Drain pipe weir plate interception and flushing device based on siphon suction and float control

Abstract

The present invention discloses a weir plate intercepting and flushing device for drainage pipes based on siphon suction and float control. The rotating weir plate includes a rotating shaft, a prefabricated torsion spring group, and a baffle. The baffle can rotate around the rotating shaft as the central axis, and the prefabricated torsion spring group provides a prefabricated torsion for the rotating shaft to make the baffle rotate upstream. Two rotating weir plates are symmetric with respect to the vertical axial symmetry plane of the drainage pipe. The bottom end of the baffle is in clearance fit with the inner wall of the drainage pipe. An arc-shaped sealing ring is arranged on the upstream side of the rotating weir plate. The water level control group is arranged downstream of the rotating weir plate. In the first state, the water level control group limits the rotating weir plate, and in the second state, the water level control group is separated from the rotating weir plate. The inlet end of the siphon drainage pipe is arranged upstream of the rotating weir plate and communicates with the bottom of the inner cavity of the drainage pipe, and the outlet end of the siphon drainage pipe is arranged downstream of the rotating weir plate. The present invention can prevent the formation of sediments in the drainage pipe while not affecting the normal use of the drainage pipe during the rainy season.

Description

Technical Field

[0001] The present invention relates to the technical field of drainage pipeline treatment, and specifically to a drainage pipeline weir plate interception and flushing device based on siphon suction and float control. Background Art

[0002] With the continuous acceleration of urban construction in China, drainage pipelines are being built longer and there are more and more sewage treatment plants, which continuously improves the urban sewage treatment capacity in China. Drainage pipelines are an important part of the drainage system and also an important passage for the urban water cycle, mainly including rainwater and sewage pipelines under the separate sewer system, as well as combined sewer pipelines. Among them, the separate sewer system is a system that discharges domestic sewage, industrial wastewater, and rainwater separately in two or more independent pipelines. The separate sewer system has a relatively low degree of pollution to water bodies; the combined sewer system is a drainage system that mixes domestic sewage, industrial wastewater, and rainwater and discharges them in the same channel. Therefore, the combined sewer system has a relatively high degree of pollution to water bodies. In recent years, relatively complete separate sewer pipeline systems have been formed in many large cities in China. However, due to historical reasons and the difficulty of actual transformation, there are still a large number of combined sewer systems in the drainage pipe networks of many old urban areas. Due to reasons such as the lag in the construction of the sewage system behind the rainwater system and the failure to synchronously implement the connection of pollution sources to the pipe network, some sewage that should have been connected to the sewage pipe network is mixed into the rainwater pipe network, resulting in the fact that some separate sewer systems do not achieve true rain-sewage separation.

[0003] During the dry season, the flow rate of sewage is low, and a large amount of pollutants in it are deposited in the drainage pipeline, that is, "hiding dirt and accumulating filth"; during the rainy season, pollutants existing in the atmosphere and on the ground surface and a large amount of sediments in the rainwater pipeline are washed by rainwater into natural water bodies, that is, "saving bit by bit and taking it out all at once". When the sewage in the drainage pipeline is in a state of low flow rate and low velocity, due to insufficient hydraulic scouring, the particulate matter in the sewage will, under the action of gravity, gather a large amount of organic matter and accumulate at the bottom of the pipeline to form sediments. When the sewage in the drainage pipeline remains in a low-velocity state for a long time, the organic matter component in the bottom sediments will ferment due to being in an anoxic state for a long time. On the one hand, it will make the sediments become black and stinky, and on the other hand, it will also further increase the viscosity of the sediments, making it more difficult to scour the bottom sediments. The sediments will become black and stinky after being in the drainage pipeline for a long time. When it rains, the black and stinky sediments will enter the natural water body along with the rainwater, polluting the water resources. Therefore, for the separate sewer system with mixed rainwater pipelines and the combined sewer system, the sewage sediments in the drainage pipeline will cause black and stinky pollution of water bodies. Summary of the Invention

[0004] In order to solve the problem of the deposition of particulate matter in low-velocity sewage in the existing technology in the drainage pipeline, the present invention provides the following:

[0005] A rotating weir plate, comprising a rotating shaft, a prefabricated torsion spring assembly, and a baffle, wherein one end of the rotating shaft is connected to the prefabricated torsion spring assembly, and the other end is connected to the bottom end of the drainage pipe, the prefabricated torsion spring assembly is connected to the top end of the drainage pipe, and the baffle is connected to the end of the rotating shaft away from the prefabricated torsion spring assembly, the prefabricated torsion spring assembly providing the rotating shaft with a prefabricated torsion force causing the baffle to rotate upstream; wherein the two baffles are symmetrical with respect to the vertical axial symmetry plane of the drainage pipe, the two baffles are spliced to form a circular segment, and the bottom end of the baffle is clearance-matched with the inner wall of the drainage pipe;

[0006] a sealing ring, the sealing ring being arc-shaped and connected to the inner wall of the drainage pipe, the sealing ring being arranged on the upstream side of the rotating weir plate and limiting the position of the rotating weir plate and restricting water flow from passing through the gap between the baffle plate and the drainage pipe;

[0007] a water level control group, the water level control group being arranged downstream of the rotating weir plate, wherein in a first state, the water level control group is connected to the rotating weir plate and limits the rotating weir plate, and in a second state, the water level control group is separated from the rotating weir plate;

[0008] A siphonic drain pipe, wherein the inlet end of the siphonic drain pipe is arranged upstream of the rotating weir plate and communicates with the bottom of the inner cavity of the drainage pipe, and the outlet end of the siphonic drain pipe is arranged downstream of the rotating weir plate and communicates with the side wall of the drainage pipe.

