An assembled fire wall for power cable trench

Abstract

The present invention belongs to the field of cables, and in particular relates to an assembled fire wall for power cable trenches, which has a bracket, characterized in that the bracket is composed of a bracket body, the bracket body is U-shaped, and a vertical slot is formed in the middle of the left and right side walls of the bracket body, a flame retardant partition assembly is inserted into the slot, and an upper prefabricated panel and a lower prefabricated panel are embedded in the flame retardant partition assembly, the upper prefabricated panel is composed of an upper prefabricated panel body, and at least one arc-shaped opening is formed on the lower edge of the upper prefabricated panel body, the lower prefabricated panel is composed of a lower prefabricated panel body, and an arc-shaped opening corresponding to the arc-shaped opening of the upper prefabricated panel body is formed on the upper edge of the lower prefabricated panel body, and the two corresponding arc-shaped openings can be assembled into a cable hole, a cable is placed in the cable hole, and the cable is placed on a corresponding cable shelf; the present invention has the advantages of simple structure, detachability, cable holes that can be used to install cables of different outer diameters, and convenient sealing of cable holes.

Description

Technical Field

[0001] The invention belongs to the field of electric power construction equipment, and in particular relates to an assembled fire wall for a power cable trench. Background Art

[0002] In recent years, the State Grid Corporation of China has put forward higher requirements on the technology and convenience of equipment installation in substations.

[0003] In the design and installation of domestic substation cable trench firewalls, the firewalls are typically installed in one piece. A common structure involves leaving a 400mm gap between the entrance and exit of the high-voltage chamber and at the intersection of the cable trench. One side is sealed with ordinary insulating fireproof panels, and fireproof bricks are then piled up from the bottom of the trench. Where cables are encountered, they are cut and spliced, and then covered with another layer of fireproof panels for compaction. When a substation needs to be expanded or renovated, requiring the addition or replacement of cables, this firewall must be completely removed, and the modified cable layout installed. This increases work time and wastes a significant amount of material.

[0004] For example, in the prior art, CN203312742U discloses a detachable cable trench fire wall, which includes a surface layer, a standard layer, a bottom layer and channel steel fixed on the cable trench wall. Each layer of the fire wall is provided with a plurality of semicircular holes for laying cables on the upper and lower sides, and a plurality of rainwater holes are provided on the lower part of the bottom layer.

[0005] The above-mentioned prior art has the following technical drawbacks: fire can still escape from the cable holes where no cables are installed, thereby failing to effectively prevent the cables from burning. Summary of the Invention

[0006] In order to solve the above problems, the purpose of the present invention is to disclose an assembled fire wall for a power cable trench, which is achieved by adopting the following technical solutions.

[0007] A prefabricated fire wall for a power cable trench has a bracket, characterized in that the bracket is composed of a bracket body, the bracket body is U-shaped, and a vertical slot is formed in the middle of the left and right side walls of the bracket body, a flame-retardant partition assembly is inserted into the slot, and the upper prefabricated panel and the lower prefabricated panel are embedded in the flame-retardant partition assembly, the upper prefabricated panel is composed of the upper prefabricated panel body, and at least one arc-shaped opening is formed on the lower edge of the upper prefabricated panel body, and the lower prefabricated panel is composed of the lower prefabricated panel body, and an arc-shaped opening corresponding to the arc-shaped opening of the upper prefabricated panel body is formed on the upper edge of the lower prefabricated panel body, and the two corresponding arc-shaped openings can be assembled into a cable hole, and the cable is placed in the cable hole.

[0008] A power cable trench assembled fire wall, with a bracket, characterized in that the bracket is composed of a bracket body, the bracket body is U-shaped, and a vertical slot is formed in the middle of the left and right side walls of the bracket body, a flame retardant baffle assembly is inserted into the slot, and the flame retardant baffle assembly is embedded in the upper prefabricated plate and the lower prefabricated plate, the upper prefabricated plate is composed of the upper prefabricated plate body, and the lower edge of the upper prefabricated plate body forms at least one first impeller cavity, an impeller is provided in the first impeller cavity, the impeller is composed of at least one first blade with an arc-shaped opening on the rotating shaft, and the same number of second blades as the first blade, the first blade and the corresponding second blade are axially symmetrically fixed to the side wall of the rotating shaft, the impeller can rotate around the rotating shaft, and the impeller side wall and the first impeller cavity are axially symmetrical. The side wall has static friction, and the lower prefabricated plate is composed of a lower prefabricated plate main body. The upper edge of the lower prefabricated plate main body forms a second impeller cavity corresponding to the first impeller cavity of the upper prefabricated plate main body. An impeller is provided in the second impeller cavity. The impeller side wall and the second impeller cavity side wall have static friction. The arc-shaped opening of the first blade of the impeller in the first impeller cavity and the arc-shaped opening of the first blade corresponding to the impeller in the second impeller cavity have the same inner diameter and can be assembled into a cable hole. The inner diameters of the arc-shaped openings of each first blade on the same impeller are different. When any one of the first blades or the second blades of the upper and lower impellers are aligned, the sum of the heights of the two blades and the rotating shaft is the same as the sum of the heights of the first impeller cavity and the second impeller cavity.

