CN217924481U - Double-layer structure board roofing siphon drainage structures - Google Patents

Abstract

The application relates to a siphon drainage structure of a double-layer structural plate roof, which comprises a siphon rainwater hopper, a pipeline assembly and a fixing assembly for fixing a pipeline; the water-saving floor board is characterized by also comprising an upper layer board and a lower layer board, wherein a support beam is arranged between the upper layer board and the lower layer board, and the upper layer board is concavely provided with a drainage groove; the siphon rainwater hopper is arranged at the bottom of the drainage tank; the siphon rainwater hopper is communicated with the pipeline assembly; the lower layer plate is provided with an access hole below the drainage groove, the siphon rainwater hopper is externally provided with a protective cover, and the side wall of the protective cover is provided with a water injection hole; the top of the protective cover is fixedly connected with a water inlet pipe with an upward opening; the side wall of the water inlet pipe is provided with a water inlet hole; the top of the protective cover is also provided with a flow guide frame which is used for guiding rainwater from the water inlet hole to the water injection hole and then discharging the rainwater into the protective cover; the side wall of the protective cover is also provided with a through hole which is positioned below the water injection hole; the protection casing still sets up the adjusting part who is used for opening and close the through-hole. This application can reduce hydrocone type rainwater fill and appear impurity and laying dust accumulation and lead to the problem that the drainage received the influence.

Description

Double-layer structure board roofing siphon drainage structures

Technical Field

The application relates to the technical field of roof siphon drainage, in particular to a roof siphon drainage structure with double-layer structural plates.

Background

Siphon roofing drainage system belongs to the higher drainage system of utilization ratio at present, is often used for the large-scale roofing rainwater drainage system of industrial factory building, storehouse, public building, and the component includes a plurality ofly such as siphon rainwater fill, pipe fitting, pipeline, mounting, and wherein the pipeline contains exhaust duct again, connecting tube, riser, suspension pipe etc. siphon roofing drainage system possesses powerful roofing drainage ability, the installation after occupy the space little, use the material quantity few, vigorously apply and promote during building engineering roofing drainage construction.

The siphon drainage structure who uses at present is through in the leading-in HDPE pipeline of rainwater that siphonic rainwater fill gathered the roof and then realize excreting, but often directly expose on the roof in the installation use of current siphonic rainwater fill, the roof stands to wind for a long time and shines, make rainwater fill department produce debris gathering and laying dust problem easily, wind blows the sun not only makes the durability of rainwater fill decline, and these debris and laying dust are to rainwater weather down drainage of siphonic rainwater fill department produce the interference easily, reduce drainage efficiency.

In order to solve the problems, the inventor thinks that the existing siphon rainwater hopper has the defects of difficult impurity separation and easy dust accumulation of the hopper body in the installation and the use.

Disclosure of Invention

In order to solve the siphon type rainwater fill and exist in the installation and use and be difficult to separation impurity and the easy laying dust problem of bucket body, this application provides a double-deck structural slab roofing siphon drainage structures.

The application provides a pair of double-deck structural slab roofing siphon drainage structures adopts following technical scheme:

a siphon drainage structure of a double-layer structural slab roof comprises a plurality of siphon rainwater hoppers, a pipeline assembly and a fixing assembly for fixing a pipeline; the method is characterized in that: the water-saving floor board is characterized by also comprising an upper layer board and a lower layer board, wherein a plurality of supporting beams are arranged between the upper layer board and the lower layer board at intervals, and the upper layer board is concavely provided with drainage channels at intervals along the length direction; the siphon rainwater hopper is fixedly arranged at the bottom of the drainage groove; the lower layer plate is provided with an access hole corresponding to the drainage groove, and the bottom of the siphon rainwater hopper penetrates through the bottom of the drainage groove and is communicated with the pipeline assembly; a protective cover is arranged outside the siphon rainwater hopper, and a plurality of water injection holes are formed in the position, close to the top, of the side wall of the protective cover along the circumferential direction; the top of the protective cover is provided with a water inlet pipe, and the bottom end of the water inlet pipe is fixedly connected with the top of the protective cover; a plurality of water inlet holes are formed in the circumferential direction on the side wall of the water inlet pipe; the top of the protective cover is also provided with a flow guide frame which is used for guiding rainwater entering from the water inlet pipe to the water injection hole and discharging the rainwater into the protective cover from the water injection hole; the side wall of the protective cover is also provided with a plurality of through holes along the circumferential direction, and the through holes are positioned below the water injection hole; the protective cover is also provided with an adjusting component for opening and closing the through hole.

