A power cabinet for power construction site and installation method thereof

Abstract

The present invention relates to the field of electric power construction technology, and in particular to an electric power cabinet for an electric power construction site and an installation method thereof. The electric power cabinet for an electric power construction site and the installation method thereof adopt an electric power cabinet for an electric power construction site and an installation device thereof. The electric power cabinet for an electric power construction site and the installation device thereof include a cement block, a pit is provided in the middle of the cement block, and fixing components are fixed inside and outside the pit to stabilize the electric power cabinet. A lifting component is provided in the pit to lift and waterproof the electric power cabinet. The electric power cabinet is provided in the fixing component. An internal waterproof component is provided inside the electric power cabinet to cooperate with the lifting component to waterproof the electric power equipment inside the electric power cabinet. Heat dissipation, dehumidification and dust removal components are provided on both sides of the electric power cabinet above the internal waterproof component to dehumidify, dust and heat dissipate the electric equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power construction, and in particular to an electric power cabinet for an electric power construction site and an installation method thereof. Background Art

[0002] Existing power equipment is troublesome to install in the power cabinet. It takes a lot of time and effort for the staff to install it in the power cabinet, which greatly reduces the efficiency of installation. It is also inconvenient for the staff to inspect and maintain the power equipment inside the power cabinet. Outdoor power cabinets must also be waterproofed in heavy rain weather to prevent water from entering the power cabinet and causing adverse effects. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems in the prior art and to propose a power cabinet for power construction sites and an installation method thereof.

[0004] In order to achieve the above object, the present invention adopts the following technical scheme: a power cabinet for a power construction site and an installation method thereof, comprising the following steps:

[0005] S1: Build a boss with cement at the power construction site, with a groove in the middle of the boss;

[0006] S2: fixed frame, fixedly welded to the steel pipe frame on the boss;

[0007] S3: Fix the lifting components, fix the lifting components in the groove of the boss, slide the sliding plate on the four steel pipe frames, and weld steel pipes at the upper ends of the four steel pipe frames for reinforcement;

[0008] S4: The power cabinet is put in, and the power cabinet is fixed on the sliding plate on the frame, and the threads of the power cabinet are inserted into the four threaded columns;

[0009] S5: Install waterproof components. Use four threaded columns to install waterproof components inside the power cabinet.

[0010] S6: Installation of power equipment: installing power equipment in the power cabinet and connecting the lines;

[0011] S7: Normal operation, the power cabinet performs dehumidification, dust removal and heat dissipation;

[0012] Steps S1-S7 use an electric power cabinet and its installation equipment for an electric power construction site, which includes a cement block with a pit in the middle, fixed components fixed inside and outside the pit to stabilize the power cabinet, a lifting component is provided in the pit to lift and waterproof the power cabinet, the fixed component is provided with an electric power cabinet, an internal waterproof component is provided inside the power cabinet to cooperate with the lifting component to waterproof the electric equipment inside the power cabinet, and heat dissipation, dehumidification and dust removal components are provided on both sides of the power cabinet above the internal waterproof component to dehumidify, dust and heat the electric equipment.

[0013] Preferably, the fixing components include four steel pipes, which are fixed on cement blocks on the periphery of the pit, sliding plates are provided on the four steel pipes, guard bars are fixed on the upper ends of the four steel pipes, a power cabinet is provided on the sliding plates, a sealed door is provided on one side of the power cabinet, a handle is fixed on the sealed door facing outside the power cabinet, transparent glass is provided on the sealed door for observing the internal situation, a rotating column is provided in connection with the sealed door and the power cabinet, and three sealing sliding plates are provided on the other three ends of the sealed door for sliding to seal and waterproof.

[0014] Preferably, the lifting component includes a lifting group, which is located in the pit. The lifting group includes two first fixed blocks, which are fixed on cement blocks. Two first threaded columns pass through the middle of the two first fixed blocks. Two moving blocks are moved away from one end of the two first threaded columns away from the first fixed blocks. Two first motors are fixed to one end of the two first threaded columns away from the moving blocks. Two first telescopic frames are fixed to the upper ends of the two first fixed blocks and the two moving blocks.

