Automatic fire extinguishing device for cable trench

Abstract

The utility model discloses an automatic fire extinguishing device for a cable trench, which comprises a shell, the front end of the shell is provided with a hemispherical flow guide cover aligned with flame, the flow guide cover is provided with a plurality of first gas spraying holes capable of spraying fire extinguishing gas in a conical shape, and the rear end of the shell is provided with a detachable rear cover. A first gasket and a second gasket are arranged on the wall of an inner cavity of the shell, a plurality of second air spraying holes are formed in the second gasket, and the inner cavity of the shell is divided into a battery bin layer, a medicament layer and a coolant layer which are sequentially distributed from back to front by the first gasket and the second gasket. The automatic fire extinguishing device for the cable trench is wide in sprayed gas coverage range and free of fire extinguishing gas residues.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fire extinguishing device, especially a cable trench automatic fire extinguishing device. BACKGROUND

[0002] The cable trench of a transformer substation, as an important part of a power grid, is crisscrossed, and there are many cables inside, which have great fire risks at cable joints and turning points. The existing fire-fighting means for the cable trench of a transformer substation include: 1. Fireproof paint: applying fireproof paint on the surface of a cable can improve the fire resistance of the cable and reduce the impact of a fire on the cable; 2. Temperature-sensitive cable: by laying along the direction of the cable trench, using a sine wave mode to enhance the contact with the protected cable, and by monitoring the temperature of the cable in real time, potential safety hazards can be found and handled in time to avoid equipment damage, power outage, and other losses caused by fire accidents. However, the above fire-fighting means can only provide early warning and passive fire prevention, and do not have the ability to actively extinguish fires. Once a fire occurs, the fire spreads quickly along the line, easily igniting other cables around, making it difficult to control the fire, and causing huge economic losses and social impact when the operation and maintenance personnel cannot handle it in time.

[0003] There are many existing automatic fire extinguishing devices on the market, including ultra-fine dry powder fire extinguishing devices and thermal aerosol fire extinguishing devices, but these automatic fire extinguishing devices also have some drawbacks. For example, the ultra-fine dry powder fire extinguishing device is difficult to clean after spraying: the residual dust after use is easy to fly, which may cause secondary pollution, the dust will fall on the surface of the equipment causing corrosion and damage, and the powder may enter the internal electronic equipment causing short circuit or failure; the thermal aerosol fire extinguishing device has a single nozzle direction, which is difficult to target the fire point position: the thermal aerosol fire extinguishing device has a single nozzle direction, which leads to insufficient space coverage and dynamic response problems, which has become a core bottleneck restricting its effectiveness. SUMMARY

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a cable trench automatic fire extinguishing device with a wide coverage range of sprayed gas and no residual fire extinguishing gas.

[0005] The utility model discloses a technical scheme that solves its technical problem is: a cable trench automatic fire extinguishing device, including the casing, the front end of casing is the half spherical fairing of alignment flame, is set up with a plurality of first jet orifice who can make fire extinguishing gas coniform injection on the fairing, the rear end of casing is provided with detachable rear cover, the inner chamber wall of casing is provided with first gasket and second gasket, is set up with a plurality of second jet orifice on the second gasket, first gasket and second gasket divide the inner chamber of casing into battery compartment layer, medicament layer and coolant layer that distribute in order from rear to front, battery compartment layer is the space surrounded by casing, first gasket and detachable rear cover, installs electronic assembly in battery compartment layer, and the electronic assembly includes circuit board and the battery for powering circuit board, and the circuit board is connected with two normally open temperature control switches through wire, and two normally open temperature control switches are located at the outside of casing, medicament layer is the space surrounded by casing, first gasket and second gasket, installs self-extinguishing insulation assembly in medicament layer, and the self-extinguishing insulation assembly includes self-extinguishing insulation material layer, electric ignition head and cylindrical paper tube, electric ignition head sets up at the front end of self-extinguishing insulation material layer, and the cylindrical paper tube is wrapped in the periphery of self-extinguishing insulation material layer, coolant layer is the space surrounded by fairing and second gasket, and is filled with coolant in coolant layer, and electric ignition head is connected in series with battery, circuit board and normally open temperature control switch through wire, and normally open temperature control switch temperature sensing closes and forms passage, triggers electric ignition head and ignites self-extinguishing insulation material layer, and self-extinguishing insulation material layer passes through coolant and sprays and releases fire -retardant gas from the first jet orifice of fairing to the fire -extinguishing free radical in flame.