On one hand, the traditional roof structure is generally a layer of structural plate, a roof siphon drainage system generally has requirements on the width and depth of a drainage ditch, particularly, a rainwater hopper needs to meet a certain depth to form the siphon system, the large building roof is provided with more counter beams, a double-layer plate structure is generally required to be designed, and the double-layer plate structure is difficult to meet the requirements on the depth of the roof drainage ditch and the rainwater hopper; according to the method, the upper plate is subjected to plate lowering and grooving, and the siphon rainwater hopper is arranged at the bottom of the drainage groove, so that the depth requirement of siphon is met; by adopting the technical scheme, the installation and use problems of the siphon drainage system of the roof with the double-layer structural plate are solved; on the other hand, the protective cover covers the outer part of the siphon rainwater hopper, and the protective cover shields the siphon rainwater hopper inside, so that the influence of external wind, wind and sunlight on dust accumulation and aging of the rainwater hopper is reduced; the top of the protective cover is provided with a water inlet pipe and a flow guide frame, so that the protective cover cannot influence the drainage of the rainwater hopper; the side wall of the protective cover is provided with a through hole, the protective cover is provided with an adjusting component for opening and closing the through hole, the adjusting component can open the through hole when the rainfall is large, rainwater can flow into the rainwater hopper from the water inlet pipe and also can flow into the rainwater hopper from the through hole on the side wall of the protective cover, a drainage path is increased, and the drainage efficiency is improved; in daily no rain, the through hole is sealed by the adjusting assembly, so that the rainwater hopper is protected from dust; furthermore, the arrangement of the through holes and the water inlet holes further realizes the filtering and blocking of large-volume impurities in rainwater, and reduces the influence of the impurities on the drainage of the rainwater hopper.

Preferably, the guide frame comprises an annular top plate sleeved on the water inlet pipe, and the annular top plate is fixedly connected with an opening at the top end of the water inlet pipe; a side plate is arranged around the edge of the outer ring of the annular top plate; the bottom end of the side plate is fixedly connected with an annular partition plate, the annular partition plate is sleeved on the protective cover, and the inner ring of the annular partition plate is fixedly connected with the outer side wall of the protective cover; the height of the annular partition plate is positioned between the water injection hole and the through hole on the uppermost layer.

By adopting the technical scheme, the annular top plate, the side plates and the annular partition plate in the diversion frame are mutually spliced with the pipe wall of the water inlet pipe and the protective cover to form a hollow communicating cavity, rainwater falls into the water inlet pipe, flows into the communicating cavity from the water inlet hole in the side wall of the water inlet pipe, then flows into the protective cover from the water injection hole in the top of the side wall of the protective cover under the blocking diversion of the top of the protective cover and the annular partition plate, and is finally discharged through the siphon rainwater hopper; the arrangement of the diversion frame realizes the diversion limiting effect on rainwater.

Preferably, the adjusting assembly comprises a light pipe sleeve sleeved outside the protective cover, the light pipe sleeve is connected with the protective cover in a sliding manner, and the inner side wall of the light pipe sleeve is abutted to the outer side wall of the side plate; the light pipe sleeve can float up and down along the vertical direction under the influence of buoyancy of accumulated water in the drainage groove; when the light pipe sleeve floats to the highest position, the through holes are exposed, and accumulated water in the drainage groove can flow into the protective cover through the through holes; when the light pipe sleeve falls back to the lowest position, the through holes are shielded by the light pipe sleeve.

By adopting the technical scheme, when rainwater accumulates in the drainage groove, the light pipe sleeve floats under the buoyancy action of accumulated water, the through holes are exposed at the moment, and the accumulated water in the drainage groove can flow into the protective cover through the through holes, so that drainage is accelerated, and the drainage efficiency is improved; when no rain weather exists, the light pipe sleeve is located at the lowest position, the through hole is shielded by the light pipe sleeve, and the light pipe sleeve protects the bottom and the side of the protective cover; the arrangement of the light pipe sleeve also realizes the automatic adjustment of the drainage work of the siphon rainwater hopper, and the structure is simple, fast and convenient.

