A suspended siphon drainage system

Abstract

The present invention discloses a suspended siphon drainage system, including a rain gutter, a suspended transverse pipe and a main drainage riser. There are multiple rain gutter, each rain gutter is provided with a connecting pipe connected to the suspension transverse pipe at the bottom, an auxiliary drainage riser is provided between two adjacent rain gutter, the upper opening end of the auxiliary drainage riser is connected to the suspension transverse pipe, and a stop valve is provided at the upper opening end of each auxiliary drainage riser. Compared with the prior art, the suspended siphon drainage system provided by the present invention forms multiple vertical drainage channels by providing multiple auxiliary drainage risers, and can quickly form a siphon phenomenon when the water volume is small, thereby improving the drainage capacity of the system.

Description

Technical Field

[0001] The invention relates to a siphon drainage system, in particular to a suspended siphon drainage system. Background Art

[0002] Roof drainage is an important part of building drainage. For the entire rainwater drainage system, the number and diameter of the drainage pipes determine whether the rainwater can be discharged smoothly. The siphon drainage system is a commonly used roof drainage system. It uses the effective potential difference between the rainwater bucket and the drainage pipe as the power to generate negative pressure inside the system. The siphon drainage system uses the height of the building and the potential energy of falling water to create a local vacuum in the pipe, so that the water flow in the rainwater bucket and the horizontal pipe obtains additional pressure to form a siphon phenomenon. The siphon effect is used to greatly accelerate the flow rate of water in the drainage pipe and quickly discharge the rainwater from the roof. The siphon drainage system forms a full pipe flow without a slope in the horizontal pipe, and drains the accumulated water on the roof at a very fast speed.

[0003] The existing siphon drainage system is generally designed according to the principle of full pipe pressure flow. Through the simulation dynamic balance study of the siphon drainage system, it is found that the system design and actual rainfall have a great influence on the drainage performance of the siphon drainage system. The flow state of the water flow in the system pipe changes between full pipe flow and two-phase flow. When the mixing degree of the fluid and air in the pipe reaches 60%, a stable siphon phenomenon will occur. Once the siphon is formed, the drainage capacity of the system is greatly enhanced. The study found that in the early stage of rainfall and when the rainfall is small, due to the small amount of water entering the siphon drainage system pipe, the rainwater in the siphon drainage system pipe is a non-full pipe flow, and the system is actually in a gravity flow state. The drainage riser of the siphon drainage system directly affects the drainage capacity of the system pipe. In order to make the siphon drainage system quickly siphon, the existing technology generally sets a smaller drainage riser pipe diameter. This setting can increase the full load of the fluid in the drainage pipe, but the small pipe diameter will also cause the drainage volume per unit time of the siphon drainage system to decrease, and the drainage capacity is poor. However, if a larger diameter of the drainage riser is set, at the beginning of rainfall or when the rainfall is small, the air in the drainage pipe will increase greatly when the system water inflow is small, and the siphon phenomenon cannot be formed quickly, and the system drainage capacity will also be poor. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art that the use of small-diameter drainage risers in the siphon drainage system will lead to a decrease in the drainage volume per unit time of the siphon drainage system, and that the use of large-diameter drainage risers will make it difficult to form a siphon at the beginning of rainfall or when the rainfall is small, and the system has poor drainage capacity. A suspended siphon drainage system is provided, which forms a plurality of vertical drainage channels by arranging a plurality of auxiliary drainage risers, and by arranging a stop valve on the auxiliary drainage pipe, and using the stop valve to adjust the number of auxiliary drainage pipes to be opened and closed, so that even at the beginning of rainfall or when the rainfall is small, when the system water inflow is small, a siphon phenomenon can be quickly formed, thereby improving the drainage capacity of the system.

[0005] The purpose of the present invention is mainly achieved through the following technical solutions:

[0006] A suspended siphon drainage system comprises a rain gutter, a suspension transverse pipe and a main drainage riser. There are multiple rain gutter, and a connecting pipe connected to the suspension transverse pipe is provided at the bottom of each rain gutter. An auxiliary drainage riser is provided between two adjacent rain gutter, and the upper opening end of the auxiliary drainage riser is connected to the suspension transverse pipe. A stop valve is provided at the upper opening end of each auxiliary drainage riser. The stop valve comprises a rotating shaft, a first torsion spring, a rotating cover plate and a limit block. The rotating shaft is arranged on the lower inner wall of the suspension transverse pipe for rotation along a direction perpendicular to the horizontal plane. One end of the first torsion spring is fixed to the lower section of the rotating shaft, and the other end of the first torsion spring is fixed to the lower inner wall of the suspension transverse pipe. The rotating cover plate matches the upper opening end of the auxiliary drainage riser, and the end of the rotating cover plate is fixed to the side wall of the rotating shaft. The limit block is arranged on the lower inner wall of the suspension transverse pipe, and a first rotating blade is also provided on the side wall of the rotating shaft. When in use, the rotating shaft rotates to rotate the first rotating blade to contact the limit block.

