Vapor-liquid fire suppression device used in cable laying space

Abstract

The utility model discloses a vapor-liquid fire suppression device used in a cable laying space, the top of the vapor-liquid fire suppression device is provided with a commutator for controlling the spraying direction of a fire extinguishing medium, the commutator comprises a base (1), the base (1) is provided with a controller (2), the base (1) is provided with a sensor (3) connected with the controller (2), the base (1) is provided with a U-shaped hose (4), and the U-shaped hose (4) is connected with the controller (2). A bent part of the hose (4) is sleeved with a spring (5), one end of the hose (4) is fixed with the base (1) and extends to a jet orifice of the vapor-liquid fire suppression device, a joint structure connected with the controller (2) is arranged between the other end of the hose (4) and the base (1), and the orientation of the other end of the hose (4) is opposite to the detection direction of the sensor (3). The fire extinguishing device has the advantages that a fire extinguishing medium can be sprayed out towards a fire point, and the fire extinguishing effect is good.

Description

Technical Field

[0001] The utility model belongs to the field of fire extinguishing equipment, in particular to a gas-liquid fire suppression device used in a cable laying space. Background Art

[0002] With the development of society and the economy, electricity accounts for nearly 30% of all energy consumption. Industrial and agricultural production, as well as people's daily lives, are highly dependent on electricity supply. Power outages pose a significant threat to socioeconomic development, and the demand for substation operational reliability is becoming increasingly stringent. In real-world production, unmanned substations have become the predominant mode of operation in substations. However, fire prevention measures within cabinet rooms and other spaces are still designed according to the fire prevention standards of traditional manned stations. In particular, the application and standardization of fire prevention technologies in cable laying spaces, such as indoor and outdoor cable trenches and cable shafts, are still in their infancy. Inadequate fire prevention measures within cable laying spaces have become a potential threat to the safe operation of the power grid.

[0003] Cables in underground cable trenches not only transmit electrical energy but also sometimes perform metering, communications, and relay protection functions. Prolonged operation of power cables in trenches can lead to aging and discharge of the cable's external insulation. This, combined with the accumulation of flammable gases like methane produced by microbial decomposition of dead plants and animals in the trench, can ultimately cause fires and explosions in the trench. The confined and complex environment within the trench makes inspections particularly difficult. A cable fault within the trench can cause relay protection failure, widening the fault range, damaging primary equipment, and impacting load production.

[0004] The vapor-liquid fire suppression device is a new type of fire extinguishing equipment developed in recent years. It primarily consists of a liquid fire extinguishing medium generator, a solid fire extinguishing medium generator, a starting assembly, a cooling filter, and a housing with a nozzle. The housing is equipped with a nozzle. The core fire extinguishing medium is formed by the vaporization of the liquid fire extinguishing medium generator and the self-reactive vapor of the solid fire extinguishing medium generator. When a fire occurs, the fire extinguishing medium is ejected from the nozzle and diffuses freely. The liquid fire extinguishing medium generator absorbs heat and easily vaporizes, extinguishing the fire without leaving any residue after vaporization. The dielectric breakdown voltage of its saturated vapor reaches 15.6kV, while the breakdown voltage of its liquid form is 45kV, making it particularly suitable for early fire extinguishing in small spaces. The solid fire extinguishing medium generator is a chemical mixture composed of an oxidizer, a reducing agent, a combustion rate controller, and a binder. It is stored in solid form and is chemically stable, non-volatile, less susceptible to environmental impact, and has a long shelf life.

