Explosion-proof and anti-reignition composite structure applied to cable joint and preparation method thereof

Abstract

This application provides an explosion-proof and reignition-proof composite structure for cable joints. The aforementioned explosion-proof and reignition-proof composite structure for cable joints includes a tensile-resistant and weather-resistant membrane shell, a fire-retardant and heat-absorbing coating, and a flexible explosion-proof sealing assembly. The tensile-resistant and weather-resistant membrane shell has an explosion-proof sealing cavity. The fire-retardant and heat-absorbing coating covers the tensile-resistant and weather-resistant membrane shell. The flexible explosion-proof sealing assembly is disposed within the explosion-proof sealing cavity and connected to the tensile-resistant and weather-resistant membrane shell. The aforementioned explosion-proof and reignition-proof composite structure for cable joints has good fire-proof, explosion-proof, and reignition-proof effects.

Description

Technical Field

[0001] This invention relates to the field of cable protection technology, and in particular to an explosion-proof and flame-retardant composite structure for cable joints and its preparation method. Background Technology

[0002] A power supply system is a system that generates electrical energy and supplies and transmits it to electrical equipment, consisting of a power source system and a power transmission and distribution system. Power transmission and distribution systems are generally long-distance transmission and distribution systems. Long-distance power transmission uses long cable lines, which require cable joints to extend the cables. However, cable joints are often the most prone to fire, so fireproofing of cable joints is a key focus. Especially to meet the requirements of urban development planning, the use of cable tunnels is increasing. Furthermore, to save channel resources, the application of small-diameter tunnels and cable laying with ducts and cable wells is very common. While this brings convenience, it also presents many problems. Cable joints located in semi-enclosed or narrow spaces, such as those in tunnels, can generate enough heat and energy to threaten the surrounding cable lines, facilities, and personal safety when a fire, breakdown, or even explosion occurs at the cable joint, causing more serious secondary accidents. Therefore, there is an urgent need to provide an explosion-proof and re-ignition-proof composite structure for cable joints. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an explosion-proof and re-ignition-proof composite structure for cable joints with good fire resistance, explosion protection, and re-ignition prevention, as well as its preparation method.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] An explosion-proof and flame-retardant composite structure for cable joints, comprising:

[0006] A tensile and weather-resistant membrane-coated shell, wherein the tensile and weather-resistant membrane-coated shell has an explosion-proof sealing cavity;

[0007] A fire-resistant and heat-absorbing coating body, wherein the fire-resistant and heat-absorbing coating body is wrapped around the tensile and weather-resistant membrane shell;

[0008] A flexible explosion-proof sealing assembly is disposed within the explosion-proof sealing cavity and connected to the tensile and weather-resistant membrane covering shell.

[0009] In one embodiment, the fire-retardant and heat-absorbing coating is a perfluorohexanone coating.

[0010] In one embodiment, the flexible explosion-proof sealing assembly includes an explosion-proof flexible membrane, a high-temperature resistant and puncture-resistant flexible layer, and multiple fire-resistant sealing modules. The explosion-proof flexible membrane is disposed within the explosion-proof sealing cavity, and its outer periphery is connected to the tensile and weather-resistant membrane covering shell. The high-temperature resistant and puncture-resistant flexible layer is disposed within the explosion-proof sealing cavity, sandwiched between the explosion-proof flexible membrane and the tensile and weather-resistant membrane covering shell. Multiple fire-resistant sealing modules are spaced apart within the explosion-proof sealing cavity, with each fire-resistant module positioned on the side of the explosion-proof flexible membrane away from the high-temperature resistant and puncture-resistant flexible layer, and all fire-resistant sealing modules are sandwiched between the tensile and weather-resistant membrane covering shell and the explosion-proof flexible membrane.

[0011] In one embodiment, one side of the explosion-proof flexible membrane is connected to the tensile and weather-resistant membrane covering shell to form multiple sealing cavities, and multiple fireproof sealing modules are disposed in the multiple sealing cavities one by one.

[0012] In one embodiment, the high-temperature resistant flexible layer is a ceramic fiber blanket layer.

[0013] In one embodiment, the tensile and weather-resistant membrane covering shell is a fiberglass cloth covering shell.

[0014] In one embodiment, the tensile and weather-resistant membrane covering is a silicone-coated fiberglass cloth covering.

[0015] In one embodiment, the explosion-proof and reignition-proof composite structure applied to the cable joint further includes a strap assembly, which is movably connected to the tensile weather-resistant membrane covering shell, and the strap assembly is used to fit around the outer periphery of the tensile weather-resistant membrane covering shell when the tensile weather-resistant membrane covering shell is wound around the cable joint.

[0016] A method for preparing an explosion-proof and flame-retardant composite structure for cable joints, used to prepare the explosion-proof and flame-retardant composite structure for cable joints as described in any of the above embodiments.

