requesting inspection of the buried pipe and then record the AC voltage measurement data,

The flange protection guard is provided in the form of a box, the (+) terminal and the (-) terminal are provided on one side, the body portion having a memory chip for measuring the AC voltage therein; and a support part for supporting the body part at a predetermined height.

On the other hand, the flange protection guard is installed so as to be detachably attached to the upper side of the main body, is provided in a cylindrical shape, the display portion is provided with a flashing light at the end; and an installation part for installing the display part on the body part;

The installation part is provided in a cylindrical shape having an opening for insertion of the display part on the upper side, a seating space for supporting the lower end of the display part is formed on a bottom surface, and an installation bracket provided inward from the upper surface of the main body part ; A through hole for inserting the display unit is formed in the center, and an upper side of the mounting bracket is rotationally coupled to the lower end of the through hole to communicate with the inner space of the mounting bracket, and a thread is formed on the lower outer circumferential surface to form an upper surface of the main body an installation block rotatably coupled to an installation hole formed in the; and a plurality of protrusions provided in a through hole penetrating the central portion of the installation block, made of a material having elastic force, protruding from an inner circumferential surface at equal intervals, and pressing the outer circumferential surface of the display unit inserted into the through hole Including;

The flange protection guard is installed horizontally in the ground so that the support parts provided in a pair spaced apart from each other by a predetermined distance can be interconnected, the longitudinal section is provided in a 'C' shape, and a pair of the support parts are mutually connected on one side. It further comprises;

The connecting part includes a sliding part coupled to the other open side so as to be slidably movable;

The sliding part is provided in the form of a bar of a predetermined thickness, and the upper and lower portions are respectively coupled to sliding grooves formed at the upper and lower ends of the other side of the connection part so as to be slidably moved, and the sliding grooves are formed by the operator's operation. a sliding bar sliding along the longitudinal direction of the connection part; and a foreign substance that is formed extending from the sliding bar and is located in the inner space of the connecting unit through the other open side of the connecting unit, and when the sliding bar slides in the longitudinal direction of the connecting unit, foreign substances introduced into the inner space of the sliding bar It may include a; push the panel in the sliding movement direction, and forming a plurality of through-holes at the lower end.

According to one aspect of the present invention described above, by installing the mesh network structure buried in the underground buried space, it is possible to prevent damage to the buried pipe, human accidents, etc. as the AC voltage flowing into the buried pipe is resolved.

In addition, according to another aspect of the present invention, by periodically monitoring the AC voltage between the mesh network structure and the buried pipe, it is possible to prevent problems due to AC voltage inflow into the buried pipe in advance.

1 is a conceptual diagram of an AC voltage relieving system for underground pipelines according to an embodiment of the present invention.
2 is a flowchart of a method for resolving AC voltage of an underground pipe buried in the terminal shown in FIG. 1 .
FIG. 3 is a view showing in detail the mesh network structure shown in FIG. 1 .
4 is a view showing in detail the flange protection guard shown in FIG.
5 is a view showing an actual application example of the AC voltage relieving system for underground pipelines according to an embodiment of the present invention.
6 is a view showing a flange protection guard according to another embodiment of the present invention.
FIG. 7 is an enlarged view of part A of FIG. 6 .

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. As used herein, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprises” and/or “comprising” refers to the stated elements, steps, and acts do not exclude the presence or addition of one or more other elements, steps and acts.

1 is a conceptual diagram of an AC voltage relieving system for underground pipelines according to an embodiment of the present invention.

Referring to FIG. 1 , the AC voltage relieving system 1000 of an underground buried pipe according to an embodiment of the present invention includes a mesh network structure 100 , a flange protection guard 200 , a communication unit 300 , and a terminal 500 . may include

The AC voltage relieving system 1000 of an underground buried pipe according to an embodiment of the present invention reduces the AC voltage inflow into the buried pipe through the mesh network structure 100 installed in the underground buried space of the buried pipe, Establish a remote monitoring environment of the AC voltage between the mesh network structure 100 and the buried pipe.

The mesh network structure 100 is a mesh-type grounding plate structure, which is installed in an underground buried space so that a ground fault current, a fault current, an induced current, etc. are discharged from the ground pipe to the underground.

Ground pipes or structures distribute AC currents such as ground fault currents, fault currents, and induced currents to the ground by grounding, etc., and these AC currents are likely to flow into the buried pipes and damage the buried pipes. The mesh network structure 100 may serve as a grounding resistance for the AC current distribution to the ground to solve the AC current inflow into the buried pipe.

The flange protection guard 200 may be PCR (Polarization Cell Replacement) applied, and may measure the AC voltage between the mesh network structure 100 and the buried pipe.

