Improved initial rainwater sewage interception device based on double-cyclone separation technology

Abstract

The invention discloses an improved initial rainwater sewage interception device based on a double-cyclone separation technology, and relates to the technical field of rainwater treatment and sewage treatment.The improved initial rainwater sewage interception device comprises an outer cylinder and an access cover arranged at the top of the outer cylinder and used for sealing the outer cylinder, and a water inlet pipe and a water outlet pipe are arranged on the outer wall of the outer cylinder; rainwater is discharged through the water inlet pipe, rotational flow is formed, then impurities and viscous substances in the rotational flow rainwater are filtered out through the annular separation assembly, the rainwater is separated through the cyclone separation assembly, and the rainwater is separated through the cyclone separation assembly. According to the device, the annular separation assembly is arranged, so that viscous substances in rainwater are attached to the annular separation assembly, the viscosity of the rainwater is reduced, impurities in the rainwater have a better centrifugal separation effect in rotational flow, and the separated impurities are guided to the position below the separation funnel through the rotational flow; after the water level of the treated rainwater rises in the outer cylinder, the rainwater is filtered through the cyclone separation assembly and then is discharged through the drainage pipe, and the cleanliness of the rainwater is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of rainwater treatment and sewage treatment, and in particular to an improved initial rainwater sewage interception device based on double cyclone separation technology. Background Art

[0002] Rainwater is one of the common water resources. Initial rainwater refers to the runoff formed by the first 12.5 mm of rainfall when rainfall starts to form surface runoff.

[0003] Urban rainwater is generally discharged directly into natural water bodies through pipes. However, since the initial rainwater comes into contact with pollutants in the air and the surface, the concentration of pollutants in the initial rainwater is relatively high. If the initial rainwater directly flows into rivers and other water bodies, it will pollute these water bodies and cause the water quality of natural water bodies to deteriorate. There is an existing device for intercepting pollution from initial rainwater, which uses double cyclone technology to intercept pollution. Specifically, it uses the difference in density between objects and the effect of centrifugal force to separate the water body from the pollutants. After the rainwater enters the inner cavity of the container, a cyclone will be generated, and the generated cyclone will rotate to separate the sediment. The treated water flow is introduced into the central area, and then slowly spirals around the central area in the form of a vortex to be discharged to the outlet. However, due to the high density of pollutants in urban water bodies and the variety of pollutants, as well as the high viscosity of particulate matter, it is difficult for impurities in the generated vortex to collide with the inner wall of the container and lose energy and precipitate, which not only reduces the impurity separation effect, causing this part of rainwater to pollute the water body after discharge, but also some substances with higher viscosity will adhere to the inner wall of the container. After a long time, more and more impurities will be adsorbed, causing new pollution, resulting in poor pollution interception effect of rainwater. Summary of the invention

[0004] The object of the present invention is to provide an improved initial rainwater sewage interception device based on double cyclone separation technology to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: An improved initial rainwater sewage interception device based on double cyclone separation technology comprises an outer cylinder and an inspection cover arranged on the top of the outer cylinder for closing the outer cylinder, a water inlet pipe and a drain pipe are respectively arranged on the outer wall of the outer cylinder, and the water inlet pipe is connected with the inside of the outer cylinder along the tangent direction of the outer cylinder, an annular separation component for separating impurities and viscous substances in rainwater is arranged on the annular inner wall of the outer cylinder, and the water inlet pipe is connected with the inside of the annular separation component, a cyclone separation component and a separation funnel are arranged on the inner wall of the annular separation component from top to bottom, the drain pipe is connected with the inside of the cyclone separation component, and the center of the cyclone separation component is hollow along the axial direction of the outer cylinder and is connected with the inside of the annular separation component; Among them, rainwater forms a vortex by flowing tangentially along the annular separation component, and separates impurities to the bottom of the separation funnel through centrifugal force. After the water level in the annular separation component accumulates to contact the bottom of the cyclone separation component, the rainwater is filtered by the cyclone separation component and discharged through the drain pipe.

[0006] As a preferred solution of the present invention, the annular separation component includes an annular mesh support for filtering impurities and an annular flexible wall for adsorbing viscous substances, the annular flexible wall is arranged on the inner wall of the outer cylinder, the annular mesh support is arranged on the inner side wall of the annular flexible wall, the distance between the annular mesh support and the annular flexible wall is greater than zero, and the separation funnel is arranged on the inner bottom of the annular mesh support.