[0017] Compared with the prior art, the present invention has at least the following advantages:

[0018] The explosion-proof and reignition-proof composite structure for cable joints of this invention allows a flexible explosion-proof sealing component to be disposed within the explosion-proof sealing cavity and connected to a tensile-resistant and weather-resistant membrane covering shell. This flexible explosion-proof sealing component effectively achieves the fire-proof and explosion-proof effects of the explosion-proof and reignition-proof composite structure applied to cable joints. The tensile-resistant and weather-resistant membrane covering shell has good tensile strength and weather resistance, thus protecting the flexible explosion-proof sealing component and mitigating the problem of reduced explosion-proof sealing effectiveness under long-term environmental influences. Furthermore, it reduces the risk of the tensile-resistant and weather-resistant membrane covering shell cracking during fire-resistant expansion of the flexible explosion-proof sealing component, preventing the component from scattering and reducing the explosion-proof sealing effect. This reduces the risk of fire and explosion, thus better ensuring the stability of the fireproof and explosion-proof composite structure used in cable joints. Furthermore, the fire-retardant heat-absorbing coating is applied over the tensile and weather-resistant membrane shell. This coating enhances the fireproof and heat-absorbing properties of the membrane shell. While the tensile and weather-resistant membrane shell and the flexible explosion-proof sealing components ensure the fireproof and explosion-proof sealing effect of the composite structure used in cable joints, the fire-retardant heat-absorbing coating further reduces heat transfer at the fire site, preventing the fire from spreading. This effectively achieves the fire-proof and explosion-proof effect of the composite structure used in cable joints. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of an explosion-proof and flame-retardant composite structure applied to a cable joint according to one embodiment of the present invention;

[0021] Figure 2 for Figure 1 The cross-sectional view shown is of an explosion-proof and flame-retardant composite structure applied to cable joints.

[0022] Figure 3 for Figure 2 The enlarged view of point A in the explosion-proof and flame-retardant composite structure applied to the cable joint is shown.

[0023] Figure 4 This is a flowchart illustrating a method for preparing an explosion-proof and flame-retardant composite structure for cable joints according to one embodiment of the present invention. Detailed Implementation

[0024] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] This application also provides an explosion-proof and flame-retardant-proof composite structure for cable joints. The aforementioned explosion-proof and flame-retardant-proof composite structure for cable joints and its preparation method include a tensile-resistant and weather-resistant membrane covering shell, a fire-retardant and heat-absorbing coating covering body, and a flexible explosion-proof sealing assembly. The tensile-resistant and weather-resistant membrane covering shell has an explosion-proof sealing cavity. The fire-retardant and heat-absorbing coating covering body is applied to the tensile-resistant and weather-resistant membrane covering shell. The flexible explosion-proof sealing assembly is disposed within the explosion-proof sealing cavity and connected to the tensile-resistant and weather-resistant membrane covering shell.

[0028] The aforementioned explosion-proof and reignition-proof composite structure applied to cable joints allows the flexible explosion-proof sealing component to be placed within the explosion-proof sealing cavity and connected to the tensile and weather-resistant membrane covering shell. The flexible explosion-proof sealing component effectively achieves the fire-proof and explosion-proof effects of the explosion-proof and reignition-proof composite structure applied to cable joints. The tensile and weather-resistant membrane covering shell has good tensile strength and weather resistance, thus protecting the flexible explosion-proof sealing component and mitigating the problem of reduced explosion-proof sealing effectiveness under long-term environmental influences. Furthermore, it reduces the risk of the tensile and weather-resistant membrane covering shell cracking during fire-resistant expansion of the flexible explosion-proof sealing component, preventing the component from scattering and reducing the explosion-proof sealing effect. This reduces the risk of fire and explosion, thus better ensuring the stability of the fireproof and explosion-proof composite structure used in cable joints. Furthermore, the fire-retardant heat-absorbing coating is applied over the tensile and weather-resistant membrane shell. This coating enhances the fireproof and heat-absorbing properties of the membrane shell. While the tensile and weather-resistant membrane shell and the flexible explosion-proof sealing components ensure the fireproof and explosion-proof sealing effect of the composite structure used in cable joints, the fire-retardant heat-absorbing coating further reduces heat transfer at the fire site, preventing the fire from spreading. This effectively achieves the fire-proof and explosion-proof effect of the composite structure used in cable joints.

[0029] To better understand the explosion-proof and reignition-proof composite structure for cable joints of this application, the following further explanation is provided:

[0030] Please refer to the following: Figures 1 to 3 To better understand the explosion-proof and flame-retardant composite structure 10 for cable joints of this application, the following further explanation is provided:

[0031] One embodiment of the explosion-proof and reignition-proof composite structure 10 for cable joints includes a tensile and weather-resistant membrane covering shell 100, a fire-retardant and heat-absorbing coating covering body 200, and a flexible explosion-proof sealing assembly 300. The tensile and weather-resistant membrane covering shell 100 has an explosion-proof sealing cavity 101. The fire-retardant and heat-absorbing coating covering body 200 covers the tensile and weather-resistant membrane covering shell 100. The flexible explosion-proof sealing assembly 300 is disposed within the explosion-proof sealing cavity 101 and connected to the tensile and weather-resistant membrane covering shell 100.

