Fireproof cable with joint

Abstract

The invention discloses a fireproof cable with a connector, and relates to the technical field of cables, the fireproof cable comprises cables, connector assemblies and a connecting piece, the two ends of each cable are fixedly provided with the connector assemblies, the two different cables are connected through the connector assemblies, the two connector assemblies are aligned, then the connecting piece is rotated to lock the two connector assemblies, and the two connector assemblies are connected through the connecting piece. The cable comprises a flame retardant pipe, the bottom of the flame retardant pipe is melted through temperature rise of a cable core, a flame retardant is extruded out through extrusion for fire extinguishing, a ventilation opening is formed in the connector assembly for ventilation, the cable core in the connector assembly can pierce the adjacent flame retardant pipe to extinguish fire through spontaneous combustion, and when the temperature of the cable core rises or spontaneous combustion occurs, the cable core can pierce the adjacent flame retardant pipe to extinguish fire. The flame retardant pipe can be melted to extinguish fire, the flame retardant can provide gaps for heat dissipation of the cable core in the flame retardant pipe, and meanwhile the situation that the flame retardant in the flame retardant pipe is sprayed out due to the fact that the cable is accidentally pressed can be prevented by taking out the flame retardant in a melting mode.

Description

Technical Field

[0001] The invention relates to the technical field of cables, and in particular to a fireproof cable with a connector. Background Art

[0002] Fireproof cable is a general term for wires and cables with fireproof performance, which are usually divided into flame-retardant cables and fire-resistant cables. The characteristics of flame-retardant cables are that they can delay the spread of flames along the cables, prevent the fire from expanding, and have self-extinguishing properties after ignition. This type of cable can control the spread of flames within a certain range under the conditions of single cable or bundle laying, thereby avoiding major disasters caused by cable fire and spreading, and improving the fire prevention level of cable lines. Due to its relatively low cost, flame-retardant cables are a variety of cables widely used in fireproof cables. Cable joints, also known as cable heads, are the points where each section of the cable must be connected as a whole in order to make it a continuous line after the cable is laid. These connection points are called cable joints. The cable joints in the middle of the cable line are called intermediate joints, while the cable joints at both ends of the line are called terminal heads. The main function of the cable joint is to lock and fix the incoming and outgoing lines, ensure the smoothness of the line, keep the cable sealed, and ensure the insulation level at the cable joint, so that it can operate safely and reliably.

[0003] A composite fireproof cable is disclosed in a Chinese invention patent with publication number: CN115565724A, in which the cable body is distributed in a ring around the cable core. A group of flame-retardant plates that are evenly distributed in a ring and distributed along the axial direction of the cable core are set on the side wall of the cable core. A protective sleeve is wrapped around the outer ring of the flame-retardant plate, and an isolation cavity is formed between this protective sleeve, the cable core and the two adjacent flame-retardant plates. There is exactly one cable body distributed in each isolation cavity, and the number of cable bodies is the same as the number of isolation cavities. Due to this design, each cable body is installed separately in the corresponding isolation cavity. Therefore, when one of the cable bodies spontaneously ignites or burns under the influence of the outside world, the flame-retardant plate between them can effectively block the fire source and prevent the fire from spreading or contacting the surface of other cable bodies. In this way, the overall fire resistance of the cable is significantly improved, and the risk of large-scale burning of the cable due to the stacking and bonding of the cable bodies is reduced. The flame retardant plate is provided in the prior art but cannot extinguish fire, and the traditional cable with flame retardant cannot meet the heat dissipation and flame retardancy requirements at the same time, and the puncture-type flame retardant structure is easily squeezed by external force and accidentally damaged. Summary of the invention

[0004] In view of the above technical problems, the present invention discloses a fireproof cable with a connector, including a cable, two ends of the cable are equipped with connector assemblies, and the two connector assemblies are connected by a connector. The cable includes a cable core, the outer side of the cable core is provided with a protective layer, and a flame retardant assembly is provided between the protective layer and the cable core. The flame retardant assembly includes a flame retardant tube, and the lower end of the flame retardant tube is adjacent to the cable core. When the temperature of the cable core is too high, the lower part of the flame retardant tube will melt, and the flame retardant in the flame retardant tube will spray out. Through the above technical scheme, when the temperature of the cable core rises or spontaneously ignites, the flame retardant tube can be melted to extinguish the fire. The flame retardant in the flame retardant tube can provide a gap for the cable core to dissipate heat. At the same time, taking out the flame retardant by melting can also prevent the cable from being accidentally compressed, causing the flame retardant in the flame retardant tube to spray out.

