Automatic fire-fighting device for electrical cabinet

Abstract

The utility model relates to an electrical cabinet automatic fire-fighting device, and relates to the field of electrical cabinet fire-fighting technology, and the device comprises a fire-catching detection assembly which is used for outputting a fire-catching induction signal when internal components or circuits and other structures of an electrical cabinet are on fire; the heating assembly is fixedly mounted in the cabinet body, is in signal connection with the signal output end of the ignition detection assembly and is used for receiving the ignition induction signal and heating; and the temperature sensing fire extinguishing paste is detachably mounted at the heating end of the heating assembly and used for sensing the temperature and releasing nitrogen, carbon dioxide gas and fire extinguishing microparticles into the cabinet body. According to the invention, fire extinguishing operation can be carried out on an ignition point in the electrical cabinet in time when a fire breaks out in the electrical cabinet.

Description

Technical Field

[0001] This application relates to the field of electrical cabinet fire protection technology, and in particular to an automatic fire protection device for electrical cabinets. Background Art

[0002] An electrical cabinet is a cabinet made of steel materials to protect components from normal operation. It is mainly applied in the chemical industry, power system, metallurgical system, industry, nuclear power industry, fire safety monitoring, and transportation industry, etc. During the actual operation of the electrical cabinet, it may catch fire due to circuit overload. The fire inside the electrical cabinet will not only damage the equipment but also affect production.

[0003] In the prior art, in order to facilitate firefighters to take fire extinguishing measures in time when the electrical cabinet catches fire, fire extinguishers are often placed in the machine room where the electrical cabinet is assembled, and temperature sensors, smoke sensors, etc. are installed inside the machine room or the electrical cabinet to monitor the electrical cabinet. Once the electrical cabinet catches fire and causes high temperature and smoke, the firefighters can open the electrical cabinet and use the fire extinguisher to extinguish the fire point inside the electrical cabinet.

[0004] However, the operation of the operator opening the electrical cabinet to extinguish the fire point inside the electrical cabinet has a risk of electric shock, and it is also difficult to extinguish the fire point inside the electrical cabinet from the outside of the electrical cabinet, which has a large potential safety hazard and needs to be improved urgently. Utility Model Content

[0005] In order to extinguish the fire point in time when a fire breaks out inside the electrical cabinet, this application provides an automatic fire protection device for electrical cabinets.

[0006] The automatic fire protection device for electrical cabinets provided by this application adopts the following technical solutions:

[0007] An automatic fire protection device for electrical cabinets, comprising:

[0008] A fire detection component, configured to output a fire induction signal when components or line structures inside the electrical cabinet catch fire;

[0009] A heating component, fixedly installed inside the cabinet, signal-connected to the signal output end of the fire detection component, and configured to receive the fire induction signal and generate heat;

[0010] A temperature-sensitive fire extinguishing patch, detachably installed at the heat-generating end of the heating component, and configured to sense temperature and release nitrogen, carbon dioxide gas, and fire extinguishing microparticles into the cabinet.

[0011] By adopting the above technical solution, when an electronic component or circuit in the electrical cabinet catches fire, the fire detection component senses the fire and outputs a fire induction signal. After receiving the fire induction signal, the heating component generates heat. The temperature-sensitive fire extinguishing patch on the heating component senses the rising temperature and releases nitrogen and carbon dioxide gases, causing the oxygen content inside the electrical cabinet to decrease and reducing the spread of the fire. At the same time, the fire extinguishing microparticles released by the temperature-sensitive fire extinguishing patch undergo physical endothermic processes such as melting and gasification, absorbing a large amount of heat at high temperatures, significantly reducing the temperature of the flame, and then radiating to the combustion surface of the combustible material to gasify the combustible molecules, achieving the effect of extinguishing the fire. By detecting the ignition point inside the cabinet of the electrical cabinet through the fire detection component and controlling the heating component to control the temperature-sensitive fire extinguishing patch, the time required for the temperature-sensitive fire extinguishing patch to be triggered can be shortened. When a fire breaks out inside the electrical cabinet and the fire is small, the ignition point can be extinguished, effectively improving the fire extinguishing effect while reducing the adverse effects caused by the spread of the fire.

