Waterproof and fireproof plugging structure for cable trench

Abstract

The utility model discloses a waterproof and fireproof plugging structure for a cable trench, which particularly relates to the technical field of electric power facilities and comprises a cable trench and a threading plate fixedly arranged on the cross section of a port of the cable trench. The threading plate comprises a plate body, and a groove formed in the plate body is combined with the cross section of the port of the cable trench to form a wire inlet hole; the plate body is provided with a plurality of holes used for installing the threading plug pipes, the cable gland and the standby cable gland plate, and the threading plug pipes and the cable gland are used for fixing a penetrating cable. A first screw thread and a second screw thread are respectively arranged at two ends of the threading plug pipe in a sleeving manner, plug heads are fixedly mounted at ports of first ends of the first screw thread and the second screw thread, plug nuts are in threaded connection in ports of the plug heads, and a heat shrink tube is fixedly mounted in a port of a second end of the first screw thread and the second screw thread. Compared with the prior art, the cable trench has the advantages of limited cost increase, reliable performance and convenience in design and construction, so that the waterproof and fireproof economical efficiency, safety and reliability of the cable trench are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power facilities technical field, concretely relates to a cable trench waterproof fireproof plugging structure. BACKGROUND

[0002] Cable trench is a common cable laying mode, but the cable trench is usually located below ground level, when a large number of cables are laid along the cable trench from outdoor into the distribution room, the water intrusion is caused by the incompletion of plugging, the indoor moisture rises, the humidity is big, the cable blasting is easily caused, the iron material is easily corroded and rusted, or the elements in the distribution cabinet not plugged tightly are easily dampened to cause unstable performance, which seriously threatens the safety and reliability of production. A small amount of cables can be prevented from water and fire by targeted measures, but for a large number of cables, these measures are difficult to achieve due to various reasons in actual implementation, and sometimes only the laying mode of cable trench into the distribution room can be avoided.

[0003] At present, for a large number of cables from outdoor cable trench into the house, one solution is to raise the distribution room as a whole, so that the indoor trench bottom is raised to be higher than the outdoor ground level, which fundamentally prevents the possibility of water entering the distribution room, but this undoubtedly greatly increases the cost of civil structure, and the length of the cable increases by 1.5 meters, causing the cost of the cable to rise. Another solution is to use cable wall-penetrating plugging modules, which need to select corresponding modules according to the outer diameter of each cable. When the number of cables is large, the total cost is high, and the complexity of design and installation is also discouraging. SUMMARY

[0004] The utility model aims at providing a cable trench waterproof fireproof plugging structure, which aims to solve the problem that outdoor cables are easily introduced into the room when laid through the cable trench.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A cable trench waterproof fireproof plugging structure, comprising a cable trench and a threading plate fixedly arranged on the port section of the cable trench.

[0007] The threading plate comprises a plate body, and a groove is formed on the plate body and combined with the port section of the cable trench to form a wire inlet hole.

[0008] A plurality of holes for installing threading plugs, glands and backup glands are formed on the plate body, and the threading plugs and glands are used to fix the cables.

[0009] The threading plug pipe is provided with a first screw thread and a second screw thread at two ends respectively, a plug head is fixedly installed at a first end port of the first screw thread and the second screw thread, a plug nut is threadedly connected in the port of the plug head, and a heat shrink tube is fixedly installed in the port of a second end.

[0010] Preferably, the cable trench is divided into indoor and outdoor trenches according to installation positions, and a water collecting well is formed on the indoor trench; and a cable trench inner step and a cable trench boss are fixedly arranged on the outdoor trench.

[0011] Preferably, a waterproof mortar groove is formed in the port section of the cable trench.

[0012] Preferably, the plate body is made of stainless steel sheet.

[0013] Preferably, the plate body is provided with a flange at each side edge, the threading plate comprises a concrete covering part, the plate body and the flange are located in the concrete covering part, and a fireproof plate is fixedly arranged on the side surface of the concrete covering part.

[0014] Preferably, a plastic mouth guard is fixedly arranged on the inner wall of the two ends of the threading plug pipe.

[0015] Preferably, a plurality of the threading plug pipes are installed on the plate body in descending order from top to bottom according to pipe diameters.

