A municipal road initial rainwater interception and purification mechanism

Abstract

The application relates to the technical field of municipal road rainwater treatment facilities, in particular to a municipal road initial rainwater interception and purification mechanism. Road inflow is distributed to an interception path and a bypass path through a water inlet distribution cavity; a water inlet closure and a water outlet closure are arranged at an interception water inlet and a treatment water outlet respectively; and two closures are sequentially driven through a cylindrical cam on the same driving shaft and two cam guide grooves, so that the interception water inlet is closed first when the collection state is converted into the treatment state, the treatment water outlet is opened after passing through an isolation section with the two closures being closed at the same time, intercepted rainwater is treated through an adjustable flow piece, a particle filtering unit and an adsorption unit and then enters a purification drainage channel, a sampling port is arranged upstream of a check valve, and the check valve is used for reducing the risk of downstream water body backflow to the purification assembly. The mechanism also controls treatment retention and reset according to the interception cavity liquid level and the inflow state, so that the interception, isolation, purification treatment and subsequent inflow bypass of the initial rainwater are realized.

Description

Technical Field

[0001] This invention relates to the technical field of municipal road rainwater treatment facilities, specifically a mechanism for intercepting and purifying initial rainwater runoff from municipal roads. Background Technology

[0002] Road runoff can carry road surface sediments, suspended particles, and pollutants that are bound to or dissolved in water. Collecting and treating a predetermined amount of initial runoff during rainfall is a technical approach to road runoff pollution control. "Initial runoff" refers to rainwater intercepted by an organization during the initial collection phase of a water event, and is not defined by the requirement that the water quality necessarily reaches a certain concentration.

[0003] For interception structures that connect the water storage space to the filtration unit, if water is continuously drained into the filtration unit during the collection process, the water level in the storage space is determined by both the inflow and filtration flow rates. If the flux changes due to filter material contamination, blockage, or replacement, the cumulative inflow before reaching the same water level may change, introducing uncertainty to the amount of water intercepted. For structures that control the interception outlet through the water storage level, if the intercepted water is discharged and then immediately resumed as the water level drops, subsequent runoff from the same rainfall event may re-enter the storage space, increasing the treatment load and disturbing already deposited pollutants. Furthermore, treating the closure of the interception outlet and the opening of the treatment outlet as two independent actions without reliable sequential constraints may result in both outlets opening simultaneously, allowing runoff to directly cross the treatment path.

[0004] Based on the aforementioned problems, this technical solution designs a mechanism for intercepting and purifying initial rainwater runoff from municipal roads. Summary of the Invention

[0005] The purpose of this invention is to provide a mechanism for intercepting and purifying initial rainwater runoff from municipal roads, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a municipal road initial rainwater interception and purification mechanism, comprising a well body, wherein the well body is provided with a road rainwater inlet, a water inlet distribution chamber, an interception chamber, a bypass channel and a drainage outlet, the road rainwater inlet is connected to the water inlet distribution chamber, the water inlet distribution chamber is connected to the interception chamber through an interception inlet and is connected to the bypass channel through a bypass overflow outlet, and the bypass channel is connected to the drainage outlet; A water inlet seal is installed at the interception inlet, and a treatment outlet is installed on the side of the interception chamber. A water outlet seal is installed at the treatment outlet. A drive mechanism is installed on the upper part of the well body. The drive mechanism is connected to the drive shaft. A cylindrical cam is fixed on the drive shaft. The cylindrical cam forms a first cam guide groove and a second cam guide groove. The first cam guide groove and the second cam guide groove drive the water inlet seal and the water outlet seal respectively through a driven member and a transmission rod. When the drive shaft rotates from the collection position to the treatment position, the water inlet seal first closes the interception inlet. After passing through the common closing section where the water inlet seal and the water outlet seal are closed simultaneously, the water outlet seal opens the treatment outlet. When the drive shaft rotates in the opposite direction from the treatment position to the collection position, the water outlet seal first closes the treatment outlet. After passing through the common closing section, the water inlet seal opens the interception inlet. An inlet shut-off position feedback switch is installed at the inlet seal, and an outlet shut-off position feedback switch is installed at the outlet seal. The controller controls the drive mechanism based on the signals from the inlet shut-off position feedback switches and the outlet shut-off position feedback switches. Downstream of the treated water outlet, an adjustable flow element, a particle filter unit, and an adsorption unit are installed in sequence. The outlet side of the adsorption unit is connected to the purified drainage channel, and the purified drainage channel is connected to the drainage outlet.

[0007] As a further aspect of the present invention: both the inlet sealing component and the outlet sealing component include a valve disc that mates with the corresponding valve port and a valve stem connected to the valve disc. A valve seat is provided around the periphery of the corresponding valve port, and an elastic sealing strip is provided around the lower periphery of the valve disc. When the valve disc moves downward, the elastic sealing strip presses against the valve seat to close the corresponding valve port, and when the valve disc moves upward, it leaves the valve seat to open the corresponding valve port. Each valve stem extends upward through a guide sleeve fixed to the corresponding valve body cover plate, and a sealing ring is provided between the guide sleeve and the valve stem. The valve disc, valve stem, and corresponding transmission rod are arranged coaxially.

[0008] As a further aspect of the present invention: a floating preload connection is adopted between the valve stem and the transmission rod. A spring sleeve is provided at the lower end of each transmission rod. An upper spring seat is formed at the top of the spring sleeve, and an inward return limit part with a valve stem through hole is formed at the bottom. A load-bearing flange is provided at the upper part of the valve stem. The load-bearing flange is located inside the spring sleeve and can slide vertically relative to the spring sleeve. The upper end of the valve stem and the lower end of the transmission rod are separated from each other. The preload spring is sleeved on the outside of the valve stem and sandwiched between the upper spring seat and the load-bearing flange.

[0009] As a further embodiment of the present invention: the axle of each driven member is fixed on the corresponding slide, the slide moves along a linear guide rail parallel to the drive shaft, and each slide is sequentially connected to a first hinge link, a steering rocker arm, a second hinge link, and a vertical guide slider. One end of the first hinge link is hinged to the slide, and the other end is hinged to the input arm end of the steering rocker arm. The middle fulcrum of the steering rocker arm is supported on a fixed support by a pin. The output arm end of the steering rocker arm is connected to the vertical guide slider via the second hinge link, and the transmission rod is fixed on the vertical guide slider.

[0010] As a further aspect of the present invention: the collection position of the drive shaft is 0°, and the processing position is 90°; when the drive shaft rotates from 0° to 90°, the inlet seal completes descent, seating, and pre-pressurization within the 0° to 30° range, while the outlet seal remains closed at the processing outlet; the 30° to 60° range is a common closing section where both the inlet and outlet seals are closed simultaneously; within the 60° to 90° range, the inlet seal remains closed, while the outlet seal opens at the processing outlet; an isolation section position detection element is provided at one end of the drive shaft.

[0011] As a further aspect of the present invention: the trigger of the inlet water shut-off position feedback switch is fixed on the valve stem rigidly connected to the inlet water valve disc, and the trigger of the outlet water shut-off position feedback switch is fixed on the valve stem rigidly connected to the outlet water valve disc; when the drive shaft changes from the collection position to the processing position and reaches the isolation confirmation position within the common shut-off section, the controller allows the drive shaft to continue rotating towards the processing position after obtaining a stable inlet water shut-off position feedback signal; when the drive shaft reverses from the processing position to the collection position and reaches the isolation confirmation position, the controller allows the drive shaft to continue rotating towards the collection position after obtaining a stable outlet water shut-off position feedback signal and then opens the intercepting inlet.

[0012] As a further embodiment of the present invention: a positioning disk is provided on the drive shaft, a processing position positioning hole is provided on the end face of the positioning disk, a spring positioning pin is provided in the stationary guide seat fixed to the well body, and an electric release component is provided on the side of the spring positioning pin away from the positioning disk and connected to the pin body of the spring positioning pin; when the drive shaft reaches the processing position, the spring positioning pin enters the processing position positioning hole to restrict the rotation of the positioning disk and the drive shaft; the electric release component is provided with a pin retraction feedback contact, and the pin body of the spring positioning pin or the armature connected to it is provided with a pin insertion position feedback.

[0013] As a further aspect of the present invention: a sampling port and a check valve are provided on the purified drainage channel. Along the drainage direction of the purified water, the sampling port is located on the outlet side of the adsorption unit and upstream of the check valve. The check valve is located between the sampling port and the drainage outlet. The particle filtration unit and the adsorption unit are installed in a stacked housing with the inlet at the top and the outlet at the bottom. The particle filtration unit is located on the upper layer and the adsorption unit is located on the lower layer. Both the particle filtration unit and the adsorption unit are made into detachable filter boxes with extraction parts.

[0014] As a further aspect of the present invention: a static water cylinder is provided on the side wall of the interception chamber, and the static water cylinder and the interception chamber are kept in liquid communication. A liquid level detection device is provided inside the static water cylinder; a flow measuring channel is provided upstream of the interception inlet and the bypass overflow outlet, and an incoming water detection device is provided at the flow measuring channel. The incoming water detection device is connected to the controller signal; the controller receives signals from the liquid level detection device, the incoming water detection device, the inlet water shut-off position feedback switch, the outlet water shut-off position feedback switch, and the isolation section position detection device; when the continuous period without incoming water reaches the set interval, the liquid level in the interception chamber is not higher than the reset liquid level, and the incoming water, liquid level, position, and lock-up feedback are all valid and there are no unresolved faults, the controller control mechanism resets from the processing position to the collection position.