[0005] Furthermore, a connecting frame is installed between the protective layer and the cable core, and a plurality of card interfaces are provided on the connecting frame, and the flame retardant tube is installed in the card interface. Through the above technical solution, the plurality of flame retardant tubes can provide all-round protection to different positions of the cable core, and the card interface is used for support, so as to further maintain the working position of the flame retardant tube and prevent uneven spraying of the flame retardant.

[0006] Furthermore, the connecting frame is provided with a plurality of sliding openings, and the first sliding plate and the second sliding plate are respectively slidably installed in the adjacent sliding openings, the lower ends of the first sliding plate and the second sliding plate are in contact with the cable core, and the lower end of the flame retardant tube is in contact with the side surfaces of the first sliding plate and the second sliding plate. Through the above technical solution, when the cable is squeezed by external force, it can be supported by the first sliding plate and the second sliding plate, further preventing the flame retardant tube from being accidentally damaged, and a gap is left between the flame retardant tube and the cable core through the support of the first sliding plate and the second sliding plate, which can ensure the heat dissipation of the cable core.

[0007] Furthermore, the middle of the flame retardant tube is thinner than the two ends, and the middle of the flame retardant tube slides radially on the connecting frame. Through the above technical solution, when the cable is squeezed, the flame retardant tube can also slide up and down for a short distance to adapt, so as to prevent being squeezed directly.

[0008] Furthermore, the upper end of the first sliding plate abuts against the first semicircular plate, one end of the first semicircular plate abuts against the upper end of the flame retardant tube, the upper end of the second sliding plate abuts against the second semicircular plate, one end of the second semicircular plate abuts against the upper end of the flame retardant tube, and the arc top positions of the first semicircular plate and the second semicircular plate abut against the inner side of the protective layer. Through the above technical solution, after the cable core is heated and expanded, the first sliding plate moves away from the axis position, and the first semicircular plate is pushed against the first semicircular plate so that the first semicircular plate squeezes the flame retardant tube toward the axis, and the flame retardant of the flame retardant tube can be squeezed out as quickly as possible.

[0009] Furthermore, the lower end of the flame retardant tube is provided with a slot. Through the above technical solution, the slot can make the flame retardant tube easier to break when squeezed by the first semicircular plate and the second semicircular plate, and the slot design can be flame-retardant most quickly after extrusion by melting under heat.

[0010] Furthermore, the joint assembly includes a joint pipe, a connecting sleeve is fixedly mounted on the first end of the joint pipe, the connecting sleeve is fixed to the cable, a thread is arranged on the second end of the joint pipe, the threads of the two joint assemblies are close to each other and are fixed by a connector, a sealing circular plate is slidably mounted in the joint pipe, a closed space is formed in the two connected joint assemblies by the sealing circular plate, a connecting plate is fixedly mounted on the sealing circular plate, a vent is arranged on the joint pipe, and the connecting plate blocks the vent. Through the above technical solution, if the cable core temperature is too high at the position of the joint assembly, the sealing circular plate will be squeezed to slide, and the vent can be opened at this time to vent and dissipate heat.

[0011] Furthermore, the sealing circular plate is provided with a through hole, the diameter of the part of the through hole close to the cable is larger than the diameter of the part away from the cable, the part of the through hole close to the cable is fixedly provided with a flow tube, the top of the flow tube is a sharp mouth, the part of the through hole away from the cable is provided with a one-way valve, and the sealing circular plate slides in the joint tube through the flow tube to pierce the flame retardant tube. Through the above technical solution, when the cable core in the joint assembly spontaneously ignites, the enclosed space will expand rapidly, and the sharp mouth of the flow tube will pierce the side of the flame retardant tube, and then the flame retardant will be sprayed into the joint assembly through the one-way valve, and the sprayed flame retardant will have a certain pressure through the change in the diameter of the through hole.

[0012] Furthermore, a push block is fixedly mounted on the circulation tube. According to the above technical solution, after the circulation tube pierces the flame retardant tube, the push block can squeeze the flame retardant tube, so that the flame retardant is sprayed out faster.