[0007] As a preferred solution of the present invention, a plurality of strip-shaped elastic thorn strips are arranged on the surface of the annular flexible wall.

[0008] As a preferred embodiment of the present invention, the cyclone separation assembly includes an inner cylinder arranged on the inner wall of an annular mesh bracket, an annular connecting plate is arranged on the inner wall of the inner cylinder, and the drain pipe is connected to the interior of the inner cylinder and is located above the annular connecting plate, an annular filter is arranged on the annular connecting plate, and the top of the annular filter is connected to the annular connecting plate, a trumpet-shaped guide plate is arranged at the bottom of the annular filter, and the bottom diameter of the guide plate is larger than its top diameter and larger than the bottom diameter of the separation funnel, a guide pipe is jointly arranged at the center of the guide plate and the annular filter, and the top of the guide pipe extends upward to be connected to the outside of the inner cylinder, and the bottom of the guide pipe is connected to the bottom of the guide plate.

[0009] As a preferred solution of the present invention, the inner cylinder includes an annular cylinder connected to an annular mesh bracket and concentric with the outer cylinder, a plurality of fixed plates and a plurality of movable plates are symmetrically arranged on the top of the annular cylinder, and the plurality of fixed plates are fixedly connected to the top of the annular filter screen, the outer wall of the guide tube is fixedly connected to the plurality of fixed plates, and the plurality of fixed plates and the plurality of movable plates jointly close the top of the annular cylinder.

[0010] As a preferred solution of the present invention, a water distribution pipe is connected to the water inlet pipe, and the size of the water distribution pipe is smaller than that of the water inlet pipe, one end of the water distribution pipe away from the water inlet pipe is connected to the interior of the annular cylinder, and the water outlet direction of the water distribution pipe is the same as the water outlet direction of the water inlet pipe, and is connected to the interior of the annular cylinder along the tangent direction of the annular cylinder.

[0011] As a preferred solution of the present invention, the separation funnel includes an annular partition plate which is trumpet-shaped and connected to the inner wall of the annular mesh bracket, and the side with a larger diameter of the annular partition plate faces the guide plate, a leakage pipe is arranged at the bottom center of the annular partition plate, and the diameter of the leakage pipe is smaller than the maximum diameter of the guide plate, and a plurality of guide plates are spirally arranged on the upper surface of the annular partition plate, and the plurality of guide plates are arranged on the annular partition plate at an angle downward.

[0012] As a preferred solution of the present invention, the water outlet direction of the water inlet pipe is inclined downward along the horizontal direction.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention discharges rainwater through a water inlet pipe and forms a vortex, and then the vortex rainwater passes through an annular separation component to filter impurities and sticky substances, so that the sticky substances in the rainwater adhere to the annular separation component, thereby reducing the viscosity of the rainwater, so that the impurities in the rainwater have a better centrifugal separation effect in the vortex, and the separated impurities are guided to the bottom of the separation funnel through the vortex, and the treated rainwater is filtered through the vortex separation component after the water level inside the outer cylinder rises and then discharged through the drain pipe, thereby ensuring the cleanliness of the rainwater, and the sticky substances after static drying are precipitated to the bottom of the outer cylinder by the impact of the next rainwater, and when cleaning impurities, the center of the vortex separation component can enter the bottom of the separation funnel to clean the impurities at the bottom of the outer cylinder, thereby ensuring the pollution interception effect of rainwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0015] Figure 1 The present invention provides an overall structural schematic diagram of an improved initial rainwater sewage interception device based on double cyclone separation technology.

[0016] Figure 2 The present invention provides a partial structural schematic diagram of an improved initial rainwater interception device based on double cyclone separation technology; Figure 3 The present invention provides a schematic diagram of the internal structure of an improved initial rainwater interception device based on a double cyclone separation technology; Figure 4 The present invention provides a cross-sectional structural schematic diagram of a first-angle view of an improved initial rainwater interception device based on a double cyclone separation technology; Figure 5The present invention provides a cross-sectional structural schematic diagram of a second viewing angle of an improved initial rainwater interception device based on a double cyclone separation technology; Figure 6 The present invention provides Figure 5 An enlarged schematic diagram of the structure of part A is shown in FIG.