[0012] Preferably, the fire detection component includes:

[0013] A temperature sensor, fixedly installed inside the cabinet, with the sensing end facing the components in the electrical cabinet that are prone to catching fire, for sensing the temperature inside the cabinet and outputting an in-cabinet temperature signal;

[0014] A comparator chip, signal-connected to the signal output end of the temperature sensor, for receiving the in-cabinet temperature signal, comparing it, and outputting a first high-level signal when the in-cabinet temperature is higher than the set temperature value;

[0015] A smoke sensor, fixedly installed inside the cabinet, for outputting a second high-level signal when smoke appears inside the cabinet;

[0016] An AND gate chip, with its signal input ends signal-connected to the signal output ends of the comparator chip and the smoke sensor, for receiving the first high-level signal and the second high-level signal and outputting the fire induction signal.

[0017] By adopting the above technical solution, when an electronic component or circuit in the electrical cabinet catches fire, causing the temperature inside the cabinet to be too high and smoke to appear inside the cabinet, the temperature value sensed by the temperature sensor is too high, the comparator chip outputs a first high-level signal, the smoke sensor senses the smoke generated by combustion and outputs a second high-level signal, and the AND gate chip simultaneously receives the first high-level signal and the second high-level signal, which can determine that a fire has occurred inside the cabinet of the electrical cabinet and control the heating component to generate heat so that the temperature-sensitive fire extinguishing patch releases nitrogen, carbon dioxide gases, and fire extinguishing microparticles into the cabinet of the electrical cabinet.

[0018] Preferably, the heating component includes a mounting seat, the mounting seat is fixedly installed on the inner side wall of the cabinet, and an installation groove adapted to the temperature-sensitive fire extinguishing patch is formed on the mounting seat;

[0019] An electric heating plate is fixedly installed on the inner groove wall of the installation groove. The electric heating plate is in contact with the temperature-sensitive fire extinguishing patch, and the signal input end of the electric heating plate is signal-connected to the signal output end of the AND gate chip.

[0020] By adopting the above technical solution, when a fire breaks out inside the electrical cabinet, the AND gate chip controls the heating component to generate heat, which can control the temperature-sensitive fire extinguishing patch to release nitrogen, carbon dioxide gas and fire extinguishing microparticles in a timely manner.

[0021] Preferably, a graphene heat dissipation film is fixedly installed on the surface of the electric heating plate, and the graphene heat dissipation film is located between the electric heating plate and the temperature-sensitive fire extinguishing patch.

[0022] By adopting the above technical solution, the graphene heat dissipation film can equalize the heat generated by the electric heating plate, ensuring the uniformity of the temperature induction of the temperature-sensitive fire extinguishing patch and the release of nitrogen, carbon dioxide gas and fire extinguishing microparticles.

[0023] Preferably, the temperature-sensitive fire extinguishing patch includes a fire extinguishing patch housing and a fire extinguishing patch body. The fire extinguishing patch body is fixedly installed in the fire extinguishing patch housing. One side of the fire extinguishing patch housing is detachably connected to the inner groove wall of the installation groove, and a plurality of air holes for releasing nitrogen, carbon dioxide gas and fire extinguishing microparticles are opened on the side wall of the fire extinguishing patch housing away from the installation groove.

[0024] By adopting the above technical solution, through the air holes on the fire extinguishing patch housing, when the fire extinguishing patch body is heated and releases nitrogen, carbon dioxide gas and fire extinguishing microparticles, the nitrogen, carbon dioxide gas and fire extinguishing microparticles can be released into the electrical cabinet through the air holes.

