Cable trench fireproof device with electric leakage detection function

Abstract

The utility model discloses a cable trench fireproof device with an electric leakage detection function, which comprises a U-shaped box main body and a plurality of groups of stacked plugging frames, the plurality of groups of plugging frames are fixed in the box main body, the plurality of groups of plugging frames and the box main body form a box body, and the box body is filled with fireproof mud; each group of plugging frames is provided with a plurality of cable holes for installing cables, and a current transformer is arranged outside each cable in the box main body; a box cover is arranged at the top of one side of the box body, the box body is hinged to one end of the box cover, and the other end of the box cover is fixedly connected with the other side of the box body. According to the utility model, the box body and the plurality of plugging frames form a box body structure for accommodating fireproof mud, and the plurality of plugging frames are arranged in a stacked manner, thereby facilitating the arrangement of a plurality of groups of cables, and improving the laying and maintenance efficiency of the cables. According to the utility model, the current transformer is arranged outside the cable and is matched with a sealing structure formed by the box main body, the plurality of plugging frames and the fireproof mud, so that the detection service life is longer.

Description

Technical Field

[0001] The utility model relates to the technical field of cable trench fire prevention, in particular to a cable trench fire prevention device with a leakage detection function. Background Art

[0002] A fire wall refers to a non-combustible wall with a fire resistance limit of not less than three hours that prevents the spread of fire to adjacent areas. It is an important partition component used to divide fire zones or prevent the spread of fire between buildings. When a fire occurs in a cable trench, the fire will spread through the gaps around the cable trench. Therefore, blocking the fire wall in the cable trench can prevent the spread of fire and further protect the equipment in the substation.

[0003] The existing cable fire wall is generally formed by building a fireproof board on site to form a box-shaped space to accommodate the cable line, and then filling the box-shaped space with flame retardant materials to form a fire wall. The construction process of this method is time-consuming and labor-intensive, and the construction and installation of the cable line is relatively troublesome. Furthermore, the fire wall has a good sealing and fireproofing effect, but the cable fire wall has a relatively simple function, and it is necessary to make full use of the sealing and fireproofing performance of the fire wall. Therefore, it is necessary to propose a cable trench fire prevention device with leakage detection function that is easy to install, convenient for cable routing and installation, and convenient for subsequent maintenance. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the utility model provides a cable trench fire prevention device with a leakage detection function, which is convenient for installation, cable routing installation, and subsequent maintenance.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is: it includes a U-shaped box body and several groups of stacked sealing frames, several groups of sealing frames are fixed in the box body, several groups of sealing frames and the box body form a box body, and the box body is filled with fireproof mud; each group of sealing frames is provided with a plurality of cable holes for installing cables, and a current transformer is provided outside each cable line located in the box body; a box cover is provided on the top of one side of the box body, the box body is hinged to one end of the box cover, and the other end of the box cover is fixedly connected to the other side of the box body.

[0006] Furthermore, the blocking frame includes an upper frame body and a lower frame body with the same structure, and each cable hole is evenly spaced and arranged on the upper frame body and the lower frame body.

[0007] Furthermore, the left and right sides of the upper frame and the lower frame are respectively provided with limit blocks that cooperate with the box body, the two limit blocks on the left side are snap-fitted with the left side of the box body, and the two limit blocks on the right side are snap-fitted with the right side of the box body.

[0008] Furthermore, a hinged opening is provided at the hinged end of the box cover, and a mounting opening is provided at the movable end of the box cover, and the hinged opening and the mounting opening are matched with the top of the box body.

[0009] Furthermore, two rotating shafts are arranged on the hinged side of the box body, two hinged parts are arranged on the hinged end of the box cover, through holes for installing the rotating shafts are arranged on the hinged parts, and the rotating shafts are threadedly connected to the box body.

[0010] Furthermore, the movable end of the box cover is connected to the box body by means of screws or locks.

[0011] Furthermore, a U-shaped handle is provided on the top of the box cover, and the handle is fixed to the box cover by a plurality of screws.

