Flame-retardant cable branch box for building construction

Abstract

The utility model discloses a flame-retardant cable branch box for building construction, which comprises a box body, ceramic flame-retardant sheets are arranged on the inner walls of the box body, a top cover is arranged at the top end of the box body, a flame-retardant box is connected to one surface, facing the inner side of the box body, of the top cover, flame retardants are stored in the flame-retardant box, a plurality of openings are formed in the bottom end of the flame-retardant box, and the openings are communicated with the flame-retardant box. A hot melting composite material is arranged on the inner side of the opening; a plurality of cooling fans are installed on the back face of the box body. According to the utility model, the top cover is arranged at the top end of the box body, the flame-retardant box is arranged at the bottom of the top cover, the flame retardant is arranged in the flame-retardant box, and the plurality of openings blocked by the hot-melt composite material are arranged at the bottom of the flame-retardant box, so that the hot-melt composite material is melted after the interior of the cable branch box is on fire, and the flame retardant in the flame-retardant box leaks out; in this way, the inside of the cable branch box can be extinguished. And meanwhile, the ceramic flame-retardant sheets are arranged on the inner wall of the box body, so that the flame-retardant effect of the box body can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable branch box technical field, concretely is a kind of flame-retardant cable branch box for building construction. BACKGROUND

[0002] In the process of building construction, cable branch box plays a very important role, it is used to distribute and connect cable, guarantee the power supply of construction site. Construction site is usually more complex, there are a large number of flammable building materials, temporary wooden structure and various fire operations, such as welding, cutting, which makes the risk of fire higher. Once fire occurs, the traditional cable branch box is easily ignited due to its shell and internal components do not have good flame-retardant performance, and then cause more serious fire accidents, not only will cause power interruption of construction site, affect construction progress, also can threaten the life safety of construction personnel, lead to major casualties and property losses. Therefore, some flame-retardant cable branch boxes appear on the market.

[0003] For example, the Chinese patent with publication number CN207426606U discloses a flame-retardant cable branch box for building construction, comprising a cable branch box body, the box shell of the cable branch box body is a flame-retardant shell, the flame-retardant shell includes an inner shell and an outer shell, the inner shell and the outer shell are made of stainless steel plate, a flame-retardant layer is arranged between the inner shell and the outer shell, the outer surface of the inner shell is fixedly connected with the inner surface of the flame-retardant layer, and the inner surface of the outer shell is also fixedly connected with the outer surface of the flame-retardant layer. The flame-retardant layer includes a first inorganic flame-retardant material layer and a second inorganic flame-retardant material layer. The flame-retardant cable branch box for building construction greatly improves the flame-retardant performance of the box shell of the cable branch box body, has high safety, and is beneficial to popularization and use.

[0004] The flame-retardant cable branch box provided by the above patent mainly relies on the internal flame-retardant layer to achieve the flame-retardant effect. However, the flame-retardant cable branch box does not have a structure for flame-retardant fire extinguishing, and cannot extinguish the fire in the cable branch box when the cable branch box is on fire. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a flame-retardant cable branch box for building construction, and aims at improving the problem that the existing flame-retardant cable branch box does not have a structure for flame-retardant fire extinguishing, and cannot extinguish the fire in the cable branch box when the cable branch box is on fire.

[0006] The utility model is implemented as follows:

[0007] The utility model provides a kind of fire -retardant cable branch box for building construction, including box, ceramic fire -retardant sheet is equipped on the inner wall of the box, the top of the box is equipped with top cover, the side of top cover towards the inside of box is connected with fire -retardant box, fire -retardant agent is stored in the fire -retardant box, and the bottom of the fire -retardant box is equipped with multiple openings, and hot melt composite material is equipped in the inside of opening;The back of the box is equipped with multiple heat dissipation fans.

[0008] Preferably, the top of the box is equipped with a ring, and the bottom of the two sides of the box is equipped with a heat dissipation hole;The bottom of the box is equipped with a bottom plate, and the bottom plate is equipped with multiple bottom holes, the front of the box is hinged with a door, and the side of the door not hinged with the box is equipped with a pull slot;The back of the box is equipped with a threaded hole near the top, and the back of the box is equipped with a wire inlet at the bottom.

[0009] Preferably, the bottom of the top cover is equipped with a sleeve ring, the sleeve ring is sleeved on the ring, and the side of the sleeve ring is aligned with the position of the ring.

