Flame-retardant power cable protection tube

Abstract

The invention relates to the technical field of cable protection pipes, in particular to a flame-retardant power cable protection pipe which comprises a protection pipe body, the outer surface of the protection pipe body is provided with a first semi-hoop, and the upper end and the lower end of the protection pipe body are each provided with a fixing mechanism facilitating cable arrangement and interval fixing. The upper end and the lower end of the protection pipe body are provided with inner fixing rings facilitating limiting of the positions of the fixing mechanisms respectively, the side wall of the protection pipe body is provided with a flame-retardant mechanism facilitating flame retardance of the protection pipe body and a cable in the protection pipe body, and the flame-retardant transom window is formed in the side wall of the protection pipe body in a penetrating mode. And the first screen plate is fixedly connected to the interior of the flame-retardant transom window. According to the flame-retardant power cable protection pipe, the top end of the carbon dioxide gas cylinder arranged in the gas tank is connected with the electromagnetic valve, and the electromagnetic valve is connected with the temperature sensing probe through the wire, so that gas in the gas cylinder can be quickly released for flame-retardant fire extinguishing treatment after open fire temperature rise occurs in the protection pipe main body.

Description

Technical Field

[0001] The present invention relates to the technical field of cable protection pipes, and particularly to a flame-retardant power cable protection pipe. Background Art

[0002] A cable protection pipe is a tubular material used to protect cables from external environmental damage. It is usually made of metal or plastic, has mechanical strength and corrosion resistance, and is widely used in power engineering. The cable protection pipe installed on a utility pole can resist the invasion of external environments such as mechanical force, chemical corrosion, and water penetration, protecting the cable from damage and thus ensuring the long-term stable operation of the cable.

[0003] The above device does not have a structure for quickly and long-term flame retardancy inside the cable protection pipe and fixing the cable wiring interval when in use. When the existing cable protection pipe is in use, although it has a flame-retardant function, when a cable inside catches fire spontaneously, it cannot quickly and long-lastingly extinguish the fire and retard the flame of the cable and the protection pipe until the arrival of rescue. Moreover, when the existing cables are fed into the cable protection pipe, most of the cables arranged inside the pipe are in contact with each other. When the environment is hot or the cables generate heat, the heat is not easily dissipated, which is extremely likely to cause a rapid temperature rise and trigger a fire. In addition, the cable pipes arranged alternately inside the protection pipe are not easy to distinguish between the upper and lower ends during later maintenance. Based on the existing technical deficiencies, the present invention designs a flame-retardant power cable protection pipe. Summary of the Invention

[0004] The present invention provides a flame-retardant power cable protection pipe, which has the advantages of quickly and long-term flame retardancy inside the cable protection pipe and fixing the cable wiring interval.

[0005] The present invention provides the following technical solution: A flame-retardant power cable protection pipe, including a protection pipe main body. A first semi-circular hoop is arranged on the outer surface of the protection pipe main body. Fixing mechanisms for facilitating the fixing of the cable wiring interval are respectively arranged at the upper and lower ends of the protection pipe main body. Inner fixing rings for facilitating the position limitation of the fixing mechanisms are respectively arranged at the upper and lower ends of the protection pipe main body. A flame-retardant mechanism for facilitating the flame retardancy of the protection pipe main body and the cables inside the protection pipe main body is arranged on the side wall of the protection pipe main body;