Preferably, the bottom end of the light pipe sleeve is provided with light floating blocks at intervals along the circumferential direction, and the light floating blocks are fixedly connected with the inner side wall of the light pipe sleeve; the light floating block is connected with the protective cover in a sliding manner; when the upper surface of the light floating block is abutted against the lower surface of the annular partition plate, the light pipe sleeve is positioned at the highest position; when the lower surface of the light floating block is abutted against the bottom of the protective cover, the light pipe sleeve is located at the lowest position.

Through adopting above-mentioned technical scheme, the setting of light floater is light pipe sleeve and protection casing sliding connection's basis, and the light floater has still played the restriction effect when rising to light pipe sleeve, and the light pipe sleeve is difficult for slipping from the protection casing by the restriction of light floater and cyclic annular baffle.

Preferably, a fixed seat is arranged at the bottom of the protective cover in an extending manner, a fixed groove is formed in the position, corresponding to the fixed seat, of the lower layer plate, the fixed seat is clamped in the fixed groove, and the periphery of the fixed seat is fixed with the groove wall of the fixed groove in a sealing manner; the base plate of the siphon rainwater hopper is clamped in the fixed seat, and waterproof sealing paste is filled in a gap between the fixed seat and the base plate of the siphon rainwater hopper.

By adopting the technical scheme, the fixed seat is clamped in the fixed groove, and the chassis of the siphon rainwater hopper is clamped in the fixed seat, so that the connection stability of the protective cover and the siphon rainwater hopper with the bottom of the drainage groove is improved; waterproof sealing paste is filled in the gap between the fixing seat and the siphon rainwater hopper chassis, so that the waterproof sealing performance of the connecting part of the siphon rainwater hopper and the bottom of the drainage groove can be improved, and the problem of water leakage and water seepage is reduced.

Preferably, the top of the protective cover is provided with an inclined flow guide surface.

Through adopting above-mentioned technical scheme, the setting of slope water conservancy diversion face helps can follow the slope water conservancy diversion face fast and downflow to the water filling hole department of protection casing of rainwater that flows into the intercommunication chamber from the inlet tube lateral wall inlet opening, and then helps the rainwater to get into the realization in the protection casing fast and excrete, promotes hydrocone type drainage structures's work efficiency.

Preferably, one side of the upper layer plate, which is far away from the lower layer plate, is provided with a flow guide top plate; and one side end surface of the flow guide top plate, which is far away from the upper plate, is in an inverted V shape.

Through adopting above-mentioned technical scheme, the rainwater can follow the drainage tank that flows down fast on the water conservancy diversion roof V-arrangement inclined plane, and the drainage of roof rainwater is helped accelerating in being provided with of water conservancy diversion roof, promotes hydrocone type drainage structures's work efficiency.

Preferably, the depth of the drainage groove is 350-450mm, and the width of the drainage groove is 800-900mm.

By adopting the technical scheme, the roof siphon drainage system generally has requirements on the width and depth of the drainage groove, the siphon phenomenon is difficult to form due to too small groove depth, and the design layout of a double-layer roof structure can be influenced due to too large groove depth; the groove width is too narrow, so that the requirement of quick drainage when the amount of rainwater is abundant is difficult to meet; the utility model provides a water drainage tank size is suitable, satisfies siphon system's drainage requirement that not only can be fine, makes double-deck roofing structure's fluting area and design layout more reasonable moreover.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the upper plate is lowered to form the drainage groove, the siphon rainwater hopper is arranged at the bottom of the drainage groove, and the access hole is formed in the lower plate below the drainage groove, so that the depth requirement of siphon drainage is met, the problems of installation and use of the double-layer structural plate roof siphon drainage system are solved, and a new technical scheme is provided for installation and use of the double-layer structural plate roof siphon drainage system;

