Capacitor cabinet equipped with fire-fighting device

Abstract

The utility model discloses a capacitor cabinet equipped with a fire-fighting device, and belongs to the technical field of capacitor cabinets. A capacitor cabinet equipped with a fire fighting device comprises a capacitor cabinet body, a fire extinguishing mechanism, an execution mechanism installed in the capacitor cabinet body and a detection mechanism installed outside the capacitor cabinet body, the fire extinguishing mechanism comprises a fire extinguishing agent container tank, the execution mechanism comprises a release valve, the detection mechanism comprises a thermosensitive probe, and the thermosensitive probe is connected with the fire extinguishing agent container tank. The fire extinguishing agent container tank is communicated with the release valve, and the thermosensitive probe is installed on the release valve and electrically connected with the release valve. The utility model has the advantages that the timeliness of fire discovering and extinguishing is improved, and the loss cost of equipment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitor cabinets, in particular to a capacitor cabinet equipped with a fire-fighting device. Background Art

[0002] Low-voltage capacitor cabinets are an indispensable part of modern power systems. They can improve the power factor of the load, reduce reactive power, improve the efficiency of power supply equipment, ensure power quality, and reduce losses in the circuit.

[0003] Traditional capacitor cabinet electrical fire protection systems typically include temperature and smoke monitoring devices. These devices monitor parameters such as temperature, smoke, and gas within the capacitor cabinet in real time. If any abnormality is detected, an alarm is immediately sounded, notifying relevant personnel for action. For temperature monitoring, temperature sensors are typically used to monitor the electrical equipment within the capacitor cabinet, triggering an alarm if the temperature is too high or too low. For smoke monitoring, smoke sensors are typically used to monitor smoke within the capacitor cabinet, triggering an alarm if the smoke concentration is too high.

[0004] Capacitor cabinets primarily contain components that generate significant heat, such as capacitors and reactors. Conventional solutions involve creating heat dissipation holes in the cabinet's outer shell and installing a cooling fan behind the cabinet. However, after prolonged operation, the cable rubber may age. In the event of a line overload or short circuit, the cabinet's temperature rises dramatically. Conventional solutions are no longer sufficient to dissipate heat, posing a serious fire risk. Capacitor cabinet fires can spread very quickly, and by the time typical monitoring devices sound an alarm, it may be too late for personnel to extinguish the fire, resulting in even greater losses.

[0005] When a capacitor cabinet catches fire, conventional solutions require manual extinguishing or extinguishing the entire distribution room. Both solutions have certain drawbacks. Manual extinguishing is dangerous and time-consuming. If extinguishing the entire distribution room is done, other low-voltage cabinets that are not affected by the fire will also be scrapped, resulting in greater losses.

[0006] Therefore, it is very important to provide a system that can quickly and efficiently automatically extinguish fires in enclosed spaces. The electrical fire safety of barrier capacitor cabinets is of great significance to the safe operation of the entire power system. Utility Model Content

[0007] The purpose of the utility model is to solve the problem in the prior art that after a capacitor cabinet catches fire, there is a lack of timely and effective fire extinguishing means, which leads to large equipment losses, and to propose a capacitor cabinet equipped with a fire-fighting device.

[0008] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0009] A capacitor cabinet equipped with a fire-fighting device comprises a capacitor cabinet body and a fire-fighting mechanism, an actuator installed in the capacitor cabinet body, and a detection mechanism installed outside the capacitor cabinet body;

[0010] The fire extinguishing mechanism includes a fire extinguishing agent container tank, the actuator includes a release valve, and the detection mechanism includes a thermal probe;

[0011] The fire extinguishing agent container tank is communicated with a release valve, and the thermal probe is installed on the release valve and electrically connected to the release valve.

[0012] Furthermore, the actuator further comprises a release pipe, and the release valve is connected to the fire extinguishing agent container tank via the release pipe;

[0013] The fire extinguishing agent container tank and the release pipe are both filled with heptafluoropropane gas.

[0014] Furthermore, a container valve is installed on the fire extinguishing agent container tank, the release valve is connected to the fire extinguishing agent container tank through the container valve, and a pressure switch and a pipeline pressure gauge for detecting the internal pressure of the release pipe are installed on the container valve.