[0012] Furthermore, a plug is provided in each cable hole, and the plug includes a circular limiting portion and a cable hole portion cooperating with the cable hole, and the cable hole portion and the circular limiting portion are designed as an integral whole.

[0013] Furthermore, the plug is made of rubber or plastic.

[0014] Furthermore, the box body, the sealing frame and the box cover are all made of glass magnesium board.

[0015] The beneficial effects of the utility model are:

[0016] The utility model.

[0017] The utility model forms a box structure for accommodating fireproof mud through a box main body and a plurality of sealing frames. The plurality of sealing frames are stacked and fixed on the box main body, which is convenient for separate arrangement of multiple groups of cables and convenient for routing of the cables. Moreover, the sealing frames and cables in the same group can be laid together, which greatly improves the laying efficiency of the cables and is convenient for dismantling and maintenance at a later stage.

[0018] The utility model uses a box body, a plurality of blocking frames and fireproof mud to form a sealed structure, and the current transformer located outside the cable can be isolated from the outside world, so that it has a very long service life. The current transformer outside the cable is connected to the leakage detection device of the power supply system, which can better detect the leakage of the cable.

[0019] The utility model not only has the fire prevention effect, but also has the leakage detection function. The current transformer is sealed in the box, and the service life and detection effect are also better.

[0020] The utility model can be installed without disconnecting the cables to ensure normal power transmission operation. The corresponding installation groove can be opened in the cable trench. The box body is first put in, and then the lower frame, cables and upper frame are put in the box body in turn. The interface completes the installation of one group of cables, and the installation of multiple groups of cables is completed from bottom to top in turn. Finally, fireproof mud is filled in the box body, and the box cover is closed to complete the installation of the fireproof blocking device. The installation is simple and efficient.

[0021] The utility model provides a cable trench fire prevention device with a leakage detection function, which adopts a modular structure of a plurality of stacked sealing frames and is directly assembled and placed on the construction site, thereby simplifying the construction process and improving the construction efficiency. A plurality of cable holes are provided on a plurality of groups of sealing frames, and the cable holes are equipped with plugs, so that the number of plugs and wire threading tubes can be flexibly selected according to the number of cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a schematic diagram of a part of the structure of the utility model in a top view;

[0024] Figure 3 It is a schematic diagram of a part of the structure of the utility model when looking upward;

[0025] Figure 4 This is a schematic diagram of the structure of the utility model after the box cover is opened;

[0026] Figure 5 It is a structural schematic diagram of the box body;

[0027] Figure 6 It is a structural schematic diagram of the blocking frame;

[0028] Figure 7 This is a schematic diagram of the installation of the utility model;

[0029] The symbols of the components are as follows:

[0030] 1. Box body; 11. Extension part; 2. Sealing frame; 21. Upper frame; 22. Lower frame; 23. Cable hole; 24. Limit block; 3. Box cover; 31. Hinge opening; 32. Installation opening; 33. Hinge part; 34. Handle; 35. Display screen; 4. Rotating shaft; 5. Plug; 51. Cable hole; 52. Circular limit part; 6. Fastening screw; 7. Cable groove; 8. Installation slot; 9. Cable line; 10. Current transformer. DETAILED DESCRIPTION

[0031] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0032] like Figure 1 , 2 As shown in , 3, 4 and 5, the cable trench fire prevention device with leakage detection function is used in conjunction with the cable line 9. The cable trench fire prevention device with leakage detection function includes a U-shaped box body 1 and a plurality of stacked blocking frames 2. The plurality of blocking frames 2 are fixed in the box body 1. The plurality of blocking frames 2 and the box body 1 form a box body, and the box body is used to fill fireproof mud; it can also be filled with fireproof foaming materials, such as polyurethane spray coating B1 fire-retardant rigid foaming AB material. The bottom of the front and rear sides of the box body 1 are both provided with extensions 11, and the length of the extension 11 is equal to the width of the blocking frame 2. The extension 11 is conducive to the box body 1 and the blocking frame 2 to form a box structure with better sealing.