2. according to the rain cape, the protective cover covers the outer part of the siphon rain cape, and the siphon rain cape is covered by the protective cover, so that the influence of impurity accumulation and dust accumulation on the rain cape caused by external wind, sunshine and the like is reduced; the top of the protective cover is provided with a water inlet pipe and a flow guide frame, so that the protective cover cannot obstruct the drainage work of the rainwater hopper; the side wall of the protective cover is provided with the through hole and the adjusting component for opening and closing the through hole, so that the automatic adjustment of roof drainage and the protection of a rainwater hopper during daily non-drainage are realized; furthermore, the arrangement of the through hole in the side wall of the protective cover and the water inlet hole in the side wall of the water inlet pipe also realizes filtering and blocking of large-volume impurities in rainwater, and reduces the influence of the impurities on drainage of the rainwater hopper; this application sets up above-mentioned device in the rainwater fill outside, and then has realized the protection to the rainwater fill, helps solving the siphonic type rainwater fill and exists in the installation and use and be difficult to separation impurity and the easy laying dust problem of bucket body.

3. A fixed seat is arranged at the bottom of the protective cover in an extending mode, the fixed seat is clamped in a fixed groove which is concavely arranged on the lower layer plate, and the periphery of the fixed seat is hermetically fixed with the groove wall of the fixed groove; the base plate of the siphon rainwater hopper is clamped in the fixed seat, and waterproof sealing paste is filled in a gap between the fixed seat and the base plate of the siphon rainwater hopper; the fixing seat is beneficial to improving the connection stability between the siphon rainwater hopper and the protective cover and the bottom of the drainage groove on the one hand, and is also beneficial to improving the waterproof sealing performance of the joint, and the problem of water leakage and water seepage of the joint is reduced.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a sectional view of the entire structure of the embodiment of the present application.

Fig. 3 is a partially enlarged view of a in fig. 2.

Description of reference numerals:

1. an upper plate; 11. a flow guide top plate; 12. a water discharge tank; 2. a lower layer plate; 3. a siphonic rainwater hopper; 4. a protective cover; 41. a water injection hole; 42. a through hole; 43. a fixed seat; 44. waterproof sealing paste; 45. a water inlet pipe; 451. a water inlet hole; 46. a flow guiding frame; 461. an annular top plate; 462. a side plate; 463. an annular partition plate; 47. a lightweight pipe sleeve; 471. a light weight float block; 5. a connecting pipe; 6. a hanger tube; 7. a riser; 8. a drain pipe; 9. a building wall.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses double-deck structural slab roofing siphon drainage structures. Referring to fig. 1 and 2, the siphon drainage structure for the double-layer structural plate roof comprises an upper plate 1 and a lower plate 2, wherein a plurality of support beams are arranged between the upper plate 1 and the lower plate 2 at intervals; the drainage structure further comprises a plurality of siphon rainwater hoppers 3, a pipeline assembly communicated with the siphon rainwater hoppers 3 and a fixing assembly used for fixing a pipeline.

A flow guide top plate 11 is arranged on one side of the upper plate 1 far away from the lower plate 2; the end surface of one side of the diversion top plate 11, which is far away from the upper layer plate 1, is in an inverted V shape; a plurality of drainage grooves 12 are concavely arranged on the upper plate 1 along the length direction at intervals, the depth of each drainage groove 12 is 350-450mm, and the width of each drainage groove 12 is 800-900mm; the depth of the drainage channel 12 in the embodiment of the application is set to be 450mm, and the width is 800mm. A mounting opening is formed in the center of the bottom of the drainage groove 12, the siphon rainwater hoppers 3 are respectively positioned in the mounting openings, and the siphon rainwater hoppers 3 are detachably connected with the drainage groove 12; the lower layer plate 2 is provided with an access hole corresponding to the lower position of the drainage groove 12, and the aperture of the access hole is 800 multiplied by 800mm.

The pipeline assembly comprises a connecting pipe 5, a hanging pipe 6, a vertical pipe 7 and a drain pipe 8 which are mutually communicated, the connecting pipe 5, the hanging pipe 6, the vertical pipe 7 and the drain pipe 8 are all made of high-density polyethylene (HDPE) pipes, and one end of the connecting pipe 5 penetrates through the access hole and is connected with the bottom of the siphon rainwater hopper 3 through an electric welding pipe hoop; a suspension pipe 6 is arranged below the lower layer plate 2, and one end of the connecting pipe 5, which is far away from the siphon rainwater hopper 3, is communicated with the suspension pipe 6; the fixing component comprises a guide rail parallel to the hanging pipe 6 and a plurality of connecting pieces, and the connecting pieces comprise hanging screws, hanging pipe clamps, sliding pipe clamps and the like; the guide rail is fixedly connected with the lower layer plate 2 through a plurality of suspension screws; the suspension pipe 6 is fixedly connected with the guide rail through a plurality of suspension pipe clamps; one end of the vertical pipe 7 is communicated with the hanging pipe 6, and the other end extends downwards and passes through the indoor ground to be communicated with an underground drainage pipe 8; the vertical pipe 7 is fixedly connected with a building wall 9 through a plurality of sliding pipe clamps; the drain pipe 8 penetrates out of the room and is communicated with an outdoor rainwater pipe network. When raining, the rainwater is drained from the roof to the outside of the house along the mutually communicated pipeline components from the siphon rainwater hopper 3.