[0007] The drainage riser of the siphon drainage system directly affects the drainage capacity of the system pipeline. In order to make the siphon drainage system quickly siphon, the existing technology generally sets a smaller drainage riser diameter. This setting can increase the fluid load degree in the drainage pipe, but the small diameter will also cause the drainage volume per unit time of the siphon drainage system to decrease, and the drainage capacity is poor; but if a larger drainage riser diameter is set, at the beginning of rainfall or when the rainfall is small, the air in the drainage pipe will increase greatly when the system water inlet is small, and the siphon phenomenon cannot be formed quickly, and the system drainage capacity is also poor. In this technical solution, multiple auxiliary drainage risers are added to the suspended transverse pipe, and a stop valve is set at the open end of the auxiliary drainage riser. When the rainfall is large and the amount of water entering the system is large, the stop valve is adjusted to open the open ends of the multiple auxiliary drainage risers, forming multiple vertical drainage channels with the main drainage riser, which greatly increases the unit flow of rainwater in the drainage system. The setting of multiple vertical drainage channels will also accelerate the flow rate of rainwater in the suspended transverse pipe, greatly increasing the drainage volume per unit time of the siphon drainage system; when it is the initial stage of rainfall or the rainfall is small, the water inflow in the system is small, and the stop valve is adjusted to close the multiple auxiliary drainage risers, and the vertical drainage channels are reduced, so that the suspended transverse pipe and the vertical drainage channel can form full pipe flow more easily, quickly form a siphon phenomenon, and improve the drainage capacity of the system. In this technical solution, multiple auxiliary drainage risers are set to form multiple vertical drainage channels, and a stop valve is set on the auxiliary drainage pipe. The stop valve is used to adjust the number of auxiliary drainage risers to be opened and closed. Even in the initial stage of rainfall or the rainfall is small, when the system has a small amount of water inflow, a siphon phenomenon can be quickly formed, thereby improving the drainage capacity of the system. The use of a motor to control the opening and closing of the stop valve requires a judgment of the water intake in the system, and then determines the vertical drainage channel suitable for the current water intake. This requires a complex water volume judgment and motor control structure, which is not only complex in structure, but also prone to erroneous operation due to misjudgment during use. For this reason, the inventor studied the relationship between the water volume and the vertical drainage channel and the siphon effect in the siphon drainage system of the present technical solution and found that the water volume in the siphon drainage system can directly reflect the flow rate of rainwater in the suspended horizontal pipe. When the rainwater flow rate is large, increasing the vertical drainage channel can increase the drainage capacity of the system. When the rainwater flow rate is small, reducing the vertical drainage channel is conducive to forming a full pipe flow and quickly forming a siphon phenomenon, thereby improving the drainage capacity of the system. To this end, the inventor set the stop valve as a rotating shaft structure that rotates with the flow rate of water, set the rotating shaft on the inner wall of the suspension cross pipe, and connect the bottom of the rotating shaft to the inner wall of the suspension cross pipe through a first torsion spring. When water flows in the suspension cross pipe, the water flow pushes the first rotating blade on the rotating shaft to drive the rotating shaft to rotate, and the rotating cover plate rotates with the rotating shaft to expose the upper opening end of the auxiliary drainage riser.In the technical solution, multiple auxiliary drainage risers are provided. Since a rainwater gutter is provided between any two auxiliary drainage risers, even if multiple auxiliary drainage risers provided along the water flow direction are blocked, more rainwater gutter provided in front of the auxiliary drainage risers located behind the water flow will introduce rainwater. Since rainwater will enter the suspended transverse pipe from the rainwater gutter, that is, when the open ends of all auxiliary drainage risers are closed, the rainwater entering from the rainwater gutter will be greater than the water flow rate and flow velocity in the auxiliary drainage risers located behind them, that is, the water flow velocity of the suspended transverse pipe at the auxiliary drainage riser located behind the water flow will be greater than the water flow velocity of the suspended transverse pipe at the auxiliary drainage riser located in front of the water flow. Flow rate, therefore, the water flow thrust received by the stop valve at the rear will be greater than that received by the water flow valve at the front. By setting the elastic coefficient of the first torsion spring, when subjected to the water flow thrust, multiple stop valves arranged along the water flow direction can be opened in sequence from the rear to the front. When the number of open stop valves reaches a balance with the water flow rate, the stop valve no longer opens. It can be seen that the stop valve arrangement using the present technical solution can not only realize the control of the closure of the open end of the auxiliary drainage riser, but also realize the gradual opening from the back to the front, until the siphon drainage system of the present technical solution reaches the ideal flow rate and flow, thereby greatly increasing the drainage capacity of the system.

[0008] It should be noted that the stop valve in the technical solution also includes a motor for controlling the rotation of the shaft, a bearing is provided on the lower side wall of the suspension transverse tube, the bottom of the shaft is arranged on the inner ring of the bearing, and a motor for driving the inner ring of the bearing to rotate is provided on the outer side wall of the suspension transverse tube. The use of a motor to control the rotation of the shaft can be used as a control means for opening and closing the stop valve in the technical solution, and can also be used as an auxiliary technical solution for opening and closing the stop valve by using the water flow speed in the technical solution. When the siphon drainage system is used in a special environment with complex water flow so that the structure inside the stop valve cannot be used normally, the stop valve can be maintained by starting the motor to control the rotation of the shaft. It should be noted that the diameter of the suspension transverse tube used in the technical solution is relatively small, so that it is easier to form a full pipe flow in the suspension transverse tube, which can quickly form a siphon phenomenon, speed up the drainage flow rate, and increase the drainage volume per unit time of the system. The inventor found through research that the diameter of the suspension transverse tube used in the existing siphon drainage system is generally DN50-100, while the diameter of the suspension transverse tube can be reduced by 15%-50% by using the siphon drainage system in the technical solution, and a full pipe flow can be quickly formed. The full pipe flow described in the present technical solution refers to the flow rate when the mixing degree of the fluid and air in the pipe is above 60% and a stable siphon phenomenon can occur. A baffle matching the outer rain gutter is provided at the upper open end of the rain gutter, and a plurality of water holes are opened on the baffle so that the baffle forms a plurality of grids. Preferably, in the present technical solution, the horizontal distances between the two connecting pipes arranged in sequence along the water flow direction in the suspended transverse pipe and the auxiliary drainage riser located in the middle are l and L respectively, where l≤1 / 2L; the inventor found in the course of research that since multiple rainwater hoppers will inject rainwater into the suspended transverse pipe, when all the auxiliary drainage risers are opened, the water in the suspended transverse pipe will flow into the auxiliary drainage riser first. If the distance between the auxiliary drainage riser and the next connecting pipe along the water flow direction is set too close, if the water flow in the connecting pipe is large, the water flowing in from the connecting pipe is likely to partially flow back to the auxiliary drainage riser in the opposite direction of the water flow in the suspended transverse pipe, resulting in the suspension. Turbulence is generated in the suspended transverse pipe, which reduces the flow velocity of the water in the suspended transverse pipe and even disrupts the siphon drainage, thereby affecting the drainage capacity of the system. For this reason, the inventor has repeatedly tested the setting position of the auxiliary drainage riser and found that when the horizontal distances between the two connecting pipes arranged in sequence along the water flow direction in the suspended transverse pipe and the auxiliary drainage riser located in the middle are l and L respectively, where l≤1 / 2L, even if the unit water flow in the connecting pipe is greater than the unit water flow in the suspended transverse pipe, the water in the connecting pipe will not flow back to the auxiliary drainage riser in the opposite direction of the water flow in the suspended transverse pipe. Under this setting, the drainage system can be used stably and the drainage capacity will not be reduced in different environments. The technical solution can control the deformation of the first torsion spring only when the water flow velocity reaches a certain flow velocity through the selection of the elastic coefficient of the first torsion spring, that is, when the water flow velocity of the suspended transverse pipe is small, the force of the water flow on the first torsion spring is not enough to cause the first torsion spring to deform. Only when the water flow velocity is large, the force of the water flow on the first torsion spring is sufficient to cause the first torsion spring to deform.

[0009] Furthermore, an arc-shaped locking plate coaxial with the rotating shaft is provided on the inner wall of the lower side of the suspension cross tube, and a plurality of blocks are provided on the inner wall along the circumference of the arc-shaped locking plate. A lever cooperating with the block is provided on the side wall of the rotating shaft, and the end of the lever is fixed to the side wall of the rotating shaft by a third torsion spring.

[0010] The technical solution is provided with an arc-shaped lock plate, and a lever cooperating with a block on the rotating shaft is provided on the arc-shaped lock plate. With the rotation of the rotating shaft, the block on the rotating shaft sequentially contacts with multiple levers along its axial direction. Since the end of the lever is fixed to the side wall of the rotating shaft through a third torsion spring, when the block contacts a lever, the lever will be subjected to the force of the third torsion spring, thereby blocking the rotation of the rotating shaft. Only when the water flow velocity is further increased, the third torsion spring can be deformed, so that the rotating shaft continues to rotate until the block is out of contact with the lever, and the rotating shaft continues to rotate. It can be seen that the technical solution increases the resistance to the rotation of the rotating shaft through the levers and blocks that cooperate with each other, and the increase in resistance is the point resistance brought by the multiple levers arranged along the circumference of the arc-shaped lock plate, that is, the increased resistance will be encountered only when the lever contacts the block. The technical solution realizes the step-by-step adjustment of the rotation angle of the rotating shaft through this arrangement, so as to realize the step-by-step control of the opening degree of the auxiliary drainage riser pipe, and realize the quantitative adjustment of the drainage volume of the auxiliary drainage riser. When water in the system stops flowing or the water flow rate decreases, the first torsion spring is reset to drive the rotating shaft to reset. Since the force generated by the recovery deformation of the first torsion spring is greater than the force of the third torsion spring, and when the lever contacts the block as the rotating shaft is reset, the resistance generated by the third torsion spring is less than the force when the lever rotates. Therefore, the force generated by the third torsion spring when the lever is reset as the rotating shaft is reset will not affect the reset of the lever.