[0009] The inlet end of the siphon type drain pipe is provided with a cyclone-like device, which can form a cyclone at the bottom of the water.

[0010] The cyclone-like device includes a top plate and a bottom plate. The bottom plate is provided with a vertically penetrating water outlet, which is connected to the siphon drain pipe. A guide plate is provided between the top plate and the bottom plate, and a guide channel is formed between two adjacent guide plates.

[0011] The water level control group includes:

[0012] A chute is provided in the drainage pipe, the chute is T-shaped, a reset member is provided in the horizontal groove of the chute, a slider is provided in the vertical groove of the chute, and the slider is slidably engaged with the chute;

[0013] The reset member includes a block groove, a push rod and a toggle rod, one end of the toggle rod is rotatably connected to the drainage pipe, and the other end is located upstream of the baffle; one end of the push rod is connected to the middle part of the toggle rod, and the other end is connected to the block groove, the block groove is slidably matched with the slide groove, and the block groove is used to accommodate the slider;

[0014] A floating ball, which is connected to the slider through a connecting rod. A baffle is connected below the floating ball, and the baffle is used to limit the position of the baffle plate;

[0015] In the first state, the slider cooperates with the vertical groove of the chute. In the second state, the slider is located in the block receiving groove.

[0016] The slider is spherical, and the block receiving groove is bowl-shaped with an opening facing downwards. In the first state, the block receiving groove is located above the vertical groove of the chute.

[0017] The water level control group includes a first water level control group and a second water level control group. The first water level control group limits the position of the first baffle plate, and the second water level control group limits the position of the second baffle plate. Compared with the second slider in the second water level control group, the vertical stroke of the first slider in the first water level control group is shorter.

[0018] A resistance plate is provided on the upstream side of the baffle plate. One end of the resistance plate is connected to and forms an angle with the end of the baffle plate close to the rotation axis, and the other end of the resistance plate is connected to the baffle plate through a support plate.

[0019] A buffer cavity and a paddle wheel are provided in the siphon drain pipe. The length extension direction of the central axis of the paddle wheel is perpendicular to the water flow direction in the siphon drain pipe, and one end of the paddle wheel is located in the buffer cavity;

[0020] A swirl wheel is vertically provided in the drain pipe, and the swirl wheel is in transmission connection with the paddle wheel.

[0021] A water storage cavity is formed between the resistance plate and the baffle plate. The swirl wheel includes a plurality of swirl vanes, and a water outlet is provided on one side of the swirl vanes. The swirl wheel is rotationally symmetric. The water storage cavity is communicated with the water outlet through a water delivery pipe, and the water delivery pipe is provided with a torsion elimination component.

[0022] The water delivery pipe includes a first water delivery pipe and a second water delivery pipe. The torsion elimination component includes a first component and a second component. A water delivery cavity is provided in the second component. One end of the first component is in cooperation with the inner wall of the water delivery cavity through a ball, and the other end penetrates through the water delivery cavity. The first water delivery pipe penetrates through the first component and is communicated with the water delivery cavity, and the second water delivery pipe penetrates through the second component and is communicated with the water delivery cavity.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] In the present invention, a prefabricated torsion spring group is provided at the top of the rotating shaft, a sealing ring is provided upstream of the baffle for limiting, and a water level control group is provided downstream of the baffle for limiting, so that the baffle is perpendicular to the sewage flow direction, and the sewage with low flow velocity and small flow rate in the drainage pipe is intercepted. By providing a siphon drainage pipe to connect the upstream and downstream of the baffle, when the liquid level height of the intercepted water reaches the siphon water level of the siphon drainage pipe, that is, when the liquid level height reaches the top of the siphon drainage pipe, a siphon phenomenon is generated in the siphon drainage pipe, and the sewage and alluvial deposits at the bottom of the drainage pipe are quickly sucked to the downstream of the baffle, preventing the formation of sediments in the drainage pipe. During the rainy season, when the sewage flow is large and the flow velocity is fast, and the water level upstream of the baffle exceeds the top of the baffle, as the water level rises, the water level control group separates from the baffle, and the baffle is impacted by the flowing water and rotates downstream, and the rotating weir plate will not affect the drainage of the drainage pipe. For combined sewer pipes, this device can push the sediments to move downstream to the sewage treatment plant, thus achieving the effect of dredging; for separate stormwater pipes mixed with sewage, auxiliary facilities such as a sedimentation well can be set behind this device to collect the sewage back into the sewage pipe. The present invention has the characteristics of simplicity, reliability, economy and environmental protection, has good applicability, and only needs to simply transform the existing rainwater pipe or combined sewer pipe to prevent the formation of sediments in the drainage pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 is the overall structural schematic diagram of the present invention;

[0027] Figure 2 is the top view of the water level control group in the first state;

[0028] Figure 3 is the top view of the water level control group in the second state;

[0029] Figure 4 is the side view of the water level control group in the first state;

[0030] Figure 5 is the side view of the water level control group in the second state;

[0031] Figure 6 is the top view of the guide vane of the cyclone-like device;

[0032] Figure 7 is Figure 6 the partial cross-sectional view of the cyclone-like device in

[0033] Figure 8 is a schematic diagram of the deflector in another embodiment;

[0034] Figure 9 is a schematic cross-sectional view of the torsion elimination component;

[0035] Figure 10 is Figure 9 the schematic cross-sectional view taken along the line A-A in

[0036] Figure 11 is Figure 9 the schematic cross-sectional view taken along the line B-B in

[0037] Figure 12 is a schematic diagram of the cooperation of the paddle impeller, the cyclone wheel and the water delivery pipe;

[0038] Figure 13 is the siphon drainage pipeline route.