[0013] Furthermore, the inner diameter of the sealing circular plate is larger than the diameter of the cable core, and a sealing strip is detachably mounted on the inner side of the sealing circular plate, which is in close contact with the cable core. Through the above technical solution, the inner side of the sealing circular plate can adapt to the normal diameter change of the cable core, and the sealing strip can also maintain a closed space, so that the sealing circular plate will not be stuck when the cable core expands.

[0014] The beneficial effects of the present invention compared with the prior art are: (1) Through the technical solution of the present invention, when the temperature of the cable core rises or spontaneously ignites, the flame retardant tube can be melted to extinguish the fire. The flame retardant in the flame retardant tube can provide gaps for the cable core to dissipate heat. At the same time, removing the flame retardant by melting can also prevent the cable from being accidentally compressed, causing the flame retardant in the flame retardant tube to spray out.

[0015] (2) Through the technical solution of the present invention, multiple flame retardant tubes can provide all-round protection for different positions of the cable core, and through the support of the card interface, the working position of the flame retardant tube can be further maintained to prevent uneven spraying of the flame retardant.

[0016] (3) Through the technical solution of the present invention, when the cable is squeezed by external force, it can be supported by the first sliding plate and the second sliding plate, further preventing the flame retardant tube from being accidentally damaged. In addition, a gap is left between the flame retardant tube and the cable core through the support of the first sliding plate and the second sliding plate, which can ensure the heat dissipation of the cable core.

[0017] (4) Through the technical solution of the present invention, when the cable is squeezed, the flame retardant tube can also slide up and down a short distance to adapt to it, thereby preventing it from being directly squeezed and broken.

[0018] (5) According to the technical solution of the present invention, after the cable core expands due to heat, the first sliding plate moves away from the axial position, and the first semicircular plate is pushed up so that the first semicircular plate squeezes the flame retardant tube toward the axial center. At this time, the flame retardant in the flame retardant tube can be squeezed out as quickly as possible.

[0019] (6) Through the technical solution of the present invention, the grooves can make it easier for the flame retardant tube to break when it is squeezed by the first semicircular plate and the second semicircular plate. By melting due to heat, the grooved design can be flame-retarded most quickly after extrusion.

[0020] (7) According to the technical solution of the present invention, if the temperature of the cable core is too high at the position of the joint assembly, the sealing circular plate will be squeezed to slide, and the vent can be opened to ventilate and dissipate heat.

[0021] (8) Through the technical solution of the present invention, when the cable core in the joint assembly spontaneously ignites, the enclosed space will expand rapidly and pierce the side of the flame retardant tube through the sharp mouth of the circulation tube, and then the flame retardant will be sprayed into the joint assembly through the one-way valve, and the diameter change of the through hole will make the sprayed flame retardant have a certain pressure.

[0022] (9) According to the technical solution of the present invention, after the flow tube pierces the flame retardant tube, the flame retardant tube can be squeezed by the push block, so that the flame retardant is sprayed out faster.

[0023] (10) Through the technical solution of the present invention, the inner side of the sealing circular plate can adapt to the normal diameter change of the cable core, and the sealing strip can also maintain a closed space, so that the sealing circular plate will not be stuck when the cable core expands. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0025] Figure 2Schematic diagram of the cable structure of an embodiment of the present invention.

[0026] Figure 3 Schematic diagram of the interior of the cable structure according to an embodiment of the present invention.

[0027] Figure 4 It is a front view of a cable according to an embodiment of the present invention.

[0028] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0029] Figure 6 Schematic diagram of the connection between the cable and the connector assembly according to an embodiment of the present invention.

[0030] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0031] Figure 8 Schematic diagram of a connector assembly according to an embodiment of the present invention.

[0032] Fig. 9 Schematic diagram of the internal structure of a joint assembly according to an embodiment of the present invention.

[0033] Figure numbers: 1-cable; 2-connector assembly; 3-connector; 101-protective layer; 102-connecting frame; 103-card interface; 104-sliding port; 105-first sliding plate; 106-first semicircular plate; 107-flame retardant tube; 108-second semicircular plate; 109-second sliding plate; 110-cable core; 111-groove; 201-connecting sleeve; 202-connector tube; 203-thread; 204-spring; 205-push plate; 206-sliding box; 207-sliding bar; 208-push block; 209-circulation tube; 210-sealing circular plate; 211-check valve; 212-sealing strip; 213-connecting plate; 214-sliding groove. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0035] like Figure 1-Figure 9A fire-proof cable with a connector is shown, comprising a cable 1, a connector assembly 2, and a connector 3. Connector assemblies 2 are fixedly installed at both ends of all cables 1. Two different cables 1 are connected via the connector assembly 2. The two connector assemblies 2 are aligned and then the connector 3 is rotated to lock the two connector assemblies 2. The cable 1 comprises a flame retardant tube 107. The bottom of the flame retardant tube 107 is melted by heating the cable core 110, and the flame retardant is squeezed out by extrusion to extinguish the fire. Ventilation holes are provided in the connector assembly 2 for ventilation. The cable core 110 in the connector assembly 2 can spontaneously combust and pierce the adjacent flame retardant tube 107 to extinguish the fire.