[0011] Furthermore, a plurality of arc-shaped partitions are provided inside the auxiliary drainage riser along its axial direction, and the plurality of arc-shaped partitions divide the auxiliary drainage riser into a plurality of sub-drainage risers; during the rotation of the rotating cover plate around the rotating shaft, the lever contacts with a plurality of blocks in sequence along the rotation direction of the rotating shaft, and when the lever contacts with any one of the blocks, a side surface of an arc-shaped partition in the auxiliary drainage riser is in the same vertical direction as the side wall of the rotating cover plate.

[0012] In order to further achieve quantitative adjustment of the auxiliary drainage riser, the technical solution divides the auxiliary drainage riser into multiple sub-drainage risers by setting multiple arc-shaped partitions, and when the lever contacts any block, the side of an arc-shaped partition in the auxiliary drainage riser is in the same vertical direction as the side wall of the rotating cover, that is, when the lever cooperates with any block, the dividing line formed by the rotating cover and the auxiliary drainage riser is in the same vertical direction as the arc-shaped partition. The technical solution achieves quantitative adjustment of the drainage volume of the auxiliary drainage riser by setting an arc-shaped partition to cooperate with the rotating cover to rotate and adjust the inner diameter of the auxiliary drainage riser.

[0013] Furthermore, the rain gutter includes an outer bucket body and an inner bucket body sleeved in the outer bucket body, a first through hole is opened on the bottom surface of the outer bucket body, a connecting pipe passes through the first through hole and extends upward, a second bearing is arranged on the outer sleeve of the connecting pipe extension section, the bottom of the inner bucket body is arranged on the outer ring of the second bearing, a second through hole is opened on the bottom surface of the inner bucket body, the open end of the connecting pipe extension section is connected with the second through hole, a plurality of baffles are arranged on the inner wall of the inner bucket body, and a plurality of second rotating blades are arranged on the outer wall of the inner bucket body. When in use, water flow impacts the second rotating blades to rotate the inner bucket body, and the rotation direction of the inner bucket body is opposite to the direction of the vortex in the inner bucket body; a plurality of third through holes are also opened on the bottom surface of the outer bucket body, and the plurality of third through holes are evenly distributed between the second through hole and the inner wall of the outer bucket body, a fourth through hole is opened on the side wall of the connecting pipe, and the fourth through hole is connected with the third through hole through a pipeline.

[0014] In order to further promote the drainage capacity of the siphon drainage system, the present technical scheme has improved the rainwater gutter of the system. Since achieving full pipe flow in the pipe in the siphon drainage system is the key to drainage, and the air content in the pipe directly affects whether the pipe can achieve full pipe flow, in daily siphon drainage, since the water flowing into the rainwater gutter is easy to form a vortex, a large amount of air will enter the pipe with the vortex, making it difficult for the pipe to form a full pipe flow. Therefore, according to the rotation angle of the vortex in the inner bucket, the present technical scheme sets a second rotating blade to make the inner bucket body rotate in the opposite direction along the vortex rotation angle, and reduces the vortex formed by rainwater in the inner bucket through the reverse rotation of the inner bucket body, reduces the air entering the pipe due to the vortex, is conducive to the formation of the siphon phenomenon, and improves the drainage capacity of the system; in order to further promote the reduction of the vortex, the present technical scheme sets a plurality of baffles in the inner bucket body, and when the inner bucket body rotates, the baffles can prevent the formation of the vortex. It should be noted that due to the rotation of the earth, the vortices in the northern and southern hemispheres rotate in different directions. The vortices in the northern hemisphere generally rotate counterclockwise, while the vortices in the southern hemisphere generally rotate clockwise. Therefore, when setting the second rotating blade, it is necessary to set the second rotating blade according to the rotation direction of the vortex in the rain bucket. The technical solution can achieve different rotation directions by tilting the second rotating blade on the outer wall of the inner bucket body and adjusting the tilt angle.

[0015] Furthermore, a plurality of second rotating blades are evenly distributed in two circles on the outer side wall of the inner bucket body along the circumference thereof, and a plurality of first protrusions and a plurality of second protrusions are evenly distributed on the inner side wall of the outer bucket body along the circumference thereof. The circle formed by the plurality of first protrusions is opposite to the circle of second rotating blades located above, and the circle formed by the plurality of second protrusions is opposite to the circle of second rotating blades located below, and the gap between the first protrusions and the outer side wall of the inner bucket body is larger than the gap between the second protrusions and the outer side wall of the inner bucket body.

[0016] This technical solution sets two circles of second blades to speed up the rotation speed of the inner bucket, further reducing the impact on the formation of vortices in the inner bucket. In order to prevent air from entering the pipeline from the gap between the inner and outer buckets, this technical solution sets two circles of protrusions in the outer bucket to reduce the gap between the outer bucket and the second blade. When the second blade starts to rotate, rainwater flows between the inner and outer buckets, and air is not easy to enter the pipeline from the gap. In addition, this technical solution also sets the second protrusion to be thicker than the first protrusion, so that the gap between the inner and outer buckets is larger at the top and smaller at the bottom. When water flows from the larger gap to the smaller gap, rainwater is more likely to fill the small gap, preventing air from entering the pipeline. Preferably, the two circles of second blades are staggered.

[0017] Furthermore, on the same horizontal plane, the diameter of the outer bucket body is D, the diameter of the inner bucket body is d, and 2 / 3D≤d≤7 / 8D.

[0018] After studying the siphon drainage system of the present technical solution, the inventor found that when the diameter of the outer bucket and the inner bucket is set to 2 / 3D≤d≤7 / 8D, the rotation of the inner bucket has the greatest interference effect on the formation of the vortex, and the amount of air that can enter the pipeline from the inner and outer buckets is the least. When the diameter of the inner bucket is less than 2 / 3 of the diameter of the outer bucket, the gap between the inner and outer buckets is too large, and a large amount of water flows in from the gap, resulting in insufficient water in the inner bucket. Although the inner bucket rotates quickly and is not easy to generate a vortex, the amount of air mixed in the water flowing into the pipeline from the inner bucket is large due to the small amount of water in the inner bucket, and the air content in the water flowing in from the outer bucket will also increase, resulting in an increase in the air content in the pipeline. When the diameter of the inner bucket is greater than 7 / 8 of the diameter of the outer bucket, the gap between the inner and outer buckets is too small, the rotation effect of the inner bucket is poor, and the interference effect on the vortex in the inner bucket is poor, resulting in an increase in the air content in the pipeline. When the diameters of the outer bucket and the inner bucket are set to 2 / 3D≤d≤7 / 8D, the effect of rainwater flowing into the rainwater gutter is best, and a siphon phenomenon can be formed quickly, thereby improving the drainage capacity of the system.

