Floor drain with dirt interception function suitable for sponge city

Abstract

The invention discloses a floor drain suitable for a sponge city and having a sewage interception function, relates to the technical field related to urban drainage, and aims to solve the problems that in the prior art, when rainwater is large, sewage is driven to quickly move towards a sewage interception hole, the sewage is tightly attached to the outer wall of an interception structure, and the rainwater is difficult to normally pass through the sewage interception hole. The dirt intercepting assembly comprises an upper fixing disc, a middle fixing disc and an inner fixing pipe; a lower water receiving disc is arranged in the middle of the lower end of the dirt intercepting assembly, an outer sleeve is fixed in the middle of the upper end of the lower water receiving disc, and a middle rod is fixed in the middle of the lower end of the upper fixing disc; an upper fixing ring is integrally connected to the upper end of the outer portion of the outer sleeve, and a pressure spring is installed between the upper fixing ring and the upper fixing disc along the outer portion of the middle rod. Second C-shaped fixing seats are fixed to the outer end, in the shape of the Chinese character'mi ', of the outer portion of the upper fixing ring in the eight extending directions, and action rods are rotationally connected into the second C-shaped fixing seats through shafts.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of urban drainage, in particular to a floor drain with sewage interception function suitable for sponge city. BACKGROUND

[0002] With the accelerated advancement of urbanization in China, the city is expanding, and the population is highly concentrated. As an important part of urban infrastructure, the operation efficiency and stability of the urban drainage system are directly related to the normal operation of the city and the quality of life of residents. Especially in the context of frequent extreme weather, urban waterlogging problems are increasingly prominent. The concept of sponge city has emerged to improve the city's ability to absorb, infiltrate and release rainwater, effectively alleviate urban waterlogging, and at the same time realize the recycling of rainwater resources and the improvement of the ecological environment.

[0003] In the construction of sponge city, the optimization and upgrading of urban drainage system is one of the core links. As a key component at the end of the urban drainage system, the performance of the floor drain directly affects the overall efficiency of the drainage system. In the context of the construction of sponge city, the floor drain not only needs to have basic drainage function, but also needs to bear the important responsibility of intercepting sewage, preventing pipe blockage and protecting the smoothness of the drainage system. For example, the Chinese authorized patent with the announcement number CN 219586864 U (a sponge city seepage structure): including a water inlet cavity and a well cover, the inner wall of the water inlet cavity is provided with a slot, and the well cover is detachably installed in the slot; a sliding groove is formed in the well cover, a plurality of through grooves are formed in the side wall of the well cover close to the water inlet cavity, the through grooves are in communication with the sliding groove, and a filter barrel is detachably connected to one end of the well cover close to the water inlet cavity. A plurality of support blocks are fixedly arranged on the filter barrel, and the plurality of support blocks and the plurality of through grooves are one-to-one correspondingly inserted and matched. The support block can be slidably connected to the inner wall of the sliding groove. The present application has the effect of reducing the possibility of downcomer blockage, thereby reducing the possibility of rainwater accumulation, and further increasing the safety factor of people's life and property.

[0004] Although the above-mentioned prior art has the function of sewage interception structure to reduce the possibility of downcomer blockage, when the rainwater is large, the sewage is quickly moved to the direction of the sewage interception hole. Because the sewage is intercepted, the sewage is tightly attached to the outer wall of the structure where the sewage interception hole is located, the sewage is extruded, and the rainwater is difficult to pass through the sewage interception hole normally, so it is difficult to realize the function of rapid downflow of rainwater when the rainwater is large. SUMMARY

[0005] The purpose of the present application is to provide a floor drain with sewage interception function suitable for sponge city, to solve the problem that when the rainwater is large, the sewage is quickly moved to the direction of the sewage interception hole, the sewage is tightly attached to the outer wall of the interception structure, and the rainwater is difficult to pass through the sewage interception hole normally.

