Fireproof connecting assembly for fireproof cable

Abstract

The utility model relates to the technical field of cable connection, in particular to a fireproof connection assembly for a fireproof cable, which comprises a fireproof cylinder of a cavity structure with two open ends. Annular pedestals are placed in ports of the two sides of the fireproof cylinder, holes in the centers of the annular pedestals are communicated with the fireproof cylinder, end covers are arranged at the ends of the fireproof cylinder, the annular pedestals are located in the end covers and covered by the end covers, and meanwhile penetrating holes allowing cables to penetrate through are formed in the end faces of the end covers. An inner concave cavity is formed in the end face of the side, away from the fireproof cylinder, of the annular pedestal and is a space used for containing fireproof plaster, a boss surrounding the penetrating hole is arranged in the end cover, and the boss is inserted into the inner concave cavity of the annular pedestal when the end cover is arranged in a covering mode to extrude the fireproof plaster to surround the cable and block the penetrating hole. And a certain degree of sealing can be realized while the joint is protected by the fireproof cover.

Description

Technical Field

[0001] The utility model relates to the technical field of cable connection, in particular to a fireproof connection assembly for a fireproof cable. Background Art

[0002] Fire-resistant cables are cables that can continue to operate for a certain period of time even if they are directly burned by flames under specified conditions.

[0003] Fireproof cables are usually coated with flame-retardant fireproof materials on the outside of the wire harness to achieve fireproof performance. When the fireproof cables are connected, the sheath at the joint is destroyed, so the fireproof performance will be reduced.

[0004] Therefore, this solution provides a fireproof connection assembly suitable for fireproof cables, which is used to improve the fireproof effect at the fireproof cable joints. Utility Model Content

[0005] The utility model aims to at least solve the problem of poor fireproof performance at cable connections in the prior art.

[0006] The present invention provides a fireproof connection assembly for fireproof cables, which is achieved by the following specific technical means: it includes a fireproof cylinder, which is a cavity structure with open ends. Annular pads are placed in the ports on both sides of the fireproof cylinder. The hole in the center of the annular pad is connected to the fireproof cylinder, and the end cover of the fireproof cylinder is provided with an end cover. The annular pad is located in the end cover and is covered by the end cover. At the same time, the end face of the end cover is also provided with a through hole for the cable to pass through. The end face of the annular pad on the side away from the fireproof cylinder is provided with an inner concave cavity for placing fireproof putty, and a boss surrounding the through hole is provided in the end cover. When the end cover is provided, the boss is inserted into the inner concave cavity of the annular pad to squeeze the fireproof putty around the cable and seal the through hole.

[0007] Preferred technical solution 1: A movable cylinder is slidably installed in the hole of the annular seat, and a spring is connected between the end of the movable cylinder located in the ignition cylinder and the annular seat.

[0008] Preferred technical solution 2: A convex needle is fixed on one end surface of the boss inserted into the inner concave cavity, and the convex needle contacts the outer end surface of the movable cylinder when the end cover is closed.

[0009] Preferred technical solution three: the inner wall of the end cover is threadedly connected to the outer wall of the fireproof tube port.

[0010] Preferred technical solution four: an external threaded sleeve is fixed on the side of the annular pad close to the fireproof cylinder, and the outer wall of the external threaded sleeve is connected to the inner wall of the fireproof cylinder port through threads.

[0011] Preferred technical solution five: Connecting terminals are placed in the fireproof tube to fix and connect the ends of the two groups of cables.

[0012] The above structure enables this solution to have the following beneficial effects:

[0013] 1. Using the fireproof putty, together with the end cover and the annular pad, the joint can be protected by the fireproof cover while achieving a certain degree of sealing;

[0014] 2. The sealing and molding process of the fireproof putty is completed independently, and no manual repeated application is required;

[0015] 3. Enhance the fireproof performance of fireproof cable joints to avoid the fireproof cable from affecting the overall performance due to defects in the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 Assembled state for this solution Figure 1 ;

[0018] Figure 2 Assembled state for this solution Figure 2 ;

[0019] Figure 3 Assembled state for this solution Figure 2 sectional view of

[0020] Figure 4 This is the exploded view of the fire tube, annular pad and end cover of this scheme;

[0021] Figure 5 This is an exploded view of the annular pad, spring and movable cylinder of this scheme.