[0009] The above-mentioned assembled fire wall for power cable trench is characterized in that a first group of partition plates cavities are formed above the arc-shaped opening of the upper prefabricated plate body and are communicated with the side walls of the arc-shaped opening, and the side walls of the first group of partition plates cavities form an elongated hole with the same length direction as the first group of partition plates cavities. A blocking plate is provided in the first group of partition plates cavities, and a shift rod is provided on the blocking plate. The shift rod is located in the elongated hole and protrudes from the elongated hole. A second blocking plate cavity is formed below the arc-shaped opening of the lower prefabricated plate body and is communicated with the side walls of the arc-shaped opening. When the shift rod is shifted to the bottom of the elongated hole, the blocking plate is inserted into the second blocking plate cavity and completely covers the corresponding two arc-shaped openings.

[0010] The above-mentioned assembled fire wall of power cable trench is characterized in that the flame retardant partition assembly is composed of a lower flame retardant partition, a middle flame retardant partition and an upper flame retardant partition from bottom to top. The lower flame retardant partition is composed of a lower flame retardant partition body and a second upper protrusion located in the middle above the lower flame retardant partition body, and a second upper concave groove is formed on both sides of the second upper protrusion. The middle flame retardant partition is composed of a middle flame retardant partition body, a first upper protrusion located above the middle of the middle flame retardant partition body and a second lower protrusion below the middle of the middle flame retardant partition body, and a first upper protrusion is formed on both sides of the first upper protrusion. An upper concave groove, a second lower concave groove is formed on each side of the second lower protrusion, the upper flame retardant partition is composed of an upper flame retardant partition body and a first lower protrusion located in the middle below the upper flame retardant partition body, a first lower concave groove is formed on each side of the first lower protrusion, the upper prefabricated plate and the lower prefabricated plate are located in the space formed by the first lower concave groove and the first upper concave groove, and in the space formed by the second lower concave portion and the second upper concave portion, the upper edge of the upper prefabricated plate body forms a first embedded groove along the length direction of the upper edge, and the left edge of the upper prefabricated plate body forms a second embedded groove along the length direction of the left edge The first embedded strip is embedded in the right edge of the upper prefabricated plate body along the length direction of the right edge, the lower edge of the lower prefabricated plate body forms a third embedded slot along the length direction of the lower edge, the left edge of the lower prefabricated plate body forms a fourth embedded slot along the length direction of the left edge, and the right edge of the lower prefabricated plate body is provided with a second embedded strip along the length direction of the right edge. In the space formed by the first lower concave groove and the first upper concave groove, the first embedded slot is embedded in the corresponding lower edge of the upper flame retardant partition body, the second embedded slot is embedded in the corresponding side edge of the first lower protrusion, and the first embedded strip is embedded in the corresponding slot The third embedding groove is embedded in the upper edge corresponding to the middle flame retardant partition body, the fourth embedding groove is embedded in the side edge corresponding to the first upper protrusion, the second embedding strip is embedded in the corresponding slot, and in the space formed by the second lower recess and the second upper recess, the first embedding groove is embedded in the lower edge corresponding to the middle flame retardant partition body, the second embedding groove is embedded in the side edge corresponding to the second lower protrusion, the first embedding strip is embedded in the corresponding slot, the third embedding groove is embedded in the upper edge corresponding to the lower flame retardant partition body, the fourth embedding groove is embedded in the side edge corresponding to the second upper recess, and the second embedding strip is embedded in the corresponding slot.

[0011] The above-mentioned assembled fire wall for the power cable trench is characterized in that observation holes are formed on the side walls of the bracket body on both sides of the slot.

[0012] The above-mentioned assembled fire wall for power cable trench is characterized in that cable shelves are provided on the front and rear sides of the bracket body.

[0013] The present invention has the following beneficial effects:

[0014] 1. The flame retardant partitions and prefabricated panels are spliced ​​together, which is easy to install. Some accessories can be replaced at will. When expanding the cable capacity, there is no need to dismantle the entire firewall, which can save a lot of construction time and materials and save costs.

[0015] 2. The redundant cable holes are directly blocked with the blocking plate, which is convenient and quick. There is no need to replace the prefabricated plates with different numbers of cable holes. Moreover, the blocking plate is integrated with the upper prefabricated plate, and no other blocking components are required.

[0016] 3. An impeller is set up. By rotating the impeller, cable holes with different inner holes can be formed, which is convenient for passing cables with different apertures. The remaining unused cable holes are blocked by the second blade without an arc-shaped opening. It is quick and convenient, and the prefabricated plate is integrated with the impeller, and no other blocking components are required. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of Example 1 of the present invention.