[0010] Preferably, the top of the two sides of the fire -retardant box is equipped with a fixed plate, the fixed plate is equipped with multiple fixing holes, the bottom of the fire -retardant box is equipped with a feeding port, and the feeding port is threadedly connected with a cover.

[0011] Preferably, the end of the heat dissipation fan towards the threaded hole is equipped with an adapter ring, the adapter ring is threadedly connected with the threaded hole, the heat dissipation fan is connected with a communication line, and the end of the communication line is equipped with a communication plug for connecting electricity to make the heat dissipation fan work.

[0012] Preferably, it further includes a support seat, the support seat includes a top frame, a bottom frame and a damping shock absorber, the top frame and the bottom frame are connected by a plurality of damping shock absorbers, the top frame is equipped with a plurality of connecting grooves, and the bottom frame is equipped with a plurality of bolt holes, and the top frame and the box are fixed by bolts.

[0013] Preferably, it further includes a wire binding plate, the wire binding plate is fixed in the inside of the box by bolts, and the upper surface of the wire binding plate is uniformly equipped with a plurality of buckles, the bottom of the two sides of the wire binding plate is equipped with a mounting foot, and the mounting foot is equipped with a plurality of mounting holes.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] 1、The top of the box is equipped with a top cover, the bottom of the top cover is equipped with a fire -retardant box, the inside of the fire -retardant box is equipped with a fire -retardant agent, the bottom of the fire -retardant box is equipped with multiple openings blocked by hot melt composite material, the hot melt composite material is melted when the cable branch box inside is on fire, and the fire -retardant agent in the fire -retardant box leaks out at this time, which can play a role in extinguishing the fire inside the cable branch box;The inner wall of the box is also equipped with ceramic fire -retardant sheet, which can improve the fire -retardant effect of the box.

[0016] 2. The utility model discloses a support seat is installed at the bottom of the box, and the support seat can play a certain damping effect to the cable branch box, and can play the buffering effect when the cable branch box is bumped in the construction site.

[0017] 3. The utility model discloses a bundling plate is set up to bundle the cable that enters the inside of the box, guarantees the cable neat inside the cable branch box. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structural schematic diagram of the utility model whole in the rear end oblique perspective under;

[0019] Figure 2 It is the structural schematic diagram of the utility model whole in the front end oblique perspective under;

[0020] Figure 3 It is the structural schematic diagram of the utility model box in the front end oblique perspective under;

[0021] Figure 4 It is the structural schematic diagram of the utility model box in the rear end oblique perspective under;

[0022] Figure 5 It is the structural schematic diagram of the utility model top cover;

[0023] Figure 6 It is the structural schematic diagram of the utility model flame -retardant box;

[0024] Figure 7 It is the structural schematic diagram of the utility model heat dissipation fan;

[0025] Figure 8 It is the structural schematic diagram of the utility model support seat;

[0026] Figure 9 It is the structural schematic diagram of the utility model bundling plate.

[0027] In the drawing: 1, box;11, insert ring;12, heat dissipation hole;13, bottom plate;14, bottom hole;15, box door;16, draw slot;17, screw hole;18, wire inlet;19, ceramic flame -retardant sheet;2, top cover;21, sleeve ring;22, top screw;3, flame -retardant box;31, fixed plate;32, fixed hole;33, hot melt composite material;34, feed inlet;35, cover;4, heat dissipation fan;41, adapter ring;42, communication line;43, communication plug;5, support seat;51, top frame;511, connecting groove;52, damper shock absorber;53, bottom frame;531, bolt hole;6, bundling plate;61, buckle;62, mounting foot;63, mounting hole. DETAILED DESCRIPTION

[0028] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two element internal communication or two element mutual action relationship.For ordinary skilled person in the art, the above terms can be understood according to the specific meaning in the utility model.