[0025] Preferably, a connecting plate is fixedly connected to the side wall of the fire extinguishing patch housing. Limiting plates extend inward and are integrally formed on the groove walls on both sides of the installation groove. The connecting plate is limited between the inner groove wall of the installation groove and the two limiting plates;

[0026] A plurality of connecting holes are penetrated through the connecting plate, and a plurality of installation screw holes coaxial with the connecting holes are opened on the inner groove wall of the installation groove.

[0027] By adopting the above technical solution, when an operator installs the temperature-sensitive fire extinguishing patch, the connecting plate can be slid into the groove between the two limiting plates and the inner groove wall of the installation groove to pre-position the temperature-sensitive fire extinguishing patch. And because the connecting plate is provided with connecting holes and the inner groove wall of the installation groove is provided with installation screw holes, the operator can fix the connecting plate in the installation groove with screws without holding the connecting plate by hand, which can improve the convenience of the operator installing the temperature-sensitive fire extinguishing patch.

[0028] In summary, an automatic fire-fighting device for an electrical cabinet according to the present application includes at least one of the following beneficial technical effects:

[0029] 1. Through the mutual cooperation and use of a temperature sensor, a comparator chip, a smoke sensor, an AND gate chip, an electric heating plate, and a heat-sensitive fire extinguishing patch, when the temperature rises and smoke is generated due to a fire in the electrical cabinet, the AND gate chip controls the electric heating plate to generate heat to trigger the heat-sensitive fire extinguishing patch. The heat-sensitive fire extinguishing patch releases nitrogen, carbon dioxide, and fire extinguishing microparticles when heated. The nitrogen and carbon dioxide fill the interior of the electrical cabinet, effectively reducing the oxygen content inside the cabinet. At the same time, the fire extinguishing microparticles undergo physical endothermic processes such as melting and gasification, absorbing a large amount of heat at high temperatures, significantly reducing the temperature of the flame, and then radiating to the combustion surface of the combustible to gasify the combustible molecules, achieving the effect of extinguishing the fire;

[0030] 2. Through the mutual cooperation and use of a temperature sensor, a smoke sensor, an AND gate chip, and an electric heating plate, the heat-sensitive fire extinguishing patch can be heated and triggered when the fire is small and the temperature inside the cabinet has not risen to trigger the heat-sensitive fire extinguishing patch, and the heat-sensitive fire extinguishing patch can be triggered in the case of a relatively low external environmental temperature and a relatively hidden ignition point inside the cabinet, improving the fire extinguishing sensitivity of the heat-sensitive fire extinguishing patch and ensuring the fire extinguishing effect of the heat-sensitive fire extinguishing patch;

[0031] 3. The mounting seat facilitates the operator to install the heat-sensitive fire extinguishing patch, improving the convenience of the operator to install the heat-sensitive fire extinguishing patch. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram showing the overall structure of the fire-fighting device inside the electrical cabinet in an embodiment of the present application.

[0033] Figure 2 is a schematic diagram showing the overall structure of the heat-sensitive fire extinguishing patch in an embodiment of the present application.

[0034] Figure 3 is a schematic diagram showing the connection relationship between the mounting seat and the heat-sensitive fire extinguishing patch in an embodiment of the present application.

[0035] Figure 4 is a schematic diagram showing the internal signal transmission of the fire-fighting device in an embodiment of the present application.

[0036] Description of the reference numerals: 1, fire detection component; 11, temperature sensor; 12, smoke sensor; 2, heating component; 21, mounting seat; 211, mounting groove; 212, limiting plate; 22, electric heating plate; 23, graphene heat dissipation film; 3, heat-sensitive fire extinguishing patch; 31, fire extinguishing patch housing; 311, ventilation hole; 312, connecting plate; 313, connecting hole; 32, fire extinguishing patch body; 4, electrical cabinet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The following is combined with the attachedFigures 1-4 Further details of this application are provided below.