[0019] Furthermore, the gap between the outer wall of the inner bucket body and the inner wall of the outer bucket body gradually decreases from top to bottom.

[0020] In this technical solution, the gap between the outer wall of the inner bucket and the inner wall of the outer bucket is gradually reduced from top to bottom, so that the gap between the inner and outer buckets is larger at the top and smaller at the bottom. When water flows from the larger gap to the smaller gap, rainwater can more easily fill the small gap, preventing air from entering the pipe, which can quickly form a siphon phenomenon and improve the drainage capacity of the system.

[0021] Furthermore, a plurality of filter tubes extending downward are provided on the lower inner wall of the suspended horizontal tube along the axial direction thereof, the lower end of the filter tube is closed, a filter screen is provided on the inner wall of the filter tube, an impeller is provided at the bottom of the filter tube, the impeller is located below the filter screen, a first bearing is provided at the bottom of the filter tube, the bottom of the impeller shaft is provided on the inner ring of the first bearing, a motor for driving the inner ring of the first bearing to rotate is provided on the outer wall of the bottom of the filter tube, and an annular protrusion is provided on the inner wall of the filter tube above the filter screen along the circumference of the filter tube.

[0022] In addition to the amount of water in the pipe, the factors that affect the drainage capacity of the siphon drainage system are that when the siphon drainage system discharges rainwater, it is easy for sediment to enter the system along the water and deposit in the pipe, affecting the water flow in the system. The sediment deposited in the water will change the water flow fluctuation in the pipe, easily causing water jumps, turbulent water flow, water vapor impact flow, changing the full pipe flow state in the pipe, and reducing the drainage capacity of the system. In order to solve this problem, the technical solution is to set a plurality of filter tubes on the suspension transverse tube, and to set a filter impeller structure in the filter tube. When the impeller rotates, due to the vortex generated by the rotation of the impeller, the water flows from the suspension transverse tube to the filter tube, and the silt in the water is filtered through the filter screen and deposited on the filter screen. By setting an annular protrusion on the filter tube, a filtering space can be formed between the annular protrusion and the filter plate, so that the silt gathers there, and the filtering effect of the filter screen is improved. Due to the rotation of the impeller, a vortex is formed in the filter tube, causing the water in the suspension transverse tube to flow into the filter screen. After being filtered by the filter screen, the water flows back to the suspension transverse tube from the outer side of the impeller. At this time, due to the presence of the annular protrusion, a collision is formed with the silt in the water, so that the silt is not easy to enter the suspension transverse tube from both sides with the water. Preferably, the axis of the filter tube is not perpendicular to the horizontal plane.

[0023] Furthermore, the inner diameter of the suspended cross pipe gradually decreases along the water flow direction.

[0024] The technical solution sets the inner diameter of the suspended transverse pipe to gradually decrease along the direction of water flow, which can further improve the overflow degree of the suspended transverse pipe located behind the water flow. Since the sediment in the water is generally easy to settle at the bottom, the technical solution reduces the inner diameter of the suspended transverse pipe and gradually increases the water flow force. On the one hand, it can wash away the sediment deposited in the pipeline. On the other hand, the inner diameter of the pipeline is reduced. When the size of the filter plate remains unchanged, the ratio of the filter plate area to the cross-sectional area of ​​the pipeline suspension transverse pipe gradually increases. The filter plate can contact more water, and the filtering effect on the sediment in the water flow is stronger. Since the water flow passes through multiple filter tubes and filter plates, the sediment content in the water flow is less as it goes back. Therefore, the ratio of the filter plate area to the cross-sectional area of ​​the pipeline suspension transverse pipe increases, and the effect on the flow rate of the water is not obvious. Preferably, the cross-sectional area of ​​the suspension transverse pipe intersecting with the bottom end of the filter plate is E, the area of ​​the first to third filter plates along the direction of water flow is 1 / 5E≤B≤1 / 2E, and the area of ​​other filter plates is 1 / 4E≤B≤2 / 3E. Since the sediment content in the water in front along the water flow direction is relatively large, by setting the relative area of ​​the filter plate and the suspended cross pipe in the front three along the water flow direction to be smaller, the interference of the filter plate on the water flow velocity in the pipeline can be reduced. The sediment content in the water flows less as time goes back. Therefore, the ratio of the filter plate area to the cross-sectional area of ​​the pipeline suspension cross pipe is increased, which not only increases the amount of filtration by the filter plate in the pipeline, but also has little effect on the flow velocity of the water. It can be seen that this technical solution can meet the needs of filtering sediment in different sections of water flow and increase the drainage capacity of the drainage system by differentiated settings of the filter plate area and the cross-sectional area of ​​the suspension cross pipe.

[0025] In summary, the present invention has the following beneficial effects compared with the prior art:

[0026] 1. The siphon drainage system of the present invention adds multiple auxiliary drainage risers to the suspended transverse pipe, and sets a stop valve at the open end of the auxiliary drainage riser. When the rainfall is large and the amount of water entering the system is large, the stop valve is adjusted to open the open ends of the multiple auxiliary drainage risers, forming multiple vertical drainage channels with the main drainage riser, which greatly increases the unit flow rate of rainwater in the drainage system. The setting of multiple vertical drainage channels will also accelerate the flow rate of rainwater in the suspended transverse pipe, greatly increasing the drainage volume per unit time of the siphon drainage system; when it is the initial stage of rainfall or the rainfall is small, the water inflow into the system is small, the stop valve is adjusted to close the multiple auxiliary drainage risers, and the vertical drainage channels are reduced, so that the suspended transverse pipe and the vertical drainage channel can form full pipe flow more easily, quickly form a siphon phenomenon, and improve the drainage capacity of the system. This technical solution forms multiple vertical drainage channels by setting up multiple auxiliary drainage risers, and by setting a stop valve on the auxiliary drainage pipe. The stop valve is used to adjust the number of auxiliary drainage risers that are opened and closed. Even in the early stage of rainfall or when the rainfall is small, when the system water inflow is small, a siphon phenomenon can be quickly formed, thereby improving the drainage capacity of the system.

[0027] 2. The siphon drainage system of the present invention is based on the rotation angle of the vortex in the inner bucket. By setting a second rotating blade, the inner bucket is rotated in the opposite direction along the rotation angle of the vortex. The reverse rotation of the inner bucket can reduce the vortex formed by rainwater in the inner bucket, reduce the air entering the pipe due to the vortex, facilitate the formation of the siphon phenomenon, and improve the drainage capacity of the system. In order to further promote the reduction of the vortex, the technical solution sets a plurality of baffles in the inner bucket. When the inner bucket rotates, the baffles can prevent the formation of the vortex.