[0017] The numbers in the figure represent the following: 1. Outer cylinder; 2. Water inlet pipe; 3. Drain pipe; 4. Annular separation assembly; 5. Cyclone separation assembly; 6. Separation funnel; 7. Water distribution pipe; 8. Inspection cover; 401, annular mesh support; 402, annular flexible wall; 501, inner tube; 502, annular filter; 503, guide plate; 504, guide pipe; 505, annular connecting plate; 506, annular cylinder; 507, fixed plate; 508, movable plate; 601, annular partition plate; 602, leakage pipe; 603, guide plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0020] like Figures 1 to 6 As shown, the present invention provides an improved initial rainwater sewage interception device based on double cyclone separation technology, comprising an outer cylinder 1 and an inspection cover 8 arranged on the top of the outer cylinder 1 for closing the outer cylinder 1, an inlet pipe 2 and a drain pipe 3 are respectively arranged on the outer wall of the outer cylinder 1, and the inlet pipe 2 is connected with the interior of the outer cylinder 1 along the tangent direction of the outer cylinder 1, an annular separation component 4 for separating impurities and viscous substances in rainwater is arranged on the annular inner wall of the outer cylinder 1, and the inlet pipe 2 is connected with the interior of the annular separation component 4, a cyclone separation component 5 and a separation funnel 6 are arranged on the inner wall of the annular separation component 4 from top to bottom, the drain pipe 3 is connected with the interior of the cyclone separation component 5, and the center of the cyclone separation component 5 is hollow along the axial direction of the outer cylinder 1 and is connected with the interior of the annular separation component 4.

[0021] Among them, rainwater forms a vortex by flowing tangentially along the annular separation component 4, and separates impurities to the bottom of the separation funnel 6 by centrifugal force. After the water level in the annular separation component 4 accumulates to contact the bottom of the cyclone separation component 5, the rainwater is filtered by the cyclone separation component 5 and discharged through the drain pipe 3.

[0022] In actual application of the present application, the inspection cover 8 closes the top of the outer cylinder 1, which is used to open the inner situation of the outer cylinder 1 for inspection. The rainwater enters the annular separation component 4 along the tangent direction of the outer cylinder 1 through the water inlet pipe 2 and forms a vortex. The vortex rainwater filters impurities through the annular separation component 4, and attaches the viscous substances in the rainwater to the annular separation component 4, thereby reducing the viscosity of the impurities in the vortex. Then the rainwater continues to move on the inner side of the annular separation component 4 in a vortex state, and the remaining impurities in the rainwater are separated by the centrifugal force generated during the vortex. The impurities sink to the bottom of the separation funnel 6 under the guidance of the vortex, and the impurities are restricted from floating by the separation funnel 6, thereby ensuring the separation effect of the rainwater. After the rainwater accumulates to a certain height inside the outer cylinder 1, the rainwater forming the vortex is filtered again by the vortex separation component 5 and discharged through the drain pipe 3. In the present device, the vortex moving toward the separation funnel 6, the vortex moving toward the vortex separation component 5, and the annular separation component 4 respectively make the discharged rainwater cleanliness higher and the rainwater pollution interception effect better.

[0023] After no rainwater is discharged, the sticky substance attached to the annular separation component 4 is dehydrated and dried. After the next rainwater is discharged, the rainwater impacts the dried sticky substance, causing the dried substance to fall into the outer cylinder 1 and settle under the separation funnel 6, thereby avoiding the problem of sticky substances polluting subsequent rainwater. The impurities below the separation funnel 6 can be processed through the hollow area at the center of the cyclone separation component 5, thereby ensuring the effect of intercepting pollution from rainwater.

[0024] In this embodiment, the inspection cover 8 can be fixed to the top of the outer cylinder 1 by means of a lock or fixing bolts.

[0025] Furthermore, a pipe may be provided on the side of the outer cylinder 1 for the discharge of impurities when no rainwater enters, and the pipe is connected to a position on the outer cylinder 1 below the separation funnel 6 .

[0026] The annular separation component 4 includes an annular mesh support 401 for filtering impurities and an annular flexible wall 402 for adsorbing viscous substances. The annular flexible wall 402 is arranged on the outer wall of the annular mesh support 401, the annular mesh support 401 is connected to the outer cylinder 1, and the separation funnel 6 is arranged at the inner bottom of the annular mesh support 401.

