A fire extinguishing system for cable trench fires

Abstract

This invention provides a fire extinguishing system for cable trench fires, comprising a cable trench body and a DCS controller. Mounting brackets are respectively provided on the upper part of the inner walls on both sides of the cable trench body, and perfluorohexanone (PFH) extinguishing agent pipes are installed on each mounting bracket. Multiple extinguishing agent nozzles are installed at intervals on each PPH extinguishing agent pipe, with the nozzles on two PPH extinguishing agent pipes arranged alternately. A first control valve is installed at the inlet of each PPH extinguishing agent pipe, and a temperature sensing element is installed on the mounting bracket. The first control valve and the temperature sensing element are electrically connected to the DCS controller. The fire extinguishing system for cable trench fires provided by this invention can effectively prevent or reduce the risk of initial fires in cable trenches, ensuring the safety of the cable trenches.

Description

Technical Field

[0001] This utility model relates to the field of cable trench fire extinguishing technology, and in particular to a fire extinguishing system for cable trench fires. Background Technology

[0002] Cable trenches play a vital role in power systems as important channels for power and communication. However, due to the limited space, complex internal environment, and crisscrossing cables within cable trenches, coupled with high operating temperatures and inadequate routine faults and inspections, cable fires are easily triggered. Once a fire occurs, it spreads rapidly, and traditional firefighting methods are insufficient to effectively contain it.

[0003] Therefore, designing a fire extinguishing system that can effectively prevent or reduce the risk of initial fires in cable trenches is crucial for ensuring the safety of cable trenches. Utility Model Content

[0004] The purpose of this invention is to provide a fire extinguishing system for cable trench fires, which can effectively prevent or reduce the risk of initial fires in cable trenches and ensure the safety of cable trenches.

[0005] This utility model provides a fire extinguishing system for cable trench fires, including a cable trench body and a DCS controller. Mounting brackets are respectively provided on the upper part of the inner walls on both sides of the cable trench body. A perfluorohexanone (PFH) extinguishing agent pipeline is installed on each mounting bracket, and each PPHH pipeline extends along the length of the cable trench body. Multiple extinguishing agent nozzles are installed at intervals on each PPHH pipeline, and the nozzles on two PPHH pipelines are staggered. A first control valve is installed at the inlet of each PPHH pipeline, and a temperature sensing element is installed on the mounting bracket. The first control valve and the temperature sensing element are electrically connected to the DCS controller.

[0006] According to the fire extinguishing system for cable trench fires provided by this utility model, the mounting bracket includes a mounting side plate, a supporting base plate, and a plurality of fixing members connected between the mounting side plate and the supporting base plate. The plurality of fixing members are arranged sequentially at intervals along the length direction of the perfluorohexanone fire extinguishing agent pipeline. Each fixing member, the mounting side plate, and the supporting base plate respectively form a fixing hole, and the perfluorohexanone fire extinguishing agent pipeline is installed and fixed by passing through each fixing hole.

[0007] According to the fire extinguishing system for cable trench fires provided by this utility model, the mounting side plate is connected and fixed to the side wall of the cable trench body through multiple connectors.

[0008] According to the fire extinguishing system for cable trench fires provided by this utility model, the supporting base plate is perpendicular to the mounting side plate, and the supporting base plate is fixedly installed on the lower part of the mounting side plate.

[0009] According to the fire extinguishing system for cable trench fires provided by this utility model, the fixing component includes an arc-shaped fixing plate, a first connecting ear and a second connecting ear. The first connecting ear and the second connecting ear are respectively fixed at both ends of the arc-shaped fixing plate. The first connecting ear is connected and fixed to the mounting side plate by a first screw, and the second connecting ear is connected and fixed to the supporting base plate by a second screw.

[0010] According to the fire extinguishing system for cable trench fires provided by this utility model, a plurality of temperature sensing elements are installed on one of the mounting brackets. The plurality of temperature sensing elements are respectively arranged at intervals along the length direction of the mounting bracket, and each of the temperature sensing elements is respectively arranged above the perfluorohexanone fire extinguishing agent pipeline.

[0011] The fire extinguishing system for cable trench fires provided by this utility model also includes an external perfluorohexanone supply device, and each of the perfluorohexanone extinguishing agent pipelines is connected to the external perfluorohexanone supply device through a perfluorohexanone delivery pipeline.