[0028] 3. The siphon drainage system of the present invention is provided with a plurality of filter tubes on the suspended transverse pipe. The impeller rotates to form a vortex in the filter tube so that the water in the suspended transverse pipe flows into the filter screen. The annular protrusion on the filter tube is used to form a filtering space between the annular protrusion and the filter plate, so that the silt is gathered there, thereby improving the filtering effect of the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0030] Figure 1 It is a structural schematic diagram of a suspended siphon drainage system;

[0031] Figure 2 It is a side view of the suspended cross pipe, auxiliary drainage riser, stop valve and curved lock plate;

[0032] Figure 3 A top view of the stop valve and the arc-shaped lock plate;

[0033] Figure 4 It is a top view of the auxiliary drainage riser and the curved partition;

[0034] Figure 5 It is a structural schematic diagram of the rainwater gutter and the connecting pipe;

[0035] Figure 6 It is a schematic diagram of the structure of the suspended horizontal pipe and filter tube.

[0036] Among them, 1-rainwater gutter, 101-outer bucket body, 102-inner bucket body, 103-second bearing, 105-second rotor blade, 106-baffle, 107-third through hole, 108-pipeline, 109-first protrusion, 110-second protrusion, 2-connecting pipe, 3-suspension horizontal pipe, 4-main drainage riser, 5-auxiliary drainage riser, 601-rotating shaft, 603-rotating cover plate, 604-limiting block, 605-first rotor blade, 606-arc lock plate, 607-baffle, 608-dial rod, 701-arc partition, 702-sub-drainage riser, 8-filter tube, 801-filter plate, 803-first bearing, 804-motor, 805-annular protrusion, 806-pressure plate, 807-pressure sensor. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0038] Embodiment 1:

[0039] like Figures 1 to 4 As shown, this embodiment includes a rain gutter 1, a suspension transverse pipe 3 and a main drainage riser 4. There are multiple rain gullets 1. A connecting pipe 2 connected to the suspension transverse pipe 3 is provided at the bottom of each rain gutter 1. An auxiliary drainage riser 5 is provided between two adjacent rain gullets 1. The upper opening end of the auxiliary drainage riser 5 is connected to the suspension transverse pipe 3. A stop valve is provided at the upper opening end of each auxiliary drainage riser 5. By providing multiple auxiliary drainage risers, multiple vertical drainage channels are formed, and by providing stop valves on the auxiliary drainage pipes, the number of auxiliary drainage risers to be opened and closed is adjusted by the stop valves. Even at the beginning of rainfall or when the rainfall is small, when the water intake of the system is small, a siphon phenomenon can be quickly formed, thereby improving the drainage capacity of the system.

[0040] Preferably, the horizontal distances between the two connecting pipes 2 arranged in sequence along the water flow direction in the suspension transverse pipe 3 and the auxiliary drainage riser 5 located in the middle are l and L respectively, where l≤1 / 2L. The inventor found in the course of research that since multiple rain gutters will inject rainwater into the suspension transverse pipe, when all the auxiliary drainage risers are opened, the water in the suspension transverse pipe will preferentially flow into the auxiliary drainage riser. If the distance between the auxiliary drainage riser and the next connecting pipe along the water flow direction is set too close, and if the water flow in the connecting pipe is large, the water flowing in from the connecting pipe is likely to partially flow back to the auxiliary drainage riser in the opposite direction of the water flow in the suspension transverse pipe, causing turbulence in the suspension transverse pipe, reducing the water flow velocity in the suspension transverse pipe, and even disrupting the siphon drainage, thereby affecting the drainage. The inventors have conducted repeated tests on the location of the auxiliary drainage riser and found that when the horizontal distances between two connecting pipes arranged in sequence along the water flow direction in the suspended transverse pipe and the auxiliary drainage riser located in the middle are l and L respectively, where l≤1 / 2L, even if the unit water flow in the connecting pipe is greater than the unit water flow in the suspended transverse pipe, the water in the connecting pipe will not flow back to the auxiliary drainage riser in the opposite direction of the water flow in the suspended transverse pipe. Under this setting, the drainage system can be used stably and the drainage capacity will not be reduced under different environments.

[0041] Preferably, the stop valve includes a rotating shaft 601, a first torsion spring, a rotating cover plate 603 and a limit block 604. The rotating shaft 601 is rotatable along a direction perpendicular to the horizontal plane and is arranged on the lower inner wall of the suspension cross tube 3. One end of the first torsion spring is fixed to the lower section of the rotating shaft 601, and the other end of the first torsion spring is fixed to the lower inner wall of the suspension cross tube 3. The rotating cover plate 603 matches the upper open end of the auxiliary drainage riser 5, and the end of the rotating cover plate 603 is fixed on the side wall of the rotating shaft 601. The limit block 604 is arranged on the lower inner wall of the suspension cross tube 3. A first vane 605 is also provided on the side wall of the rotating shaft 601. When in use, the rotating shaft 601 rotates to rotate the first vane 605 until it contacts the limit block 604. The check valve is set to a rotating shaft structure that rotates with the flow rate of the water to open and close the auxiliary drainage riser. Since there is a rainwater bucket between any two auxiliary drainage risers, even if multiple auxiliary drainage risers arranged along the water flow direction are blocked, more rainwater buckets arranged in front of the auxiliary drainage risers located behind the water flow will introduce rainwater. Since rainwater will enter the suspended cross pipe from the rainwater bucket, that is, when the open ends of all auxiliary drainage risers are closed, the rainwater entering from the rainwater bucket will be greater than the water flow rate and flow rate in the auxiliary drainage riser located behind it, that is, the water flow rate of the suspended cross pipe at the auxiliary drainage riser located behind the water flow will be greater than that at the front of the water flow. Due to the water flow velocity of the suspended cross pipe at the auxiliary drainage riser, the water flow thrust received by the stop valve at the rear will be greater than that of the water flow valve at the front. By setting the elastic coefficient of the first torsion spring, when subjected to the water flow thrust, multiple stop valves arranged along the water flow direction can be opened in sequence from the rear to the front. When the number of open stop valves is balanced with the water flow velocity, the stop valve will no longer open. It can be seen that the stop valve setting can not only realize the control of the closure of the open end of the auxiliary drainage riser, but also realize the step-by-step opening from back to front until the siphon drainage system reaches the ideal flow velocity and flow, thereby greatly increasing the drainage capacity of the system.

[0042] Preferably, an arc-shaped locking plate 606 coaxial with the rotating shaft 601 is provided on the inner side wall of the lower side of the suspension cross pipe 3, a plurality of blocks 607 are provided on the inner side wall of the arc-shaped locking plate 606 along the circumference thereof, a lever 608 cooperating with the block 607 is provided on the side wall of the rotating shaft 601, and the end of the lever 608 is fixed to the side wall of the rotating shaft 601 through a third torsion spring. The resistance to the rotation of the rotating shaft is increased by the levers and blocks cooperating with each other, and the increase in resistance is the point resistance brought by the plurality of levers arranged along the circumference of the arc-shaped locking plate, that is, the increased resistance is only encountered when the lever contacts the block. By this arrangement, the step-by-step adjustment of the rotation angle of the rotating shaft is realized, so as to realize the step-by-step control of the opening degree of the auxiliary drainage riser pipe, and realize the quantitative adjustment of the drainage volume of the auxiliary drainage riser. When water in the system stops flowing or the water flow rate decreases, the first torsion spring is reset to drive the rotating shaft to reset. Since the force generated by the recovery deformation of the first torsion spring is greater than the force of the third torsion spring, and when the lever contacts the block as the rotating shaft is reset, the resistance generated by the third torsion spring is less than the force when the lever rotates. Therefore, the force generated by the third torsion spring when the lever is reset as the rotating shaft is reset will not affect the reset of the lever.

