Anti-clogging rainwater grate

Abstract

The present invention discloses an anti-clogging rain grate in the technical field of rain grates, comprising an upper drain pan, the upper drain pan being provided with an arc-shaped drainage slot; a water diverter pan, the water diverter pan comprising a dial shaft and spiral blades, the dial shaft being arranged below the upper drain pan, a plurality of spiral blades being arranged on the dial shaft and being rotatable around the axis of the dial shaft, the spiral blades being used to bear the impact of water flow and to cause the water flow passing through the drainage slot to move in a spiral motion. The present invention arranges a water diverter pan with spiral blades below the upper drain pan, so that the spiral blades can rotate under the impact of water flow, and the rotating spiral blades can cause the water flow to flow in a spiral shape and form a vortex, which can generate a downward spiral suction force and a circumferential force on the water flow passing through the drainage slot, thereby increasing the flow velocity of the water flow, preventing impurities in the water flow from clogging the drainage slot, and clearing clogged drainage slots.

Description

Technical Field

[0001] The invention relates to the technical field of rainwater grates, in particular to an anti-clogging rainwater grate. Background Art

[0002] Rainwater grates are typically made of flat steel and twisted square steel, or flat steel and flat steel welded together. Installed at the mouth of a manhole, they serve two purposes: to provide support for pedestrians and to drain and filter rainwater. Existing rainwater grates offer excellent support and drainage capabilities, meeting general requirements. However, they suffer from the following deficiencies in actual use:

[0003] 1. As an important debris filtering facility in the rainwater pipe network, the rainwater grate is responsible for intercepting larger debris in the rainwater. However, when the larger debris mixed in the rainwater flows through the rainwater grate, it is easy to get stuck in the drainage holes of the rainwater grate, causing the drainage holes of the rainwater grate to be blocked, thereby reducing the drainage capacity of the rainwater grate, resulting in the rainwater being unable to be discharged into the municipal drainage pipe network in time, and then causing urban waterlogging and other phenomena.

[0004] 2. The upper and lower ends of the existing rainwater grate are connected. When rainwater rises in the sewer well, the rainwater will directly overflow upward through the drainage holes of the rainwater grate, causing municipal drainage backflow. Summary of the Invention

[0005] In view of this, an object of the present invention is to provide an anti-clogging rainwater grate to solve the technical problem that the existing rainwater grate is easily clogged.

[0006] The technical solution adopted by the present invention is: an anti-clogging rainwater grate, comprising:

[0007] An upper drain pan, wherein the upper drain pan is provided with drainage slots;

[0008] The water diversion plate includes a dial shaft and spiral blades. The dial shaft is arranged below the upper drain pan. A plurality of spiral blades are arranged on the dial shaft and can rotate around the axis of the dial shaft. The spiral blades are used to bear the impact of water flow and make the water flowing through the drainage slot hole move in a spiral motion.

[0009] Preferably, the upper drain pan includes a grate pan and reinforcing ribs, a plurality of annular grate pans are coaxially arranged, the reinforcing ribs are fixedly arranged between two adjacent grate pans, and arc-shaped drainage slots are formed between two adjacent grate pans and the reinforcing ribs.

[0010] Preferably, the grate plate is in a conical shape with a larger upper portion and a smaller lower portion, and chamfers are provided on the inner and outer sides of the top end of the grate plate.

[0011] Preferably, the outermost grate plate is provided with a limiting step for cooperating with the wellhead of the sewer.

[0012] Preferably, the water dial plate also includes a sleeve and a positioning link, the bottom end of the positioning link is fixedly connected to the dial shaft, the top end passes through the upper drain pan upward and is connected to the first locking nut, the sleeve is rotatably mounted on the dial shaft, and the plurality of spiral blades are evenly distributed on the sleeve.

[0013] Preferably, it further comprises a lower drain pan, wherein the lower drain pan is provided with a drain hole, and a connecting rod is provided between the lower drain pan and the upper drain pan.

