Transformer substation fire extinguishing system

Abstract

The utility model discloses a transformer substation fire extinguishing system which comprises a transformer substation shell, battery cabinets are installed in the transformer substation shell at intervals, and a medium-voltage switch cabinet is arranged on one side of each battery cabinet. A fire extinguishing system is arranged in the transformer substation shell and comprises a fire alarm control box, a combustible gas alarm control box and a fire extinguishing agent release control box. The fire alarm control box is matched with the combustible gas alarm control box to receive an alarm signal of the detector, the fire extinguishing agent release control box is linked to control the exhaust device and the fire extinguishing device, the exhaust device comprises an exhaust fan and a pipeline type exhaust machine, and the fire extinguishing device comprises a CO2 fire extinguisher box and a fire extinguishing agent storage tank. According to the utility model, the detector is used for monitoring and early warning the dissipated gas generated when the thermal runaway of the energy storage battery cabinet occurs, so that the fire risk can be found in time, the exhaust device is quickly linked with the fire extinguishing device to control the fire behavior and improve the fire extinguishing efficiency at the early stage of the fire, the influence on the environment is reduced, and the safety of personnel and property is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer substations, in particular to a fire protection system for transformer substations. Background Art

[0002] Modular distribution type intelligent box substation, also known as prefabricated electrical equipment room, skid-mounted room, modular equipment room, prefabricated cabin combination equipment, etc., is widely used in power generation, mining, chemical industry, crude oil and natural gas, transportation, production line and industrial plant, offshore platform and other places. Its internal main power distribution equipment and heating, cooling, ventilation, lighting, fire alarm, monitoring and other supporting equipment are assembled and debugged in the factory, and prefabricated optical cables, prefabricated cables and other "plug and play" standardized connections are used on site, so that the optical cables and cables between primary equipment and secondary equipment, and between secondary equipment can be quickly connected, reducing the safety risk of on-site construction, thereby greatly shortening the on-site construction period.

[0003] Existing mobile substations have large air circulation during transportation and are used in complex locations. When they are subjected to friction or external moisture, volcanic ash, salt spray, etc. invade the interior during transportation, the lines may be damaged and the UPS emergency power supply may be under pressure, causing the internal lithium-ion battery to thermally run away and thus induce a fire. The fire will quickly expand and spread in a short period of time, releasing flammable and toxic gases, affecting the escape of people in the fire scene and fire rescue. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and provide a substation fire protection system.

[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions, including:

[0006] A transformer substation shell, wherein a battery cabinet is installed in the internal compartment of the transformer substation shell, and a medium-voltage switch cabinet is arranged on one side of the battery cabinet;

[0007] A fire protection system is arranged inside the substation shell, and the fire protection system includes a fire alarm control box, a combustible gas alarm control box and a fire extinguishing agent release control box;

[0008] The fire alarm control box cooperates with the combustible gas alarm control box to receive the alarm signal of the detector, and links the fire extinguishing agent release control box to control the exhaust device and the fire extinguishing device. The exhaust device includes an exhaust fan and a ducted exhaust fan, and the fire extinguishing device includes a CO2 fire extinguisher box and a fire extinguishing agent storage tank.

[0009] As a further description of the above technical solution, air outlets and air inlets are fixed on both side end faces of the substation shell, an exhaust device is fixed through the substation shell, and the exhaust fan and the ducted exhaust fan are driven by an exhaust control panel.

[0010] As a further description of the above technical solution, a plurality of air sampling points are arranged inside the substation shell, and the air sampling points are used to monitor the air status inside the substation shell in real time, and cooperate with the combustible gas alarm control box for monitoring.

[0011] As a further description of the above technical solution, the air outlet is detachably fixed with an exhaust fan, the exhaust fan is connected to a fire damper, and the exhaust fan cooperates with the fire damper to control the exhaust process.

[0012] As a further description of the above technical solution, a ducted exhaust fan is detachably fixed to one side of the air inlet, the ducted exhaust fan is connected to the medium-voltage switch cabinet, and the ducted exhaust fan is used to exhaust hot air generated by arc faults.

[0013] As a further description of the above technical solution, a pressure relief port is also provided on one side of the ducted exhaust fan, and the pressure relief port is installed at a height of more than 2 / 3 of the substation shell.

[0014] As a further description of the above technical solution, the fire alarm control box, the fire extinguishing agent release control box and the combustible gas alarm control box are fixed in sequence between the hatches at the front of the substation shell, and a data interface control box is also fixed above the combustible gas alarm control box.

[0015] As a further description of the above technical solution, an audible and visual alarm and an electric alarm are also fixed on the upper part of the substation shell, and a repeater panel and a local control panel are arranged on one side of the hatch. A manual release button, a manual termination button and a maintenance button are arranged on the local control panel in sequence.