Referring to fig. 2 and 3, a protective cover 4 is covered outside the siphon rainwater hopper 3, and a gap for rainwater to flow into is left between the protective cover 4 and the siphon rainwater hopper 3. The protection casing 4 top is provided with inlet tube 45, and the cylinder pipe is chooseed for use to inlet tube 45 in this application, and inlet tube 45 also can select for use square pipe etc. in other embodiments. The water inlet pipe 45 extends along the vertical direction, one end of the water inlet pipe 45 is fixedly connected with the upper surface of the bottom of the protective cover 4, and the top flat plate of the protective cover 4 seals the opening at one end of the water inlet pipe 45; a plurality of water inlet holes 451 are arranged on the side wall of the water inlet pipe 45 along the circumferential direction. The top of the protective cover 4 is further provided with a flow guide frame 46 for guiding rainwater entering from the water inlet pipe 45 into the protective cover 4, the flow guide frame 46 comprises an annular top plate 461 sleeved on the water inlet pipe 45, and the edge of the inner ring of the annular top plate 461 is fixedly connected with the opening at the top end of the water inlet pipe 45; a side plate 462 is fixedly enclosed at the outer ring edge of the annular top plate 461, and an annular partition 463 is fixedly connected to the bottom end of the side plate 462; the annular partition 463 is sleeved on the protective cover 4, and the diameter of the outer ring of the annular partition 463 is equal to that of the annular top plate 461; the inner ring of the annular clapboard 463 is fixedly connected with the outer side wall of the protective cover 4; a plurality of water injection holes 41 are formed in the side wall of the protective cover 4 along the circumferential direction at positions corresponding to the upper part of the annular partition 463; the top plate at the top of the protective cover 4 is also provided with an inclined flow guide surface.

The annular top plate 461, the side plate 462 and the annular partition plate 463 of the diversion frame 46 are mutually spliced with the pipe wall of the water inlet pipe 45 and the protective cover 4 to form a hollow communicating cavity, rainwater enters the water inlet pipe 45 and is blocked by the top plate of the protective cover 4, and only can flow into the communicating cavity from the water inlet on the side wall of the water inlet pipe 45, then flows downwards to the water injection hole 41 along the inclined diversion surface, then flows into the protective cover 4 from the water injection hole 41, and is finally discharged by the siphon rainwater hopper 3. The arrangement that the water inlet hole 451 and the diversion frame 46 are formed in the side wall of the water inlet pipe 45 is helpful to reduce the entering of external dust and impurities into the protective cover 4, and then the siphon-type rainwater hopper 3 in the protective cover 4 can be protected and blocked.

Referring to fig. 3, a plurality of through holes 42 are circumferentially formed in the side wall of the protection cover 4 corresponding to the lower portion of the annular partition 463, and an adjusting assembly for opening and closing the through holes 42 is further disposed outside the protection cover 4. The adjusting component comprises a light pipe sleeve 47 sleeved outside the protective cover 4, and the inner side wall of the light pipe sleeve 47 is abutted with the outer side wall of the side plate 462; a plurality of light floating blocks 471 are arranged at the bottom of the light pipe sleeve 47 at intervals along the circumferential direction, and the light floating blocks 471 are fixedly connected with the inner side wall of the light pipe sleeve 47; the light floating block 471 and the light pipe sleeve 47 are connected with the protective cover 4 in a sliding mode, and the light floating block 471 and the light floating block 47 can float up and down in the vertical direction under the influence of buoyancy of accumulated water in the drainage groove 12. When the water accumulation amount in the roof drainage tank 12 is large, the light floating block 471 drives the light pipe sleeve 47 to float upwards, when the upper surface of the light floating block 471 is abutted with the lower surface of the annular partition plate 463, the light pipe sleeve 47 floats upwards to the highest position, the through holes 42 are exposed at the moment, and the accumulated water in the drainage tank 12 can flow into the protective cover 4 through the through holes 42, so that the roof drainage can be accelerated; when no rain weather exists, the lower surface of the light float 471 abuts against the bottom of the protective cover 4, the light pipe sleeve 47 is located at the lowest position, the top of the light pipe sleeve 47 is flush with the annular top plate 461, a gap is reserved between the bottom of the light pipe sleeve 47 and the bottom of the protective cover 4, the through holes 42 are shielded by the light pipe sleeve 47, and the light pipe sleeve 47 prevents external dust and impurities from entering the protective cover 4.