[0015] Preferably, a threaded lifting group is provided on the periphery of the lifting group, and the threaded lifting group includes four second motors, the four second motors are fixed on the cement blocks, four second threaded columns are fixed on the upper ends of the four second motors, the four second threaded columns pass through the sliding plate and enter the power cabinet, four springs are provided on the periphery of the four second threaded columns between the sliding plate and the pit, two second fixed blocks are rotatably connected on the four springs, the two second fixed blocks are fixed inside the power cabinet, two sliding blocks are provided above the two second fixed blocks, the two sliding blocks are threadably rotatably connected to the four second threaded columns, and the two sliding blocks slide in the power cabinet.

[0016] Preferably, the heat dissipation, dehumidification and dust removal components include a waterproof group, which is located inside the power cabinet. The waterproof group includes two second telescopic frames, which are fixed on the sliding block and the second fixed block. Two first waterproof plates are fixed on the two second telescopic frames in opposite directions, a second waterproof plate is provided between the two first waterproof plates, and two telescopic waterproof plates are provided on both sides of the second waterproof plate in a sliding connection with the two first waterproof plates.

[0017] Preferably, the heat dissipation and dehumidification and dust removal component includes a dehumidification and dust removal group, which is located on both sides of the power cabinet above the internal waterproof component, the dehumidification and dust removal group includes a plurality of first air inlet holes, the plurality of first air inlet holes are distributed on both sides of the power cabinet, the plurality of first air inlet holes are provided with two sliding cavities towards the interior of the power cabinet, two water-absorbing cotton plates are slidably provided in the two sliding cavities, two waterproof ventilation plates are fixedly provided with two waterproof ventilation plates at the upper ends of the two water-absorbing cotton plates, the two waterproof ventilation plates slide on the two sliding cavities, two first air suction cavities are provided at the lower ends of the two sliding cavities towards the interior of the power cabinet, two dust removal cavities are provided towards the interior of the power cabinet, two air inlet channels are provided near the upper ends of the two dust removal cavities towards the interior of the power cabinet, the two air inlet channels are provided with two air inlet cavities towards the interior of the power cabinet, the two air inlet cavities are provided with two rotating disks towards the interior of the power cabinet, a plurality of activated carbon cavities are evenly provided inside the two rotating disks, a second air inlet is provided between the activated carbon cavity and the air inlet cavity, and a plurality of air outlets are provided between the activated carbon cavity and the interior of the power cabinet.

[0018] Preferably, two rotating columns are fixedly provided between the two rotating disks, two third motors are fixedly provided on the two rotating columns toward the interior of the power cabinet, two heat dissipation cavities are provided above the two air intake cavities, the two heat dissipation cavities are connected with the two first air intake cavities, two fourth motors are fixedly provided inside the two heat dissipation cavities, two fans are provided on the two fourth motors, and two heat dissipation holes are provided in the two heat dissipation cavities through the activated carbon cavity.

[0019] Beneficial effects:

[0020] 1. Fix and lift the external power cabinet to prevent it from tipping over and getting flooded in rainy days.

[0021] 2. The internal working environment of the power cabinet is effectively guaranteed through dust removal, dehumidification and heat dissipation of the power cabinet.

[0022] 3. The internal space of the power cabinet is changed by lifting the power cabinet to achieve waterproofing inside the power cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a flow chart of the method.

[0024] Figure 2 It is an isometric structural schematic diagram of the present invention.

[0025] Figure 3 It is a front view structural schematic diagram of the present invention.

[0026] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle.

[0027] Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure at BB in the middle.

[0028] Figure 6 It is a schematic diagram of the top view structure of the present invention.

[0029] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure at CC in the middle.

[0030] Figure 8 for Figure 7 Schematic diagram of the structure of the local enlarged view at point A in the middle.