[0006] To achieve the above object, the present invention provides the following technical solution: A floor drain with a dirt interception function suitable for a sponge city, including an annular support platform. A dirt interception component is arranged inside the annular support platform. The dirt interception component includes an upper fixing plate, an intermediate fixing plate and an inner fixing pipe. The inner fixing pipe is located at the lower end of the outer part of the upper fixing plate. The upper fixing plate is located at the upper end of the intermediate fixing plate. The intermediate fixing plate is located at the lower end inside the inner fixing pipe. In the middle of the lower end of the dirt interception component, there is a lower water receiving tray. In the middle of the upper end of the lower water receiving tray, there is an outer sleeve fixed. The outer sleeve extends upward through the intermediate fixing plate. The outer sleeve is limited and slides along the intermediate fixing plate. In the middle of the lower end of the upper fixing plate, there is an intermediate rod fixed. The lower end of the intermediate rod extends into the outer sleeve and has a limiting sliding relationship with the outer sleeve. At the upper end of the outer sleeve, there is an upper fixing ring integrally connected. A compression spring is installed between the upper fixing ring and the upper fixing plate along the outside of the intermediate rod. At the outer ends of the "cross" extending in eight directions of the upper fixing ring, there are eight second C-shaped fixing seats fixed. Inside the second C-shaped fixing seats, there are action rods rotatably connected through shafts. The action rods extend outward through the inner fixing pipe.

[0007] Preferably, the lower end inside the annular support platform is set as a lower support step edge. Along the upper end of the lower support step edge inside the annular support platform, there is an upper support platform. The inner surface of the upper support platform is set as an inner inclined annular surface. At the lower end of the outer part of the upper fixing plate, there is an upper frustum-shaped fixing pipe integrally connected. The inner fixing pipe is integrally connected to the lower end of the upper frustum-shaped fixing pipe. The upper frustum-shaped fixing pipe is located in the internal space of the upper support platform.

[0008] Preferably, at the inner side of the lower end of the upper support platform, there is an outer fixing pipe integrally connected. Between the outer fixing pipe and the inner fixing pipe, there is a lower annular bottom seal integrally connected at the lower end. Along the inner periphery of the lower annular bottom seal, there is a lower frustum-shaped fixing pipe integrally connected to the lower end of the inner fixing pipe. The lower frustum-shaped fixing pipe is integrally connected to the lower end of the outer part of the intermediate fixing plate.

[0009] Preferably, a plurality of first interception grooves are annularly penetrated through the pipe wall of the inner fixing pipe. A plurality of second interception grooves are annularly penetrated through the pipe wall of the upper frustum-shaped fixing pipe. A plurality of first fine interception holes are penetrated through the pipe wall of the lower frustum-shaped fixing pipe. A plurality of second fine interception holes are penetrated through the upper end surface of the intermediate fixing plate.

[0010] Preferably, at the lower end inside each of the first interception grooves at the outer ends of the "cross" extending in eight directions, there is a transverse fixing rod fixed. The action rods extend outward through the first interception grooves at the outer ends of the "cross" extending in eight directions. Limited sliding grooves are penetrated through the action rods. The transverse fixing rods and the limited sliding grooves have a limiting sliding relationship.

[0011] Preferably, each of the action rod outer end is provided with a separation groove from top to bottom and is formed into two triangular strips by the separation of the separation groove, and the upper end length of the triangular strip is smaller than the lower end length of the triangular strip.

[0012] Preferably, the lower water receiving tray is composed of a water receiving main body and a plurality of flow guides, the plurality of flow guides are arranged in an annular array outside the water receiving main body, and a force receiving cavity is formed in the water receiving main body.

[0013] Preferably, a rectangular slot is formed in the outer periphery of the upper end face of the water receiving main body between two adjacent flow guides, a first C-shaped fixing seat is fixed to the upper end of the rectangular slot along the lower annular bottom, a rotating member is rotatably connected to the first C-shaped fixing seat and the rectangular slot by a shaft, and a spring rod is fixed between two corresponding rotating members.

[0014] Preferably, the space formed between the upper support table, the outer fixed tube, the lower annular bottom, the inner fixed tube and the upper circular truncated cone fixed tube is an outer dirt cavity, and the space formed between the inner fixed tube, the upper circular truncated cone fixed tube, the lower circular truncated cone fixed tube and the intermediate fixed disc is an inner dirt cavity.

[0015] Preferably, the upper end of the inner part of the annular support table is provided with an upper support step, an upper intercepting cover is arranged along the upper end of the upper support step, pull grooves are formed in the two sides of the upper end face of the upper intercepting cover, a preliminary intercepting grid is arranged at the peripheral position of the upper intercepting cover, and a plurality of preliminary intercepting grooves are formed in the preliminary intercepting grid.