[0012] According to the fire extinguishing system for cable trench fires provided by this utility model, a second control valve is provided at the outlet of the perfluorohexanone external supply device, and the second control valve is electrically connected to the DCS controller.

[0013] According to the fire extinguishing system for cable trench fires provided by this utility model, a booster pump is also installed on the perfluorohexanone delivery pipeline, and the booster pump is electrically connected to the DCS controller.

[0014] According to the fire extinguishing system for cable trench fires provided by this utility model, a first pressure detector and a second pressure detector are respectively installed on the perfluorohexanone delivery pipeline before and after the booster pump, and the first pressure detector and the second pressure detector are electrically connected to the DCS controller.

[0015] The fire extinguishing system for cable trench fires provided by this utility model features mounting brackets on the upper part of the inner walls on both sides of the cable trench body. Perfluorohexanone (PFH) extinguishing agent pipes are installed on each mounting bracket, and multiple extinguishing agent nozzles are installed at intervals on each PPHH extinguishing agent pipe, with the nozzles on two PPHH extinguishing agent pipes arranged alternately. This ensures more thorough and effective fire extinguishing of the internal space of the cable trench body. A first control valve is installed at the inlet of each PPHH extinguishing agent pipe, and a temperature sensing element is installed on the mounting bracket. The first control valve and the temperature sensing element are electrically connected to a DCS controller. The temperature sensing element detects the internal temperature of the cable trench body in real time and sends a signal to the DCS controller. When the signal received by the DCS controller from the temperature sensing element is higher than a preset temperature, it controls the first control valve to open, thereby delivering PPHH extinguishing agent into each PPHH extinguishing agent pipe and spraying it through each extinguishing agent nozzle. Therefore, the fire extinguishing system for cable trench fires of this invention can effectively prevent or reduce the risk of initial fires in cable trenches and ensure the safety of cable trenches. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional schematic diagram of the cable trench body in the fire extinguishing system of this utility model for cable trench fires;

[0018] Figure 2 This is a schematic diagram of the mounting bracket in the fire extinguishing system for cable trench fires according to this utility model;

[0019] Figure 3 This is a structural schematic diagram of the fixing component used in the fire extinguishing system for cable trench fires according to this utility model;

[0020] Figure 4 This is a schematic diagram of the fire extinguishing system of this utility model for cable trench fires.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Cable trench body;

[0023] 2. Mounting bracket; 21. Mounting side plate; 22. Support base plate; 23. Fastener; 24. Connector; 231. Arc-shaped fixing plate; 232. First connecting ear; 233. Second connecting ear; 234. First screw; 325. Second screw;

[0024] 3. Perfluorohexanone extinguishing agent pipeline; 4. Extinguishing agent nozzle; 5. First control valve; 6. Temperature sensing element; 7. Perfluorohexanone external supply equipment; 8. Perfluorohexanone delivery pipeline; 9. Second control valve; 10. Booster pump; 11. First pressure detector; 12. Second pressure detector. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] like Figures 1 to 4As shown, the fire extinguishing system for cable trench fires according to this utility model embodiment includes a cable trench body 1 and a DCS controller (not shown in the figure). The upper part of the inner walls on the left and right sides of the cable trench body 1 is provided with mounting brackets 2 respectively. Each mounting bracket 2 is equipped with a perfluorohexanone fire extinguishing agent pipe 3, and each perfluorohexanone fire extinguishing agent pipe 3 extends along the length direction of the cable trench body 1.

[0029] Each perfluorohexanone extinguishing agent pipeline 3 is equipped with multiple extinguishing agent nozzles 4 at intervals, and the extinguishing agent nozzles 4 on two perfluorohexanone extinguishing agent pipelines 3 are arranged alternately. This arrangement of the extinguishing agent nozzles 4 ensures that the internal space of the cable trench body 1 is sprayed more fully and effectively during fire extinguishing.