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the bracket in Example 1 of the present invention.

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure after wiring of Example 1 of the present invention.

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the upper flame-retardant partition in Example 1 of the present invention.

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the middle flame-retardant partition in Example 1 of the present invention.

[0022] Figure 6 This is a schematic diagram of the three-dimensional structure of the lower flame-retardant partition in Example 1 of the present invention.

[0023] Figure 7 This is a schematic diagram of the three-dimensional structure of the prefabricated panel in Example 1 of the present invention.

[0024] Figure 8 This is a schematic diagram of the three-dimensional structure of the prefabricated panel according to Example 1 of the present invention.

[0025] Figure 9 This is a schematic diagram of the three-dimensional structure of the upper prefabricated panel in Example 2 of the present invention.

[0026] Figure 10 This is a cross-sectional view of the upper prefabricated panel in Example 2 of the present invention.

[0027] Figure 11 This is a schematic diagram of the three-dimensional structure of the prefabricated panel in Example 2 of the present invention.

[0028] Figure 12 This is a schematic diagram of the three-dimensional structure of the upper prefabricated panel in Example 3 of the present invention.

[0029] Figure 13 This is a schematic diagram of the three-dimensional structure of the prefabricated panel in Example 3 of the present invention.

[0030] Figure 14 This is a schematic diagram of the three-dimensional structure of the impeller in Example 3 of the present invention.

[0031] In the figure: 1. Bracket, 11. Bracket body, 12. Observation hole, 13. Slot, 14. Cable shelf, 2. Upper flame-retardant baffle, 21. First lower protrusion, 22. First lower recess, 23. Upper flame-retardant baffle body, 3. Upper prefabricated panel, 31. Upper prefabricated panel body, 32. First embedded slot, 33. First embedded strip, 34. Second embedded slot, 36. Long hole, 37. Push rod, 38. Blocking plate, 39. First set of baffle chambers, 310. First impeller chamber, 4. Lower prefabricated panel, 41. Lower prefabricated panel body, 42. Third embedded slot , 43. Second embedded strip, 44. Fourth embedded groove, 45. Arc-shaped mouth, 46. Second baffle cavity, 47. Impeller, 48. Second impeller cavity, 471. First blade, 472. Second blade, 47. Rotating shaft, 5. Middle flame-retardant partition, 51. First upper protrusion, 52. First upper recessed groove, 53. Middle flame-retardant partition body, 54. Second lower recessed groove, 55. Second lower protrusion, 6. Optical cable hole, 7. Lower flame-retardant partition, 71. Second upper protrusion, 72. Second upper recessed groove, 73. Lower flame-retardant partition body, 8. Cable. DETAILED DESCRIPTION

[0032] Example 1: See Figures 1 to 8, an assembled fire wall for power cable trench, having a bracket 1, characterized in that the bracket 1 is composed of a bracket body 11, the bracket body 11 is U-shaped, a vertical slot 13 is formed in the middle of the left and right side walls of the bracket body 11, and the side walls of the bracket body 11 on both sides of the slot 13 form an observation hole 12, and a cable shelf 14 is provided on the front and back sides of the bracket body 11, and the lower flame retardant partition 7, the middle flame retardant partition 5 and the upper flame retardant partition 2 are inserted into the slot 13 from bottom to top respectively, the lower flame retardant partition 7 is composed of a lower flame retardant partition body 73 and a second upper protrusion 71 located in the middle above the lower flame retardant partition body 73, a second upper concave groove 72 is formed on each side of the second upper protrusion 71, and the middle flame retardant partition 5 is composed of a middle flame retardant partition body 53, the first upper protrusion 51 located above the middle of the middle flame retardant partition body 53 and the second lower protrusion 55 below the middle of the middle flame retardant partition body 53 are composed of a first upper concave groove 52 formed on both sides of the first upper protrusion 51, and a second lower concave groove 54 formed on both sides of the second lower protrusion 55. The upper flame retardant partition 2 is composed of an upper flame retardant partition body 23 and a first lower protrusion 21 located in the middle below the upper flame retardant partition body 23. A first lower concave groove 22 is formed on both sides of the first lower protrusion 21. The space formed by the first lower concave groove 22 and the first upper concave groove 52, and the space formed by the second lower concave groove 54 and the second upper concave groove 72 are provided with an upper prefabricated plate 3 and a lower prefabricated plate 4. The upper prefabricated plate 3 is composed of an upper The prefabricated panel body 31 is composed of a first embedded groove 32 formed on the upper edge of the upper prefabricated panel body 31 along the length direction of the upper edge, a second embedded groove 34 formed on the left edge of the upper prefabricated panel body 31 along the length direction of the left edge, and a first embedded strip 33 is provided on the right edge of the upper prefabricated panel body 31 along the length direction of the right edge. The lower edge of the upper prefabricated panel body 31 forms at least one arc-shaped opening 45. The lower prefabricated panel 4 is composed of a lower prefabricated panel body 41, a third embedded groove 42 is formed on the lower edge of the lower prefabricated panel body 41 along the length direction of the lower edge, a fourth embedded groove 44 is formed on the left edge of the lower prefabricated panel body 41, a second embedded strip 43 is provided on the right edge of the lower prefabricated panel body 41, and a second embedded strip 43 is provided on the right edge of the lower prefabricated panel body 41. An arcuate opening 45 is formed on the upper edge of the prefabricated plate body 41, corresponding to the arcuate opening 45 of the upper prefabricated plate body 31. The two corresponding arcuate openings 45 can be assembled into a cable hole 6. In the space formed by the first lower recessed groove 22 and the first upper recessed groove 52, the first embedded groove 32 is embedded in the lower edge corresponding to the upper flame-retardant partition body 23, the second embedded groove 34 is embedded in the corresponding side edge of the first lower protrusion 21, the first embedded strip 33 is embedded in the corresponding slot 13, the third embedded groove 42 is embedded in the upper edge corresponding to the middle flame-retardant partition body 53, the fourth embedded groove 44 is embedded in the side edge corresponding to the first upper protrusion 51, the second embedded strip 43 is embedded in the corresponding slot 13, and the space formed by the second lower recessed groove 54 and the second upper recessed groove 72 is formed.The first embedding groove 32 is embedded in the corresponding lower edge of the middle flame-retardant partition body 53, the second embedding groove 34 is embedded in the corresponding side edge of the second lower protrusion 55, the first embedding strip 33 is embedded in the corresponding slot 13, the third embedding groove 42 is embedded in the corresponding upper edge of the lower flame-retardant partition body 73, the fourth embedding groove 44 is embedded in the corresponding side edge of the second upper recessed groove 72, and the second embedding strip 43 is embedded in the corresponding slot 13. The cable 8 is placed in the cable hole 6 and placed on the corresponding cable shelf 14. The cable hole 6 without the cable 8 can be sealed with a plug.