[0029] The following further description is made in conjunction with the drawings and specific embodiments:

[0030] Example 1

[0031] As Figure 1 , Figure 2 and Figure 3 shown, a kind of flame-retardant cable branch box for building construction, including box 1, ceramic flame-retardant sheet 19 is equipped on the inner wall of box 1, flame-retardant sheet is convenient to increase the flame-retardant ability of entire box 1. Box 1 top end is equipped with top cover 2, top cover 2 is convenient to the opening of box 1 top end plugging. The side of top cover 2 towards the inside of box 1 is connected with flame-retardant box 3, flame-retardant box 3 stores flame retardant, and flame-retardant box 3 cooperates flame retardant is convenient when the fire in the inside of box 1 can be extinguished in the inside of box 1. And flame-retardant box 3 bottom end is equipped with multiple openings, and the inside of opening is equipped with hot melt composite material 33;This way is convenient after hot melt composite material 33 is melted in the inside of box 1, the flame retardant in the inside of flame-retardant box 3 can leak out, and the fire in the inside of box 1 is extinguished. Box 1 back is equipped with multiple cooling fans 4, and cooling fan 4 is convenient for the heat generated in the inside of box 1 to discharge.

[0032] As Figure 3 and Figure 4 shown, box 1 top end is equipped with insert ring 11, and insert ring 11 is convenient for detachable connection between box 1 and top cover 2. And the bottom of both sides of box 1 is equipped with heat dissipation hole 12, and heat dissipation hole 12 is convenient for cooperating with cooling fan 4, and the heat generated in the box 1 is quickly discharged;Box 1 bottom end is equipped with bottom plate 13, and bottom plate 13 is equipped with multiple bottom holes 14, and the cooperation of bottom plate 13 and bottom hole 14 is convenient for fixing the position of box 1 by bolt. Box 1 front opening is hinged with box door 15, and the side of box door 15 not hinged with box 1 is equipped with pull slot 16;Box door 15 is convenient for opening box 1, and pull slot 16 is convenient for pulling open box door 15. Box 1 back is equipped with threaded hole 17 near the top, and threaded hole 17 is convenient for connecting box 1 with cooling fan 4. Box 1 back bottom is equipped with wire inlet 18, and wire inlet 18 is convenient for cable to enter the inside of box 1.

[0033] As Figure 5As shown, the top cover 2 bottom surface is provided with a sleeve ring 21, the sleeve ring 21 is sleeved on the insert ring 11, the sleeve ring 21 side aligns the position of the insert ring 11 and is provided with a top wire 22, the top wire 22 is convenient to abut on the insert ring 11, thereby ensuring that the top cover 2 is stably installed at the top end of the box body 1.

[0034] As shown in the figure, Figure 6 As shown, the flame-retardant box 3 is provided with a fixing plate 31 at the top end of both sides, the fixing plate 31 is provided with a plurality of fixing holes 32, and the fixing plate 31 and the fixing hole 32 are matched to facilitate the fixation of the flame-retardant box 3 on the top cover 2 by bolts. The bottom surface of the flame-retardant box 3 is provided with a feed port 34, and the feed port 34 is threadedly connected with a cover 35, and the cooperation of the feed port 34 and the cover 35 is convenient for injecting the flame retardant into the inside of the flame-retardant box 3.

[0035] As shown in the figure, Figure 7 As shown, the heat dissipation fan 4 is provided with an adapter ring 41 at one end facing the threaded hole 17, the adapter ring 41 is threadedly connected with the threaded hole 17, facilitating the disassembly and use of the heat dissipation fan 4. The heat dissipation fan 4 is connected with a communication line 42, and the communication line 42 is provided with a communication plug 43 at the end, which is used for power connection to make the heat dissipation fan 4 work, facilitating the heat dissipation fan 4 to quickly dissipate heat inside the box body 1.

[0036] Example 2

[0037] As shown in the figure, Figure 1 , Figure 2 and Figure 3 As shown, a flame-retardant cable branch box for building construction comprises a box body 1, and ceramic flame-retardant sheets 19 are arranged on the inner walls of the box body 1, which are convenient for increasing the flame-retardant capacity of the entire box body 1. The top end of the box body 1 is provided with a top cover 2, which is convenient for plugging the opening at the top end of the box body 1. One side of the top cover 2 facing the inside of the box body 1 is connected with a flame-retardant box 3, the flame-retardant box 3 stores a flame retardant, and the flame-retardant box 3 cooperates with the flame retardant to facilitate the extinguishing of the fire inside the box body 1 when the box body 1 is on fire. The bottom end of the flame-retardant box 3 is provided with a plurality of openings, and hot melt composite material 33 is arranged inside the openings; in this way, the hot melt composite material 33 is melted after the box body 1 is on fire, and the flame retardant in the flame-retardant box 3 can leak out to extinguish the fire inside the box body 1. A plurality of heat dissipation fans 4 are installed on the back of the box body 1, which are convenient for discharging the heat generated inside the box body 1.

