New energy box-type substation active fire extinguishing system and box-type substation applying same

Abstract

The utility model relates to the technical field of transformer fire fighting, in particular to a new energy box-type transformer substation active fire fighting system and a box-type transformer substation applying the new energy box-type transformer substation active fire fighting system. The active fire extinguishing system comprises a smoke alarm, a temperature controller, a first intermediate relay, a second intermediate relay, a carbon dioxide storage container and a ventilation system, an electromagnetic valve is arranged at an output port of the carbon dioxide storage container, the ventilation system comprises a fan and a shutter, and the shutter is provided with a shutter switch electromagnet. When the smoke alarm detects smoke and the temperature controller detects overtemperature, the fan and the shutter switch electromagnet are both closed, so that a closed environment is provided. And at the moment, the electromagnetic valve opens the carbon dioxide storage container, so that carbon dioxide is released for active fire extinguishing. According to the active fire-fighting system provided by the utility model, overtemperature alarm is added, and the active fire-fighting system is triggered only when smoke and overtemperature are detected, so that the occurrence of false alarm is effectively reduced, and unnecessary loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer fire protection, in particular to a new energy box-type transformer active fire protection system and a box-type substation using the same. Background Art

[0002] Currently, new energy box-type transformer fire protection systems typically consist of a smoke alarm and a manual fire extinguisher. The basic principle is that when the smoke alarm detects smoke, the contact activates, and the contact signal is uploaded to the measurement and control backend, which sounds an alarm in the main control room, notifying the on-duty personnel to investigate. The manual fire extinguisher that comes with the equipment is only suitable for fires that occur while personnel are working on-site, or if the fire is still ongoing when the on-duty personnel arrive to investigate after the equipment alarm sounds. Because the equipment lacks an active fire protection system, by the time the on-duty personnel arrive on-site, the fire has often spread to the entire box-type transformer compartment, or even the entire equipment, causing significant property damage and even threatening the personal safety of those involved. Utility Model Content

[0003] The main purpose of the utility model is to provide a new energy box-type active fire protection system and a box-type substation using the same, aiming to solve the problems of many false alarms and inability to actively extinguish fires in existing new energy box-type substations.

[0004] To achieve the above objectives, the present invention proposes a new energy box transformer active fire protection system, comprising a smoke alarm, a thermostat, a first intermediate relay, a second intermediate relay, a carbon dioxide storage container and a ventilation system, wherein the carbon dioxide storage container is provided with a solenoid valve at the output port;

[0005] The smoke alarm has a smoke alarm normally open contact, one end of the smoke alarm normally open contact is connected to the live wire, the other end of the smoke alarm normally open contact is connected to the coil of the first intermediate relay, and the other end of the coil of the first intermediate relay is connected to the neutral wire;

[0006] The thermostat has a first temperature-controlled normally open contact, one end of the first temperature-controlled normally open contact is connected to the live wire, the other end of the first temperature-controlled normally open contact is connected to the coil of the second intermediate relay, and the other end of the coil of the second intermediate relay is connected to the neutral wire;

[0007] One end of the normally open contact of the first intermediate relay is connected to the live wire, the other end of the normally open contact of the first intermediate relay is connected to one end of the normally open contact of the second intermediate relay, the other end of the normally open contact of the second intermediate relay is connected to the solenoid valve, and the other end of the solenoid valve is connected to the neutral wire;

[0008] The ventilation system includes a fan and blinds, and the blinds have a blinds switch electromagnet. One end of the fan and the blinds switch electromagnet are both connected to the live wire, and the other end of the fan and the other end of the blinds switch electromagnet are both connected to one end of the normally closed contact of the first intermediate relay and one end of the normally closed contact of the second intermediate relay; the other end of the normally closed contact of the first intermediate relay and the other end of the normally closed contact of the second intermediate relay are respectively connected to the neutral wire.

[0009] Furthermore, it also includes a first time relay, which is connected between the normally open contact of the second intermediate relay and the solenoid valve; wherein, one end of the coil of the first time relay is connected to the normally open contact of the second intermediate relay, the other end of the coil of the first time relay is connected to the neutral wire, one end of the normally open contact of the first time relay is connected to the live wire, and the other end of the normally open contact of the first time relay is connected to the solenoid valve.