[0033] Example 2: See Figures 9 to 11 , and refer to Figures 1 to 6, an assembled fire wall for power cable trench, having a bracket 1, characterized in that the bracket 1 is composed of a bracket body 11, the bracket body 11 is U-shaped, a vertical slot 13 is formed in the middle of the left and right side walls of the bracket body 11, and the side walls of the bracket body 11 on both sides of the slot 13 form an observation hole 12, and a cable shelf 14 is provided on the front and back sides of the bracket body 11, and the lower flame retardant partition 7, the middle flame retardant partition 5 and the upper flame retardant partition 2 are inserted into the slot 13 from bottom to top respectively, the lower flame retardant partition 7 is composed of a lower flame retardant partition body 73 and a second upper protrusion 71 located in the middle above the lower flame retardant partition body 73, a second upper concave groove 72 is formed on each side of the second upper protrusion 71, and the middle flame retardant partition 5 is composed of a middle flame retardant partition body 53, the first upper protrusion 51 located above the middle of the middle flame retardant partition body 53 and the second lower protrusion 55 below the middle of the middle flame retardant partition body 53 are composed of a first upper concave groove 52 formed on both sides of the first upper protrusion 51, and a second lower concave groove 54 formed on both sides of the second lower protrusion 55. The upper flame retardant partition 2 is composed of an upper flame retardant partition body 23 and a first lower protrusion 21 located in the middle below the upper flame retardant partition body 23. A first lower concave groove 22 is formed on both sides of the first lower protrusion 21. The space formed by the first lower concave groove 22 and the first upper concave groove 52, and the space formed by the second lower concave groove 54 and the second upper concave groove 72 are provided with an upper prefabricated plate 3 and a lower prefabricated plate 4. The upper prefabricated plate 3 is composed of an upper The prefabricated plate body 31 is composed of a first embedding groove 32 formed along the length direction of the upper edge of the upper prefabricated plate body 31, a second embedding groove 34 formed along the length direction of the left edge of the upper prefabricated plate body 31, and a first embedding strip 33 along the length direction of the right edge is provided on the right edge of the upper prefabricated plate body 31. At least one arc-shaped opening 45 is formed on the lower edge of the upper prefabricated plate body 31. A first group of partition cavities 39 that pass through the side walls of the arc-shaped opening 45 are formed in the upper prefabricated plate body 31 above each arc-shaped opening 45. The side walls of the first group of partition cavities 39 form a long strip hole 36 in the same length direction as the first group of partition cavities 39. A blocking plate 38 is provided in the first group of partition cavities 39, and a lever 3 is provided on the blocking plate 38. 7. The lever 37 is located in the long hole 36, and the lever 37 protrudes from the long hole 36. The lower prefabricated plate 4 is composed of a lower prefabricated plate body 41. The lower edge of the lower prefabricated plate body 41 forms a third embedding groove 42 along the length direction of the lower edge, and the left edge of the lower prefabricated plate body 41 forms a fourth embedding groove 44 along the length direction of the left edge. The right edge of the lower prefabricated plate body 41 is provided with a second embedding strip 43 along the length direction of the right edge. The upper edge of the lower prefabricated plate body 41 forms an arcuate opening 45 corresponding to the arcuate opening 45 of the upper prefabricated plate body 31, and a second baffle plate cavity 46 is formed below the arcuate opening 45 and penetrates the side wall of the arcuate opening 45. When the lever 37 is pushed to the bottom of the long hole 36, the baffle plate 38 is inserted into the second baffle plate cavity 46.And completely cover the corresponding two arc-shaped openings 45, the upper and lower corresponding arc-shaped openings 45 can be assembled into a cable hole 6, the first lower recessed groove 22 and the first upper recessed groove 52 form a space, the first embedded groove 32 is embedded in the lower edge corresponding to the upper flame retardant partition body 23, the second embedded groove 34 is embedded in the corresponding side edge of the first lower protrusion 21, the first embedded strip 33 is embedded in the corresponding slot 13, the third embedded groove 42 is embedded in the upper edge corresponding to the middle flame retardant partition body 53, the fourth embedded groove 44 is embedded in the side edge corresponding to the first upper protrusion 51, and the second embedded strip 43 is embedded in the corresponding In the slot 13, within the space formed by the second lower recessed groove 54 and the second upper recessed groove 72, the first embedding groove 32 is embedded in the corresponding lower edge of the middle flame-retardant partition body 53, the second embedding groove 34 is embedded in the corresponding side edge of the second lower protrusion 55, the first embedding strip 33 is embedded in the corresponding slot 13, the third embedding groove 42 is embedded in the corresponding upper edge of the lower flame-retardant partition body 73, the fourth embedding groove 44 is embedded in the corresponding side edge of the second upper recessed groove 72, the second embedding strip 43 is embedded in the corresponding slot 13, the cable 8 is placed in the cable hole 6, and the cable 8 is placed on the corresponding cable shelf 14.