[0006] Flame retardant mechanism, the flame retardant mechanism includes a flame retardant air window, a first mesh plate, a movable groove, a first limiting block, an air box, a sliding rod, a second limiting block, a third limiting block, a second spring, a sliding plate, a misaligned hole sealing plate, a fourth limiting block, a heat-sensitive glass column, a bottom support, a carbon dioxide gas cylinder, an electromagnetic valve, a wire, a temperature sensing probe, a second fixing bracket and a maintenance window. The flame retardant air window is penetrated and opened on the side wall of the main body of the protection tube. The first mesh plate is fixedly connected inside the flame retardant air window. The movable groove is penetrated and opened on the first mesh plate. The first limiting block is fixedly connected to the top edge of the movable groove on the inner wall of the first mesh plate. The air box is fixedly connected to the position of the flame retardant air window on the outer wall of the main body of the protection tube. The sliding rod is fixedly connected inside the air box. The second limiting block is fixedly connected to the sliding rod. The third limiting block is fixedly connected to the sliding rod. The second spring is sleeved on the sliding rod. The sliding plate is slidably connected to the sliding rod. The misaligned hole sealing plate is fixedly connected to the sliding plate. The fourth limiting block is fixedly connected to the inner side of the misaligned hole sealing plate. The heat-sensitive glass column is fixedly connected between the first limiting block and the fourth limiting block. The bottom support is fixedly connected inside the air box. The carbon dioxide gas cylinder is fixedly connected to the bottom support. The electromagnetic valve is fixedly connected to the top of the carbon dioxide gas cylinder. The wire is fixedly connected to the electromagnetic valve. The temperature sensing probe is fixedly connected to the outer end of the wire. The second fixing bracket is fixedly connected to the temperature sensing probe. The maintenance window is fixedly connected to the outside of the air box.

[0007] As a preferred technical solution of the present invention, the fixing mechanism includes a limiting ring, a limiting groove, a sliding sleeve, an inner groove, a through hole, a connecting column, a clamping block, a first spring, a hoop, a first connecting rod, a tightening rod, a second connecting rod and a fixing nut. The limiting ring is fixedly connected to the inner wall of the inner fixing ring. The limiting groove is opened on the upper surface of the limiting ring. The sliding sleeve is slidably connected to the limiting ring. The inner groove is opened at the top of the inner wall of the sliding sleeve. The through hole is penetrated and opened at the top of the inner groove. The connecting column is slidably inserted into the inner groove and the through hole. The clamping block is fixedly connected to the bottom end of the connecting column. The first spring is sleeved on the connecting column. The hoop is fixedly connected to the inner side of the sliding sleeve. The first connecting rod is clamped at one end of the hoop. The tightening rod is fixedly connected to the first connecting rod. The second connecting rod is penetrated and inserted into the tightening rod. The fixing nut is threadedly connected to the tightening rod.

[0008] As a preferred technical solution of the present invention, connecting cylinders are rotatably connected to both ends of the inner fixing ring, and connecting screws are connected to the connecting cylinders, and a threaded sleeve is threadedly connected between the two connecting screws.

[0009] As a preferred technical solution of the present invention, one side of the first semi-circular hoop is fixedly connected with a first fixing frame, a reinforcing plate is fixedly connected inside the first fixing frame, an adjusting groove is opened at one end of the reinforcing plate, a second semi-circular hoop is slidably clamped inside the adjusting groove, and fixing bolts are threadedly connected between the first semi-circular hoop, the first fixing frame and the second semi-circular hoop.

[0010] As a preferred technical solution of the present invention, a cable outlet pipe is fixedly connected to the top end of the protection pipe main body, a cable inlet pipe is fixedly connected to the bottom end of the protection pipe main body, and sealing mud is arranged inside the cable outlet pipe and the cable inlet pipe.

[0011] As a preferred technical solution of the present invention, two ends of the second spring are respectively fixedly connected to the second limiting block and the sliding plate, the misaligned hole sealing plate is slidably connected to one side of the first net plate, and after the misaligned hole sealing plate moves, its hole position can be aligned with the first net plate under the limitation of the third limiting block, and the fourth limiting block is slidably connected inside the moving groove.

[0012] As a preferred technical solution of the present invention, the second fixing frame is fixedly connected to the misaligned hole sealing plate, and the temperature sensing probe is arranged on one side of the hole position of the misaligned hole sealing plate.

[0013] As a preferred technical solution of the present invention, the clamping block is movably clamped in the limiting groove, the upper and lower ends of the first spring are respectively connected to the sliding sleeve and the top end of the connecting column, the second connecting rod is clamped inside the end of the hoop away from the first connecting rod, and the fixing nut is in contact with the second connecting rod.

[0014] As a preferred technical solution of the present invention, the outer surface of the inner fixing ring is in contact with the inner walls of the cable outlet pipe and the cable inlet pipe.