[0005] While existing vapor-liquid fire suppression devices offer numerous advantages, there's still room for improvement. For example, once the device is installed, the nozzle's spray direction is fixed, but the location of the fire point is uncertain. This makes it impossible to guarantee that the nozzle's spray direction is aligned with the fire point, resulting in a potentially long time for the fire extinguishing medium to reach the fire point, hindering early fire extinguishing and minimizing losses. This is particularly true for cable laying spaces, which are long and narrow due to the shape and orientation of the cables. Once the vapor-liquid fire suppression device is installed, the fire point can occur either in front of or behind the device. If the device's nozzle is aligned with one side of the cable and the fire point is located on the other side, the fire extinguishing medium will take a long time to reach the fire point, potentially reducing the fire extinguishing effect. Utility Model Content

[0006] The purpose of the utility model is to provide a gas-liquid fire suppression device for use in a cable laying space. The utility model has the advantage of being able to spray the fire extinguishing medium toward the fire point, thereby achieving a better fire extinguishing effect.

[0007] The technical solution of the present utility model is as follows: a gas-liquid fire suppression device for a cable laying space, wherein a commutator for controlling the spraying direction of a fire extinguishing medium is provided on the top of the gas-liquid fire suppression device, the commutator comprising a base, a controller being provided on the base, a sensor connected to the controller being provided on the base, a U-shaped hose being provided on the base, a bent portion of the hose being covered with a spiral spring, one end of the hose being fixed to the base and extending to the spray port of the gas-liquid fire suppression device, a coupling structure for connecting to the controller being provided between the other end of the hose and the base, the coupling structure being able to be disconnected from the base by the action of the controller, and the direction of the other end of the hose being opposite to the detection direction of the sensor.

[0008] In the aforementioned vapor-liquid fire suppression device for a cable laying space, a groove is provided at the bottom of the base, and the controller is located in the groove.

[0009] In the aforementioned vapor-liquid fire suppression device for a cable laying space, the sensor is fixed on the top of the base.

[0010] In the aforementioned gas-liquid fire suppression device for cable laying space, a detection hole is provided on the side wall of the base, and the sensor is fixed in the groove with the detection end of the sensor aligned with the detection hole.

[0011] In the aforementioned gas-liquid fire suppression device for a cable laying space, the sensor is an infrared sensor.

[0012] In the aforementioned gas-liquid fire suppression device for cable laying space, the hose is located above the base, and the end of the hose fixed to the base is provided with a hard first sheath. The hose passes through the first sheath and is connected to the injection port, and the first sheath is fixed to the base.

[0013] In the aforementioned gas-liquid fire suppression device for cable laying space, the joint structure includes a hard second sheath passed through by a hose, the second sheath is connected to the base through a rope, the rope material is low-melting-point chemical fiber, and a heating wire connected to the controller is provided on one side of the rope.

[0014] In the aforementioned gas-liquid fire suppression device for cable laying space, the coupling structure includes a second sheath passed through by a hose, the second sheath is provided with a screw hole, and a screw is provided in the screw hole. The coupling structure also includes a micro reduction motor located in the groove, the micro reduction motor is fixed to the bottom surface of the groove, and the output end of the micro reduction motor is connected to the screw.

[0015] Compared with the prior art, the present invention adds a commutator on the basis of the existing gas-liquid fire suppression device. The commutator is provided with a hose, one end of the hose is connected to the injection port of the gas-liquid fire suppression device, and a spring is provided on the hose. In the initial state, the hose is restricted to a U shape by the coupling structure, and the sensor is used to determine whether the fire point is in the outlet direction of the hose. When the fire point is in the outlet direction of the hose, the hose remains in a U shape, so that the fire extinguishing medium can be sprayed toward the fire point. When the fire point is not in the outlet direction of the hose, the coupling structure is disconnected, and the spring changes the outlet direction of the hose so that the outlet direction of the hose is toward the fire point, and the fire extinguishing medium can also be sprayed toward the fire point, thereby ensuring that the fire extinguishing medium arrives at the fire point in a shorter time and the fire extinguishing effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a top view of the commutator of Example 1.

[0017] Figure 2 This is a left side view of the commutator of Example 1.

[0018] Figure 3 This is a top view of the commutator of Example 2.

[0019] Figure 4 This is a left side view of the bonding structure of Example 2.