[0034] The upper and lower arc-shaped openings 45 that are not used in this embodiment are pushed downward by the lever 37 according to fire prevention needs, so that the baffle plate 38 enters the second baffle plate cavity 46 from the first group of baffle cavities 39, thereby achieving the purpose of closing the unused upper and lower arc-shaped openings 45, so that the burning flame will not pass through the upper and lower arc-shaped openings 45 to the other side.

[0035] Example 3: See Figures 12 to 14 , and refer to Figures 1 to 6, an assembled fire wall for power cable trench, having a bracket 1, characterized in that the bracket 1 is composed of a bracket body 11, the bracket body 11 is U-shaped, a vertical slot 13 is formed in the middle of the left and right side walls of the bracket body 11, and the side walls of the bracket body 11 on both sides of the slot 13 form an observation hole 12, and a cable shelf 14 is provided on the front and back sides of the bracket body 11, and the lower flame retardant partition 7, the middle flame retardant partition 5 and the upper flame retardant partition 2 are inserted into the slot 13 from bottom to top respectively, the lower flame retardant partition 7 is composed of a lower flame retardant partition body 73 and a second upper protrusion 71 located in the middle above the lower flame retardant partition body 73, a second upper concave groove 72 is formed on each side of the second upper protrusion 71, and the middle flame retardant partition 5 is composed of a middle flame retardant partition 73. The flame retardant partition body 53, the first upper protrusion 51 located above the middle of the middle flame retardant partition body 53 and the second lower protrusion 55 below the middle of the middle flame retardant partition body 53 are composed of a first upper concave groove 52 formed on both sides of the first upper protrusion 51, and a second lower concave groove 54 formed on both sides of the second lower protrusion 55. The upper flame retardant partition 2 is composed of an upper flame retardant partition body 23 and a first lower protrusion 21 located in the middle below the upper flame retardant partition body 23. A first lower concave groove 22 is formed on both sides of the first lower protrusion 21. The upper prefabricated plate 3 and the lower prefabricated plate 3 are provided in the space formed by the first lower concave groove 22 and the first upper concave groove 52, and the space formed by the second lower concave groove 54 and the second upper concave groove 72. Plate 4, the upper prefabricated plate 3 is composed of an upper prefabricated plate body 31, the upper edge of the upper prefabricated plate body 31 forms a first embedded groove 32 along the length direction of the upper edge, the left edge of the upper prefabricated plate body 31 forms a second embedded groove 34 along the length direction of the left edge, the right edge of the upper prefabricated plate body 31 is provided with a first embedded strip 33 along the length direction of the right edge, the lower edge of the upper prefabricated plate body 31 forms at least one first impeller cavity 310, the first impeller cavity 310 is provided with an impeller 47, the impeller 47 is composed of at least one first blade 471 with an arc-shaped opening 45 on the rotating shaft 473, and the same number of second blades 472 as the first blade 471, and the first blade 471 and the corresponding second blade 472 are symmetrically fixed to the rotating shaft 4 73 side wall, the impeller 47 can rotate around the rotating shaft 473, and the side wall of the impeller 47 has static friction with the side wall of the first impeller cavity 310. The lower prefabricated plate 4 is composed of a lower prefabricated plate body 41. The lower edge of the lower prefabricated plate body 41 forms a third embedded groove 42 along the length direction of the lower edge, the left edge of the lower prefabricated plate body 41 forms a fourth embedded groove 44 along the length direction of the left edge, and the right edge of the lower prefabricated plate body 41 is provided with a second embedded strip 43 along the length direction of the right edge. The upper edge of the lower prefabricated plate body 41 forms a second impeller cavity 48 corresponding to the first impeller cavity 310 of the upper prefabricated plate body 31. The second impeller cavity 48 is provided with an impeller 47, and the side wall of the impeller 47 has static friction with the side wall of the second impeller cavity 48.