[0036] In this embodiment, the cable 1 includes a protective layer 101, a cable core 110 is arranged in the protective layer 101, and a flame retardant component is arranged between the cable core 110 and the protective layer 101. The cable core 110 is extinguished and flame-retarded by the flame retardant component. The flame retardant component can prevent accidental extrusion and breakage, and extinguish the fire evenly. The flame retardant is placed in the flame retardant tube 107 to leave a certain gap for heat dissipation. The flame retardant component specifically includes a connecting frame 102, and the connecting frame 102 is located between the protective layer 101 and the cable core 110. A plurality of card interfaces 103 and a plurality of sliding ports 104 are arranged on the connecting frame 102. The card interfaces 103 and the sliding ports 104 are alternately arranged. A flame retardant tube 107 is installed in each cable 1 connector 3, and the flame retardant tube 107 The middle position is thinner and can slide radially in the card interface 103. The two ends of the flame retardant tube 107 are larger than the width of the card interface 103, so it can be stuck. The first sliding plate 105 and the second sliding plate 109 are slidably installed in the sliding port 104, and are respectively located on both sides of the flame retardant tube 107. The first sliding plate 105 and the second sliding plate 109 have exactly the same structure and function. For the convenience of distinction, different names are used here. The first sliding plate 105 and the second sliding plate 109 slide radially, and the lower end of the flame retardant tube 107 (in this embodiment, the lower end refers to the end close to the axis) contacts the side of the first sliding plate 105 and the second sliding plate 109, and is limited by the first sliding plate 105 and the second sliding plate 109 and can only slide upward.

[0037] The first sliding plate 105 is abutted with a first semicircular plate 106, one end of which is abutted with the flame retardant tube 107, and the second sliding plate 109 is abutted with a second semicircular plate 108, one end of which is abutted with the upper end of the flame retardant tube 107. The first sliding plate 105 and the second sliding plate 109 are also abutted with other first semicircular plates 106 and second semicircular plates 108, respectively. The arc top positions of the first semicircular plates 106 and the second semicircular plates 108 are aligned with the protective The inner side of the layer 101 is in contact with the first sliding plate 105. When the first sliding plate 105 moves away from the axis, the arc top of the first semicircular plate 106 makes the end of the first semicircular plate 106 that contacts the flame retardant tube 107 move toward the axis to squeeze the flame retardant tube 107. A groove 111 is provided at the end of the flame retardant tube 107 close to the axis. When the upper end of the flame retardant tube 107 is squeezed by the first semicircular plate 106 and the second semicircular plate 108, the flame retardant tube 107 bursts from the position of the groove 111 to spray the flame retardant.

[0038] The lower ends of the first sliding plate 105 and the second sliding plate 109 are in contact with the outer side of the cable core 110, and a certain gap is left between the flame retardant tube 107 and the cable core 110 for heat dissipation. When the temperature of the cable core 110 is too high or even spontaneously ignites, the lower end of the flame retardant tube 107 will melt, and the flame retardant in the flame retardant tube 107 will tilt out for flame retardancy. The first sliding plate 105 and the second sliding plate 109 can serve as supports for the flame retardant tube 107. When the entire cable 1 is squeezed by external force, it can be supported by the first sliding plate 105 and the second sliding plate 109. The protective layer 101 squeezes the first semicircular plate 106, and the first semicircular plate 106 squeezes the cable core 110 downward. The first semicircular plate 106 squeezes the flame retardant tube 107, and the flame retardant tube 107 moves toward the axis until the flame retardant tube 107 contacts the first semicircular plate 106 and the second sliding plate 109 to prevent the flame retardant tube 107 from being squeezed, and the flame retardant tube 107 slides for adjustment.