[0014] Preferably, an upper connecting hole is provided on the upper drain pan, and a lower connecting hole is provided on the lower drain pan. The upper threaded section at the top end of the connecting rod is threadedly connected to the upper connecting hole, and the lower threaded section at the bottom end of the connecting rod passes through the lower connecting hole and is connected to the second locking nut. The connecting rod is provided with a limit platform that forms a stop with the upper surface of the lower drain pan.

[0015] Preferably, it also includes an anti-overflow barrier umbrella arranged below the lower drain pan, the anti-overflow barrier umbrella includes an umbrella pole, an outer support pole, a folding umbrella surface, a connecting rod and an anti-overflow float, the umbrella pole is fixedly arranged below the lower drain pan, a plurality of the outer support poles are evenly distributed around the circumference of the umbrella pole axis, and the top end of the outer support pole is hinged to the lower drain pan, the folding umbrella surface is arranged on the outer support pole, one end of the connecting rod is hinged to the umbrella pole, and the other end is hinged to the outer support pole, and a plurality of the anti-overflow floats are arranged at the bottom of the folding umbrella surface to provide a driving force for the folding umbrella surface to unfold outward.

[0016] Preferably, an axial sliding groove is provided on the umbrella rod, and an involvement slider is slidably connected in the axial sliding groove. One end of the involvement rod is hinged to the involvement slider, and the other end is hinged to the second hinge seat on the outer support rod.

[0017] Preferably, a sealing head is provided at the bottom end of the umbrella pole.

[0018] Beneficial effects of the present invention:

[0019] 1. The present invention is provided with an arc-shaped drainage slot on the upper drain pan, and a rotatable water-dipping disc is provided below the upper drain pan. The water-dipping disc includes a dial shaft and a spiral blade, so that the spiral blade can rotate around the axis of the dial shaft under the impact of the water flow. The rotation of the spiral blade can drive the water flow to flow in a spiral shape and form a vortex. The vortex generates a vertical downward spiral suction force on the water flow passing through the drainage slot, which is used to increase the flow speed of the water flow and prevent impurities in the water flow from clogging the drainage slot. At the same time, the vortex generates a circumferential force on the water flow passing through the drainage slot, so that impurities blocked in the drainage slot flow along the drainage slot to dredge the blocked drainage slot.

[0020] 2. The present invention provides a lower drain pan below the water diverter pan, and the lower drain pan is connected to the upper drain pan via a connecting rod, which can improve the stability of the connection between the water diverter pan and the upper drain pan and is conducive to the formation of vortex.

[0021] 3. The present invention is provided with an anti-overflow barrier umbrella below the lower drain pan. The anti-overflow barrier umbrella includes an umbrella pole, an outer support pole, a folding umbrella surface and an anti-overflow float. When rainwater in the sewer well rises, under the buoyancy of the anti-overflow float, the outer support pole can make the folding umbrella surface change from a folded state to an unfolded state, which is used to prevent the rainwater from continuing to rise and effectively reduce the overflow of rainwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic perspective view of the anti-clogging rainwater grate of the present invention;

[0023] Figure 2 It is an axial half-section view of the anti-clogging rainwater grate of the present invention;

[0024] Figure 3 is a three-dimensional schematic diagram of the upper drain pan;

[0025] Figure 4 This is a top view of the upper drain pan;

[0026] Figure 5 for Figure 4 BB view in;

[0027] Figure 6 This is the main view of the water pan;

[0028] Figure 7 for Figure 6 AA view in;

[0029] Figure 8 It is a three-dimensional schematic diagram of the lower drain pan;

[0030] Figure 9 is a three-dimensional schematic diagram of the connecting rod;

[0031] Figure 10 A three-dimensional diagram of an anti-overflow barrier umbrella;

[0032] Figure 11 Bottom view of the overflow barrier umbrella;

[0033] Figure 12 for Figure 11 Axonometric view of the cross section at CC.