[0038] Embodiment

[0039] An embodiment of this application discloses an automatic fire extinguishing device for an electrical cabinet. Refer to Figure 1 and Figure 4 , which mainly includes a fire detection component 1 for outputting a fire induction signal when components or circuit structures inside the electrical cabinet 4 catch fire; a heating component 2 fixedly installed inside the cabinet and signal-connected to the signal output end of the fire detection component 1 for receiving the fire induction signal and generating heat; and a temperature-sensitive fire extinguishing patch 3 detachably installed at the heat-generating end of the heating component 2 for sensing the temperature and releasing nitrogen, carbon dioxide gas, and fire extinguishing microparticles into the cabinet.

[0040] When an electronic component or circuit in the electrical cabinet 4 catches fire, the fire detection component 1 senses the fire and outputs a fire induction signal. After receiving the fire induction signal, the heating component 2 generates heat. The temperature-sensitive fire extinguishing patch 3 on the heating component senses the rising temperature and releases nitrogen and carbon dioxide gas, causing the oxygen content inside the electrical cabinet 4 to decrease and reducing the spread of the fire. At the same time, the fire extinguishing microparticles released by the temperature-sensitive fire extinguishing patch 3 undergo physical endothermic processes such as melting and gasification, absorbing a large amount of heat at high temperatures, significantly reducing the temperature of the flame, and then radiating to the combustion surface of the combustible material to gasify the combustible molecules, achieving the effect of extinguishing the fire.

[0041] By using the fire detection component 1 to detect the ignition point inside the cabinet of the electrical cabinet 4 and controlling the heating component 2 to control the temperature-sensitive fire extinguishing patch 3, the time required for the temperature-sensitive fire extinguishing patch 3 to be triggered can be shortened. Fire extinguishing treatment can be carried out on the ignition point when a fire breaks out inside the electrical cabinet 4 and the fire is small. While effectively improving the fire extinguishing effect, the adverse effects caused by the spread of the fire can be reduced.

[0042] Refer to Figure 1 , the fire detection component 1 includes: a temperature sensor 11 fixedly installed inside the cabinet with its sensing end facing the components in the electrical cabinet 4 that are prone to catching fire, for sensing the temperature inside the cabinet and outputting an in-cabinet temperature signal; a comparator chip signal-connected to the signal output end of the temperature sensor 11 for receiving the in-cabinet temperature signal, comparing it, and outputting a first high-level signal when the in-cabinet temperature is higher than the set temperature value; a smoke sensor 12 fixedly installed inside the cabinet for outputting a second high-level signal when smoke appears inside the cabinet; and an AND gate chip with its signal input terminals signal-connected to the signal output ends of the comparator chip and the smoke sensor 12 for receiving the first high-level signal and the second high-level signal and outputting a fire induction signal.

[0043] When the electronic components or circuits in the electrical cabinet 4 catch fire, causing the temperature inside the cabinet to be too high and smoke to appear inside the cabinet, the temperature sensor 11 senses an excessively high temperature value, the comparator chip outputs a first high-level signal, the smoke sensor 12 outputs a second high-level signal after sensing the smoke generated by combustion, and the AND gate chip simultaneously receives the first high-level signal and the second high-level signal to determine that there is a fire inside the electrical cabinet 4 and controls the heating component 2 to generate heat so that the temperature-sensitive fire extinguishing patch 3 releases nitrogen, carbon dioxide gas, and fire extinguishing microparticles into the electrical cabinet 4.

[0044] Refer to Figure 2 And Figure 3 , the heating component 2 includes a mounting base 21, the mounting base 21 is fixedly installed on the inner side wall of the cabinet body, and a mounting groove 211 adapted to the temperature-sensitive fire extinguishing patch 3 is formed on the mounting base 21; an electric heating plate 22 is fixedly installed on the inner groove wall of the mounting groove 211, the electric heating plate 22 is in contact with the temperature-sensitive fire extinguishing patch 3, and the signal input end of the electric heating plate 22 is signal-connected to the signal output end of the AND gate chip.

