TWI814348B - Cable assembly and fire-resistant quick connector thereof - Google Patents

Abstract

A fire-resistant quick connector includes a fire-resistant structure and a retaining connector. The fire-resistant structure has two open ends and an accommodating space located between and in communication with the two open ends. The retaining connector is disposed in the accommodating space and includes a conductive body and two retaining members connected as a whole to the conductive body. The two retaining members are respectively located in proximity to the two open ends and each include an attaching portion, an outer interfering portion and an inner interfering portion. The outer interfering portion and the inner interfering portion are fixed to the conductive body by the attaching portion. The outer interfering portion is arranged opposite to and separated from the inner interfering portion. The maximum vertical distance between the outer interfering portion and the attaching portion is greater than the maximum vertical distance between the inner interfering portion and the attaching portion. A cable assembly is further provided.

Description

Cable assembly and its fire-resistant quick connector

The invention relates to a cable splicing device, which belongs to the field of cable installation and accessories. In particular, it relates to a fire-resistant quick connector for cable splicing and a cable assembly using the fire-resistant quick connector.

Press, people have higher and higher requirements for the fire resistance (or flame resistance), safety and reliability of cables. Fire-resistant cables are widely used in automatic control, lighting, fire protection and some special occasions; due to the cable production process and on-site Due to the limitations of the use environment and other conditions, cable connection is inevitable during the installation and wiring process. A common connection method is to first connect two exposed core wires together by winding or pressing copper tubes, and then wrap them with insulating tape to avoid risks such as short circuits and leakage caused by exposed core wires.

However, insulating tape itself is not resistant to high temperatures, nor does it have the same fire-resistant properties as fire-resistant cables. It will soon carbonize and shatter in the high-temperature environment of a fire, and lose its original coating and insulation effect. Therefore, the connecting part of the cable is often the most fragile part of the structure and the most prone to insulation failure. Once a fire occurs, it can easily cause a major power outage, and may even cause major safety accidents and economic losses.

Therefore, how to solve the defects existing in the connection parts of fire-resistant cables and overcome the above-mentioned problems has become one of the focuses of attention of those with ordinary knowledge in the field.

The technical problem to be solved by the present invention is to provide a fire-resistant quick connector for cable splicing in view of the shortcomings of the existing technology. It has good fire-resistant performance, can withstand high temperatures above 950 ^° C, and has a cable bite and fixation function. Furthermore, a cable assembly using the fire-resistant quick connector is provided.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a fire-resistant quick connector, which includes a fire-resistant structure and a bite connector. The fire-resistant structure has two opposite open ends and a receiving space connected between the two open ends, and the snap-in connector is disposed in the receiving space. The snap-in connector includes an electrical conductor and two snap-in parts. The two snap-in parts are integrally connected to the conductor and are respectively located near the two open ends. Each of the bite pieces includes a mounting part, an outer interference part and an inner interference part. The outer interference part and the inner interference part are fixed on the conductor through the mounting part. The outer interference part The inner interference part is separated from and opposite to each other, and the outer interference part is closer to the corresponding opening end than the inner interference part; and the maximum vertical distance between the outer interference part and the mounting part is The distance is greater than the maximum vertical distance between the inner interference portion and the mounting portion.

In one embodiment of the present invention, the outer interference portion and the inner interference portion are each connected to the mounting portion through an elastic bending portion, and one of the outer interference portion and the inner interference portion is directed in one direction. It extends in a direction close to the other one of the outer interference part and the inner interference part and away from the mounting part.

In an embodiment of the present invention, the end of the inner interference portion is formed into an underhook structure.

In one embodiment of the present invention, the conductor is a conductive metal tube, which has two opposite conductor insertion openings and two hollow structures; the two conductor insertion openings are respectively aligned with the refractory structure. The two open ends, and the positions of the two hollow structures respectively correspond to the mounting portions of the two bite pieces.

In an embodiment of the present invention, the snap-in connector further includes two fixing parts, and the two fixing parts respectively pass through the mounting parts of the two snap-in parts and are respectively locked on the conductive parts. The two hollow structures of the body.

In an embodiment of the present invention, each of the hollow structures is a hollow groove and extends to the corresponding conductor insertion opening.

In an embodiment of the present invention, the refractory structure includes a refractory component, and the refractory component of the refractory structure is selected from the group consisting of magnesium oxide, aluminum oxide, zirconium oxide, magnesium hydroxide, aluminum hydroxide, and minerals. A group composed of talc and nanoclay.