[0033] Each set of blocking frames 2 is provided with a plurality of cable holes 23 for installing cables 9. A current transformer 10 is provided outside each cable 9 in the box body 1. The current transformer 10 can be an open-type current transformer AKH-0.66 / K. A plug 5 is provided in each cable hole 23. A box cover 3 is provided on the top of one side of the box body 1. The box body 1 is hinged to one end of the box cover 3, and the other end of the box cover 3 is fixedly connected to the other side of the box body 1.

[0034] like Figure 6 As shown, the blocking frame 2 includes an upper frame 21 and a lower frame 22 of the same structure, and each cable hole 23 is evenly separated and arranged on the upper frame 21 and the lower frame 22. The blocking frame 2 adopts the combination of the upper frame 21 and the lower frame 22, and the upper frame 21 is stacked on the lower frame 22, so that the cable is conveniently installed in the cable hole 23. The left and right sides of the upper frame 21 and the lower frame 22 are respectively provided with limit blocks 24 that cooperate with the box body 1, and the two limit blocks 24 on the left side are engaged with the left side of the box body 1, and the two limit blocks 24 on the right side are engaged with the right side of the box body 1. The upper frame 21 and the lower frame 22 form a clamping part through the limit blocks 24, which is convenient for stacking the upper frame 21 and the lower frame 22 in sequence. At the same time, the limit blocks 24 at four places cooperate, which has a certain limit effect, which greatly facilitates the stacking of the upper frame 21 and the lower frame 22 in sequence.

[0035] The hinged end of the box cover 3 is provided with a hinged opening 31, and the movable end of the box cover 3 is provided with an installation opening 32. The hinged opening 31 and the installation opening 32 are matched with the top of the box body 1. Two rotating shafts 4 are provided on the hinged side of the box body 1, and two hinged parts 33 are provided on the hinged end of the box cover 3. The hinged parts 33 are provided with through holes for installing the rotating shafts 4, and the rotating shafts 4 are threadedly connected to the box body 1. The box cover 3 is hinged to the box body 1 through the rotating shafts 4, so that the box cover 3 can be folded outward, which is convenient for the wiring installation of the cable. At the same time, after the box cover 3 is folded, it can be connected to the box body 1 through a bayonet or screws, and the connection is more efficient.

[0036] The movable end of the box cover 3 is connected to the box body 1 by screws or locks. The box cover 3 is connected by screws, and a corresponding countersunk hole is set on the box body 1, and a threaded hole is set on the movable end of the box cover 3. This method is stable and has lower cost. The box cover 3 is connected to the box body 1 by a lock, and the movable part and the fixed part of the lock are fixed on the box cover 3 and the box body 1 respectively. The lock can be preferably a 304 stainless steel spring buckle.

[0037] A U-shaped handle 34 is provided on the top of the box cover 3, and the handle 34 is fixed to the box cover 3 by a plurality of screws. The handle 34 can be conveniently folded over the box cover 3, so as to facilitate the opening and closing of the box cover 3.

[0038] A plug 5 is provided in each cable hole 23, and the plug 5 includes a circular limiting portion 52 and a cable hole portion 51 matched with the cable hole 23, the cable hole portion 51 and the circular limiting portion 52 are designed as one body, and the cable hole portion 51 and the cable hole 23 are overfitted or interference fit, so that the plug 5 is fixed in the cable hole 23. The plug 5 is made of rubber or plastic.

[0039] The box body 1, the sealing frame 2 and the box cover 3 are all made of glass magnesium board. The glass magnesium board has the advantages of high temperature resistance and good corrosion resistance, high strength, and is suitable for fire protection of cables.

[0040] A display screen is provided on the box cover 3, so as to conveniently observe the leakage situation during operation by using the display screen.