[0015] As a preferred technical solution of the present invention, the first fixing frame and the first semi-circular hoop are clamped and fixed on the side wall of the protection pipe main body.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. For this flame-retardant power cable protection pipe, when a fire breaks out in the cable within the protection pipe body, the temperature inside the protection pipe body rises rapidly. When the temperature that the thermosensitive glass column can withstand reaches the critical value, it breaks. The lack of support between the first limit block and the fourth limit block causes the second spring to push the sliding plate to move upward rapidly, driving the misaligned hole sealing plate to move upward accordingly, so that the hole positions of the misaligned hole sealing plate align with the hole positions of the first mesh plate. At this time, the protection pipe body is communicated with the inner cavity of the air box, and the hot air in the protection pipe body quickly passes through the first mesh plate and the misaligned hole sealing plate and enters the air box. When the hot air passes through the holes, it will contact the temperature-sensing probe. After the temperature-sensing probe senses the hot air, it opens the solenoid valve through the wire to quickly release the carbon dioxide gas in the carbon dioxide gas cylinder. The gas passes through the holes of the misaligned hole sealing plate and the first mesh plate and quickly enters the protection pipe body, isolating the oxygen in the protection pipe body to extinguish the fire and flame-retardant, while cooling the temperature inside the protection pipe body. Since the cable outlet pipe and the cable inlet pipe at both ends of the protection pipe body are filled with sealing mud, the carbon dioxide gas released in the protection pipe body can be retained for a long time to maintain flame retardancy, leaving a long time for subsequent emergency repairs. This device is convenient for flame-retarding the ignition point inside the protection pipe body.

[0018] 2. For this flame-retardant power cable protection pipe, unscrew the threaded sleeve from the two connecting screws, and slide the corresponding number of hoop rings onto the limiting ring using the sliding sleeve according to the number of cables to be fixed as required. At this time, screw the threaded sleeve back onto the connecting screws, put the upper and lower groups of inner fixing rings back into the cable outlet pipe and the cable inlet pipe, and turn the threaded sleeve to expand the connecting screws to fix the inner fixing rings in the cable outlet pipe and the cable inlet pipe. Then, lift the connecting column upward so that the traction block retracts from the limiting groove into the inner groove to release the fixation of the sliding sleeve. Subsequently, move the sliding sleeve and the hoop rings so that multiple hoop rings are evenly spaced between the inner fixing ring and the limiting ring. At this time, pass the cable through the inside of the cable inlet pipe, the protection pipe body, and the cable outlet pipe from bottom to top, and snap each cable into the hoop rings at the corresponding upper and lower positions. Finally, snap the first connecting rod and the second connecting rod into both ends of the hoop ring and tighten the fixing nut to fix the cable using the hoop ring. This device is convenient for fixing the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of the protection pipe of the present invention;

[0021] Figure 3 It is a schematic diagram of the hoop and fixing frame structure of the present invention;

[0022] Figure 4 It is a schematic diagram of the connection structure of the protection pipe, fixing ring and fixing mechanism of the present invention;

[0023] Figure 5Explosion structure schematic diagram of the fixing ring and fixing mechanism of the present invention;

[0024] Figure 6 Explosion structure schematic diagram of the fixing mechanism of the present invention;

[0025] Figure 7 Inner structure schematic diagram of the flame retardant mechanism of the present invention;

[0026] Figure 8 Explosion structure sectional view of the flame retardant mechanism of the present invention;

[0027] Figure 9 Connection structure schematic diagram of the air tank, gas cylinder and temperature sensing probe of the present invention;

[0028] Figure 10 Connection structure schematic diagram of the air tank and the misaligned hole sealing plate of the present invention.