PCR is a device applied to cathodic protection structures such as piping, tanks, grounding systems and cable casings, providing DC decoupling and AC continuity/grounding simultaneously. For example, the PCR may be installed on an insulating flange, which is a connection part of an above-ground pipe and a buried pipe, to discharge AC current flowing into the above-ground pipe to the buried pipe. In this case, the lead wire drawn out from the ground pipe side will be connected to the (-) terminal of the PCR, and the lead wire drawn from the buried pipe side will be connected to the (+) terminal of the PCR.

In this embodiment, the flange protection guard 200 has a lead wire drawn out from the mesh network structure 100 is connected to a (-) terminal, and a lead wire drawn from the buried pipe side is connected to a (+) terminal, a mesh network structure It is possible to measure the AC voltage discharged from (100) to the side of the buried pipe.

The communication unit 300 may have a built-in communication modem connectable to the network, and may be embedded in the flange protection guard 200 , or may be provided adjacent to the flange protection guard 200 .

The communication unit 300 may acquire AC voltage measurement data between the mesh network structure 100 and the buried pipe measured by the flange protection guard 200 and transmit it to the terminal 500 to be described later.

The communication unit 300 may transmit AC voltage measurement data to the terminal 500 according to a predetermined period. For example, the communication unit 300 may transmit the AC voltage measurement data to the terminal 500 at an interval of one hour.

The terminal 500 is a device capable of communication and input/output of information, and may be applied to, for example, a desktop PC, a laptop PC, a tablet PC, a smart phone, etc., and may be a device used by a maintenance manager of a buried pipe .

The terminal 500 may be loaded and executed with the AC voltage monitoring application according to an embodiment of the present invention. The AC voltage monitoring application according to an embodiment of the present invention provides a monitoring service of AC voltage measurement data received from the communication unit 300 . In this regard, it will be described with reference to FIG. 2 .

2 is a flowchart of a method for resolving AC voltage of an underground pipe buried in the terminal shown in FIG. 1 .

Referring to FIG. 2 , the terminal 500 may receive voltage data at both ends of the flange protection guard 200 at predetermined intervals through the communication unit 300 ( S510 ).

For example, the terminal 500 may receive the voltage data at both ends of the flange protection guard 200 through the communication unit 300 at a period of one hour, where the voltage data at both ends of the flange protection guard 200 is a mesh network structure It corresponds to the AC voltage between (100) and the buried pipe.

The terminal 500 may compare and analyze the voltage at both ends of the flange protection guard 200 with the reference voltage (S520).

For example, when the voltage at both ends of the flange protection guard 200 is 5V or less, the terminal 500 may determine that the AC voltage inflow into the buried pipe is resolved. When the voltage at both ends of the flange protection guard 200 exceeds 5V, the terminal 500 may determine that the AC voltage is excessively introduced into the buried pipe.

When the voltage across the flange protection guard 200 is 5V or less (S520), the terminal 500 may input the current time and voltage data across the flange protection guard 200 in the result report (S540).

Here, the result report may be a file in the form of a document in which the voltage data at both ends of the flange protection guard 200 for each time period is input, and is output to be read according to the user's request.

When the voltage at both ends of the flange protection guard 200 exceeds 5V (S520), the terminal 500 generates an alarm requesting the inspection of the buried pipe (S530), the current time and the flange protection guard 200 in the result report ) can be inputted to both ends of the voltage data (S540).

For example, the alarm may be output to the terminal 500 in the form of a pop-up message or a predetermined alarm sound may be output.

The user can monitor the AC voltage flowing into the buried pipe by running the application through the terminal 500 and reading the result report as needed, and when an alarm occurs, check the buried pipe to prevent a safety accident in advance can do.

FIG. 3 is a view showing in detail the mesh network structure shown in FIG. 1 .

Referring to FIG. 3 , the mesh network structure 100 may be installed in an underground buried space 10 in which metal pipes such as a gas pipe, a water supply pipe, and an oil pipe are buried. In this embodiment, the underground buried space 10 may be formed by excavating to a width of 1 m and a depth of 1 m.

The mesh network structure 100 may include a copper mesh network 110 , a bus bar 120 , and a mesh network lead wire 130 .

The copper mesh network 110 is a mesh structure in which a copper wire is formed into a grid, and may be applied to, for example, a size of 0.5m(W) X 20m(L) X 0.5mm(T).

A pair of copper mesh networks 110 may be provided, and may be installed to overlap in two rows on the bottom surface of the underground buried space 10 . At this time, the copper mesh network 110 is preferably installed on the bottom surface of the underground buried space 10 in a state where Coke Breeze (C: 90% or more) is installed 5 cm or more on the bottom surface of the underground buried space 10 . . In addition, it is preferable that Coke Breeze (C: 90% or more) is laid on the upper portion of the overlapping copper mesh network 110 by 5 cm or more. This is to lower the ground resistance of the copper mesh network 110 .