[0041] Working process and principle: Figure 7As shown, before use, an installation groove is set in the cable trench 7, and the box body 1 is placed in the cable trench 7. First, place the lower frame 22 of the lowest layer on the box body 1, then put the cable in the cable hole 23 of the lower frame 22, install the current transformer 10 outside the cable, and connect the current transformer 10 to the leakage detection equipment of the power supply system, and then fix the upper frame 21 on the lower frame 22 and the cable, repeat the above steps of installing the blocking frame 2 and the cable, install the second group of blocking frames 2 and cables above, until multiple groups of blocking frames 2 and cables are completed. After all the blocking frames 2 and cables are installed, fill the gap between the cable and the box body 1 with fireproof mud, and finally flip the box cover 3 to a horizontal position, so that the movable end of the box cover 3 is clamped on the right side of the box body 1, and it can be fixed by screws or locks to achieve the installation of the blocking device. The entire construction process is faster and more convenient, threading is easier, and the sealing effect is good. If there are extra cable holes 23, the cable holes 23 can be blocked from the inside to the outside with the built-in plug 5 to meet actual usage requirements.

Claims

1. A cable trench fire prevention device with leakage detection function, used in conjunction with a cable line (9), characterized in that: The invention comprises a U-shaped box body (1) and a plurality of groups of stacked blocking frames (2), wherein the plurality of groups of blocking frames (2) are fixed in the box body (1), and the plurality of groups of blocking frames (2) and the box body (1) form a box body, wherein the box body is filled with fireproof mud; each group of the blocking frames (2) is provided with a plurality of cable holes (23) for installing cables (9), and a current transformer (10) is provided outside each cable (9) located in the box body (1); a box cover (3) is provided at the top of one side of the box body (1), the box body (1) is hinged to one end of the box cover (3), and the other end of the box cover (3) is fixedly connected to the other side of the box body (1).

2. The cable trench fire prevention device with leakage detection function according to claim 1 is characterized in that: The blocking frame (2) comprises an upper frame body (21) and a lower frame body (22) of the same structure, and each of the cable holes (23) is evenly spaced and arranged on the upper frame body (21) and the lower frame body (22).

3. The cable trench fire prevention device with leakage detection function according to claim 2 is characterized in that: The left and right sides of the upper frame (21) and the lower frame (22) are respectively provided with limit blocks (24) that cooperate with the box body (1); the two limit blocks (24) on the left side are snap-fitted with the left side of the box body (1), and the two limit blocks (24) on the right side are snap-fitted with the right side of the box body (1).

4. The cable trench fire prevention device with leakage detection function according to claim 1 is characterized in that: The hinged end of the box cover (3) is provided with a hinged opening (31), and the movable end of the box cover (3) is provided with a mounting opening (32), and the hinged opening (31) and the mounting opening (32) are matched with the top of the box body (1).

5. The cable trench fire prevention device with leakage detection function according to claim 1 is characterized in that: Two rotating shafts (4) are arranged on the hinged side of the box body (1), and two hinged parts (33) are arranged on the hinged end of the box cover (3). Through holes for installing the rotating shafts (4) are arranged on the hinged parts (33), and the rotating shafts (4) are threadedly connected to the box body (1).

6. The cable trench fire prevention device with leakage detection function according to claim 1 is characterized in that: The movable end of the box cover (3) is connected to the box body (1) via screws or locks.

7. The cable trench fire prevention device with leakage detection function according to claim 1 is characterized in that: A U-shaped handle (34) is provided on the top of the box cover (3), and the handle (34) is fixed to the box cover (3) by a plurality of screws.

8. The cable trench fire prevention device with leakage detection function according to claim 1 is characterized in that: A plug (5) is provided in each of the cable holes (23), wherein the plug (5) comprises a circular limiting portion (52) and a cable hole portion (51) matched with the cable hole (23), and the cable hole portion (51) and the circular limiting portion (52) are designed as an integral whole.

9. The cable trench fire prevention device with leakage detection function according to claim 1, characterized in that: The box body (1), the sealing frame (2) and the box cover (3) are all made of glass magnesium plates.

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