[0022] Among them, 1. fireproof cylinder, 2. annular pad, 21. inner concave cavity, 22. external threaded sleeve, 3. movable cylinder, 4. spring, 5. end cover, 51. perforation, 52. boss, 53. convex needle, 6. connecting terminal, 61. conductive splint. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-Figure 3, a fireproof connection assembly for fireproof cables, including a fireproof tube 1, the fireproof tube 1 is a cavity structure with open ends, an annular pad 2 is placed in the ports on both sides of the fireproof tube 1, the hole in the center of the annular pad 2 is connected to the fireproof tube 1, and the end cover of the fireproof tube 1 is provided with an end cover 5. When the end cover 5 is closed, the annular pad 2 is located in the end cover 5 and is covered by the end cover 5. At the same time, the end face of the end cover 5 is also provided with a through hole 51 for the cable to pass through, and the through hole 51 is opposite to the hole in the center of the annular pad 2. An inner concave cavity 21 is provided on the end surface away from the fireproof cylinder 1, which is a space for placing fireproof putty. A boss 52 surrounding the through-hole 51 is provided in the end cover 5. When the end cover 5 is installed, the boss 52 is inserted into the inner concave cavity 21 of the annular seat 2 to squeeze the fireproof putty around the cable and seal the through-hole 51. There is no need to squeeze fireproof putty into the through-hole 51 from the outside, nor is there any need to coat the cable with putty in advance. The above operation can be automatically completed when the end cover 5 is assembled and installed.

[0025] A connection terminal 6 (using existing technology) is placed in the fireproof tube 1. Two sets of conductive clamps 61 are provided on the connection terminal 6. The conductive clamps 61 are fixed to the connection terminal 6 by bolts. The two sets of conductive clamps 61 are connected by conductive metal. When in use, the end harness of the cable is placed on the connection terminal 6 and pressed by the conductive clamps 61. By tightening the bolts, the conductive clamps 61 press the harness tightly against the connection terminal 6. The two sets of conductive clamps 61 are used to fix and conduct the ends of the two sets of cables.

[0026] Before use, separate the end cover 5, the annular pad 2 and the fire tube 1, and take out the connecting terminal 6. Pass one group of cables through the through-holes 51 on the end cover 5 on the corresponding side and the holes on the annular pad 2, and pass the other group of cables through the through-holes 51 on the end cover 5 on the corresponding other side and the holes on the annular pad 2. Then, pass the two groups of cables through the fire tube 1 and fix the ends of the two groups of cables on the connecting terminal 6. After placing the connecting terminal 6 into the fire tube 1, install the two groups of annular pads 2 on the two side ports of the fire tube 1 respectively, and then put fireproof putty in the inner concave cavity 21 of each group of annular pads 2 respectively, and then cover the end cover 5 to the port of the fire tube 1, cover the annular pad 2, and squeeze the fireproof putty in the inner concave cavity 21 to surround the cable and seal the through-hole 51.

[0027] See also Figure 3-Figure 5, a fireproof connection component for fireproof cables, a movable cylinder 3 is installed slidingly through the hole of the annular cushion 2, the inner diameter of the through-hole 51 and the movable cylinder 3 is larger than the diameter of the cable, which is convenient for the smooth passage of the cable, and the end of the movable cylinder 3 located in the fireproof cylinder 1 is fixed with a top pad, and a spring 4 is connected between the top pad and the annular cushion 2. The tension of the spring 4 is used to make the outer end of the movable cylinder 3 extend out of the hole to extend into the inner concave cavity 21 and close to the end face of the inner concave cavity 21 before the end cover 5 is covered. At this time, an annular chamber is formed between the movable cylinder 3 and the inner concave cavity 21 of the annular cushion 2, and the annular chamber is used to place fireproof putty to prevent the fireproof putty from adhering to the cable before the end cover 5 is closed, affecting the smoothness of cable movement;