[0016] As a further description of the above technical solution, the detector includes a smoke temperature detector and a combustible gas detector, and the smoke temperature detector and the combustible gas detector are symmetrically arranged inside the substation shell.

[0017] As a further description of the above technical solution, the fire extinguishing agent storage tank is fixed in the substation shell through a support frame, and the fire extinguishing agent storage tank is fixedly connected to a fire extinguishing agent release pipeline through a hanger, and the tail of the fire extinguishing agent release pipeline is connected to multiple groups of nozzles.

[0018] The beneficial effects of the utility model are as follows:

[0019] 1. The utility model can timely detect the risk of fire by monitoring and warning the dissipated gas generated by the energy storage battery cabinet when thermal runaway occurs through the detector, and quickly link the fire extinguishing device through the exhaust device to control the fire and improve the fire extinguishing efficiency in the early stage of the fire, reduce the impact on the environment, and protect the safety of personnel and property.

[0020] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model substation fire protection system;

[0022] Figure 2 This is the front view of the fire protection system of the utility model substation;

[0023] Figure 3 It is a left view of the utility model substation fire protection system;

[0024] Figure 4 It is a right view of the utility model substation fire protection system;

[0025] Figure 5 yes Figure 1 Schematic diagram of the structure of the fire extinguishing agent storage tank.

[0026] Reference numerals:

[0027] 1. Substation shell; 2. Battery cabinet; 3. Medium voltage switch cabinet; 4. Fire alarm control box; 5. Combustible gas alarm control box; 6. Fire extinguishing agent release control box; 7. Exhaust device; 71. Exhaust fan; 72. Ducted exhaust fan; 8. Fire extinguishing device; 81. CO2 fire extinguisher box; 82. Fire extinguishing agent storage tank; 9. Air outlet; 10. Air inlet; 11. Exhaust control panel; 12. Air sampling point; 13. Fire damper; 14. Pressure relief port; 15. Hatch door; 16. Data interface control box; 17. Sound and light alarm; 18. Electric alarm; 19. Repeater panel; 20. Local control panel; 201. Manual release button; 202. Manual termination button; 203. Maintenance button; 21. Smoke temperature detector; 22. Combustible gas detector; 23. Support frame; 24. Hanger; 25. Fire extinguishing agent release pipeline; 26. Sprinkler. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0029] like Figure 1-Figure 5As shown, in one embodiment, a substation fire protection system includes: a substation shell 1, a battery cabinet 2 is installed in the internal compartment of the substation shell 1, a medium-voltage switch cabinet 3 is arranged on one side of the battery cabinet 2, the battery cabinet 2 is used to store battery modules, and the medium-voltage switch cabinet 3 is used to control and protect the medium-voltage equipment in the power system to ensure its normal operation.

[0030] like Figure 1-Figure 5 As shown, in this embodiment, a fire protection system is arranged inside the substation housing 1, and the fire protection system includes a fire alarm control box 4, a combustible gas alarm control box 5 and a fire extinguishing agent release control box 6. The fire alarm control box 4, the fire extinguishing agent release control box 6 and the combustible gas alarm control box 5 are fixed in sequence between the hatches 15 at the front of the substation housing 1, and a data interface control box 16 is also fixed above the combustible gas alarm control box 5.

[0031] Among them, the fire alarm control box 4 cooperates with the combustible gas alarm control box 5 to receive the alarm signal of the detector, and links the fire extinguishing agent release control box 6 to control the exhaust device 7 and the fire extinguishing device 8. Among them, the fire alarm control box 4 is used to monitor the smoke and temperature inside the substation, and send out a fire alarm signal in time so as to take corresponding fire extinguishing measures; the combustible gas alarm control box 5 is responsible for monitoring the combustible gas concentration inside the substation. If it exceeds the preset threshold, it will send out a combustible gas alarm signal to prevent the occurrence of fire; the fire extinguishing agent release control box 6 is used to control the release of the fire extinguishing agent. Once the fire and combustible gas concentration exceed the threshold, it will trigger the release of the fire extinguishing agent to extinguish the fire.

[0032] like Figure 1-Figure 5 As shown, in this embodiment, air outlets 9 and air inlets 10 are fixed to the end faces of both sides of the transformer substation shell 1, an exhaust device 7 is fixed through the transformer substation shell 1, the exhaust device 7 includes an exhaust fan 71 and a duct-type exhaust machine 72, and the fire extinguishing device 8 includes a CO2 fire extinguisher box 81 and a fire extinguishing agent storage tank 82. Specifically, the exhaust fan 71 and the duct-type exhaust machine 72 are driven by the exhaust control panel 11.

[0033] Specifically, the air outlet 9 is detachably fixed with an exhaust fan 71, and the exhaust fan 71 is connected to a fire damper 13. The exhaust fan 71 cooperates with the fire damper 13 to control the exhaust process: the fire damper 13 is a normally open valve, which is opened by a 24V DC power supply from the control center or opened manually, and automatically closes at 280°C.