[0029] In the figure: 1. Protection tube main body; 101. Cable outlet tube; 102. Cable inlet tube; 103. Sealing mud; 2. First half hoop; 201. First fixing frame; 202. Reinforcing plate; 203. Adjusting groove; 204. Second half hoop; 205. Fixing bolt; 3. Inner fixing ring; 301. Connecting cylinder; 302. Connecting screw; 303. Threaded sleeve; 4. Fixing mechanism; 401. Limiting ring; 402. Limiting groove; 403. Sliding sleeve; 404. Inner groove; 405. Through hole; 406. Connecting column; 407. Block; 408. First spring; 409. Hoop; 410. First connecting rod; 411. Tightening rod; 412. Second connecting rod; 413. Fixing nut; 5. Flame retardant mechanism; 501. Flame retardant air window; 502. First mesh plate; 503. Moving groove; 504. First limiting block; 505. Air tank; 506. Slide bar; 507. Second limiting block; 508. Third limiting block; 509. Second spring; 510. Slide plate; 511. Misaligned hole sealing plate; 512. Fourth limiting block; 513. Thermosensitive glass column; 514. Bottom support; 515. Carbon dioxide gas cylinder; 516. Solenoid valve; 517. Wire; 518. Temperature sensing probe; 519. Second fixing frame; 520. Maintenance window. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1-10, A flame-retardant power cable protection pipe, comprising a protection pipe main body 1. A first half-ring hoop 2 is arranged on the outer surface of the protection pipe main body 1. Fixing mechanisms 4 for facilitating the wire arrangement and interval fixation of the cable are respectively arranged at the upper and lower ends of the protection pipe main body 1. Inner fixing rings 3 for facilitating the position limitation of the fixing mechanisms 4 are respectively arranged at the upper and lower ends of the protection pipe main body 1. A flame-retardant mechanism 5 for facilitating the flame retardance of the protection pipe main body 1 and the cable inside the protection pipe main body 1 is arranged on the side wall of the protection pipe main body 1. An outgoing cable pipe 101 is fixedly connected to the top end of the protection pipe main body 1, and an incoming cable pipe 102 is fixedly connected to the bottom end of the protection pipe main body 1. Sealing mud 103 is arranged inside the outgoing cable pipe 101 and the incoming cable pipe 102.

[0032] Please refer to Figure 3 , One side of the first half-ring hoop 2 is fixedly connected with a first fixing frame 201. A reinforcing plate 202 is fixedly connected inside the first fixing frame 201. An adjusting groove 203 is opened at one end of the reinforcing plate 202. A second half-ring hoop 204 is slidably clamped inside the adjusting groove 203. A fixing bolt 205 is threadedly connected between the first half-ring hoop 2, the first fixing frame 201 and the second half-ring hoop 204. The first fixing frame 201 and the first half-ring hoop 2 are clamped and fixed on the side wall of the protection pipe main body 1.

[0033] Please refer to Figures 7-10, a flame retardant mechanism 5, the flame retardant mechanism 5 includes a flame retardant air window 501, a first mesh plate 502, a movable groove 503, a first limiting block 504, an air box 505, a sliding rod 506, a second limiting block 507, a third limiting block 508, a second spring 509, a sliding plate 510, a misaligned hole sealing plate 511, a fourth limiting block 512, a heat-sensitive glass column 513, a bottom support 514, a carbon dioxide gas cylinder 515, an electromagnetic valve 516, a wire 517, a temperature-sensing probe 518, a second fixing bracket 519 and a maintenance window 520. The flame retardant air window 501 is penetrated and opened on the side wall of the protection tube main body 1. The first mesh plate 502 is fixedly connected inside the flame retardant air window 501. The movable groove 503 is penetrated and opened on the first mesh plate 502. The first limiting block 504 is fixedly connected to the top edge of the inner wall movable groove 503 of the first mesh plate 502. The air box 505 is fixedly connected to the position of the flame retardant air window 501 on the outer wall of the protection tube main body 1. The sliding rod 506 is fixedly connected inside the air box 505. The second limiting block 507 is fixedly connected to the sliding rod 506. The third limiting block 508 is fixedly connected to the sliding rod 506. The second spring 509 is sleeved on the sliding rod 506. The sliding plate 510 is slidably connected to the sliding rod 506. The misaligned hole sealing plate 511 is fixedly connected to the sliding plate 510. The fourth limiting block 512 is fixedly connected to the inner side of the misaligned hole sealing plate 511. The heat-sensitive glass column 513 is fixedly connected between the first limiting block 504 and the fourth limiting block 512. The bottom support 514 is fixedly connected inside the air box 505. The carbon dioxide gas cylinder 515 is fixedly connected to the bottom support 514. The electromagnetic valve 516 is fixedly connected to the top end of the carbon dioxide gas cylinder 515. The wire 517 is fixedly connected to the electromagnetic valve 516. The temperature-sensing probe 518 is fixedly connected to the outer end of the wire 517. The second fixing bracket 519 is fixedly connected to the temperature-sensing probe 518. The maintenance window 520 is fixedly connected to the outside of the air box 505. Both ends of the second spring 509 are respectively fixedly connected to the second limiting block 507 and the sliding plate 510. The misaligned hole sealing plate 511 is slidably connected to one side of the first mesh plate 502, and after the misaligned hole sealing plate 511 moves, its hole position can be aligned with the first mesh plate 502 under the limitation of the third limiting block 508. The fourth limiting block 512 is slidably connected inside the movable groove 503. The second fixing bracket 519 is fixedly connected to the misaligned hole sealing plate 511. The temperature-sensing probe 518 is arranged on one side of the hole position of the misaligned hole sealing plate 511.