[0028] The inner wall of the end cover 5 is threadedly connected to the outer wall of the port of the fireproof cylinder 1, and a convex pin 53 is fixed on the end face of one side of the boss 52 inserted into the inner concave cavity 21. There are multiple groups of convex pins 53 distributed around the through-hole 51, and the convex pins 53 contact the outer end face of the movable cylinder 3 during the process of tightening the end cover 5 on the fireproof cylinder 1, and as the end cover 5 is screwed closer, the convex pin 53 pushes the movable cylinder 3 inward to stretch the spring 4. At this time, the fireproof putty placed in the annular chamber is squeezed out from the gap between the convex pins 53 by the boss 52 and enters the through-hole 51 and the movable cylinder 3, sealing the through-hole 51 and the movable cylinder 3 and wrapping the cable. As the fireproof putty dries, on the one hand, the fireproof performance of the cable connection is increased, and on the other hand, a certain degree of waterproof sealing is achieved.

[0029] See also Figure 3-Figure 4 , a fireproof connection component for fireproof cables, an external threaded sleeve 22 is fixed on the side of the annular pad 2 close to the fireproof cylinder 1, the outer wall of the external threaded sleeve 22 is connected to the inner wall of the port of the fireproof cylinder 1 through a thread, and the inner diameter of the external threaded sleeve 22 is larger than the aperture of the hole in the center of the annular pad 2.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fireproof connection assembly for a fireproof cable, characterized by: It comprises a fireproof tube (1), wherein the fireproof tube (1) is a cavity structure with two ends open; An annular pad (2) is placed in both side ports of the fireproof cylinder (1), the hole in the center of the annular pad (2) is connected to the fireproof cylinder (1), and the end cover of the fireproof cylinder (1) is provided with an end cover (5), the annular pad (2) is located in the end cover (5) and is covered by the end cover (5), and at the same time, the end face of the end cover (5) is also provided with a through hole (51) for the cable to pass through, and the end face of the annular pad (2) away from the fireproof cylinder (1) is provided with an inner concave cavity (21) for placing fireproof putty, and a boss (52) surrounding the through hole (51) is provided in the end cover (5), and the boss (52) is inserted into the inner concave cavity (21) of the annular pad (2) when the end cover (5) is covered to squeeze the fireproof putty around the cable and seal the through hole (51).

2. A fireproof connection assembly for a fireproof cable according to claim 1, characterized in that: A movable cylinder (3) is slidably installed in the hole of the annular cushion seat (2), and a spring (4) is connected between the end of the movable cylinder (3) located in the ignition cylinder and the annular cushion seat (2).

3. A fireproof connection assembly for a fireproof cable according to claim 2, characterized in that: The inner diameter of the movable cylinder (3) is larger than the diameter of the cable.

4. A fireproof connection assembly for a fireproof cable according to claim 2, characterized in that: A convex needle (53) is fixed on one end surface of the boss (52) inserted into the inner concave cavity (21), and the convex needle (53) contacts the outer end surface of the movable cylinder (3) when the end cover (5) is closed.

5. The fireproof connection assembly for a fireproof cable according to claim 1, characterized in that: The inner wall of the end cover (5) is threadedly connected to the outer wall of the fireproof tube (1), and the through hole (51) is directly opposite to the hole in the center of the annular cushion (2).

6. A fireproof connection assembly for a fireproof cable according to claim 1, characterized in that: An external threaded sleeve (22) is fixed to one side of the annular cushion seat (2) close to the fireproof cylinder (1), and the outer wall of the external threaded sleeve (22) is connected to the inner wall of the port of the fireproof cylinder (1) through threads.

7. The fireproof connection assembly for a fireproof cable according to claim 1, characterized in that: A connecting terminal (6) is placed in the fireproof tube (1), and the connecting terminal (6) is used to fix the ends of the two groups of cables so that they are conductive when powered on.

8. A fireproof connection assembly for a fireproof cable according to claim 4, characterized in that: The convex needles (53) are distributed in multiple groups around the perforation (51).

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