[0034] In addition, a ducted exhaust fan 72 is detachably fixed on one side of the air inlet 10, and the ducted exhaust fan 72 is connected to the medium-voltage switch cabinet 3. When an arc fault occurs in the medium-voltage switch cabinet 3, the temperature at the fault location will immediately rise to above 20,000°C. Due to the rapid and substantial increase in temperature, the internal components vaporize to form an overheated gas ball, which will cause a destructive explosion. The ducted exhaust fan 72 is used to exhaust the hot gas generated by the arc fault.

[0035] Furthermore, a pressure relief port 14 is also provided on one side of the ducted exhaust fan 72, and when the internal pressure is abnormal, the pressure is released in time to ensure the structural safety of the substation shell 1. Specifically, the pressure relief port 14 is installed at a height above the substation shell 12 / 3. In addition, a plurality of groups of air sampling points 12 are provided inside the substation shell 1, and these air sampling points 12 are used to monitor the air state inside the substation shell 1 in real time, such as temperature, humidity, gas concentration, etc. Through these sampling points, the environmental information inside the shell can be obtained in time, and the combustible gas alarm control box 5 is cooperated for monitoring. When the preset threshold is exceeded, the corresponding alarm signal is triggered to remind the operator to take corresponding measures to ensure the safe operation of the substation.

[0036] In addition, an audible and visual alarm 17 and an electric alarm bell 18 are fixed on the upper part of the substation shell 1, and a repeater panel 19 and a local control panel 20 are arranged on one side of the hatch 15. The repeater panel 19 is used to receive and transmit the signal of the monitoring system and forward it to the control center or display screen at other locations, and the local control panel 20 is used to facilitate the operator to manually control and maintain the equipment inside the substation shell 1. Specifically, the local control panel 20 is provided with a manual release button 201, a manual stop button 202 and a maintenance button 203 in sequence. The manual release button 201 is used to manually trigger the fire extinguishing device 8 to release the fire extinguishing agent; the manual stop button 202 is used to stop the sound and light of the alarm and the alarm bell, and end the fire extinguishing process; the maintenance button 203 is used to perform maintenance and repair operations on the equipment.

[0037] like Figure 1-Figure 5 As shown, in this embodiment, the detectors include a smoke temperature detector 21 and a combustible gas detector 22, and the smoke temperature detector 21 and the combustible gas detector 22 are symmetrically arranged inside the substation shell 1.

[0038] like Figure 1-Figure 5As shown, in this embodiment, the fire extinguishing agent storage tank 82 is fixed in the substation shell 1 through a support frame 23. Among them, the fire extinguishing agent storage tank 82 is fixedly connected to the fire extinguishing agent release pipeline 25 through a hanger 24. The fire extinguishing agent release pipeline 25 can be divided into two parts: a static pipeline and a dynamic pipeline. The static pipeline is mainly composed of a hard pipe and a pipe bracket, which is used to transport the fire extinguishing agent from the storage tank to the nozzle 26; the dynamic pipeline is composed of a hose and a joint to cover a wider area. The tail of the fire extinguishing agent release pipeline 25 is connected to multiple groups of nozzles 26.

[0039] Specifically, the fire extinguishing agent uses perfluorohexanone: it has a relatively high boiling point (59°C), exists stably at room temperature, and has a vaporization heat of 88.0kJ / kg, which is only 1 / 25 of water; the dielectric strength is ≥110kv, it is non-corrosive to electrical equipment, can effectively isolate the contact between the power supply and the fire, and prevent electric sparks from causing fires; the fire extinguishing concentration is 4%-6%, and the safety margin is relatively high. It can diffuse and evaporate rapidly when used, quickly filling the fire scene and is safer for the human body when used.

[0040] Working principle:

[0041] (1) Combustible gas alarm:

[0042] 1) When the combustible gas detector 22 detects that the combustible gas concentration reaches 10% LFL, a gas alarm signal is issued, the exhaust device 7 is linked to open the exhaust process, and the sound and light alarm 17 is activated for a first-level warning;

[0043] 2) When the combustible gas detector 22 detects that the combustible gas concentration reaches 80% LEL, a gas alarm signal is issued, the exhaust device 7 is closed, the fire extinguishing device 8 is linked to start the fire extinguishing process, and the electric alarm 18 is activated for a secondary warning;

[0044] (2) Fire alarm:

[0045] 1) When the smoke and temperature detector 21 detects smoke generation or temperature rise, it issues a first-level fire alarm signal, opens the exhaust device 7 to exhaust the air, and activates the sound and light alarm 17 to issue a first-level warning;