[0016] Compared with the prior art, the present application has the following beneficial effects: (1) In the present application, a pressure spring, an outer sleeve and an action rod are arranged to form a self-adjusting system; when the rain is heavy and the rainwater flow is fast, the pressure of the rainwater on the lower water receiving tray increases and exceeds the force of the pressure spring, the outer sleeve and the lower water receiving tray move downward, the action rod is driven to rotate outward, the triangular strips expand the gap between the dirt, and the rainwater can smoothly pass through, avoiding the dirt from blocking the intercepting groove; when the rain is slow, the pressure spring drives the action rod to rotate inward and reset, and the dirt moves to the lower end of the outer dirt cavity due to its own gravity, without blocking the intercepting groove. This self-adjusting system enables the floor drain to automatically adjust according to the change of the rain, and always maintains good drainage performance, solving the problem that when the rain is heavy, the dirt is quickly moved to the dirt intercepting hole direction, the dirt is tightly attached to the outer wall of the intercepting structure, and the rainwater is difficult to normally pass through the dirt intercepting hole.

[0017] (2) In the present application, multi-stage interception structure is adopted, from preliminary interception to fine interception, different sizes of dirt can be effectively intercepted. The preliminary interception grid and the preliminary interception groove can intercept larger size dirt, avoid entering the floor drain inside; the inner fixed pipe, the upper circular truncated cone fixed pipe, the lower circular truncated cone fixed pipe and the interception groove and the fine interception hole on the middle fixed disc can further intercept small size dirt, reduce the amount of dirt entering the drainage pipe, effectively prevent the drainage pipe from being blocked, and ensure the normal operation of the drainage system. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic diagram of a front view of a floor drain with dirt interception function suitable for a sponge city according to the present application; Figure 2 It is a whole structure schematic diagram of a bottom view of a floor drain with dirt interception function suitable for a sponge city according to the present application; Figure 3 It is a front view of a floor drain with dirt interception function suitable for a sponge city according to the present application; Figure 4 It is a sectional view of A-A of a floor drain with dirt interception function suitable for a sponge city according to the present application; Figure 5 It is an enlarged view of B structure of a floor drain with dirt interception function suitable for a sponge city according to the present application; Figure 6 It is a structure schematic diagram of an annular support table of a floor drain with dirt interception function suitable for a sponge city according to the present application; Figure 7 It is a structure schematic diagram of an upper interception cover of a floor drain with dirt interception function suitable for a sponge city according to the present application; Figure 8 It is a structure schematic diagram of a dirt interception assembly of a floor drain with dirt interception function suitable for a sponge city according to the present application.

[0019] In the figure: 1, annular support platform; 2, upper support ladder; 3, lower support ladder; 4, upper interception cover; 5, pull groove; 6, preliminary interception grid; 7, preliminary interception groove; 8, dirt interception assembly; 9, upper support platform; 10, inner inclined annular surface; 11, outer fixed tube; 12, lower annular bottom; 13, inner fixed tube; 14, upper circular truncated cone fixed tube; 15, upper fixed disc; 16, lower circular truncated cone fixed tube; 17, middle fixed disc; 18, first interception groove; 19, second interception groove; 20, first fine interception hole; 21, second fine interception hole; 22, outer dirt cavity; 23, inner dirt cavity; 24, lower water receiving tray; 25, water receiving body; 26, flow guide; 27, stress cavity; 28, rectangular slot; 29, rotating part; 30, first C-shaped fixed seat; 31, spring rod; 32, outer sleeve; 33, upper fixed ring; 34, middle rod; 35, pressure spring; 36, second C-shaped fixed seat; 37, action rod; 38, transverse fixed rod; 39, limiting sliding groove; 40, separation groove; 41, triangular strip. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0021] Please refer to Figures 1-8 An embodiment provided by the present application: a floor drain with dirt interception function suitable for a sponge city, mainly composed of an annular support platform 1, an upper interception cover 4, a dirt interception assembly 8 and the like.