[0032] The aforementioned explosion-proof and reignition-proof composite structure 10 applied to cable joints allows the flexible explosion-proof sealing component 300 to be disposed within the explosion-proof sealing cavity 101 and connected to the tensile and weather-resistant membrane covering shell 100. The flexible explosion-proof sealing component 300 effectively achieves the fire-proof and explosion-proof effect of the explosion-proof and reignition-proof composite structure 10 applied to cable joints. The tensile and weather-resistant membrane covering shell 100 has good tensile and weather-resistant properties, thus protecting the flexible explosion-proof sealing component 300. This mitigates the problem of reduced explosion-proof sealing effect of the flexible explosion-proof sealing component 300 under long-term environmental influences and reduces the risk of the tensile and weather-resistant membrane covering shell 100 cracking during fire-resistant expansion of the flexible explosion-proof sealing component 300, preventing the flexible explosion-proof sealing component 300 from scattering and thus avoiding explosion. The reduced sealing effect further ensures the fireproof and explosion-proof stability of the explosion-proof and reignition-proof composite structure 10 applied to cable joints. Furthermore, the fire-retardant heat-absorbing coating 200 is further applied to the tensile and weather-resistant membrane shell 100. The fire-retardant heat-absorbing coating 200 enhances the fireproof and heat-absorbing properties of the tensile and weather-resistant membrane shell 100. Thus, while the tensile and weather-resistant membrane shell 100 and the flexible explosion-proof sealing component 300 ensure the fireproof and explosion-proof sealing effect of the explosion-proof and reignition-proof composite structure 10 applied to cable joints, the fire-retardant heat-absorbing coating 200 further reduces heat transfer at the fire site, thus preventing the spread of fire. In one embodiment, the fire-retardant heat-absorbing coating is a perfluorohexanone coating. It is understandable that the perfluorohexane coating will vaporize and absorb heat during a fire. Combined with flexible explosion-proof sealing components, this effectively blocks heat transfer while further accelerating heat dissipation. Furthermore, the vaporization of the perfluorohexane coating forms a gas, diluting the oxygen concentration and effectively reducing heat diffusion from the fire point. This effectively achieves the anti-reignition effect of the explosion-proof and anti-reignition composite structure applied to cable joints. It is also understandable that the perfluorohexane coating is a coating structure formed by applying fluorine to perfluorohexane. Because perfluorohexane vaporizes and absorbs heat at relatively low temperatures, the explosion-proof and anti-reignition composite structure with perfluorohexane coating for cable joints can be used in semi-enclosed or confined spaces such as cable tunnels. This ensures the stability of the perfluorohexane coating and thus guarantees the anti-reignition effect of the explosion-proof and anti-reignition composite structure applied to cable joints in environments with already low temperatures and relatively sealed spaces.

[0033] It should be noted that if the explosion-proof and reignition-proof composite structure applied to cable joints does not have a perfluorohexanone coating, the heat at the cable joint is difficult to dissipate quickly, thus accumulating at the cable joint and rapidly aggravating the fire. This means that if the flexible explosion-proof sealing component does not expand and seal in time, the heat has already reached the ignition point of other cables, causing the fire to spread rapidly. Therefore, in this application, a perfluorohexanone coating is further provided, and this coating is applied to a tensile and weather-resistant membrane shell. Because the perfluorohexanone coating has a low boiling point, it ensures effective volatilization to dissipate heat and form a fire isolation layer when the fire generates heat. This effectively reduces the spread of the fire before the flexible explosion-proof sealing component provides fireproof sealing, thus ensuring the reignition-proof effect of the explosion-proof and reignition-proof composite structure applied to cable joints. It should also be noted that if the perfluorohexane coating is only placed on the side of the flexible explosion-proof sealing component near the cable joint, the perfluorohexane coating may evaporate completely or partially due to the heat of the fire before the heat reaches the flexible explosion-proof sealing component. This means the heat from the fire may not reach the flexible explosion-proof sealing component immediately, and the heat may only reach it after the perfluorohexane coating has been consumed. This significantly delays the fire-resistant expansion of the flexible explosion-proof sealing component, making it difficult for it to effectively seal the fire when a fire breaks out. Consequently, the heat and energy generated at the cable joint can spread rapidly, making it difficult to buy enough reaction time for fire rescue. Furthermore, if the perfluorohexane coating is placed inside the explosion-proof sealing cavity, the perfluorohexane coating will release gas when heated. The released gas will affect the rapid expansion and decomposition of the flexible explosion-proof sealing component, thus affecting the fire-resistant and fire-resistant properties of the explosion-proof and fire-resistant composite structure applied to the cable joint.