In an embodiment of the present invention, the fire-resistant quick connector further includes an insulating jacket surrounding the snap-in connector.

In an embodiment of the present invention, the fire-resistant quick connector further includes an adhesive layer disposed between the insulating jacket and the fire-resistant structure, the adhesive layer includes an adhesive component and a fire-resistant component, and the adhesive layer The refractory component of the adhesive layer is selected from the group consisting of a flame retardant, nanoclay and α-zirconium phosphate.

In an embodiment of the present invention, the fire-resistant quick connector further includes a protective shell, a first cable fixing joint and a second cable fixing joint. The protective shell is used to accommodate the fire-resistant structure and the In the snap-in connector, the protective shell has two opposite interface ends respectively aligned with the two open ends of the fire-resistant structure, and the first cable fixing joint and the second cable fixing joint are respectively Joined to the two interface ends.

In order to solve the above technical problems, another technical solution adopted by the present invention is to provide a cable assembly, which includes a first cable, a second cable and the fire-resistant quick connector of the present invention with the above structure. A conductor of the first cable and a conductor of the second cable respectively enter the receiving space of the refractory structure from the two open ends of the refractory structure, and are fixedly connected to the snap-in connector; The conductor of the first cable and the conductor of the second cable each have structural interference with the outer interference portion and the inner interference portion of the corresponding bite piece; all the conductors of the first cable The conductor and the conductor of the second cable are electrically connected to each other through the conductor.

One of the beneficial effects of the present invention is that the fire-resistant quick connector of the present invention arranges the bite connector in the receiving space of the fire-resistant structure, so that the cable connection can also resist the invasion of high-temperature flames, ensuring that the cable can maintain a certain length in the event of a fire. Normal power supply at all times, so various communication, first aid and lighting equipment are still in normal use to reduce casualties and disaster losses.

In addition, relying on the special structural design of the snap-in connector, the fire-resistant quick connector of the present invention can form a stable and reliable fixed connection and electrical connection between two cables; when used in a cable assembly, it can effectively shorten the cable splicing work It saves time and facilitates maintenance and repair. At the same time, the cable can retain its original characteristics such as fire resistance.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and illustration and are not used to limit the present invention.

The following is a specific example to illustrate the implementation of the "cable assembly and its fire-resistant quick connector" disclosed in the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depictions based on actual dimensions, as is stated in advance. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of the present invention. In addition, the term "or" used in this article shall include any one or combination of more of the associated listed items depending on the actual situation.

[First Embodiment]

Referring to Figures 1 and 2 in conjunction with Figures 5 and 6, a first embodiment of the present invention provides a fire-resistant quick connector 1, which mainly includes a fire-resistant structure 11 and a bite connector 12. The fire-resistant structure 11 has two opposite open ends 111 and a receiving space 112 connected between the two open ends 111 . The snap-in connector 12 is disposed in the receiving space 112 . During use, the two cables to be connected (the first cable 2 and the second cable 3 as shown in FIGS. 5 and 6 ) can be inserted into the receiving space 112 of the fire-resistant structure 11 from the two open ends 111 of the fire-resistant structure 11 . , and forms a stable and reliable fixed connection and electrical connection between the two cables through the snap-in connector 12; the fire-resistant structure 11 has the ability to block flames and heat transfer, and still has good dimensional stability under high-temperature flame conditions properties, so the cable can supply power normally for a period of time in the event of a fire.

In this embodiment, the refractory structure 11 may be a tubular structure containing refractory components, wherein the refractory components may account for 93.5% to 98.5% of the total weight of the refractory structure 11. The refractory components are preferably selected from magnesium oxide and alumina. , a group consisting of zirconium oxide, magnesium hydroxide, aluminum hydroxide, mineral talc and nanoclay, but the invention is not limited thereto.

As shown in FIGS. 1 and 6 , the snap-in connector 12 includes a conductor 121 and two snap-in parts 122 . The two snap-in parts 122 are integrally connected to the conductor 121 and are respectively located near the two open ends 111 of the fire-resistant structure 11 . . Therefore, when the two cables to be connected enter the receiving space 112 of the fire-resistant structure 11, the two engaging parts 122 can engage and fix the conductors (such as cable core wires) of the two cables on the conductor 121, so that the two cables pass through the conductive body. The bodies 121 are electrically connected to each other. The conductor 121 and the two engaging parts 122 may be made of conductive metal, but are not limited thereto.