[0034] By setting the flame-retardant air window 501, the first mesh plate 502, the air box 505, the misaligned hole sealing plate 511, the carbon dioxide gas cylinder 515 and the solenoid valve 516, it is convenient to make the inner cavities of the protection tube main body 1 and the air box 505 communicate, and send the carbon dioxide gas in the carbon dioxide gas cylinder 515 into the protection tube main body 1 for fire extinguishing and flame retardant treatment. By setting the first limit block 504, the fourth limit block 512, the heat-sensitive glass column 513, the second spring 509 and the sliding plate 510, it is convenient for the hole positions of the first mesh plate 502 and the misaligned hole sealing plate 511. After the temperature of the cable in the protection tube main body 1 rises due to fire, the heat-sensitive glass column 513 can be quickly broken, and the misaligned hole sealing plate 511 is pushed by the second spring 509 and the sliding plate 510 to align the hole positions with the first mesh plate 502 to connect the protection tube main body 1 with the inner cavity of the air box 505. By setting the wire 517 and the temperature-sensing probe 518, it is convenient to control the opening of the solenoid valve 516 according to the temperature in the protection tube main body 1.

[0035] Please refer to Figures 4-6 , the fixing mechanism 4 includes a limit ring 401, a limit groove 402, a sliding sleeve 403, an inner groove 404, a through hole 405, a connecting column 406, a clamping block 407, a first spring 408, a hoop 409, a first connecting rod 410, a tightening rod 411, a second connecting rod 412 and a fixing nut 413. The limit ring 401 is fixedly connected to the inner wall of the inner fixing ring 3. The limit groove 402 is opened on the upper surface of the limit ring 401. The sliding sleeve 403 is slidably connected to the limit ring 401. The inner groove 404 is opened at the top of the inner wall of the sliding sleeve 403. The through hole 405 is penetrated and opened at the top of the inner groove 404. The connecting column 406 is slidably inserted into the inner groove 404 and the through hole 405. The clamping block 407 is fixedly connected to the bottom end of the connecting column 406. The first spring 408 is sleeved on the connecting column 406. The hoop 409 is fixedly connected to the inner side of the sliding sleeve 403. The first connecting rod 410 is clamped at one end of the hoop 409. The tightening rod 411 is fixedly connected to the first connecting rod 410. The second connecting rod 412 is penetrated and inserted into the tightening rod 411. The fixing nut 413 is threadedly connected to the tightening rod 411. The clamping block 407 is movably clamped in the limit groove 402. The upper and lower ends of the first spring 408 are respectively connected to the sliding sleeve 403 and the top end of the connecting column 406. The second connecting rod 412 is clamped at the inner side of the hoop 409 away from the first connecting rod 410. The fixing nut 413 is in contact with the second connecting rod 412.

[0036] By setting the limit ring 401, the sliding sleeve 403 and the hoop 409, it is convenient to connect with the inner fixing ring 3 to fix the cable at intervals for cable management. By setting the limit groove 402, the inner groove 404, the through hole 405, the connecting column 406, the clamping block 407 and the first spring 408, it is convenient to lock the positions of the adjusted hoop 409 and the sliding sleeve 403 to prevent the positions of the hoop 409 and the sliding sleeve 403 from deflecting due to the pushing of the cable. By setting the first connecting rod 410, the tightening rod 411, the second connecting rod 412 and the fixing nut 413, it is convenient to control the hoop 409 to clamp and fix cables of different sizes.