[0034] In one embodiment, the fire-retardant and heat-absorbing coating is a modified perfluorohexanone coating. It is understood that the modified perfluorohexanone coating has an increased boiling point, causing it to begin volatilizing at slightly higher temperatures to achieve fireproof and heat-insulating effects. This effectively improves the stability of the fire-retardant and heat-absorbing coating, thereby better ensuring the anti-reignition effect of the explosion-proof and anti-reignition composite structure applied to cable joints.

[0035] Please refer to the following: Figures 1 to 3In one embodiment, the flexible explosion-proof sealing assembly 300 includes an explosion-proof flexible membrane 310, a high-temperature resistant and puncture-resistant flexible layer 320, and a plurality of fireproof sealing modules 330. The explosion-proof flexible membrane 310 is disposed within the explosion-proof sealing cavity 101, and its outer periphery is connected to the tensile and weather-resistant membrane covering shell 100. The high-temperature resistant and puncture-resistant flexible layer 320 is disposed within the explosion-proof sealing cavity 101, and is sandwiched between the explosion-proof flexible membrane 310 and the tensile and weather-resistant membrane covering shell 100. The plurality of fireproof sealing modules 330 are spaced apart within the explosion-proof sealing cavity 101, and are disposed on the side of the explosion-proof flexible membrane 310 away from the high-temperature resistant and puncture-resistant flexible layer 320, and are all sandwiched between the tensile and weather-resistant membrane covering shell 100 and the explosion-proof flexible membrane 310. Understandably, fireproofing and heat insulation structures for cable joints are typically flexible to ensure effective coverage and protection. These structures are designed to bend and fit snugly against the cable joint, making it difficult to integrate a single fire-sealing module. Therefore, fire-resistant expanded vermiculite or flexible, high-temperature resistant fire-resistant materials are often chosen for this purpose. However, fire-resistant expanded vermiculite and flexible, high-temperature resistant fire-resistant materials are less effective than fire-sealing modules. The fireproof and heat-insulating effect of the 30 is poor. Therefore, in order to effectively improve the fireproof performance of the structure applied to the fireproof and heat-insulating structure of the cable joint, in this application, multiple fireproof sealing modules 330 are spaced apart in the explosion-proof sealing cavity 101. The fireproof sealing modules 330 are fixed by the cavity limit, which ensures the connection stability of the fireproof sealing modules 330. In addition, the gap between the multiple fireproof sealing modules 330 allows the multiple fireproof sealing modules 330 to be bent, thereby effectively realizing the fireproof sealing effect of the explosion-proof and anti-reignition composite structure 10 applied to the cable joint.

[0036] It is also understandable that, due to the dense arrangement of cable joints in small-diameter tunnels and cable wells, if an arc breakdown occurs at one cable joint, the heat and energy generated at the joint can quickly spread the fire to surrounding cable lines and facilities. Furthermore, cables in small-diameter tunnels and cable wells are often located underground or in locations difficult to detect quickly, meaning that fires at cable joints are difficult to detect immediately. This can lead to delays in fire response, potentially causing larger fires or even more serious secondary accidents, threatening personal safety. Therefore, in this application, the high-temperature resistant flexible layer 320 is placed within the explosion-proof sealing cavity 101, sandwiched between the explosion-proof flexible membrane 310 and the tensile and weather-resistant membrane covering shell 100. Because the high-temperature resistant flexible layer 320 has good high-temperature resistance and arc breakdown resistance, it slows the rapid spread of heat and energy generated at the cable joint, buying time for fire rescue. Furthermore, the combined effect of multiple fire-stopping modules 330 expanding and sealing under high temperatures enhances the fire-stopping effect, further slowing the spread of heat and energy at the cable joint and providing more reaction time for fire rescue. Moreover, the vaporization and heat absorption of the fire-resistant heat-absorbing coating 200 further slows the spread of heat and energy at the cable joint. Additionally, the explosion-proof flexible membrane 310 effectively achieves the explosion-proof function of the explosion-proof and anti-reignition composite structure 10 applied to the cable joint, effectively preventing explosions caused by excessive heat and large impacts at the cable joint. Thus, the tensile and weather-resistant membrane shell 100, the fire-resistant heat-absorbing coating 200, the explosion-proof flexible membrane 310, the high-temperature puncture-resistant flexible layer, and the multiple fire-stopping modules 330 work together to ensure explosion-proof and anti-reignition effects, effectively slowing the spread of fire to surrounding cable lines and facilities and providing more reaction time for fire rescue.