[0010] Furthermore, it also includes a box door travel switch, which is connected in series between the normally open contact of the second intermediate relay and the coil of the first time relay.

[0011] Furthermore, it also includes a third intermediate relay and an electromagnetic lock; one end of the coil of the third intermediate relay is connected to the other end of the normally open contact of the first time relay, and the other end of the third intermediate relay is connected to the neutral line; one end of the normally open contact of the third intermediate relay is connected to the live wire, the other end of the third intermediate relay is connected to one end of the electromagnetic lock, and the other end of the electromagnetic lock is connected to the neutral line.

[0012] Furthermore, it also includes a second time relay; the normally closed contact of the second time relay is connected in series between the normally open contact of the first time relay and the coil of the third intermediate relay; one end of the normally closed contact of the third intermediate relay is connected to the other end of the fan and the other end of the blinds switch electromagnet, and the other end of the normally closed contact of the third intermediate relay is connected to one end of the normally closed contact of the first intermediate relay and one end of the normally closed contact of the second intermediate relay; the other end of the normally open contact of the third intermediate relay is connected to the other end of the normally open contact of the first time relay, and the other end of the normally open contact of the third intermediate relay is connected to one end of the normally closed contact of the second intermediate relay, and the other end of the normally closed contact of the second intermediate relay is also connected to one end of the coil of the second time relay, and the other end of the coil of the second time relay is connected to the neutral line.

[0013] Furthermore, it also includes a third time relay and a fourth intermediate relay; one end of the normally open contact of the second time relay is connected to the live wire, the other end of the normally open contact of the second time relay is connected to one end of the normally closed contact of the third time relay, the other end of the normally closed contact of the third time relay is connected to the coil of the fourth intermediate relay, and the other end of the coil of the fourth intermediate relay is connected to the neutral wire; the other end of the normally closed contact of the third time relay is also connected to the coil of the third time relay, and the other end of the coil of the third time relay is connected to the neutral wire; one end of the normally open contact of the fourth intermediate relay is connected to the live wire, and the other end of the normally open contact of the fourth intermediate relay is connected to one end of the electromagnetic lock; the other end of the normally open contact of the fourth intermediate relay is connected to one end of the normally closed contact of the third time relay.

[0014] Furthermore, the thermostat has a second temperature-controlled normally open contact, one end of the second temperature-controlled normally open contact is connected to the live wire, and the other end of the ventilation normally open contact is connected to one end of the fan and the shutter switch electromagnet.

[0015] Furthermore, it also includes a measurement and control device; the other end of the normally open contact of the first intermediate relay is also connected to the measurement and control device, and the other end of the measurement and control device is connected to the neutral line.

[0016] Furthermore, it also includes an audible and visual alarm; the other end of the normally open contact of the second intermediate relay is also connected to one end of the audible and visual alarm, and the other end of the audible and visual alarm is connected to the neutral line.

[0017] The second aspect of the present utility model discloses a box-type substation, including the new energy box-type substation active fire protection system disclosed in the first aspect of the present utility model.

[0018] The technical solution provided by the utility model may have the following beneficial effects:

[0019] Since most new energy box-type substations are located in remote mountainous areas and ocean environments and are often unmanned for long periods of time, this utility model provides an active fire protection system for new energy box-type substations that can automatically determine whether a fire has occurred in electrical equipment and respond quickly, effectively controlling the escalation of the fire in its early stages.

[0020] Furthermore, due to the harsh operating environments of new energy box-type substations, previous designs used smoke alarms as the sole fire alarm, which were prone to false alarms due to dust and other factors. The active fire protection system provided by the present invention incorporates an over-temperature alarm, requiring both smoke and over-temperature detection to trigger the active fire protection system, effectively reducing false alarms and unnecessary losses.

[0021] Since most box-type substations adopt a compact design, the space of each compartment is relatively small and relatively closed. Therefore, the new energy box-type substation active fire protection system provided by the utility model adopts carbon dioxide asphyxiation fire extinguishing, which only requires a small amount of gas to fill the entire space.

[0022] Compared to existing sprinkler fire extinguishing methods, carbon dioxide gas is environmentally friendly and has no impact on components within the equipment. Fires can be extinguished in the early stages, and most components not affected can be reused after testing, minimizing losses. This method is particularly suitable for box-type substations.