[0038] As shown in the figure, Figure 3 and Figure 4As shown, the top end of the box 1 is provided with a ring 11, which is convenient for the detachable connection between the box 1 and the top cover 2. And the bottom of the two sides of the box 1 is provided with a heat dissipation hole 12, which is convenient for cooperating with the heat dissipation fan 4, and the heat generated by the box 1 is quickly discharged; the bottom end of the box 1 is provided with a bottom plate 13, and a plurality of bottom holes 14 are arranged on the bottom plate 13, which is convenient for fixing the position of the box 1 through bolts. The box door 15 is hinged at the opening of the front of the box 1, and the side of the box door 15 not hinged with the box 1 is provided with a pull slot 16; the box door 15 is convenient for opening the box 1, and the pull slot 16 is convenient for pulling open the box door 15. The box 1 is provided with a threaded hole 17 near the top of the back, which is convenient for connecting the box 1 with the heat dissipation fan 4. The back bottom of the box 1 is provided with a wire inlet 18, which is convenient for the cable to enter the inside of the box 1.

[0039] As shown in Figure 5 The bottom surface of the top cover 2 is provided with a sleeve ring 21, which is sleeved on the ring 11, and the side surface of the sleeve ring 21 is aligned with the position of the ring 11. The top wire 22 is provided with a top wire 22, which is convenient for abutting on the ring 11, so as to ensure that the top cover 2 is stably installed at the top end of the box 1.

[0040] As shown in Figure 6 The top end of the fire-resistant box 3 is provided with a fixed plate 31, and a plurality of fixed holes 32 are arranged on the fixed plate 31. The fixed plate 31 and the fixed hole 32 are convenient for fixing the fire-resistant box 3 on the top cover 2 through bolts. The bottom surface of the fire-resistant box 3 is provided with a feeding port 34, and the feeding port 34 is threadedly connected with a cover 35. The feeding port 34 and the cover 35 are convenient for injecting the fire retardant into the inside of the fire-resistant box 3.

[0041] As shown in Figure 7 The end of the heat dissipation fan 4 facing the threaded hole 17 is provided with an adapter ring 41, which is threadedly connected with the threaded hole 17, and is convenient for disassembling and using the heat dissipation fan 4. The heat dissipation fan 4 is connected with a communication line 42, and the end of the communication line 42 is provided with a communication plug 43, which is used for connecting the power supply to make the heat dissipation fan 4 work, and is convenient for the heat dissipation fan 4 to quickly dissipate heat in the inside of the box 1.

[0042] As shown in Figure 1 And Figure 8As shown, it also includes support seat 5, support seat 5 is convenient to support the box 1. Support seat 5 includes top frame 51, bottom frame 53 and damping shock absorber 52, top frame 51 and bottom frame 53 are connected by a plurality of damping shock absorber 52, this structure is convenient for the whole support seat 5 has the effect of damping shock absorber, convenient in the construction site when the object bumps box 1 can be unloaded force buffer. Top frame 51 is provided with a plurality of connecting groove 511, connecting groove 511 is convenient for support seat 5 and bottom plate 13 connected. And the bottom frame 53 is provided with a plurality of bolt hole 531, top frame 51 and box 1 is fixed by bolt connection, bolt hole 531 is convenient for fixing the position of support seat 5.

[0043] Example 3

[0044] As Figure 1 , Figure 2 and Figure 3 shown, a kind of flame-retardant cable branch box for building construction, including box 1, the inner wall of box 1 is equipped with ceramic flame-retardant sheet 19, flame-retardant sheet is convenient to increase the flame-retardant capacity of the whole box 1. Box 1 top is equipped with top cover 2, top cover 2 is convenient to box 1 top end opening plugging. Top cover 2 is connected with flame-retardant box 3 towards the inside of box 1, flame-retardant box 3 stores flame retardant, flame-retardant box 3 cooperates with flame retardant agent is convenient to box 1 inside when fire can extinguish fire in box 1. And flame-retardant box 3 bottom is equipped with a plurality of openings, and the inside of opening is equipped with hot melt composite material 33;This way is convenient in the case of box 1 internal fire hot melt composite material 33 is melted, the flame retardant agent in flame-retardant box 3 can leak out, and the fire in box 1 is extinguished. Box 1 back is equipped with a plurality of cooling fans 4, cooling fan 4 is convenient for the heat generated in box 1 to discharge.