The bus bar 120 may be applied as a ground bus bar made of copper, and may be electrically connected and installed in the overlapping portion of the pair of copper mesh networks 110 overlapped in two rows. For example, the bus bar 120 may be electrically connected to the overlapping portion of the pair of copper mesh networks 110 through bolts.

The mesh network lead wire 130 may be applied as a lead cable of TFR CV 1C-10mmSQ, and may be connected to be drawn out from the busbar 120 . For example, the mesh network lead wire 130 may be electrically connected to the bus bar 120 through a bolt using CAD welding or a cable terminal.

Here, solid epoxy may be installed in the connection portion between the copper mesh network 110 , the bus bar 120 , and the mesh network lead wire 130 . This is to prevent corrosion between dissimilar metals.

4 is a view showing in detail the flange protection guard shown in FIG.

Referring to FIG. 4 , the flange protection guard 200 may include a body part 210 and a support part 220 .

The main body 210 may be provided in a box shape, and a memory chip for performing the role of PCR may be mounted therein. In addition, the main body 210 may incorporate the above-described communication unit 300 .

The main body 210 may have a (+) terminal and a (-) terminal on one side, and may generate data obtained by measuring the voltages at both ends.

In this embodiment, the (+) terminal of the main body 210 may be connected to the buried pipe lead wire 30 drawn out from the buried pipe, and the mesh network lead wire 130 may be connected to the (-) terminal.

Here, the buried pipe lead wire 30 may be drawn out from the exposed portion of the buried pipe or an electric potential measuring box installed in the buried pipe. Alternatively, the buried pipe lead wire 30 may be drawn out separately from the buried pipe. In this case, a reference electrode for measuring AC voltage may be installed.

The support part 220 may support the body part 210 at a predetermined height at a predetermined installation position.

5 is a view showing an actual application example of the AC voltage relieving system for underground pipelines according to an embodiment of the present invention.

Referring to FIG. 5 , an underground buried space 10 for installing a buried pipe may be excavated (①), and the mesh network structure 100 may be installed in the underground buried space 10 (② to ⑧).

At this time, Coke Breeze (C: 90% or more) of 5 cm or more may be laid on the upper and lower portions of the mesh network structure 100 (③~⑤).

The flange protection guard 200 may be installed on the ground adjacent to the underground buried space 10, the (+) terminal is connected to the buried pipe lead wire 30 drawn out from the buried pipe, and the (-) terminal is a mesh network lead wire. 130 can be connected (⑨).

The operator may measure the voltage at both ends of the flange protection guard 200 in order to determine whether to additionally install the mesh network structure 100 (⑩ to ⑫). For example, the operator may additionally install the mesh network structure 100 in the same manner until the voltage at both ends of the flange protection guard 200 is measured to be 5V or less.

In addition, the operator may check whether the AC voltage measurement data from the flange protection guard 200 is received in the terminal 500 according to a preset period.

As described above, the AC voltage relieving system 1000 of an underground buried pipe according to an embodiment of the present invention is installed by embedding the mesh network structure 100 in the underground buried space 10 to solve the AC voltage flowing into the buried pipe. Accordingly, it is possible to prevent damage to the buried pipe, human accidents, etc., and also, by periodically monitoring the AC voltage between the mesh network structure 100 and the buried pipe, it is possible to prevent problems caused by AC voltage inflow into the buried pipe in advance. have.

On the other hand, the flange protection guard 200 according to another embodiment of the present invention is provided detachably on the upper side of the main body 210 in addition to the configuration of the main body 210 and the support 220 shown in FIG. It may further include a display unit. In this regard, it will be described with reference to FIG. 6 .

6 is a view showing a flange protection guard according to another embodiment of the present invention.

Referring to FIG. 6 , the flange protection guard 200 according to another embodiment of the present invention may include a body part 210 , support parts 221 and 222 , and a display part 250 .

The description of the body portion 210 and the support portions 221 and 222 is replaced with the above-described ones.

The display unit 250 may be provided in a cylindrical shape, and may be installed detachably on the upper side of the main body 210 .

A flashing light is installed at the end of the display unit 250 so that the operator can easily check the position of the body unit 210 even at night or in bad weather.

The main body 210 may include an installation unit 230 for installing the display unit 250 . The installation part 230 may be provided on the upper surface of the body part 210 , and the display part 250 may be inserted and installed. In this case, the installation part 230 is provided so that the internal space of the body part 210 can be kept sealed even when the display part 250 is inserted.

The installation unit 230 may include an installation bracket 231 , an installation block 233 , and a gripping unit 235 .

The installation bracket 231 may be provided in a cylindrical shape having an opening for insertion of the display unit 250 on the upper side, and a seating space 232 for supporting the lower end of the display unit 250 may be formed on the bottom surface. . For example, the seating space 232 may be applied as a bearing.