[0020] The marks in the accompanying drawings are: 1-base, 2-controller, 3-sensor, 4-hose, 5-spring, 6-groove, 7-first sheath, 8-second sheath, 9-rope, 10-heating wire, 11-screw hole, 12-screw, 13-micro reduction motor. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0022] Example 1. A vapor-liquid fire suppression device for use in a cable laying space, such as Figure 1 and Figure 2 As shown, a commutator for controlling the spraying direction of the fire extinguishing medium is provided on the top of the gas-liquid fire suppression device. The commutator includes a base 1. A groove 6 is provided at the bottom of the base 1. A controller 2 is provided in the groove 6. A sensor 3 connected to the controller 2 is provided on the top of the base 1.

[0023] A U-shaped hose 4 made of polyurethane (PU) is installed above the base 1. A coiled spring 5 is sheathed around the bent portion of the hose 4. One end of the hose 4 is secured to the base 1 via a rigid first sheath 7. The hose 4 passes through the first sheath 7 and connects to the injection port of the vapor-liquid fire suppression device. A joint structure for connecting to the controller 2 is located between the other end of the hose 4 and the base 1. The joint structure, activated by the controller 2, can disconnect the other end of the hose 4 from the base 1. The other end of the hose 4 is oriented in the opposite direction of the detection direction of the sensor 3.

[0024] The coupling structure includes a hard second sheath 8 passed through by the hose 4. The second sheath 8 is connected to the base 1 via a rope 9. The rope 9 is made of a low-melting-point chemical fiber, such as polypropylene. A heating wire 10 connected to the controller 2 is provided on one side of the rope 9. The heating wire 10 is bound to the rope 9.

[0025] Working Principle of Example 1: Place the gas-liquid fire suppression device within the cable laying space, with the outlet of hose 4 oriented parallel to the cable run. When a fire occurs within the cable laying space, the fire extinguishing medium is ejected from hose 4 through the device's nozzle. If sensor 3 does not detect a fire source, indicating that the fire originates in the direction of hose 4's outlet, the fire extinguishing medium can reach the fire quickly, and controller 2 remains inactive. If sensor 3 detects a fire source, indicating that the fire originates on the opposite side of hose 4's outlet, controller 2 heats heating wire 10 for several seconds, causing cable 9 to melt. Under the elastic force of spring 5, hose 4 transforms from a U-shape to a straight line, reversing its outlet direction and allowing the fire extinguishing medium to reach the fire quickly.

[0026] In Example 1, the sensor 3 and controller 2 can be a flame sensor relay module manufactured by Xinwei Electronics. This module includes a circuit board with an integrated infrared sensor and relay. The relay serves as the controller 2, and the heating wire 10 is connected to the mains via the relay. When the infrared sensor detects a fire source, the relay closes, causing the heating wire 10 to conduct electricity and generate heat. The infrared sensor on the module can be extended with wires and fixed to the top of the base 1.

[0027] The sensor 3 and controller 2 can also be modified from a conventional human infrared sensor switch (such as the V60-010). The human infrared sensor switch incorporates an infrared sensor for detecting the human infrared spectrum and controller 2. Simply replace the original infrared sensor for detecting the human infrared spectrum with an infrared sensor for detecting flames or a UV sensor. The replaced sensor is mounted on the base 1, and the remaining components are placed in the recess 6. An extension wire connects the two, and the heating wire 10 is connected to the mains via the human infrared sensor switch.

[0028] Sensor 3 can also be a HY01, HY-A1, or ZRP320 flame sensor, and controller 2 can be an FX2N. The signal output terminal of sensor 3 is connected to the signal input terminal of controller 2, and heating wire 10 is connected to the control port of controller 2. When sensor 3 detects a fire source, it outputs a signal to controller 2. Controller 2 receives the signal and energizes heating wire 10. For more specific connection methods, please refer to the instruction manual of controller 2.