[0023] Furthermore, carbon dioxide gas is inexpensive and reusable. The carbon dioxide gas storage container is small, eliminating the need to modify the existing box-type transformer design. This can be achieved by simply securing the gas cylinder to a corner or even the top of the box. Furthermore, the electrical components of the system are already part of the original box-type transformer design, making retrofitting the system to existing equipment relatively simple with minimal modifications.

[0024] The rest of the active fire protection system consists of relatively basic components, keeping the overall cost of the system within a reasonable range. The system is simple, and the electrical wiring for all components can be independently installed within the box-type substation to prevent any disruption to the system's operation in the event of a fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 This is the electrical secondary schematic diagram of the active fire protection system of the present utility model;

[0027] Explanation of the accompanying symbols: SD-smoke alarm, SD1-smoke alarm normally open contact, KS-thermostat, KS1-first temperature control normally open contact, RT-temperature sensor, KS2-second temperature control normally open contact, KA1-first intermediate relay, KA2-second intermediate relay, YV-solenoid valve, FJ-fan, YA-shutter switch electromagnet, KT1-first time relay, ST-door travel switch, KA3-third intermediate relay, YK-electromagnetic lock, KT2-second time relay, KT3-third time relay, KA4-fourth intermediate relay, ln-measurement and control device, HA-sound and light alarm. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0031] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or solutions that meet both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0032] The following combination Figure 1 , describes an active fire protection system for a new energy box transformer according to an embodiment of the present utility model, which includes a smoke alarm SD, a thermostat KS, a first intermediate relay KA1, a second intermediate relay KA2, a carbon dioxide storage container, and a ventilation system. The carbon dioxide storage container is provided with a solenoid valve YV at the output port;

[0033] The smoke alarm SD has a smoke alarm normally open contact SD1, one end of which is connected to the live wire, the other end of which is connected to the coil of the first intermediate relay KA1, and the other end of which is connected to the neutral wire.

[0034] The thermostat KS has a first temperature-controlled normally open contact KS1, one end of which is connected to the live wire, the other end of which is connected to the coil of the second intermediate relay KA2, and the other end of which is connected to the neutral wire.

[0035] One end of the normally open contact of the first intermediate relay KA1 is connected to the live wire, the other end of the normally open contact of the first intermediate relay KA1 is connected to one end of the normally open contact of the second intermediate relay KA2, the other end of the normally open contact of the second intermediate relay KA2 is connected to the solenoid valve YV, and the other end of the solenoid valve YV is connected to the neutral wire;

[0036] The ventilation system includes a fan FJ and blinds, and the blinds have a blinds switch electromagnet YA. One end of the fan FJ and the blinds switch electromagnet YA are both connected to the live wire, and the other end of the fan FJ and the other end of the blinds switch electromagnet YA are both connected to one end of the normally closed contact of the first intermediate relay KA1 and one end of the normally closed contact of the second intermediate relay KA2; the other end of the normally closed contact of the first intermediate relay KA1 and the other end of the normally closed contact of the second intermediate relay KA2 are respectively connected to the neutral wire.

[0037] Specifically, in the ventilation system, the shutter switch electromagnet YA controls the opening and closing of the shutters. When the shutter switch electromagnet YA is energized, the shutters open; when the shutter switch electromagnet YA is de-energized, the shutters close. The thermostat KS monitors the temperature inside the box-type substation via the temperature sensor RT. When the thermostat KS detects that the temperature exceeds a first preset value, it closes the first temperature control normally open contact KS1. This first preset value can be set as needed, such as 50°C, 55°C, or 60°C.

[0038] When the smoke alarm SD detects smoke, its smoke alarm normally-open contact SD1 closes, energizing the coil of the first intermediate relay KA1. The normally-closed contact of the first intermediate relay KA1 opens, and the normally-open contact of the first intermediate relay KA1 closes. When the thermostat KS detects that the temperature exceeds a first preset value, its first temperature-control normally-open contact KS1 closes, energizing the coil of the second intermediate relay KA2. The normally-closed contact of the second intermediate relay KA2 opens, and the normally-open contact of the second intermediate relay KA2 closes.