[0016] Preferably, a submersible sewage pump, a liquid level switch and an electric control box are arranged in the water collecting well, and the liquid level switch is used to detect high and low water levels of the water collecting well.

[0017] Preferably, a drainage slope is arranged at the bottom of the cable trench to form a conical structure in the whole cross section, and the water collecting well is located at the low position of the conical structure.

[0018] Preferably, a flexible fireproof filling material is filled between the threading plug pipe and the cable.

[0019] Preferably, the ratio of the heat shrink tube to the cable radius is 4:1 or 3:1 or 2:1.

[0020] Preferably, the indoor and outdoor trenches are arranged to have a height difference of not less than 300 mm, and the indoor and outdoor floor surfaces have a height difference of not less than 300 mm.

[0021] Preferably, the threading plate and the cable are coated with fireproof paint.

[0022] In the above technical solution, the cable trench waterproof and fireproof plugging structure has the following beneficial effects: the conventional cable can effectively avoid the problem of being difficult to waterproof when being laid in the cable trench from the outdoor to the indoor or the problem of high cost of the measures taken, the cable arrangement order is adjusted, the heat shrink tube with a large shrinkage ratio is sleeved on the threading plug pipe, and a large number of control cables or small power cables are directly threaded through the hole above the threading board which is raised by several sizes from the outdoor ground, the structure design greatly reduces the difficulty of engineering design and actual construction, and the threading board can be designed only by simply estimating the equipment power and the number of times multiplied by the standby coefficient.

[0023] And by fully utilizing the characteristics of the heat shrink tube with a large shrinkage ratio and good waterproof performance, the structure has the effects of simple design and installation, reliable waterproof and fireproof performance, and reduced construction cost compared with the existing measures. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0025] Figure 1 A structural front view schematic diagram of the cable trench waterproof and fireproof plugging structure according to the embodiments of the present application is provided.

[0026] Figure 2 A structural right view schematic diagram of the cable trench waterproof and fireproof plugging structure according to the embodiments of the present application is provided.

[0027] Figure 3 A structural top view schematic diagram of the cable trench waterproof and fireproof plugging structure according to the embodiments of the present application is provided.

[0028] Figure 4 A threading plug pipe schematic diagram of the cable trench waterproof and fireproof plugging structure according to the embodiments of the present application is provided.

[0029] Figure 5 A threading board opening schematic diagram of the cable trench waterproof and fireproof plugging structure according to the embodiments of the present application is provided.

[0030] BRIEF DESCRIPTION OF DRAWINGS

[0031] 1, cable trench; 2, threading plate; 201, plate body; 202, flange; 203, spare gland plate fixing screw opening; 204, spare gland plate opening; 205, threading plug pipe opening; 3, spare gland plate; 4, gland head; 5, threading plug pipe; 501, plug nut; 502, plug head; 503, first thread; 504, short pipe; 505, second thread; 506, mouth guard; 6, cable; 7, electric control box; 8, water collecting well; 9, sewage pump; 10, liquid level switch; 11, drainage slope; 12, waterproof mortar groove; 13, fireproof plate; 14, heat shrink tube; 15, manhole; 16, wire inlet hole; 17, cable trench step; 18, cable trench boss. DETAILED DESCRIPTION

[0032] In order to make the technical personnel in the field better understand the technical scheme of the utility model, the utility model will be further described in detail below with reference to the drawings.

[0033] As shown in the drawings, Figures 1-5 A cable trench waterproof and fireproof plugging structure, comprising a cable trench 1, a threading plate 2 is cast on the wall of the cable trench 1 at the junction between the indoor and outdoor, and because the port cross section of the cable trench 1 is provided with a waterproof mortar groove 12, the cable trench 1 and the threading plate 2 can be installed in time and do not need to be integrally formed.

[0034] The threading plate 2 in the above embodiment comprises a plate body 201, and flanges 202 are arranged on the four sides of the plate body 201 respectively, and the plate body 201 is wrapped during the concrete casting process, so as to form a concrete covering part. The side surface of the plate body 201 is fixedly provided with a fireproof plate 13.