[0015] As a further embodiment of the present invention: a debris-blocking basket is installed below the inner side of the road stormwater inlet, a sludge collection trough is installed at the bottom of the interception chamber, the sludge collection trough is connected to the maintenance sludge discharge interface, a slag-blocking cover is installed upstream of the treatment outlet, and a vent pipe is installed at the upper part of the interception chamber; an emergency overflow channel is also installed in the well body, which is separated from the interception chamber. The inlet of the emergency overflow channel is located upstream of the debris-blocking basket and is higher than the inlet water level under normal interception conditions. The downstream end of the emergency overflow channel is connected to the drainage outlet, and the emergency overflow channel is not connected to the interception chamber.

[0016] Compared with the prior art, the beneficial effects of the present invention are: by using the same drive shaft and two cam guide grooves on the cylindrical cam to form a definite mechanical opening and closing sequence for the inlet and outlet closures, the mechanism can first close the intercepting inlet and then open the processing outlet after passing through the isolation section where the two closures are closed simultaneously when the mechanism is switching from the collection state to the processing state. When returning from the processing state to the collection state, the processing outlet can first close and the intercepting inlet can be opened after confirming that it is actually closed. The switching sequence of the two outlets is constrained from both structural and control perspectives. The actual sealing status is checked against the drive shaft position by the inlet water shut-off position feedback switch, the outlet water shut-off position feedback switch and the isolation section position detection device, so as to avoid judging whether the sealing component has been seated based solely on the position of the drive shaft or the position of the transmission components. Rainwater is intercepted and enters the purified drainage channel after passing through the adjustable flow element, the particle filter unit and the adsorption unit, and the sampling port is located upstream of the check valve. This is beneficial for obtaining treated water samples and reducing the impact of residual water or top water on the drainage outlet side on the sampling. At the same time, the check valve reduces the risk of downstream water flowing back into the purification components. By jointly determining the treatment, maintenance, and reset conditions through liquid level detection and incoming water detection, subsequent incoming water during the treatment period enters the bypass path, and the collection state is prematurely restored simply because the liquid level in the interception chamber drops. This improves the certainty of the sequence of interception, isolation, treatment, and reset processes, as well as the reliability of the operational status judgment. Attached Figure Description

[0017] Figure 1 This is an overall unfolded sectional view of the present invention.

[0018] Figure 2 This is an unfolded diagram of the sequential flow distribution assembly and transmission connection in the invention, showing the cam, slide, steering rocker arm and vertical transmission relationship when both closed parts are closed.

[0019] Figure 3 This is a schematic diagram showing the relationship between the normalized effective opening lift of the two sealing components and the rotation angle of the drive shaft in the invention. 30° to 60° represents the common closing section; the curves marked 7 and 9 in the figure correspond to the inlet sealing component and the outlet sealing component, respectively.

[0020] Figure 4 A partially expanded sectional view of the lower part of the retention chamber and the purification components.

[0021] Figure 5 This is a control state transition diagram for the invention.

[0022] Figure 6 This is a front view of the position holding component in the invention and an axial sectional view unfolded along the position of the positioning hole.

[0023] Figure 7 This diagram illustrates the relationship between the two enclosures and the bypass path under the three states of collection, isolation, and processing in the invention.

[0024] Figure 8 This is a partially enlarged sectional view of the sealing element, valve seat, guide seal, and pre-pressure connection in the invention, wherein... Figure 8 (a) The water inlet seal is open. Figure 8 (b) The water outlet seal is closed.

[0025] Figure 9 This is an isometric disassembly and assembly diagram of the purification components in the invention, showing the clamping frame, particle filter box, adsorption filter box, and partially cut-open mounting housing.

[0026] The components include: well body 1, road rainwater inlet 2, debris basket 3, water inlet distribution chamber 4, interception chamber 5, interception inlet 6, water inlet seal 7, treated water outlet 8, water outlet seal 9, bypass overflow outlet 10, bypass channel 11, drainage outlet 12, particle filter unit 13, adsorption unit 14, purified drainage channel 15, adjustable flow element 16, sludge collection tank 17, maintenance sludge discharge interface 18, slag baffle 19, drive shaft 20, cylindrical cam 21, first cam guide groove 22, and the second... 23. Cam guide groove, 24. Follower, 25. Transmission rod, 26. Preload spring, 27. Drive mechanism, 28. Positioning plate, 29. Spring positioning pin, 30. Electric release component, 31. Still water cylinder, 32. Liquid level detection component, 33. Incoming water detection component, 34. Controller, 35. Inlet water closed position feedback switch, 36. Emergency overflow channel, 37. Check valve, 38. Sampling port, 39. Partition plate, 40. Inspection port, 41. Vent pipe, 42. Isolation section position detection component, 43. Outlet water closed position feedback switch. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0028] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Please see Figure 1-3 An initial rainwater interception and purification mechanism for municipal roads is disclosed in this embodiment. The mechanism uses a well body 1 as the main supporting structure. The well body 1 is located below or near the rainwater collection inlet of the road. One side of the well body 1 is provided with a road rainwater inlet 2 for receiving the rainwater flowing from the road. The top of the well body 1 is provided with an inspection port 40, which corresponds to the maintenance area on the upper part of the well body 1, so as to install, inspect and maintain the mechanical and electrical components inside the well. A controller 34 is provided in the maintenance area. The controller 34 is used to receive the detection signals of the detection components described later and control the operation of the drive mechanism. The well body 1 is composed of a precast concrete shell and internal corrosion-resistant components. The load-bearing capacity of its load-bearing cover plate and inspection port 40 is designed separately according to the load requirements of the installation location.

[0032] A removable debris trap 3 is installed on the lower inner side of the road stormwater inlet 2. The debris trap 3 is used to intercept larger debris such as leaves and plastics that enter the well body 1, and can be lifted upwards along its installation guide rail for cleaning. Downstream of the debris trap 3, a water inlet distribution chamber 4 is installed. The rainwater entering the road stormwater inlet 2 enters the water inlet distribution chamber 4 after passing through the debris trap 3, and is then distributed by the water inlet distribution chamber 4 to the interception branch and bypass branch. Specifically, the bottom of the water inlet distribution chamber 4 is connected to the interception inlet 6 through a guide channel, and the bottom of the interception inlet 6 is connected to the interception chamber 5, so that the rainwater in the water inlet distribution chamber 4 can enter the interception chamber 5 downward through the interception inlet 6; the water inlet distribution chamber 4 is provided with a bypass overflow port 10 on the side above the guide channel, and the outlet end of the bypass overflow port 10 is connected to the bypass channel 11 provided on the side of the well body 1. The bottom end of the bypass channel 11 is connected to the drainage outlet 12. A partition 39 is provided between the interception chamber 5 and the bypass channel 11. The partition 39 extends from the adjacent area of ​​the two and separates the two water paths, so that the bypass water that crosses the bypass overflow port 10 does not enter the interception chamber 5, but flows directly to the drainage outlet 12 through the bypass channel 11.

[0033] Furthermore, a downwardly recessed sludge collection trough 17 is provided at the bottom of the interception chamber 5. The sludge collection trough 17 is used to collect the mud and sand that settle to the bottom of the interception chamber 5. The bottom side of the sludge collection trough 17 is connected to a maintenance sludge discharge interface 18. The maintenance sludge discharge interface 18 is closed during normal operation and can be connected to a suction device to discharge the sediment in the sludge collection trough 17 during maintenance. A treatment outlet 8 is provided on the side of the interception chamber 5, above the sludge collection trough 17. The treatment outlet 8 is used to guide the intercepted rainwater in the interception chamber 5 to the purification components described later during the treatment stage. A slag baffle 19 is provided upstream of the treatment outlet 8. The slag baffle 19 covers the top and side of the treatment outlet 8. A water passage gap is left between its lower edge and the bottom of the interception chamber 5 to reduce the entry of floating objects and larger debris into the treatment branch. A vent pipe 41 is also provided at the top of the interception chamber 5. The top of the vent pipe 41 is higher than the designed maximum operating water level and is used to ventilate the interception chamber 5 with the outside when water is entering and exiting, so as to avoid the formation of airlock. Preferably, an insect-proof net is provided at the top of the ventilator 41 to prevent external insects from entering the ventilator 41 and causing blockages or other problems.

[0034] It should be noted that the effective water flow capacity of the intercepting inlet 6 is determined according to the selected design interception flow rate. When the intercepting inlet 6 is open, the interception chamber 5 has not reached the set interception liquid level and the incoming water flow does not exceed the design interception flow rate, the water level in the water distribution chamber 4 is lower than the bypass overflow port 10. The incoming water preferentially enters the interception chamber 5 through the intercepting inlet 6. When the incoming water volume exceeds the design interception capacity, the water level in the water distribution chamber 4 can rise above the bypass overflow port 10, so that the part of the water volume exceeding the interception capacity enters the bypass channel 11. It should be noted that this situation is an over-bypass, which does not mean that all the upstream runoff of this water inflow event has been intercepted. During normal operation, except for intercepting the inlet 6, the treatment outlet 8 and the vent pipe 41, all other maintenance openings connected to the liquid should be kept closed.

[0035] Furthermore, such as Figure 2 , Figure 7 , Figure 8 As shown, in order to control the on / off of the interception branch and the treatment branch respectively, an inlet sealing component 7 is installed at the interception inlet 6 and an outlet sealing component 9 is installed at the treatment outlet 8. Both the inlet sealing element 7 and the outlet sealing element 9 adopt a vertical lifting valve disc structure. Specifically, each sealing element includes a valve disc that mates with the corresponding valve port and a valve stem connected to the valve disc. A valve seat is provided around the periphery of the corresponding valve port, and an elastic sealing strip is provided around the lower periphery of the valve disc. When the valve disc moves downward, the elastic sealing strip presses against the valve seat to close the corresponding valve port. When the valve disc moves upward, it leaves the valve seat to open the corresponding valve port. Each valve stem extends upward through a guide sleeve fixed to the corresponding valve body cover plate. The guide sleeve is used to guide the valve stem radially. A sealing ring is provided between the guide sleeve and the valve stem to reduce rainwater leakage upward along the valve stem. The valve body cover plate and the valve body are connected by detachable fasteners and sealing gaskets. Preferably, the valve disc, valve stem, and transmission rod 25 (described later) are arranged coaxially, and the valve stem and transmission rod 25 are connected by a floating preload connection.