[0015] Furthermore, the actuator also includes an alarm, and the alarm is electrically connected to the pipeline pressure gauge.

[0016] Furthermore, the detection mechanism also includes a terminal pressure gauge installed outside the cabinet for detecting the internal pressure of the release pipe.

[0017] Furthermore, the actuator also includes a valve controller, which is electrically connected to the terminal pressure gauge, the thermistor probe, and the release valve.

[0018] Furthermore, the capacitor cabinet body includes a cabinet body and capacitors and reactors arranged in the cabinet body. There are multiple release valves, and the multiple release valves correspond one-to-one to the capacitors and reactors.

[0019] Compared with the prior art, the present invention provides a capacitor cabinet equipped with a fire protection device, which has the following beneficial effects:

[0020] The utility model discloses a capacitor cabinet equipped with a fire-fighting device. When a fire occurs in the capacitor cabinet body, a thermal probe detects that the temperature rises and exceeds a set action value, and the release valve is opened to release the fire extinguishing agent in the fire extinguishing agent container tank, so as to promptly extinguish the fire in the capacitor cabinet body. The utility model improves the timeliness of discovering and extinguishing the fire in the capacitor cabinet body, reduces the equipment loss cost, and the fire extinguishing mechanism is installed outside the capacitor cabinet body, reduces the risk of the fire extinguishing mechanism being affected by the fire, improves the stability of the operation of the fire extinguishing mechanism, and facilitates the alarm to promptly notify people near the fire.

[0021] Other advantages, objectives and features of the present invention will be described in the following description to some extent; and will be apparent to those skilled in the art based on an examination of the following; or may be taught from the practice of the present invention to some extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the internal structure of the capacitor cabinet of the present invention;

[0023] Figure 2 For the utility model Figure 1 A schematic diagram of the structure of part A in the middle;

[0024] Figure 3 For the utility model Figure 1 A magnified schematic diagram of the structure of part B;

[0025] Figure 4 This is a schematic diagram of the release valve structure of the utility model;

[0026] Figure 5 This is a schematic diagram of the valve controller of the present utility model.

[0027] In the picture:

[0028] 1. Fire extinguishing agent container tank; 2. Pipeline pressure gauge; 3. Pressure switch; 4. Alarm; 5. Container valve; 6. Fixing bolts; 7. Fire extinguisher bracket; 8. Cooling fan; 9. Cabinet; 10. Capacitor; 11. Release pipe; 12. Reactor; 13. Terminal pressure gauge; 14. Valve bracket; 15. Nozzle; 16. Thermistor; 17. Connecting bolts; 18. Release valve; 19. Release valve mounting hole; 20. Digital display; 21. Valve controller; 22. Adjustment button; 23. Battery box. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Reference Figure 1-5 The utility model discloses a capacitor cabinet equipped with a fire-fighting device, comprising a capacitor cabinet body, a fire-extinguishing mechanism installed outside the capacitor cabinet body, an actuator installed inside the capacitor cabinet body, and a detection mechanism installed outside the capacitor cabinet body.

[0031] The fire extinguishing mechanism includes a fire extinguishing agent container tank 1, the actuator includes a release valve 18, and the detection mechanism includes a thermal probe 16;

[0032] The fire extinguishing agent container tank 1 is connected to the release valve 18, and the thermal probe 16 is installed on the release valve 18 and electrically connected to the release valve 18. When in operation, once a fire occurs in the capacitor 10 and the reactor 12, the cooling fan 8 on the capacitor cabinet has little effect, but the thermal probe 16 can sensitively sense the temperature change. Once the surface temperature of the object exceeds the set action value of the thermal probe 16, the measurement data is transmitted to the valve controller 21 for PID measurement, and an analog signal is output. The release valve 18 is controlled by the analog signal to quickly open and release the fire extinguishing agent for fire extinguishing.

[0033] The actuator also includes a release pipe 11, which is made of a metal hose material with high flexibility, fire resistance, and recyclability. During installation, the release pipe 11 extends into the cabinet body 9 through the cable trench at the bottom of the cabinet or the side opening.