[0045] When there is a fire inside the electrical cabinet 4, the AND gate chip controls the heating component 2 to generate heat, and can control the temperature-sensitive fire extinguishing patch 3 to release nitrogen, carbon dioxide gas, and fire extinguishing microparticles in a timely manner.

[0046] Refer to Figure 3 , a graphene heat dissipation film 23 is fixedly installed on the surface of the electric heating plate 22, and the graphene heat dissipation film 23 is located between the electric heating plate 22 and the temperature-sensitive fire extinguishing patch 3.

[0047] The graphene heat dissipation film 23 can equalize the heat generated by the electric heating plate 22, and ensure the uniformity of the temperature sensed by the temperature-sensitive fire extinguishing patch 3 and the release of nitrogen, carbon dioxide gas, and fire extinguishing microparticles.

[0048] Refer to Figure 2 And Figure 3 , the temperature-sensitive fire extinguishing patch 3 includes a fire extinguishing patch housing 31 and a fire extinguishing patch body 32, the fire extinguishing patch body 32 is fixedly installed inside the fire extinguishing patch housing 31, one side of the fire extinguishing patch housing 31 is detachably connected to the inner groove wall of the mounting groove 211, and a plurality of air holes 311 for releasing nitrogen, carbon dioxide gas, and fire extinguishing microparticles are formed on the side wall of the fire extinguishing patch housing 31 away from the mounting groove 211.

[0049] Through the air holes 311 on the fire extinguishing patch housing 31, when the fire extinguishing patch body 32 is heated to release nitrogen, carbon dioxide gas, and fire extinguishing microparticles, the nitrogen, carbon dioxide gas, and fire extinguishing microparticles can be released into the electrical cabinet 4 through the air holes 311.

[0050] Refer to Figure 2 And Figure 3, a connecting plate 312 is fixedly connected to the side wall of the fire extinguishing patch housing 31. Limiting plates 212 extend inwardly and are integrally formed on the two side walls of the installation groove 211. The connecting plate 312 is limited between the inner groove wall of the installation groove 211 and the two limiting plates 212; a plurality of connecting holes 313 are formed through the connecting plate 312, and a plurality of installation screw holes coaxial with the connecting holes 313 are formed on the inner groove wall of the installation groove 211.

[0051] When an operator installs the temperature-sensitive fire extinguishing patch 3, the connecting plate 312 can be slid into the groove between the two limiting plates 212 and the inner groove wall of the installation groove 211, so as to pre-position the temperature-sensitive fire extinguishing patch 3. And because the connecting plate 312 is provided with connecting holes 313 and the inner groove wall of the installation groove 211 is provided with installation screw holes, the operator can fix the connecting plate 312 in the installation groove 211 by screws without holding the connecting plate 312 by hand, which can improve the convenience of the operator installing the temperature-sensitive fire extinguishing patch 3.

[0052] The implementation principle of an automatic fire-fighting device for an electrical cabinet in an embodiment of the present application is as follows: through the mutual cooperation and use of the temperature sensor 11, the comparator chip, the smoke sensor 12, the AND gate chip, the heating plate 22, and the temperature-sensitive fire extinguishing patch 3, when the temperature rises and smoke is generated due to a fire in the electrical cabinet 4, the AND gate chip controls the heating plate 22 to heat up to trigger the temperature-sensitive fire extinguishing patch 3. The temperature-sensitive fire extinguishing patch 3 releases nitrogen, carbon dioxide, and fire extinguishing microparticles when heated. Nitrogen and carbon dioxide fill the interior of the electrical cabinet 4, which can effectively reduce the oxygen content inside the cabinet. At the same time, the fire extinguishing microparticles undergo physical endothermic processes such as melting and gasification, absorbing a large amount of heat at high temperatures, greatly reducing the temperature of the flame, and then radiating to the combustible surface of the combustible to vaporize the combustible molecules, achieving the effect of extinguishing the fire; through the mutual cooperation and use of the temperature sensor 11, the smoke sensor 12, the AND gate chip, and the heating plate 22, the temperature-sensitive fire extinguishing patch 3 can be heated and triggered when the fire is small and the temperature inside the cabinet has not risen to trigger the temperature-sensitive fire extinguishing patch 3, and the temperature-sensitive fire extinguishing patch 3 can be triggered when the external ambient temperature is low and the ignition point inside the cabinet is relatively hidden, improving the fire extinguishing sensitivity of the temperature-sensitive fire extinguishing patch 3 and ensuring the fire extinguishing effect of the temperature-sensitive fire extinguishing patch 3.