[0043] Preferably, a plurality of arc partitions 701 are provided in the auxiliary drainage riser 5 along the axial direction thereof, and the plurality of arc partitions 701 divide the auxiliary drainage riser 5 into a plurality of sub-drainage risers 702; during the rotation of the rotating cover 603 around the rotating shaft 601, the lever 608 sequentially contacts with a plurality of blocks 607 along the rotating direction of the rotating shaft 601, and when the lever 608 contacts with any one of the blocks 607, the side surface of an arc partition 701 in the auxiliary drainage riser 5 is in the same vertical direction as the side wall of the rotating cover 603. In order to further achieve quantitative adjustment of the auxiliary drainage riser, the auxiliary drainage riser is divided into a plurality of sub-drainage risers by providing a plurality of arc partitions, and when the lever contacts with any one of the blocks, the side surface of an arc partition in the auxiliary drainage riser is in the same vertical direction as the side wall of the rotating cover, that is, when the lever cooperates with any one of the blocks, the dividing line formed by the rotating cover and the auxiliary drainage riser is in the same vertical direction as the arc partition. The inner diameter of the auxiliary drainage riser is adjusted by setting an arc-shaped partition in cooperation with a rotating cover plate, thereby achieving quantitative adjustment of the drainage volume of the auxiliary drainage riser.

[0044] This embodiment greatly increases the unit flow rate of rainwater in the drainage system by setting a plurality of auxiliary water distribution risers in the siphon drainage system to form a plurality of vertical drainage channels with the main drainage risers. The setting of the plurality of vertical drainage channels will also accelerate the flow rate of rainwater in the suspended horizontal pipes, greatly increasing the drainage volume per unit time of the siphon drainage system. In combination with the stop valve, the number of auxiliary drainage risers opened and closed is adjusted by the stop valve, so that even in the early stage of rainfall or when the rainfall is small, the siphon phenomenon can be quickly formed when the water intake of the system is small, thereby improving the drainage capacity of the system.

[0045] Embodiment 2:

[0046] like Figures 1 to 5 As shown, this embodiment further includes, on the basis of embodiment 1: the rainwater gutter 1 includes an outer gutter body 101 and an inner gutter body 102 sleeved in the outer gutter body 101, a first through hole is opened on the bottom surface of the outer gutter body 101, a connecting pipe 2 passes through the first through hole and extends upward, a second bearing 103 is arranged on the outer sleeve of the extension section of the connecting pipe 2, the bottom of the inner gutter body 102 is arranged on the outer ring of the second bearing 103, a second through hole is opened on the bottom surface of the inner gutter body 102, an open end of the extension section of the connecting pipe 2 is connected to the second through hole, and an inner wall of the inner gutter body 102 is provided with a second through hole. A plurality of baffles 106 are provided, and a plurality of second rotor blades 105 are provided on the outer side wall of the inner bucket body 102. When in use, the water flow impacts the second rotor blades 105 to rotate the inner bucket body 102, and the rotation direction of the inner bucket body 102 is opposite to the direction of the vortex in the inner bucket body 102; a plurality of third through holes 107 are also provided on the bottom surface of the outer bucket body 101, and the plurality of third through holes 107 are evenly distributed between the second through holes and the inner side wall of the outer bucket body 101, and a fourth through hole is provided on the side wall of the connecting pipe 2, and the fourth through hole is connected to the third through hole 107 through a pipe 108. According to the rotation angle of the vortex in the inner bucket, the inner bucket body is rotated in the opposite direction along the vortex rotation angle by providing the second rotor blade, and the vortex formed by the rainwater in the inner bucket body is reduced by the reverse rotation of the inner bucket body, and the air caused by the vortex entering the pipeline is reduced, which is conducive to the formation of the siphon phenomenon and improves the drainage capacity of the system; in order to further promote the reduction of the vortex, a plurality of baffles are provided in the inner bucket body, and when the inner bucket body rotates, the baffles can prevent the formation of the vortex.

[0047] Preferably, the plurality of second rotor blades 105 are evenly distributed in two circles on the outer side wall of the inner bucket 102 along the circumference thereof, and the plurality of first protrusions 109 and the plurality of second protrusions 110 are evenly distributed on the inner side wall of the outer bucket 101 along the circumference thereof, the circumference formed by the plurality of first protrusions 109 is directly opposite to the circle of second rotor blades 105 located above, and the circumference formed by the plurality of second protrusions 110 is directly opposite to the circle of second rotor blades 105 located below, and the gap between the first protrusions 109 and the outer side wall of the inner bucket 102 is larger than the gap between the second protrusions 110 and the outer side wall of the inner bucket 102. Two circles of protrusions are arranged in the outer bucket to reduce the gap between the outer bucket and the second rotor blades. When the second rotor blades start to rotate, rainwater flows between the inner and outer buckets, and air is not easy to enter the pipeline from the gap. In addition, the thickness of the second protrusion is set to be greater than the first protrusion, so that the gap between the inner and outer buckets is larger at the top and smaller at the bottom. When water flows from the larger gap to the smaller gap, rainwater is more likely to fill the smaller gap, thereby preventing air from entering the pipeline.

[0048] Preferably, two circles of second rotor blades 105 are arranged alternately.

[0049] Preferably, on the same horizontal plane, the diameter of the outer bucket 101 is D, the diameter of the inner bucket 102 is d, and 2 / 3D≤d≤7 / 8D. The diameters of the outer bucket and the inner bucket are set to 2 / 3D≤d≤7 / 8D, so that the rotation of the inner bucket has the greatest interference effect on the formation of the vortex, and the amount of air that can enter the pipeline from the inner and outer buckets is the least, so that the siphon phenomenon can be quickly formed, and the drainage capacity of the system is improved.

[0050] Preferably, the gap between the outer wall of the inner bucket 102 and the inner wall of the outer bucket 101 is gradually reduced from top to bottom. The gap between the outer wall of the inner bucket and the inner wall of the outer bucket is gradually reduced from top to bottom, so that the gap between the inner and outer buckets is larger at the top and smaller at the bottom. When water flows from the larger gap to the smaller gap, rainwater can more easily fill the small gap, preventing air from entering the pipe, quickly forming a siphon phenomenon, and improving the drainage capacity of the system.

[0051] The present embodiment sets a double-layer rain gutter to interfere with the formation of vortexes in the rain gutter, reduce the air entering the pipe due to the vortex, facilitate the formation of a siphon phenomenon, and improve the drainage capacity of the system; in order to further promote the reduction of the vortex; the present embodiment also sets the diameter size of the outer bucket body and the inner bucket body to 2 / 3D≤d≤7 / 8D to enhance the interference effect on the vortex. In addition, in order to avoid the influence of the gap between the inner and outer bucket bodies on the drainage capacity of the system, the present embodiment also sets a first protrusion and a second protrusion, and adopts a gap between the outer wall of the inner bucket body and the inner wall of the outer bucket body that gradually decreases from top to bottom to avoid air from entering the pipe, which can quickly form a siphon phenomenon and improve the drainage capacity of the system.