[0031] In the figure, a power cabinet 10, a fixing part 11, a lifting part 12, an internal waterproof part 13, a heat dissipation, dehumidification and dust removal part 14, a cement block 15, a pit 16, a steel pipe 17, a sliding plate 18, a first motor 19, a first fixing block 20, a moving block 21, a first threaded column 22, a first telescopic frame 23, a lifting group 24, a guard rod 25, a threaded lifting group 26, a second motor 27, a second threaded column 28, a second fixing block 29, a sliding block 30, a waterproof group 31, a first waterproof plate 32, a second telescopic frame 33, a first Second waterproof plate 34, telescopic waterproof plate 35, dehumidification and dust removal group 36, first air inlet 37, absorbent cotton plate 38, waterproof ventilation plate 39, sliding cavity 40, first air suction cavity 41, dust removal cavity 42, air inlet channel 43, air inlet cavity 44, rotating disk 45, activated carbon cavity 46, second air inlet 47, air outlet 48, rotating column 49, third motor 50, fourth motor 51, fan 52, heat dissipation hole 53, heat dissipation cavity 54, sealed door 55, handle 56, transparent glass 57, sealed sliding plate 58, spring 59. DETAILED DESCRIPTION

[0032] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0033] Combination Figure 1-8 , a power cabinet for a power construction site and an installation method thereof, comprising the following steps:

[0034] S1: Build a boss with cement at the power construction site, with a groove in the middle of the boss;

[0035] S2: fixed frame, fixedly welded to the steel pipe frame on the boss;

[0036] S3: Fix the lifting components, fix the lifting components in the groove of the boss, slide the sliding plate on the four steel pipe frames, and weld steel pipes at the upper ends of the four steel pipe frames for reinforcement;

[0037] S4: The power cabinet is put in, and the power cabinet is fixed on the sliding plate on the frame, and the threads of the power cabinet are inserted into the four threaded columns;

[0038] S5: Install waterproof components. Use four threaded columns to install waterproof components inside the power cabinet.

[0039] S6: Installation of power equipment: installing power equipment in the power cabinet and connecting the lines;

[0040] S7: Normal operation, the power cabinet performs dehumidification, dust removal and heat dissipation;

[0041] Steps S1-S7 use an electric power cabinet and its installation equipment for an electric power construction site, which includes a cement block 15, a pit 16 is provided in the middle of the cement block 15, and a fixing component 11 is fixed inside and outside the pit 16 to stabilize the electric power cabinet, a lifting component 12 is provided in the pit 16 to lift and waterproof the electric power cabinet, an electric power cabinet 10 is provided in the fixing component 11, and an internal waterproof component 13 is provided inside the electric power cabinet 10 to cooperate with the lifting component 12 to waterproof the electric power equipment inside the electric power cabinet, and heat dissipation, dehumidification and dust removal components 14 are provided on both sides of the electric power cabinet 10 above the internal waterproof component 13 to dehumidify, dust and heat the electric equipment.

[0042] Further, combined with Figure 1-8 The fixing component 11 includes four steel pipes 17, and the four steel pipes 17 are fixed on the cement block 15 outside the pit 16. The four steel pipes 17 are slidably provided with sliding plates 18. The upper ends of the four steel pipes 17 are fixed with guard rods 25. The sliding plates 18 are provided with power cabinets 10. A sealing door 55 is provided on one side of the power cabinet 10. The sealing door 55 is fixed with a handle 56 to the outside of the power cabinet 10. The sealing door 55 is provided with transparent glass 57 for observing the internal situation. The sealing door 55 is connected to the power cabinet 10 with a rotating column, and the other three ends of the sealing door 55 are slidably provided with three sealing sliding plates 58 for sealing and waterproofing.

[0043] Further, combined with Figure 1-8 The lifting component 12 includes a lifting group 24, which is located in the pit 16. The lifting group 24 includes two first fixed blocks 20, which are fixed on the cement block 15. Two first threaded columns 22 pass through the middle of the two first fixed blocks 20. Two moving blocks 21 are moved away from one end of the two first threaded columns 22 away from the first fixed blocks 20. Two first motors 19 are fixed at one end of the two first threaded columns 22 away from the moving blocks 21. Two first telescopic frames 23 are fixed at the upper ends of the two first fixed blocks 20 and the two moving blocks 21.