[0027] In the annular separation component 4, the annular mesh support 401 is connected to the outer cylinder 1 to ensure its own stability, and provide stability support for the annular flexible wall 402 and filter impurities with larger particles. The annular flexible wall 402 is used to absorb viscous substances in rainwater, thereby reducing the viscosity of impurities in rainwater, intercepting impurities in rainwater, and realizing rainwater treatment. The vortex formed by rainwater continues to flow around the outer wall of the annular flexible wall 402, and then the centrifugal force generated by the vortex is used to separate the remaining other impurities. The separated impurities are precipitated to the bottom of the separation funnel 6 and wait for unified treatment after rainy weather (for example, open the inspection cover 8 and suck the impurities under the separation funnel 6 through the hollow area of ​​the cyclone separation component 5), further reducing the degree of rainwater pollution and ensuring the cleanliness of rainwater.

[0028] After the rainy weather is over, the sticky substance attached to the annular flexible wall 402 gradually dries, and after being impacted by the next rain, it falls off the annular flexible wall 402 and sinks to the bottom of the separation funnel 6. Then, it enters the bottom of the separation funnel 6 through the center of the cyclone separation component 5 to extract impurities for treatment, thereby ensuring the cleanliness of rainwater treatment.

[0029] In this embodiment, the annular flexible wall 402 is an annular plate made of porous material.

[0030] The surface of the annular flexible wall 402 is provided with a plurality of strip-shaped elastic thorn strips.

[0031] The sticky substances in the rainwater are adsorbed and retained by the extended elastic barbs, thereby improving the pollution interception effect of the rainwater. The elastic barbs are distributed on the inner wall of the annular flexible wall 402 and are in the shape of slender strips (not shown in the drawings). They can not only intercept the sticky substances, but also undergo elastic deformation and bend downward after being impacted by rainwater, so that the sticky substances that are dried after adhesion can fall normally to the bottom of the separation funnel 6 for aggregation. Finally, the inspection cover 8 is opened to remove the impurities precipitated in the central area of ​​the cyclone separation component 5.

[0032] The cyclone separation component 5 includes an inner cylinder 501 arranged on the inner wall of the annular mesh support 401, an annular connecting plate 505 is arranged on the inner wall of the inner cylinder 501, and the drain pipe 3 is connected to the interior of the inner cylinder 501 and is located above the annular connecting plate 505, an annular filter 502 is arranged on the annular connecting plate 505, and the top of the annular filter 502 is connected to the annular connecting plate 505, and a trumpet-shaped guide plate 503 is arranged at the bottom of the annular filter 502, and the bottom diameter of the guide plate 503 is larger than its top diameter and larger than the bottom diameter of the separation funnel 6, and a guide pipe 504 is jointly arranged at the center of the guide plate 503 and the annular filter 502, and the top of the guide pipe 504 extends upward to communicate with the outside of the inner cylinder 501, and the bottom of the guide pipe 504 is connected to the bottom of the guide plate 503.

[0033] After the water level of rainwater in the outer tube 1 accumulates to a certain height and contacts the guide plate 503, the vortex formed by the rainwater passes through the upper surface of the guide plate 503 and spirally rises around the axis of the guide plate 503 and the guide pipe 504, and then enters the interior of the annular filter 502 after being filtered by the annular filter 502. As the water level continues to rise, the rainwater that has been treated multiple times is discharged through the drain pipe 3.

[0034] The rising space between the annular filter screen 502 and the inner tube 501 is closed by the annular connecting plate 505, thereby limiting the flow of rainwater between the annular filter screen 502 and the inner tube 501 to the drain pipe 3, thereby ensuring the sewage interception and treatment effect of rainwater.

[0035] The setting of the guide pipe 504, firstly, enables the vortex to flow in the guide pipe 504 in a spiral manner, and secondly, provides a channel leading to the bottom of the guide plate 503. After opening the inspection cover 8, the guide pipe 504 can be used to enter the bottom of the separation funnel 6 to suck the precipitated impurities to the outside for treatment, thereby avoiding excessive accumulation of impurities inside the outer cylinder 1 and affecting the pollution interception effect of rainwater.

[0036] In order to ensure that the impurities after cyclone separation can enter the bottom of the separation funnel 6, there is a certain distance between the separation funnel 6 and the guide plate 503 to ensure the passage of rainwater.

[0037] The inner cylinder 501 includes an annular cylinder 506 connected to the annular mesh support 401 and concentric with the outer cylinder 1. A plurality of fixed plates 507 and a plurality of movable plates 508 are symmetrically arranged on the top of the annular cylinder 506. The plurality of fixed plates 507 are fixedly connected to the top of the annular filter 502. The outer wall of the guide tube 504 is fixedly connected to the plurality of fixed plates 507. The plurality of fixed plates 507 and the plurality of movable plates 508 jointly seal the top of the annular cylinder 506. There is a space between the annular cylinder 506 and the annular mesh support 401 so that the vortex generated by rainwater can flow normally, so that the viscous substance adheres to the annular flexible wall 402, and the impurities are separated by the centrifugal force generated by the vortex, thereby ensuring the cleanliness of rainwater pollution interception.