A circle of fixing seat 43 extends from the bottom of the protective cover 4, a fixing groove is formed in the lower plate 2 corresponding to the fixing seat 43, the fixing seat 43 is clamped in the fixing groove, and the periphery of the fixing seat 43 is fixed with the groove wall of the fixing groove in a sealing mode; the upper surface of the fixed seat 43 is flush with the upper surface of the lower plate 2; the edge of the chassis of the siphon rainwater hopper 3 is clamped in the fixed seat 43, and a gap between the fixed seat 43 and the chassis of the siphon rainwater hopper 3 is filled with waterproof sealing paste 44. The fixing seat 43 and the waterproof sealing paste 44 are used for improving the connection stability between the siphon rainwater hopper 3 and the bottom of the drainage groove 12 and improving the waterproof sealing performance of the joint and reducing the water seepage and leakage at the joint.

The embodiment of the application provides a double-deck structural slab roofing siphon drainage structures's implementation principle does: when the rain does not appear, the siphon rainwater hopper 3 is hidden in the protective cover 4, so that the phenomenon that external impurities, dust and the like enter the siphon rainwater hopper 3 under the blocking of the protective cover 4 and the light pipe sleeve 47 is reduced, and the problems that the impurities are difficult to block and the rainwater hopper body is easy to accumulate during the installation and the use of the siphon rainwater hopper 3 are solved; when raining, rainwater is quickly gathered in the plurality of drainage grooves 12 through the diversion of the diversion top plate 11, on one hand, the rainwater falls into the water inlet pipe 45 and flows into the communication cavity from the water inlet hole 451 on the side wall of the water inlet pipe 45, and then enters the protective cover 4 through the water inlet hole 41 on the upper part of the side wall of the protective cover 4; on the other hand, when the drainage channel 12 accumulates more rainwater, the lightweight pipe sleeve 47 and the lightweight float 471 are influenced by the buoyancy of the water to rise, the through hole 42 of the side wall of the protection cover 4 is exposed, and the rainwater can enter the protection cover 4 through the through hole 42; rainwater entering the protective cover 4 is filtered through the water inlet hole 451, the water injection hole 41 and the through hole 42, large-volume impurities in the rainwater are blocked outside the protective cover 4, the filtered rainwater flows into the connecting pipe 5 through the siphon rainwater hopper 3, the rainwater in the connecting pipes 5 is collected by the suspension pipe 6 and flows into the vertical pipe 7, and then is discharged into the underground drain pipe 8 through the vertical pipe 7 and finally is discharged to an outdoor rainwater pipe network for collection and treatment.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A siphon drainage structure of a double-layer structural slab roof comprises a plurality of siphon rainwater hoppers (3), a pipeline assembly and a fixing assembly for fixing a pipeline; the method is characterized in that: the water-saving floor board is characterized by further comprising an upper board (1) and a lower board (2), wherein a plurality of supporting beams are arranged between the upper board (1) and the lower board (2) at intervals, and the upper board (1) is concavely provided with drainage grooves (12) at intervals along the length direction; the siphon rainwater hopper (3) is fixedly arranged at the bottom of the drainage groove (12); an access hole is formed in the position, corresponding to the drainage groove (12), of the lower layer plate (2), and the bottom of the siphon rainwater hopper (3) penetrates through the bottom of the drainage groove (12) and is communicated with the pipeline assembly;