[0034] Description of reference numerals in the figures:

[0035] 100. Upper drain pan;

[0036] 101, grate plate;

[0037] 102. Drainage slots;

[0038] 103. Reinforcement;

[0039] 104. Limiting steps;

[0040] 105, mounting hole;

[0041] 106, locking groove;

[0042] 107, upper connecting hole;

[0043] 200, water pan;

[0044] 201, dial shaft;

[0045] 202, first fixed plate;

[0046] 203, positioning connecting rod;

[0047] 204, shaft sleeve;

[0048] 205, spiral blade;

[0049] 206, first locking nut;

[0050] 300, lower drain pan;

[0051] 301, plate body;

[0052] 302, lower connecting hole;

[0053] 303, drainage hole;

[0054] 400, anti-overflow barrier umbrella;

[0055] 401, second fixed plate;

[0056] 402, umbrella pole;

[0057] 403, axial slide;

[0058] 404, implicate slider;

[0059] 405, plugging head;

[0060] 406, first hinge seat;

[0061] 407, external support rod;

[0062] 408. Folding umbrella;

[0063] 409, second hinge seat;

[0064] 410, tie rod;

[0065] 411, anti-overflow floating block;

[0066] 500, connecting rod;

[0067] 501, rod body;

[0068] 502, limit table;

[0069] 503, upper thread section;

[0070] 504, lower thread section;

[0071] 505. Second locking nut. DETAILED DESCRIPTION

[0072] The following is a further detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, and are not intended to limit the present invention.

[0073] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0074] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0075] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0076] Examples, such as Figures 1-12 As shown, an anti-clogging rainwater grate is used to be installed at the wellhead of a sewer in a municipal drainage network; the rainwater grate comprises:

[0077] An upper drain pan 100 having a plurality of drainage slots 102;

[0078] A water diverter tray 200 is arranged directly below the upper drain pan 100; the water diverter tray 200 includes a dial shaft 201 and multiple spiral blades 205. The dial shaft 201 is arranged directly below the upper drain pan 100 in a direction perpendicular to the upper drain pan 100. The multiple spiral blades 205 are arranged on the dial shaft 201 and can rotate around the axis of the dial shaft 201. The spiral blades 205 are used to bear the impact of the water flow and make the water flowing through the drainage slot 102 move in a spiral motion.

[0079] The present application provides a drainage slot 102 on the upper drain pan 100, and a rotatable water dial plate 200 is provided below the upper drain pan 100. The water dial plate 200 includes a dial shaft 201 and a rotatable spiral blade 205. The spiral blade 205 can rotate around the axis of the dial shaft 201 under the impact of the water flow. The rotation of the spiral blade 205 can drive the water flow to flow in a spiral shape and form a vortex. The vortex can generate a vertical downward spiral suction force on the water flow passing through the drainage slot 102, so as to increase the flow speed of the water flow and prevent impurities in the water flow from clogging the drainage slot 102; at the same time, the vortex also generates a circumferential force on the water flow passing through the drainage slot 102, so that the impurities blocked in the drainage slot 102 flow along the drainage slot 102 to clear the blocked drainage slot 102.

[0080] In a specific embodiment, if Figure 1-Figure 5 As shown, a plurality of arc-shaped drainage slots 102 are regularly arranged on the upper drain pan 100. With this arrangement, when rainwater flowing through the upper drain pan 100 flows downward and strikes the water diverter pan 200, the spiral blades 205 of the water diverter pan 200 rotate and cause the water flow to rotate, forming a vortex. This vortex can cause impurities blocked in the drainage slots 102 to move along the length of the drainage slots 102, thereby achieving automatic dredging of the drainage slots 102.

[0081] Preferably, the upper drain pan 100 includes a grate plate 101 and reinforcing ribs 103. A plurality of annular grate plates 101 are coaxially arranged, and the reinforcing ribs 103 are fixedly disposed between two adjacent grate plates 101. Arc-shaped drainage slots 102 are formed between the two adjacent grate plates 101 and the reinforcing ribs 103, and all the reinforcing ribs 103 form a cross. This arrangement, in which the reinforcing ribs 103 are disposed between two adjacent grate plates 101, not only achieves an annular distribution of the drainage slots 102 from the inside out, but also increases the structural strength of the upper drain pan 100 and facilitates the integral casting of the upper drain pan 100.