[0006] Further specifically, in the above technical solution, the plurality of first jet orifices are arranged in a radial pattern on the fairing.

[0007] Further specifically, in the above technical solution, the plurality of second jet orifices are distributed in a matrix pattern on the second gasket.

[0008] Further specifically, in the above technical solution, the inner chamber wall of the casing is further provided with asbestos, and the asbestos is located at the front end surface of the first gasket.

[0009] Further specifically, in the above technical solution, the casing and the fairing are integrally formed.

[0010] Further specifically, in the above technical solution, the first gasket is provided with a through hole for wire routing.

[0011] Further specifically, in the above technical solution, the coolant is ceramic balls.

[0012] The cable trench automatic fire extinguishing device has the advantages that the jet holes on the flow guide cover are distributed to make the fire extinguishing gas be sprayed out in a conical shape, have a certain impact force and a wider coverage range, and the fire extinguishing gas has no residue and is suitable for fire extinguishing in large space scenes such as cable trenches. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0014] Figure 1 is a structural schematic view of the cable trench automatic fire extinguishing device of the present application;

[0015] Figure 2 is a structural schematic view of the flow guide cover;

[0016] Figure 3 is a structural schematic view of the first gasket;

[0017] Figure 4 is a structural schematic view of the second gasket.

[0018] In the drawing, 1 is a shell, 2 is a flow guide cover, 3 is a first jet hole, 4 is a detachable rear cover, 5 is a first gasket, 6 is a second gasket, 7 is a second jet hole, 8 is a circuit board, 9 is a normally open temperature control switch, 10 is a self-extinguishing insulation material layer, 11 is an electric ignition head, 12 is a cylindrical paper tube, 13 is a coolant, 14 is asbestos, and 15 is a through hole. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0020] For example, Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the utility model discloses a cable trench automatic fire extinguishing device, including the casing 1, the front end of casing 1 is the semispherical fairing 2 of alignment flame, is equipped with a plurality of first jet orifice 3 of the conical jet of making fire extinguishing gas of fairing 2, the rear end of casing 1 is provided with detachable rear cover 4, the inner chamber wall of casing 1 is provided with first gasket 5 and second gasket 6, is equipped with the through -hole 15 of the wire routing of first gasket 5, is equipped with a plurality of second jet orifice 7 on second gasket 6, a plurality of second jet orifice 7 are matrix distribution, first gasket 5 and second gasket 6 divide the inner chamber of casing 1 into battery compartment layer, medicament layer and coolant layer in order from back to front.

[0021] Specifically, the material of the first gasket 5 and the second gasket 6 is 304 stainless steel, so that the first gasket 5 and the second gasket 6 have high high-temperature resistance, excellent corrosion resistance and good processing performance.

[0022] The plurality of first jet orifices 3 are arranged in a radial manner on the fairing 2, which can make the fire extinguishing gas be sprayed in a 45° conical shape, so that the fire extinguishing gas has a certain impact force and a wider coverage range.

[0023] The casing 1 and the fairing 2 are integrally formed. Specifically, the casing 1 and the fairing 2 are integrally pressure cast from aluminum material, which can improve the overall structural strength and rigidity of the casing 1, realize lightweight, reduce production cost, improve production efficiency, and realize cost reduction and efficiency increase.

[0024] The inner chamber wall of the casing 1 is also provided with asbestos 14, which is located at the front end surface of the first gasket 5. The asbestos 14 mainly plays a heat insulation role. Since the thermal conductivity of asbestos fiber is low, it has excellent heat preservation and insulation effect.

[0025] The battery compartment layer is a space surrounded by the casing 1, the first gasket 5 and the detachable rear cover 4. The battery compartment layer is installed with an electronic assembly, which includes a circuit board 8 and a battery for supplying power to the circuit board 8. The circuit board 8 is connected with two normally open temperature control switches 9 through wires, and the two normally open temperature control switches 9 are located outside the casing 1. The battery compartment layer is sealed by applying sealant, and the outer surface of the circuit board 8 is also coated with sealant, which plays a heat insulation and moisture-proof role.

[0026] The medicine layer is a space surrounded by the shell 1, the first gasket 5 and the second gasket 6, and a self-extinguishing insulation assembly is installed in the medicine layer, the self-extinguishing insulation assembly comprises a self-extinguishing insulation material layer 10, an electric ignition head 11 and a cylindrical paper tube 12, the electric ignition head 11 is arranged at the front end of the self-extinguishing insulation material layer 10, and the cylindrical paper tube 12 is wrapped around the periphery of the self-extinguishing insulation material layer 10.