[0044] Further, combined with Figure 1-8A threaded lifting group 26 is provided on the periphery of the lifting group 24. The threaded lifting group 26 includes four second motors 27. The four second motors 27 are fixed on the cement block 15. Four second threaded columns 28 are fixed on the upper ends of the four second motors 27. The four second threaded columns 28 pass through the sliding plate 18 and penetrate into the power cabinet 10. Four springs 59 are provided between the sliding plate 18 and the pit 16 on the periphery of the four second threaded columns 28. Two second fixed blocks 29 are rotatably connected on the four springs 59. The two second fixed blocks 29 are fixed inside the power cabinet 10. Two sliding blocks 30 are provided above the two second fixed blocks 29. The two sliding blocks 30 are threadably rotatably connected to the four second threaded columns 28, and the two sliding blocks 30 slide in the power cabinet 10.

[0045] Further, combined with Figure 1-8 The heat dissipation, dehumidification and dust removal component 14 includes a waterproof group 31, which is located inside the power cabinet 10. The waterproof group 31 includes two second telescopic frames 33, and the two second telescopic frames 33 are fixed on the sliding block 30 and the second fixed block 29. Two first waterproof plates 32 are fixedly provided on the two second telescopic frames 33 in opposite directions, and a second waterproof plate 34 is provided between the two first waterproof plates 32. Two telescopic waterproof plates 35 are provided on both sides of the second waterproof plate 34 in sliding connection with the two first waterproof plates 32.

[0046] Further, combined with Figure 1-8 The heat dissipation, dehumidification and dust removal component 14 includes a dehumidification and dust removal group 36, which is located on both sides of the power cabinet 10 above the internal waterproof component 13. The dehumidification and dust removal group 36 includes a plurality of first air inlet holes 37, and the plurality of first air inlet holes 37 are distributed on both sides of the power cabinet 10. The plurality of first air inlet holes 37 are provided with two sliding cavities 40 in the direction of the inside of the power cabinet 10. Two water-absorbing cotton plates 38 are slidably provided in the two sliding cavities 40. Two waterproof ventilation plates 39 are fixed at the upper ends of the two water-absorbing cotton plates 38. The two waterproof ventilation plates 39 slide on the two sliding cavities 40, and the lower ends of the two sliding cavities 40 are directed to the inside of the power cabinet 10. Two first air suction chambers 41 are provided, two sliding chambers 40 are provided with two dust removal chambers 42 toward the interior of the power cabinet 10, two dust removal chambers 42 are provided with two air inlet channels 43 near the upper ends toward the interior of the power cabinet 10, two air inlet channels 43 are provided with two air inlet chambers 44 toward the interior of the power cabinet 10, two air inlet chambers 44 are provided toward the interior of the power cabinet 10, two rotating disks 45 are provided toward the interior of the power cabinet 10, a plurality of activated carbon chambers 46 are evenly arranged inside the two rotating disks 45, a second air inlet hole 47 is provided between the activated carbon chamber 46 and the air inlet chamber 44, and a plurality of air outlet holes 48 are provided to the activated carbon chamber 46 and the interior of the power cabinet 10.

[0047] Further, combined with Figure 1-8Two rotating columns 49 are fixedly arranged between the two rotating disks 45, and two third motors 50 are fixedly arranged on the two rotating columns 49 toward the inside of the power cabinet 10. Two heat dissipation cavities 54 are arranged above the two air intake cavities 44, and the two heat dissipation cavities 54 are communicated with the two first air intake cavities 41. Two fourth motors 51 are fixedly arranged inside the two heat dissipation cavities 54, and two fans 52 are arranged on the two fourth motors 51. The two heat dissipation cavities 54 are provided with two heat dissipation holes 53 through the activated carbon cavity 46.

[0048] How it works

[0049] When the power cabinet is working, air enters the sliding cavity 40 through the first air inlet hole 37, and the air enters the dust removal cavity 42 after the moisture is absorbed by the water-absorbing cotton board 38. Most of the dust in the air sinks in the dust removal cavity 42, and a small part follows the air into the air inlet cavity 44 through the second air inlet hole 47, and then enters the activated carbon cavity 46 through the second air inlet hole 47, where the moisture and dust are absorbed by the activated carbon for dehumidification and dust removal. The treated air passes through the air outlet hole 48 to dissipate heat and ventilate the electronic equipment in the power cabinet 10.