[0022] The annular support platform 1 is the basic support structure of the entire floor drain, the inner upper end of which is provided with an upper support ladder 2, and the upper end of the upper support ladder 2 is provided with the upper interception cover 4. The upper end surface of the upper interception cover 4 is provided with pull grooves 5 on both sides, facilitating installation and disassembly. The outer periphery of the upper interception cover 4 is provided with a preliminary interception grid 6, and a plurality of preliminary interception grooves 7 are formed on the preliminary interception grid 6. When rainwater mixed with dirt flows into the floor drain, the preliminary interception grooves 7 on the upper interception cover 4 first perform preliminary interception, which mainly avoids the entry of large dirt into the interior of the floor drain. Although it basically has no blocking function for common dirt such as leaves and stones, it can reduce the burden of subsequent fine interception, reduce the impact and damage of large dirt on the subsequent structure, and prolong the service life of the floor drain.

[0023] The lower end of the annular support platform 1 is provided with a lower support step 3, and the upper end of the lower support step 3 is provided with an upper support platform 9. The inner surface of the upper support platform 9 is provided with an inner inclined annular surface 10, so that rainwater mixed with dirt can flow smoothly along the inclined surface. A dirt interception assembly 8 is arranged in the annular support platform 1, which includes an upper fixed disc 15, an intermediate fixed disc 17 and an inner fixed tube 13. The inner fixed tube 13 is located at the lower end outside the upper fixed disc 15, the upper fixed disc 15 is located at the upper end of the intermediate fixed disc 17, and the intermediate fixed disc 17 is located at the lower end inside the inner fixed tube 13. The inner side of the lower end of the upper support platform 9 is integrally connected with an outer fixed tube 11, and the lower end between the outer fixed tube 11 and the inner fixed tube 13 is integrally connected with a lower annular sealing bottom 12. The inner circumference of the lower annular sealing bottom 12 is integrally connected with a lower circular truncated cone fixed tube 16 along the lower end of the inner fixed tube 13. The lower end of the outer fixed tube 11 is integrally connected with an upper circular truncated cone fixed tube 14, and the inner fixed tube 13 is integrally connected to the lower end of the upper circular truncated cone fixed tube 14. The upper circular truncated cone fixed tube 14 is located in the internal space of the upper support platform 9.

[0024] A plurality of first interception grooves 18 are arranged through the wall of the inner fixed tube 13 in a ring shape. A plurality of second interception grooves 19 are arranged through the wall of the upper circular truncated cone fixed tube 14 in a ring shape. A plurality of first fine interception holes 20 are arranged through the wall of the lower circular truncated cone fixed tube 16. A plurality of second fine interception holes 21 are arranged through the upper end surface of the intermediate fixed disc 17. The space between the upper support platform 9, the outer fixed tube 11, the lower annular sealing bottom 12, the inner fixed tube 13 and the upper circular truncated cone fixed tube 14 forms an outer dirt cavity 22. The space between the inner fixed tube 13, the upper circular truncated cone fixed tube 14, the lower circular truncated cone fixed tube 16 and the intermediate fixed disc 17 forms an inner dirt cavity 23. The inner dirt cavity 23 has less dirt, and even if there is small-sized dirt, it is generally wrapped and carried into the outer dirt cavity 22 by large-sized dirt, and will not move inward. In sandy soil and gravel areas or other necessary cases, in order to ensure the cleaning of the inside, a cover is connected to the upper end surface of the upper fixed disc 15 by bolts or rotating members for internal cleaning. Rainwater mixed with dirt flows into the outer dirt cavity 22 through the inner inclined annular surface 10 and the inclined surface of the upper circular truncated cone fixed tube 14. Rainwater can leak through the first interception grooves 18 on the inner fixed tube 13 and the second interception grooves 19 on the upper circular truncated cone fixed tube 14. Large-sized dirt is intercepted in the outer dirt cavity 22. At this time, most of the dirt is intercepted, and only a small part of the dirt moves with the rainwater. This multi-stage interception structure can perform staged interception according to the size of the dirt, improve the interception efficiency, effectively reduce the amount of dirt entering the inner dirt cavity 23 and the subsequent drainage pipeline, and ensure the smoothness of the drainage system.

[0025] The lower circular truncated cone fixed pipe 16 is integrally connected to the outer lower end of the middle fixed disc 17. When small size dirt moves downward with rainwater due to gravity, it will be intercepted by the first fine interception hole 20 on the lower circular truncated cone fixed pipe 16 and the second fine interception hole 21 on the middle fixed disc 17, and the rainwater will leak through these fine interception holes. The design of the first fine interception hole 20 and the second fine interception hole 21 further refines the interception of small size dirt, and can intercept even smaller dirt particles.