[0036] like Figure 2 As shown, in order to enable the inlet seal 7 and the outlet seal 9 to be linked in a predetermined order, a drive mechanism 27 is provided in the maintenance area at the top of the well body 1. The output end of the drive mechanism 27 is connected to the horizontally arranged drive shaft 20. The drive shaft 20 is supported by a bearing support. A cylindrical cam 21 is fixed circumferentially on the drive shaft 20. A first cam guide groove 22 and a second cam guide groove 23 are formed on the outer cylindrical surface of the cylindrical cam 21. The first cam guide groove 22 and the second cam guide groove 23 extend circumferentially along the cylindrical cam 21 and are offset from each other axially. A driven roller is provided in each cam guide groove as a driven member 24. The wheel axle of the driven member 24 is fixed on the corresponding slide. All slides move along a linear guide rail parallel to the drive shaft 20. The two side walls of the first cam guide groove 22 and the second cam guide groove 23 can transmit driving forces in opposite directions to the corresponding driven members 24, so that the reciprocating motion of the two transmission chains is constrained by the groove profile of the same cylindrical cam 21, without relying on the return of the valve disc by its own weight.

[0037] Furthermore, in order to convert the axial movement of the slide where the follower 24 is located into the vertical movement required by the inlet seal 7 and the outlet seal 9, each slide is sequentially connected to a first hinge link, a steering rocker arm, a second hinge link, and a vertical guide slider: one end of the first hinge link is hinged to the slide, and the other end is hinged to the input arm end of the steering rocker arm. The middle fulcrum of the steering rocker arm is supported on a fixed support by a pin, and its output arm end is connected to the vertical guide slider via the second hinge link. The transmission rod 25 is fixed on the vertical guide slider and moves vertically with the vertical guide slider. The two arms of the steering rocker arm are set at an angle, and the two hinge links are adapted to the arc trajectories of the input arm end and the output arm end, respectively, thereby avoiding the rigid direct connection between the slide and the valve stem that move along different straight lines. The two transmission chains are arranged in staggered mounting planes to avoid mutual interference between the links and to make the working range of the steering rocker arm avoid the dead point position where the link and the rocker arm are collinear.

[0038] Furthermore, such as Figure 8 As shown, in order to maintain a stable valve seat clamping force after the two closures are closed, a spring sleeve is provided at the lower end of each transmission rod 25. The top of the spring sleeve forms an upper spring seat, and the bottom forms an inward return limit part with a valve stem through hole. A load-bearing flange is provided at the upper part of the valve stem corresponding to the closure. The load-bearing flange is located inside the spring sleeve and can slide vertically relative to the spring sleeve. The upper end of the valve stem is separated from the lower end of the transmission rod 25. The preload spring 26 is sleeved on the outside of the valve stem and sandwiched between the upper spring seat and the load-bearing flange, so that the downward pressing movement of the transmission rod 25 transmits the clamping force to the valve stem and valve disc through the preload spring 26, while retaining the additional preload stroke after the valve disc is seated.

[0039] When closed, the spring sleeve moves downward, and the spring pushes the load-bearing flange and valve disc downward. After the valve disc sits, the valve stem stops descending, while the sleeve continues to move downward for a pre-compression stroke, further compressing the spring and forming a sealing force. When opened, the spring sleeve first moves upward to remove the additional pre-compression, and then the return limiting part abuts against the load-bearing flange from below, forcibly lifting the valve stem and valve disc away from the valve seat. Sufficient compression stroke is retained inside the spring sleeve, and the spring must not coil at the maximum compression position. The tensile bearing capacity of the limiting part is selected according to the maximum load when opening.

[0040] It is important to note that the spring force in the closed holding position should be greater than the sum of the maximum adverse pressure differential force, the guide friction force, and the required sealing contact force. For example, taking a circular valve port as an example, the initial selection is based on F_spring ≥ K × (Δp × A_valve + F_friction + F_tightness); Where Δp represents the pressure difference between the most unfavorable sides, A_valve represents the effective pressure-bearing area, and K is the selected load margin coefficient; then check the allowable compression of the sealing strip. For example: taking a valve port diameter of 80 mm and an unfavorable head difference of 1 m, the water pressure is approximately 49.3 N; if F_friction + F_sealing is estimated at 20 N and K is taken as 1.4, the required closing spring force is approximately 97 N, and 100 N can be selected as the starting point for design calculations. The values ​​in this set are only used for selection calculations; the actual friction and sealing force should be confirmed by component data or actual measurements and cannot be taken as the results of completed tests.

[0041] Furthermore, such as Figure 3 , Figure 7 As shown, with the collection position of drive shaft 20 at 0° and the processing position at 90°, when drive shaft 20 rotates from 0° to 90° in the forward direction: Within the range of 0° to 30°, the inlet seal 7 completes the descent, seating and pre-pressurization, while the outlet seal 9 keeps the valve seat of the outlet 8 pressed tightly. The 30° to 60° section is a common closed section where the inlet seal 7 and the outlet seal 9 are closed simultaneously. This common closed section constitutes an isolation section between the collection state and the treatment state. Within the range of 60° to 90°, the inlet seal 7 remains closed, while the outlet seal 9 releases the pre-pressure and rises to the open position; The normal operating stroke of the drive mechanism 27 is limited to between 0° and 90°, and does not exceed this stroke along the other circumference of the cylindrical cam 21. Qi, Figure 3 The effective opening lift of the two valve discs is not shown proportionally. The compression stroke of the preload spring 26 after the valve discs are seated is not shown proportionally. The specific driving displacement is determined by the following motion function.

[0042] As a preferred method in an embodiment of the present invention, to clarify the method for generating the guide groove, a positive rotation angle θ∈[0°,90°] is defined, and a smoothing function S(u)=10u is used. 3 -15u 4 +6u 5 , where 0≤u≤1, and the first and second derivatives of S at both ends are zero; Let H7 and H9 be the effective lift strokes of the two valve discs when fully open, and δ7 and δ9 be the additional strokes of the sleeve from the position where the return limit part contacts the load-bearing flange to the closed holding position. The sleeve command positions y7 and y9 are defined as zero when the valve disc is just seated and the return limit part just contacts the load-bearing flange, and positive when moving upward.

[0043] When 0°≤θ≤30°, y7=H7-(H7+δ7)S(θ / 30°); When 30°≤θ≤90°, y7=-δ7; When 0°≤θ≤60°, y9=-δ9; When 60°≤θ≤90°, y9=-δ9+(H9+δ9)S((θ-60°) / 30°); That is, ignoring the elastic deformation of the seal, the effective opening strokes of the two valve discs are max(y7,0) and max(y9,0), respectively, so that they can close together covering at least 30° to 60°, and there can be additional closing strokes outside the endpoints for unloading or building pre-pressure.

[0044] in, Figure 3 This only summarizes the on / off relationship.

[0045] Furthermore, after determining the position of the slide guide rail, the length of the two connecting rods, and the length of the rocker arm, the axial slide coordinates x7(θ) and x9(θ) at each corner are solved according to the fixed length constraints of the two connecting rods, using y7 and y9 as vertical output constraints. Continuous motion branches that avoid dead points are selected. After the cylindrical surface is unfolded, the roller center trajectory is obtained with s = Rθ as the circumferential coordinate and x as the axial coordinate, where R is the reference radius of the roller center trajectory. When calculating s, θ is in radians. Then, the two groove walls are obtained according to the roller radius and the required clearance envelope. The pressure angle, minimum radius of curvature, axial distance between the two grooves, and roller envelope interference are checked.

[0046] It should be noted that this method links the required valve disc movement to the machinable groove wall, rather than directly following the... Figure 2 The schematic line processing.

[0047] Specifically, drive stroke limits are set at 0° and 90°. Continuous return grooves can be set in the unused circumferential area of ​​the cylinder, but the working mechanism must not cross the limit to enter this area. When the isolation confirmation angle is 45°, the total angle of position measurement error, assembly error, and shutdown overtravel should be less than 15° with a margin, so that the isolation confirmation and shutdown processes both fall within the range of 30° to 60°. The errors in the closing lift and preload stroke must not completely consume the entire common closing section.

[0048] Furthermore, when the drive shaft 20 returns from 90° to 0°, the first cam guide groove 22 and the second cam guide groove 23 drive the corresponding follower 24 in reverse according to the above contour. Therefore, the water outlet seal 9 first closes the water outlet 8, and then the drive shaft 20 passes through the isolation section where both seals are closed, and then the water inlet seal 7 opens the water inlet 6. Since the two seals share the same drive shaft 20 and cylindrical cam 21, the controller 34 cannot change the opening and closing sequence determined by the cam geometry by controlling the two independent actuators separately.

[0049] To confirm that the intercepting inlet 6 and the treated outlet 8 have been reliably closed, an inlet closing position feedback switch 35 is installed at the inlet sealing component 7, and an outlet closing position feedback switch 43 is installed at the outlet sealing component 9. The trigger of the inlet closing position feedback switch 35 is fixed to the valve stem rigidly connected to the inlet valve disc, and the trigger of the outlet closing position feedback switch 43 is fixed to the valve stem rigidly connected to the outlet valve disc. The switch bodies of the two feedback switches are respectively fixed to the corresponding stationary brackets, thereby avoiding misjudgment that the corresponding valve disc has been seated simply because the transmission rod 25, the spring sleeve, or the drive shaft 20 has moved to the predetermined position.