[0037] Please refer to Figure 4 , there are connecting cylinders 301 rotatably connected to both ends of the inner fixing ring 3. A connecting screw rod 302 is connected to the connecting cylinder 301. A threaded sleeve 303 is threadedly connected between the two connecting screw rods 302. The outer surface of the inner fixing ring 3 is in contact with the inner walls of the cable outlet pipe 101 and the cable inlet pipe 102.

[0038] By setting the connecting cylinder 301, it is convenient to fix the fixing mechanism 4 inside the cable outlet pipe 101 and the cable inlet pipe 102. By setting the connecting cylinder 301, the connecting screw rod 302 and the threaded sleeve 303, it is convenient to control the inward contraction or outward expansion of the connecting cylinder 301, so that the inner fixing ring 3 can be fixed inside the cable outlet pipe 101 or the cable inlet pipe 102, and at the same time, the inner fixing ring 3 can be fixed inside the cable outlet pipe 101 or the cable inlet pipe 102 of different sizes.

[0039] Working principle: when a flame retardant power cable protection tube is used, in the initial state, first, the cable outlet tube 101 and the cable inlet tube 102 are arranged at the upper and lower ends of the protection tube body 1, and the inner fixing ring 3 arranged in the cable outlet tube 101 and the cable inlet tube 102 is fixed by controlling the tightening of the inner fixing ring 3 by the connecting tube 301, the connecting screw 302 and the threaded sleeve 303, and the limiting ring 401 and the limiting groove 402 arranged on the inner fixing ring 3 are slidably connected with the sliding sleeve 403, and the two ends of the hoop 409 arranged on one side of the sliding sleeve 403 are respectively connected with the first connecting rod 410, the tightening rod 411, the second connecting rod 412 and the fixing nut 413, so as to facilitate the cable arrangement and keep the interval in the protection tube body 1, and the fixing nut 413 is fixed on the side wall of the protection tube body 1. The connected gas box 505 is arranged on one side of the flame retardant window 501 opened on the side wall of the protection tube body 1, and the staggered hole sealing plate 511 that slides and rises in the gas box 505 contacts the first mesh plate 502 that is fixedly connected in the flame retardant window 501, and a heat-sensitive glass column 513 is installed between the fourth limit block 512 set on the staggered hole sealing plate 511 and the first limit block 504 on the movable groove 503, so as to control the connection between the protection tube body 1 and the chamber of the gas box 505, and the top of the carbon dioxide gas cylinder 515 set in the gas box 505 is connected to the electromagnetic valve 516, and the electromagnetic valve 516 is connected to the temperature sensing probe 518 through the wire 517, so that after the open flame occurs and the temperature rises in the protection tube body 1, the gas in the gas cylinder can be quickly released for flame retardant and fire extinguishing treatment;

[0040] When it is necessary to flame retard the fire point in the protection tube body 1, first, when the cable in the protection tube body 1 catches fire, the temperature in the protection tube body 1 rises rapidly, so that the heat-sensitive glass column 513 can withstand the temperature and break after reaching the critical value. There is a lack of support between the first limit block 504 and the fourth limit block 512, and the second spring 509 pushes the slide plate 510 to move up quickly and drives the staggered hole sealing plate 511 to move up accordingly, so that the hole position of the staggered hole sealing plate 511 is aligned with the hole position of the first mesh plate 502. At this time, the protection tube body 1 is connected with the inner cavity of the air box 505, and the hot air in the protection tube body 1 quickly passes through the first mesh plate 502 and the staggered hole sealing plate 511 into the air box 505. When the hot air passes through the hole, it will contact with the sensitive glass column 513. The temperature probe 518 contacts the heat exchanger, and after the temperature probe 518 senses the hot air, it opens the solenoid valve 516 through the wire 517 to quickly release the carbon dioxide gas in the carbon dioxide cylinder 515, and the gas passes through the holes of the staggered sealing plate 511 and the first mesh plate 502 and quickly enters the protection tube body 1, isolating the oxygen in the protection tube body 1 to extinguish the fire while cooling the temperature in the protection tube body 1. Since the cable outlet pipe 101 and the cable inlet pipe 102 at both ends of the protection tube body 1 are filled with sealing mud 103, the carbon dioxide gas released in the protection tube body 1 can be retained for a long time to remain flame retardant, and can be retained for a long time for subsequent emergency repairs. The device is convenient for flame retardant of the fire point in the protection tube body 1.