[0026] A lower water receiving disc 24 is arranged in the middle of the lower end of the dirt interception assembly 8. The lower water receiving disc 24 is composed of a water receiving body 25 and a plurality of flow guide pieces 26. The plurality of flow guide pieces 26 are arranged in a ring array outside the water receiving body 25, and a force receiving cavity 27 is formed in the water receiving body 25. A rectangular slot 28 is formed on the outer periphery of the upper end surface of the water receiving body 25 between adjacent two flow guide pieces 26. A first C-shaped fixing seat 30 is fixed to the lower end of the lower ring-shaped sealing bottom 12 along the upper end of the rectangular slot 28. A rotating piece 29 is rotatably connected in the first C-shaped fixing seat 30 and the rectangular slot 28. A spring rod 31 is fixed between each pair of upper and lower corresponding rotating pieces 29. When the rainwater reaches the force receiving cavity 27 of the lower water receiving disc 24 and exerts a certain pressure on the lower water receiving disc 24, it flows outwards through the flow guide pieces 26 and enters the underground pipe network system. The ring array design of the flow guide pieces 26 enables the rainwater to flow outwards uniformly, improving the drainage efficiency. The uniform flow design can prevent the rainwater from concentrating in a certain area, reducing the local impact on the underground pipe network.

[0027] An outer sleeve 32 is fixed to the upper end of the lower water receiving disc 24. The outer sleeve 32 extends upwards through the middle fixed disc 17 and slides along the middle fixed disc 17. A middle rod 34 is fixed to the lower end of the upper fixed disc 15. The lower end of the middle rod 34 extends into the outer sleeve 32 and has a limiting sliding relationship with the outer sleeve 32. An upper fixing ring 33 is integrally connected to the outer sleeve 32. A pressure spring 35 is installed between the upper fixing ring 33 and the upper fixed disc 15 along the outer periphery of the middle rod 34. When the rainwater leaks through the first fine interception hole 20 on the lower circular truncated cone fixed pipe 16 and the second fine interception hole 21 on the middle fixed disc 17, it exerts a certain pressure on the lower water receiving disc 24. When the flow rate of the rainwater flowing into the floor drain is too fast due to excessive rainwater, the pressure will increase. When the pressure exceeds the force exerted by the pressure spring 35, the outer sleeve 32 and the lower water receiving disc 24 will move downwards along the middle rod 34, the pressure spring 35 will be stretched, and the upper fixing ring 33 and a plurality of second C-shaped fixing seats 36 will be driven to move downwards. The design of the pressure spring 35 enables the floor drain to automatically adjust the structure position according to the pressure of the rainwater, always maintaining good drainage performance, and avoiding the problem of poor drainage caused by excessive rain.

[0028] The second C-shaped fixing seat 36 is fixed outside the "rice" shaped outer end in eight directions, the action rod 37 is connected with the second C-shaped fixing seat 36 through shaft rotation, the action rod 37 extends outward through the first interception groove 18, the limiting sliding groove 39 is arranged on the action rod 37, and the horizontal fixing rod 38 and the limiting sliding groove 39 are in limiting sliding relationship.

[0029] Due to the downward movement of the second C-shaped fixing seat 36, the shaft rotation connection relationship between the second C-shaped fixing seat 36 and the action rod 37, and the limiting sliding relationship between the limiting sliding groove 39 on the action rod 37 and the horizontal fixing rod 38 in the first interception groove 18 on the inner fixed pipe 13, the action rod 37 rotates outward, the triangular strip 41 moves from the dirt to expand a gap between the dirt, so that the rainwater can pass through.

[0030] In some rainy cities, the length of the action rod 37 can be shortened, the original angle of the action rod 37 is large, and therefore a plurality of layers of pick-up structures (the upper fixed ring 33, a plurality of second C-shaped fixing seats 36, a plurality of action rods 37 and a plurality of horizontal fixing rods 38 are a layer of pick-up structure) are arranged at equal intervals from top to bottom outside the outer sleeve 32. When the rain is heavy, each structure can pick up a plurality of gaps, so that the dirt does not block the first interception groove 18 and the second interception groove 19. The design of the multi-layer pick-up structure further enhances the application ability of the floor drain in the rainy city, and in the case of heavy rainfall and large amount of dirt, the rainwater can be quickly discharged through a plurality of pick-up gaps.