a protective cover (4) is arranged outside the siphon rainwater hopper (3), and a plurality of water injection holes (41) are formed in the position, close to the top, of the side wall of the protective cover (4) along the circumferential direction; a water inlet pipe (45) is arranged at the top of the protective cover (4), and the bottom end of the water inlet pipe (45) is fixedly connected with the top of the protective cover (4); a plurality of water inlet holes (451) are formed in the side wall of the water inlet pipe (45) along the circumferential direction; the top of the protective cover (4) is also provided with a flow guide frame (46) which is used for guiding rainwater entering from the water inlet pipe (45) to the water injection holes and discharging the rainwater into the protective cover (4) from the water injection holes; the side wall of the protective cover (4) is also provided with a plurality of through holes (42) along the circumferential direction, and the through holes (42) are positioned below the water injection hole; the protective cover (4) is also provided with an adjusting component for opening and closing the through hole (42).

2. The siphon drainage structure for double-layer structural plate roof as claimed in claim 1, wherein: the flow guide frame (46) comprises an annular top plate (461) sleeved on the water inlet pipe (45), and the annular top plate (461) is fixedly connected with an opening at the top end of the water inlet pipe (45); a side plate (462) is arranged around the edge of the outer ring of the annular top plate (461); the bottom end of the side plate (462) is fixedly connected with an annular partition plate (463), the annular partition plate (463) is sleeved on the protective cover (4), and the inner ring of the annular partition plate (463) is fixedly connected with the outer side wall of the protective cover (4); the height of the annular partition (463) is located between the water injection hole (41) and the through hole (42) of the uppermost layer.

3. The siphon drainage structure for double-layer structural plate roof as claimed in claim 2, wherein: the adjusting assembly comprises a light pipe sleeve (47) sleeved outside the protective cover (4), the light pipe sleeve (47) is connected with the protective cover (4) in a sliding mode, and the inner side wall of the light pipe sleeve (47) is abutted to the outer side wall of the side plate (462); the light pipe sleeve (47) can float up and down along the vertical direction under the influence of buoyancy of accumulated water in the drainage groove (12); when the light pipe sleeve (47) floats to the highest position, the through holes (42) are exposed, and accumulated water in the drainage groove (12) can flow into the protective cover (4) through the through holes (42); when the light-weight pipe sleeve (47) falls back to the lowest position, the through holes (42) are shielded by the light-weight pipe sleeve (47).

4. The siphon drainage structure for double-layer structural panel roof as claimed in claim 3, wherein: the bottom end of the light pipe sleeve (47) is provided with light floating blocks (471) at intervals along the circumferential direction, and the light floating blocks (471) are fixedly connected with the inner side wall of the light pipe sleeve (47); the light floating block (471) is in sliding connection with the protective cover (4); when the upper surface of the light floating block (471) is abutted with the lower surface of the annular partition plate (463), the light pipe sleeve (47) is at the highest position; when the lower surface of the light floating block (471) is abutted with the bottom of the protective cover (4), the light pipe sleeve (47) is at the lowest position.

5. The siphon drainage structure for double-layer structural plate roof as claimed in claim 1, wherein: a fixed seat (43) is arranged at the bottom of the protective cover (4) in an extending mode, a fixed groove is formed in the position, corresponding to the fixed seat (43), of the lower layer plate (2), the fixed seat (43) is clamped in the fixed groove, and the periphery of the fixed seat (43) is fixed with the groove wall of the fixed groove in a sealing mode; the base plate of the siphon rainwater hopper (3) is clamped in the fixed seat (43), and waterproof sealing paste (44) is filled in a gap between the fixed seat (43) and the base plate of the siphon rainwater hopper (3).

6. The siphon drainage structure for double-layer structural plate roof as claimed in claim 1, wherein: the top of the protective cover (4) is provided with an inclined flow guide surface.

7. The siphon drainage structure for double-layer structural plate roof as claimed in claim 1, wherein: a flow guide top plate (11) is arranged on one side of the upper plate (1) far away from the lower plate (2); the end face of one side, far away from the upper plate (1), of the flow guide top plate (11) is in an inverted V shape.

8. The siphon drainage structure for double-layer structural panel roof as claimed in claim 1, wherein: the depth of the drainage groove (12) is 350-450mm, and the width is 800-900mm.

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