Automatic fire extinguishing device for power distribution cabinet

Abstract

The utility model provides an automatic fire extinguishing device for a power distribution cabinet, which comprises a shell, a first cavity, a second cavity communicated with the first cavity and an air outlet communicated with the second cavity are arranged in the shell, the first cavity is provided with hot aerosol, and the second cavity is provided with cold aerosol; and the starting wire passes through the second cavity from the first cavity and is exposed out of the shell. The device has the advantages of being safe, reliable and capable of effectively cooling a hot aerosol spraying medium and improving the fire extinguishing effect at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of fire fighting equipment, concretely relates to a power distribution cabinet automatic fire extinguishing device. BACKGROUND

[0002] The existing hot gas aerosol fire extinguishing principle is through solid phase oxidation-reduction reaction, forms the dense gas aerosol smoke composed of N, a small amount of CO, H2O and carbonate, metal oxide, rapidly fills the space, uses the gas phase composition dilution, oxygen isolation effect and heat absorption decomposition cooling effect and chemical inhibition effect to extinguish the flame.

[0003] The hot gas aerosol is generated by high-temperature combustion reaction, and the reaction process is all exothermic reaction. The hot aerosol smoke needs to be cooled before being released to the protection space for fire extinguishing. If not cooled or the cooling technology is unreasonable, the high-temperature flame and residue in the combustion reaction will be accompanied by the aerosol from the generator to the outside, which is easy to cause secondary fire in the protection area. Therefore, effective cooling technology is the key to improve the fire extinguishing efficiency and avoid secondary fire accidents. There are three ways to cool the hot gas aerosol, physical cooling, chemical external cooling and chemical internal cooling. Physical cooling is to use some materials with large heat capacity, or to set baffles and labyrinth flow channels in the device to remove residual sparks and cool down. This method only distributes heat evenly, has a cooling effect in the initial stage of spraying, and loses effect after temperature balance, which cannot fundamentally solve the problem. Chemical internal cooling is to add a cooling agent or a material that can easily absorb heat and decompose gasification in the reaction agent to reduce the reaction temperature, but this scheme will affect the stability and reaction speed of the oxidation-reduction reaction. CONTENT OF THE UTILITY MODEL

[0004] Based on the above problems, the utility model aims at providing a safe and reliable power distribution cabinet automatic fire extinguishing device which can effectively cool the hot gas aerosol spraying medium and improve the fire extinguishing effect.

[0005] In view of the above problems, the following technical scheme is provided: a power distribution cabinet automatic fire extinguishing device, comprising a shell, a first cavity is arranged in the shell, a second cavity communicated with the first cavity, a gas outlet communicated with the second cavity, the first cavity is provided with a hot gas aerosol, and the second cavity is provided with a cold gas aerosol; further comprising a starting line, the starting line is from the first cavity, passes through the second cavity and is exposed to the shell.

[0006] The utility model is further provided as follows: the second cavity and the gas outlet are both two groups, and are symmetrically distributed on both sides of the first cavity; the starting line is from the first cavity, respectively passes through the two second cavities and is exposed to the shell.

[0007] The utility model further sets up, two groups of second cavity and gas outlet and exposed starting line are arranged on the shell up and down or left and right or front and back.

[0008] The utility model further sets up, still include with second cavity intercommunication's third cavity, gas outlet passes through third cavity with second cavity intercommunication, third cavity is equipped with heat absorption medium, starting line is from first cavity in proper order through second cavity, third cavity and exposes in shell.

[0009] The utility model further sets up, heat absorption medium is ceramic particle.

[0010] The utility model further sets up, second cavity and third cavity are connected through cooling groove.

[0011] The utility model further sets up, the shell includes main part and side cover, the shell contour is same with circuit breaker or air switch contour, the shell bottom is equipped with guide rail groove and locking piece.

[0012] The utility model further sets up, the shell is flame -retardant nylon material.

[0013] The utility model further sets up, starting line is heat sensitive wire or / and electronic ignition head.

[0014] The utility model further sets up, still include the detection head of installation in first cavity.

[0015] The utility model has the advantages of:

[0016] 1, starting line is used for igniting hot gas aerosol, and the spray medium produced by hot gas aerosol is cooled by cold gas aerosol, and at the same time, the spray medium produced by cold gas aerosol is also sprayed from the gas outlet, so that the cooling effect is improved, the fire extinguishing area / range is improved, and the occurrence of secondary fire accidents is avoided without reducing the stability and reaction speed of the oxidation-reduction reaction.