Specifically, as shown in FIG. 2 , each bite piece 122 includes a mounting portion 1221 , an outer interference portion 1222 and an inner interference portion 1223 . The outer interference portion 1222 and the inner interference portion 1223 are fixed to the conductor through the mounting portion 1221 . 121, wherein the outer interference portion 1222 and the inner interference portion 1223 are separated from each other and arranged oppositely, and the outer interference portion 1222 is closer to the corresponding opening end 111 than the inner interference portion 1223. It is worth mentioning that the maximum vertical distance D1 between the outer interference part 1222 and the mounting part 1221 is greater than the maximum vertical distance D2 between the inner interference part 1223 and the mounting part 1221 . Therefore, the outer interference portion 1222 and the inner interference portion 1223 can cooperate with each other to bite the conductor of the cable more firmly. The outer interference portion 1222 can push against the conductor of the cable, and the inner interference portion 1223 can exert a pushing effect on the conductor of the cable. Suppressive effect.

Furthermore, as shown in Figure 2, the outer interference portion 1222 and the inner interference portion 1223 are each connected to the mounting portion 1221 through an elastic bending portion 1224, 1225. The elastic bending portions 1224, 1225 are slightly C-shaped, and An underhook structure may be formed at the end of the inner interference portion 1223 . In addition, the outer interference portion 1222 and the inner interference portion 1223 respectively extend in a direction approaching each other, that is, one of the outer interference portion 1222 and the inner interference portion 1223 extends in a direction close to the other of the outer interference portion 1222 and the inner interference portion 1223 , and the extending directions of the outer interference portion 1222 and the inner interference portion 1223 are away from the mounting portion 1221 . When in use, the outer interference portion 1222 and the inner interference portion 1223 can respectively convert the elastic force of the elastic bending portions 1224 and 1225 into a bite force on the conductor of the cable.

In this embodiment, the conductor 121 can be a conductive metal tube, which has two opposite conductor insertion openings 1211 respectively aligned with the two open ends 111 of the refractory structure 11, and also has two hollow structures 1212 respectively located on both sides. The hollow structure 1212 may be a hollow groove corresponding to the mounting portion 1221 of the engaging member 122, which may extend to the corresponding conductor insertion opening 1211, but is not limited thereto. In some embodiments, the hollow structure 1212 may also be a hollow hole. On this basis, the snap-in connector 12 may further include two fixing members 123 (such as bolts) that pass through the mounting portions 1221 of the two snap-in members 122 and are respectively locked to the two hollow structures 1212 of the conductor 121, so as to The two engaging pieces 122 are fixed on the conductor 121 .

In actual application, each fixing part 123 may include a head 1231 and a threaded engaging part 1232 extending from one side of the head 1231, and the mounting part 1221 of each engaging part 122 may have a through hole H; During assembly, as shown in FIG. 2 , the head 1231 can be pressed against the mounting part 1221 (inside the mounting part 1221 ), and the joint part 1232 can be passed through the through hole H of the mounting part 1221 and can be removed from the hollow of the conductor 121 The structure 1212 is exposed, and the exposed portion of the joint portion 1232 can be tightened and fixed by a tightening member 124 (such as a nut). However, the above description is only one of the possible implementations of the present invention and is not intended to limit the present invention.

Referring again to Figures 1 and 6, the fire-resistant quick connector 1 of the present invention may further include an insulating jacket 13 surrounding the snap-in connector 12 to improve the insulation (electrical isolation) between the snap-in connector 12 and the outside world. performance), and prevent the snap-in connector 12 from being oxidized when exposed to air. The insulating jacket 13 may be made of heat shrinkable insulating material, but is not limited thereto.

In order to integrate the refractory structure 11 and the snap-in connector 12 into one body, the refractory quick connector 1 of the present invention may further include an adhesive layer 14 disposed between the insulating jacket 13 and the refractory structure 11 . In this embodiment, the adhesive component in the adhesive layer 14 has good adhesion to both the insulating jacket 13 and the fire-resistant structure 11. The adhesive component can be a synthetic resin composition, such as acrylate, polyurethane or epoxy resin. things, but not limited to this. Considering the fire resistance, the adhesive layer 14 may further include a refractory component, wherein the refractory component may account for 1% to 20% of the total weight of the adhesive layer 14. The refractory component is preferably selected from flame retardants (organic or inorganic flame retardants). ), nanoclay and α-zirconium phosphate, but the invention is not limited thereto.

