KR20190133493A - Apparatus and method for fire extinguishing of underground power OF cable - Google Patents

Abstract

The present invention relates to a fire suppression system in an underground power system and a method thereof and, more specifically, to a fire suppression system discharging a hardening liquid to suppress fire in case of fire occuring at underground power oil-filled (OF) cable, and a method thereof. The fire suppression system of an underground power OF cable comprises: a sensing unit formed to sense heat or smoke of the OF cable; an inlet unit through which a hardening liquid is introduced; a stop valve extending to the end of the inlet unit and formed to control the flow of the hardening liquid; a pressure gauge unit connected to the stop valve and formed to check the pressure of the hardening liquid; a solenoid valve extending from the end of the pressure gauge unit and operating in conjunction with the sensing unit; and an ejection unit formed to eject the hardening liquid.

Description

Apparatus and method for fire extinguishing of underground power OF cable for underground transmission OF cable

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire suppression apparatus and a method thereof in an underground power transmission system, and more particularly, to a fire suppression apparatus and a method in which a reinforcing liquid is released to extinguish a fire in an oil-filled cable. .

The ultra-high voltage of 765 ~ 154kW generated by the power plant can be supplied to local substations through the transmission tower. However, in urban areas, the installation of transmission towers that undermine urban aesthetics and expose them to natural disasters is decreasing. Therefore, underground transmission system is provided with underground transmission system to achieve underground transmission line.

Underground power outlets cause fires in oil-filled (OF) cables due to various accidents, aging of parts, or natural disasters. Accordingly, there is a need to quickly extinguish a fire occurring in the underground transmission OF cable in order to prevent a large power accident.

Therefore, the underground power transmission system is equipped with a reinforcing liquid extinguishing system for extinguishing the fire generated in the underground power OF cable. Reinforcement liquid In the extinguishing system, the reinforcement liquid is used as the extinguishing liquid, and the reinforcing liquid can be released automatically by detecting the heat or smoke generated by the fire by enclosing compressed gas (nitrogen, etc.) which is the source of the extinguishing liquid. Construct fire extinguishing equipment.

Conventional reinforcement liquid fire extinguishing equipment includes an F-type valve driven by a solenoid valve. In detail, the F-type valve is formed to fill the drug stored in the container at a pressure of 10 kgf / cm 2 so that the solenoid valve perforated pin perforates the sealing film inside the fire signal by the fire signal to release the drug to the flower source.

On the other hand, there is a problem that the F-type valve is not always separated inspection. In addition, the vibrator, which is an important accessory of the F-type valve, may be entangled inside by chemical reaction with the reinforcing liquid, so that a malfunction of the reinforcing liquid may not occur even during normal solenoid starting by a fire. Furthermore, since the F-type valve is perforated with the sealing film, the reinforcing liquid is discharged, and thus, the F-type valve is operated to replace the F-type valve when it is operated as a one-time component that cannot be reused when a normal operation or a malfunction occurs.

Accordingly, the present invention provides a fire suppression apparatus and method for underground transmission OF cable that can improve the above problems.

One object of the present invention is to propose a fire suppression apparatus and method for underground transmission OF cable that can be separated and inspected at any time of the underground transmission system.

Another object of the present invention is to propose a fire suppression apparatus and method for underground transmission OF cable to improve the reliability of the reinforcement liquid discharge in the event of a fire by excluding the F-type valve having a vibrator that is narrowed by the chemical reaction with the reinforcement liquid .

It is another object of the present invention to propose a fire suppression apparatus and method for underground transmission OF cable, which is capable of a quick replacement process in case of accessory failure by excluding a non-reusable one-time component.

Fire suppression apparatus of the underground power OF cable according to the present invention is provided in the underground power transmission system, the sensing unit is formed to detect the heat or smoke of the OF cable, the inlet to which the reinforcing liquid is introduced, is provided extending to the end of the inlet , A stop valve formed to control the flow of the reinforcement liquid, a pressure gauge portion connected to the stop valve to extend the end of the pressure gauge portion formed to check the pressure of the reinforcement liquid, and a solenoid valve that works in conjunction with the detection unit and reinforcement It characterized in that it comprises a jet unit which is formed to eject the liquid.