[0035] Further, the threading plate 2 is provided with a wire inlet hole 16 at the upper part; the plate body 201 is provided with a plurality of holes arranged in order in size, and the holes comprise a spare gland plate opening 204 and a spare gland plate fixing screw opening 203 arranged at four corners of the spare gland plate opening 204, and a threading plug pipe opening 205; the threading plug pipe 5, the gland head 4 and the spare gland plate 3 are arranged on the holes; the threading plug pipe 5 is sealingly welded on the plate body 201; the gland head 4 through which a small cable passes is arranged at the upper part of the threading plate 2, and the cable 6 can pass through the holes of the threading plug pipe 5 or the gland head 4. The outer surface of the two ends of the threading plug pipe 5 is sleeved with a first thread 503 and a second thread 505. One end of the two threads is provided with a plug head 502 for waterproofing, and the plug head 502 is provided with a plug nut 501 for convenient disassembly and assembly, and the other end is pre-sleeved with a heat shrink tube 14.

[0036] The cable trench 1 is divided into indoor trench and outdoor trench according to installation position, and the indoor trench is provided with a water collecting well 8; the cable trench inner step 17 and the cable trench boss 18 are arranged at the wall-joining position of the outdoor trench, and the height difference between the indoor trench and the outdoor trench is not less than 300mm due to the arrangement of the cable trench inner step 17, and the height difference between the indoor floor and the outdoor floor is not less than 300mm.

[0037] Furthermore, the cable trench outer wall is a boundary line for dividing the cable trench 1 into indoor trench and outdoor trench, and the cable trench outer wall is externally provided with an outwardly expanded manhole well 15, the manhole well 15 is directly communicated with the cable trench 1 on one side close to the trench wall, so that the heat shrinkable tube 14 is more convenient to install for the cable 6, especially when the number of cables 6 is large and dense; the ratio of the radius of the heat shrinkable tube 14 to the cable 6 is 4:1 or 3:1 or 2:1, which can be flexibly selected according to the size comparison between the outer diameter of the cable 6 and the threading plug tube 5.

[0038] In the above technology, the problems that it is difficult to prevent water from entering from outdoor to indoor when the conventional cable 6 is laid in the cable trench 1 or the measures taken are costly can be effectively avoided, the arrangement order of the cable 6 is adjusted, the heat shrinkable tube 14 with large shrinkage ratio is sleeved on the threading plug tube 5, and a large number of control cables 6 or small power cables 6 are directly threaded through the hole above the threading board 2 which is high above the outdoor ground by a certain size, so that the difficulty of engineering design and actual construction is greatly reduced, and the design of the threading board 2 can be completed by simply estimating the equipment power and number multiplied by the standby coefficient.

[0039] And by fully utilizing the characteristics that the heat shrinkable tube 14 has large shrinkage ratio and good waterproof performance, the structure has the effects of simple design and installation, reliable waterproof and fireproof performance and reduced construction cost compared with the existing measures.

[0040] As a further provided embodiment of the utility model, the indoor trench water collecting well 8 is provided with a submersible sewage pump 9, a liquid level switch 10 and an electric control box 7, the electric control box 7 controls the start and stop of the submersible sewage pump 9 by detecting the water level in the water collecting well 8 through the liquid level switch 10, so that automatic drainage can be realized when the cable trench 1 is accidentally waterlogged or the underground water level is high and the cable trench 1 wall seepage enters the cable trench 1, and the cable trench 1 is provided with a drainage slope 11 to make the water in the trench gather.

[0041] As a further provided embodiment of the utility model, a plurality of threading plug tubes 5 are sequentially installed on the plate body 201 from bottom to top according to the tube diameter from large to small, and the inner walls at both ends of the threading plug tube 5 are fixedly provided with plastic mouth guards 506.

[0042] Specifically, the threading plug pipe 5 is arranged in the threading plate 2 in the order from large pipe to small pipe from bottom to top, that is, the thicker high-voltage cable 6 is arranged at the bottom, the low-voltage cable 6 is arranged in the middle, and the control cable 6 is arranged at the top, which is usually beneficial to the thicker cable 6 to have a proper bending radius to turn into the cabinet, while reducing the number of openings at the lower part of the plate, so that the large number of control cables 6 and the small power cable 6 which is convenient to bend can be easily and orderly threaded from the large hole above the ground by several sizes

[0043] As further provided in an embodiment of the utility model, the threading plug pipe 5 is filled with flexible fireproof material, such as flexible fireproof material of aluminum silicate fiber and organic fireproof plug material, after the cable 6 is laid.