[0037] It should be noted that the fire-resistant expansion function of the fire-stopping module 330 needs to be achieved through gradual expansion and decomposition under high temperature. That is, when a large amount of heat and energy is generated at the moment of arc breakdown, the fire-stopping module 330 is unlikely to expand and block heat transfer and retard flames instantly. If the explosion-proof flexible membrane 310 and the high-temperature breakdown resistant flexible layer 320 are not installed, the large amount of heat and energy generated at the moment of arc breakdown will cause the fire to spread rapidly. If the explosion-proof flexible membrane 310 and the high-temperature breakdown resistant flexible layer 320 achieve the large amount of heat and energy generated at the moment of arc breakdown, but the fire-stopping module 330 is not installed to expand, seal, insulate, and retard flames, the explosion-proof flexible membrane 310 and the high-temperature breakdown resistant flexible layer 320 will burn rapidly under continuous high temperature, making it difficult to achieve a good and sustained fire-resistant effect, and making it difficult to slow down the spread of fire to the surrounding cable lines and facilities.

[0038] Please refer to the following: Figures 1 to 3 In one embodiment, one side of the explosion-proof flexible membrane 310 is connected to the tensile and weather-resistant membrane covering shell 100 to form multiple sealing cavities 102, and multiple fireproof sealing modules 330 are correspondingly disposed within the multiple sealing cavities 102. It is understood that if adhesives such as polymer resins are used to fix the fireproof sealing modules 330, the adhesives will fuel combustion and exacerbate the fire in the event of a fire. Therefore, to reduce the use of adhesives, in this application, one side of the explosion-proof flexible membrane 310 is connected to the tensile and weather-resistant membrane covering shell 100 to form multiple sealing cavities 102, and the multiple fireproof sealing modules 330 are correspondingly disposed within the multiple sealing cavities 102. This ensures that the formed sealing cavities 102 restrict and fix the placement position of the fireproof sealing modules 330, effectively achieving the stability of the fireproof sealing modules 330 while avoiding exacerbating the fire, thereby ensuring the stability of the fireproof sealing effect of the explosion-proof and anti-reignition composite structure 10 applied to cable joints.

[0039] In one embodiment, the high-temperature breakdown resistant flexible layer is a ceramic fiber blanket layer. It is understood that the ceramic fiber blanket layer has good high-temperature resistance and resistance to instantaneous arc breakdown, which, combined with the fireproof sealing module and explosion-proof flexible membrane, effectively delays the rapid spread of heat and energy generated at the cable joint, buying valuable reaction time for fire rescue.

[0040] In one embodiment, the thickness of the ceramic fiber blanket is greater than 3cm, which effectively ensures the high temperature resistance and anti-arc instantaneous breakdown effect of the ceramic fiber blanket. In conjunction with the fireproof sealing module and the explosion-proof flexible membrane, it effectively delays the rapid spread of heat and energy generated at the cable joint, thus buying time for fire rescue.

[0041] In one embodiment, the tensile and weather-resistant membrane covering shell is a fiberglass cloth covering shell. It is understood that the fiberglass cloth covering shell has good tensile and weather-resistant properties, thus better achieving the tensile and weather-resistant properties of the explosion-proof and anti-reignition composite structure applied to cable joints, that is, better ensuring the structural stability of the explosion-proof and anti-reignition composite structure applied to cable joints.

[0042] In one embodiment, the tensile and weather-resistant membrane covering is a silicone-coated fiberglass cloth covering. It is understood that the silicone-coated fiberglass cloth covering has better tensile and weather-resistant properties, and the silicone on the covering contains ketone carbonyl groups, while the perfluorohexanone coating also contains ketone carbonyl groups. This results in good compatibility between the tensile and weather-resistant membrane covering and the perfluorohexanone coating, better ensuring the anti-reignition effect of the explosion-proof and anti-reignition composite structure applied to cable joints.

[0043] In one embodiment, the explosion-proof and reignition-proof composite structure applied to the cable joint further includes a binding strap assembly. The binding strap assembly is movably connected to the tensile and weather-resistant membrane covering shell, and the binding strap assembly is used to sleeve on the outer periphery of the tensile and weather-resistant membrane covering shell when the tensile and weather-resistant membrane covering shell is wound around the cable joint. This better ensures the fixed stability of the explosion-proof and reignition-proof composite structure applied to the cable joint at the cable joint, and thus better ensures the fireproof, explosion-proof and reignition-proof effects of the explosion-proof and reignition-proof composite structure applied to the cable joint.

[0044] In one embodiment, the binding assembly includes binding straps and multiple buckles. The multiple buckles are arranged sequentially and at intervals on the tensile and weather-resistant membrane covering shell, and each of the multiple buckles is connected to the tensile and weather-resistant membrane covering shell. The binding straps are threaded through the multiple buckles. The binding straps are used to fit around the outer periphery of the tensile and weather-resistant membrane covering shell when it is wound around the cable joint, further ensuring the fixation stability of the explosion-proof and anti-reignition composite structure applied to the cable joint at the cable joint, thereby better ensuring the fireproof, explosion-proof and anti-reignition effect of the explosion-proof and anti-reignition composite structure applied to the cable joint.