[0046] 2) When the smoke and temperature detector 21 detects smoke generation and temperature rise, it issues a secondary fire alarm signal, shuts down the exhaust device 7, cuts off the power of the BMS and other equipment such as the air conditioner, cuts off the power of the corresponding battery cluster to prevent other cluster power supplies from reverse charging it, opens the fire extinguishing device 8 to carry out the fire extinguishing process, and starts the electric alarm 18 for secondary warning, and reports the fire alarm signal to the main control room at the same time;

[0047] (3) Gas fire extinguishing:

[0048] 1) After the perfluorohexanone fire extinguishing agent is released from the fire extinguishing agent storage tank 82, it is released 360° from the nozzle 26 through the fire extinguishing agent release pipeline 25 and quickly converted from liquid to gas, absorbing the heat generated by the battery and quickly reducing the temperature of the battery core; the volume of the vaporized perfluorohexanone expands to cover the entire protection area and thus plays a role in isolating oxygen; when the temperature in the protection area rises, it will cause chemical cracking, and some bonds in the fire extinguishing agent molecules will break, combining with the active free radicals generated during the flame combustion process, blocking the chain reaction of combustion, and playing a chemical inhibition and fire extinguishing function.

[0049] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A substation fire protection system, characterized in that: include: A transformer substation shell (1), wherein a battery cabinet (2) is installed in an internal compartment of the transformer substation shell (1), and a medium-voltage switch cabinet (3) is arranged on one side of the battery cabinet (2); A fire protection system is arranged inside the transformer substation housing (1), and the fire protection system comprises a fire alarm control box (4), a combustible gas alarm control box (5) and a fire extinguishing agent release control box (6); The fire alarm control box (4) cooperates with the combustible gas alarm control box (5) to receive the alarm signal of the detector, and links the fire extinguishing agent release control box (6) to control the exhaust device (7) and the fire extinguishing device (8), wherein the exhaust device (7) includes an exhaust fan (71) and a ducted exhaust fan (72), and the fire extinguishing device (8) includes a CO2 fire extinguisher box (81) and a fire extinguishing agent storage tank (82).

2. A substation fire protection system according to claim 1, characterized in that: An air outlet (9) and an air inlet (10) are fixed to the end surfaces of both sides of the transformer substation shell (1), an exhaust device (7) is fixed through the transformer substation shell (1), and the exhaust fan (71) and the duct-type exhaust fan (72) are driven by an exhaust control panel (11).

3. A substation fire protection system according to claim 1, characterized in that: A plurality of groups of air sampling points (12) are arranged inside the transformer substation shell (1), and the air sampling points (12) are used to monitor the air status inside the transformer substation shell (1) in real time, and cooperate with the combustible gas alarm control box (5) for monitoring.

4. A substation fire protection system according to claim 2, characterized in that: The air outlet (9) is detachably fixed with an exhaust fan (71), the exhaust fan (71) is connected to a fire damper (13), and the exhaust fan (71) cooperates with the fire damper (13) to control the exhaust process.

5. A substation fire protection system according to claim 2, characterized in that: A duct-type exhaust fan (72) is detachably fixed to one side of the air inlet (10), the duct-type exhaust fan (72) is connected to the medium-voltage switch cabinet (3), and the duct-type exhaust fan (72) is used to exhaust hot air generated by an arc fault.

6. A substation fire protection system according to claim 5, characterized in that: A pressure relief port (14) is also provided on one side of the duct-type exhaust fan (72), and the pressure relief port (14) is installed at a height of more than 2 / 3 of the transformer substation housing (1).

7. A substation fire protection system according to claim 1, characterized in that: The fire alarm control box (4), the fire extinguishing agent release control box (6) and the combustible gas alarm control box (5) are fixed in sequence between the hatch (15) at the front of the substation shell (1), and a data interface control box (16) is also fixed above the combustible gas alarm control box (5).

8. A substation fire protection system according to claim 7, characterized in that: An audible and visual alarm (17) and an electric alarm bell (18) are also fixed to the upper part of the substation housing (1); a repeater panel (19) and a local control panel (20) are arranged on one side of the hatch (15); and a manual release button (201), a manual termination button (202) and a maintenance button (203) are arranged in sequence on the local control panel (20).

9. A substation fire protection system according to claim 1, characterized in that: The detector comprises a smoke temperature detector (21) and a combustible gas detector (22), and the smoke temperature detector (21) and the combustible gas detector (22) are symmetrically arranged inside the transformer substation shell (1).

10. A substation fire protection system according to claim 1, characterized in that: The fire extinguishing agent storage tank (82) is fixed in the transformer substation shell (1) via a support frame (23), and the fire extinguishing agent storage tank (82) is fixedly connected to a fire extinguishing agent release pipeline (25) via a hanger (24), and the tail of the fire extinguishing agent release pipeline (25) is connected to multiple groups of nozzles (26).

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