[0030] Each of the perfluorohexanone extinguishing agent pipelines 3 has a first control valve 5 installed at its inlet, and a temperature sensing element 6 installed on the mounting bracket 2. The first control valves 5 and the temperature sensing element 6 are electrically connected to the DCS controller. The temperature sensing element 6 is used to detect the internal temperature of the cable trench body 1 in real time and send a signal to the DCS controller. When the signal received by the DCS controller from the temperature sensing element 6 is higher than the set temperature, it will control the first control valve 5 to open, thereby delivering perfluorohexanone extinguishing agent into each of the perfluorohexanone extinguishing agent pipelines 3, and spraying it through each extinguishing agent nozzle 4 to extinguish the fire.

[0031] Therefore, the fire extinguishing system for cable trench fires according to the present invention can effectively prevent or reduce the risk of initial fires in cable trenches and ensure the safety of cable trenches.

[0032] In some embodiments of this utility model, the mounting bracket 2 includes a mounting side plate 21, a supporting base plate 22, and a plurality of fasteners 23 connected between the mounting side plate 21 and the supporting base plate 22. The plurality of fasteners 23 are arranged sequentially at intervals along the length direction of the perfluorohexanone extinguishing agent pipeline 3. Each fastener 23, the mounting side plate 21, and the supporting base plate 22 respectively form a fixing hole, so that the perfluorohexanone extinguishing agent pipeline 3 can be installed and fixed by passing through each fixing hole.

[0033] The mounting side plate 21 is connected and fixed to the side wall of the cable trench body 1 through multiple connectors 24, so as to achieve reliable fixation of the mounting bracket 2 on the inner side wall of the cable trench body 1. Depending on the actual use requirements, the connectors 24 can be bolts, screws or rivets.

[0034] The supporting base plate 22 is perpendicular to the mounting side plate 21, and the supporting base plate 22 is fixedly installed on the lower part of the mounting side plate 21. That is, the supporting base plate 22 and the mounting side plate 21 are connected to form an L-shaped structure, which facilitates the installation of perfluorohexanone fire extinguishing agent pipeline 3.

[0035] The fixing component 23 includes an arc-shaped fixing plate 231, a first connecting ear 232, and a second connecting ear 233. The first connecting ear 232 and the second connecting ear 233 are respectively fixed at both ends of the arc-shaped fixing plate 231. The first connecting ear 232 is connected and fixed to the mounting side plate 21 by a first screw 234, and the second connecting ear 233 is connected and fixed to the supporting base plate 22 by a second screw 325. After the perfluorohexanone extinguishing agent pipeline 3 is laid on the L-shaped structure formed by the supporting base plate 22 and the mounting side plate 21, the perfluorohexanone extinguishing agent pipeline 3 is fixed by the fixing components 23, thereby achieving reliable fixation of the perfluorohexanone extinguishing agent pipeline 3 on the mounting bracket 2.

[0036] Specifically, multiple temperature sensing elements 6 are installed on one of the mounting brackets 2. These elements are spaced apart along the length of the mounting bracket 2 and are positioned above the perfluorohexanone extinguishing agent pipeline 3. By installing multiple temperature sensing elements 6 along the length of the mounting bracket 2, the temperature of each area inside the cable trench body 1 can be detected, ensuring timely detection and extinguishing of fires in the event of a fire.

[0037] In some embodiments of this invention, the fire extinguishing system for cable trench fires further includes a perfluorohexanone external supply device 7, with each perfluorohexanone extinguishing agent pipeline 3 connected to the external supply device 7 via a perfluorohexanone delivery pipeline 8. The external supply device 7 can supply extinguishing agent to each perfluorohexanone extinguishing agent pipeline 3.

[0038] A second control valve 9 is installed at the outlet of the perfluorohexanone external supply device 7, and the second control valve 9 is electrically connected to the DCS controller. The DCS controller can control the external supply of extinguishing agent by the perfluorohexanone external supply device 7.

[0039] A booster pump 10 is also installed on the perfluorohexanone delivery pipeline 8, and the booster pump 10 is electrically connected to the DCS controller. That is, the booster pump 10 can pressurize the extinguishing agent delivered to each external perfluorohexanone supply device 7, thereby ensuring the spray intensity of each extinguishing agent nozzle 4 and ensuring the extinguishing effect.