[0034] The release valve 18 is connected to the fire extinguishing agent container tank 1 through the release pipe 11, and the release valve 18 and the release pipe 11 are sealed by a connecting bolt 17. The fire extinguishing agent container tank 1 and the release pipe 11 are both filled with heptafluoropropane gas. When the release valve 18 is opened, the heptafluoropropane gas in the release pipe 11 can be directly released, reducing the delay in releasing the fire extinguishing agent, and at the same time, heptafluoropropane gas fire extinguishing agent is replenished from the fire extinguishing agent container tank 1 to the release pipe 11.

[0035] Heptafluoropropane gas is low in cost and meets the fire extinguishing requirements of the capacitor cabinet. In addition, the gas has a long service life and the fire extinguishing agent container tank 1 can be recycled.

[0036] A container valve 5 is installed on the fire extinguishing agent container tank 1, and the release valve 18 is connected to the fire extinguishing agent container tank 1 through the container valve 5. A pressure switch 3 and a pipeline pressure gauge 2 for detecting the internal pressure of the release pipe 11 are installed on the container valve 5. When the fire extinguishing agent in the release pipe 11 is released through the release valve 18, the pipeline pressure gauge 2 detects the pressure drop in the release pipe 11, sends a signal, and opens the container valve 5 through the pressure switch 3 to replenish the heptafluoropropane gas fire extinguishing agent from the fire extinguishing agent container tank 1 to the release pipe 11.

[0037] The actuator also includes an alarm 4, which is electrically connected to the pipeline pressure gauge 2. The pipeline pressure gauge 2 detects a decrease in pressure in the release pipe 11 and sends a signal. The alarm 4 sounds an alarm to remind nearby relevant personnel to deal with the fire.

[0038] The detection mechanism also includes a terminal pressure gauge 13 installed on the outside of the cabinet 9 for detecting the internal pressure of the release pipe 11. The release pipe 11 is extended outside the cabinet 9 and connected to the terminal pressure gauge 13. The terminal pressure gauge 13 is equipped with a signal transmitter. When the terminal pressure gauge 13 detects a pressure change in the release pipe 11, the signal transmitter sends a signal to the fire background host to indicate the fire location and further deal with the fire hazard.

[0039] The actuator also includes a valve controller 21, which is electrically connected to the terminal pressure gauge 13, the thermistor 16, and the release valve 18. The valve controller 21 is provided with a digital display screen 20, an adjustment button 22, and a battery box 23. The valve controller 21 can be installed on the cabinet door 9 or other control box. One controller can control multiple release valves at the same time. It is self-powered by batteries and does not require an additional power supply. The temperature action value is set by adjusting the button 22, and the real-time temperature inside the cabinet can be seen on the digital display screen 20.

[0040] The capacitor cabinet body includes a cabinet body 9 and a capacitor 10 and a reactor 12 arranged in the cabinet body 9. There are multiple release valves 18, and the multiple release valves 18 correspond one-to-one to the capacitors 10 and the reactors 12. The release tube 11 is arranged along the position of the capacitor 10 and the reactor 12. A valve bracket 14 is also installed near the capacitor 10 and the reactor 12. The release valve 18 is installed on the inner side of the cabinet body 9 through the valve bracket 14.

[0041] A release valve 18 is placed next to each protected capacitor 10 and reactor 12. A nozzle 15, a thermal probe 16, a connecting bolt 17, and a release valve mounting hole 19 are installed on the release valve 18. Bolts are installed in the release valve mounting hole 19 to fix the release valve 18 on the valve bracket 14. The position of the nozzle 15 is adjusted so that it faces the protected capacitor 10 or reactor 12.

[0042] Working principle: When in use, first install the fire extinguishing agent container tank 1 on the side of the cabinet 9 or on the wall close to the cabinet 9 through two fire extinguisher brackets 7 and fixing bolts 6. After installation and debugging are completed, turn on the pressure switch 3 to allow the fire extinguishing agent heptafluoropropane gas to fill the release pipe 11, and check that the pressure values displayed by the pipeline pressure gauge 2 and the terminal pressure gauge 13 are within the normal range.