[0050] To detect whether the drive shaft 20 has entered the aforementioned isolation section, an isolation section position detection element 42 is provided at one end of the drive shaft 20. In this embodiment, the isolation section position detection element 42 adopts an absolute position encoder coaxially connected to the drive shaft 20, and the encoder housing is fixed on a stationary bracket. The controller 34 receives signals from the inlet water close position feedback switch 35, the outlet water close position feedback switch 43, and the isolation section position detection element 42, and compares the angular position of the drive shaft 20 with the 0°, 45°, and 90° position windows.

[0051] When the drive shaft 20 rotates forward from the 0° collection position to the 90° processing position and runs to the isolation confirmation position near 45°, the controller 34 pauses the drive mechanism 27. Only after receiving a stable water inlet closing position feedback signal and confirming that the water inlet seal 7 has been seated and closed the intercepting water inlet 6, is the drive shaft 20 allowed to continue rotating to the 90° processing position. If the water inlet closing position feedback signal is not obtained within the specified confirmation time, the controller 34 stops the drive mechanism 27 and latches the fault, and does not perform the subsequent action of opening the processing outlet 8.

[0052] When the drive shaft 20 reverses from the 90° processing position to the 0° collection position and enters the common closing section, the controller 34 pauses the drive mechanism 27 at the isolation confirmation position near 45°. Only after receiving a stable water outlet closing position feedback signal and confirming that the water outlet seal 9 has been seated and closed the processing water outlet 8, is the drive shaft 20 allowed to continue rotating towards the 0° collection position and then the intercepting water inlet 6 is opened. If the water outlet closing position feedback signal is not obtained within the specified confirmation time, the controller 34 stops the drive mechanism 27 and latches the fault, keeping the water inlet seal 7 closed and not performing the subsequent action of opening the intercepting water inlet 6.

[0053] The inlet water closed position feedback switch 35 and the outlet water closed position feedback switch 43 are used to confirm that the corresponding valve disc has reached the closed seat position, and do not replace the valve seat seal leakage test. In the event of valve stem or transmission component breakage, sealing component jamming, cylindrical cam 21 damage, or inconsistency between the position feedback signal and the drive shaft angular position, it is not permissible to infer that the actual water circuit has been closed based solely on the angle signal of the drive shaft 20. The controller 34 should stop state transition and lock the fault, and operation can only be resumed after the actual valve position is verified and the fault is eliminated.

[0054] Furthermore, such as Figure 6 As shown, in order to prevent the drive shaft 20 from returning to the collection position on its own during the processing stage, a holding assembly consisting of a positioning plate 28, a spring positioning pin 29 and an electric release component 30 is provided on the drive shaft 20. Specifically, the positioning disk 28 is connected to the drive shaft 20 via a key and is fixed axially. The end face of the positioning disk 28 is provided with a processing position positioning hole at a position off-center from the axis. The pin body of the spring positioning pin 29 is installed in a stationary guide seat fixed to the well body 1, and its pin axis direction is parallel to the drive shaft 20. The return spring on the pin body causes the pin end to extend toward the end face of the positioning disk 28. When the drive shaft 20 rotates to the 90° processing position, the pin end of the spring positioning pin 29 enters the processing position positioning hole and restricts the rotation of the positioning disk 28 and the drive shaft 20. The electric release component 30 is located on the side of the spring positioning pin 29 away from the positioning disk 28 and is connected to the pin body. Preferably, the electric release component 30 adopts a linear electromagnetic actuator, which overcomes the action of the return spring when energized to make the pin end exit the processing position positioning hole, and does not actively retract the pin when de-energized; the end of the positioning pin and the entrance of the positioning hole are provided with an inlet chamfer, while the pin section bearing the holding load and the hole wall adopt a straight wall fit to reduce the pin retraction component force generated by the holding torque along the chamfer.

[0055] To detect the locking and releasing states of the holding components, the electric release component 30 is equipped with a retraction pin feedback contact, and the pin body of the spring positioning pin 29 or its connected armature is also equipped with an insertion pin position feedback. After the drive shaft 20 reaches the 90° processing position, the controller 34 de-energizes the electric release component 30, and the spring positioning pin 29 enters the processing position positioning hole of the positioning disk 28 under the action of the return spring. After confirming the insertion pin position feedback, the controller 34 records the current state as processing lock. If no insertion pin position feedback is obtained, the drive mechanism 27 keeps the drive shaft 20 in the processing position and the controller 34 outputs a locking fault, preventing the self-locking state of the reduction transmission from being mistakenly recorded as the spring positioning pin 29 being inserted.

[0056] Before the mechanism needs to be reset from the processing position to the collection position, the controller 34 first energizes the electric release component 30, causing the spring positioning pin 29 to exit the processing position positioning hole of the positioning disk 28, and confirms the pin retraction feedback within the preset release time limit; before obtaining the release confirmation, the controller 34 prohibits the drive mechanism 27 from reversing; if the spring positioning pin 29 fails to retract, without forcibly driving the positioning disk 28 by increasing the output torque of the drive mechanism 27, after the drive shaft 20 runs in reverse and leaves the processing position window, the power supply to the electric release component 30 can be released, so that the pin end of the spring positioning pin 29 abuts against the holeless end face of the positioning disk 28 under the action of the return spring; the positioning hole shear, pin end contact stress, disk hub connection strength and the pin retraction force of the electric release component 30 are all checked according to the maximum holding torque.

[0057] Furthermore, the drive shaft 20, drive mechanism 27, and retaining assembly consisting of positioning disc 28, spring positioning pin 29, and electric release component 30 are all arranged in the maintenance area above the maximum normal water level. The relevant electrical components adopt a sealed protection structure adapted to the installation environment. A torque limiting coupling or current limiting protection is provided between the drive mechanism 27 and the cylindrical cam 21 to limit the continued forced squeezing of the inlet seal 7 or outlet seal 9 when debris is stuck. The torque limiting value should be higher than the normal opening and closing torque under the maximum working head, and lower than the damage torque of the valve stem, cylindrical cam 21, and related transmission components.

[0058] Furthermore, in this embodiment, the drive mechanism 27 adopts a worm gear reducer motor with static self-locking capability. During selection, its holding capacity is checked according to the maximum possible reverse-drive load; it cannot be assumed that self-locking is inevitable simply because a geared motor is used. The output torque of the drive mechanism 27 should cover the combined resistance formed by the loading of the two preloaded springs 26, the hydraulic pressure on the sealing component, the friction of the cam guide groove, and the friction of the hinged transmission. When current limit protection is used, the overcurrent time threshold should be able to distinguish between normal starting impact and continuous jamming. After torque-limiting slippage occurs, the actual position of the drive shaft 20 obtained by the isolation section position detection device 42 should be used for verification, and the cumulative motor revolutions should not replace the actual position detection.

[0059] As a preferred embodiment of the present invention like Figure 1 , Figure 4 and Figure 9 As shown, an adjustable flow element 16 is provided downstream of the treatment outlet 8. The adjustable flow element 16 is used to limit the treatment flow rate entering the purification component from the interception chamber 5. The outlet end of the adjustable flow element 16 is connected to the particle filter unit 13. The downstream of the particle filter unit 13 is connected to the adsorption unit 14. The particle filter unit 13 and the adsorption unit 14 together constitute a series purification component. The outlet side of the adsorption unit 14 is connected to a purification drainage channel 15. The purification drainage channel 15 extends along the bottom of the well body 1 towards the drainage outlet 12 and connects with the drainage outlet 12. A sampling port 38 and a check valve 37 are provided on the purification drainage channel 15. Along the drainage direction of the purified water, the sampling port 38 is located on the outlet side of the adsorption unit 14 and upstream of the check valve 37. The check valve 37 is located between the sampling port 38 and the drainage outlet 12. The sampling port 38 is used to obtain water samples after treatment by the particle filtration unit 13 and the adsorption unit 14, and to reduce the influence of residual water or top water on the drainage outlet 12 side on the representativeness of the sampling. The check valve 37 is used to prevent downstream water from flowing back into the adsorption unit 14 and the particle filtration unit 13 through the purification drainage channel 15 when the water level on the drainage outlet 12 side rises and forms an unfavorable pressure difference. The particulate filtration unit 13 uses a combination of washable filter screen and particulate filter media, and the adsorption unit 14 uses granular activated carbon or adsorption materials that have been verified to be suitable by actual water samples. The specific materials, gradation and replacement cycle are determined according to the target pollutants, and it is not assumed that all pollutants can be removed to the standard simply because the adsorption unit 14 is set up.

[0060] Furthermore, such as Figure 4 , Figure 9 As shown, the purification assembly consisting of a particle filtration unit 13 and an adsorption unit 14 is installed in a stacked mounting housing with an upper inlet and a lower outlet. The particle filtration unit 13 is located on the upper layer and the adsorption unit 14 is located on the lower layer. Both are made into detachable filter boxes with extraction parts. A continuous sealing gasket is provided around the periphery of each filter box. An annular mounting seat is provided in the mounting housing at the position corresponding to each filter box. A detachable clamping frame is provided on the top of the mounting housing. The clamping frame presses down on the two-stage filter boxes through fasteners, so that the continuous sealing gasket of each stage of filter box abuts against the corresponding annular mounting seat to form a closed seal. The mounting guide rail is only used for guiding and positioning when the filter box is installed and does not replace the periphery seal. The filter box sidewall does not have a bypass hole connecting the upstream and downstream. Therefore, the water flow that enters the upper cavity of the mounting housing through the adjustable flow element 16 passes through the particle filtration unit 13 and the adsorption unit 14 in sequence and then enters the bottom water collection cavity, and then flows into the purification drainage channel 15.

