Flexible explosion-proof fire extinguishing device for middle-high voltage cable joint

Abstract

The flexible anti-explosion fire extinguishing device comprises a flexible anti-explosion shell, a fire extinguishing agent storage cavity is formed in the anti-explosion shell, an opening matched with the cable connector is formed in the top of the anti-explosion shell, a spraying hole communicated with the fire extinguishing agent storage cavity is formed in the inner wall of the shell, and the spraying hole is communicated with the fire extinguishing agent storage cavity. The spraying holes are distributed on the periphery of the inner wall of the shell, the spraying pipe is communicated with the spraying holes, the spraying pipe is arranged in the extending direction of the inner wall of the anti-explosion shell, the tail end of the spraying pipe extends to an opening of the anti-explosion shell to form a spraying ring surrounding the cable connector, and a plurality of spraying openings are formed in the tail end of the spraying ring. The jet orifices are evenly distributed on the peripheral side of the jet ring, a valve control mechanism is arranged in each jet orifice, and a fire extinguishing agent in the fire extinguishing agent storage cavity can be rapidly jetted to the periphery of the cable connector when a fire occurs, so that the fire extinguishing effect is achieved. And due to the design of the spraying ring, the fire extinguishing agent can cover the cable joint more uniformly and comprehensively, and the fire extinguishing effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cable fire extinguishing device, concretely is a kind of middle high voltage cable joint flexible explosion-proof fire extinguishing device. BACKGROUND

[0002] With the continuous development of science and technology, the demand of industrial and urban residents for electricity also increases day by day, under the impetus of this demand, China's power construction develops rapidly, and the scale of power grid is expanding. After laying cable, in order to make it a continuous line, each section of line must be connected as a whole, and these connecting points are called cable joints, which are also called cable heads. The cable joint in the middle part of the cable line is called intermediate joint, and the cable joint at the two ends of the line is called terminal head. The cable joint is used to lock and fix the incoming and outgoing lines, and plays the role of waterproof, dustproof and shockproof. Most of the power grid fires are caused by cable fires. Because the cable is hidden underground, the daily patrol and maintenance is not in place, and the cable joint is prone to temperature rise due to high contact resistance, which causes cable fire, and the fire point at the cable joint accounts for 60%.

[0003] Most of the fire extinguishing devices on the market cannot discover faults in time, cannot protect other line cables from circuit breaking, cannot quickly and effectively put out fires, cannot control the internal explosion within the minimum damage range, and do not have the function of explosion protection. Therefore, we propose a middle high voltage cable joint flexible explosion-proof fire extinguishing device. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a middle high voltage cable joint flexible explosion-proof fire extinguishing device to solve the above technical problems.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a middle high voltage cable joint flexible explosion-proof fire extinguishing device, which comprises an explosion-proof shell, an extinguishing agent storage cavity is arranged in the explosion-proof shell, an opening matched with the cable joint is arranged at the top of the explosion-proof shell, an injection hole communicated with the extinguishing agent storage cavity is arranged on the inner wall of the explosion-proof shell, the injection hole is distributed around the inner wall of the explosion-proof shell, and a spray pipe communicated with the injection hole, the spray pipe is arranged along the extension direction of the inner wall of the explosion-proof shell, and the end of the spray pipe extends to the opening of the explosion-proof shell, forming a spray ring around the cable joint, a plurality of injection ports are arranged at the end of the spray ring, the injection ports are uniformly distributed on the circumferential side of the spray ring, and a valve control mechanism is arranged in the injection port.

[0006] Preferably, the valve control mechanism comprises a spring and a valve piece matched with the injection port, the valve piece is connected with the inner wall of the injection port through the spring, one end of the spring is connected with the valve piece, and the other end of the spring is connected with the inner wall of the injection port, and the valve control mechanism further comprises a trigger, and the trigger is connected with the spring.

[0007] Preferably, the valve control mechanism further comprises a temperature sensing device connected to the trigger.

[0008] Preferably, the temperature sensing device comprises a temperature sensor arranged outside the temperature sensing device and a control chip electrically connected to the trigger.

[0009] Preferably, the trigger adopts an electromagnetic triggering mode.

[0010] Preferably, the joint of the explosion-proof shell is wrapped with a fireproof and electric arc resistant adhesive tape outside.

[0011] Preferably, the joint of the explosion-proof shell is provided with a sealing rubber ring for water proofing.

[0012] Preferably, the extinguishing agent stored in the extinguishing agent storage cavity is perfluorohexanone.