[0038] The guide tube 504 and the annular cylinder 506 can be stably connected by a plurality of fixed plates 507 , and the situation inside the annular cylinder 506 can be easily checked by providing a movable plate 508 , thereby facilitating maintenance.

[0039] The fixed plate 507 and the movable plate 508 jointly seal the annular cylinder 506 to prevent the treated rainwater from overflowing into the outer cylinder 1. In the present embodiment, the movable plate 508 can be fixed to the top of the annular cylinder 506 by fixing bolts, etc., so that the movable plate 508 can be disassembled for easy maintenance, and the movable plate 508 and the fixed plate 507 do not seal the top of the guide tube 504. The movable plate 508 abuts against the outer wall of the guide tube 504 and the fixed plate 507 and has sealing properties to limit the rainwater from overflowing from the annular cylinder 506.

[0040] A water distribution pipe 7 is connected to the water inlet pipe 2, and the size of the water distribution pipe 7 is smaller than that of the water inlet pipe 2. The end of the water distribution pipe 7 away from the water inlet pipe 2 is connected to the interior of the annular cylinder 506, and the water outlet direction of the water distribution pipe 7 is the same as the water outlet direction of the water inlet pipe 2, and is connected to the interior of the annular cylinder 506 along the tangent direction of the annular cylinder 506.

[0041] A portion of rainwater is diverted through the water diversion pipe 7 into the annular cylinder 506, and the impurities remaining on the surface of the guide plate 503 are cleaned by the impact of rainwater, so as to avoid impurities remaining on the surface of the guide plate 503 for a long time and polluting the treated rainwater.

[0042] The rainwater flowing out of the water distribution pipe 7 enters along the tangential direction of the annular cylinder 506 to form a vortex, and is the same as the water inlet direction of the water inlet pipe 2, so that the vortex direction formed by the rainwater flowing out of the water distribution pipe 7 is the same as the vortex direction formed by the rainwater flowing out of the water inlet pipe 2, avoiding the two vortices from colliding with each other. Furthermore, the direction in which the rainwater flows out of the water distribution pipe 7 can be different from the direction in which the rainwater flows out of the water inlet pipe 2, and it is only necessary to ensure that the directions of the formed vortices are the same.

[0043] The separation funnel 6 includes an annular partition plate 601 which is trumpet-shaped and connected to the inner wall of the annular mesh bracket 401, and the side with a larger diameter of the annular partition plate 601 faces the guide plate 503. A leakage pipe 602 is arranged at the bottom center of the annular partition plate 601, and the diameter of the leakage pipe 602 is smaller than the maximum diameter of the guide plate 503. A plurality of guide plates 603 are spirally arranged on the upper surface of the annular partition plate 601, and the plurality of guide plates 603 are arranged on the annular partition plate 601 at an angle downward.

[0044] The funnel formed by the annular partition plate 601 and the leakage pipe 602 allows the separated impurities to sink to the bottom of the separation funnel 6, thereby preventing the separated impurities from flowing back to the top of the separation funnel 6.

[0045] The guide piece 603 can guide the swirl flow downward, thereby improving the effect of impurity separation.

[0046] By setting the bottom size of the guide plate 503 to be larger than the leakage pipe 602 , the swirl flow can spirally rise around the guide plate 503 .

[0047] The water outlet direction of the water inlet pipe 2 is inclined downward along the horizontal direction.

[0048] The rainwater enters the outer tube 1 obliquely downward, has an initial velocity in the vertical direction, and has greater kinetic energy.