[0036] The arc-shaped opening 45 of the first blade 471 of the impeller 47 in the first impeller cavity 310 and the arc-shaped opening 45 corresponding to the first blade 471 of the impeller 47 in the second impeller cavity 48 have the same inner diameter and can be assembled into a cable hole 6. The inner diameters of the arc-shaped openings 45 of each first blade 471 on the same impeller 47 are different. When any first blade 471 or second blade 472 of the upper and lower impellers 47 are aligned, the sum of the heights of the two blades and the rotating shaft 473 is the same as the sum of the heights of the first impeller cavity 310 and the second impeller cavity 48. In the space formed by the first lower recessed groove 22 and the first upper recessed groove 52, the first embedded groove 32 is embedded in the lower edge corresponding to the upper flame-retardant partition body 23, and the second embedded groove 34 is embedded in the corresponding first lower protrusion 21. The side edge, the first embedded strip 33 is embedded in the corresponding slot 13, the third embedded groove 42 is embedded in the upper edge corresponding to the middle flame retardant partition body 53, the fourth embedded groove 44 is embedded in the side edge corresponding to the first upper protrusion 51, the second embedded strip 43 is embedded in the corresponding slot 13, the second lower recessed groove 54 and the second upper recessed groove 72 are in the space formed, the first embedded groove 32 is embedded in the lower edge corresponding to the middle flame retardant partition body 53, the second embedded groove 34 is embedded in the side edge corresponding to the second lower protrusion 55, the first embedded strip 33 is embedded in the corresponding slot 13, the third embedded groove 42 is embedded in the upper edge corresponding to the lower flame retardant partition body 73, the fourth embedded groove 44 is embedded in the side edge corresponding to the second upper recessed groove 72, and the second embedded strip 43 is embedded in the corresponding slot 13.

[0037] During operation, the first blades 471 of the same arc-shaped openings 45 of the upper and lower impellers 47 are adjusted to relative positions so that the two corresponding arc-shaped openings 45 form a cable hole 6, and the cable 8 is placed in the cable hole 6, and the cable 8 is placed on the corresponding cable shelf 14.

[0038] In this embodiment, the impeller can be rotated to find the corresponding first blade 471 according to the outer diameter of different cables, without replacing the upper prefabricated plate 3 and the lower prefabricated plate 4, which is convenient to use. The unused second impeller cavity 48 and the first impeller cavity 310 can be rotated according to the fire protection needs to rotate the impeller 47 so that the second blades 472 of the upper and lower impellers 47 are aligned, and the second impeller cavity 48 and the first impeller cavity 310 are closed, so that the burning flame will not pass through the upper and lower arc-shaped openings 45 to the other side.

[0039] The present invention solves the problem in the prior art that after a firewall is built, when the firewall needs to be dismantled for capacity expansion or cable replacement, fire easily leaks into the cable hole.