[0031] Working principle: when the rainwater mixed with dirt flows to the floor drain, the preliminary interception groove 7 on the upper interception cover 4 performs preliminary interception. The rainwater mixed with dirt flows to the outer dirt cavity 22 through the inner inclined annular surface 10 and the inclined surface of the upper circular truncated cone fixed pipe 14, the rainwater can leak through the first interception groove 18 on the inner fixed pipe 13 and the second interception groove 19 on the upper circular truncated cone fixed pipe 14, and the dirt with large size is intercepted in the outer dirt cavity 22. The rainwater mixed with small-size dirt flows downward due to gravity, the small-size dirt is intercepted by the first fine interception hole 20 on the lower circular truncated cone fixed pipe 16 and the second fine interception hole 21 on the intermediate fixed disc 17, and the rainwater leaks through the first fine interception hole 20 on the lower circular truncated cone fixed pipe 16 and the second fine interception hole 21 on the intermediate fixed disc 17.

[0032] When the rain water leaks through the first fine intercepting hole 20 on the lower conical fixed tube 16 and the second fine intercepting hole 21 on the middle fixed disc 17, it has a certain pressure on the lower water receiving disc 24. When the pressure exceeds the force given by the pressure spring 35, the outer sleeve 32 and the lower water receiving disc 24 will move downward along the middle rod 34. The upper fixed ring 33 and the plurality of second C-shaped fixed seats 36 are driven to move downward. The action rod 37 rotates outward. The triangular strip 41 moves away from the dirt to expand a certain gap between the dirt, so that the rain water can pass through. When the rain is slow, the flow rate of the rain water decreases, and the dirt will not be carried by the rain water to the first intercepting groove 18 and the second intercepting groove 19, so as to block the first intercepting groove 18 and the second intercepting groove 19. Instead, the dirt moves to the lower end of the outer dirt cavity 22 due to its own gravity. At the same time, the action rod 37 is driven to rotate inward and reset under the action of the pressure spring 35.

[0033] When the rain water reaches the force receiving cavity 27 of the lower water receiving disc 24 and gives the lower water receiving disc 24 a certain pressure, it flows outward through the flow guide 26 and enters the underground pipe network system.

[0034] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims.

Claims

1. A floor drain with sewage interception function suitable for sponge city, comprising an annular support table (1), characterized in that: The annular support table (1) is internally provided with a dirt intercepting assembly (8), the dirt intercepting assembly (8) comprises an upper fixed disc (15), an intermediate fixed disc (17) and an inner fixed tube (13), the inner fixed tube (13) is located at the outer lower end of the upper fixed disc (15), the upper fixed disc (15) is located at the upper end of the intermediate fixed disc (17), and the intermediate fixed disc (17) is located at the inner lower end of the inner fixed tube (13); the lower end of the dirt intercepting assembly (8) is provided with a lower water receiving disc (24) in the middle, the upper end of the lower water receiving disc (24) is fixed with an outer sleeve (32) in the middle, the outer sleeve (32) extends upwards through the intermediate fixed disc (17), and the outer sleeve (32) is limited to slide along the intermediate fixed disc (17); the lower end of the upper fixed disc (15) is fixed with an intermediate rod (34) in the middle, the lower end of the intermediate rod (34) extends into the outer sleeve (32) and is in limited sliding relationship with the outer sleeve (32); the outer sleeve (32) is integrally connected with an upper fixed ring (33) at the outer upper end, and a pressure spring (35) is installed outside the intermediate rod (34) between the upper fixed ring (33) and the upper fixed disc (15); eight second C-shaped fixed bases (36) are fixed at the outer ends of the upper fixed ring (33) in eight directions, respectively, the second C-shaped fixed bases (36) are rotatably connected with action rods (37) through shafts, and the action rods (37) extend outward through the inner fixed tube (13).