It is worth mentioning that the refractory structure 11 and the adhesive layer 14 can cooperate with each other to produce a synergistic effect of blocking flames and heat transfer, and maintain the integrity of the overall structure while resisting flame attack (the phenomenon of structural disintegration will not occur) ), the adhesive layer 14 containing refractory components can be ceramicized in a high temperature environment to form a dense protective layer. Therefore, even in the event of a sudden fire, the fire-resistant quick connector 1 of the present invention can allow the cable to continue to provide normal power supply for a period of time to minimize damage. In addition, the adhesive layer 14 can also play a good role in insulation, buffering and support.

In some embodiments, as shown in FIG. 10 , the two open ends 111 of the refractory structure 11 may be respectively formed with a positioning flange 113 to ensure a stable combination between the refractory structure 11 and the snap-in connector 12 . In this embodiment, the positioning flange 113 avoids the location of the snap-in connector 12 and leaves room for cable insertion. Therefore, the snap-in connector 12 can be prevented from being detached from the fire-resistant structure 11 without affecting the cable connection.

Referring to Figures 3 to 5, the fire-resistant quick connector 1 of the present invention may further include a shell component 15 to reduce the negative impact of external environmental factors, protect the fire-resistant structure 11 from physical damage, and make the cable connection more convenient. Fast and stable. In this embodiment, the housing assembly 15 includes a protective housing 151, a first cable fixing joint 152 and a second cable fixing joint 153. The protective housing 151 is used to accommodate the fire-resistant structure 11 and the snap-in connector 12. The protective shell 151 has two opposite interface ends 1511 respectively aligned with the two open ends 111 of the fire-resistant structure 11 , and the first cable fixing joint 152 and the second cable fixing joint 153 are respectively joined to the two interface ends 1511 . During use, the two cables to be connected can be threaded through the first cable fixing joint 152 and the second cable fixing joint 153 respectively.

[Second Embodiment]

Referring to FIGS. 3 to 6 , a second embodiment of the present invention provides a cable assembly Z, which includes a fire-resistant quick connector 1 , a first cable 2 and a second cable 3 . The technical details of the fire-resistant quick connector 1 have been described in the first embodiment, so they will not be described again here. The first cable 2 includes a first conductor 21, and the second cable 3 includes a second conductor 31. The first conductor 21 and the second conductor 31 respectively enter the receiving space 112 of the fire-resistant structure 11 from the two open ends 111 of the fire-resistant structure 11. and is fixedly connected to the snap-in connector 12; wherein the first conductor 21 and the second conductor 31 each have structural interference with the corresponding outer interference portion 1222 and inner interference portion 1223 of the snap-in piece 122, while the first conductor 21 and the second The conductors 31 can be electrically connected to each other through the conductor 121 .

Referring to FIG. 9 , each of the first cable 2 and the second cable 3 may be a fire-resistant power cable, and the cable itself has fire-resistant properties. The first cable 2 may further include a first refractory layer 22 covering the first conductor 21 and a first insulation layer 23 covering the first refractory layer 22 . The first refractory layer 22 can be formed by using at least one refractory tape, such as mica tape, ceramic tape, or a combination thereof, to completely cover the first conductor 21 in a wrapping or longitudinal wrapping manner. According to actual needs, the first insulation layer 23 can be further covered with a first coating layer 24; the first coating layer 24 can be a polyvinyl chloride (PVC) layer or a cross-linked polyethylene (XLPE) layer, but not Limited to this. The second cable 3 may further include a second refractory layer 32 covering the second conductor 31 and a second insulation layer 33 covering the second refractory layer 32 . The second refractory layer 32 can be formed by using at least one refractory tape, such as mica tape, ceramic tape, or a combination thereof, to completely cover the second conductor 31 in a wrapping or longitudinal wrapping manner. According to actual needs, the second insulation layer 33 can be further covered with a second coating layer 34; the second coating layer 34 can be a polyvinyl chloride (PVC) layer or a cross-linked polyethylene (XLPE) layer, but not Limited to this. Therefore, the first cable 2 and the second cable 3 are more resistant to negative impacts caused by various external factors such as external impact, moisture, sunlight, organisms, etc.