[0039] When both the normally closed contacts of the first and second intermediate relays KA1 and KA2 open, the fan FJ and the shutter switch electromagnet YA lose power, causing the fan FJ to cease operation. The shutters close due to the loss of power to the shutter switch electromagnet YA, creating a sealed environment. At this point, the normally open contacts of the first and second intermediate relays KA1 and KA2 close, causing the solenoid valve YV to open the carbon dioxide storage container, releasing carbon dioxide for active firefighting.

[0040] Since most new energy box-type substations are located in remote mountainous areas and ocean environments and are often unmanned for long periods of time, this utility model provides an active fire protection system for new energy box-type substations that can automatically determine whether a fire has occurred in electrical equipment and respond quickly, effectively controlling the escalation of the fire in its early stages.

[0041] Furthermore, due to the harsh operating environments of new energy box-type substations, previous designs used smoke alarms as the sole fire alarm, which were prone to false alarms due to dust and other factors. The active fire protection system provided by the present invention incorporates an over-temperature alarm, requiring both smoke and over-temperature detection to trigger the active fire protection system, effectively reducing false alarms and unnecessary losses.

[0042] Since most box-type substations adopt a compact design, the space of each compartment is relatively small and relatively closed. Therefore, the new energy box-type substation active fire protection system provided by the utility model adopts carbon dioxide asphyxiation fire extinguishing, which only requires a small amount of gas to fill the entire space.

[0043] Compared to existing sprinkler fire extinguishing methods, carbon dioxide gas is environmentally friendly and has no impact on components within the equipment. Fires can be extinguished in the early stages, and most components not affected can be reused after testing, minimizing losses. This method is particularly suitable for box-type substations.

[0044] Furthermore, carbon dioxide gas is inexpensive and reusable. The carbon dioxide gas storage container is small, eliminating the need to modify the existing box-type transformer design. This can be achieved by simply securing the gas cylinder to a corner or even the top of the box. Furthermore, the electrical components of the system are already part of the original box-type transformer design, making retrofitting the system to existing equipment relatively simple with minimal modifications.

[0045] The rest of the active fire protection system consists of relatively basic components, keeping the overall cost of the system within a reasonable range. The system is simple, and the electrical wiring for all components can be independently installed within the box-type substation to prevent any disruption to the system's operation in the event of a fire.

[0046] In a further preferred embodiment, the active fire-fighting system also includes a first time relay KT1, which is connected between the normally open contact of the second intermediate relay KA2 and the solenoid valve YV; wherein, one end of the coil of the first time relay KT1 is connected to the normally open contact of the second intermediate relay KA2, the other end of the coil of the first time relay KT1 is connected to the neutral line, one end of the normally open contact of the first time relay KT1 is connected to the live wire, and the other end of the normally open contact of the first time relay KT1 is connected to the solenoid valve YV.

[0047] In this embodiment, the first timer KT1 is used to set a timer to delay the energization of the solenoid valve YV. This allows time for maintenance personnel to determine whether to pause the opening of the solenoid valve YV to release carbon dioxide. Specifically, in some embodiments, the timer of the first timer KT1 is 30 seconds. Of course, in other embodiments, the timer of the first timer KT1 can be set to 1 minute, 2 minutes, or other times, depending on actual needs.

[0048] In a further preferred embodiment, the active fire fighting system further comprises a door travel switch ST, which is connected in series between the normally open contact of the second intermediate relay KA2 and the coil of the first time relay KT1.

[0049] Specifically, in this embodiment, when the door of the transformer is closed, the door travel switch ST is in the connected state; when the door is open, the door travel switch ST is in the disconnected state. In a specific application, when the normally open contacts of the first intermediate relay KA1 and the second intermediate relay KA2 are closed, the coil of the first time relay KT1 is energized, thereby starting the timer. If, at this time, a nearby operator receives the signal and opens the door, the door travel switch ST is disconnected. Consequently, the coil of the first time relay KT1 is de-energized, stopping the timer. This prevents the first time relay KT1 from closing its normally open contacts, rendering the CO2 cylinder solenoid valve YV inoperable. This effectively hands the scene over to the operator and cancels the automatic CO2 release from the active firefighting system. If, after the timer expires, the door travel switch ST remains open, the first time relay KT1 closes its normally open contacts, energizing the CO2 cylinder solenoid valve YV, opening the CO2 cylinder and releasing CO2, thus achieving active firefighting.