[0082] In a specific embodiment, if Figure 2 、 Figure 5As shown, the grate plate 101 is tapered, with a larger top and smaller bottom, and chamfers are provided on both the inner and outer sides of the top of the grate plate 101. By configuring the grate plate 101 in this tapered shape, the drainage slots 102 between two adjacent grate plates 101 are configured with the upper ends opening outward and the lower ends opening inward. When rainwater flows through the upper drain pan 100, it not only facilitates the fall of rainwater and foreign matter from above the upper ends of the drainage slots 102, but also effectively prevents foreign matter from getting stuck at the upper ends of the drainage slots 102. Chamfering the inner and outer sides of the top of the grate plate 101 prevents foreign matter in the rainwater from getting caught on the edges of the upper ends of the drainage slots 102.

[0083] In a specific embodiment, if Figure 5 As shown, the outermost grate plate 101 is provided with a limit step 104 for cooperating with the wellhead of the manhole. In this way, when the rainwater grate is installed and fixed, the limit step 104 on the outer grate plate 101 can cooperate with the stopper of the wellhead of the manhole to quickly complete the installation and positioning of the rainwater grate, thereby improving the installation efficiency of the rainwater grate.

[0084] In a specific embodiment, if Figure 1-Figure 7 As shown, the upper drain pan 100 is provided with a coaxial mounting hole 105 and a locking groove 106. The locking groove 106 is provided on the upper end surface of the upper drain pan 100. The water diverter pan 200 also includes a sleeve 204 and a positioning link 203. The positioning link 203 is coaxially mounted in the mounting hole 105. The bottom end of the positioning link 203 is coaxially fixedly connected to the dial shaft 201, and the top end is threadedly connected to the first locking nut 206 in the locking groove 106. The sleeve 204 is rotatably mounted on the dial shaft 201 via a bearing. A plurality of spiral blades 205 are evenly distributed around the circumference of the sleeve 204. In this arrangement, the water diverter pan 200 is mounted and fixed to the upper drain pan 100 by installing the positioning link 203 fixedly connected to the top end of the dial shaft 201 in the mounting hole of the upper drain pan 100 and threading the first locking nut 206 in the locking groove 106 to the top end of the positioning link 203.

[0085] In a specific embodiment, if Figure 1 、 Figure 5 and Figure 8As shown, the rain grate also includes a lower drain pan 300 disposed below the water diverter pan 200. The lower drain pan 300 includes a pan body 301 and drainage holes 303 evenly distributed around the pan body 301. The drainage holes 303 are located below the spiral blades 205. A connecting rod 500 is provided between the lower drain pan 300 and the upper drain pan 100, which is used to securely connect the upper and lower drain pans 100 and 300. A first fixing plate 202 is fixedly connected to the bottom end of the dial shaft 201 of the water diverter pan 200. The first fixing plate 202 is detachably connected to the middle portion of the lower pan body 301. Thus, the lower drain pan 300 is disposed below the water diverter pan 200, and the upper and lower drain pans 100 and 300 are securely connected via the connecting rod 500. This, in conjunction with the connection between the bottom end of the water diverter pan 200 and the lower drain pan 300, provides support and fixation for the bottom end of the water diverter pan 200.

[0086] Preferably, a plurality of upper connecting holes 107 are evenly distributed on the circumference of the edge of the upper drain pan 100, and a plurality of lower connecting holes 302 are evenly distributed on the circumference of the edge of the lower drain pan 300, and the upper connecting holes 107 and the lower connecting holes 302 are in a one-to-one correspondence; the connecting rod 500 includes a rod body 501, an upper threaded section 503 is provided at the top end of the rod body 501, and a lower threaded section 504 is provided at the bottom end of the rod body 501, the upper threaded section 503 is threadedly connected to the upper connecting hole 107, and the lower threaded section 504 passes through the lower connecting hole 302 and is threadedly connected to the second locking nut 505; the connecting rod 500 is also provided with a limit platform 502 that forms a stop with the upper surface of the lower drain pan 300. In this way, the top end of the connecting rod 500 is threadedly connected to the upper connecting hole 107 of the upper drain pan 100, and the bottom end of the connecting rod 500 is passed through the lower connecting hole 302 of the lower drain pan 300 and connected to the second locking nut. The upper limit platform 502 of the connecting rod 500 cooperates with the stopper of the lower drain pan 300 to achieve quick connection and fixation of the upper drain pan 100 and the lower drain pan 300.