[0040] A first pressure detector 11 and a second pressure detector 12 are installed on the perfluorohexanone delivery pipelines 8 before and after the booster pump 10, respectively. The first pressure detector 11 and the second pressure detector 12 are electrically connected to the DCS controller. That is, the first pressure detector 11 and the second pressure detector 12 can detect the extinguishing agent delivery pressure before and after pressurization, respectively, to determine whether the booster pump 10 is working properly.

[0041] The working process of the fire extinguishing system for cable trench fires according to this embodiment of the invention is as follows:

[0042] In the early stages of a fire, the temperature sensing element 6 can detect abnormal temperatures (above a preset value) and send a signal to the DCS controller. Based on the detection data, the DCS controller determines that a fire has occurred and then controls the first control valve 5, the second control valve 9, and the booster pump 10 to open simultaneously. The fire extinguishing agent output from the perfluorohexanone external supply device 7 is pressurized by the booster pump 10 and then sprayed through the fire extinguishing agent nozzles 4 on each perfluorohexanone fire extinguishing agent pipeline 3 to perform timely and effective fire extinguishing operations inside the cable trench body 1, thereby effectively preventing or reducing the risk of initial fires in the cable trench and ensuring the safety of the cable trench.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fire extinguishing system for cable trench fires, characterized in that, The device includes a cable trench body and a DCS controller. Mounting brackets are provided on the upper parts of the inner walls on both sides of the cable trench body. A perfluorohexanone (PFH) extinguishing agent pipeline is installed on each mounting bracket, and each PPHH pipeline extends along the length of the cable trench body. Multiple extinguishing agent nozzles are installed at intervals on each PPHH pipeline, with the nozzles on two PPHH pipelines arranged alternately. A first control valve is installed at the inlet of each PPHH pipeline, and a temperature sensing element is installed on the mounting bracket. The first control valve and the temperature sensing element are electrically connected to the DCS controller.

2. The fire extinguishing system for cable trench fires according to claim 1, characterized in that, The mounting bracket includes a mounting side plate, a supporting base plate, and multiple fasteners connected between the mounting side plate and the supporting base plate. The multiple fasteners are arranged sequentially at intervals along the length of the perfluorohexanone extinguishing agent pipeline. Each fastener, the mounting side plate, and the supporting base plate form a fixing hole, and the perfluorohexanone extinguishing agent pipeline passes through each fixing hole for installation and fixation.

3. The fire extinguishing system for cable trench fires according to claim 2, characterized in that, The mounting side plate is connected and fixed to the side wall of the cable trench body through multiple connectors.

4. The fire extinguishing system for cable trench fires according to claim 2, characterized in that, The supporting base plate is perpendicular to the mounting side plate, and the supporting base plate is fixedly installed on the lower part of the mounting side plate.

5. The fire extinguishing system for cable trench fires according to claim 2, characterized in that, The fastener includes an arc-shaped fixing plate, a first connecting ear, and a second connecting ear. The first connecting ear and the second connecting ear are respectively fixed at both ends of the arc-shaped fixing plate. The first connecting ear is connected and fixed to the mounting side plate by a first screw, and the second connecting ear is connected and fixed to the supporting base plate by a second screw.

6. The fire extinguishing system for cable trench fires according to claim 1, characterized in that, Multiple temperature sensing elements are installed on one of the mounting brackets, and the multiple temperature sensing elements are spaced apart along the length of the mounting bracket, and each temperature sensing element is located above the perfluorohexanone fire extinguishing agent pipeline.

7. The fire extinguishing system for cable trench fires according to claim 1, characterized in that, It also includes an external perfluorohexanone supply device, and each of the perfluorohexanone extinguishing agent pipelines is connected to the external perfluorohexanone supply device through a perfluorohexanone delivery pipeline.

8. The fire extinguishing system for cable trench fires according to claim 7, characterized in that, A second control valve is provided at the outlet of the perfluorohexanone external supply device, and the second control valve is electrically connected to the DCS controller.

9. The fire extinguishing system for cable trench fires according to claim 8, characterized in that, A booster pump is also installed on the perfluorohexanone delivery pipeline, and the booster pump is electrically connected to the DCS controller.

10. The fire extinguishing system for cable trench fires according to claim 9, characterized in that, A first pressure detector and a second pressure detector are respectively installed on the perfluorohexanone delivery pipeline before and after the booster pump. The first pressure detector and the second pressure detector are electrically connected to the DCS controller.

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