[0040] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions described in the claims, including equivalent alternatives to the technical features of the technical solutions described in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. An assembled fire wall for a power cable trench, comprising a bracket (1), characterized in that: The bracket (1) is composed of a bracket body (11), the bracket body (11) is U-shaped, and a vertical slot (13) is formed in the middle of the left and right side walls of the bracket body (11), and a flame retardant partition assembly is inserted into the slot (13), and the flame retardant partition assembly is embedded in the upper prefabricated plate (3) and the lower prefabricated plate (4), the upper prefabricated plate (3) is composed of an upper prefabricated plate body (31), and at least one arc-shaped opening (45) is formed on the lower edge of the upper prefabricated plate body (31), and the lower prefabricated plate (4) is composed of a lower prefabricated plate body (41), and an arc-shaped opening (45) corresponding to the arc-shaped opening (45) of the upper prefabricated plate body (31) is formed on the upper edge of the lower prefabricated plate body (41), and the two corresponding arc-shaped openings (45) can be combined into a cable hole (6), and the cable (8) is placed in the cable hole (6); The flame retardant partition assembly is composed of a lower flame retardant partition (7), a middle flame retardant partition (5) and an upper flame retardant partition (2) from bottom to top. The lower flame retardant partition (7) is composed of a lower flame retardant partition body (73) and a second upper protrusion (71) located in the middle above the lower flame retardant partition body (73), and a second upper concave groove (72) is formed on both sides of the second upper protrusion (71). The middle flame retardant partition (5) is composed of a middle flame retardant partition body (53), a first upper protrusion (51) located above the middle of the middle flame retardant partition body (53), and a second lower protrusion (55) located below the middle of the middle flame retardant partition body (53). A first upper concave groove (52) is formed on both sides of the first upper protrusion (51), and a second lower protrusion (55) located below the middle of the middle flame retardant partition body (53). (55) A second lower concave groove (54) is formed on each side, the upper flame retardant partition (2) is composed of an upper flame retardant partition body (23) and a first lower protrusion (21) located in the middle below the upper flame retardant partition body (23), a first lower concave groove (22) is formed on each side of the first lower protrusion (21), the upper prefabricated plate (3) and the lower prefabricated plate (4) are located in the space formed by the first lower concave groove (22) and the first upper concave groove (52), and in the space formed by the second lower concave groove (54) and the second upper concave groove (72), the upper edge of the upper prefabricated plate body (31) forms a first embedded groove (32) along the length direction of the upper edge, and the left edge of the upper prefabricated plate body (31) forms a first embedded groove (32) along the length direction of the left edge. A second embedding groove (34), a first embedding strip (33) along the length direction of the right edge is provided on the right edge of the upper prefabricated plate body (31), a third embedding groove (42) along the length direction of the lower edge is formed on the lower edge of the lower prefabricated plate body (41), a fourth embedding groove (44) along the length direction of the left edge is formed on the left edge of the lower prefabricated plate body (41), a second embedding strip (43) along the length direction of the right edge is provided on the right edge of the lower prefabricated plate body (41), in the space formed by the first lower concave groove (22) and the first upper concave groove (52), the first embedding groove (32) is embedded in the lower edge corresponding to the upper flame-retardant partition body (23), and the second embedding groove (34) is embedded in the side edge corresponding to the first lower protruding portion (21), The first embedding strip (33) is embedded in the corresponding slot (13), the third embedding slot (42) is embedded in the upper edge corresponding to the middle flame retardant partition body (53), the fourth embedding slot (44) is embedded in the side edge corresponding to the first upper protrusion (51), the second embedding strip (43) is embedded in the corresponding slot (13), the second lower recessed slot (54) and the second upper recessed slot (72) are in the space formed, the first embedding slot (32) is embedded in the lower edge corresponding to the middle flame retardant partition body (53), the second embedding slot (34) is embedded in the side edge corresponding to the second lower protrusion (55), the first embedding strip (33) is embedded in the corresponding slot (13), the third embedding slot (42) is embedded in the upper edge corresponding to the lower flame retardant partition body (73),The fourth embedding groove (44) is embedded in the corresponding side edge of the second upper recessed groove (72), and the second embedding strip (43) is embedded in the corresponding slot (13).

2. The assembled fire wall for power cable trench according to claim 1, characterized in that: A first group of partition plate cavities (39) is formed above the arc-shaped opening (45) of the upper prefabricated plate body (31) and is communicated with the side wall of the arc-shaped opening (45). The side wall of the first group of partition plate cavities (39) forms a long hole (36) having the same length direction as the first group of partition plate cavities (39). A blocking plate (38) is provided in the first group of partition plate cavities (39). A shifting rod (37) is provided on the blocking plate (38). The shifting rod (37) is located in the long hole (36) and protrudes from the long hole (36). A second blocking plate cavity (46) is formed below the arc-shaped opening (45) of the lower prefabricated plate body (41) and is communicated with the side wall of the arc-shaped opening (45). When the shifting rod (37) is shifted to the bottom of the long hole (36), the blocking plate (38) is inserted into the second blocking plate cavity (46) and completely covers the corresponding two arc-shaped openings (45).

