Fire-fighting flexible suppression pipe

Abstract

The utility model discloses a fire-fighting flexible suppression pipe which comprises a bottom sealing assembly, a thermosensitive pipe and an end sealing assembly, one end of the thermosensitive pipe is provided with the bottom sealing assembly, and the other end of the thermosensitive pipe is provided with the end sealing assembly. The pipe has the advantages that the metal wires are embedded in the two ends of the pipe body, the metal wires are heated through electromagnetic induction to melt the plastic pipe, the pipe body and the sealing pieces at the two ends are welded, and the leakage risk at the joint of the two ends of the pipe body is avoided; the high-precision fluorine ion detection probe is arranged at one end of the pipe body and used for detecting the content of fluorine ions around the pipe body, on one hand, slow fluorine leakage possibly caused by long-term placement is detected, and on the other hand, the high-precision fluorine ion detection probe and a battery pipeline system can be used for judging the storage state of the pipe.

Description

Technical Field

[0001] The utility model relates to an electric submersible pump for oil production, in particular to a flexible fire suppression pipe, belonging to the technical field of electric submersible pumps. Background Technique

[0002] Nowadays, lithium-ion battery-related products are widely used in modern commercial, automotive, industrial and other fields. Due to the complex manufacturing process and high energy density of lithium-ion batteries, when improper use or other extreme situations occur, the internal temperature of the battery cell will rise sharply, leading to thermal runaway, and then rapidly spread to adjacent battery cells through heat transfer, further causing thermal propagation. If not effectively controlled, this chain reaction may ultimately lead to fire or even explosion, posing a major threat to personnel safety. Therefore, an effective fire extinguishing device or system is crucial for ensuring the safe operation of energy storage devices.

[0003] The mainstream technical methods adopted by related fire extinguishing devices include gas fire extinguishing, water spraying fire extinguishing, foam fire extinguishing, etc. In terms of scheme layout, they are divided into in-battery-pack fire protection, out-of-battery-pack non-pipe network type and pipe network type fire protection. Among them, in-battery-pack fire protection mainly includes perfluorohexanone fire protection and aerosol. Currently, the perfluorohexanone fire protection flexible suppression pipe equipment is widely used for in-battery-pack or out-of-battery-pack fire protection due to its advantages such as high cost performance, maintenance-free, long service life, and no need for additional reagent storage tanks.

[0004] Currently, the perfluorohexanone fire protection flexible suppression pipe mainly consists of a composite plastic pipe and a fire extinguishing agent. Pressure gauges and signal feedback devices are respectively arranged at both ends of the pipe. When the temperature in the protected area reaches a certain level, the pressure in the pipe increases to reach the pipe body rupture pressure, releasing the fire extinguishing agent, and suppressing the flame through cooling and chemical reactions.

[0005] In the existing manufacturing process, the sealing of the pipe body is achieved through the threads and sealing rings of the end plugs. On the one hand, due to the sealing method of the threads and sealing rings, it is impossible to achieve zero leakage of the fire extinguishing agent. In addition, the fire extinguishing agent is in a gaseous state at high temperatures, and gases are more likely to leak. On the other hand, lithium-ion battery packs and other products often need to be used for several years. The long-term storage makes the sealing rings prone to aging and failure, etc., resulting in the risk of slow leakage of the fire extinguishing agent, and ultimately the failure of the fire protection flexible suppression pipe, which greatly increases the safety risks of lithium-ion battery packs and other products. Therefore, a fire protection flexible suppression pipe is proposed for the above problems. Content of the Utility Model

[0006] The purpose of the utility model is to provide a fire protection flexible suppression pipe to solve the above problems.

[0007] The present utility model realizes the above object through the following technical solutions. A flexible fire suppression pipe includes a bottom sealing assembly, a thermal-sensitive pipe, and an end sealing assembly. One end of the thermal-sensitive pipe is provided with a bottom sealing assembly, and the other end of the thermal-sensitive pipe is provided with an end sealing assembly;

[0008] The bottom sealing assembly includes a bottom seal and a first wire coil, and the first wire coil is placed inside the bottom seal;

[0009] The end sealing assembly includes an end seal, a wire coil, and a high-precision fluoride ion detection probe. The second wire coil is placed inside the end seal, and a one-way liquid injection pipe is inserted into the space inside the second wire coil. The high-precision fluoride ion detection probe is installed at the end face of the end seal.

[0010] Preferably, both the first wire coil and the second wire coil form an electromagnetic induction heating structure through an energized current.