[0045] As Figure 3 and Figure 4 shown, box 1 top is equipped with insert ring 11, insert ring 11 is convenient for box 1 and top cover 2 can be detachably connected. And box 1 both sides bottom is equipped with heat dissipation hole 12, heat dissipation hole 12 is convenient for cooperating with cooling fan 4, convenient for the heat generated in box 1 to discharge quickly;Box 1 bottom is equipped with bottom plate 13, bottom plate 13 is equipped with a plurality of bottom holes 14, and the cooperation of bottom plate 13 and bottom hole 14 is convenient for fixing the position of box 1 by bolt. Box 1 front opening is hinged with box door 15, and the side of box door 15 not hinged with box 1 is equipped with pull slot 16;Box door 15 is convenient for opening box 1, and pull slot 16 is convenient for pulling open box door 15. Box 1 back near the top position is equipped with screw hole 17, screw hole 17 is convenient for box 1 and cooling fan 4 connection. Box 1 back bottom is equipped with wire inlet 18, wire inlet 18 is convenient for cable into the box 1 inside.

[0046] As Figure 5As shown, the top cover 2 bottom surface is provided with a sleeve ring 21, the sleeve ring 21 is sleeved on the insert ring 11, the sleeve ring 21 side aligns the position of the insert ring 11 and is provided with a top wire 22, the top wire 22 is convenient to abut on the insert ring 11, thereby ensuring that the top cover 2 is stably installed at the top end of the box body 1.

[0047] As shown, Figure 6 The flame-retardant box 3 is provided with a fixing plate 31 at the top end of both sides, a plurality of fixing holes 32 are arranged on the fixing plate 31, and the fixing plate 31 and the fixing hole 32 are matched to facilitate fixing the flame-retardant box 3 on the top cover 2 by bolts. The bottom surface of the flame-retardant box 3 is provided with a feed port 34, and the feed port 34 is threadedly connected with a cover 35. The cooperation of the feed port 34 and the cover 35 is convenient for injecting the flame retardant into the interior of the flame-retardant box 3.

[0048] As shown, Figure 7 The heat dissipation fan 4 is provided with an adapter ring 41 at one end facing the threaded hole 17, the adapter ring 41 is threadedly connected with the threaded hole 17, facilitating the disassembly and use of the heat dissipation fan 4. The heat dissipation fan 4 is connected with a communication line 42, and the communication line 42 is provided with a communication plug 43 at the end, which is used for power connection to make the heat dissipation fan 4 work, facilitating the heat dissipation fan 4 to quickly dissipate heat in the box body 1.

[0049] As shown, Figure 1 And Figure 8 It also includes a support seat 5, which is convenient for stably supporting the box body 1. The support seat 5 includes a top frame 51, a bottom frame 53 and a damping shock absorber 52, and the top frame 51 and the bottom frame 53 are connected by a plurality of damping shock absorbers 52. This structure is convenient for the entire support seat 5 to have the function of damping and shock absorption, and is convenient for unloading and buffering when an object bumps into the box body 1 in the construction site. A plurality of connecting grooves 511 are arranged on the top frame 51, which are convenient for connecting the support seat 5 with the bottom plate 13. A plurality of bolt holes 531 are arranged on the bottom frame 53, and the top frame 51 and the box body 1 are connected and fixed by bolts. The bolt hole 531 is convenient for fixing the position of the support seat 5.

[0050] As shown, Figure 1 And Figure 9 It also includes a wire binding plate 6, which is fixed on the inside bottom of the box body 1 by bolts, and a plurality of buckles 61 are uniformly arranged on the upper surface of the wire binding plate 6. The wire binding plate 6 cooperates with the buckle 61 to conveniently limit and clamp the cable, ensuring the stable use of the cable. The bottom of both sides of the wire binding plate 6 is provided with a mounting foot 62, and a plurality of mounting holes 63 are arranged on the mounting foot 62. The cooperation of the mounting foot 62 and the mounting hole 63 is convenient for fixing the position of the wire binding plate 6 by bolts.