[0087] In a specific embodiment, if Figure 1 、 Figure 5 、 Figure 10 、 Figure 11 and Figure 12As shown, the rain grate includes an anti-overflow barrier umbrella 400 arranged below the lower drain pan 300, and the anti-overflow barrier umbrella 400 includes an umbrella pole 402, an outer support rod 407, a folding umbrella surface 408, a connecting rod 410 and an anti-overflow float 411. The umbrella pole 402 is fixedly arranged below the lower drain pan 300, and the umbrella pole 402 is coaxially arranged with the dial shaft 201; a plurality of outer support rods 407 are evenly distributed around the circumference of the axis of the umbrella pole 402, and the top end of the outer support rod 407 is hinged to the lower drain pan 300, and the folding umbrella surface 408 is arranged on the outer support rod 407, one end of the connecting rod 410 is hinged to the umbrella pole 402, and the other end is hinged to the outer support rod 407; a plurality of anti-overflow floats 411 are arranged at the bottom of the folding umbrella surface 408, for providing a driving force for the folding umbrella surface 408 to expand outward. With such arrangement, when draining water, the folding umbrella cover 408 is in a folded state, and rainwater flows through the upper drain pan 100, the water-diverting pan 200, the lower drain pan 300 and the folding umbrella cover 408 into the sewer well, thereby achieving smooth drainage of rainwater; when the rainwater in the sewer well rises to a certain height, the anti-overflow float 411 at the bottom of the folding umbrella cover 408 is immersed in the rainwater, so that the folding umbrella cover 408 in the folded state is subjected to the buoyancy of the anti-overflow float 411. Under the continuous action of this buoyancy, the folding umbrella cover 408 can slowly change from the folded state to the unfolded state. The folding umbrella cover 408 in the unfolded state can block the water flow below the folding umbrella cover 408, thereby weakening the upwelling of the water flow.

[0088] Preferably, the top end of the umbrella rod 402 is fixedly connected to a second fixing plate 401, which is detachably connected to the lower drain pan 300 via connecting bolts. Multiple axial slots 403 are evenly distributed around the outer circumference of the umbrella rod 402. The axial slots 403 have an inverted T-shaped cross-section, and sliding blocks 404 are slidably connected within each of the axial slots 403. First hinged seats 406 are evenly distributed around the lower surface of the second fixing plate 401. The first hinged seats 406 correspond to the outer support rods 407 in a one-to-one relationship, and the outer support rods 407 are hingedly connected to the first hinged seats 406 at their top ends. This arrangement allows the outer support rod 407 to open and close upward and downward around the first hinge seat 406 on the lower surface of the second fixed plate 401, thereby facilitating the folding and unfolding of the folding umbrella cover 408. A second hinge seat 409 is fixedly connected to the middle portion of the outer support rod 407. One end of the engaging rod 410 is hinged to the engaging slider 404, and the other end is hinged to the second hinge seat 409. This arrangement, by providing an axial slot 403 on the umbrella shaft 402 and slidably connecting the engaging slider 404 to the axial slot 403, allows the end of the engaging rod 410 to change position on the umbrella shaft 402, thereby ensuring smooth retraction and extension of the outer support rod 407 outside the umbrella shaft 402.

[0089] More preferably, the folding umbrella surface 408 includes a plurality of fan-shaped surfaces, and adjacent fan-shaped surfaces are rotatably connected by hinges so that the folding umbrella surface 408 is annular when unfolded, and the fan-shaped surfaces are hard plates. Such an arrangement facilitates the folding umbrella surface 408 to switch between the folded state and the unfolded state.