[0011] Preferably, the connections between the two ends of the thermal-sensitive pipe and the bottom sealing assembly and the end sealing assembly respectively are both in the form of fusion cooling welding.

[0012] Preferably, a one-way check structure is provided inside the thermal-sensitive pipe, and the one-way check structure is specifically composed of a push sealing block and a spring.

[0013] Preferably, the high-precision fluoride ion detection probe adopts the fluoride ion selective electrode method combined with a specially designed low-drift noise reduction isolation amplifier circuit.

[0014] Preferably, the high-precision fluoride ion detection probe should also be connected to the battery management system, and the high-precision fluoride ion detection probe sends the detection value to the battery management system every once in a while.

[0015] Compared with the prior art, the advantages of the present utility model are as follows: Metal wires are buried inside both ends of the pipe body, and the electromagnetic induction is used to heat the metal wires to melt the plastic pipe to weld the pipe body with the end seals, avoiding the leakage risk at the joints of both ends of the pipe body; A high-precision fluoride ion detection probe is provided at one end of the pipe body to detect the fluoride ion content around the pipe body. On the one hand, it detects the slow fluoride leakage that may occur during long-term storage, and on the other hand, it can also be used together with the battery pipeline system to judge the storage state of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 This is a three-dimensional view of the overall structure of the present utility model;

[0018] Figure 2 This is a schematic diagram of the bottom seal assembly structure of the present utility model;

[0019] Figure 3 This is a schematic diagram of the end seal assembly structure of the present utility model;

[0020] Figure 4 This is the operating principle diagram of the high-precision fluoride ion detection probe of the present utility model;

[0021] Figure 5 This is a schematic diagram of the operating principle of the internal structure of the thermal tube of the present utility model.

[0022] In the figure: 100, bottom seal assembly; 110, bottom seal; 120, first wire ring; 200, thermal tube; 300, end seal assembly; 310, end seal; 311, one-way liquid injection tube; 320, second wire ring; 330, high-precision fluoride ion detection probe. Detailed implementation manners

[0023] In order to make the objectives, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the embodiments described below are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0024] The technical solutions of the present utility model will be further described below in conjunction with the accompanying drawings and through specific implementation manners.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0026] Please refer to Figures 1-5 As shown, a flexible fire suppression tube includes a bottom seal assembly 100, a thermal tube 200, and an end seal assembly 300. One end of the thermal tube 200 is provided with a bottom seal assembly 100, and the other end of the thermal tube 200 is provided with an end seal assembly 300;

[0027] The bottom sealing assembly 100 includes a bottom seal 110 and a first wire ring 120, and the first wire ring 120 is placed inside the bottom seal 110;

[0028] The end sealing assembly 300 includes an end seal 310, a wire ring, and a high-precision fluoride ion detection probe 330. The second wire ring 320 is placed inside the end seal 310, and a one-way liquid injection tube 311 is inserted into the space inside the second wire ring 320. The high-precision fluoride ion detection probe 330 is installed at the end face of the end seal 310.

[0029] Both the first wire ring 120 and the second wire ring 320 form an electromagnetic induction heating structure through the energized current. The connections between both ends of the thermosensitive tube 200 and the bottom sealing assembly 100 and the end sealing assembly 300 are both in the form of fusion cooling welding;

[0030] The principle of electromagnetic induction heating of the wire is as follows: The induction heating power supply converts the AC power supply into an alternating current with a higher frequency and transmits it to the induction coil, which will generate an electromagnetic field inside the induction coil. Since the first wire ring 120 and the second wire ring 320 to be heated are also conductors, the magnetic induction lines generated by the induction coil will directly penetrate the first wire ring 120 and the second wire ring 320 placed in the coil, forming current closed loops. Moreover, the resistance of the metal is small, and with a relatively high current, when these high-current magnetic induction lines pass through the first wire ring 120 and the second wire ring 320, the electrons inside the metal will become very active, collide with each other, and generate heat through friction, achieving the effect of quickly heating the built-in wire rings 120 and 320 themselves;

[0031] Put the inserted parts into the induction heating power supply equipment, and use electromagnetic induction to quickly heat the first wire ring 120 and the second wire ring 320, melt the contact areas between the bottom seal 110 and the end seal 310 and the thermosensitive tube 200, and further, after cooling, achieve the purpose of welding the three components into one. This welding method can ensure absolute sealing before stress damage occurs to the material and prevent the leakage of the fire extinguishing agent.