[0039] Reference numerals:

[0040] 11. Drainage pipeline; 12. Rotating weir plate; 121. Rotating shaft; 122. Prefabricated torsion spring group; 123. Baffle; 13. Sealing ring; 14. Water level control group; 140. First water level control group; 141. Chute; 142. Slide block; 143. Block groove; 144. Thrust rod; 145. Toggle rod; 146. Floating ball; 147. Connecting rod; 148. Flap; 15. Siphon drainage pipe; 151. Buffer cavity; 152. Paddle impeller; 153. First gear; 16. Cyclone-like device; 161. Top plate; 162. Bottom plate; 163. Deflector; 164. Deflection channel; 171. Resistance plate; 172. Support plate; 173. Water storage cavity; 181. Water storage level; 182. Siphon level; 183. First start-up level; 184. Second start-up level; 19. Cyclone wheel; 191. Cyclone vane; 192. Water outlet; 20. Water delivery pipe; 201. First water delivery pipe; 202. Second water delivery pipe; 21. Torsion elimination component; 211. First component; 212. Second component; 213. Water delivery cavity. Detailed implementation manners

[0041] The following further describes in detail the implementation manners of the present invention with reference to the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention. Without contradiction, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples.

[0042] Figure 1 illustrates the overall structural schematic diagram of the present invention, Figure 2 illustrates the top view of the water level control group 14 in the first state (the arrow direction in the figure indicates the water flow direction),Figure 3 The top view when the water level control group 14 is in the second state is illustrated (the arrow direction in the figure indicates the water flow direction), as Figures 1-3 shown, the weir plate intercepting and flushing device for a drainage pipe 11 based on siphon suction and float control in this embodiment includes: a rotating weir plate 12, a sealing ring 13, a water level control group 14, and a siphon drainage pipe 15. The rotating weir plate 12 includes a rotating shaft 121, a prefabricated torsion spring group 122, and a baffle 123. One end of the rotating shaft 121 is connected to the prefabricated torsion spring group 122, and the other end is connected to the bottom end of the drainage pipe 11. The prefabricated torsion spring group 122 is connected to the top end of the drainage pipe 11. The baffle 123 is connected to the end of the rotating shaft 121 far from the prefabricated torsion spring group 122. The baffle 123 can rotate around the rotating shaft 121 as the central axis. The rotating shaft 121 can be inserted, welded, or integrally formed with the baffle 123. The prefabricated torsion spring group 122 provides a prefabricated torsion for the rotating shaft 121 to make the baffle 123 rotate upward. Among them, two rotating weir plates 12 are symmetric with respect to the vertical axial symmetry plane of the drainage pipe 11. The two baffles 123 are spliced to form a segmental shape. The bottom end of the baffle 123 is arc-shaped, and the bottom end of the baffle 123 is in clearance fit with the inner wall of the drainage pipe 11. The baffle 123 can be coaxially arranged with the drainage pipe 11. The sealing ring 13 is arc-shaped and connected to the inner wall of the drainage pipe 11. The sealing ring 13 is arranged on the upstream side of the rotating weir plate 12 to limit the rotating weir plate 12. The material of the sealing ring 13 can be steel. In addition, the baffle 123 abuts against the sealing ring 13, and the sealing ring 13 can limit the water flow passing through the gap between the baffle 123 and the drainage pipe 11. The water level control group 14 is arranged downstream of the rotating weir plate 12. In the first state, the water level control group 14 is connected to the rotating weir plate 12 and limits the rotating weir plate 12. In the second state, the water level control group 14 is separated from the rotating weir plate 12. The inlet end of the siphon drainage pipe 15 is arranged upstream of the rotating weir plate 12 and communicates with the bottom of the inner cavity of the drainage pipe 11. The outlet end of the siphon drainage pipe 15 is arranged downstream of the rotating weir plate 12 and communicates with the side wall of the drainage pipe 11. The siphon drainage pipe 15 is in an inverted U shape. When the liquid in the siphon drainage pipe 15 crosses the highest point (i.e., the siphon water level 182) and falls due to gravity, a siphon phenomenon will occur in the siphon drainage pipe 15, and the sediment upstream of the rotating weir plate 12 will be quickly transported to the downstream of the rotating weir plate 12.