[0050] In this embodiment, a door travel switch ST is connected in series between the normally open contact of the second intermediate relay KA2 and the coil of the first time relay KT1. This de-energizes the first time relay KT1 when the door is opened by maintenance personnel. This prevents the first time relay KT1 from triggering the CO2 cylinder solenoid valve YV to open the CO2 cylinder, effectively handing over the site to maintenance personnel. This effectively prevents the system from being triggered when someone is working with the door open, ensuring personnel safety.

[0051] In a further preferred embodiment, the active fire-fighting system also includes a third intermediate relay KA3 and an electromagnetic lock YK; one end of the coil of the third intermediate relay KA3 is connected to the other end of the normally open contact of the first time relay KT1, and the other end of the third intermediate relay KA3 is connected to the neutral line; one end of the normally open contact of the third intermediate relay KA3 is connected to the live wire, and the other end of the third intermediate relay KA3 is connected to one end of the electromagnetic lock YK, and the other end of the electromagnetic lock YK is connected to the neutral line.

[0052] In this embodiment, an electromagnetic lock YK is installed on the inside of the door to lock the door. When electromagnetic lock YK is energized, it locks the door; when electromagnetic lock YK loses power, it unlocks the door. In a specific application, the coil of the third intermediate relay KA3 is connected in parallel with the electromagnetic valve YV. That is, when the normally open contact of the first time relay KT1 is closed, the electromagnetic valve YV opens to release carbon dioxide. At the same time, the coil of the third intermediate relay KA3 is energized, attracting the normally open contact of the third intermediate relay KA3, causing the electromagnetic lock YK to energize and lock the door. This prevents maintenance personnel from opening the door when carbon dioxide is released to extinguish a fire, thereby preventing the high-temperature, asphyxiating gas from reaching them and ensuring their safety. It also ensures that the firefighting effect is effectively extinguished by maintaining a sealed environment.

[0053] In a further preferred embodiment, the active fire fighting system also includes a second time relay KT2; the normally closed contact of the second time relay KT2 is connected in series between the normally open contact of the first time relay KT1 and the coil of the third intermediate relay KA3; one end of the normally closed contact of the third intermediate relay KA3 is connected to the other end of the fan FJ and the other end of the blinds switch electromagnet YA, and the other end of the normally closed contact of the third intermediate relay KA3 is connected to one end of the normally closed contact of the first intermediate relay KA1 and one end of the normally closed contact of the second intermediate relay KA2; the other end of the normally open contact of the third intermediate relay KA3 is connected to the other end of the normally open contact of the first time relay KT1, and the other end of the normally open contact of the third intermediate relay KA3 is connected to one end of the normally closed contact of the second intermediate relay KA2, and the other end of the normally closed contact of the second intermediate relay KA2 is also connected to one end of the coil of the second time relay KT2, and the other end of the coil of the second time relay KT2 is connected to the neutral line.

[0054] In this embodiment, when the coil of the third intermediate relay KA3 is energized, its normally open contact closes. At this point, even though the first temperature-controlled normally open contact KS1 of the thermostat KS is disconnected, and the normally open contact of the second intermediate relay KA2 is disconnected, causing the normally open contact of the first time relay KT1 to open, the coil of the third intermediate relay KA3 continues to be energized, its normally open contact remains closed, and its normally closed contact remains open. This means that the fan FJ and the blinds remain closed.

[0055] Therefore, when the fire protection system is activated to release carbon dioxide gas, until the thermostat KS detects that the temperature of the box-type transformer is lower than the first preset value, the first temperature-controlled normally open contact KS1 of the thermostat KS is disconnected, causing the coil of the second intermediate relay KA2 to lose power, and the normally closed contact of the second intermediate relay KA2 to close, so that the coil of the second time relay KT2 is energized, and the second time relay KT2 starts timing. After the timing is completed, the normally closed contact of the second time relay KT2 is disconnected, causing the coil of the third intermediate relay KA3 and the solenoid valve YV to lose power, thereby disconnecting the normally open contact of the third intermediate relay KA3, and closing the normally closed contact of the third intermediate relay KA3, so that the fan FJ and the shutter switch electromagnet YA are energized. At this time, the fan FJ and the shutter are both in the open state, so that the smoke and carbon dioxide gas in the box are discharged.