Refer again to Figures 3 to 6, and as shown in Figures 2 and 7 to 9, when using the fire-resistant quick connector 1 to connect the first cable 2 and the second cable 3, you can first remove a section of the first cable 2 The outer sheath (such as the laminated structure of the first refractory layer 22, the first insulating layer 23 and the first coating layer 24) is exposed to a part of the first conductor 21, and a section of the outer sheath (such as the second refractory layer) of the second cable 3 is removed. 32. The stacked structure of the second insulating layer 33 and the second covering layer 34), so that a part of the second conductor 31 is exposed. Next, the first cable 2 is inserted into the first cable fixing joint 152 , and the second cable 3 is inserted into the second cable fixing joint 153 . Then, the first cable fixing joint 152 and the first cable fixing joint 152 are respectively joined to the two interface ends 1511 of the protective shell 151 , so that the exposed first conductor 21 and the exposed second conductor 31 enter the accommodation of the fire-resistant structure 11 in the space 112, and are respectively engaged and fixed on the conductor 121 by two engaging pieces 122 to complete the cable connection.

During the connection process, the exposed first conductor 21 and the exposed second conductor 31 each have structural interference with the corresponding outer interference portion 1222 and inner interference portion 1223 of the bite piece 122 . Specifically, the outer interference portion 1222 can convert the elastic force of the elastic bending portion 1224 into a bite force to push against the exposed first conductor 21 or the exposed second conductor 31 , while the inner interference portion 1223 can convert the elastic force of the elastic bending portion 1224 into a bite force. The elastic force of the bent portion 1225 is converted into a bite force to exert a pressing effect on the exposed first conductor 21 or the exposed second conductor 31 .

[Beneficial effects of the embodiment]

One of the beneficial effects of the present invention is that the fire-resistant quick connector of the present invention arranges the bite connector in the receiving space of the fire-resistant structure, so that the cable connection can also resist the invasion of high-temperature flames, ensuring that the cable can maintain a certain length in the event of a fire. Normal power supply at all times, so various communication, first aid and lighting equipment are still in normal use to reduce casualties and disaster losses.

In addition, relying on the special structural design of the snap-in connector, the fire-resistant quick connector of the present invention can form a stable and reliable fixed connection and electrical connection between two cables; when used in a cable assembly, it can effectively shorten the cable splicing work It saves time and facilitates maintenance and repair. At the same time, the cable can retain its original characteristics such as fire resistance.

In the fire-resistant quick connector of the present invention, the snap-in connector can pass the verification of the IEC 60998 standard. Specifically, as shown in Table 1 and Table 2 below, the engaging parts that have been heat treated at temperatures above 230 ^° C for 20 minutes can pass the lifting weight test of 7.8 kg and 8.8 kg, and withstand a certain tensile force, which means that the engaging parts have The stable metal rigidity and mechanical strength can give the cable enough bite force to bite the cable more firmly. Table 1 Results of lifting weight test and tensile force test Lifting weight test Not heat treated Heat treatment 210℃/20min Heat treatment 230℃/20min Heat treatment 250℃/20min Heat treatment 270℃/20min Hoist 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 7.8kg pass through pass through Fail pass through pass through pass through pass through pass through pass through pass through pass through pass through pass through pass through pass through 8.8kg Fail Fail pass through Fail pass through pass through pass through pass through pass through pass through pass through pass through pass through pass through Pull test Not heat treated Heat treatment 210℃/20min Heat treatment 230℃/20min Heat treatment 250℃/20min Heat treatment 270℃/20min Tensile test value 7.5~8.2 kg 8.5~9.5 kg 8.8~10.0 kg 9.2~10.5 kg 8.9~10.6 kg Table 2 Relationship between tensile force and cross-sectional area in accordance with IEC 60998 standard Cross-sectional area (mm ² ) 0.2 0.34 0.5 0.75 1.0 1.5 Pulling force(N) 10 15 20 30 35 40 Cross-sectional area (mm ² ) 2.5 4 6 10 16 Pulling force(N) 50 60 80 90 100

The contents disclosed above are only preferred and feasible embodiments of the present invention, and do not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made by using the description and drawings of the present invention are included in the application of the present invention. within the scope of the patent.

Z: Cable assembly 1: Fire-resistant quick connector 11: Fire-resistant structure 111: Open end 112:Containment space 113: Positioning flange 12: Snap connector 121: Electrical conductor 1211:Conductor insertion port 1212: Hollow structure 122: Bite parts 1221:Installation Department H:Through hole 1222:Outer interference part 1223:Inner interference part 1224, 1225: Elastic bending part 123: Fixtures 1231:Head 1232:Joint 124: Pressing parts 13: Insulation jacket 14:Adhesive layer 15: Shell components 151:Protective shell 1511:Interface end 152: First cable fixing joint 153:Second cable fixing joint 2:First cable 21:First conductor 22: First refractory layer 23: First insulation layer 24: First coating layer 3: Second cable 31:Second conductor 32: Second refractory layer 33: Second insulation layer 34: Second coating layer D1, D2: Maximum vertical distance

Figure 1 is a schematic structural diagram of the fire-resistant quick joint of the present invention.