[0052] Embodiment 3:

[0053] like Figures 1 to 6As shown, this embodiment, on the basis of embodiment 2, further includes: a plurality of filter tubes 8 extending downward are provided on the lower inner wall of the suspended cross tube 3 along the axial direction thereof, the lower end of the filter tube 8 is closed, a filter screen is provided on the inner wall of the filter tube 8, an impeller is provided at the bottom of the filter tube 8, the impeller is located below the filter screen, a first bearing 803 is provided at the bottom of the filter tube 8, the bottom of the impeller shaft is provided on the inner ring of the first bearing 803, a motor 804 for driving the inner ring of the first bearing 803 to rotate is provided on the outer wall of the bottom of the filter tube 8, and an annular protrusion 805 is provided on the inner wall of the filter tube 8 above the filter screen along the circumference of the filter tube 8. Since the filter tube is provided with a filter impeller structure, when the impeller rotates, due to the vortex generated by the rotation of the impeller, the water flows from the suspended horizontal tube to the filter tube, and the sediment in the water is filtered through the filter and deposited on the filter. Due to the filtering effect of the filter plate in the suspended horizontal tube, the sediment content on the upper side of the filter tube is relatively large, and a large amount of sediment in the water can be filtered through the cooperation of the filter plate and the filter tube; at this time, by setting an annular protrusion on the filter tube, a filtering space can be formed between the annular protrusion and the filter plate, so that the sediment gathers there, thereby improving the filtering effect of the filter. Since water flow in a siphon drainage system is an important means of affecting drainage effects, a filter screen can be directly set in a connecting pipe or a suspended horizontal pipe to filter out sediment, but a fixed filter screen will inevitably affect the water flow rate in the pipe, especially when the water flow rate is small. The impact is even greater. When the filter screen is blocked, the drainage capacity of the system will be greatly reduced. A swingable filter plate is set, combined with an intermittently triggered structure in the filter tube, which can not only filter sediment when the sediment in the water is large, but also minimize the impact on the water flow rate in the pipe; when the water flow rate is slow or there is less sediment in the water, the filter plate has little impact on the water flow.

[0054] Preferably, a plurality of filter plates 801 matching with the filter tube 8 are provided on the inner wall on the lower side of the suspension transverse tube 3, and a second torsion spring is provided on the lower end of each filter plate 801, one end of the second torsion spring is fixed on the lower end of the filter plate 801, and the other end of the second torsion spring is fixed on the inner wall of the suspension transverse tube 3; a filter plate matching with the filter tube is provided in the suspension transverse tube to filter the sediment in the water, and the filter plate can be controlled to swing back and forth intermittently by setting a motor. When the filter plate swings from away from the opening end of the filter tube to close to the opening end of the filter tube, the sediment in the suspension transverse tube contacts the filter plate and is driven by the filter plate to approach the opening end of the filter tube, so that the sediment at the opening end of the filter tube is enriched, and then the vortex generated by the impeller structure in the filter tube is cooperated to make the sediment enter the filter tube and be filtered, thereby ensuring the working efficiency of the siphon drainage system.

[0055] Preferably, the angle between the filter plate 801 and the upper end face of the filter tube 8 is A, 45°≤A≤90°, and the lower end of the filter plate 801 is close to the main drainage riser 4, and the upper end of the filter plate 801 is far away from the main drainage riser 4, a pressure plate 806 is provided at the bottom end of the filter plate 801, and a pressure sensor 807 cooperating with the pressure plate 806 is provided on the inner side wall of the lower side of the suspension cross pipe 3, and there is a gap between the pressure plate 806 and the pressure sensor 807. A plurality of filter tubes are arranged on the suspension transverse tube, and a filter plate fixed in the suspension transverse tube by a second torsion spring is arranged. In the initial state, the filter plate is tilted and arranged above the suspension transverse tube. When water flows in the suspension transverse tube, the water flow will flow through the filter holes on the filter plate. The rotation angle of the filter plate is small. At this time, the pressure plate is not in contact with the pressure sensor. When the water contains more sediment, the resistance of water flowing through the filter plate increases. At this time, the water flow can more easily drive the filter plate to rotate, especially when the sediment adheres to the filter plate, the amount of water that can pass through the filter plate is greatly reduced. At this time, the filter plate will be driven by the water to cause the second torsion spring to deform until the pressure plate contacts the pressure sensor. The greater the sediment, the greater the force applied to the filter plate, and then the greater the pressure applied to the pressure sensor by the pressure plate. When the pressure applied to the pressure sensor reaches a preset value, the control module controls the motor to rotate. At this time, since there is a filter impeller structure in the filter tube, when the impeller rotates, due to the vortex generated by the rotation of the impeller, the water flows from the suspended horizontal tube to the filter tube, and the sediment in the water is filtered through the filter and deposited on the filter. The filter plate in the suspended horizontal tube has a filtering effect, and the sediment content on the upper side of the filter tube is large. Through the cooperation of the filter plate and the filter tube, a large amount of sediment in the water can be filtered; at this time, the annular protrusion on the filter tube can form a filtering space between the annular protrusion and the filter plate, so that the sediment gathers there, and the filtering effect of the filter is improved. The pressure sensor can be HH8204A25, M5600, etc. Preferably, the area of ​​the filter plate 801 is B, the cross-sectional area of ​​the suspension transverse pipe 3 is C, 1 / 5C≤B≤2 / 3C, within this range, the filter plate can play a filtering effect when there is more sediment in the water, and the interference to the water flow velocity of the suspension transverse pipe is minimal; because the water flow in the siphon drainage system is an important means to affect the drainage effect, such as directly setting a filter screen in the connecting pipe or the suspension transverse pipe to filter the sediment, but the fixed filter screen will inevitably affect the water flow velocity in the pipeline, especially when the water flow is small, the impact is greater, when the filter screen is blocked, it will cause the drainage capacity of the system to drop significantly, the technical solution is set to swing the filter plate, and combined with the structure of intermittent triggering in the filter tube, it can not only filter the sediment when the sediment in the water is large, but also minimize the impact on the water flow velocity in the pipeline; when the water flow velocity is slow or the sediment in the water is less, the filter plate has little effect on the water flow. Preferably, the axis of the filter tube 8 is not perpendicular to the horizontal plane. The pressure sensor used in this embodiment can be HH8204A25, M5600, etc.

[0056] Preferably, the inner diameter of the suspension transverse pipe 3 gradually decreases along the direction of water flow. Setting the inner diameter of the suspension transverse pipe to gradually decrease along the direction of water flow can further improve the overflow degree of the suspension transverse pipe located behind the water flow. Since the sediment in the water is generally easy to settle at the bottom, by reducing the inner diameter of the suspension transverse pipe, the water flow impulse is gradually increased. On the one hand, the sediment deposited in the pipeline can be washed away. On the other hand, the inner diameter of the pipeline is reduced. When the size of the filter plate remains unchanged, the ratio of the filter plate area to the cross-sectional area of ​​the pipeline suspension transverse pipe gradually increases. The filter plate can contact more water, and the filtering effect on the sediment in the water flow is stronger. Since the water flow passes through multiple filter tubes and filter plates, the sediment content in the water flow is less as it goes back. Therefore, the ratio of the filter plate area to the cross-sectional area of ​​the pipeline suspension transverse pipe increases, and the effect on the flow velocity is not obvious.