[0043] In the present invention, a prefabricated torsion spring group 122 is provided at the top of the rotating shaft 121, a sealing ring 13 is provided upstream of the baffle 123 for limiting, and a water level control group 14 is provided downstream of the baffle 123 for limiting, so that the baffle 123 is perpendicular to the sewage flow direction, and the sewage with low flow velocity and small flow rate in the drainage pipe 11 is intercepted. By providing a siphon drainage pipe 15 to connect the upstream and downstream of the baffle 123, when the liquid level height of the intercepted water reaches the siphon water level 182 of the siphon drainage pipe 15, that is, when the liquid level height reaches the top of the siphon drainage pipe 15, a siphon phenomenon occurs in the siphon drainage pipe 15, and the sewage and alluvial deposits at the bottom of the drainage pipe 11 are quickly sucked to the downstream of the baffle 123, preventing the formation of sediments in the drainage pipe 11. During the rainy season, when the sewage flow is large and the flow velocity is fast, when the water level upstream of the baffle 123 exceeds the top of the baffle 123, as the water level rises, the water level control group 14 separates from the baffle 123, and the baffle 123 is impacted by the rainwater and rotates downstream, and the rotating weir plate 12 will not affect the drainage of the drainage pipe 11. For combined sewer pipes, this device can push the sediments to move downstream to the sewage treatment plant, thus achieving the effect of dredging; for separate stormwater pipes mixed with sewage, auxiliary facilities such as a sedimentation well can be set behind this device to collect the sewage back into the sewage pipe. The present invention has the characteristics of being simple, reliable, economical and environmentally friendly, and only needs to simply transform the existing rainwater pipe or combined sewer pipe to prevent the formation of sediments in the drainage pipe 11.

[0044] According to an embodiment of the present invention, Figure 6 The top view of the guide vane 163 of the cyclone-like device 16 is illustrated, Figure 7 illustrates Figure 6 a partial cross-sectional view of the cyclone-like device 16 in, as Figures 1-2 and Figures 6-7 shown, a cyclone-like device 16 is provided at the inlet end of the siphon drainage pipe 15, and the cyclone-like device 16 can form a water-shearing swirl at the bottom of the water, scouring the bottom sediments.

[0045] According to an embodiment of the present invention, Figure 8 The schematic diagram of the guide vane 163 in another embodiment is illustrated, as Figures 6-8 shown, the cyclone-like device 16 includes a top plate 161 and a bottom plate 162, the bottom plate 162 is provided with a vertically penetrating water outlet, the water outlet is communicated with the siphon drainage pipe 15, a guide vane 163 is provided between the top plate 161 and the bottom plate 162, and the extending direction of the guide vane 163 from the outside to the inside can be clockwise or counterclockwise, and a guide channel 164 is formed between two adjacent guide vanes 163. Sewage enters the cyclone-like device 16 through the guide channel 164 and enters the siphon drainage pipe 15 through the water outlet. On the one hand, it prevents the generation of swirl on the water surface and the entry of air into the siphon drainage pipe 15. On the other hand, it forms a water-shearing swirl at the bottom of the water, which can scour the bottom sediments and is beneficial to transferring the alluvial deposits upstream of the baffle 123 to the downstream of the baffle 123.

[0046] According to an embodiment of the present invention, Figure 4 The side view when the water level control group 14 is in the first state is illustrated, Figure 5 The side view when the water level control group 14 is in the second state is illustrated. As Figures 4-5 shown, the water level control group 14 includes: a floating ball 146, a chute 141 provided in the drainage pipe 11. The chute 141 is T-shaped. A reset member is provided in the horizontal groove of the chute 141, and a slider 142 is provided in the vertical groove of the chute 141. The slider 142 is slidably engaged with the chute 141. The reset member includes a block receiving groove 143, a push rod 144 and a toggle rod 145. One end of the toggle rod 145 is rotatably connected to the drainage pipe 11, and the other end is located upstream of the baffle 123. One end of the push rod 144 is connected to the middle of the toggle rod 145, and the other end is connected to the block receiving groove 143. The block receiving groove 143 is slidably engaged with the chute 141, and the block receiving groove 143 is used to receive the slider 142. The floating ball 146 is connected to the slider 142 through a connecting rod 147. A baffle 148 is connected below the floating ball 146, and the baffle 148 is used to limit the rotation of the weir plate 12. In the first state, the slider 142 is engaged with the vertical groove of the chute 141. In the second state, the slider 142 is located in the block receiving groove 143. During the rainy season, as the water level upstream of the weir plate 12 rises, the floating ball 146 floats on the water surface. The floating ball 146 drives the baffle 148 to rise. When the liquid level reaches the starting water level, the baffle 148 is separated from the weir plate 12, and the baffle 123 is impacted by the rainwater and rotates downstream. At the same time, the slider 142 enters the block receiving groove 143. When the floating ball 146 is washed downstream by the rainwater, the slider 142 drives the block receiving groove 143 to slide downstream, and the slider 142 is limited. When the water level upstream of the weir plate 12 drops, the impact force of the rainwater on the baffle 123 decreases. The baffle 123 is reset under the action of the spring torque and pushes the toggle rod 145 to reset, thereby pulling the block receiving groove 143 and the slider 142 to reset. The slider 142 and the floating ball 146 fall under the action of gravity, and the baffle 148 still limits the weir plate 12. The device of the present invention automatically resets to the dry season interception state.

[0047] According to an embodiment of the present invention, as Figures 4-5 shown, the slider 142 is spherical, and the block receiving groove 143 is bowl-shaped with an opening facing downwards; in the first state, the block receiving groove 143 is located above the vertical groove of the chute 141. The spherical slider 142 can reduce the friction between the slider 142 and the chute 141.