Figure 2 is a partial enlarged view of part II in Figure 1.

Figure 3 is a schematic three-dimensional assembly diagram of the cable assembly of the present invention.

Figure 4 is a plan exploded schematic view of the cable assembly of the present invention.

Figure 5 is a partial top view of the cable assembly of the present invention.

Figure 6 is a partial cross-sectional schematic view of the cable assembly of the present invention.

7 and 8 are schematic diagrams of the connection process of the cable assembly of the present invention.

Figure 9 is a schematic structural diagram of the first cable or the second cable of the cable assembly of the present invention.

Figure 10 is another structural schematic diagram of the fire-resistant quick connector of the present invention.

1: Fire-resistant quick connector

11: Fire-resistant structure

111: Open end

112:Containment space

12: Snap connector

121: Electrical conductor

1211:Conductor insertion port

122: Bite parts

123: Fixtures

13: Insulation jacket

14:Adhesive layer

Claims (9)

A fire-resistant quick connector, including: a fire-resistant structure with two opposite open ends and a receiving space connected between the two open ends; and a snap-in connector disposed in the receiving space; wherein, The snap-in connector includes an electrical conductor and two snap-in parts, the two snap-in parts are integrally connected to the conductor and are respectively located near the two open ends; wherein, each of the snap-in parts includes a A mounting part, an outer interference part and an inner interference part, the outer interference part and the inner interference part are fixed on the conductor through the mounting part, the outer interference part and the inner interference part are separated from each other and are arranged oppositely, and the outer interference part is closer to the corresponding opening end than the inner interference part; wherein the maximum vertical distance between the outer interference part and the mounting part is greater than the inner interference part and the installation part. The maximum vertical distance between the mounting parts; wherein, the conductor is a conductive metal tube, and the conductive metal tube has two opposite conductor insertion openings and two hollow structures, and the two conductor insertion openings are respectively Aligned with the two open ends of the refractory structure, and the positions of the two hollow structures respectively correspond to the mounting parts of the two bite pieces. The fire-resistant quick connector according to claim 1, wherein the outer interference part and the inner interference part are each connected to the installation part through an elastic bending part, and the outer interference part and the inner interference part One of them extends in a direction close to the other of the outer interference part and the inner interference part and away from the mounting part. The fire-resistant quick joint according to claim 2, wherein the end of the inner interference portion is formed into an underhook structure. The fire-resistant quick connector according to claim 1, wherein the bite connector further includes two fixing parts, and the two fixing parts respectively pass through the mounting parts of the two bite parts and are locked respectively. Two hollow structures on the conductor. The refractory quick joint according to claim 1, wherein the refractory structure includes a refractory component, and the refractory component of the refractory structure is selected from the group consisting of magnesium oxide, aluminum oxide, zirconium oxide, magnesium hydroxide, and hydrogen. A group consisting of alumina, mineral talc and nanoclay. The fire-resistant quick connector according to claim 1, wherein the fire-resistant quick connector further includes an insulating jacket surrounding the snap-in connector. The fire-resistant quick connector according to claim 6, wherein the fire-resistant quick connector further includes an adhesive layer disposed between the insulating jacket and the fire-resistant structure, the adhesive layer including an adhesive component and a fire-resistant component, and the fire-resistant component of the adhesive layer is selected from the group consisting of a flame retardant, nanoclay and α-zirconium phosphate. The fire-resistant quick connector according to claim 1, wherein the fire-resistant quick connector further includes a protective shell, a first cable fixing joint and a second cable fixing joint, and the protective shell is used to accommodate the The refractory structure and the snap-in connector, the protective shell has two opposite interface ends respectively aligned with the two open ends of the refractory structure, and the first cable fixing joint and the The second cable fixing joints are respectively joined to the two interface ends. A cable assembly, including a first cable, a second cable and a fire-resistant quick connector as described in claim 1, a conductor of the first cable and a conductor of the second cable respectively coming from the fire-resistant The two open ends of the structure enter the receiving space of the fire-resistant structure and are fixedly connected to the snap-in connector; wherein the conductor of the first cable and the conductor of the second cable are each Structural interference occurs with the outer interference portion and the inner interference portion of the corresponding bite piece; wherein the conductor of the first cable and the conductor of the second cable mutually interact through the conductor. Electrical connection.

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