[0061] Preferably, the bottom of the filter box is provided with a porous support plate, and the upper part of the filter media is provided with an interceptor plate or a pressure screen. The aperture of the support holes and the interceptor screen is smaller than the minimum allowable escape particle size of the selected filter media. If necessary, a transition screen layer is added. When replacing, the operation is stopped and the upstream water is isolated. The intercepted water is treated through maintenance equipment, the pressure frame is disassembled, and the upper and lower filter boxes are removed in sequence. After reassembly, the integrity of the perimeter seal of the two stages and the continuity of the water circuit are checked, and then the operation is resumed. There is no backwashing short circuit for direct discharge rainwater pipe network between the two-stage filter boxes and the channel.

[0062] Furthermore, in this embodiment, gravity drainage is adopted. The elevation of the purification components and the purification drainage channel 15 is arranged according to the lowest effective drainage level of the interception chamber. It should meet the following condition: under the target treatment flow rate, the head difference between the lowest effective drainage level and the downstream control water level is greater than the total head loss of the throttling device, filter box, pipeline and local components. If the site elevation does not meet this condition, this gravity embodiment is not applicable, and the overall burial depth should be adjusted or a different lifting drainage implementation method should be designed.

[0063] When the low-level drainage conditions are represented by the water surface elevation zL corresponding to the reset liquid level and the downstream control water level zD, zL-zD should be greater than the sum of the head losses of the adjustable flow element 16, particle filter unit 13, adsorption unit 14, purification drainage channel 15 and check valve 37 under the verification flow rate, and allowance should be reserved for filter media contamination. If a constant design flow rate cannot be maintained in the low liquid level stage, the downstream treatment flow rate is allowed to decrease as the water head decreases, but the liquid level of the interception chamber 5 should be ensured to drop to hL within the allowable treatment time. The opening pressure difference of the check valve 37 is also included in the total head loss.

[0064] The check valve 37 on the purification drainage channel 15 closes when the water level rises on the side of the drainage outlet 12 and an unfavorable pressure difference is generated, thereby preventing downstream water from flowing back into the adsorption unit 14 and the particle filter unit 13 through the purification drainage channel 15. During the period when the check valve 37 is closed, the interception chamber 5 stops draining and maintains the treatment position until the downstream water level drops and gravity drainage conditions are restored. At this time, it must not be forcibly reset simply because the timer for no water has ended. Sampling port 38 is located between the outlet side of adsorption unit 14 and check valve 37. Its sampling position is upstream of check valve 37 on the purification side, used to obtain water samples after treatment by particle filtration unit 13 and adsorption unit 14. Sampling port 38 remains closed during normal operation, opening only during sampling and resealing after sampling. Check valve 37 is located downstream of sampling port 38, its function limited to reducing the risk of backflow of water from drainage outlet 12 into the purification components; it does not increase the drainage capacity of the mechanism.

[0065] The relationship between the effective retention volume V of the retention chamber and the set liquid level is as follows: V is equal to the integral of the net horizontal water flow area A(h) within the range from the reset liquid level hL to the retention liquid level hH; for a chamber with a constant net horizontal area within this range, V=A×(hH-hL). It should be noted that the volume occupied by mud collection tanks, valves, pipes, etc., should not be counted again in the effective retention volume.

[0066] If the initial liquid level of this cycle is h0 and the liquid level when the valve is seated is h-closed, the actual interception increment is calculated as the integral of A(h) within the range from h0 to h-closed. The V from hL to hH mentioned above is the nominal value. The initial liquid level deviation and closing delay cannot be ignored. When using advanced trigger compensation, the trigger liquid level should be recalibrated based on the measured changes in influent and the execution delay, and the maximum safe influent volume should be reserved.

[0067] During the initial selection of the project, the formula V_target = ψ × F × d was used as the estimation formula for the target interception volume, where ψ is the runoff coefficient determined based on the catchment area, F is the catchment area, and d is the selected interception depth of rainfall in meters. This relationship is a volume design estimation and is not the basis for our organization to directly judge water quality. d should be determined based on the project control targets and on-site rainfall and runoff data.

[0068] As a calculation example, let F = 400m 2 Given ψ=0.85 and d=0.003m, we obtain V_target=1.02m. 3 If the net horizontal area within the effective interception height range is 1.20m² 2 Since hH-hL=0.85m, the effective interception volume is also 1.02m³. 3 The total volume of the cavity should also include the sludge collection space, safety margin, and space above the liquid level.

[0069] Even after the liquid level reaches hH, there is still a detection and closing delay. Let the maximum detection delay be tdetect, the longest time from the start of driving to the inlet valve seat be tclose, and the upper limit of the designed cutoff flow rate be Qcutoff. Then the closing lag inlet flow rate can be estimated as ΔV≤Qcutoff×(tdetect+tclose). The safety volume above hH should cover the water volume and liquid level fluctuations, volume calibration errors, and ensure that the highest allowable working liquid level is lower than the vent pipe opening. When Qcut = 5 L / s, tdetect = 0.2 s, and tclose = 3 s, the calculated delayed inflow value is 16 L. However, other errors are not taken into account, and the total safe volume cannot be directly determined based on this. In the diagram, hH represents the trigger level, which is not equivalent to the final water level without instantaneous overshoot.

[0070] For example, the desired size is 1.02m. 3 The intercepted water will complete the main drainage within approximately 2 hours, requiring an average flow rate of about 0.142 L / s. If a 0.5m... 2 With the effective filter media area initially configured, the corresponding average apparent filtration rate is approximately 1.02 m / h. This calculation only illustrates the quantitative relationship between flow rate and area; the actual drainage time is also affected by the decrease in head as the liquid level drops, filter media contamination, and downstream water level, and must be determined through hydraulic testing.

[0071] Furthermore, to minimize the impact of short-term water surface fluctuations and bottom sediment disturbances on the liquid level detection within the interception chamber 5, a stilling water cylinder 31 is installed on the side wall of the interception chamber 5. The lowest connection point of the stilling water cylinder 31 is below the reset liquid level hL and above the allowable top of sediment, ensuring liquid communication between the stilling water cylinder 31 and the interception chamber 5 while preventing bottom sediment from clogging the connection point. Residual water in the sludge collection tank 17 is not included in the effective volume that can be emptied. The reset liquid level hL should match the elevation of the treatment outlet 8 and the lowest operating water level achievable by gravity drainage, and should not be located in a position inaccessible by gravity drainage.

[0072] like Figure 1 , Figure 4 As shown, the still water cylinder 31 is vertically fixed to the side wall of the interception chamber 5. Its top opening is for ventilation and is higher than the highest working liquid level. The bottom or low side wall is provided with a connecting hole that communicates with the interception chamber 5. The cross-sectional area of ​​the connecting hole is designed to suppress short-term water surface fluctuations and keep up with the actual liquid level of the interception chamber 5. The liquid level response delay caused by the connection is included in the aforementioned detection delay t_detect. Preferably, a liquid level detection element 32 is installed inside the still water tank 31. The liquid level detection element 32 is a continuous liquid level probe that extends downward from the top of the still water tank 31. Its measurement range covers the reset liquid level hL, the intercepted liquid level hH and the reserved high water level. Both the connecting hole of the still water tank 31 and the liquid level detection element 32 can be inspected and maintained through the inspection port 40.

[0073] As a preferred embodiment of the present invention like Figure 1 , Figure 5 As shown, to determine whether there is subsequent water flow upstream even after the intercepting inlet 6 is closed, a water inflow detection element 33 is installed at the flow measurement channel upstream of both the intercepting inlet 6 and the bypass overflow outlet 10. The water inflow detection element 33 is signal-connected to the controller 34. In this embodiment, the bottom surface of the flow measuring channel slopes continuously toward the water inlet distribution cavity 4, without setting a closed groove that would cause long-term water accumulation. The incoming water detection element 33 adopts a non-contact water level sensor installed on the bracket above the flow measuring channel, with its detection direction facing the water surface of the flow measuring channel. The controller 34 filters the water depth signal collected by the incoming water detection element 33 and sets a low threshold zL, a high threshold zH, and a de-shaking time td, where zH > zL. When the detected water depth is continuously not higher than zL and reaches td, it is determined that there is no incoming water. When it is continuously not lower than zH and reaches td, it is determined that there is incoming water. When the water depth is between the two thresholds, the previous determination state is maintained.

[0074] The controller 34 also receives signals from the liquid level detection device 32, the inlet water shut-off position feedback switch 35, the outlet water shut-off position feedback switch 43, and the isolation section position detection device 42, and stores the position of the drive shaft 20, the liquid level of the interception chamber 5, the closed state of the inlet water seal 7, the closed state of the outlet water seal 9, the water inflow status, the continuous water outflow time T_dry, the current operating status, and the fault mark. The controller 34 outputs control commands to the drive mechanism 27 and the electric release device 30. When there is a valid water inflow, T_dry is reset to zero. When there is no water inflow, T_dry is continuously accumulated. The threshold value for the interval when there is no water inflow can be set to 6 hours as the initial value for field calibration. When the controller 34 is powered on or any key sensor signal is invalid, the water inflow status is set to unknown and T_dry is set to zero. The unknown status must not meet the reset condition. Position deviation, conflicting switch signals, sensor over-range, and communication failure are all treated as faults.