[0017] 2, spray medium can be sprayed in two directions, and the coverage range is improved.

[0018] 3, cold gas aerosol absorbs the temperature of hot gas aerosol spray medium, and itself generates spray medium, and after mixing, the spray medium is further cooled by the heat absorption medium of third cavity, so that the temperature of the gas outlet can be as low as possible.

[0019] 4, ceramic particles absorb heat and generate labyrinth effect to block residual sparks.

[0020] 5, the overall shape is consistent with the shape of the circuit breaker or air switch when installed in the power distribution cabinet, effectively ensuring the arrangement of the overall space volume.

[0021] 6. The shell is made of flame-retardant nylon, which can effectively prevent spontaneous combustion caused by excessive temperature when the hot aerosol is sprayed.

[0022] 7. The thermal wire is a physical temperature-activated probe. It is ignited when the ambient temperature reaches a certain threshold or when it comes into contact with an open flame, and it also ignites the thermal aerosol. It is suitable for conventional environments or environments with high magnetic field requirements, avoiding false triggering of the electronic ignition head. The electronic ignition head can be used for remote ignition. It can also be used for remote monitoring when used with the detection head. Attached Figure Description

[0023] Figure 1 This is a first-view three-dimensional structural diagram of the present invention.

[0024] Figure 2 This is a second-view three-dimensional structural diagram of the present invention.

[0025] Figure 3 This is a schematic diagram of the internal three-dimensional structure of this utility model.

[0026] Figure 4 This utility model Figure 3 The front view.

[0027] Figure 5 This is a schematic diagram of the exploded three-dimensional structure of this utility model.

[0028] Figure 6 This is a three-dimensional structural diagram of the internal structure of the shell of this utility model.

[0029] Figure 7 This utility model Figure 6 The front view.

[0030] The labels in the diagram mean: 10-shell; 101-main body; 102-side cover; 103-guide rail groove; 104-locking piece; 11-first cavity; 12-second cavity; 13-air outlet; 14-third cavity; 15-cooling tank; 20-hot aerosol; 30-cold aerosol; 40-starting line; 50-heat absorbing medium. Detailed Implementation

[0031] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0032] refer to Figures 1 to 7 ,like Figures 1 to 7The illustrated power distribution cabinet automatic fire extinguishing device, including the shell 10, the first cavity 11 is equipped with in the shell 10, with the second cavity 12 that first cavity 11 communicates, with the second cavity 12 communicates the gas outlet 13, the first cavity 11 is equipped with hot aerosol 20, the second cavity 12 is equipped with cold aerosol 30;Still including starting line 40, the starting line 40 from first cavity 11 through second cavity 12 and expose in shell 10.

[0033] In the above structure, the starting line 40 is used to ignite the hot aerosol 20, and the spray medium generated by the hot aerosol 20 is cooled by the cold aerosol 30, and at the same time, the cold aerosol 30 also generates spray medium and is sprayed from the gas outlet 13, so that the cooling and the fire extinguishing effect are improved, and the fire extinguishing area / range is increased, so that the occurrence of secondary fire accidents is avoided without reducing the stability and reaction speed of the redox reaction.

[0034] In the embodiment, the second cavity 12 and the gas outlet 13 are both two groups, symmetrically distributed on both sides of the first cavity 11;The starting line 40 from the first cavity 11 passes through the two second cavities 12 respectively and is exposed to the shell 10.

[0035] In the above structure, the spray medium can be sprayed in two directions, and the coverage range is improved.

[0036] In the embodiment, the two groups of second cavities 12 and gas outlets 13 and exposed starting lines 40 are arranged on the shell 10 in an up-down or left-right or front-back manner.

[0037] In the above structure, the gas outlet 13 is oriented according to the installation position.

[0038] In the embodiment, it also includes a third cavity 14 in communication with the second cavity 12, and the gas outlet 13 communicates with the second cavity 12 through the third cavity 14;The third cavity 14 is provided with heat-absorbing medium 50;The starting line 40 from the first cavity 11 passes through the second cavity 12, the third cavity 14 in turn and is exposed to the shell 10.

[0039] In the above structure, the cold aerosol 30 absorbs the temperature of the spray medium of the hot aerosol 20 while generating spray medium itself, and the mixture is further cooled by the heat-absorbing medium 50 of the third cavity 14 to ensure that the temperature of the gas outlet 13 is as low as possible.