[0048] According to an embodiment of the present invention, as Figure 1As shown, the water level control group 14 includes a first water level control group 140 and a second water level control group. The first water level control group 140 limits one of the rotary weir plates 12, and the second water level control group limits the other rotary weir plate 12. Compared with the second slider in the second water level control group, the vertical stroke of the first slider in the first water level control group 140 is shorter, that is, the first starting water level 183 is lower.

[0049] According to an embodiment of the present invention, as Figures 2-3 shown, a resistance plate 171 is provided on the upstream side of the baffle plate 123. One end of the resistance plate 171 is connected to the end of the baffle plate 123 close to the rotary shaft 121 to form an angle, and the other end of the resistance plate 171 is connected to the baffle plate 123 through a support plate 172. When the baffle plate 123 is opened to the maximum, that is, when the angle between the baffle plate 123 and the water flow direction is 0, adding the resistance plate 171 can increase the projected area of the rotary weir plate 12 in the vertical water flow direction against the water flow impact.

[0050] According to an embodiment of the present invention, as Figure 2 and Figure 3 shown, a buffer chamber 151 and a paddle wheel 152 are provided in the siphon drain pipe 15. The length extension direction of the central axis of the paddle wheel 152 is perpendicular to the water flow direction in the siphon drain pipe 15, and one end of the paddle wheel 152 is located in the buffer chamber 151. A swirl wheel 19 is vertically provided in the drain pipe 11, and the swirl wheel 19 is in transmission connection with the paddle wheel 152. One end of the paddle wheel 152 is located in the buffer chamber 151 and will not be impacted by the water flow in the siphon drain pipe 15, while the other end will be impacted by the water flow. When a siphon phenomenon occurs in the siphon drain pipe 15, the water flow impacts the paddle wheel 152, and the paddle wheel 152 rotates. The rotation central axis of the swirl wheel 19 can be vertically arranged. The paddle wheel 152 drives the swirl wheel 19 to rotate, agitating the sewage upstream of the swirl type hydrocyclone 16, making the water flow scour the bottom of the drain pipe 11 more thoroughly.

[0051] It should be noted here that Figure 12 illustrates a schematic diagram of the cooperation of the paddle wheel 152, the swirl wheel 19 and the water delivery pipe 20. The paddle wheel 152 can be provided with a coaxial first gear 153, and the swirl wheel 19 can be provided with a coaxial second gear, and the first gear 153 is in transmission connection with the second gear through a tooth chain.

[0052] According to an embodiment of the present invention, as Figures 1-3As shown, a water storage cavity 173 is formed between the resistance plate 171 and the baffle plate 123, and the water storage cavity 173 opens upward. The swirl wheel 19 includes a plurality of swirl vanes 191. One side of the swirl vane 191 is provided with a water outlet 192, and the swirl wheel 19 is of a rotationally symmetric shape. The water storage cavity 173 is communicated with the water outlet 192 through a water delivery pipe 20, and the water delivery pipe 20 is provided with a torsion elimination component 21. The bottom of the water storage cavity 173 is higher than the swirl wheel 19. When the siphon drain pipe 15 completes one siphon, the upstream water level drops rapidly, and the sewage in the water storage cavity 173 flows out through the water delivery pipe 20 and from the water outlet 192, forming a water flow that flushes the bottom of the drainage pipe 11. Since the swirl wheel 19 is of a rotationally symmetric shape, the water flow can drive the swirl wheel 19 to rotate, flushing the residual sediment upstream of the hydrocyclone 16 to the vicinity of the hydrocyclone 16, which is beneficial to the siphon drain pipe 15 to transport sediment.

[0053] It should be noted here that the swirl vane 191 is internally provided with a water outlet channel, and the water flow flows from the center of the swirl wheel 19 to the surroundings through the swirl vane 191.

[0054] According to an embodiment of the present invention, Figure 9 The cross-sectional schematic diagram of the torsion elimination component 21 is shown, Figure 10 shown Figure 9 in the cross-sectional schematic diagram taken along the line A-A in Figure 11 shown Figure 9 in the cross-sectional schematic diagram taken along the line B-B in. The water delivery pipe 20 includes a first water delivery pipe 201 and a second water delivery pipe 202; the torsion elimination component 21 includes a first component 211 and a second component 212. A water delivery cavity 213 is provided inside the second component 212. One end of the first component 211 is matched with the inner wall of the water delivery cavity 213 through a ball, and the other end penetrates through the water delivery cavity 213; the first water delivery pipe 201 penetrates through the first component 211 and is communicated with the water delivery cavity 213, and the second water delivery pipe 202 penetrates through the second component 212 and is communicated with the water delivery cavity 213. The first water delivery pipe 201 is connected to the swirl wheel 19, and the second water delivery pipe 202 is connected to the baffle plate 123. The swirl wheel 19 can rotate while receiving the water flow. Similarly, the second water delivery pipe 202 can also be provided with a torsion elimination component 21 to eliminate the torsion generated on the second medicine delivery pipe when the baffle plate 123 rotates.

[0055] (1) Related calculations of the siphon drain pipe

[0056] In this embodiment, no buffer cavity 151 and paddle wheel 152 are provided in the siphon drain pipe 15. Generally, it is considered that the mud content of the municipal sewage in the drainage pipe 11 is generally above 99.5%, so it is considered that the flow law of the sewage follows the general fluid law, and the calculation is carried out according to the hydraulics uniform flow formula.