[0045] In one embodiment, the strap includes a fastening part and a loop part connected together. The fastening part is used to fasten to the loop part when the tensile weather-resistant membrane covering shell is wound around the cable joint, which further ensures the fixing stability of the explosion-proof and anti-reignition composite structure applied to the cable joint at the cable joint, thereby better ensuring the fireproof, explosion-proof and anti-reignition effect of the explosion-proof and anti-reignition composite structure applied to the cable joint.

[0046] In one embodiment, the fireproof sealing module is a polyurethane intumescent sealing module.

[0047] In one embodiment, the fire-stopping module may be the fire-stopping module described in CN112552671A, the fire-stopping block described in CN108774388A, the fire-stopping sheet described in CN112625206A, or the fire-stopping module described in CN209556835U.

[0048] This application also provides a method for preparing an explosion-proof and reignition-proof composite structure for cable joints. One embodiment of the method for preparing an explosion-proof and reignition-proof composite structure for cable joints is used to obtain the explosion-proof and reignition-proof composite structure for cable joints according to any of the above embodiments. Further, in this embodiment, the explosion-proof and reignition-proof composite structure for cable joints and its preparation method include a tensile weather-resistant membrane covering shell, a fire-retardant and heat-absorbing coating covering body, and a flexible explosion-proof sealing assembly. The tensile weather-resistant membrane covering shell has an explosion-proof sealing cavity. The fire-retardant and heat-absorbing coating covering body covers the tensile weather-resistant membrane covering shell. The flexible explosion-proof sealing assembly is disposed within the explosion-proof sealing cavity and connected to the tensile weather-resistant membrane covering shell.

[0049] Please see Figure 4 In one embodiment, the method for preparing the explosion-proof and reignition-proof composite structure applied to the cable joint includes the following steps:

[0050] S100. Obtain a tensile-resistant weather-resistant membrane and a flexible explosion-proof sealing assembly. It can be understood that the tensile-resistant weather-resistant membrane has good tensile and weather-resistant properties, and the flexible explosion-proof sealing assembly has good fire-proof and explosion-proof sealing effects. Therefore, obtaining the tensile-resistant weather-resistant membrane and the flexible explosion-proof sealing assembly realizes the preparation of an explosion-proof and anti-reignition composite structure for cable joints, which has good weather resistance and structural stability, and is suitable for fire-proof and explosion-proof sealing.

[0051] S200 involves applying a fire-retardant and heat-absorbing coating to the tensile weather-resistant membrane, forming a fire-retardant and heat-absorbing coating on one side of the membrane. This fire-retardant and heat-absorbing coating, combined with flexible explosion-proof sealing components, effectively blocks heat transfer while further accelerating heat dissipation, thus achieving a better anti-reignition effect in the explosion-proof and anti-reignition composite structure applied to cable joints.

[0052] S300, an outer wrapping operation is performed on the tensile weather-resistant membrane and the flexible explosion-proof sealing component, so that the tensile weather-resistant membrane covers the outside of the flexible explosion-proof sealing component, and the fire-retardant heat-absorbing coating is located on the outer periphery of the tensile weather-resistant membrane, resulting in an explosion-proof and anti-reignition composite structure for cable joints. It is understandable that by covering the flexible explosion-proof sealing component with a tensile weather-resistant membrane, the membrane shell provides protection, mitigating the reduction in explosion-proof sealing effectiveness under long-term environmental influences. It also reduces the risk of the membrane rupturing during fire expansion, preventing the component from scattering and reducing its sealing effectiveness. This better ensures the stability of the fire-proof and explosion-proof composite structure used in cable joints. Furthermore, by placing a fire-retardant heat-absorbing coating on the outer periphery of the tensile weather-resistant membrane, the coating enhances its fire-retardant and heat-absorbing properties. While the membrane and the flexible explosion-proof sealing component ensure the fire-proof and explosion-proof sealing effect of the composite structure, the fire-retardant heat-absorbing coating further reduces heat transfer at the fire site, preventing the fire from spreading. This effectively achieves the anti-reignition effect of the composite structure used in cable joints.

[0053] The aforementioned method for preparing an explosion-proof and reignition-proof composite structure for cable joints involves covering a tensile-resistant and weather-resistant membrane onto the flexible explosion-proof sealing component, with a fire-retardant and heat-absorbing coating located on the outer periphery of the tensile-resistant and weather-resistant membrane. This method achieves the preparation of an explosion-proof and reignition-proof composite structure for cable joints. Furthermore, while ensuring the fire-proof and explosion-proof sealing effect of the composite structure, it further reduces heat transfer at the fire site, thus preventing the spread of fire. In one embodiment, obtaining the flexible explosion-proof sealing component specifically involves obtaining an explosion-proof flexible membrane, a high-temperature breakdown-resistant flexible layer, and multiple fire-resistant sealing modules.

[0054] In one embodiment, the external encapsulation operation of the tensile-resistant weather-resistant membrane and the flexible explosion-proof sealing assembly specifically includes the following steps:

[0055] The tensile weather-resistant film is folded and laminated to create a folded configuration.