[0041] When it is necessary to fix the cable, first unscrew the threaded sleeve 303 from the two connecting screws 302, and slide and sleeve the corresponding number of hoop rings 409 onto the limiting ring 401 according to the number of cables to be fixed. At this time, screw the threaded sleeve 303 back onto the connecting screw 302, and put the upper and lower groups of inner fixing rings 3 back into the cable outlet pipe 101 and the cable inlet pipe 102, and turn the threaded sleeve 303 to expand the connecting screw 302 to fix the inner fixing ring 3 in the cable outlet pipe 101 and the cable inlet pipe 102. Then, lift the connecting column 406 upward so that the traction block 407 is retracted from the limiting groove 402 into the inner groove 404 to release the fixation of the sliding sleeve 403. Subsequently, move the sliding sleeve 403 and the hoop ring 409 so that multiple groups of hoop rings 409 are evenly arranged between the inner fixing ring 3 and the limiting ring 401. At this time, pass the cable through the inside of the cable inlet pipe 102, the main body of the protection pipe 1, and the cable outlet pipe 101 from bottom to top, and snap each cable into the hoop rings 409 at the corresponding upper and lower positions. Finally, snap the first connecting rod 410 and the second connecting rod 412 into both ends of the hoop ring 409 and tighten the fixing nut 413 to fix the cable with the hoop ring 409. This device is convenient for fixing the cable.

[0042] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flame-retardant power cable protection tube, comprising a protection tube body (1), characterized in that: The outer surface of the protection tube body (1) is provided with a first half hoop (2); the upper and lower ends of the protection tube body (1) are respectively provided with fixing mechanisms (4) for arranging and fixing cables at intervals; the upper and lower ends of the protection tube body (1) are respectively provided with inner fixing rings (3) for limiting the position of the fixing mechanisms (4); the side wall of the protection tube body (1) is provided with a flame retardant mechanism (5) for flame retardant the protection tube body (1) and the cables inside the protection tube body (1); The flame retardant mechanism (5) comprises a flame retardant gas window (501), a first mesh plate (502), a movable groove (503), a first limit block (504), a gas box (505), a sliding rod (506), a second limit block (507), a third limit block (508), a second spring (509), a sliding plate (510), a staggered hole sealing plate (511), a fourth limit block (512), a thermosensitive glass column (513), a bottom bracket (514), a carbon dioxide gas cylinder (515), a solenoid valve (516), a wire (517), a temperature sensing probe (518), and a third limit block (519). The first mesh plate (502) is fixedly connected to the inside of the flame retardant window (501); the first movable groove (503) is penetrated and opened on the first mesh plate (502); the first limit block (504) is fixedly connected to the top edge of the movable groove (503) on the inner wall of the first mesh plate (502); the gas box (505) is fixedly connected to the flame retardant window (501) on the outer wall of the protection tube body (1); the sliding rod (506) is fixedly connected to the gas box (505); The first limit block (504) and the second limit block (505) are fixedly connected to the slide bar (506), the third limit block (508) is fixedly connected to the slide bar (506), the second spring (509) is sleeved on the slide bar (506), the slide plate (510) is slidably connected to the slide bar (506), the staggered hole sealing plate (511) is fixedly connected to the slide plate (510), the fourth limit block (512) is fixedly connected to the inner side of the staggered hole sealing plate (511), and the heat-sensitive glass column (513) is fixedly connected to the first limit block (504) and the fourth limit block (514). The bottom bracket (514) is fixedly connected to the inside of the gas box (505), the carbon dioxide gas cylinder (515) is fixedly connected to the bottom bracket (514), the solenoid valve (516) is fixedly connected to the top of the carbon dioxide gas cylinder (515), the wire (517) is fixedly connected to the solenoid valve (516), the temperature sensing probe (518) is fixedly connected to the outer end of the wire (517), the second fixing frame (519) is fixedly connected to the temperature sensing probe (518), and the inspection window (520) is fixedly connected to the outside of the gas box (505).