[0056] This embodiment uses a second timer relay KT2 to ensure that when the indoor temperature of the fire box falls below a preset value, a certain amount of time is reserved to ensure that the situation stabilizes before exhausting the smoke, toxic gases, and carbon dioxide in the room, thereby ensuring effective fire extinguishing. Specifically, in some embodiments, the timer of the second timer relay KT2 is 10 minutes. Of course, in other embodiments, the timer of the second timer relay KT2 is 8 minutes, 15 minutes, etc., which can be adjusted according to actual needs.

[0057] In a further preferred embodiment, the active fire fighting system further includes a third time relay KT3 and a fourth intermediate relay KA4; one end of the normally open contact of the second time relay KT2 is connected to the live wire, the other end of the normally open contact of the second time relay KT2 is connected to one end of the normally closed contact of the third time relay KT3, the other end of the normally closed contact of the third time relay KT3 is connected to the coil of the fourth intermediate relay KA4, and the other end of the coil of the fourth intermediate relay KA4 is connected to the neutral wire; the other end of the normally closed contact of the third time relay KT3 is also connected to the coil of the third time relay KT3, and the other end of the coil of the third time relay KT3 is connected to the neutral wire;

[0058] One end of the normally open contact of the fourth intermediate relay KA4 is connected to the live wire, and the other end of the normally open contact of the fourth intermediate relay KA4 is connected to one end of the electromagnetic lock YK; the other end of the normally open contact of the fourth intermediate relay KA4 is connected to one end of the normally closed contact of the third time relay KT3.

[0059] In this embodiment, when the normally open contact of the second time relay KT2 closes, the coil of the fourth intermediate relay KA4 is energized, and the normally open contact of the fourth intermediate relay KA4 closes, maintaining continuous power to the coil of the fourth intermediate relay KA4. Simultaneously, the closure of the normally open contact of the fourth intermediate relay KA4 also energizes the electromagnetic lock YK, allowing the electromagnetic lock YK to remain locked.

[0060] The coil of the third time relay KT3 is connected in parallel with the coil of the fourth intermediate relay KA4. After the coil of the third time relay KT3 is energized, the third time relay KT3 starts timing. After the third time relay KT3 starts timing, the normally closed contact of the third time relay KT3 is disconnected, so that the coil of the fourth intermediate relay KA4 is de-energized, thereby disconnecting the normally open contact of the fourth intermediate relay KA4, and realizing power-off of the electromagnetic lock YK, so that the box door can also be opened.

[0061] In this embodiment, through the cooperation of the third time relay KT3 and the fourth intermediate relay KA4, a certain amount of time is reserved for exhausting indoor smoke, toxic gases and carbon dioxide before the door can be opened, so as to ensure the personal safety of operation and maintenance personnel.

[0062] Specifically, in some embodiments, the timing time of the third time relay KT3 is 10 minutes. Of course, in other embodiments, the timing time of the third time relay KT3 is 8 minutes, 15 minutes, etc., which is adjusted according to actual needs.

[0063] In a further preferred embodiment, the thermostat KS includes a second temperature-controlled normally-open contact KS2. One end of the second temperature-controlled normally-open contact KS2 is connected to the live wire, and the other end of the ventilation normally-open contact is connected to one end of the fan FJ and the shutter opening electromagnet YA. Specifically, when the thermostat KS detects that the indoor temperature exceeds a second preset value, the thermostat KS controls the second temperature-controlled normally-open contact KS2 to close, energizing the fan FJ and the shutter opening electromagnet YA, thereby achieving ventilation and cooling. The second preset value is lower than the first preset value. Specifically, the second preset value can be 35 degrees Celsius, 40 degrees Celsius, etc., and can be set according to actual needs.

[0064] In a further preferred embodiment, the active fire protection system further includes a measurement and control device ln; the other end of the normally open contact of the first intermediate relay KA1 is also connected to the measurement and control device ln, and the other end of the measurement and control device ln is connected to the neutral line. Thus, when the smoke sensor detects smoke, the smoke alarm normally open contact SD1 closes, energizing the coil of the first intermediate relay KA1 and closing the normally open contact of the first intermediate relay KA1, thereby transmitting an electrical signal to the measurement and control device ln, thereby generating an alarm.