[0049] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention. This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. An improved initial rainwater interception device based on double cyclone separation technology, comprising an outer cylinder (1) and an inspection cover (8) arranged on the top of the outer cylinder (1) for closing the outer cylinder (1), characterized in that: An inlet pipe (2) and a drain pipe (3) are respectively arranged on the outer wall of the outer cylinder (1), and the inlet pipe (2) is connected to the interior of the outer cylinder (1) along the tangent direction of the outer cylinder (1). An annular separation component (4) for separating impurities and viscous substances in rainwater is arranged on the annular inner wall of the outer cylinder (1), and the inlet pipe (2) is connected to the interior of the annular separation component (4). A cyclone separation component (5) and a separation funnel (6) are arranged on the inner wall of the annular separation component (4) in sequence from top to bottom. The drain pipe (3) is connected to the interior of the cyclone separation component (5), and the center of the cyclone separation component (5) is in a hollow state along the axial direction of the outer cylinder (1) and is connected to the interior of the annular separation component (4); The rainwater forms a vortex by flowing tangentially along the annular separation component (4), and separates impurities to the bottom of the separation funnel (6) by centrifugal force. After the water level in the annular separation component (4) accumulates to the point where it contacts the bottom of the cyclone separation component (5), the rainwater is filtered by the cyclone separation component (5) and discharged through the drain pipe (3).

2. According to claim 1, an improved initial rainwater interception device based on double cyclone separation technology is characterized in that: The annular separation component (4) comprises an annular mesh support (401) for filtering impurities and an annular flexible wall (402) for adsorbing viscous substances, wherein the annular flexible wall (402) is arranged on the outer wall of the annular mesh support (401), the annular mesh support (401) is connected to the outer cylinder (1), and the separation funnel (6) is arranged on the inner bottom of the annular mesh support (401).

3. The improved initial rainwater interception device based on double cyclone separation technology according to claim 2 is characterized in that: The surface of the annular flexible wall (402) is provided with a plurality of strip-shaped elastic thorn strips.

4. The improved initial rainwater interception device based on double cyclone separation technology according to claim 2 is characterized in that: The cyclone separation assembly (5) comprises an inner cylinder (501) arranged on the inner wall of an annular mesh support (401), an annular connecting plate (505) being arranged on the inner wall of the inner cylinder (501), and the drain pipe (3) being communicated with the interior of the inner cylinder (501) and being located above the annular connecting plate (505), an annular filter screen (502) being arranged on the annular connecting plate (505), and the top of the annular filter screen (502) being connected to the annular connecting plate (505), and the annular A trumpet-shaped guide plate (503) is provided at the bottom of the filter screen (502), and the bottom diameter of the guide plate (503) is larger than the top diameter thereof, and larger than the bottom diameter of the separation funnel (6). A guide pipe (504) is provided at the center of the guide plate (503) and the annular filter screen (502), and the top of the guide pipe (504) extends upward to communicate with the outside of the inner cylinder (501), and the bottom of the guide pipe (504) is communicated with the bottom of the guide plate (503).

5. The improved initial rainwater interception device based on double cyclone separation technology according to claim 4 is characterized in that: The inner cylinder (501) comprises an annular cylinder (506) connected to the annular mesh support (401) and concentric with the outer cylinder (1); a plurality of fixed plates (507) and a plurality of movable plates (508) are symmetrically arranged on the top of the annular cylinder (506); the plurality of fixed plates (507) are all fixedly connected to the top of the annular filter (502); the outer wall of the flow guide tube (504) is fixedly connected to the plurality of fixed plates (507); the plurality of fixed plates (507) and the plurality of movable plates (508) jointly seal the top of the annular cylinder (506).

6. The improved initial rainwater interception device based on double cyclone separation technology according to claim 5 is characterized in that: The water inlet pipe (2) is connected to a water distribution pipe (7), and the size of the water distribution pipe (7) is smaller than that of the water inlet pipe (2). An end of the water distribution pipe (7) away from the water inlet pipe (2) is connected to the interior of the annular cylinder (506), and the water outlet direction of the water distribution pipe (7) is the same as the water outlet direction of the water inlet pipe (2), and is connected to the interior of the annular cylinder (506) along the tangent direction of the annular cylinder (506).

7. The improved initial rainwater interception device based on double cyclone separation technology according to claim 4 is characterized in that: The separation funnel (6) comprises an annular partition plate (601) which is trumpet-shaped and connected to the inner wall of the annular mesh support (401), and the side of the annular partition plate (601) with a larger diameter faces the guide plate (503). A leakage pipe (602) is arranged at the center of the bottom of the annular partition plate (601), and the diameter of the leakage pipe (602) is smaller than the maximum diameter of the guide plate (503). A plurality of guide plates (603) are spirally arranged on the upper surface of the annular partition plate (601), and the plurality of guide plates (603) are arranged on the annular partition plate (601) in an inclined downward manner.

8. The improved initial rainwater interception device based on double cyclone separation technology according to claim 1 is characterized in that: The water outlet direction of the water inlet pipe (2) is inclined downward along the horizontal direction.

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