[0090] More preferably, a plugging head 405 is provided at the bottom end of the umbrella rod 402, which covers the bottom end of the umbrella rod 402 or is threadedly connected to the bottom end of the umbrella rod 402. In this arrangement, the plugging head 405 is connected to the bottom end of the umbrella rod 402 to prevent the involved slider 404 from slipping out of the axial slot 403.

[0091] The working principle of the rainwater grate of this application is as follows:

[0092] When the water flows downward from the drainage slot 102, the water will directly contact the upper spiral surface of the spiral blade 205. The impact force generated by the water flow will drive the spiral blade 205 to rotate around the dial shaft 201. The rotating spiral blade 205 will drive the water flow to rotate together, and the rotation will increase the downward transmission force of the water flow, so that the water flow will form a spiral vortex at the upper end of the water diversion plate 200 and the upper drain plate 100. The vortex can wash away the debris attached to the upper end of the upper drain plate 100 or move it to the upper end of the upper drain plate 100. The water is sucked down into the water-diverting tray 200 and, under the action of the rotational force of the spiral blade 205, is twisted to the lower drain tray 300 and discharged downward through the drain hole 303. The water flow encounters the folding umbrella surface 408. Under the impact of the water flow, the folding umbrella surface 408 drives the outer support rod 407 to fold downward, so that the water flow is discharged downward smoothly. Under the action of the spiral suction, the entire downward discharge process can effectively prevent foreign matter from accumulating at the upper port of the rain grate and accelerate the water flow from the upper end of the rain grate. When the water level at the lower end of the rain grate rises, the liquid surface rises to the anti-overflow float 411. Under the buoyancy of the anti-overflow float 411, the anti-overflow float 411 drives the outer support rod 407 and the folding umbrella surface 408 to expand outward. After the folding umbrella surface 408 is expanded outward to a certain extent, an effective barrier can be formed between the rising water flow at the lower end and the upper port of the rain grate, effectively preventing the rainwater from continuing to rise, thereby effectively preventing the rain grate from overflowing.

[0093] Compared with the prior art, this application has at least the following beneficial technical effects:

[0094] 1. During use, when water flows through the upper end of the rain grate, the water flows downward along the drainage slot 102 to the water-dipping plate 200. The impact of the water flow on the spiral blade 205 generates a spiral force, which in turn drives the entire spiral blade 205 to rotate around the dial shaft 201. The rotation of the spiral blade 205 drives the water flow to rotate and forms a spiral suction force on the upper end of the upper drain pan 100, so that foreign matter entering the upper end surface of the grate pan 101 is rotated away or sucked into the water-dipping plate 200 along the drainage slot 102, and further sent to the lower end of the lower drain pan 300. This process increases the speed of water discharge and avoids blockage at the inlet of the drainage slot 102 at the upper end of the upper drain pan 100, thereby improving the working efficiency of the rain grate.

[0095] 2. During use, when water flows through the overflow barrier umbrella 400, it impacts the upper surface of the foldable umbrella cover 408, causing the entire foldable umbrella cover 408, along with the outer support rods 407, to fold inward along the axial chute 403 under the influence of the connecting rod 410, facilitating the smooth downward discharge of water. When rainwater overflows from the lower end of the lower drain pan 300, the overflow prevention float 411, under the buoyancy of the water, drives the foldable umbrella cover 408 upward, thereby causing the outer support rods 407 to turn upward and outward. After turning outward to a certain extent, the foldable umbrella cover 408 forms an effective barrier between the rising water at the lower end and the upper port of the rain grate, effectively preventing further overflow of water and thus avoiding the adverse consequences of overflow.