In one embodiment, the stop valve is characterized in that it is formed to turn on and off the reinforcement liquid to the pressure gauge.

In one embodiment, the stop valve is characterized in that the ball valve.

In one embodiment, the sensing unit detects heat or smoke generated from the OF cable, when the heat or smoke is detected in the sensing unit is characterized in that the solenoid valve is opened to deliver the electrical signal to the solenoid valve do.

In one embodiment, it is characterized in that formed by the opening of the solenoid valve to flow the reinforcement liquid to the ejecting portion.

In one embodiment, it characterized in that it further comprises a direction changing portion formed to change the flow direction of the reinforcing liquid between the distal end portion and the ejection portion of the solenoid valve.

In addition, in the fire suppression method of the underground transmission OF cable according to the present invention, the step of detecting heat or smoke generated from the underground transmission OF cable, the step of checking the pressure of the reinforcement liquid in the pressure gauge, the stop valve And checking the opening and opening the valve and opening the solenoid valve by transmitting an electrical signal to the solenoid valve, characterized in that the reinforcing liquid is ejected to the jetting unit according to the step.

The fire suppression apparatus and method of the underground transmission OF cable according to the present invention is provided with a stop valve formed to cut off the reinforcement liquid at the time of the underground inspection of the underground transmission system. It can be done efficiently.

In addition, the fire suppression apparatus and method of the underground transmission OF cable according to the present invention can eliminate the F-type valve having a vibrator that is squeezed by the chemical reaction with the reinforcement liquid can be improved reliability of the reinforcement liquid discharge in the event of a fire.

In addition, the fire suppression apparatus and method of the underground transmission OF cable according to the present invention by disposing a non-reusable one-time parts, it is possible to quickly replace the process when the accessory failure, it is possible to reduce the cost of replacement.

1 is a conceptual diagram of a fire suppression apparatus for an underground transmission OF cable according to an embodiment of the present invention.
2 is a conceptual diagram of a fire suppression apparatus of the conventional underground power OF cable.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, and the same or similar components are denoted by the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. In addition, in describing the embodiments disclosed herein, when it is determined that the detailed description of the related known technology may obscure the gist of the embodiments disclosed herein, the detailed description thereof will be omitted. In addition, the accompanying drawings are intended to facilitate understanding of the embodiments disclosed herein, but are not limited to the technical spirit disclosed herein by the accompanying drawings, all changes included in the spirit and scope of the present invention. It should be understood to include equivalents and substitutes.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "comprises" or "having" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

The fire suppression apparatus of the underground transmission OF cable may be provided in the underground transmission system. Underground power transmission system delivers electric power to local substations without damaging the aesthetics of urban areas in urban areas and by placing high voltage cables in underground power ports for safety reasons such as natural disasters. It is done.

For this reason, OF cables of single- or three-core type are used for high-capacity transmission from 66kV to 765kV. The OF cable has a distribution path inside the cable and is filled with low viscosity insulating oil so that a hydraulic pressure above atmospheric pressure is always applied to the cable by a pressure tank installed outside the cable. Therefore, since the voids are prevented from occurring due to the temperature change inside the cable and the temperature change in the external installation environment, the cable has a structure capable of preventing electrical deterioration.

However, OF cable is a material with excellent dielectric constant and electrical characteristics, and uses paper as primary insulation and maintains secondary insulation with insulating oil. On the other hand, the OF cable in the power port may cause a fire in the underground (OF) oil-filled cable due to natural disasters such as various accidents, aging of parts or lightning caused by the worker while maintaining the power port. Therefore, when a fire occurs, the paper and the insulating oil inside the OF cable may be expanded to a large fire. In case of fire of OF cable, property damage from large power outage may occur, so it is necessary to equip fire suppression device of underground cable OF cable.

2 is a conceptual diagram of a fire suppression apparatus 200 of the conventional underground transmission OF cable.

The fire suppression apparatus 200 of the conventional underground transmission OF cable is operated by the solenoid valve 230 and the F-type valve 231 including the perforated pin by the fire signal detecting the heat or smoke in the detection unit to strengthen the liquid Released. That is, the perforated pin of the solenoid valve 230 perforated the sealing film of the F-type valve by the fire signal, and the reinforcing liquid was discharged to the flower source. Accordingly, when the fire signal is sealed by the sealing film of the F-type valve, the reinforcement liquid is discharged through the inlet portion 210, the pressure gauge 220, the F-type valve 231 and the blower 240.