[0051] Working principle: when using, the cable is inserted into the box 1 through the inlet 18, and the cable is connected with the components in the box 1. When the box 1 is on fire, the ceramic fire-retardant sheet 19 can effectively improve the fire-retardant effect of the box 1, avoid the rapid spread of the fire, and the fire in the box 1 will melt the hot melt composite material 33 at the bottom of the fire-retardant box 3, at this time the fire retardant in the fire-retardant box 3 will leak out from the box 1, so as to achieve the purpose of fire-retardant and fire extinguishing in the box 1. And the support seat 5 can effectively reduce the vibration of the box 1, so that the box 1 can be quickly unloaded and buffered after being knocked. The heat dissipation fan 4 is connected to the power supply, which can quickly discharge the heat generated in the box 1.

[0052] In summary, compared with the prior art, the application is provided with the top cover 2 at the top end of the box 1, the fire-retardant box 3 is installed at the bottom of the top cover 2, the fire-retardant agent is arranged in the fire-retardant box 3, the hot melt composite material 33 is arranged in the opening of the fire-retardant box 3, the hot melt composite material 33 is melted when the cable branch box is on fire, the fire-retardant agent in the fire-retardant box 3 is leaked out, which can play a role in extinguishing the fire in the cable branch box; meanwhile, the ceramic fire-retardant sheet 19 is arranged on the inner wall of the box 1, which can improve the fire-retardant effect of the box 1.

[0053] The above is only the preferred embodiment of the application, and is not used to limit the application. For those skilled in the art, the application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A fire resistant cable distribution box for building construction comprising a box (1), characterised in that, The inner wall of the box (1) is provided with ceramic flame-retardant sheet (19), the top of the box (1) is provided with a top cover (2), the inner side of the top cover (2) is connected with a flame-retardant box (3), the flame-retardant box (3) stores flame retardant, and the bottom of the flame-retardant box (3) is provided with a plurality of openings, and the inner side of the opening is provided with a hot melt composite material (33); The back of the box (1) is provided with a plurality of cooling fans (4); It also includes a support seat (5), the support seat (5) includes a top frame (51), a bottom frame (53) and a damping shock absorber (52), the top frame (51) and the bottom frame (53) are connected by a plurality of damping shock absorbers (52), a plurality of connecting grooves (511) are formed in the top frame (51), and a plurality of bolt holes (531) are formed in the bottom frame (53), the top frame (51) and the box (1) are connected and fixed by bolts; It also includes a cable tie plate (6), the cable tie plate (6) is fixed on the inner bottom of the box (1) by bolts, and a plurality of buckles (61) are uniformly arranged on the upper surface of the cable tie plate (6), the bottom of the cable tie plate (6) is provided with mounting feet (62), and a plurality of mounting holes (63) are formed in the mounting feet (62).

2. The flame-retardant cable branch box for building construction according to claim 1, characterized in that, The top of the box (1) is provided with an insertion ring (11), and the bottom of the box (1) is provided with a heat dissipation hole (12); The bottom of the box (1) is provided with a bottom plate (13), a plurality of bottom holes (14) are formed in the bottom plate (13), a box door (15) is hinged to the opening of the front of the box (1), and a pull groove (16) is formed in the side of the box door (15) which is not hinged to the box (1); The back of the box (1) is provided with a threaded hole (17) near the top, and the back of the box (1) is provided with a wire inlet (18).

3. The flame-retardant cable branch box for building construction according to claim 2, characterized in that, The bottom surface of the top cover (2) is provided with a sleeve ring (21), the sleeve ring (21) is sleeved on the insertion ring (11), and the side surface of the sleeve ring (21) is provided with a top wire (22) aligned with the insertion ring (11).

4. The flame-retardant cable branch box for building construction according to claim 1, characterized in that, The top of the flame-retardant box (3) is provided with a fixed plate (31), a plurality of fixing holes (32) are formed in the fixed plate (31), and the bottom of the flame-retardant box (3) is provided with a feeding port (34), and the feeding port (34) is threadedly connected with a cover (35).

5. The flame-retardant cable branch box for building construction according to claim 2, characterized in that, The end of the cooling fan (4) facing the threaded hole (17) is provided with an adapter ring (41), the adapter ring (41) is threadedly connected with the threaded hole (17), the cooling fan (4) is connected with a communication line (42), and the end of the communication line (42) is provided with a communication plug (43) for connecting electricity to make the cooling fan (4) work.

Images