[0075] During threshold calibration, the residual water depth in the flow measuring channel is first measured when there is no runoff and no downstream backflow. Then, a value zL higher than the stable residual reading is set, and zH is determined based on the water depth corresponding to the minimum inflow rate to be identified. The threshold should be greater than the fluctuation range caused by measurement noise. If this condition cannot be met, the flow measuring channel cross-section or sensor range should be adjusted. A 1-second sampling and 5-second debouncing interval can be used as the starting point for debugging. The final value should take into account the allowable interception error. The continuous water depth caused by downstream backflow can lead to a conservative maintenance of the inflow state, but it should not be interpreted as the water being emptied or the reset condition being met.

[0076] In standby collection state, drive shaft 20 is in the 0° collection position. Water inlet seal 7 leaves the valve seat of intercepting water inlet 6, causing intercepting water inlet 6 to open. Water outlet seal 9 presses against the valve seat of treatment outlet 8, causing treatment outlet 8 to close. Water entering from road rainwater inlet 2 passes through the debris basket 3 and water distribution chamber 4 and enters intercepting chamber 5, causing the liquid level to gradually rise. Whenever water inlet detector 33 detects valid water inlet, controller 34 resets the continuous no-water timer T to zero. Short-term rain stoppage does not trigger the closure of intercepting water inlet 6 or mechanism reset, and intercepting chamber 5 continues to retain the collected rainwater.

[0077] When the liquid level detection element 32 detects that the liquid level in the interception chamber 5 has reached the set interception liquid level hH, the controller 34 enters the isolation switching state and controls the drive mechanism 27 to drive the drive shaft 20 to rotate from 0° to 90°. The drive shaft 20 first enters the common closing section from 30° to 60°. After the controller 34 confirms that the water inlet sealing element 7 has closed the interception water inlet 6 according to the water inlet closing position feedback switch 35, it allows the drive shaft 20 to continue rotating to the 90° processing position. Then, the spring positioning pin 29 enters the processing position positioning hole of the positioning plate 28 and locks the drive shaft 20. In the processing position, the water outlet sealing element 9 opens the processing water outlet 8, and the rainwater in the interception chamber 5 is discharged to the drain outlet 12 through the adjustable flow element 16, the particle filter unit 13, the adsorption unit 14 and the purification drainage channel 15 in sequence. The subsequent water in the same period enters the bypass flow channel 11 through the bypass overflow port 10 and is discharged to the drain outlet 12.

[0078] In the holding state, even if the level detection element 32 detects that the level in the interception chamber 5 has dropped to the reset level hL, as long as the incoming water detection element 33 still determines that there is incoming water upstream, or the continuous period of no incoming water T has not reached the set value, the controller 34 will not cause the electric release element 30 to release the spring positioning pin 29 from locking the positioning plate 28; thus, the drive shaft 20 remains in the 90° processing position, the water inlet sealing element 7 continues to close the interception inlet 6, and the controller 34 will not recognize the drop in water level in the interception chamber 5 or its temporary vacancy as a new rainfall event.

[0079] When the continuous period of no water supply Td is greater than or equal to the set interval T, and the liquid level detection element 32 detects that the liquid level h in the interception chamber 5 is less than or equal to the reset liquid level hL, and at the same time the water supply, liquid level, position and lockout feedback are all valid and there is no unresolved fault, the controller 34 performs a reset. During reset, the controller 34 first causes the electric release component 30 to drive the spring positioning pin 29 out of the processing position positioning hole of the positioning plate 28, and after confirming that the pin is in place, controls the drive mechanism 27 to drive in reverse. When the drive shaft 20 rotates in reverse from 90° to 0°, the water outlet sealing component 9 first moves in the direction of closing the processing water outlet 8. When the drive shaft 20 enters the common closing section and reaches the isolation confirmation position near 45°, the controller 34 pauses the drive mechanism 27 and confirms that the water outlet sealing component 9 has actually sat down to close the processing water outlet 8 according to the water outlet closing position feedback switch 43. After obtaining a stable water outlet closing confirmation signal, the controller 34 allows the drive shaft 20 to continue rotating in reverse towards the 0° collection position, and then the water inlet sealing component 7 opens the intercepting water inlet 6. If the water outlet closing position feedback signal is not obtained within the specified confirmation time, the controller 34 stops the drive mechanism 27 and latches the fault, keeping the water inlet sealing component 7 closed and not performing the action of opening the intercepting water inlet 6. After drive shaft 20 reaches the 0° collection position, controller 34 stops drive mechanism 27, records the current liquid level as the starting liquid level for the next cycle, clears the status flag of the previous processing cycle, and returns to standby collection state. The reset liquid level condition should continuously reach the set de-jittering duration to avoid instantaneous fluctuations in liquid level triggering a reset.

[0080] It is important to note that if incoming water is detected again during the reset process, the reverse reset should stop before the inlet is opened, and the system should return to the processing position in the forward sequence. Once the inlet is open, forward isolation and processing should be performed immediately, and the T-dry level should be reset. Short-term additional retention may occur during this process; it cannot be claimed that there will be no additional collection at any given time of incoming water.

[0081] Figure 5 The above represents the main line under normal conditions, while the above is the branch for treating abnormal incoming water.

[0082] For light rain events that do not reach hH, if no water supply has been present for the set duration and the liquid level remains above hL, an incomplete filling process will be performed. The sequence of actions is to first close the intercepting inlet and then open the treated outlet. If no new water supply occurs during the process, the process will reset once the liquid level reaches hL. If water supply resumes during the process, the no-water-supply timer will be reset and the process will remain in place until both conditions are met again before the process can be reset.

[0083] If no incoming water reaches the set point T and the liquid level is no higher than hL, and the mechanism is in the collection position, then standby collection should continue; residual water below hL is not counted as an independent drainable batch. Similarly, if filter media becomes clogged or the downstream water level is high, preventing the liquid level from dropping to hL before full capacity is reached, the low liquid level condition must not be bypassed for resetting.

[0084] When new water arrives during a period when the treatment capacity is not full, the new water enters the bypass path. Therefore, this facility has a boundary that prevents the simultaneous interception of rainwater preceding an event during the treatment period. The probability of this situation occurring can be reduced by reasonably selecting the treatment flux, the no-inflow interval, and the service catchment area. This embodiment does not claim to be able to treat any continuous rainfall without intervals or omissions.

[0085] For high-intensity incoming water, the bypass overflow outlet 10 can handle water exceeding the designed interception capacity of the interception inlet 6. To provide an additional drainage path when the trash basket 3 is blocked or the normal distribution path fails, an emergency overflow channel 36 is also provided in the well body 1, separated from the interception chamber 5. The inlet of the emergency overflow channel 36 is located upstream of the trash basket 3 and is higher than the inlet water level under normal interception conditions. Its downstream end is connected to the drainage outlet 12, so that the abnormally high inlet water level can bypass the trash basket 3 and the water inlet distribution chamber 4 and be discharged to the drainage outlet 12. The emergency overflow channel 36 is not connected to the interception chamber 5, and its designed drainage capacity should be checked in conjunction with the downstream drainage conditions. The bypass water discharged through the bypass channel 11 and the emergency water discharged through the emergency overflow channel 36 are not marked as purified effluent.

[0086] When the flow rate of the particle filtration unit 13 or adsorption unit 14 decreases due to filter media blockage, the liquid level in the interception chamber 5 remains at the treatment position for a correspondingly longer period. The controller 34 may output a maintenance prompt after the treatment time exceeds the preset maximum treatment time, and continue to keep the inlet seal 7 closed and the interception inlet 6 closed. No unpurified bypass venting should be set up or opened to restore the next round of interception. During maintenance, the stagnant water in the interception chamber 5 and the sediment in the sludge collection tank 17 are disposed of through the maintenance sludge discharge interface 18 and the maintenance equipment.

[0087] After the fault mark is latched, the fault clearing should only be performed after the jamming, sensor failure, or sealing defect has been eliminated and the actual valve position has been verified. Maintenance sludge is collected and disposed of through closed interfaces such as maintenance sludge discharge interface 18, and the bypass channel 11 is not used to discharge sediment. For the emergency overflow channel 36 with the inlet located upstream of the trash basket 3, the detection position of the incoming water detection element 33 should be able to cover the upstream incoming water at the water intake position of the emergency overflow channel 36; if the on-site layout cannot cover it, the collection state should not be independently restored during the emergency state based solely on the absence of incoming water signal from the normal flow measuring tank.

[0088] During a power outage, the self-locking reduction gear in the drive mechanism 27, which has been checked for maximum working load, maintains the current position of the drive shaft 20. If the spring positioning pin 29 was already inserted into the processing position positioning hole of the positioning disk 28 before the power outage, the spring positioning pin 29 further provides mechanical retention of the processing position. If the power outage occurs at the 0° collection position, the water outlet 9 remains closed at the processing outlet 8, but the interception chamber 5 may still exchange water with subsequent incoming water after it is full, so batch isolation is not guaranteed. The bypass channel 11 is used to mitigate the continuous rise of the upstream water level. If the power outage occurs at the 90° processing position, the water inlet 7 remains closed at the interception inlet 6, and gravity processing can continue as long as there is still usable head. If the power outage occurs during the conversion process, the two seals maintain their geometric state at the moment of power outage and do not claim automatic return to their original positions. After power is restored, the controller 34 reads the signals from the isolation section position detection device 42, the water inlet closed position feedback switch 35, and the water outlet closed position feedback switch 43, and checks the consistency between the actual angular position of the drive shaft 20 and the actual closed feedback of the two sealing components. The controller restores the corresponding collection state or processing hold state only when the position status is consistent with the feedback of the corresponding sealing component. In other cases, the controller stops the machine and prompts for inspection. The controller does not reset the machine directly based on the unrecorded time during the power outage.