The fire suppression apparatus 200 of the conventional underground transmission OF cable is formed to check the pressure filling of the reinforcing liquid by attaching a pressure gauge 220 to the inlet 210 and the end extending. Accordingly, the inside of the F-type valve 231 extending from the pressure gauge 220 may contact the reinforcing liquid. Furthermore, a vibrator, which is an important accessory provided in the F-type valve 231, may be caught by chemical reaction with the reinforcing liquid. Occurrence of the reinforcement liquid during the start-up of the normal solenoid valve 230 due to the oscillator narrowing occurred.

In addition, the F-type valve 231 is not reusable after one time use due to sealing damage provided inside the F-type valve 231 due to the solenoid valve starting when a normal operation or a malfunction occurs.

In addition, the F-type valve 231 has a problem that it is difficult to determine whether or not the normal operation of the F-type valve 231 at the time of inspection because the separate inspection is impossible.

1 is a conceptual diagram of a fire suppression apparatus 100 of an underground transmission OF cable according to an embodiment of the present invention.

As an alternative to the conventional fire suppression apparatus 200 of the underground transmission OF cable, the fire suppression apparatus 100 and the method of the underground transmission OF cable according to the present invention can block the reinforcement liquid at the time of regular inspection of the underground transmission system. Since the stop valve 111 is formed so that the separate inspection for dismantling the fire suppression apparatus is possible, maintenance can be efficiently performed.

In addition, the fire suppression apparatus 100 and method of the underground transmission OF cable excludes an F-type valve having a vibrator that is squeezed by a chemical reaction with the reinforcement liquid, so that the reliability of the reinforcement liquid discharge may be improved in a fire accident.

In addition, the fire suppression apparatus 100 and method of the underground transmission OF cable by disposing a one-time non-reusable parts, it is possible to quickly replace the process when the accessory failure, it is possible to reduce the cost of replacement.

Fire suppression apparatus 100 of the underground transmission OF cable includes a detector (not shown), the inlet 110, the stop valve 111, the pressure gauge 120, the solenoid valve 130 and the blower 140 do.

The detector may be configured to detect heat or smoke of the OF cable. In the event of a fire, the stop valve 111 and the solenoid valve 130 are opened by the fire signal, and the reinforcement liquid used as the extinguishing agent is introduced into the inlet 110, the stop valve 111, the pressure gauge 120, and the solenoid valve. A flow passing through the 130 and the blower 140 may be formed and discharged to establish a fire pressure.

Inlet 110 is formed so that the reinforcing liquid may be introduced. The stop valve 111 is provided extending to the end of the inlet 110, it may be formed to control the flow of the reinforcing liquid. The stop valve 111 may be formed to turn on / off that the reinforcing liquid flows into the pressure gauge 120.

The stop valve 111 may include a glow valve, a gate valve, a needle valve, and a ball valve. The stop valve 111 is preferably formed of a ball valve that can be quickly opened and closed by rotating the handle at an angle of 90 degrees so that it can be easily closed at the time of regular inspection of the underground power transmission system. Thus, the pressure gauge 120 and the solenoid valve 130 can be easily checked.

The stop valve 111 may be formed to check the pressure filling of the reinforcing liquid in the pressure gauge 120 connected to the stop valve 111 when the fire detection waits.

On the other hand, when the underground transmission system is always checked, the stop valve 111 is closed to block the reinforcement liquid in the pressure gauge unit 120 and the solenoid valve 130, and the abnormality of the pressure gauge unit 120 and the solenoid valve 130 is observed. Separation checks may be possible to confirm.

The solenoid valve 130 is provided to extend at the end of the pressure gauge, it can operate in conjunction with the sensing unit. That is, when a fire signal such as detecting heat or smoke is detected by the detection unit, an electrical signal is transmitted to the solenoid valve 130 to open the solenoid valve 130, and the reinforcing liquid flows to the ejection unit 140, thereby providing a fire source. Can be released.