[0050] Part of the heat generated by the electronic equipment in the power cabinet 10 enters the first air suction chamber 41, and part of it enters the activated carbon chamber 46 through the heat dissipation holes 53 to dry and restore the activated carbon. When it rains, the moisture in the air increases, and there is too much moisture on the absorbent cotton board 38 and it slides down due to gravity, and is dried by the hot air in the first air suction chamber 41. The waterproof ventilation plate 39 blocks the moisture in the external air and allows a small amount of air to be introduced to prevent the electronic equipment in the power cabinet 10 from getting wet and affecting its work.

[0051] When encountering heavy rain, the three sealing sliding plates 58 on the sealing door 55 slide out to form a sealed state with the power cabinet 10, the first motor 19 starts to drive the moving block 21 to move through the rotation of the first threaded column 22, and the movement of the moving block 21 drives the first telescopic frame 23 to push the sliding plate 18 to slide on the steel pipe 17, the second motor 27 starts to drive the power cabinet 10 to move through the threaded rotation of the second threaded column 28, the power cabinet 10 is too high to prevent water from entering, the spring 59 performs a shock-absorbing effect when the power cabinet 10 is too high, the threaded rotation of the second threaded column 28 drives the sliding block 30 to slide down, the sliding block 30 slides down to push the second telescopic frame 33 to expand and push the first waterproof plate 32 to move to the middle of the power cabinet 10, the two first waterproof plates 32 move toward the middle to squeeze the telescopic waterproof plates 35 on both sides of the second waterproof plate 34, shrink the space inside the power cabinet 10 to perform waterproof work inside the power cabinet 10.