[0056] The tensile and weather-resistant membrane after being folded and stacked is connected once so that the explosion-proof flexible membrane is sandwiched between the folded tensile and weather-resistant membranes.

[0057] A secondary connection process is performed on the tensile and weather-resistant membrane after the connection treatment to connect the explosion-proof flexible membrane with one of the tensile and weather-resistant membrane layers to form multiple sealing cavities.

[0058] The tensile and weather-resistant membrane after secondary connection is sealed and filled so that multiple fireproof sealing modules are installed in multiple sealing cavities in a one-to-one correspondence.

[0059] The tensile and weather-resistant membrane after sealing and filling is subjected to three connection processes so that the high-temperature breakdown flexible layer is placed on the side of the explosion-proof flexible membrane away from multiple fireproof sealing modules, and the high-temperature breakdown flexible layer is sandwiched between the explosion-proof flexible membrane and another tensile and weather-resistant membrane.

[0060] The aforementioned steps of externally coating the tensile weather-resistant membrane and the flexible explosion-proof sealing component effectively achieve the goal of coating the tensile weather-resistant membrane onto the flexible explosion-proof sealing component, with the fire-retardant and heat-absorbing coating located on the outer periphery of the tensile weather-resistant membrane. This effectively ensures the rapid preparation of the explosion-proof and anti-reignition composite structure applied to cable joints. Furthermore, it ensures that the prepared explosion-proof and anti-reignition composite structure applied to cable joints, while maintaining the fire-proof and explosion-proof sealing effect, further reduces the heat transfer at the fire site, thus preventing the spread of fire. In other words, it further effectively achieves the anti-reignition effect of the explosion-proof and anti-reignition composite structure applied to cable joints.

[0061] In one embodiment, after the step of performing a three-stage connection process on the tensile weather-resistant membrane after the sealing and filling treatment, the method for preparing the explosion-proof and anti-reignition composite structure applied to the cable joint further includes the following step: performing an outer peripheral connection process on the tensile weather-resistant membrane after the three-stage connection treatment, so that the outer peripheral layers of the folded tensile weather-resistant membrane and the explosion-proof flexible membrane are stacked and connected, effectively ensuring the ease of preparation of the explosion-proof and anti-reignition composite structure applied to the cable joint, and effectively ensuring the protective effect of the tensile weather-resistant membrane on the explosion-proof flexible membrane, the high-temperature resistant flexible layer and multiple fireproof sealing modules, thereby ensuring the fireproof, explosion-proof and anti-reignition effect of the explosion-proof and anti-reignition composite structure applied to the cable joint.

[0062] In one embodiment, the fire-retardant and heat-absorbing coating operation of the tensile weather-resistant membrane includes the following steps:

[0063] The tensile weather-resistant membrane is subjected to silicone impregnation treatment to cover the surface of the tensile weather-resistant membrane with silicone;

[0064] The tensile and weather-resistant film after silicone impregnation is subjected to preliminary drying treatment to make the tensile and weather-resistant film semi-wet.

[0065] The tensile weather-resistant film after preliminary drying is coated with a fire-retardant and heat-absorbing coating so that the side of the tensile weather-resistant film containing silicone is coated with a fire-retardant and heat-absorbing coating.

[0066] The tensile and weather-resistant film after fire-retardant and heat-absorbing coating treatment is dried.

[0067] It is understandable that coating a fire-retardant and heat-absorbing coating onto a semi-wet tensile and weather-resistant membrane effectively improves the adhesion stability of the fire-retardant and heat-absorbing coating onto the tensile and weather-resistant membrane, thereby better ensuring the anti-reignition effect of the explosion-proof and anti-reignition composite structure applied to cable joints.

[0068] In one embodiment, the tensile and weather-resistant membrane after the folded and laminated treatment is subjected to a connection process, specifically: the explosion-proof flexible membrane is sandwiched between the tensile and weather-resistant membranes after the folded and laminated treatment, and then the outer periphery of the explosion-proof flexible membrane sandwiched between the tensile and weather-resistant membranes after the folded and laminated treatment is partially sewn together.

[0069] In one embodiment, the tensile and weather-resistant membrane after the connection process is subjected to a secondary connection process, specifically: the explosion-proof flexible membrane is linearly and intermittently stitched to one of the tensile and weather-resistant membrane layers.

[0070] In one embodiment, the tensile and weather-resistant membrane after sealing and filling is subjected to a three-stage connection process, specifically: a high-temperature resistant flexible layer is placed between the explosion-proof flexible membrane and another tensile and weather-resistant membrane for a limiting connection.