[0043] In the operating state, once a fire occurs in the capacitor 10 or the reactor 12, the thermal probe 16 can sensitively sense the temperature change. Once the surface temperature of the object exceeds the set action value of the thermal probe 16, the measurement data is transmitted to the valve controller 21 for PID calculation, and an analog signal is output. The analog signal is used to control the release valve 18 to open quickly. The air pressure inside the release pipe 11 decreases due to the opening of the release valve 18. The pipeline pressure gauge 2 detects the pressure change inside the pipeline and reacts at the same time. The container valve 5 drives the fire extinguishing agent container tank 1 to quickly and accurately discharge HFC-227ea gas along the release pipe 11 through the release valve 18 and the nozzle 15 to the fire site, extinguishing the fire in its infancy. At the same time, the alarm 4 is activated to remind relevant personnel to deal with the fire. When the pressure inside the release pipe 11 changes, the terminal pressure gauge 13 detects the pressure change and can also transmit the alarm signal to the fire host through the signal generator to indicate the fire location and further deal with the fire hazard.

[0044] After the fire is extinguished, the temperature inside the cabinet 9 drops, and the thermistor 16 transmits the real-time temperature measurement value to the valve controller 21, which controls the release valve 18 to automatically close. When the pressure in the release pipe 11 returns to the normal range, the container valve 5 automatically closes.

[0045] Once a fire occurs in the components of the capacitor cabinet, the device can directly treat the fire point in the enclosed space of the cabinet body 9 to prevent the fire from further expanding. This not only effectively controls the scope of the fire, but also protects other low-voltage cabinets from loss.

[0046] The system of the utility model is simple and low in cost. It does not require an external power supply and complex electric control equipment and pipelines. It has a quick response and can accurately perform point-to-point protection, standardize the protection area, reduce the amount of fire extinguishing agent used, and reduce the cost of fire fighting. It uses heptafluoropropane gas, which is safe and environmentally friendly. The fire extinguishing agent is released inside the capacitor cabinet, which can also provide certain protection for on-site personnel.

[0047] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0049] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A capacitor cabinet equipped with a fire protection device, characterized in that: It includes a capacitor cabinet body, a fire extinguishing mechanism installed outside the capacitor cabinet body, an actuator installed inside the capacitor cabinet body, and a detection mechanism installed outside the capacitor cabinet body; The fire extinguishing mechanism includes a fire extinguishing agent container tank (1), the actuator includes a release valve (18), and the detection mechanism includes a thermal probe (16); The fire extinguishing agent container tank (1) is communicated with a release valve (18), and the thermal probe (16) is mounted on the release valve (18) and electrically connected to the release valve (18).

2. A capacitor cabinet equipped with a fire protection device according to claim 1, characterized in that: The actuator further includes a release pipe (11), and the release valve (18) is connected to the fire extinguishing agent container tank (1) through the release pipe (11); The fire extinguishing agent container tank (1) and the release tube (11) are both filled with heptafluoropropane gas.

3. The capacitor cabinet equipped with a fire protection device according to claim 2, characterized in that: The fire extinguishing agent container tank (1) is provided with a container valve (5), the release valve (18) is connected to the fire extinguishing agent container tank (1) via the container valve (5), and the container valve (5) is provided with a pressure switch (3) and a pipeline pressure gauge (2) for detecting the internal pressure of the release pipe (11).

4. The capacitor cabinet equipped with a fire protection device according to claim 3, characterized in that: The actuator further comprises an alarm (4), and the alarm (4) is electrically connected to the pipeline pressure gauge (2).

5. The capacitor cabinet equipped with a fire protection device according to claim 1, characterized in that: The detection mechanism further includes a terminal pressure gauge (13) installed outside the cabinet (9) for detecting the internal pressure of the release pipe (11).

6. The capacitor cabinet equipped with a fire protection device according to claim 5, characterized in that: The actuator further comprises a valve controller (21), wherein the valve controller (21) is electrically connected to the terminal pressure gauge (13), the thermal probe (16), and the release valve (18).

7. The capacitor cabinet equipped with a fire protection device according to claim 1, characterized in that: The capacitor cabinet body includes a cabinet body (9) and a capacitor (10) and a reactor (12) arranged in the cabinet body (9). There are multiple release valves (18), and the multiple release valves (18) correspond one to one with the capacitor (10) and the reactor (12).

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