[0052] The above descriptions are merely embodiments of the present invention, and are not intended to limit the patent protection scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A power cabinet for a power construction site, characterized in that: The power cabinet for the power construction site is installed by using an installation device; the installation device comprises a cement block (15), wherein a recess (16) is provided in the middle of the cement block (15); the power cabinet for the power construction site comprises a fixing component (11) fixedly provided inside and outside the recess (16), wherein the fixing component (11) stabilizes the power cabinet, wherein a lifting component (12) is provided in the recess (16) to lift and waterproof the power cabinet, wherein a power cabinet (10) is provided in the fixing component (11), wherein an internal waterproof component (13) is provided inside the power cabinet (10) to cooperate with the lifting component (12) to waterproof the power equipment inside the power cabinet, and heat dissipation, dehumidification and dust removal components (14) are provided on both sides of the power cabinet (10) above the internal waterproof component (13) to dehumidify, remove dust and dissipate heat for the power equipment; The lifting component (12) comprises a lifting group (24), the lifting group (24) is located in the pit (16), the lifting group (24) comprises two first fixed blocks (20), the two first fixed blocks (20) are fixed on the cement block (15), two first threaded columns (22) pass through the middle of the two first fixed blocks (20), two moving blocks (21) are arranged at one end of the two first threaded columns (22) away from the first fixed blocks (20), two first motors (19) are fixed at one end of the two first threaded columns (22) away from the moving blocks (21), and two first telescopic frames (23) are fixed at the upper ends of the two first fixed blocks (20) and the two moving blocks (21); A threaded lifting group (26) is provided on the periphery of the lifting group (24), and the threaded lifting group (26) includes four second motors (27). The four second motors (27) are fixed on the cement block (15). Four second threaded columns (28) are fixed on the upper ends of the four second motors (27). The four second threaded columns (28) pass through the sliding plate (18) and penetrate into the power cabinet (10). Four springs (59) are provided on the periphery of the four second threaded columns (28) between the sliding plate (18) and the pit (16). Two second fixed blocks (29) are rotatably connected on the four springs (59). The two second fixed blocks (29) are fixed inside the power cabinet (10). Two sliding blocks (30) are provided above the two second fixed blocks (29). The two sliding blocks (30) are threadedly rotatably connected to the four second threaded columns (28). The two sliding blocks (30) slide in the power cabinet (10); The heat dissipation, dehumidification and dust removal component (14) comprises a waterproof group (31), the waterproof group (31) is located inside the power cabinet (10), the waterproof group (31) comprises two second telescopic frames (33), the two second telescopic frames (33) are fixed on the sliding block (30) and the second fixed block (29), two first waterproof plates (32) are fixedly provided on the two second telescopic frames (33) in opposite directions, a second waterproof plate (34) is provided between the two first waterproof plates (32), and two telescopic waterproof plates (35) are provided on both sides of the second waterproof plate (34) in sliding connection with the two first waterproof plates (32); The heat dissipation, dehumidification and dust removal component (14) comprises a dehumidification and dust removal group (36), the dehumidification and dust removal group (36) is located on both sides of the power cabinet (10) above the internal waterproof component (13), the dehumidification and dust removal group (36) comprises a plurality of first air inlet holes (37), the plurality of first air inlet holes (37) are distributed on both sides of the power cabinet (10), the plurality of first air inlet holes (37) are provided with two sliding cavities (40) in the direction of the inside of the power cabinet (10), two water-absorbing cotton plates (38) are slidably provided in the two sliding cavities (40), two waterproof ventilation plates (39) are fixedly provided at the upper ends of the two water-absorbing cotton plates (38), the two waterproof ventilation plates (39) slide on the two sliding cavities (40), and the lower ends of the two sliding cavities (40) are provided with a plurality of first air inlet holes (37) in the direction of the inside of the power cabinet (10). There are two first air suction chambers (41), the two sliding chambers (40) are provided with two dust removal chambers (42) toward the inside of the power cabinet (10), the two dust removal chambers (42) are provided with two air inlet channels (43) near the upper ends toward the inside of the power cabinet (10), the two air inlet channels (43) are provided with two air inlet chambers (44) toward the inside of the power cabinet (10), the two air inlet chambers (44) are provided with two rotating disks (45) toward the inside of the power cabinet (10), a plurality of activated carbon chambers (46) are evenly arranged inside the two rotating disks (45), a second air inlet hole (47) is provided between the activated carbon chamber (46) and the air inlet chamber (44), and a plurality of air outlet holes (48) are provided between the activated carbon chamber (46) and the inside of the power cabinet (10); Two rotating columns (49) are fixedly arranged between the two rotating disks (45); two third motors (50) are fixedly arranged on the two rotating columns (49) toward the inside of the power cabinet (10); two heat dissipation cavities (54) are arranged above the two air intake cavities (44); the two heat dissipation cavities (54) are communicated with the two first air intake cavities (41); two fourth motors (51) are fixedly arranged inside the two heat dissipation cavities (54); two fans (52) are arranged on the two fourth motors (51); and the two heat dissipation cavities (54) are provided with two heat dissipation holes (53) through the activated carbon cavity (46); The electric power construction site power cabinet comprises the following steps when being installed: S1: Build a boss with cement at the power construction site, with a groove in the middle of the boss; S2: fixed frame, fixedly welded to the steel pipe frame on the boss; S3: Fix the lifting components, fix the lifting components in the groove of the boss, slide the sliding plate on the four steel pipe frames, and weld steel pipes at the upper ends of the four steel pipe frames for reinforcement; S4: The power cabinet is put in, and the power cabinet is fixed on the sliding plate on the frame, and the threads of the power cabinet are inserted into the four second threaded columns; S5: Install the waterproof component inside the power cabinet by using four second threaded columns inside the power cabinet; S6: Power equipment installation: install power equipment in the power cabinet and connect the lines; S7: Normal operation, the power cabinet performs dehumidification, dust removal and heat dissipation.

2. The power cabinet for electric power construction site according to claim 1, characterized in that: The fixing component (11) comprises four steel pipes (17), the four steel pipes (17) being fixed on a cement block (15) outside the pit (16), a sliding plate (18) being slidably provided on the four steel pipes (17), a guard rod (25) being fixedly provided on the upper ends of the four steel pipes (17), a power cabinet (10) being provided on the sliding plate (18), a sealing door (55) being provided on one side of the power cabinet (10), a handle (56) being fixedly provided on the sealing door (55) facing the outside of the power cabinet (10), a transparent glass (57) being provided on the sealing door (55) for observing the internal situation, a rotating column being provided on the sealing door (55) and the other three ends of the sealing door (55) being slidably provided with three sealing sliding plates (58) for sealing and waterproofing.

Images