[0057] Calculation formula for the head loss of the siphon drain pipe 15 pipeline: h = h j +hi

[0058]

[0059] Wherein:

[0060] h represents the total head loss (m);

[0061] h j represents the frictional head loss (m);

[0062] h i represents the local head loss (m);

[0063] v represents the average cross-sectional velocity (m / s);

[0064] l represents the total length of the siphonic drain pipe (m);

[0065] d represents the diameter of the siphonic drain pipe (m);

[0066] R represents the hydraulic radius (m);

[0067] ξ represents the local head loss coefficient.

[0068] Figure 13 The routing of the siphonic drain pipe 15 is exemplified. According to the routing of this design, ξ = 4.62. UPVC pipes are used in this design. For example:

[0069] ① For the siphonic drain pipe 15 with a diameter d = 0.15 m, the total length of the siphonic drain pipe 15 is taken as l = 2 m, and the average velocity of the siphonic drain pipe 15 is taken as v = 0.70 m / s. After calculation, the sewage flow rate Q = 0.0124 m 3 / s, and the total head loss h = 0.34 m. That is to say, when the water surface pressure difference H before and after the baffle 123 is greater than 0.34 m, the siphonic drain pipe 15 will quickly suck the sewage, and the higher the water surface pressure difference before and after, the better the sucking effect;

[0070] ② For the siphonic drain pipe 15 with a diameter d = 0.20 m, the total length of the siphonic drain pipe 15 is taken as l = 2 m, and the average velocity of the siphonic drain pipe 15 is taken as v = 0.70 m / s. After calculation, the sewage flow rate Q = 0.022 m 3 / s, and the total head loss h = 0.27 m. That is to say, when the water surface pressure difference H before and after the baffle 123 is greater than 0.27 m, the siphonic drain pipe 15 will quickly suck the sewage.

[0071] Comparing the two schemes, it can be seen that the greater the water surface pressure difference H before and after the baffle 123, the larger the diameter d of the siphonic drainage pipe, the greater the drainage flow rate, and the better the suction effect. However, considering economy and applicability, the water surface pressure difference H before and after the baffle 123 should be ≥ 0.35 m. Therefore, this design scheme is applicable to the modification of drainage pipes 11 above DN800, and the siphonic drainage pipe 15 is recommended to be DN100 - DN200.

[0072] (2) Calculation related to the baffle

[0073] Calculating with rainwater in full flow, according to the law of conservation of momentum, the impact force of the water flow on the baffle 123

[0074] F·t = m·v

[0075] m = ρ·S·vt

[0076] That is, the impact force F = ρ·S·v 2

[0077] Among them:

[0078] S represents the projected area perpendicular to the water flow direction (m 2 )

[0079] v represents the flow velocity (m / s);

[0080] t represents the water flow impact time (s);

[0081] ρ represents the sewage density (kg / m 3 )

[0082] F represents the impact force (KN);

[0083] Therefore, the instantaneous impact force is a function of the density ρ, the flow velocity v, and the projected area S perpendicular to the water flow direction. And according to the following formula, the flow velocity v in the drainage pipe 1 is related to the wall roughness coefficient n, the hydraulic gradient I, and the hydraulic radius R.

[0084]

[0085] Among them:

[0086] Q represents the flow rate (m 3 / s);

[0087] A represents the cross-sectional area of water flow (m 2 )

[0088] v represents the flow velocity (m / s);

[0089] R represents the hydraulic radius (m);

[0090] I represents the hydraulic gradient (m 3 / s);

[0091] n represents the pipe wall roughness coefficient.

[0092] For simplicity of calculation, according to the "Code for Design of Outdoor Wastewater Disposal GB", when the drainage pipe 11 is made of reinforced concrete, 5.0m / s ≥ v ≥ 0.75m / s. Therefore, in the embodiment of the present invention, for the concrete rainwater pipe with a diameter of DN1000, that is, the drainage pipe 11 for discharging rainwater, the radius of the rainwater pipe r = 0.5m, and the flow velocity is taken as v = 1.0m / s. Before the unilateral baffle 123 rotates, since the area perpendicular to the water flow direction is the largest and the torque is also the largest, at this time

[0093] The area perpendicular to the water flow direction

[0094] Impact force

[0095] The acting arm relative to the rotation axis is Therefore, the torque for the baffle 123 is

[0096] M = F·l1 = 196.25×0.5÷2 = 49.06KN·m

[0097] When the designed spring pre-torque M1 = 3.0KN·m, since M > M1, the baffle 123 opens quickly.

[0098] On the segmental baffle 123, in the water flow direction, a resistance plate 171 is installed at an angle α = 30° with the baffle 123 and fixed with a support plate 172. The distance between the resistance plate 171 and the axis of the shaft The height of the baffle 123 is taken as

[0099] When the baffle 123 opens to the maximum (i.e., when the angle between the baffle and the water flow direction is 0)

[0100] At this time, the area perpendicular to the water flow

[0101] The impact force F1 = ρ·S1·v 2 = 1000×0.5×0.5÷3×tan30 = 48.11KN

[0102] The force perpendicular to the baffle direction is F’ = F1·sinα = 48.11×sin30° = 24.06KN

[0103] The torque is M’ = F'·l = 24.06×0.5×1 / 3 = 4.01KN·m

[0104] Also, because when the spring pre-torque M1 = 3.0KN·m, since M’ > M1, the baffle 123 remains in the open state.