[0032] The internal of the thermal sensitive tube 200 is provided with a one-way check structure, and the one-way check structure is specifically composed of a push sealing block and a spring. When starting to fill the fire extinguishing agent into the thermal sensitive tube 200 from the liquid injection port, the fire extinguishing agent passes through the radial holes, applies pressure to the sealing block at the liquid injection port inside the tube, and pushes the sealing block to squeeze the connected spring to contract and open the flow channel, so that the fire extinguishing agent enters the thermal sensitive tube 200; when a certain amount of fire extinguishing agent is filled, the filling of the fire extinguishing agent is stopped. At this time, the sealing block loses pressure, and the spring rebounds to push the sealing block to reset and block the filling port, so as to achieve the effect of sealing the liquid injection tube. In addition, after the filling is completed, other forms of secondary sealing can also be carried out at the filling port, such as applying sealant, etc.

[0033] The high-precision fluoride ion detection probe 330 adopts the fluoride ion selective electrode method combined with a specially designed low-drift noise reduction isolation amplifier circuit. The high-precision fluoride ion detection probe 330 should also be connected to the battery management system, and the high-precision fluoride ion detection probe 330 sends the detection value to the battery management system every once in a while;

[0034] Its main operation logic is to eliminate the influence of other external factors such as temperature and humidity on the fluoride ion selective electrode, and the detection range of fluorine is 0.05 - 100 ppm, and the detection range of fluoride ion leakage concentration is 10-4mol / L - 10-1mol / L, and the detection accuracy can be controlled within 3.5%;

[0035] In another embodiment, such as Figure 4 , the high-precision fluoride ion detection probe 330 should also be connected to the battery management system. The detection probe 330 sends the detection value to the battery management system every once in a while. When the detection value is less than 10-4mol / L, it can be considered normal; when the detection value is 10-4mol / L - 10-2mol / L, it can be judged as a slight leakage, and the fire-fighting flexible suppression tube can be replaced; when the detection value is greater than 10-2mol / L, it can be judged that the fire-fighting flexible suppression tube has ruptured, and a thermal runaway fire has occurred in the battery pack or battery compartment, and further fire-fighting protection and personnel safety should be noted.

[0036] In summary, metal wires are buried inside both ends of the tube body, and electromagnetic induction heating is used to melt the plastic tube by heating the metal wires to weld the tube body and the sealing parts at both ends, avoiding the leakage risk at the joints at both ends of the tube body; a high-precision fluoride ion detection probe is arranged at one end of the tube body to detect the fluoride ion content around the tube body. On the one hand, it detects the slow fluoride leakage that may occur during long-term storage, and on the other hand, it can also be used together with the battery pipeline system to judge the storage state of the tube.

[0037] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the same elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0038] As described above, the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A flexible fire suppression pipe, characterized in that: It includes a bottom seal assembly (100), a thermal sensitive tube (200), an end seal assembly (300) and a second wire coil. One end of the thermal sensitive tube (200) is provided with the bottom seal assembly (100), and the other end of the thermal sensitive tube (200) is provided with the end seal assembly (300). The bottom seal assembly (100) includes a bottom seal (110) and a first wire coil (120), and the first wire coil (120) is placed inside the bottom seal (110). The end seal assembly (300) includes an end seal (310), a wire coil and a high-precision fluoride ion detection probe (330). The second wire coil (320) is placed inside the end seal (310), and a one-way liquid injection tube (311) is inserted into the space inside the second wire coil (320). The high-precision fluoride ion detection probe (330) is installed at the end face of the end seal (310).

2. The flexible fire suppression pipe according to claim 1, wherein: Both the first wire coil (120) and the second wire coil (320) form an electromagnetic induction heating structure through an energized current.

3. The flexible fire suppression pipe according to claim 1, characterized in that: The connections between both ends of the thermal sensitive tube (200) and the bottom seal assembly (100) and between the end seal assembly (300) are both in the form of fusion cooling welding.

4. A flexible fire suppression pipe according to claim 1, characterized in that: A one-way check structure is provided inside the thermal sensitive tube (200), and the one-way check structure is specifically composed of a push seal block and a spring.

5. A flexible fire suppression pipe according to claim 1, characterized in that: The high-precision fluoride ion detection probe (330) adopts a fluoride ion selective electrode method combined with a specially designed low-drift noise reduction isolation amplifier circuit.

6. The flexible fire suppression pipe according to claim 1, wherein: The high-precision fluoride ion detection probe (330) should also be connected to the battery management system, and the high-precision fluoride ion detection probe (330) sends the detection value to the battery management system at regular intervals.

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