The installation bracket 231 may be provided inwardly from the upper surface of the main body 210 .

The installation block 233 may have a through hole for insertion of the display unit 250 formed in the center thereof, and the upper side of the installation bracket 231 is rotationally coupled to the lower end of the through hole, and communicates with the internal space of the installation bracket 231 . can be

A screw thread may be formed on the lower outer peripheral surface of the installation block 233 , and the lower portion may be rotatably coupled to an installation hole formed in the upper surface of the main body 210 .

The gripper 235 may be provided in a through hole penetrating the center of the installation block 233 .

The grip part 235 may be made of a material having an elastic force, and may include protrusions 234 protruding from the inner circumferential surface at equal intervals. These protrusions 234 press and fix the outer circumferential surface of the display unit 250 inserted into the gripper 235 , thereby preventing foreign substances from being introduced from the outside.

Meanwhile, FIG. 7 is an enlarged view of part A of FIG. 6 .

Referring to FIG. 7 , the flange protection guard 200 according to another embodiment of the present invention includes the body part 210 , the support part 220 , the display part 250 and the installation part 230 shown in FIG. 6 . In addition, it may further include a connection unit 240 .

The connection part 240 may be provided to interconnect the pair of support parts 221 and 222 at the lower end of the pair of support parts 221 and 222 as shown in FIG. 6 . The connection part 240 can stably support the support part 220 by being horizontally installed in the ground.

The connection part 240 may be provided in a 'C' shape in its longitudinal cross-section, and a pair of support parts 220 on one side may be installed and coupled through a screw or the like in a state in which they are spaced apart from each other.

The connection part 240 may include a sliding part 260 on the other open side. The sliding part 260 removes foreign substances such as soil flowing into the other open side of the connection part 240 , thereby facilitating the removal or maintenance of the flange protection guard 200 .

The sliding unit 260 may include a sliding bar 261 and a push panel 262 .

The sliding bar 261 may be provided in the form of a bar having a predetermined thickness, and the upper and lower portions of the sliding grooves 241a and 242a are formed in the upper end 241 and the lower end 242 of the other side of the connecting portion 240, respectively. can be coupled to

The sliding bar 261 may slide along the sliding grooves 241a and 242a in the longitudinal direction of the connection part 240 by an operator's manipulation.

The push panel 262 may extend from the sliding bar 261 and be positioned in the inner space of the connection part 240 . When the sliding bar 261 slides in the longitudinal direction of the connection part 240 , the push panel 262 may push foreign substances flowing into the inner space of the connection part 240 in the moving direction. The push panel 262 may have a plurality of through-holes 263 formed at the lower end thereof. The plurality of through-holes 263 pass a part of foreign substances in the movement path of the push panel 262 through the push panel 262 . This makes it easy to move around.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can realize that the present invention can be embodied in other specific forms without changing its technical spirit or essential features. you will be able to understand Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

1000: AC voltage relief system for underground pipelines
100: mesh network structure
200: flange protection guard
300: communication department
500: terminal

Claims (2)

Including; a mesh network structure installed in the underground space of the buried pipe;
The mesh network structure,
a copper mesh network formed in a mesh structure formed of copper wire in a grid, provided in pairs, and installed to be overlapped in two rows on the bottom surface of the underground buried space;
a bus bar electrically connected to and installed on the overlapping portion of the pair of copper mesh networks overlapped in two rows; and
Including; mesh network lead wire provided to be drawn out from the bus bar;
The mesh network lead wire is connected to the (-) terminal, the lead wire drawn out from the buried pipe side is connected to the (+) terminal, flange protection guard for measuring the AC voltage discharged from the copper mesh network to the buried pipe side;
a communication unit having a built-in communication modem connectable to the network and provided to obtain AC voltage measurement data measured by the flange protection guard; and
A terminal having an AC voltage monitoring application installed and executed, and receiving the AC voltage measurement data at a predetermined period from the communication unit through the AC voltage monitoring application;
The terminal is
Execute the AC voltage monitoring application to receive the AC voltage measurement data at a predetermined period from the communication unit, compare the AC voltage measurement data with a reference voltage, and when the AC voltage measurement data is less than or equal to the reference voltage, the AC voltage measurement data Record the voltage measurement data, and when the AC voltage measurement data exceeds the reference voltage, generate an alarm requesting inspection of the buried pipe and then record the AC voltage measurement data,
The flange protection guard,
a body part provided in a box shape, having the (+) terminal and the (-) terminal on one side, and mounting a memory chip for measuring the AC voltage therein; and
a support part for supporting the body part at a predetermined height;
a display unit that is detachably installed on the upper side of the main body, is provided in a cylindrical shape, and has a flashing light at the end; and
Including, an AC voltage relieving system of an underground buried pipe;
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