[0040] In the embodiment, the heat-absorbing medium 50 is ceramic particles.

[0041] In the above structure, the ceramic particles absorb heat while generating a labyrinth effect to block residual sparks.

[0042] In the embodiment, the second cavity 12 and the third cavity 14 are connected by a cooling groove 15.

[0043] In the structure, the cooling groove 15 is used for isolating the ceramic particles and the cold aerosol 30 particles, and the cooling groove 15 can be provided with a plurality of cooling grooves.

[0044] In the embodiment, the shell 10 comprises a main body 101 and a side cover 102; the shell 10 has the same profile as the circuit breaker or the air switch; the bottom of the shell 10 is provided with a guide rail groove 103 and a locking piece 104.

[0045] In the structure, the shell 10 is guaranteed to be installed in the power distribution cabinet and has the same shape as the circuit breaker or the air switch; the guide rail groove 103 and the locking piece 104 are used for adapting and clamping with the guide rail in the power distribution box.

[0046] In the embodiment, the shell 10 is made of flame-retardant nylon material.

[0047] In the structure, the occurrence of spontaneous combustion of the shell 10 caused by excessively high temperature when the hot aerosol 20 is sprayed can be effectively avoided.

[0048] In the embodiment, the starting wire 40 is a thermosensitive wire or / and an electronic ignition head (which is an optional component and not shown in the figure).

[0049] In the structure, the thermosensitive wire is a physical temperature starting probe, which is ignited when the ambient temperature reaches a certain threshold value or when it is in contact with an open flame, and ignites the hot aerosol 20, which is suitable for conventional or high-magnetic-field environments, and avoids false triggering of the electronic ignition head (which is an optional component and not shown in the figure); the electronic ignition head (which is an optional component and not shown in the figure) can be remotely ignited.

[0050] In the embodiment, the detection head (which is an optional component and not shown in the figure) is also installed in the first cavity 11.

[0051] In the structure, the detection head (which is an optional component and not shown in the figure) is used for detecting temperature to determine whether a fire occurs.

[0052] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and the above-mentioned improvements and modifications are also regarded as the protection range of the present application.

Claims

1. An automatic fire extinguishing device for an electrical distribution cabinet comprising a housing, characterized in that: The shell is internally provided with a first cavity, a second cavity communicated with the first cavity, and an air outlet communicated with the second cavity, the first cavity is provided with a hot aerosol, and the second cavity is provided with a cold aerosol; the shell is further provided with a starting wire which is exposed to the shell and passes through the first cavity and the second cavity.

2. The power distribution cabinet automatic fire extinguishing device according to claim 1, characterized in that: The second cavity and the air outlet are both in two groups and symmetrically distributed on two sides of the first cavity; the starting wire passes through the two second cavities and is exposed to the shell.

3. The power distribution cabinet automatic fire extinguishing device according to claim 2, characterized in that: The two groups of second cavities, air outlets and exposed starting wires are arranged in up and down, left and right or front and back on the shell.

4. The automatic fire extinguishing device for power distribution cabinet according to claim 1 or 2 or 3, characterized in that: The shell is further provided with a third cavity communicated with the second cavity, the air outlet is communicated with the second cavity through the third cavity, the third cavity is provided with a heat absorbing medium, and the starting wire is exposed to the shell and sequentially passes through the second cavity and the third cavity from the first cavity.

5. The power distribution cabinet automatic fire extinguishing device according to claim 4, characterized in that: The heat absorbing medium is ceramic particles.

6. The power distribution cabinet automatic fire extinguishing device according to claim 4, characterized in that: The second cavity and the third cavity are connected through a cooling groove.

7. The power distribution cabinet automatic fire extinguishing device according to claim 1, characterized in that: The shell comprises a main body and a side cover, the shell profile is the same as that of a circuit breaker or an air switch, the bottom of the shell is provided with a guide rail groove and a locking piece.

8. The power distribution cabinet automatic fire extinguishing device according to claim 1 or 7, characterized in that: The shell is made of flame-retardant nylon material.

9. The power distribution cabinet automatic fire extinguishing device according to claim 1, characterized in that: The starting wire is a heat-sensitive wire or / and an electronic ignition head.

10. The power distribution cabinet automatic fire extinguishing device according to claim 9, characterized in that: The shell is further provided with a detection head mounted in the first cavity.

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