[0027] The coolant layer is a space surrounded by the flow guide cover 2 and the second gasket 6, and the coolant 13 is filled in the coolant layer.

[0028] The electric ignition head 11 is connected in series with the battery, the circuit board 8 and the normally open temperature control switch 9 through a wire, the normally open temperature control switch 9 is closed to form a path, triggers the electric ignition head 11 to ignite the self-extinguishing insulation material layer 10, and the self-extinguishing insulation material layer 10 is sprayed with the fire extinguishing gas from the first gas injection hole 3 of the flow guide cover 2 to extinguish the fire free radicals in the flame after passing through the coolant 13.

[0029] The cable trench automatic fire extinguishing device, the gas injection holes on the flow guide cover 2 are distributed to enable the fire extinguishing gas to be sprayed in a conical shape, have certain impact force and wider coverage, meanwhile, the fire extinguishing gas has no residue and is suitable for fire extinguishing in larger space scenes such as cable trenches.

[0030] The above is only a preferred specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, and all of them should be covered in the protection scope of the utility model.

Claims

1. A cable trench automatic fire extinguishing apparatus, characterized by: The application relates to a fire extinguishing device, which comprises a shell (1), wherein the front end of the shell (1) is a semispherical fairing (2) for aiming at a flame, a plurality of first gas injection holes (3) are formed in the fairing (2) to enable the extinguishing gas to be injected in a conical shape, a detachable rear cover (4) is arranged at the rear end of the shell (1), a first gasket (5) and a second gasket (6) are arranged on the inner cavity wall of the shell (1), a plurality of second gas injection holes (7) are formed in the second gasket (6), and the first gasket (5) and the second gasket (6) divide the inner cavity of the shell (1) into a battery compartment layer, a medicament layer and a coolant layer which are arranged in sequence from the rear to the front. The battery compartment layer is a space surrounded by the shell (1), the first gasket (5) and the detachable rear cover (4), and an electronic assembly is arranged in the battery compartment layer, wherein the electronic assembly comprises a circuit board (8) and a battery for supplying power to the circuit board (8). The circuit board (8) is connected with two normally open temperature control switches (9) through wires, and the two normally open temperature control switches (9) are arranged outside the shell (1). The medicament layer is a space surrounded by the shell (1), the first gasket (5) and the second gasket (6), and a self-extinguishing insulation assembly is arranged in the medicament layer, wherein the self-extinguishing insulation assembly comprises a self-extinguishing insulation material layer (10), an electric ignition head (11) and a cylindrical paper tube (12), the electric ignition head (11) is arranged at the front end of the self-extinguishing insulation material layer (10), and the cylindrical paper tube (12) is wrapped around the periphery of the self-extinguishing insulation material layer (10). The coolant layer is a space surrounded by the fairing (2) and the second gasket (6), and a coolant (13) is filled in the coolant layer. The electric ignition head (11) is connected with the battery, the circuit board (8) and the normally open temperature control switch (9) in series through wires, the normally open temperature control switch (9) is closed to form a path, the electric ignition head (11) is triggered to ignite the self-extinguishing insulation material layer (10), and the self-extinguishing insulation material layer (10) releases extinguishing gas from the first gas injection holes (3) of the fairing (2) through the coolant (13) to extinguish the extinguishing free radicals in the flame.

2. The automatic fire extinguishing apparatus for a cable chamber according to claim 1, characterized by: The plurality of first gas injection holes (3) are arranged on the fairing (2) in a radial manner.

3. The automatic fire extinguishing apparatus for a cable chamber according to claim 1, characterized by: The plurality of second gas injection holes (7) are arranged on the second gasket (6) in a matrix manner.

4. The automatic fire extinguishing apparatus for a cable chamber according to claim 1, characterized by: Asbestos (14) is further arranged on the inner cavity wall of the shell (1), and the asbestos (14) is arranged at the front end surface of the first gasket (5).

5. The automatic fire extinguishing apparatus for a cable chamber according to claim 1, characterized by: The shell (1) and the fairing (2) are integrally formed.

6. The automatic fire extinguishing apparatus for a cable chamber according to claim 1, characterized by: A through hole (15) for wire arrangement is formed in the first gasket (5).

7. The automatic fire extinguishing apparatus for a cable chamber according to claim 1, characterized by: The coolant (13) is a ceramic ball.

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