[0044] As further provided in an embodiment of the utility model, the threading plate 2 and the cable 6 are coated with fireproof paint. The fireproof paint is a special fireproof paint for cables.

[0045] Working principle: when in use, the threading plate 2 with the assembled threading plug pipe 5 is poured into the cable trench 1, and the left, right and lower parts are waterproofed by waterproof mortar; when the cable 6 is threaded, the hot shrink tube 14 is first sleeved, the plug head 502 is unscrewed, the cable 6 is threaded, after the cable 6 is threaded, the fireproof plug material is filled into the short pipe 504, one end of the hot shrink tube 14 is fixed on the second screw 505, the other end is on the threaded cable 6, the hot air gun is used to heat the hot shrink tube 14 to tightly wrap the threading plug pipe 5 and the cable 6, the smaller control cable 6 can be threaded into the threading plate 2 from the threading hole 16 above, and the fireproof groove box can be arranged to facilitate the subsequent addition of the cable 6.

[0046] The above only describes certain exemplary embodiments of the utility model in a descriptive manner, without doubt, for ordinary skilled in the art, the described embodiments can be modified in various ways without deviating from the spirit and scope of the utility model. Therefore, the above drawings and description are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the utility model.

Claims

1. A cable trench waterproof and fireproof sealing structure, characterized in that: It comprises a cable trench (1) and a threading plate (2) fixedly arranged on the port cross section thereof; The threading plate (2) includes a plate body (201), and a groove provided on the plate body (201) is combined with a cross section of a port of the cable trench (1) to form a wire entry hole (16); The plate body (201) is provided with a plurality of holes for installing a threading plug (5), a cable gland (4) and a spare cable gland (3), wherein the threading plug (5) and the cable gland (4) are used to fix the passing cable (6); The two ends of the threading plug (5) are respectively sleeved with a first thread (503) and a second thread (505); the first end ports of the first thread (503) and the second thread (505) are fixedly installed with a thread plug (502); the port of the thread plug (502) is internally threadedly connected to a thread plug nut (501); and the port of the second end is fixedly installed with a heat shrink tube (14).

2. A cable trench waterproof and fireproof sealing structure according to claim 1, characterized in that: The cable trench (1) is divided into an indoor trench and an outdoor trench according to the installation position. A water collection well (8) is provided on the indoor trench, and a cable trench inner step (17) and a cable trench boss (18) are fixedly provided on the outdoor trench.

3. A cable trench waterproof and fireproof sealing structure according to claim 1, characterized in that: A waterproof mortar groove (12) is provided at the end cross section of the cable trench (1).

4. A cable trench waterproof and fireproof sealing structure according to claim 1, characterized in that: The plate body (201) is made of a stainless steel thin plate.

5. A cable trench waterproof and fireproof sealing structure according to claim 1, characterized in that: The four sides of the plate body (201) are respectively provided with flanges (202); the threading plate (2) comprises a concrete covering portion; the plate body (201) and the flanges (202) are both located within the concrete covering portion; and a fireproof plate (13) is fixedly provided on the side of the concrete covering portion.

6. A cable trench waterproof and fireproof sealing structure according to claim 1, characterized in that: Plastic guards (506) are fixedly provided on the inner walls of both ends of the threading and blocking tube (5).

7. A cable trench waterproof and fireproof sealing structure according to claim 1, characterized in that: The plurality of wire threading and pipe blocking devices (5) are installed on the plate body (201) in order from bottom to top according to the pipe diameter from large to small.

8. A cable trench waterproof and fireproof sealing structure according to claim 2, characterized in that: A submersible sewage pump (9), a liquid level switch (10) and an electric control box (7) are provided in the water collection well (8). The liquid level switch (10) is used to detect the high and low water levels of the water collection well (8).

9. A cable trench waterproof and fireproof sealing structure according to claim 8, characterized in that: A drainage slope (11) is provided at the bottom of the cable trench (1) so that the overall cross section is a conical structure, and the water collection well (8) is located at the lower position of the conical structure.

10. A cable trench waterproof and fireproof sealing structure according to claim 1, characterized in that: A flexible fireproof filling material is filled between the threading and blocking pipe (5) and the cable (6).

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