[0053] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An automatic fire-fighting device for an electrical cabinet, characterized in that, Including: A fire detection component (1) for outputting a fire induction signal when components or circuit structures inside the electrical cabinet (4) catch fire; A heating component (2) fixedly installed inside the cabinet, signal-connected to the signal output end of the fire detection component (1), for receiving the fire induction signal and generating heat; A temperature-sensitive fire extinguishing patch (3) detachably installed at the heat-generating end of the heating component (2), for sensing temperature and releasing nitrogen, carbon dioxide gas, and fire extinguishing microparticles into the cabinet; The heating component (2) includes a mounting base (21), the mounting base (21) is fixedly installed on the inner side wall of the cabinet, and a mounting groove (211) adapted to the temperature-sensitive fire extinguishing patch (3) is formed on the mounting base (21); An electric heating plate (22) is fixedly installed on the inner groove wall of the mounting groove (211), the electric heating plate (22) is in contact with the temperature-sensitive fire extinguishing patch (3), and the signal input end of the electric heating plate (22) is signal-connected to the signal output end of the fire detection component (1); The temperature-sensitive fire extinguishing patch (3) includes a fire extinguishing patch housing (31) and a fire extinguishing patch body (32), the fire extinguishing patch body (32) is fixedly installed inside the fire extinguishing patch housing (31), one side of the fire extinguishing patch housing (31) is detachably connected to the inner groove wall of the mounting groove (211), a plurality of air holes (311) for releasing nitrogen, carbon dioxide gas, and fire extinguishing microparticles are formed on the side wall of the fire extinguishing patch housing (31) away from the mounting groove (211), a connecting plate (312) is fixedly connected to the side wall of the fire extinguishing patch housing (31), and limiting plates (212) extend inward and are integrally formed on the groove walls on both sides of the mounting groove (211), and the connecting plate (312) is limited between the inner groove wall of the mounting groove (211) and the two limiting plates (212); A plurality of connection holes (313) are formed through the connecting plate (312), and a plurality of mounting screw holes coaxial with the connection holes (313) are formed on the inner groove wall of the mounting groove (211).

2. The automatic fire extinguishing device for an electrical cabinet according to claim 1, wherein The fire detection component (1) includes: A temperature sensor (11) fixedly installed inside the cabinet, with the sensing end facing the components prone to catching fire inside the electrical cabinet (4), for sensing the temperature inside the cabinet and outputting an in-cabinet temperature signal; A comparator chip, signal-connected to the signal output end of the temperature sensor (11), for receiving the in-cabinet temperature signal, comparing it, and outputting a first high-level signal when the in-cabinet temperature is higher than the set temperature value; A smoke sensor (12) fixedly installed inside the cabinet, for outputting a second high-level signal when smoke appears inside the cabinet; An AND gate chip, with its signal input ends signal-connected to the signal output ends of the comparator chip and the smoke sensor (12), for receiving the first high-level signal and the second high-level signal and outputting the fire induction signal.

3. An automatic fire protection device for an electrical cabinet according to claim 2, wherein, A graphene heat dissipation film (23) is fixedly installed on the surface of the electric heating plate (22), and the graphene heat dissipation film (23) is located between the electric heating plate (22) and the temperature-sensitive fire extinguishing patch (3).

Images