[0065] In a further preferred embodiment, the active fire protection system also includes an audible and visual alarm HA. The other end of the normally open contact of the second intermediate relay KA2 is also connected to one end of the audible and visual alarm HA, and the other end of the audible and visual alarm HA is connected to the neutral line. Specifically, the audible and visual alarm HA can be installed on the outer wall of the box-type substation. When the smoke sensor detects smoke and the thermostat KS detects overtemperature, the audible and visual alarm HA is triggered to sound an alarm, facilitating the location of nearby maintenance personnel.

[0066] The utility model also discloses a box-type substation, which includes the above-mentioned new energy box-type substation active fire protection system.

[0067] When the smoke alarm SD detects smoke, its smoke alarm normally-open contact SD1 closes, energizing the coil of the first intermediate relay KA1. The normally-closed contact of the first intermediate relay KA1 opens, and the normally-open contact of the first intermediate relay KA1 closes. When the thermostat KS detects that the temperature exceeds a first preset value, its first temperature-control normally-open contact KS1 closes, energizing the coil of the second intermediate relay KA2. The normally-closed contact of the second intermediate relay KA2 opens, and the normally-open contact of the second intermediate relay KA2 closes.

[0068] When both the normally closed contacts of the first and second intermediate relays KA1 and KA2 open, the fan FJ and the shutter switch electromagnet YA lose power, causing the fan FJ to cease operation. The shutters close due to the loss of power to the shutter switch electromagnet YA, creating a sealed environment. At this point, the normally open contacts of the first and second intermediate relays KA1 and KA2 close, causing the solenoid valve YV to open the carbon dioxide storage container, releasing carbon dioxide for active firefighting.

[0069] Since most new energy box-type substations are located in remote mountainous areas, oceans and other environments, they are unmanned for long periods of time. The utility model provides a new energy box-type active fire protection system that can automatically determine whether a fire has occurred in electrical equipment and respond quickly, which can effectively control the escalation of the situation in the early stages of a fire. In addition, due to the poor operating environment of new energy box-type substations, smoke alarms SD were used as the only fire alarm in previous designs, which were very prone to false alarms due to dust and other reasons. An over-temperature alarm is added to the active fire protection system provided by the utility model, which requires both smoke and over-temperature detection to trigger the active fire protection system, effectively reducing the occurrence of false alarms and unnecessary losses.

[0070] Since most box-type substations adopt a compact design, the space of each compartment is relatively small and relatively closed. Therefore, the utility model provides a new energy box-type transformer active fire protection system that adopts carbon dioxide asphyxiation fire extinguishing, and only a small amount of gas is needed to fill the entire space. Compared with the existing sprinkler fire extinguishing, carbon dioxide fire extinguishing causes less damage to electronic components, and some electronic components can be recycled to reduce losses, which is particularly suitable for box-type substations. In addition, carbon dioxide gas is low in cost, and the other parts of the active fire protection system are composed of relatively basic components, so the cost of the entire fire protection system can be controlled within a reasonable range. The entire active fire protection system is simple in structure, and the electrical wiring of all components can be independently installed in the box-type substation to avoid being affected by the fire and affecting the normal operation of the system.

[0071] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A new energy box-type active fire protection system, characterized by: It includes a smoke alarm, a thermostat, a first intermediate relay, a second intermediate relay, a carbon dioxide storage container and a ventilation system, wherein the carbon dioxide storage container is provided with a solenoid valve at the output port; The smoke alarm has a smoke alarm normally open contact, one end of the smoke alarm normally open contact is connected to the live wire, the other end of the smoke alarm normally open contact is connected to the coil of the first intermediate relay, and the other end of the coil of the first intermediate relay is connected to the neutral wire; The thermostat has a first temperature-controlled normally open contact, one end of the first temperature-controlled normally open contact is connected to the live wire, the other end of the first temperature-controlled normally open contact is connected to the coil of the second intermediate relay, and the other end of the coil of the second intermediate relay is connected to the neutral wire; One end of the normally open contact of the first intermediate relay is connected to the live wire, the other end of the normally open contact of the first intermediate relay is connected to one end of the normally open contact of the second intermediate relay, the other end of the normally open contact of the second intermediate relay is connected to the solenoid valve, and the other end of the solenoid valve is connected to the neutral wire; The ventilation system includes a fan and blinds, and the blinds have a blinds switch electromagnet. One end of the fan and the blinds switch electromagnet are both connected to the live wire, and the other end of the fan and the other end of the blinds switch electromagnet are both connected to one end of the normally closed contact of the first intermediate relay and one end of the normally closed contact of the second intermediate relay; the other end of the normally closed contact of the first intermediate relay and the other end of the normally closed contact of the second intermediate relay are respectively connected to the neutral wire.