[0096] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An anti-clogging rainwater grate, comprising: An upper drain pan (100), wherein the upper drain pan (100) is provided with drainage slots (102); The invention is characterized in that it further comprises a water diverter tray (200), a lower drain tray (300) and an anti-overflow barrier umbrella (400), wherein the water diverter tray (200) comprises a dial shaft (201) and spiral blades (205), wherein the dial shaft (201) is arranged below the upper drain tray (100), and a plurality of spiral blades (205) are arranged on the dial shaft (201) and can rotate around the axis of the dial shaft (201), and the spiral blades (205) are used to bear the impact of water flow and make the water flow flowing through the drainage slot hole (102) move in a spiral motion; The lower drain pan (300) is arranged below the water diversion pan (200), and a drain hole (303) is provided on the lower drain pan (300); The anti-overflow barrier umbrella (400) is arranged below the lower drain pan (300), and the anti-overflow barrier umbrella (400) comprises an umbrella pole (402), an outer support pole (407), a folding umbrella surface (408), a connecting rod (410), and an anti-overflow floating block (411). The umbrella pole (402) is fixedly arranged below the lower drain pan (300), and a plurality of the outer support poles (407) are evenly distributed around the circumference of the umbrella pole (402) axis. The top end of the outer support rod (407) is hinged to the lower drain pan (300); the folding umbrella surface (408) is arranged on the outer support rod (407); one end of the connecting rod (410) is hinged to the umbrella rod (402), and the other end is hinged to the outer support rod (407); a plurality of anti-overflow floating blocks (411) are arranged at the bottom of the folding umbrella surface (408) to provide a driving force for the folding umbrella surface (408) to unfold outward.

2. The anti-clogging rainwater grate according to claim 1, characterized in that: The upper drain pan (100) comprises a grate pan (101) and a reinforcing rib (103), wherein a plurality of annular grate pans (101) are coaxially arranged, and the reinforcing rib (103) is fixedly arranged between two adjacent grate pans (101), and an arc-shaped drainage slot (102) is formed between the two adjacent grate pans (101) and the reinforcing rib (103).

3. The anti-clogging rainwater grate according to claim 2, characterized in that: The grate plate (101) is in a conical shape with a larger top and a smaller bottom, and chamfers are provided on both inner and outer sides of the top of the grate plate (101).

4. The anti-clogging rainwater grate according to claim 3, characterized in that: The outermost grate plate (101) is provided with a limiting step (104) for cooperating with the wellhead of the sewer.

5. The anti-clogging rainwater grate according to claim 1, characterized in that: The water-draining plate (200) further comprises a shaft sleeve (204) and a positioning connecting rod (203), wherein the bottom end of the positioning connecting rod (203) is fixedly connected to the dial shaft (201), and the top end of the positioning connecting rod (203) upwardly penetrates the upper drain pan (100) and is connected to the first locking nut (206), the shaft sleeve (204) is rotatably sleeved on the dial shaft (201), and the plurality of spiral blades (205) are evenly distributed on the shaft sleeve (204) circumferentially.

6. The anti-clogging rainwater grate according to claim 1, characterized in that: A connecting rod (500) is provided between the lower drain pan (300) and the upper drain pan (100).

7. The anti-clogging rainwater grate according to claim 6, characterized in that: The upper drain pan (100) is provided with an upper connecting hole (107), the lower drain pan (300) is provided with a lower connecting hole (302), the upper threaded section (503) at the top end of the connecting rod (500) is threadedly connected to the upper connecting hole (107), the lower threaded section (504) at the bottom end of the connecting rod (500) passes through the lower connecting hole (302) and is connected to the second locking nut (505), and the connecting rod (500) is provided with a limit platform (502) that forms a stopper with the upper surface of the lower drain pan (300).

8. The anti-clogging rainwater grate according to claim 1, characterized in that: An axial sliding groove (403) is provided on the umbrella rod (402), and a connecting slider (404) is slidably connected in the axial sliding groove (403). One end of the connecting rod (410) is hinged to the connecting slider (404), and the other end is hinged to the second hinge seat (409) on the outer support rod (407).

9. The anti-clogging rain grate according to claim 8, characterized in that: A sealing head (405) is provided at the bottom end of the umbrella rod (402).

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