[0057] Preferably, the cross-sectional area of ​​the intersection of the suspension transverse pipe 3 and the bottom end of the filter plate 801 is E, the area of ​​the first to third filter plates 801 along the water flow direction is 1 / 5E≤B≤1 / 2E, and the area of ​​other filter plates 801 is 1 / 4E≤B≤2 / 3E. Since the sediment content in the water in the front along the water flow direction is relatively large, by setting the relative area of ​​the first three filter plates along the water flow direction to be smaller than that of the suspension transverse pipe, the interference of the filter plate on the water flow velocity in the pipeline can be reduced. The sediment content in the water flows further back, so the ratio of the filter plate area to the cross-sectional area of ​​the pipeline suspension transverse pipe is increased, which not only increases the amount of filtration of the filter plate in the pipeline, but also has little effect on the flow velocity of the water. It can be seen that by differentially setting the filter plate area and the cross-sectional area of ​​the suspension transverse pipe, the filtering needs of sediment in different sections of the water flow can be met, and the drainage capacity of the drainage system can be increased.

[0058] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A suspended siphon drainage system, comprising a rain gutter (1), a suspended horizontal pipe (3) and a main drainage riser (4), wherein there are a plurality of rain gutter (1), and a connecting pipe (2) connected to the suspended horizontal pipe (3) is provided at the bottom of each rain gutter (1), characterized in that: An auxiliary drainage riser (5) is provided between two adjacent rainwater hoppers (1); the upper opening end of the auxiliary drainage riser (5) is communicated with the suspension transverse pipe (3); a stop valve is provided at the upper opening end of each auxiliary drainage riser (5); the stop valve comprises a rotating shaft (601), a first torsion spring, a rotating cover plate (603) and a limit block (604); the rotating shaft (601) is arranged on the lower inner wall of the suspension transverse pipe (3) so as to rotate in a direction perpendicular to the horizontal plane; one end of the first torsion spring is fixed to the lower section of the rotating shaft (601); the other end of the first torsion spring is fixed to the lower inner wall of the suspension transverse pipe (3); the rotating cover plate (603) matches the upper opening end of the auxiliary drainage riser (5); and the end of the rotating cover plate (603) is fixed. On the side wall of the rotating shaft (601), a limit block (604) is arranged on the inner side wall of the lower side of the suspension transverse tube (3), and a first rotating blade (605) is also arranged on the side wall of the rotating shaft (601). When in use, the rotating shaft (601) rotates to rotate the first rotating blade (605) until it contacts the limit block (604); an arc-shaped locking plate (606) coaxial with the rotating shaft (601) is arranged on the inner side wall of the lower side of the suspension transverse tube (3), and a plurality of stop blocks (607) are arranged on the inner side wall of the arc-shaped locking plate (606) along the circumference thereof; a lever (608) cooperating with the stop block (607) is arranged on the side wall of the rotating shaft (601), and an end of the lever (608) is fixed to the side wall of the rotating shaft (601) by a third torsion spring; along the auxiliary row A plurality of arc-shaped partitions (701) are axially arranged inside the water riser (5), and the plurality of arc-shaped partitions (701) divide the auxiliary drainage riser (5) into a plurality of sub-drainage risers (702); during the rotation of the rotating cover plate (603) around the rotating shaft (601), the lever (608) sequentially contacts the plurality of blocks (607) along the rotation direction of the rotating shaft (601); when the lever (608) contacts any one of the blocks (607), the side surface of an arc-shaped partition (701) in the auxiliary drainage riser (5) is in the same vertical direction as the side wall of the rotating cover plate (603); the rainwater gutter (1) comprises an outer gutter body (101) and an inner gutter body (102) sleeved inside the outer gutter body (101), A first through hole is formed on the bottom surface of the outer bucket body (101), the connecting pipe (2) passes through the first through hole and extends upward, a second bearing (103) is provided on the outer sleeve of the extension section of the connecting pipe (2), the bottom of the inner bucket body (102) is arranged on the outer ring of the second bearing (103), a second through hole is formed on the bottom surface of the inner bucket body (102), the open end of the extension section of the connecting pipe (2) is connected to the second through hole, a plurality of baffles (106) are provided on the inner side wall of the inner bucket body (102), and a plurality of second rotating blades (105) are provided on the outer side wall of the inner bucket body (102), when in use, water flow impacts the second rotating blades (105) to rotate the inner bucket body (102), and the rotation direction of the inner bucket body (102) is opposite to the direction of the vortex inside the inner bucket body (102);A plurality of third through holes (107) are also formed on the bottom surface of the outer bucket (101), and the plurality of third through holes (107) are evenly distributed between the second through hole and the inner side wall of the outer bucket (101). A fourth through hole is formed on the side wall of the connecting pipe (2), and the fourth through hole is connected to the third through hole (107) via a pipe (108). ; 2. A suspended siphon drainage system as claimed in claim 1, characterized in that: A plurality of second rotating blades (105) are evenly distributed in two circles on the outer side wall of the inner bucket body (102) along the circumference thereof, and a plurality of first protrusions (109) and a plurality of second protrusions (110) are evenly distributed on the inner side wall of the outer bucket body (101) along the circumference thereof, wherein the circumference formed by the plurality of first protrusions (109) directly faces the circle of second rotating blades (105) located above, and the circumference formed by the plurality of second protrusions (110) directly faces the circle of second rotating blades (105) located below, and the gap between the first protrusions (109) and the outer side wall of the inner bucket body (102) is greater than the gap between the second protrusions (110) and the outer side wall of the inner bucket body (102).

3. A suspended siphon drainage system as claimed in claim 1, characterized in that: On the same horizontal plane, the diameter of the outer bucket body (101) is D, the diameter of the inner bucket body (102) is d, and 2 / 3D≤d≤7 / 8D.

4. A suspended siphon drainage system as claimed in claim 1, characterized in that: The gap between the outer wall of the inner bucket body (102) and the inner wall of the outer bucket body (101) gradually decreases from top to bottom.

5. A suspended siphon drainage system according to any one of claims 1 to 4, characterized in that: A plurality of filter tubes (8) extending downward are arranged on the inner side wall of the lower side of the suspension transverse tube (3) along the axial direction thereof, the lower end of the filter tube (8) is closed, a filter screen is arranged on the inner side wall of the filter tube (8), an impeller is arranged at the bottom of the filter tube (8), the impeller is located below the filter screen, a first bearing (803) is arranged at the bottom of the filter tube (8), the shaft bottom of the impeller is arranged on the inner ring of the first bearing (803), a motor (804) for driving the inner ring of the first bearing (803) to rotate is arranged on the outer side wall of the bottom of the filter tube (8), and an annular protrusion (805) is arranged on the inner side wall of the filter tube (8) above the filter screen along the circumference of the filter tube (8).

6. A suspended siphon drainage system as claimed in claim 5, characterized in that: The inner diameter of the suspended horizontal pipe (3) gradually decreases along the water flow direction.

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