2. The new energy box-type active fire protection system according to claim 1 is characterized by: It also includes a first time relay, which is connected between the normally open contact of the second intermediate relay and the solenoid valve; wherein, one end of the coil of the first time relay is connected to the normally open contact of the second intermediate relay, the other end of the coil of the first time relay is connected to the neutral wire, one end of the normally open contact of the first time relay is connected to the live wire, and the other end of the normally open contact of the first time relay is connected to the solenoid valve.

3. The new energy box-type active fire protection system according to claim 2 is characterized by: It also includes a box door travel switch, which is connected in series between the normally open contact of the second intermediate relay and the coil of the first time relay.

4. The new energy box-type transformer active fire protection system according to claim 2 is characterized in that: Also includes a third intermediate relay and an electromagnetic lock; One end of the coil of the third intermediate relay is connected to the other end of the normally open contact of the first time relay, and the other end of the third intermediate relay is connected to the neutral line; One end of the normally open contact of the third intermediate relay is connected to the live wire, the other end of the third intermediate relay is connected to one end of the electromagnetic lock, and the other end of the electromagnetic lock is connected to the neutral wire.

5. The new energy box-type active fire protection system according to claim 4 is characterized in that: Also included is a second time relay; The normally closed contact of the second time relay is connected in series between the normally open contact of the first time relay and the coil of the third intermediate relay; One end of the normally closed contact of the third intermediate relay is connected to the other end of the fan and the other end of the shutter switch electromagnet, and the other end of the normally closed contact of the third intermediate relay is connected to one end of the normally closed contact of the first intermediate relay and one end of the normally closed contact of the second intermediate relay; The other end of the normally open contact of the third intermediate relay is connected to the other end of the normally open contact of the first time relay, the other end of the normally open contact of the third intermediate relay is connected to one end of the normally closed contact of the second intermediate relay, the other end of the normally closed contact of the second intermediate relay is also connected to one end of the coil of the second time relay, and the other end of the coil of the second time relay is connected to the neutral line.

6. The new energy box-type active fire protection system according to claim 5 is characterized by: Also includes a third time relay and a fourth intermediate relay; One end of the normally open contact of the second time relay is connected to the live wire, the other end of the normally open contact of the second time relay is connected to one end of the normally closed contact of the third time relay, the other end of the normally closed contact of the third time relay is connected to the coil of the fourth intermediate relay, and the other end of the coil of the fourth intermediate relay is connected to the neutral wire; the other end of the normally closed contact of the third time relay is also connected to the coil of the third time relay, and the other end of the coil of the third time relay is connected to the neutral wire; One end of the normally open contact of the fourth intermediate relay is connected to the live wire, and the other end of the normally open contact of the fourth intermediate relay is connected to one end of the electromagnetic lock; the other end of the normally open contact of the fourth intermediate relay is connected to one end of the normally closed contact of the third time relay.

7. The new energy box-type transformer active fire protection system according to claim 1 is characterized by: The thermostat has a second temperature-controlled normally open contact, one end of the second temperature-controlled normally open contact is connected to the live wire, and the other end of the second temperature-controlled normally open contact is connected to one end of the fan and the shutter switch electromagnet.

8. The new energy box-type transformer active fire protection system according to claim 1 is characterized by: It also includes a measurement and control device; the other end of the normally open contact of the first intermediate relay is also connected to the measurement and control device, and the other end of the measurement and control device is connected to the neutral line.

9. The new energy box-type transformer active fire protection system according to claim 1 is characterized by: It also includes an audible and visual alarm; the other end of the normally open contact of the second intermediate relay is also connected to one end of the audible and visual alarm, and the other end of the audible and visual alarm is connected to the neutral line.

10. A box-type substation, characterized by: It includes the new energy box transformer active fire protection system as described in any one of claims 1 to 9.

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