[0089] Routine maintenance includes: removing and cleaning the debris basket 3 through the inspection port 40; inspecting the valve seats at the intercepting inlet 6 and the treatment outlet 8 for foreign objects and the elastic sealing strips of the sealing components; clearing the communication hole between the still water cylinder 31 and the intercepting chamber 5; discharging the sediment in the sludge collection tank 17 through the maintenance sludge discharge interface 18; replacing or cleaning the filter boxes of the particle filter unit 13 and the adsorption unit 14 after disassembling the clamping frame; and testing the operation and feedback of the positioning plate 28, the spring positioning pin 29, the electric release component 30, the inlet water closed position feedback switch 35, the outlet water closed position feedback switch 43, and the isolation section position detection component 42. Verify the inlet water threshold of inlet water detector 33 and the liquid level threshold of liquid level detector 32. Before restarting, keep the sludge discharge valve at sludge discharge interface 18 closed. After re-tightening the two-stage filter boxes and confirming a perimeter seal, the mechanism can return to normal collection mode.

[0090] During initial commissioning, the following checks can be performed sequentially: Verify the flow path isolation relationship between the interception chamber 5, the bypass channel 11, and the emergency overflow channel 36, as well as the peripheral seals of the filter boxes of the particle filtration unit 13 and the adsorption unit 14; control the drive mechanism 27 to run the drive shaft 20 at low speed for 0° to 90° forward stroke and 90° to 0° return stroke, confirming that there is no simultaneous opening interval between the inlet seal 7 and the outlet seal 9; check for valve seat leakage at the interception inlet 6 and the treatment outlet 8 under the maximum design working head; verify the isolation stop position of the isolation section position detection element 42 near 45° during forward and reverse switching, and verify the inlet closing position respectively. The feedback switch 35 confirms the actual seating of the inlet seal 7 and the feedback switch 43 confirms the actual seating of the outlet seal 9; simulating any failure of closing feedback or inconsistency with the drive shaft position, verifying that the controller 34 can stop the drive and prohibit the continued execution of actions that may cause the other seal to open; verifying the insertion of the spring positioning pin 29 at the 90° processing position, the retraction of the pin performed by the electric release component 30, the corresponding feedback, and the shutdown function in case of retraction failure; calibrating the net volume between the reset liquid level hL and the interception liquid level hH by segmented water addition; and checking the operation under conditions such as not full, full, emptying subsequent water, downstream support, and power failure restart. Figure 5 The state transition is shown. Allowable leakage, maximum handling time, and maintenance thresholds are set according to project control objectives, and the corresponding measurement conditions are recorded.

[0091] It should be noted that the above implementation methods provide the correspondence between water channels, mechanical connections, movement sequences, detection feedback, and reset conditions. Structural dimensions, filter media, and operating thresholds can be selected based on the service catchment area, maximum head, and downstream drainage conditions; adjustments should retain the relationships of closing the treatment outlet during the collection phase, bidirectional sequential isolation via the common cam, maintaining the treatment position, and resetting under both no-inflow and low-level conditions.

[0092] The working principle of this invention is: Step 1: When the mechanism is in standby collection mode, the drive shaft 20 is at the 0° collection position, the inlet seal 7 moves away from the valve seat of the intercepting inlet 6, opening the intercepting inlet 6; the outlet seal 9 presses against the valve seat of the treatment outlet 8, closing the treatment outlet 8. Road water enters the well body 1 through the road rainwater inlet 2, passes through the debris basket 3 to intercept larger debris, enters the inlet distribution chamber 4, and then enters the intercepting chamber 5 through the intercepting inlet 6. The liquid level detection element 32 in the still water tank 31 detects the liquid level in the intercepting chamber 5, and the incoming water detection element 33 detects the upstream incoming water status; whenever the incoming water detection element 33 detects valid incoming water, the controller 34 resets the continuous no-inflow time to zero.

[0093] Step two: When the liquid level detection element 32 detects that the liquid level in the interception chamber 5 has reached the set interception liquid level, the controller 34 controls the drive mechanism 27 to drive the drive shaft 20 to rotate from the 0° collection position to the 90° processing position. When the drive shaft 20 rotates in the 0° to 30° range, the inlet sealing element 7 descends and closes the interception inlet 6, while the outlet sealing element 9 continues to close the processing outlet 8; after the drive shaft 20 enters the common closing section from 30° to 60°, both the inlet sealing element 7 and the outlet sealing element 9 are simultaneously in the closed state. When the drive shaft 20 reaches the isolation confirmation position near 45°, the controller 34 pauses the drive mechanism 27, verifies the position of the drive shaft 20 through the isolation section position detection element 42, and confirms that the water inlet sealing element 7 has actually settled and closed the water inlet 6 based on the signal from the water inlet closed position feedback switch 35. Only after obtaining a stable water inlet closed position feedback signal will the controller 34 allow the drive shaft 20 to continue rotating towards the 90° processing position; if the water inlet closed position feedback signal is not obtained within the specified confirmation time, the controller 34 stops the drive mechanism 27 and latches the fault, and does not perform the subsequent action of opening the processing outlet 8.

[0094] Step 3: After obtaining confirmation of inlet closure, drive shaft 20 continues to rotate from the common closure section to the 90° treatment position. Within the 60° to 90° range, inlet seal 7 remains closed, intercepting inlet 6, while outlet seal 9 releases pre-pressure and rises, opening the treated outlet 8.

[0095] After the drive shaft 20 reaches the 90° processing position, the spring positioning pin 29 enters the processing position positioning hole of the positioning disk 28. After the controller 34 confirms the feedback of the pin position, it records the current state as processing lock. At this time, the rainwater in the interception chamber 5 is discharged from the processing outlet 8, passes through the adjustable flow element 16, the particle filter unit 13 and the adsorption unit 14 in sequence, and then enters the purification drainage channel 15. It then passes through the upstream purification side where the sampling port 38 is located and the check valve 37 in sequence, and finally flows to the drainage outlet 12. Among them, the sampling port 38 is located upstream of the check valve 37, and the check valve 37 is located between the sampling port 38 and the drainage outlet 12. During the treatment period, subsequent incoming water cannot enter the interception chamber 5 through the closed interception inlet 6. After the subsequent incoming water meets the bypass conditions, it enters the bypass flow channel 11 through the bypass overflow outlet 10 and is discharged through the drainage outlet 12.

[0096] Step 4: In the processing holding state, even if the liquid level detection element 32 detects that the liquid level in the interception chamber 5 has dropped to the reset liquid level, as long as the incoming water detection element 33 still determines that there is incoming water upstream, or the continuous no-incoming-water time has not reached the set interval, the controller 34 will not release the locking of the spring positioning pin 29 to the positioning plate 28, the drive shaft 20 will continue to be held at the 90° processing position, and the water inlet sealing element 7 will continue to close the interception inlet 6. When the continuous period without water reaches the set interval, the level detection element 32 detects that the level of the interception chamber 5 is not higher than the reset level, and at the same time, the water supply, level, position and lock-up feedback are all valid and there are no unresolved faults, the controller 34 enters the reset process.

[0097] Step 5: At the start of the reset, the controller 34 first energizes the electric release component 30, causing the spring positioning pin 29 to exit the processing position positioning hole of the positioning disk 28. After receiving feedback that the pin has retracted, the controller 34 controls the drive mechanism 27 to reverse. The controller 34 does not allow the drive mechanism 27 to reverse until feedback that the pin has retracted is received. When the drive shaft 20 rotates in the reverse direction from the 90° processing position to the 0° collection position, the water outlet seal 9 first moves in the direction of closing the processing water outlet 8; when the drive shaft 20 enters the common closing section and reaches the isolation confirmation position near 45°, the controller 34 pauses the drive mechanism 27 and confirms through the water outlet closing position feedback switch 43 that the water outlet seal 9 has actually sat down to close the processing water outlet 8. Only after obtaining a stable feedback signal for the water outlet closed position will the controller 34 allow the drive shaft 20 to continue rotating in the reverse direction towards the 0° collection position, and subsequently open the water inlet closure 7 to intercept the water inlet 6. If no feedback signal for the water outlet closed position is obtained within the specified confirmation time, the controller 34 will stop the drive mechanism 27 and lock the fault, keeping the water inlet closure 7 closed and not performing the subsequent action of opening the water inlet 6.

[0098] Step 6: When the drive shaft 20 reaches the 0° collection position, the controller 34 stops the drive mechanism 27, records the current liquid level as the starting liquid level of the next cycle, clears the status mark of the previous processing cycle and returns to the standby collection state, the water inlet seal 7 is put back into the state of opening the intercepting water inlet 6, and the water outlet seal 9 remains closed at the processing water outlet 8.

[0099] Step 7: During the process of resetting the drive shaft 20 from the 90° processing position to the 0° collection position, if the incoming water detection element 33 detects incoming water again and the intercepting inlet 6 has not yet been opened, the reverse reset stops and the drive shaft returns to the processing position in the forward sequence from the collection state to the processing state; if the intercepting inlet 6 has been opened, forward isolation and processing are performed immediately, and the controller 34 resets the continuous no-water time to zero.

[0100] Step 8: When the liquid level in the interception chamber 5 has not reached the set interception level, but no water has been flowing for a set duration and the liquid level is still higher than the reset level, the controller 34 performs an incomplete filling process. The sequence of actions is still to first close the interception inlet 6, and after confirming the water inlet closure and the common closure section, open the treatment outlet 8. If no new water flows in during the treatment period, the system returns to the standby collection state according to the aforementioned reset process after the liquid level in the interception chamber 5 reaches the reset level. If water is detected again during the treatment period, the continuous no-water time is reset and the treatment position is maintained until the reset conditions are met again.