The fire suppression apparatus 100 of the underground transmission OF cable excludes an F-type valve having a vibrator that is squeezed by chemical reaction with the reinforcement liquid, and discharges the reinforcement liquid only by the operation of the solenoid valve 130. Therefore, the oscillator narrowing phenomenon of the F-type valve is excluded, so that the reinforcement liquid discharge reliability is increased and fire spreading can be prevented.

In addition, the direction change part 141 may be further included between the solenoid valve 130 end extension part and the jet part 140 to change the flow direction of the reinforcing liquid. The reinforcing liquid may be ejected to the flower garden by the direction changing unit 141.

Furthermore, in the fire suppression method of the underground transmission OF cable, the fire suppression apparatus 100 of the underground transmission OF cable at the time of fire detects a fire signal including heat or smoke generated from the underground transmission OF cable and the solenoid valve ( Transmitting an electrical signal to 130 to open the solenoid valve. According to the above steps, the reinforcing liquid may be ejected to the ejection unit 140 to suppress the fire.

When the fire is detected, since the pressure gauge 120 connected to the stop valve 111 is opened to check the pressure filling of the reinforcement liquid, the fire is not required to include the step of separately opening the stop valve 111. Suppression can be made.

However, when the check valve is closed at all times and the pressure gauge unit 120 and the solenoid valve 130 are checked, the reinforcement liquid is released even when the stop valve 111 is not opened due to an operator's mistake. The method may further include checking whether the stop valve 111 is opened and forming the stop valve 111 so as to be normally ejected.

Accordingly, the fire suppression apparatus 100 of the underground transmission OF cable in the event of fire detects a fire signal including heat or smoke generated from the underground transmission OF cable, checks whether the stop valve 111 is opened and stop valve ( And opening the solenoid valve by transmitting an electrical signal to the solenoid valve 130.

It will be apparent to those skilled in the art that the invention can be embodied in other specific forms without departing from the essential features of the invention.

In addition, the above detailed description should not be interpreted as limiting in all aspects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

100: fire suppression device for underground transmission OF cable
110: inlet 111: stop valve
120: pressure gauge 130: solenoid valve
140: blower 141: direction change unit
200: fire suppression apparatus of the conventional underground transmission OF cable
210: inlet 220: pressure gauge
230: solenoid valve 231: F-type valve
240: blowout

Claims (8)

In underground transmission system,
A detector configured to detect heat or smoke of the OF cable;
An inlet portion through which the reinforcing liquid is introduced;
A stop valve extending to the end of the inlet and configured to control the flow of the reinforcing liquid;
A pressure gauge connected to the stop valve and configured to check the pressure of the strengthening liquid;
A solenoid valve extending from the end of the pressure gauge and operating in conjunction with the sensing unit; And
Fire suppression apparatus of the underground transmission OF cable comprising a blowing unit is formed so that the reinforcing liquid is ejected. The method of claim 1,
The stop valve is a fire suppression apparatus of the underground transmission OF cable, characterized in that formed to turn on and off the reinforcement liquid flows into the pressure gauge. The method of claim 2,
The stop valve is a fire suppression apparatus of the underground transmission OF cable, characterized in that the ball valve. The method of claim 1,
The sensing unit detects heat or smoke generated from the OF cable,
When the heat or smoke is detected in the detection unit by transmitting an electrical signal to the solenoid valve, the solenoid valve is characterized in that the fire suppression apparatus of the underground transmission OF cable, characterized in that the opening. The method of claim 4, wherein
Fire suppression apparatus of the underground transmission OF cable, characterized in that formed by the opening of the solenoid valve to flow the reinforcement liquid to the ejecting portion. The method of claim 1,
Fire suppression apparatus of the underground transmission OF cable further comprises a direction changer formed to change the flow direction of the reinforcing liquid between the distal end portion of the solenoid valve and the blower. In the fire suppression method of underground transmission OF cable,
Detecting a fire signal including heat or smoke generated from the underground transmission OF cable in a fire detector; And
Delivering an electrical signal to the solenoid valve to open the solenoid valve;
Fire suppression method of the underground transmission OF cable in which the reinforcing liquid is ejected to the ejecting portion according to the above steps. The method of claim 7, wherein
Checking whether the stop valve is open and opening the valve between the step of detecting the fire signal and the step of opening the solenoid valve.

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