3. An assembled fire wall for a power cable trench, comprising a bracket (1), characterized in that: The bracket (1) is composed of a bracket body (11), the bracket body (11) is U-shaped, and a vertical slot (13) is formed in the middle of the left and right side walls of the bracket body (11), and a flame retardant baffle assembly is inserted into the slot (13), and the flame retardant baffle assembly is embedded in the upper prefabricated plate (3) and the lower prefabricated plate (4), and the upper prefabricated plate (3) is composed of an upper prefabricated plate body (31), and the lower edge of the upper prefabricated plate body (31) forms at least one first impeller cavity (310), and the first impeller cavity (310) is provided with a plurality of first impeller cavities (311). 10) is provided with an impeller (47), the impeller (47) is composed of at least one first blade (471) with an arc-shaped opening (45) on the rotating shaft (473), and the same number of second blades (472) as the first blade (471). The first blade (471) and the corresponding second blade (472) are fixed to the side wall of the rotating shaft (473) in an axially symmetrical manner. The impeller (47) can rotate around the rotating shaft (473). The side wall of the impeller (47) and the side wall of the first impeller cavity (310) have static friction. The lower prefabricated plate (4) It is composed of a lower prefabricated plate body (41), the upper edge of the lower prefabricated plate body (41) forms a second impeller cavity (48) corresponding to the first impeller cavity (310) of the upper prefabricated plate body (31), an impeller (47) is provided in the second impeller cavity (48), the side wall of the impeller (47) and the side wall of the second impeller cavity (48) have static friction, the arc-shaped opening (45) of the first blade (471) of the impeller (47) in the first impeller cavity (310) and the arc-shaped opening (45) of the second impeller cavity (48) are connected to the first impeller cavity (310). The arc-shaped openings (45) of the first blades (471) corresponding to the impeller (47) have the same inner diameter and can be combined to form a cable hole (6). The inner diameters of the arc-shaped openings (45) of the first blades (471) on the same impeller (47) are different. When any one of the first blades (471) or the second blades (472) of the upper and lower impellers (47) are aligned, the sum of the heights of the two blades and the rotating shaft (473) is the same as the sum of the heights of the first impeller cavity (310) and the second impeller cavity (48). Observation holes (12) are formed on the side walls of the bracket body (11) on both sides of the slot (13); and cable shelves (14) are provided on the front and rear sides of the bracket body (11).

4. The assembled fire wall for power cable trench according to claim 3, characterized in that: The flame retardant partition assembly is composed of a lower flame retardant partition (7), a middle flame retardant partition (5) and an upper flame retardant partition (2) from bottom to top. The lower flame retardant partition (7) is composed of a lower flame retardant partition body (73) and a second upper protrusion (71) located in the middle above the lower flame retardant partition body (73), and a second upper concave groove (72) is formed on both sides of the second upper protrusion (71). The middle flame retardant partition (5) is composed of a middle flame retardant partition body (53), a first upper protrusion (51) located above the middle of the middle flame retardant partition body (53), and a second lower protrusion (55) located below the middle of the middle flame retardant partition body (53). A first upper concave groove (52) is formed on both sides of the first upper protrusion (51), and a second lower protrusion (55) located below the middle of the middle flame retardant partition body (53). (55) A second lower concave groove (54) is formed on each side, the upper flame retardant partition (2) is composed of an upper flame retardant partition body (23) and a first lower protrusion (21) located in the middle below the upper flame retardant partition body (23), a first lower concave groove (22) is formed on each side of the first lower protrusion (21), the upper prefabricated plate (3) and the lower prefabricated plate (4) are located in the space formed by the first lower concave groove (22) and the first upper concave groove (52), and in the space formed by the second lower concave groove (54) and the second upper concave groove (72), the upper edge of the upper prefabricated plate body (31) forms a first embedded groove (32) along the length direction of the upper edge, and the left edge of the upper prefabricated plate body (31) forms a first embedded groove (32) along the length direction of the left edge. A second embedding groove (34), a first embedding strip (33) along the length direction of the right edge is provided on the right edge of the upper prefabricated plate body (31), a third embedding groove (42) along the length direction of the lower edge is formed on the lower edge of the lower prefabricated plate body (41), a fourth embedding groove (44) along the length direction of the left edge is formed on the left edge of the lower prefabricated plate body (41), a second embedding strip (43) along the length direction of the right edge is provided on the right edge of the lower prefabricated plate body (41), in the space formed by the first lower concave groove (22) and the first upper concave groove (52), the first embedding groove (32) is embedded in the lower edge corresponding to the upper flame-retardant partition body (23), and the second embedding groove (34) is embedded in the side edge corresponding to the first lower protruding portion (21), The first embedding strip (33) is embedded in the corresponding slot (13), the third embedding slot (42) is embedded in the upper edge corresponding to the middle flame retardant partition body (53), the fourth embedding slot (44) is embedded in the side edge corresponding to the first upper protrusion (51), the second embedding strip (43) is embedded in the corresponding slot (13), the second lower recessed slot (54) and the second upper recessed slot (72) are in the space formed, the first embedding slot (32) is embedded in the lower edge corresponding to the middle flame retardant partition body (53), the second embedding slot (34) is embedded in the side edge corresponding to the second lower protrusion (55), the first embedding strip (33) is embedded in the corresponding slot (13), the third embedding slot (42) is embedded in the upper edge corresponding to the lower flame retardant partition body (73),The fourth embedding groove (44) is embedded in the corresponding side edge of the second upper recessed groove (72), and the second embedding strip (43) is embedded in the corresponding slot (13).

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