[0039] In this embodiment, the joint assembly 2 includes a joint pipe 202, the diameter of the joint pipe 202 is the same as the diameter of the protective layer 101, the cable cores 110 in different cables 1 are connected in the joint pipe 202, the first end of the joint pipe 202 is fixedly provided with a connecting sleeve 201, the diameter of the connecting sleeve 201 is larger than the joint pipe 202, the connecting sleeve 201 is sleeved on the protective layer 101, and is pressed to be fixedly connected, the second end of the joint pipe 202 is provided with a thread 203, and adjacent joint pipes 202 are fixed by a connecting piece 3, and the connection An internal thread is arranged in the connector 3 and is fixed by rotation. Four ventilation holes are arranged on the joint pipe 202. A connecting plate 213 is slidingly installed on the inner side of the ventilation hole. The connecting plate 213 blocks the ventilation hole. When the connecting plate 213 slides away from the ventilation hole, the ventilation in the joint pipe 202 can be cooled. A sliding box 206 is fixedly installed on the outer side of the ventilation hole. A spring 204 is fixedly installed in the sliding box 206. A pushing plate 205 is fixedly installed on the connecting plate 213. The pushing plate 205 is fixedly connected to the spring 204. In the natural state, the connecting plate 213 blocks the ventilation hole.

[0040] The four connecting plates 213 are commonly fixed with a sealing circular plate 210, a sliding groove 214 is provided on the sealing circular plate 210, a sliding bar 207 is provided in the joint pipe 202, the sliding groove 214 is slidably connected with the sliding bar 207, so that the sealing circular plate 210 slides in the joint pipe 202, a plurality of through holes are provided on the sealing circular plate 210, the first end opening of each through hole is larger than the second end opening, the first end of the through hole is the end close to the cable 1, a flow tube 209 is fixedly provided on the first end of the through hole, the flow tube 209 is provided with a sharp mouth, a check valve 211 is fixedly provided on the second end of the through hole, a push block 208 is fixedly provided on the flow tube 209, and a plurality of flow tubes 209 and The position of the flame retardant tube 107 corresponds one to one, the inner diameter of the sealing circular plate 210 is larger than the diameter of the cable core 110, and a sealing strip 212 is detachably installed on the sealing circular plate 210. The sealing strip 212 is in close contact with the cable core 110, so that a closed space is formed in the joint tube 202. When the cable core 110 in the joint tube 202 spontaneously ignites, the sealing circular plate 210 can be pushed to move toward the cable 1, and then the flow tube 209 pierces the flame retardant tube 107, and the flame retardant in the flame retardant tube 107 is sprayed into the joint tube 202. The sealing circular plate 210 continues to move, and the pushing block 208 will squeeze the flame retardant tube 107, allowing the flame retardant to spray out from the one-way valve 211 faster to extinguish the fire.

[0041] The working principle of a fireproof cable with a joint in an embodiment of the present invention is as follows: the joint assembly 2 is fixed on the protective layer 101 of the cable 1 through the connecting sleeve 201. If two cables 1 need to be connected, the joint tube 202 is aligned, and the connecting piece 3 is installed and rotated to fix. When the cable core 110 in the cable 1 spontaneously ignites, the cable core 110 pushes the first sliding plate 105 and the second sliding plate 109 outward along the axial direction, and the first sliding plate 105 and the second sliding plate 109 push the first semicircle The plate 106 and the second semicircular plate 108 are restricted by the inner side of the protective layer 101. The second semicircular plate 108 and the first semicircular plate 106 squeeze the flame retardant tube 107 in the direction close to the axis (the first semicircular plate 106 and the second semicircular plate 108 are equivalent to levers). At this time, the cable core 110 heats up to soften or even melt the bottom of the flame retardant tube 107. At the same time, the flame retardant tube 107 is squeezed and explodes from the groove 111. The flame retardant in the flame retardant tube 107 is sprayed onto the cable core 110 to extinguish the fire and reduce the temperature.

[0042] If the cable core 110 in the joint tube 202 heats up, it expands in the confined space and pushes the sealing circular plate 210. The sealing circular plate 210 drives the connecting plate 213. The connecting plate 213 slides away from the ventilation hole and cools down through the ventilation hole. If violent expansion or spontaneous combustion occurs, the sealing circular plate 210 drives the circulation tube 209 to gradually approach the cable 1, and finally pierces the flame retardant tube 107 through the circulation tube 209. The flame retardant in the flame retardant tube 107 is sprayed into the joint tube 202 through the circulation tube 209 and the one-way valve 211 to extinguish the fire. The sealing circular plate 210 continues to approach the cable 1, and squeezes the flame retardant tube 107 through the push block 208. The flame retardant in the flame retardant tube 107 is squeezed and the flame retardant is sprayed out more quickly to extinguish the fire. After the fire is extinguished, the sealing circular plate 210 returns to its original position. After the fire is extinguished, the damaged part is manually replaced. The joint assembly 2 can be used repeatedly without replacement.