[0013] Compared with the prior art, the flexible explosion-proof extinguishing device for the medium and high voltage cable joint can rapidly spray the extinguishing agent around the cable joint through the spray hole and the spray pipe when a fire occurs, so as to play a role in extinguishing the fire. The design of the spray ring enables the extinguishing agent to more uniformly and comprehensively cover the cable joint, thereby improving the extinguishing effect. The valve control mechanism enables the device to spray the extinguishing agent at a suitable time. When the cable joint is abnormal, the temperature sensing device senses the temperature change and controls the trigger to trigger, so that the spring release valve piece is released, thereby opening the spray port, and the extinguishing agent is sprayed out. This design can ensure that the extinguishing agent is sprayed only when the cable joint really needs to be extinguished, thereby avoiding unnecessary waste and misoperation. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0015] Fig. 1 is a whole schematic view of a flexible explosion-proof extinguishing device for a medium and high voltage cable joint according to the embodiment;

[0016] Fig. 2 is a side view of a flexible explosion-proof extinguishing device for a medium and high voltage cable joint according to the embodiment;

[0017] Fig. 3 is a schematic view of a valve control mechanism of a flexible explosion-proof extinguishing device for a medium and high voltage cable joint according to the embodiment.

[0018] The components represented by the reference numbers in the drawings are listed as follows:

[0019] 1, explosion-proof housing; 2, fire extinguishing agent storage cavity; 3, cable joint; 4, opening; 5, injection hole; 6, injection pipe; 7, injection ring; 8, injection port; 9, valve control mechanism; 10, spring; 11, valve piece; 12, trigger; 13, temperature sensing device; 14, temperature sensor; 15, control chip; 16, fireproof anti-arc tape; 17, sealing rubber ring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] Please refer to Figs. 1-3 The present application provides a technical solution: a flexible explosion-proof fire extinguishing device for medium and high voltage cable joints, which comprises an explosion-proof housing 1, an internal fire extinguishing agent storage cavity 2 is arranged in the explosion-proof housing 1, an opening 4 adapted to the cable joint 3 is arranged at the top of the explosion-proof housing 1, an injection hole 5 in communication with the fire extinguishing agent storage cavity 2 is arranged on the inner wall of the explosion-proof housing 1, the injection hole 5 is distributed around the inner wall of the explosion-proof housing 1, an injection pipe 6 in communication with the injection hole 5 is arranged, the injection pipe 6 is arranged along the extension direction of the inner wall of the explosion-proof housing 1, the end of the injection pipe 6 extends to the opening 4 of the explosion-proof housing 1, forming an injection ring 7 around the cable joint 3, a plurality of injection ports 8 are arranged at the end of the injection ring 7, the injection ports 8 are uniformly distributed around the injection ring 7, and a valve control mechanism 9 is arranged in the injection port 8.

[0022] Specifically, the valve control mechanism 9 comprises a spring 10 and a valve piece 11 adapted to the injection port 8, the valve piece 11 is connected to the inner wall of the injection port 8 through the spring 10, one end of the spring 10 is connected to the valve piece 11, and the other end of the spring 10 is connected to the inner wall of the injection port 8, the valve control mechanism 9 further comprises a trigger 12 connected to the spring 10, by arranging the valve control mechanism 9 comprising the spring 10, the valve piece 11 and the trigger 12, when the cable joint 3 abnormally overheats or has a fire risk, the trigger 12 can quickly respond, compress the spring 10, and then push away the valve piece 11, so that the fire extinguishing agent in the fire extinguishing agent storage cavity 2 is quickly injected to the cable joint 3 through the injection port 8, achieving the effect of timely extinguishing fire.

[0023] Specifically, the valve control mechanism 9 further comprises a temperature sensing device 13 connected with the trigger 12, the temperature sensing device 13 comprising a temperature sensor 14 arranged outside the temperature sensing device 13 and a control chip 15 electrically connected with the trigger 12. Through the application of the temperature sensing device 13, the valve control mechanism 9 not only improves the working efficiency, but also greatly enhances the safety. When the ambient temperature abnormally rises, the valve control mechanism 9 can quickly respond by adjusting the opening and closing state of the valve to effectively prevent safety accidents caused by excessively high temperature.

[0024] Specifically, the trigger 12 adopts an electromagnetic triggering mode, which makes the trigger 12 have the characteristics of fast response speed and good stability, and can quickly and effectively realize the injection of the fire extinguishing agent.

[0025] Specifically, the joint of the explosion-proof shell 1 is wrapped with a fireproof and electric arc resistant adhesive tape 16. Through the arrangement of the fireproof and electric arc resistant adhesive tape 16, when an abnormally high temperature or an electric arc phenomenon occurs at the cable joint 3, the fireproof and electric arc resistant adhesive tape 16 can effectively isolate and prevent the spread of fire, further enhancing the safety performance of the device.

[0026] Specifically, the joint of the explosion-proof shell 1 is provided with a sealing rubber ring 17 for waterproofing. Through the arrangement of the sealing rubber ring 17, the overall waterproof performance is better and water leakage is less likely to occur.