[0105] As the rainy season ends and the water level gradually drops, when the impact torque of the water flow is less than the prefabricated torque of the spring M1 = 3.0 KN·m, the baffle 123 gradually closes under the action of the spring torque and resets to the original dry-season drainage state.

[0106] (3) Related calculations of the water level control group

[0107] The float 146 is a sphere, and its buoyancy calculation formula is:

[0108] F 浮 = ρ·g·V 排

[0109]

[0110] Where:

[0111] V 排 represents the volume of water displaced by the float (m 3 );

[0112] g represents the acceleration due to gravity (m / s 2 );

[0113] ρ represents the density of sewage (kg / m 3 );

[0114] r1 represents the radius of the float (m);

[0115] F 浮 represents the buoyancy (KN).

[0116] In this embodiment, a float 146 with a diameter of 20 cm is selected, and the radius r1 = 10 cm = 0.1 m. Then

[0117] F 浮 = ρ·g·V 排 = 1000×9.81×0.0042 = 41.08 KN

[0118] The maximum impact force of the water flow on the baffle 123 is calculated as F = 196.25 KN in (2).

[0119] Then the maximum impact force on the baffle 148 is

[0120] In this embodiment, the mass of the slider 142 and the baffle 148 assembly is tentatively set at 1 kg.

[0121] Then the gravity G = 9.81 KN;

[0122] The baffle 148 is made of steel fittings, and the contact part between the baffle 123 and the baffle 148 is still made of a steel plate surface. Then, according to relevant data, the static friction coefficient between the two steel surfaces is taken as μ = 0.2.

[0123] Then the static friction force f = μ·F2 = 0.2×98.13 = 19.63 KN

[0124] Then F 浮 > G + f, then the floating ball 146 pulls the baffle 148 to quickly float upward along the chute 141.

[0125] Working principle of the present invention: During the dry season, under the combined action of the baffle 148 on the water level control group 14 and the prefabricated torsion spring group 122, the rotary weir plate 12 is buckled with the steel seal ring 13 to achieve sealing, and the rotary weir plate 12 intercepts the sewage in the drainage pipe 11. When the water level of sewage with low flow velocity and small flow rate reaches the water storage level 181, the sewage enters the water storage cavity 173. When the water level reaches the siphon level 182, a siphon phenomenon occurs in the siphon drainage pipe 15, discharging the sewage and alluvium upstream of the rotary weir plate 12 to the downstream. Since the siphon suction is extremely rapid and the inlet end of the siphon drainage pipe 15 is at the bottom of the pipe, a strong bottom scouring water wave will be instantaneously formed, scouring the bottom sediment. By setting the cyclone-like device 16, hydraulic swirling can be carried out at the bottom of the pipe to form a swirl flow, scouring the pipe sediment, and achieving a better treatment effect. By setting the paddle impeller 152 and the swirl wheel 19 connected by transmission, when the siphon phenomenon occurs, the swirl wheel 19 can stir the sewage upstream of the cyclone-like device 16, making the water flow scour the bottom of the drainage pipe 11 more thoroughly. By setting the water storage cavity 173, when the upstream water level drops rapidly, the swirl wheel 19 can scour the sediment upstream of the cyclone-like device 16, which is beneficial for the siphon drainage pipe 15 to transport sediment. During the rainy season, as the rainfall runoff continuously increases, the water level in the drainage pipe 11 continuously rises. The float ball 146 gradually has buoyancy. When the water level reaches the first starting level 183, the buoyancy of the first float ball 146 reaches the maximum. Since the buoyancy of the float ball 146 > the gravity G of the slider 142 and the baffle 148 assembly + the static friction f between the baffle 148 and the baffle plate 123, the float ball 146 pulls the slider 142 to slide upward along the chute 141, and the baffle 148 will finally leave the baffle plate 123. Since the impact torsion received by the baffle plate 123 is greater than the prefabricated torsion of the prefabricated torsion spring group 122, the first rotary weir plate 12 rotates around the rotation axis 121, and the baffle plate 123 rotates towards the downstream of the first rotary weir plate 12. At the same time, the slider 142 enters the block groove 143. Because the water flow has an impact force on the float ball 146 towards the downstream, the float ball 146 and its linkage assembly move along the chute 141 to the downstream. When the water level continues to rise and reaches the second starting level 184, the buoyancy of the second float ball 146 reaches the maximum. The process is similar to the above. The second rotary weir plate 12 opens. Since both the left and right rotary weir plates 12 are fully opened to achieve the purpose of rapid drainage, this device does not affect drainage during the rainy season. After the rainstorm peak ends, the drainage flow gradually decreases. Since the water level gradually drops, the impact torsion of the water flow on the baffle plate 123 gradually decreases. When the impact torsion of the water flow drops below the torsion of the prefabricated spring group, the left and right rotary weir plates 12 start to reset. The rotary weir plate 12 pushes the toggle rod 145 to reset, and through the action of the toggle rod 145, the float ball 146 and the baffle 148 assembly are pulled back to the original state and reset through the chute 141.