[0101] Step nine: When the incoming water volume exceeds the design interception capacity of the interception inlet 6, the water level in the inlet distribution chamber 4 can rise above the bypass overflow outlet 10, allowing the excess water to be discharged to the drainage outlet 12 via the bypass channel 11. When the debris basket 3 is blocked or the normal distribution path fails, causing an abnormal rise in the inlet water level, the water flow can enter the emergency overflow channel 36 located upstream of the debris basket 3 and be discharged through the drainage outlet 12. The emergency overflow channel 36 is separated from the interception chamber 5. When the water level on the side of the drainage outlet 12 rises and an unfavorable pressure difference is formed, the check valve 37 on the purification drainage channel 15 closes to prevent downstream water from flowing back into the adsorption unit 14 and the particle filter unit 13 through the purification drainage channel 15. During the period when the check valve 37 is closed, the interception chamber 5 stops draining and maintains the treatment position until the downstream water level drops and gravity drainage conditions are restored.

[0102] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A municipal road initial rainwater interception and purification mechanism, characterized in that, The well body (1) includes a road rainwater inlet (2), a water distribution chamber (4), a interception chamber (5), a bypass channel (11), and a drainage outlet (12). The road rainwater inlet (2) is connected to the water distribution chamber (4). The water distribution chamber (4) is connected to the interception chamber (5) through an interception inlet (6) and to the bypass channel (11) through a bypass overflow outlet (10). The bypass channel (11) is connected to the drainage outlet (12). A water inlet seal (7) is provided at the interception inlet (6), and a treatment outlet (8) is provided on the side of the interception cavity (5). A water outlet seal (9) is provided at the treatment outlet (8). A drive mechanism (27) is provided on the upper part of the well body (1). The drive mechanism (27) is connected to the drive shaft (20). A cylindrical cam (21) is fixed on the drive shaft (20). The cylindrical cam (21) forms a first cam guide groove (22) and a second cam guide groove (23). The first cam guide groove (22) and the second cam guide groove (23) are driven by a follower (24) and a transmission rod (25), respectively. When the drive shaft (20) rotates from the collection position to the processing position, the water inlet seal (7) first closes the intercepting water inlet (6), and after passing through the common closing section where the water inlet seal (7) and the water outlet seal (9) are closed simultaneously, the water outlet seal (9) opens the processing water outlet (8). When the drive shaft (20) rotates in the opposite direction from the processing position to the collection position, the water outlet seal (9) first closes the processing water outlet (8), and after passing through the common closing section, the water inlet seal (7) opens the intercepting water inlet (6). A water inlet shut-off position feedback switch (35) is provided at the water inlet closure (7), and a water outlet shut-off position feedback switch (43) is provided at the water outlet closure (9). The controller (34) controls the drive mechanism (27) according to the signals of the water inlet shut-off position feedback switch (35) and the water outlet shut-off position feedback switch (43). Downstream of the treatment outlet (8), an adjustable flow element (16), a particle filter unit (13), and an adsorption unit (14) are arranged in sequence. The water outlet side of the adsorption unit (14) is connected to the purification drainage channel (15), and the purification drainage channel (15) is connected to the drainage outlet (12).

2. The municipal road initial rainwater interception and purification mechanism according to claim 1, characterized in that, Both the inlet closure (7) and the outlet closure (9) include a valve disc that mates with the corresponding valve port and a valve stem connected to the valve disc. A valve seat is provided around the periphery of the corresponding valve port, and an elastic sealing strip is provided around the lower periphery of the valve disc. When the valve disc moves downward, the elastic sealing strip presses against the valve seat to close the corresponding valve port. When the valve disc moves upward, it leaves the valve seat to open the corresponding valve port. Each valve stem extends upward through a guide sleeve fixed to the corresponding valve body cover plate. A sealing ring is provided between the guide sleeve and the valve stem. The valve disc, valve stem, and corresponding transmission rod (25) are arranged coaxially.

3. The municipal road initial rainwater interception and purification mechanism according to claim 2, characterized in that, The valve stem and the transmission rod (25) are connected by a floating preload connection. A spring sleeve is provided at the lower end of each transmission rod (25). The top of the spring sleeve forms an upper spring seat, and the bottom forms an inward return limit part with a valve stem through hole. A load-bearing flange is provided at the upper part of the valve stem. The load-bearing flange is located inside the spring sleeve and can slide vertically relative to the spring sleeve. The upper end of the valve stem is separated from the lower end of the transmission rod (25). The preload spring (26) is sleeved on the outside of the valve stem and sandwiched between the upper spring seat and the load-bearing flange.

4. The municipal road initial rainwater interception and purification mechanism according to claim 3, characterized in that, Each of the driven members (24) has its axle fixed on a corresponding slide. The slide moves along a linear guide parallel to the drive shaft (20). Each slide is sequentially connected to a first hinge link, a steering rocker arm, a second hinge link, and a vertical guide slider. One end of the first hinge link is hinged to the slide, and the other end is hinged to the input arm end of the steering rocker arm. The middle fulcrum of the steering rocker arm is supported on a fixed support by a pin. The output arm end of the steering rocker arm is connected to the vertical guide slider via the second hinge link. The transmission rod (25) is fixed on the vertical guide slider.

5. A municipal road initial rainwater interception and purification mechanism according to claim 4, characterized in that, The collection position of the drive shaft (20) is 0° and the processing position is 90°. When the drive shaft (20) rotates from 0° to 90°, the water inlet seal (7) completes descent, settling and pre-pressurization in the range of 0° to 30°. The water outlet seal (9) keeps the processed water outlet (8) closed. The range of 30° to 60° is the common closing section where the water inlet seal (7) and the water outlet seal (9) are closed at the same time. In the range of 60° to 90°, the water inlet seal (7) keeps closed and the water outlet seal (9) opens the processed water outlet (8). An isolation section position detection device (42) is provided at one end of the drive shaft (20).

6. A municipal road initial rainwater interception and purification mechanism according to claim 5, characterized in that, The trigger of the inlet water shut-off position feedback switch (35) is fixed on the valve stem rigidly connected to the inlet water valve disc, and the trigger of the outlet water shut-off position feedback switch (43) is fixed on the valve stem rigidly connected to the outlet water valve disc; when the drive shaft (20) changes from the collection position to the processing position and reaches the isolation confirmation position within the common shut-off section, the controller (34) allows the drive shaft (20) to continue rotating towards the processing position after obtaining a stable inlet water shut-off position feedback signal; when the drive shaft (20) reverses from the processing position to the collection position and reaches the isolation confirmation position, the controller (34) allows the drive shaft (20) to continue rotating towards the collection position after obtaining a stable outlet water shut-off position feedback signal and then opens the intercepting inlet (6).

7. A municipal road initial rainwater interception and purification mechanism according to claim 6, characterized in that, A positioning disk (28) is provided on the drive shaft (20). A processing position positioning hole is provided on the end face of the positioning disk (28). A spring positioning pin (29) is provided in the stationary guide seat fixed to the well body (1). An electric release component (30) is provided on the side of the spring positioning pin (29) away from the positioning disk (28) and connected to the pin body of the spring positioning pin (29). When the drive shaft (20) reaches the processing position, the spring positioning pin (29) enters the processing position positioning hole to restrict the rotation of the positioning disk (28) and the drive shaft (20). The electric release component (30) is provided with a pin retraction feedback contact. The pin body of the spring positioning pin (29) or the armature connected to it is provided with a pin insertion position feedback.

8. A municipal road initial rainwater interception and purification mechanism according to claim 7, characterized in that, The purification drainage channel (15) is provided with a sampling port (38) and a check valve (37). Along the drainage direction of the purified water, the sampling port (38) is located on the water outlet side of the adsorption unit (14) and upstream of the check valve (37). The check valve (37) is located between the sampling port (38) and the drainage outlet (12). The particle filtration unit (13) and the adsorption unit (14) are installed in a stacked housing with top inlet and bottom outlet. The particle filtration unit (13) is located on the upper layer and the adsorption unit (14) is located on the lower layer. Both the particle filtration unit (13) and the adsorption unit (14) are made into detachable filter boxes with extraction parts.

9. A municipal road initial rainwater interception and purification mechanism according to claim 8, characterized in that, A stilling water cylinder (31) is provided on the side wall of the interception chamber (5). The stilling water cylinder (31) and the interception chamber (5) are kept in liquid communication. A liquid level detection device (32) is provided inside the stilling water cylinder (31). A flow measuring channel is provided upstream of the interception inlet (6) and the bypass overflow outlet (10). A water inlet detection device (33) is provided at the flow measuring channel. The water inlet detection device (33) is signal connected to the controller (34). The controller (34) receives signals from the liquid level detection device (32), the water inlet detection device (33), the water inlet closed position feedback switch (35), the water outlet closed position feedback switch (43), and the isolation section position detection device (42). When the continuous water outage time reaches the set interval, the liquid level of the interception chamber (5) is not higher than the reset liquid level, and the water inlet, liquid level, position, and lock feedback are all effective and there is no unresolved fault, the controller (34) controls the mechanism to reset from the processing position to the collection position.

10. A municipal road initial rainwater interception and purification mechanism according to claim 9, characterized in that, A debris basket (3) is installed below the inner side of the road rainwater inlet (2). A sludge collection trough (17) is installed at the bottom of the interception cavity (5). The sludge collection trough (17) is connected to the maintenance sludge discharge interface (18). A slag baffle (19) is installed upstream of the treatment outlet (8). A vent pipe (41) is installed at the upper part of the interception cavity (5). An emergency overflow channel (36) is also installed in the well body (1) and is separated from the interception cavity (5). The inlet of the emergency overflow channel (36) is located upstream of the debris basket (3) and is higher than the inlet water level under normal interception conditions. The downstream end of the emergency overflow channel (36) is connected to the drainage outlet (12). The emergency overflow channel (36) is not connected to the interception cavity (5).

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