2. The floor drain with sewage interception function suitable for sponge city according to claim 1, characterized in that: The lower end of the annular support table (1) is provided with a lower support ladder (3), the upper end of the annular support table (1) is provided with an upper support table (9) along the lower support ladder (3), the inner surface of the upper support table (9) is provided as an inner inclined annular surface (10), the lower end of the outer surface of the upper fixed disc (15) is integrally connected with an upper circular truncated cone fixed tube (14), the inner fixed tube (13) is integrally connected to the lower end of the upper circular truncated cone fixed tube (14), and the upper circular truncated cone fixed tube (14) is located in the inner space of the upper support table (9).

3. The floor drain with sewage interception function suitable for sponge city according to claim 2, characterized in that: The inner side of the lower end of the upper support table (9) is integrally connected with an outer fixed tube (11), the lower end between the outer fixed tube (11) and the inner fixed tube (13) is integrally connected with a lower annular sealing bottom (12), the lower annular sealing bottom (12) is integrally connected with a lower circular truncated cone fixed tube (16) around the inner fixed tube (13) at the lower end, and the lower circular truncated cone fixed tube (16) is integrally connected to the outer lower end of the intermediate fixed disc (17).

4. The floor drain with sewage interception function suitable for sponge city according to claim 3, characterized in that: A plurality of first intercepting grooves (18) are formed through the wall of the inner fixed tube (13) in a ring shape, a plurality of second intercepting grooves (19) are formed through the wall of the upper circular truncated cone fixed tube (14) in a ring shape, a plurality of first fine intercepting holes (20) are formed through the wall of the lower circular truncated cone fixed tube (16), and a plurality of second fine intercepting holes (21) are formed through the upper end surface of the intermediate fixed disc (17).

5. The floor drain with sewage interception function suitable for sponge city according to claim 4, characterized in that: The outer end of the "rice" character extends in eight directions, and the lower end of the first interception groove (18) is fixed with a transverse fixed rod (38). The action rod (37) extends outward through the first interception groove (18) extending in eight directions of the outer end of the "rice" character, and a limiting sliding groove (39) is formed in the action rod (37). The transverse fixed rod (38) and the limiting sliding groove (39) have a limiting sliding relationship.

6. The floor drain with sewage interception function suitable for sponge city according to claim 1, characterized in that: The outer end of each action rod (37) is provided with a separation groove (40) from top to bottom, and two triangular strips (41) are formed by the separation of the separation groove (40). The upper end length of the triangular strip (41) is less than the lower end length of the triangular strip (41).

7. The floor drain with sewage interception function suitable for sponge city according to claim 3, characterized in that: The lower water receiving disc (24) is composed of a water receiving main body (25) and a plurality of flow guides (26). The plurality of flow guides (26) are arranged in a ring shape outside the water receiving main body (25), and a stress cavity (27) is formed in the water receiving main body (25).

8. The floor drain with sewage interception function suitable for sponge city according to claim 7, characterized in that: A rectangular slot (28) is formed in the outer periphery of the upper end face of the water receiving main body (25) between adjacent two flow guides (26). The lower end of the lower ring-shaped sealing bottom (12) is fixed with a first C-shaped fixing seat (30) at the upper end of the rectangular slot (28). The first C-shaped fixing seat (30) and the rectangular slot (28) are both rotatably connected with a rotating piece (29) through a shaft. Each group of two rotating pieces (29) corresponding in upper and lower positions is fixed with a spring rod (31).

9. The floor drain with dirt interception function suitable for sponge city according to claim 3, characterized in that: The space formed between the upper support table (9), the outer fixed tube (11), the lower ring-shaped sealing bottom (12), the inner fixed tube (13) and the upper circular table-shaped fixed tube (14) is an outer dirt cavity (22). The space formed between the inner fixed tube (13), the upper circular table-shaped fixed tube (14), the lower circular table-shaped fixed tube (16) and the middle fixed disc (17) is an inner dirt cavity (23).

10. The floor drain with dirt interception function suitable for sponge city according to claim 1, characterized in that: The upper end of the inner part of the annular support table (1) is provided with an upper support step (2). The inner part of the annular support table (1) is provided with an upper interception cover (4) along the upper end of the upper support step (2). Two sides of the upper end face of the upper interception cover (4) are provided with pull grooves (5). The outer periphery of the upper interception cover (4) is provided with a preliminary interception grid (6). A plurality of preliminary interception grooves (7) are formed in the preliminary interception grid (6).

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