[0126] The technical solutions of the embodiments in the present invention can be combined, and the technical features in the embodiments can also be combined to form new technical solutions. Structures that are not mentioned in the embodiments but can achieve the relevant functions in the embodiments are prior art.

[0127] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the said claims.

Claims

1. A weir plate interception and flushing device for drainage pipes based on siphon suction and float control, characterized in that include: A rotating weir plate, comprising a rotating shaft, a prefabricated torsion spring assembly, and a baffle, wherein one end of the rotating shaft is connected to the prefabricated torsion spring assembly, and the other end is connected to the bottom end of the drainage pipe, the prefabricated torsion spring assembly is connected to the top end of the drainage pipe, and the baffle is connected to the end of the rotating shaft away from the prefabricated torsion spring assembly, the prefabricated torsion spring assembly providing the rotating shaft with a prefabricated torsion force causing the baffle to rotate upstream; wherein the two baffles are symmetrical with respect to the vertical axial symmetry plane of the drainage pipe, the two baffles are spliced to form a circular segment, and the bottom end of the baffle is clearance-matched with the inner wall of the drainage pipe; A sealing ring, which is arc-shaped and connected to the inner wall of the drainage pipe, is provided on the upstream side of the rotating weir plate and limits the rotating weir plate; a water level control group, the water level control group being arranged downstream of the rotating weir plate, wherein in a first state, the water level control group is connected to the rotating weir plate and limits the rotating weir plate, and in a second state, the water level control group is separated from the rotating weir plate; a siphonic drain pipe, wherein the inlet end of the siphonic drain pipe is located upstream of the rotating weir plate and communicates with the bottom of the inner cavity of the drainage pipe, and the outlet end of the siphonic drain pipe is located downstream of the rotating weir plate and communicates with the side wall of the drainage pipe; The water level control group includes: A chute is provided in the drainage pipe, the chute is T-shaped, a reset member is provided in the horizontal groove of the chute, a slider is provided in the vertical groove of the chute, and the slider is slidably engaged with the chute; The reset member includes a block groove, a push rod and a toggle rod, one end of the toggle rod is rotatably connected to the drainage pipe, and the other end is located upstream of the baffle; one end of the push rod is connected to the middle part of the toggle rod, and the other end is connected to the block groove, the block groove is slidably matched with the slide groove, and the block groove is used to accommodate the slider; A float ball, the float ball is connected to the slider via a connecting rod, a baffle is connected below the float ball, and the baffle is used to limit the baffle; In the first state, the slider is engaged with the vertical groove of the slide, and in the second state, the slider is in the block groove; The sliding block is spherical, and the block groove is bowl-shaped with the opening facing downward; in the first state, the block groove is located above the vertical groove of the sliding groove.

2. The drain pipe weir plate interception and flushing device based on siphon suction and float control according to claim 1, characterized in that, The inlet end of the siphon type drain pipe is provided with a cyclone-like device, which can form a cyclone at the bottom of the water.

3. The drainage pipe weir plate interception and flushing device based on siphon suction and float control according to claim 2, characterized in that, The cyclone-like device includes a top plate and a bottom plate. The bottom plate is provided with a vertically penetrating water outlet, which is connected to the siphon drain pipe. A guide plate is provided between the top plate and the bottom plate, and a guide channel is formed between two adjacent guide plates.

4. The drain pipe weir plate interception and flushing device based on siphon suction and float control according to claim 1, characterized in that, The water level control group includes a first water level control group and a second water level control group. The first water level control group limits the first baffle, and the second water level control group limits the second baffle. Compared with the second slider in the second water level control group, the vertical stroke of the first slider in the first water level control group is shorter.

5. The drainage pipe weir plate interception and flushing device based on siphon suction and float control according to claim 1, characterized in that A resistance plate is provided on the upstream side of the baffle plate. One end of the resistance plate is connected to one end of the baffle plate close to the rotation axis to form an angle, and the other end of the resistance plate is connected to the baffle plate through a support plate.

6. The drainage pipe weir plate interception and flushing device based on siphon suction and float control according to claim 5, wherein A buffer chamber and a paddle impeller are provided in the siphon drain pipe. The length extension direction of the central axis of the paddle impeller is perpendicular to the water flow direction in the siphon drain pipe, and one end of the paddle impeller is located in the buffer chamber; A swirl wheel is vertically provided in the drain pipe, and the swirl wheel is in transmission connection with the paddle impeller.

7. The drain pipe weir plate interception and flushing device based on siphon suction and float control according to claim 6, characterized in that, A water storage chamber is formed between the resistance plate and the baffle plate; the swirl wheel includes a plurality of swirl vanes, a water outlet is provided on one side of the swirl vane, and the swirl wheel is of a rotationally symmetric shape; the water storage chamber is communicated with the water outlet through a water delivery pipe, and the water delivery pipe is provided with a torsion elimination component.

8. The drain pipe weir plate intercepting and flushing device based on siphon suction and float control according to claim 7, characterized in that, The water delivery pipe includes a first water delivery pipe and a second water delivery pipe; the torsion elimination component includes a first component and a second component. A water delivery cavity is provided in the second component. One end of the first component is matched with the inner wall of the water delivery cavity through a ball, and the other end penetrates through the water delivery cavity; the first water delivery pipe penetrates through the first component and is communicated with the water delivery cavity, and the second water delivery pipe penetrates through the second component and is communicated with the water delivery cavity.

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