[0071] Compared with the prior art, the present invention has at least the following advantages:

[0072] The explosion-proof and reignition-proof composite structure 10 for cable joints of the present invention allows the flexible explosion-proof sealing component 300 to be disposed within the explosion-proof sealing cavity 102101 of the sealing cavity 102 and connected to the tensile and weather-resistant membrane covering shell 100. The flexible explosion-proof sealing component 300 effectively achieves the fire-proof and explosion-proof effect of the explosion-proof and reignition-proof composite structure 10 for cable joints. The tensile and weather-resistant membrane covering shell 100 has good tensile and weather-resistant properties, thus protecting the flexible explosion-proof sealing component 300 and mitigating the problem of reduced explosion-proof sealing effect of the flexible explosion-proof sealing component 300 under long-term environmental influences. Furthermore, it reduces the risk of cracking of the tensile and weather-resistant membrane covering shell 100 during fire-resistant expansion of the flexible explosion-proof sealing component 300, preventing damage to the flexible explosion-proof sealing component 300. The problem of reduced explosion-proof sealing effect due to scattering is addressed, thus better ensuring the fireproof and explosion-proof stability of the explosion-proof and anti-reignition composite structure 10 applied to cable joints. Furthermore, the fire-retardant heat-absorbing coating 200 is further wrapped around the tensile and weather-resistant membrane shell 100. The fire-retardant heat-absorbing coating 200 enhances the fire-retardant and heat-absorbing performance of the tensile and weather-resistant membrane shell 100. Therefore, while the tensile and weather-resistant membrane shell 100 and the flexible explosion-proof sealing component 300 ensure the fireproof and explosion-proof sealing effect of the explosion-proof and anti-reignition composite structure 10 applied to cable joints, the fire-retardant heat-absorbing coating 200 further reduces heat transfer at the fire site, thus effectively achieving the anti-reignition effect of the explosion-proof and anti-reignition composite structure 10 applied to cable joints.

[0073] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An explosion-proof and reignition-proof composite structure for cable joints, characterized in that, include: A tensile and weather-resistant membrane-coated shell, wherein the tensile and weather-resistant membrane-coated shell has an explosion-proof sealing cavity; A fire-resistant and heat-absorbing coating body, wherein the fire-resistant and heat-absorbing coating body is wrapped around the tensile and weather-resistant membrane shell; A flexible explosion-proof sealing assembly, wherein the flexible explosion-proof sealing assembly is disposed within the explosion-proof sealing cavity and connected to the tensile and weather-resistant membrane covering shell; The flexible explosion-proof sealing assembly includes an explosion-proof flexible membrane, a high-temperature resistant and puncture-resistant flexible layer, and multiple fire-resistant sealing modules. The explosion-proof flexible membrane is disposed within the explosion-proof sealing cavity, and its outer periphery is connected to the tensile and weather-resistant membrane covering shell. The high-temperature resistant and puncture-resistant flexible layer is disposed within the explosion-proof sealing cavity, and is sandwiched between the explosion-proof flexible membrane and the tensile and weather-resistant membrane covering shell. The multiple fire-resistant sealing modules are spaced apart within the explosion-proof sealing cavity, and are disposed on the side of the explosion-proof flexible membrane away from the high-temperature resistant and puncture-resistant flexible layer, and are all sandwiched between the tensile and weather-resistant membrane covering shell and the explosion-proof flexible membrane.

2. The explosion-proof and reignition-proof composite structure for cable joints according to claim 1, characterized in that, The fire-retardant and heat-absorbing coating is a perfluorohexanone coating.

3. The explosion-proof and reignition-proof composite structure for cable joints according to claim 1, characterized in that, One side of the explosion-proof flexible membrane is connected to the tensile and weather-resistant membrane covering shell to form multiple sealing cavities, and multiple fireproof sealing modules are arranged one-to-one in the multiple sealing cavities.

4. The explosion-proof and reignition-proof composite structure for cable joints according to claim 1, characterized in that, The explosion-proof flexible membrane is Kevlar aramid fiber cloth.

5. The explosion-proof and reignition-proof composite structure for cable joints according to claim 1, characterized in that, The high-temperature resistant and puncture-resistant flexible layer is a ceramic fiber blanket layer.

6. The explosion-proof and reignition-proof composite structure for cable joints according to claim 1, characterized in that, The tensile and weather-resistant membrane coating shell is a fiberglass cloth coating shell.

7. The explosion-proof and reignition-proof composite structure for cable joints according to claim 1, characterized in that, The tensile and weather-resistant membrane coating is a silicone fiberglass cloth coating.

8. The explosion-proof and reignition-proof composite structure for cable joints according to any one of claims 1 to 7, characterized in that, The explosion-proof and reignition-proof composite structure applied to the cable joint also includes a binding strap assembly, which is movably connected to the tensile and weather-resistant membrane covering shell, and the binding strap assembly is used to sleeve the outer periphery of the tensile and weather-resistant membrane covering shell when the tensile and weather-resistant membrane covering shell is wound around the cable joint.

9. A method for preparing an explosion-proof and reignition-proof composite structure for cable joints, characterized in that, Used to prepare the explosion-proof and flame-retardant composite structure for cable joints as described in any one of claims 1 to 8.

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