2. The flame-retardant power cable protection tube according to claim 1, characterized in that: The fixing mechanism (4) comprises a limiting ring (401), a limiting groove (402), a sliding sleeve (403), an inner groove (404), a through hole (405), a connecting column (406), a block (407), a first spring (408), a hoop (409), a first connecting rod (410), a tightening rod (411), a second connecting rod (412) and a fixing nut (413); the limiting ring (401) is fixedly connected to the inner wall of the inner fixing ring (3); the limiting groove (402) is provided on the upper surface of the limiting ring (401); the sliding sleeve (403) is slidably connected to the limiting ring (401); the inner groove (404) is provided on the top of the inner wall of the sliding sleeve (403); the through hole (405) is provided on the inner wall of the sliding sleeve (403); 5) is penetrated through the top of the inner groove (404), the connecting column (406) is slidably inserted into the inner groove (404) and the through hole (405), the block (407) is fixedly connected to the bottom end of the connecting column (406), the first spring (408) is sleeved on the connecting column (406), the hoop (409) is fixedly connected to the inner side of the sliding sleeve (403), the first connecting rod (410) is clamped on one end of the hoop (409), the clamping rod (411) is fixedly connected to the first connecting rod (410), the second connecting rod (412) is penetrated and inserted into the clamping rod (411), and the fixing nut (413) is threadedly connected to the clamping rod (411).

3. The flame-retardant power cable protection tube according to claim 1, characterized in that: The two ends of the inner fixing ring (3) are rotatably connected to connecting tubes (301), the connecting tubes (301) are connected to connecting screws (302), and a threaded sleeve (303) is threadedly connected between the two connecting screws (302).

4. The flame-retardant power cable protection tube according to claim 1, characterized in that: A first fixing frame (201) is fixedly connected to one side of the first half hoop (2); a reinforcing plate (202) is fixedly connected to the interior of the first fixing frame (201); an adjusting groove (203) is provided at one end of the reinforcing plate (202); a second half hoop (204) is slidably engaged with the inner side of the adjusting groove (203); and a fixing bolt (205) is threadedly provided between the first half hoop (2), the first fixing frame (201) and the second half hoop (204).

5. The flame-retardant power cable protection tube according to claim 1, characterized in that: The top end of the protection tube body (1) is fixedly connected to a cable outlet pipe (101), and the bottom end of the protection tube body (1) is fixedly connected to a cable inlet pipe (102). Sealing mud (103) is provided inside the cable outlet pipe (101) and the cable inlet pipe (102).

6. The flame-retardant power cable protection tube according to claim 1, characterized in that: The two ends of the second spring (509) are respectively fixedly connected to the second limiting block (507) and the slide plate (510); the staggered hole sealing plate (511) is slidably connected to one side of the first mesh plate (502); and after the staggered hole sealing plate (511) moves, it is limited by the third limiting block (508) so that its hole position can be aligned with the first mesh plate (502); and the fourth limiting block (512) is slidably connected to the inside of the movable groove (503).

7. The flame-retardant power cable protection tube according to claim 1, characterized in that: The second fixing frame (519) is fixedly connected to the staggered hole sealing plate (511), and the temperature sensing probe (518) is arranged on one side of the hole position of the staggered hole sealing plate (511).

8. The flame-retardant power cable protection tube according to claim 2, characterized in that: The clamping block (407) is movably clamped in the limiting groove (402), the upper and lower ends of the first spring (408) are respectively connected to the top of the sliding sleeve (403) and the connecting column (406), the second connecting rod (412) is clamped in one end of the hoop (409) away from the first connecting rod (410), and the fixing nut (413) is in contact with the second connecting rod (412).

9. The flame-retardant power cable protection tube according to claim 3, characterized in that: The outer surface of the inner fixing ring (3) contacts the inner walls of the cable outlet pipe (101) and the cable inlet pipe (102).

10. The flame-retardant power cable protection tube according to claim 4, characterized in that: The first fixing frame (201) and the first half hoop (2) are clamped and fixed on the side wall of the protection tube body (1).

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