[0029] Example 2. A vapor-liquid fire suppression device for use in a cable laying space, such as Figure 3 and Figure 4 As shown, the difference from embodiment 1 lies in the different bonding structures. The details are as follows:

[0030] The coupling structure includes a second sheath 8 passed through by the hose 4, a screw hole 11 is provided at the bottom of the second sheath 8, a screw rod 12 is provided in the screw hole 11, and the coupling structure also includes a micro reduction motor 13 located in the groove 6, the micro reduction motor 13 is fixed to the bottom surface of the groove 6, and the output end of the micro reduction motor 13 is connected to the screw rod 12.

[0031] The working principle of Example 2 is different from the working principle of Example 1. When the infrared sensor 3 detects a fire source, the controller 2 energizes the micro reduction motor 13, and the micro reduction motor 13 causes the screw 12 to disengage from the screw hole 11. Under the elastic force of the spring 5, the hose 4 changes from a U-shape to a straight shape, and the outlet direction of the hose 4 is reversed, so that the fire extinguishing medium can reach the fire point quickly.

[0032] Example 3. Compared with Example 1, the difference is that the sensor 3 and the controller 2 are both located in the groove 6, a detection hole is opened on the side wall of the base 1, and the detection end of the sensor 3 is aligned with the detection hole. The detection hole is used to allow the sensor 3 to pass through the base 1 and detect the fire source in the corresponding direction.

Claims

1. A vapor-liquid fire suppression device for use in cable laying spaces, characterized by: The top of the gas-liquid fire suppression device is provided with a commutator for controlling the ejection direction of the fire extinguishing medium. The commutator comprises a base (1), a controller (2) is provided on the base (1), a sensor (3) connected to the controller (2) is provided on the base (1), a U-shaped hose (4) is provided on the base (1), a helical spring (5) is sleeved on the bent portion of the hose (4), one end of the hose (4) is fixed to the base (1) and extends to the ejection port of the gas-liquid fire suppression device, a coupling structure for connecting to the controller (2) is provided between the other end of the hose (4) and the base (1), the coupling structure can be disconnected from the other end of the hose (4) by the action of the controller (2), and the direction of the other end of the hose (4) is opposite to the detection direction of the sensor (3).

2. The vapor-liquid fire suppression device for use in a cable laying space according to claim 1, characterized in that: A groove (6) is provided at the bottom of the base (1), and the controller (2) is located in the groove (6).

3. The vapor-liquid fire suppression device for use in a cable laying space according to claim 2, characterized in that: The sensor (3) is fixed on the top of the base (1).

4. The vapor-liquid fire suppression device for use in a cable laying space according to claim 2, characterized in that: A detection hole is provided on the side wall of the base, and the sensor (3) is fixed in the groove (6), with the detection end of the sensor (3) aligned with the detection hole.

5. The vapor-liquid fire suppression device for use in a cable laying space according to claim 1, characterized in that: The sensor (3) is an infrared sensor.

6. The vapor-liquid fire suppression device for use in a cable laying space according to claim 1, characterized in that: The hose (4) is located above the base (1); a hard first sheath (7) is provided at the end of the hose (4) fixed to the base (1); the hose (4) passes through the first sheath (7) and is connected to the injection port; the first sheath (7) is fixed to the base (1).

7. The vapor-liquid fire suppression device for use in a cable laying space according to claim 6, characterized in that: The joint structure comprises a hard second sheath (8) passed through by the hose (4); the second sheath (8) is connected to the base (1) via a rope (9); the rope (9) is made of low-melting-point chemical fiber; a heating wire (10) connected to the controller (2) is provided on one side of the rope (9).

8. The vapor-liquid fire suppression device for use in a cable laying space according to claim 6, characterized in that: The coupling structure comprises a second sheath (8) through which the hose (4) passes, a screw hole (11) being provided on the second sheath (8), a screw rod (12) being provided in the screw hole (11), and the coupling structure further comprises a micro reduction motor (13) located in the groove (6), the micro reduction motor (13) being fixed to the bottom surface of the groove (6), and an output end of the micro reduction motor (13) being connected to the screw rod (12).

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