[0027] Specifically, the fire extinguishing agent stored in the fire extinguishing agent storage cavity 2 is perfluorohexone. Perfluorohexone has high fire extinguishing efficiency and does not cause damage to electrical equipment, and is very suitable for fire extinguishing of the medium and high voltage cable joint 3. Its good insulation performance and fast evaporation characteristics can effectively extinguish the fire source in a short time, thereby protecting the safety of the cable joint 3 and the surrounding equipment. Moreover, the perfluorohexone fire extinguishing agent also has the advantages of environmental protection and no pollution.

[0028] One specific application example of the embodiment is as follows:

[0029] In use, first, the flexible explosion-proof fire extinguishing device is installed outside the medium and high voltage cable joint 3, ensuring that the opening 4 of the flexible explosion-proof shell 1 is adapted to and tightly fitted with the cable joint 3. Then, the fireproof and electric arc resistant adhesive tape 16 is wrapped outside the joint of the explosion-proof shell 1 to increase the protection effect on the cable joint 3. Next, it is checked whether the sealing rubber ring 17 is properly installed to ensure that the device has good waterproof performance. Finally, it is checked whether the perfluorohexone fire extinguishing agent in the fire extinguishing agent storage cavity 2 is sufficient, and it is confirmed that the temperature sensing device 13 and the trigger 12 in the valve control mechanism 9 are in normal working condition.

[0030] During use, the temperature sensing device 13 continuously monitors the temperature at the cable joint 3. If the temperature rises abnormally, the temperature sensor 14 quickly transmits a signal to the control chip 15. After analysis and judgment, the control chip 15 sends a command to the trigger 12. Upon receiving the command, the trigger 12 responds quickly, compressing the spring 10 via electromagnetic triggering, thereby opening the valve plate 11. At this time, the perfluorohexanone extinguishing agent in the extinguishing agent storage chamber 2 is rapidly sprayed onto the cable joint 3 through the spray nozzle 8 and the nozzle 6, achieving an effective fire extinguishing effect.

[0031] Meanwhile, the fireproof and arc-resistant tape 16 can effectively isolate and prevent the spread of fire when abnormal high temperature or arcing occurs at the cable joint 3, further enhancing the safety performance of the device. The sealing rubber ring 17 ensures that the device maintains good waterproof performance even in harsh environments, preventing moisture ingress from affecting the normal operation of the device.

[0032] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not 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.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that modifications may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flexible explosion-proof fire extinguishing device for medium and high voltage cable joints (3), characterized in that: The device includes an explosion-proof housing (1), which has an extinguishing agent storage chamber (2) inside. The top of the explosion-proof housing (1) has an opening (4) adapted to the cable connector (3). The inner wall of the explosion-proof housing (1) has a spray hole (5) connected to the extinguishing agent storage chamber (2). The spray hole (5) is distributed around the inner wall of the explosion-proof housing (1) and a spray pipe (6) connected to the spray hole (5). The spray pipe (6) is arranged along the extension direction of the inner wall of the explosion-proof housing (1), and the end of the spray pipe (6) extends to the opening (4) of the explosion-proof housing (1) to form a spray ring (7) around the cable connector (3). The end of the spray ring (7) is provided with multiple spray ports (8). The spray ports (8) are evenly distributed around the spray ring (7). A valve control mechanism (9) is provided inside the spray port (8).

2. The flexible explosion-proof fire extinguishing device for medium and high voltage cable joints (3) according to claim 1, characterized in that: The valve control mechanism (9) includes a spring (10) and a valve plate (11) adapted to the injection port (8). The valve plate (11) is connected to the inner wall of the injection port (8) through the spring (10). One end of the spring (10) is connected to the valve plate (11), and the other end is connected to the inner wall of the injection port (8). The valve control mechanism (9) also includes a trigger (12), which is connected to the spring (10).

3. A flexible explosion-proof fire extinguishing device for medium and high voltage cable joints (3) according to claim 2, characterized in that: The valve control mechanism (9) also includes a temperature sensing device (13), which is connected to the trigger (12).

4. A flexible explosion-proof fire extinguishing device for medium and high voltage cable joints (3) according to claim 3, characterized in that: The temperature sensing device (13) includes a temperature sensor (14) and a control chip (15). The temperature sensor (14) is located outside the temperature sensing device (13), and the control chip (15) is electrically connected to the trigger (12).

5. The flexible explosion-proof fire extinguishing device for medium and high voltage cable joints (3) according to claim 4 is characterized in that: The trigger (12) is electromagnetically triggered.

6. A flexible explosion-proof fire extinguishing device for medium and high voltage cable joints (3) according to claim 1, characterized in that: Fireproof and arc-resistant tape (16) is wrapped around the outside of the joint of the explosion-proof housing (1).

7. A flexible explosion-proof fire extinguishing device for medium and high voltage cable joints (3) according to claim 1, characterized in that: The explosion-proof housing (1) is provided with a sealing rubber ring (17) for waterproofing at the joint.

8. A flexible explosion-proof fire extinguishing device for medium and high voltage cable joints (3) according to claim 1, characterized in that: The extinguishing agent stored in the extinguishing agent storage chamber (2) is perfluorohexanone.

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