[0043] The present invention is further described above with the aid of specific embodiments. However, it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in the field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A fireproof cable with a connector, comprising a cable (1), with connector assemblies (2) installed at both ends of the cable (1), and the two connector assemblies (2) are connected by a connector (3), characterized in that: The cable (1) comprises a cable core (110), the outer side of the cable core (110) is provided with a protective layer (101), a flame retardant component is provided between the protective layer (101) and the cable core (110), the flame retardant component comprises a flame retardant tube (107), the lower end of the flame retardant tube (107) is adjacent to the cable core (110), when the temperature of the cable core (110) is too high, the lower part of the flame retardant tube (107) will melt, and the flame retardant in the flame retardant tube (107) will be sprayed out.

2. A fireproof cable with a connector according to claim 1, characterized in that: A connecting frame (102) is installed between the protective layer (101) and the cable core (110), a plurality of card interfaces (103) are provided on the connecting frame (102), and the flame retardant tube (107) is installed in the card interface (103).

3. A fireproof cable with a connector according to claim 2, characterized in that: The connecting frame (102) is provided with a plurality of sliding openings (104), and a first sliding plate (105) and a second sliding plate (109) are respectively slidably mounted in adjacent sliding openings (104), the lower ends of the first sliding plate (105) and the second sliding plate (109) are in contact with the cable core (110), and the lower end of the flame retardant tube (107) is in contact with the side surfaces of the first sliding plate (105) and the second sliding plate (109).

4. A fireproof cable with a connector according to claim 3, characterized in that: The middle position of the flame retardant tube (107) is thinner than the two ends, and the middle position of the flame retardant tube (107) slides radially on the connecting frame (102).

5. A fireproof cable with a connector according to claim 4, characterized in that: The upper end of the first sliding plate (105) abuts against the first semicircular plate (106), one end of the first semicircular plate (106) abuts against the upper end of the flame retardant tube (107), the upper end of the second sliding plate (109) abuts against the second semicircular plate (108), one end of the second semicircular plate (108) abuts against the upper end of the flame retardant tube (107), and the arc top positions of the first semicircular plate (106) and the second semicircular plate (108) abut against the inner side of the protective layer (101).

6. A fireproof cable with a connector according to claim 5, characterized in that: The lower end of the flame retardant tube (107) is provided with a groove (111).

7. A fireproof cable with a connector according to claim 1, characterized in that: The joint assembly (2) comprises a joint pipe (202), a first end of the joint pipe (202) being fixedly provided with a connecting sleeve (201), the connecting sleeve (201) being fixed to the cable (1), a second end of the joint pipe (202) being provided with a thread (203), the threads (203) of the two joint assemblies (2) being close to each other and being fixed by a connecting member (3), a sealing circular plate (210) being slidably provided in the joint pipe (202), a closed space being formed in the two connected joint assemblies (2) by the sealing circular plate (210), a connecting plate (213) being fixedly provided on the sealing circular plate (210), a vent being provided on the joint pipe (202), and the connecting plate (213) blocking the vent.

8. A fireproof cable with a connector according to claim 7, characterized in that: The sealing circular plate (210) is provided with a through hole, the diameter of a portion of the through hole close to the cable (1) is larger than the diameter of a portion away from the cable (1), a flow tube (209) is fixedly mounted on the portion of the through hole close to the cable (1), the top end of the flow tube (209) is a pointed mouth, and a one-way valve (211) is provided on the portion of the through hole away from the cable (1), and the sealing circular plate (210) slides in the joint tube (202) through the flow tube (209) to pierce the flame retardant tube (107).

9. A fireproof cable with a connector according to claim 8, characterized in that: A pushing block (208) is fixedly mounted on the circulation tube (209).

10. A fireproof cable with a connector according to claim 9, characterized in that: The inner diameter of the sealing circular plate (210) is greater than the diameter of the cable core (110), and a sealing strip (212) is detachably mounted on the inner side of the sealing circular plate (210), wherein the sealing strip (212) is in close contact with the cable core (110).

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